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#eff6ffe6 0%, #f8fafcf0 55%, #dbeafec7 100%);--complexity-border:#bfdbfe;--complexity-label:#475569;--complexity-value:#1e3a8a;--complexity-note:#475569;--complexity-title-text:#334155;--complexity-title-underline:#93c5fd;--solution-toggle-btn-bg:#fafafa;--solution-toggle-btn-border:#e5e5e5;--solution-toggle-btn-text:#475569;--solution-toggle-btn-hover-bg:#f1f5f9;--solution-toggle-btn-hover-text:#334155;--solution-toggle-btn-hover-border:#cbd5e1;--solution-toggle-btn-active-bg:#2563eb;--solution-toggle-btn-active-text:#fff;--solution-toggle-btn-active-hover-bg:#1d4ed8;--solution-header-bg:#f8fafc;--solution-header-border:#f1f5f9;--solution-lang-rail-bg:#f1f5f9;--solution-lang-rail-border:#e2e8f0;--solution-lang-panel-bg:#fff;--solution-lang-bg:#fff;--solution-lang-text:#475569;--solution-lang-border:#dbe3ec;--solution-lang-hover-bg:#f8fafc;--solution-lang-hover-text:#0f172a;--solution-lang-hover-border:#cbd5e1;--solution-lang-active-bg:#2563eb;--solution-lang-active-border:#1d4ed8;--solution-lang-active-text:#fff;--solution-hint-bg:#fefce8;--solution-hint-border:#facc15;--solution-hint-text:#854d0e;--solution-hint-title:#a16207;--solution-hint-icon:#ca8a04;--solution-step-border:#94a3b8;--solution-step-active-border:#22c55e;--solution-step-error-border:#ef4444;--solution-step-success-bg:#f0fdf4;--solution-step-error-bg:#fef2f2;--solution-step-number-default:#94a3b8;--solution-step-number-success:#166534;--solution-step-number-error:#dc2626;--solution-verify-bg:#f1f5f9;--solution-verify-border:#cbd5e1;--solution-verify-text:#64748b;--solution-h3-text:#334155;--solution-verify-pass-bg:#dcfce7;--solution-verify-pass-border:#86efac;--solution-verify-pass-text:#166534;--solution-verify-fail-bg:#fee2e2;--solution-verify-fail-border:#ef4444;--solution-verify-fail-text:#dc2626;--solution-loading-text:#64748b;--solution-retry-btn-hover-bg:#1d4ed8;--execution-console-line-error:#b42318;--execution-console-line-test-pass:#027a48;--execution-console-line-test-fail:#b42318;--execution-console-line-test-detail:var(--color-text-secondary);--execution-submit-btn-bg:var(--insert-scaffold-bg);--execution-submit-btn-border:#1d4ed8;--execution-submit-btn-text:var(--color-text-static-white);--execution-submit-btn-hover-bg:var(--insert-scaffold-hover-bg);--execution-submit-btn-hover-border:#1e40af;--execution-submit-btn-hover-text:var(--color-text-static-white);--execution-toolbar-separator:#1e293b;--execution-submit-overlay-bg:var(--color-bg-elevated);--execution-submit-overlay-border:var(--color-border-default);--execution-submit-overlay-text:var(--color-text-secondary);--execution-submit-overlay-title:var(--color-text-primary);--execution-submit-overlay-surface:#ffffffa6;--execution-submit-overlay-gradient-1:#a7f3d0;--execution-submit-overlay-gradient-2:#93c5fd;--execution-submit-overlay-gradient-3:#c4b5fd;--execution-submit-overlay-gradient-4:#67e8f9;--execution-submit-overlay-success-bg:#ecfdf3;--execution-submit-overlay-success-border:#6ce9a6;--execution-submit-overlay-success-surface:#ecfdf3b8;--execution-submit-overlay-success-gradient-1:#34d399;--execution-submit-overlay-success-gradient-2:#22c55e;--execution-submit-overlay-success-gradient-3:#14b8a6;--execution-submit-overlay-success-gradient-4:#4ade80;--execution-submit-overlay-failure-bg:#fef3f2;--execution-submit-overlay-failure-border:#fda29b;--execution-submit-overlay-failure-surface:#fef3f2b8;--execution-submit-overlay-failure-gradient-1:#f97316;--execution-submit-overlay-failure-gradient-2:#ef4444;--execution-submit-overlay-failure-gradient-3:#fb7185;--execution-submit-overlay-failure-gradient-4:#f59e0b;--execution-submit-overlay-neutral-bg:var(--color-bg-elevated);--execution-submit-overlay-neutral-border:var(--color-border-muted);--execution-submit-overlay-neutral-surface:#ffffffad;--execution-submit-overlay-neutral-gradient-1:#60a5fa;--execution-submit-overlay-neutral-gradient-2:#22d3ee;--execution-submit-overlay-neutral-gradient-3:#a78bfa;--execution-submit-overlay-neutral-gradient-4:#38bdf8;--execution-submit-overlay-dismiss-bg:var(--solution-toggle-btn-bg);--execution-submit-overlay-dismiss-border:var(--solution-toggle-btn-border);--execution-submit-overlay-dismiss-text:var(--solution-toggle-btn-text);--solution-error-bg:#fff1f2;--solution-error-border:#fda4af;--solution-error-text:#9f1239;--solution-error-icon-color:#e11d48;--solution-error-icon-bg:#ffe4e6;--solution-error-subtext:#881337;--code-block-bg:#f1f5f9;--code-block-border:#e2e8f0;--code-block-text:#334155;--code-inline-bg:#f1f5f9;--code-inline-border:#e2e8f0;--code-inline-text:#c026d3;--code-inline-method:#7c3aed;--code-inline-type:#0891b2;--code-inline-params:#475569;--code-dark-bg:#1e293b;--code-dark-text:#e2e8f0;--code-copy-bg:#e2e8f0;--code-copy-text:#334155;--syntax-keyword:#d73a49;--syntax-string:#032f62;--syntax-variable:#e36209;--syntax-comment:#6a737d;--syntax-type:#6f42c1;--syntax-function:#6f42c1;--syntax-number:#005cc5;--syntax-operator:#d73a49;--tag-bg:#e0f2fe;--tag-text:#0369a1;--tag-border:transparent;--visual-bg:#f8fa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3px 5px -2px #00000012, 0 1px 3px -1px #0000000a;--btn-bg:var(--toolbar-btn-bg);--btn-border:var(--toolbar-btn-border);--btn-text:var(--toolbar-btn-text);--btn-hover-bg:var(--toolbar-btn-hover-bg);--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--shadow-glow:0 0 15px #3b82f680;--shadow-inset-sm:inset 0 2px 4px #0000000d;--shadow-sm-color:#0000000d;--toggle-bg:#fff;--toggle-border:#cbd5e1;--toggle-text:#475569;--toggle-hover-bg:#f8fafc;--toggle-hover-text:#0f172a;--problem-nav-btn-bg:#f8fafc;--problem-nav-btn-text:#64748b;--problem-nav-btn-border:#e2e8f0;--problem-nav-btn-hover-bg:#e2e8f0;--problem-nav-btn-hover-text:#334155;--problem-nav-btn-disabled-opacity:.4;--btn-secondary-border:#cbd5e1;--button-radius:6px}[data-theme=dark]{--insert-scaffold-bg:linear-gradient(135deg, #d97706, #b45309);--insert-scaffold-hover-bg:linear-gradient(135deg, #ea580c, #b45309);--color-bg-primary:#1a1a1a;--color-bg-secondary:#0f0f0f;--color-bg-tertiary:#1a1a1a;--color-bg-elevated:#242424;--color-text-primary:#e0e0e0;--color-text-secondary:#9a9a9a;--color-text-tertiary:#b8b8b8;--color-text-muted:#888;--color-text-subtle:#707070;--color-border-default:#272727;--color-border-muted:#353535;--color-accent-primary:#888;--color-accent-secondary:#9a9a9a;--color-accent-bg:#88888826;--color-accent-text:#d0d0d0;--sidebar-bg:#1a1a1a;--sidebar-border:#272727;--sidebar-text:#a8a8a8;--sidebar-text-hover:#b8b8b8;--sidebar-item-hover-bg:#242424;--sidebar-item-active-bg:#88888826;--sidebar-item-active-text:#ececec;--sidebar-item-hover-glass-bg:linear-gradient(145deg, #5858585c 0%, #4444444d 52%, #2828286b 100%);--sidebar-item-hover-glass-border:#88888857;--sidebar-item-hover-glass-shadow:inset 0 1px 0 #ffffff12, 0 8px 20px #0000004d;--sidebar-item-active-glass-bg:linear-gradient(140deg, #68686870 0%, #53535366 52%, #3a3a3a8a 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#0000001a;--accordion-bg:#121212;--accordion-text:#9a9a9a;--accordion-hover-bg:#242424;--accordion-icon-bg:#242424;--accordion-icon-color:#9a9a9a;--accordion-header-text-hover:#e0e0e0;--accordion-header-bg:#121212;--accordion-header-bg-hover:#242424;--accordion-border:#404040;--accordion-icon-bg-hover:#383838;--accordion-icon-color-hover:#e0e0e0;--toolbar-bg:#1a1a1af2;--toolbar-border:#272727;--toolbar-btn-bg:#2e2e2e;--toolbar-btn-border:#363636;--toolbar-btn-text:#d0d0d0;--toolbar-btn-hover-bg:#383838;--toolbar-btn-hover-text:#e0e0e0;--modal-overlay-bg:#000000eb;--modal-bg:#242424;--modal-shadow:0 24px 38px 3px #0006, 0 9px 46px 8px #0000004d, 0 11px 15px -7px 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100%);--problem-desc-text:#9a9a9a;--section-title-color:#94a3b8;--highlight-bg:#fef3c71a;--highlight-text:#fde68a;--mono-bg:#202020;--problem-mono-bg:#202020;--problem-mono-text:#d4d4d4;--problem-mono-border:#353535;--problem-intro-text:#9a9a9a;--force-light-bg-in-dark:#444;--example-bg:#1b1b1b;--example-border:#272727;--example-header-bg:#1a1a1a;--example-header-text:#9a9a9a;--example-label-text:#9a9a9a;--example-io-bg:#202020;--example-io-border:#353535;--example-output-bg:#16653433;--example-output-text:#86efac;--example-explanation-border:#353535;--example-explanation-text:#9a9a9a;--edge-case-bg:#1e1e1e;--edge-case-border:#353535;--edge-case-icon-bg:#1a1a1a;--edge-case-icon-color:#888;--edge-case-text:#b8b8b8;--constraints-bg:#b4b4b41a;--constraints-border:#707070;--constraints-text:#c8c8c8;--constraints-bullet:#93c5fd;--constraints-icon:#888;--constraints-box-bg:#1f1f1f;--constraints-box-border:#000;--constraints-list-text:#d1d5db;--complexity-bg:linear-gradient(140deg, #3c3c3c8a 0%, #22222270 55%, #0000004d 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1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #00000080, 0 2px 4px -2px #0000004d;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -4px #0000004d;--shadow-glow:0 0 15px #3b82f64d;--toggle-bg:#2e2e2e;--toggle-border:#363636;--toggle-text:#d0d0d0;--toggle-hover-bg:#383838;--toggle-hover-text:#e0e0e0;--highlight-success-bg:#16653433;--highlight-success-text:#86efac;--highlight-success-border:#14532d;--highlight-warning-bg:#92400e33;--highlight-warning-text:#fde68a;--highlight-warning-border:#78350f;--trace-header-bg:#1a1a1a;--trace-header-text:#e0e0e0;--trace-border:#353535;--trace-bg:#1e1e1e;--trace-row-stripe:#ffffff08;--code-sm-bg:#2d2d2d;--code-sm-text:#a0a0a0;--code-sm-null:#64748b;--code-sm-success-bg:#16653433;--code-sm-success-text:#86efac;--code-sm-miss-bg:#7f1d1d66;--code-sm-miss-text:#fca5a5;--cache-item-bg:#1e3a8a4d;--cache-item-text:#93c5fd;--cache-item-active-bg:#16653433;--cache-item-active-text:#86efac;--cache-item-active-border:#14532d;--cache-evicted-bg:#7f1d1d66;--cache-evicted-text:#fca5a5;--hashmap-bg:#a162071a;--hashmap-border:#713f12;--hashmap-key:#fde047;--hashmap-arrow:#b45309;--hashmap-value:#fcd34d;--dll-node-border:#475569;--dll-node-bg:#1e1e1e;--dll-mru-border:#14532d;--dll-mru-bg:#16653433;--dll-mru-text:#86efac;--dll-lru-border:#7f1d1d;--ws-grid-bg:#1e1e1e;--ws-cell-bg:#2d2d2d;--ws-cell-border:#404040;--ws-cell-text:#a0a0a0;--ws-cell-active-bg:#a7e82f;--ws-cell-active-text:#1a1a1a;--sm-grid-bg:#1e1e1e;--sm-cell-bg:#2d2d2d;--sm-cell-border:#404040;--sm-cell-text:#e2e8f0;--sm-path-color:#a7e82f;--table-th-bg:#242424;--table-stripe-bg:#ffffff08;--table-border:#353535;--scroll-track:transparent;--scroll-thumb:#404040;--scroll-thumb-hover:#606060;--focus-ring:#88888880;--overlay-backdrop:#000c;--text-header:var(--color-text-primary);--text-main:var(--color-text-secondary);--intro-color:var(--color-text-muted)}[data-theme=warm]{--color-bg-primary:#faf9f7;--color-bg-secondary:#f4f3f1;--color-text-primary:#1a1612;--color-text-secondary:#38322a;--color-text-tertiary:#4a4339;--color-text-muted:#665d52;--color-text-subtle:#968b7e;--color-border-default:#e7e3dc;--color-border-muted:#d0c8bc;--color-accent-primary:#6f6457;--color-accent-secondary:#009000;--color-accent-bg:#e7e2d8;--color-accent-text:#3f3528;--insert-scaffold-bg:linear-gradient(135deg, #009000, #00a000);--insert-scaffold-hover-bg:linear-gradient(135deg, #00a000, #009000);--sidebar-bg:#f4f3f1;--sidebar-border:#e9dccc;--sidebar-text:#4a4339;--sidebar-text-hover:#1a1612;--sidebar-item-hover-bg:#e7e3dc;--sidebar-item-active-bg:#e7e2d8;--sidebar-item-active-text:#005a00;--sidebar-item-hover-glass-bg:linear-gradient(145deg, #ffffff85 0%, #e7e2d847 52%, #d0c8bc33 100%);--sidebar-item-hover-glass-border:#968b7e73;--sidebar-item-hover-glass-shadow:inset 0 1px 0 #ffffff9e, 0 8px 18px #1a161217;--sidebar-item-active-glass-bg:linear-gradient(140deg, #e7e2d8b8 0%, #d0c8bc99 92%, #fffffff0 100%);--sidebar-item-active-glass-border:#6f645785;--sidebar-item-active-glass-shadow:inset 0 1px 0 #ffffffa6, 0 8px 16px -4px #3f352826;--sidebar-search-border:#e7e3dc;--sidebar-brand-text:#1a1612;--accordion-text:#1a1612;--accordion-hover-bg:#faf9f7;--accordion-icon-bg:#f4f3f1;--accordion-icon-color:#665d52;--accordion-icon-bg-hover:#e7e3dc;--accordion-icon-color-hover:#1a1612;--accordion-header-text-hover:#1a1612;--accordion-header-bg-hover:#faf9f7;--accordion-border:#e9dccc;--toolbar-border:#e7e3dc;--toolbar-btn-border:#e9dccc;--toolbar-btn-text:#4a4339;--toolbar-btn-hover-bg:#faf9f7;--toolbar-btn-hover-text:#1a1612;--modal-header-bg:#faf9f7;--modal-header-text:#1a1612;--modal-header-border:#e7e3dc;--modal-body-text:#4a4339;--modal-body-heading:#2a2418;--modal-body-subheading:#3a342a;--modal-list-text:#38322a;--modal-list-icon:#665d52;--modal-nested-bg:#f4f3f1;--modal-nested-border:#e7e3dc;--modal-nested-text:#4a4339;--modal-footer-border:#e7e3dc;--modal-checkbox-text:#665d52;--modal-btn-bg:#009000;--modal-btn-hover-bg:#3f3528;--card-border:#e7e3dc;--card-title-text:#1a1612;--problem-title-number-text:#aa9f90;--card-active-gradient:linear-gradient(135deg, #7d7060 0%, #857868 33%, #8d806f 67%, #948875 100%);--problem-desc-text:#38322a;--section-title-color:#665d52;--mono-bg:#f4f3f1;--problem-mono-bg:#f4f3f1;--problem-mono-text:#6a5d4f;--problem-mono-border:#e7e3dc;--problem-intro-text:#665d52;--example-border:#e7e3dc;--example-header-bg:#faf9f7;--example-header-text:#665d52;--example-label-text:#4a4339;--example-io-bg:#f4f3f1;--example-io-border:#e7e3dc;--example-explanation-border:#e7e3dc;--example-explanation-text:#4a4339;--edge-case-icon-bg:#f4f3f1;--edge-case-icon-color:#665d52;--edge-case-text:#4a4339;--constraints-box-border:#d0c8bc;--complexity-bg:linear-gradient(140deg, #f4f3f1e6 0%, #faf9f7f0 55%, #e7e2d8c7 100%);--complexity-border:#d0c8bc;--complexity-label:#4a4339;--complexity-value:#3f3528;--complexity-note:#4a4339;--complexity-title-text:#38322a;--complexity-title-underline:#aa9f90;--solution-toggle-btn-text:#4a4339;--solution-toggle-btn-hover-bg:#f4f3f1;--solution-toggle-btn-hover-text:#38322a;--solution-toggle-btn-hover-border:#d0c8bc;--solution-toggle-btn-active-bg:#009000;--solution-toggle-btn-active-hover-bg:green;--solution-header-bg:#faf9f7;--solution-header-border:#f4f3f1;--solution-lang-rail-bg:#f4f3f1;--solution-lang-rail-border:#e7e3dc;--solution-lang-panel-bg:#fff;--solution-lang-bg:#fdfcfb;--solution-lang-text:#4a4339;--solution-lang-border:#e0dbd2;--solution-lang-hover-bg:#f8f7f5;--solution-lang-hover-text:#2a251e;--solution-lang-hover-border:#cdc6ba;--solution-lang-active-bg:#008700;--solution-lang-active-border:#006e00;--solution-lang-active-text:#fff;--solution-step-border:#968b7e;--solution-step-number-default:#968b7e;--solution-verify-bg:#f4f3f1;--solution-verify-border:#d0c8bc;--solution-verify-text:#665d52;--solution-h3-text:#38322a;--solution-loading-text:#665d52;--solution-retry-btn-hover-bg:#3f3528;--execution-submit-btn-border:#007000;--execution-submit-btn-hover-border:#006b00;--execution-toolbar-separator:#3f3528;--execution-submit-overlay-gradient-2:#aa9f90;--execution-submit-overlay-gradient-3:#b8a89a;--execution-submit-overlay-neutral-gradient-1:#8a7d6c;--execution-submit-overlay-neutral-gradient-2:#8a7d6c;--execution-submit-overlay-neutral-gradient-3:#8a7d6c;--execution-submit-overlay-neutral-gradient-4:#8a7d6c;--code-block-bg:#f4f3f1;--code-block-border:#e7e3dc;--code-block-text:#38322a;--code-inline-bg:#f4f3f1;--code-inline-border:#e7e3dc;--code-inline-text:#6a5d4f;--code-inline-method:#6a5d4f;--code-inline-type:#5a5044;--code-inline-params:#4a4339;--code-copy-bg:#e7e3dc;--code-copy-text:#38322a;--syntax-string:#2a2218;--syntax-comment:#6e655c;--syntax-type:#6a5d4f;--syntax-function:#6a5d4f;--syntax-number:#009000;--tag-bg:#eeeae3;--tag-text:#009000;--visual-bg:#faf9f7;--visual-border:#d0c8bc;--visual-text:#665d52;--visual-node-border:#38322a;--visual-arrow:#968b7e;--heap-structure-bg:#faf9f7;--heap-structure-border:#d0c8bc;--heap-label:#665d52;--heap-node-border:#6f6457;--heap-node-text:#3f3528;--heap-root-bg:#f4f3f1;--heap-root-border:#009000;--heap-src-text:#8a7d6c;--heap-connector:#d0c8bc;--heap-caption:#968b7e;--heap-action:#6f6457;--visual-water-bg:#e7e2d8;--ws-grid-bg:#e7e3dc;--ws-cell-border:#d0c8bc;--ws-cell-text:#665d52;--ws-cell-active-bg:#6f6457;--sm-grid-bg:#faf9f7;--sm-cell-border:#e7e3dc;--sm-cell-text:#3f3528;--sm-path-color:#6f6457;--table-th-bg:#faf9f7;--table-border:#e7e3dc;--trace-header-bg:#3f3528;--trace-border:#e7e3dc;--code-sm-bg:#f4f3f1;--code-sm-text:#38322a;--code-sm-null:#968b7e;--cache-item-bg:#e7e2d8;--cache-item-text:#3f3528;--dll-node-border:#968b7e;--visual-container-border:#d0c8bc;--rain-bar-bg:#1a1612;--rain-water-bg:#6f6457;--grid-visual-border:#38322a;--grid-visual-bg:#38322a;--scroll-thumb:#d0c8bc;--scroll-thumb-hover:#968b7e;--focus-ring:#6f645780;--sidebar-search-clear-bg:#e7e3dc;--sidebar-search-clear-text:#665d52;--sidebar-search-clear-hover-bg:#d0c8bc;--sidebar-search-clear-hover-text:#4a4339;--shadow-glow:0 0 15px #6f645780;--toggle-border:#d0c8bc;--toggle-text:#4a4339;--toggle-hover-bg:#faf9f7;--toggle-hover-text:#1a1612;--problem-nav-btn-bg:#faf9f7;--problem-nav-btn-text:#665d52;--problem-nav-btn-border:#e7e3dc;--problem-nav-btn-hover-bg:#e7e3dc;--problem-nav-btn-hover-text:#38322a;--btn-secondary-border:#d0c8bc}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-spin{animation:1s linear infinite spin}[data-theme=dark] .accordion-header i.fa-chevron-down{background:var(--accordion-icon-bg);color:var(--accordion-icon-color)}[data-theme=dark] .accordion-header:hover i.fa-chevron-down{background:var(--toolbar-btn-hover-bg);color:var(--toolbar-btn-hover-text)}[data-theme=dark] .problem-description{color:var(--problem-desc-text)}[data-theme=dark] .example-card{background:var(--example-bg);border:1px solid var(--example-border)}[data-theme=dark] .example-header{background:var(--example-header-bg);color:var(--example-header-text);border-bottom:1px solid var(--example-border)}[data-theme=dark] .example-label{color:var(--example-label-text)}[data-theme=dark] .example-explanation{border-top:1px dashed var(--example-explanation-border);color:var(--example-explanation-text)}[data-theme=dark] .edge-icon{background:var(--edge-case-icon-bg);color:var(--edge-case-icon-color)}[data-theme=dark] .edge-content{color:var(--edge-case-text)}[data-theme=dark] .complexity-item{background:var(--complexity-bg);border:1px solid var(--complexity-border)}[data-theme=dark] .complexity-label{color:var(--complexity-label)}[data-theme=dark] .complexity-value{color:var(--complexity-value)}[data-theme=dark] .complexity-note{color:var(--complexity-note)}[data-theme=dark] .code-inline{background:var(--code-inline-bg);color:var(--code-inline-text);border:1px solid var(--code-inline-border)}[data-theme=dark] .code-inline.method-name{color:var(--code-inline-method)}[data-theme=dark] .code-inline.return-type{color:var(--code-inline-type)}[data-theme=dark] .code-inline.params{color:var(--code-inline-params)}[data-theme=dark] .code-inline.output-array{background:var(--example-output-bg);border-color:var(--example-border);color:var(--example-output-text)}[data-theme=dark] .api-method{background:var(--code-block-bg);border:1px solid var(--code-block-border);border-left:3px solid var(--color-accent-primary)}[data-theme=dark] .api-desc{color:var(--problem-desc-text)}[data-theme=dark] .highlight-good{background:var(--highlight-success-bg);color:var(--highlight-success-text);border:1px solid var(--highlight-success-border)}[data-theme=dark] .highlight-warn{background:var(--solution-verify-pass-bg);color:var(--solution-verify-fail-text);border:1px solid var(--solution-verify-pass-border)}[data-theme=dark] .output-value,[data-theme=dark] .solution-content code:not(.hljs),[data-theme=dark] .mono{background:var(--example-output-bg);color:var(--example-output-text)}[data-theme=dark] .solution-content code:not(.hljs){border:none}[data-theme=dark] 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var(--dll-mru-border);width:36px;height:36px;color:var(--dll-mru-text);font-weight:700;font-family:var(--font-mono);border-radius:6px;justify-content:center;align-items:center;display:flex}.list-node.ghost{border-style:dashed;border-color:var(--dll-mru-border);color:var(--dll-mru-border);background:0 0}.list-link{color:var(--dll-mru-text);font-size:1.1rem}.h-item{font-family:var(--font-mono);background:var(--code-inline-bg);color:var(--code-inline-text);border-radius:4px;padding:2px 6px;font-size:.85rem}.spiral-matrix-grid{background:var(--sm-grid-bg);width:-moz-fit-content;width:fit-content;box-shadow:var(--shadow-inset-sm);border-radius:16px;grid-template-columns:repeat(3,1fr);gap:12px;padding:20px;display:grid}.spiral-matrix-cell{background:var(--sm-cell-bg);border:2px solid var(--sm-cell-border);width:48px;height:48px;color:var(--sm-cell-text);box-shadow:0 2px 4px var(--shadow-sm-color);z-index:1;font-size:1.1rem;font-weight:700;font-family:var(--font-mono);border-radius:10px;justify-content:center;align-items:center;display:flex;position:relative}.spiral-matrix-cell:after{content:"";background:var(--sm-path-color);z-index:10;pointer-events:none;transition:all .3s;position:absolute}.spiral-matrix-cell:before{content:"";border-right:2px solid var(--sm-path-color);border-bottom:2px solid var(--sm-path-color);z-index:10;pointer-events:none;width:6px;height:6px;position:absolute}.spiral-matrix-cell.dir-right:after{width:calc(100% + 12px);height:3px;top:50%;left:50%;transform:translateY(-50%)}.spiral-matrix-cell.dir-right:before{top:50%;left:calc(100% + 5px);transform:translate(-50%,-50%)rotate(-45deg)}.spiral-matrix-cell.dir-down:after{width:3px;height:calc(100% + 12px);top:50%;left:50%;transform:translate(-50%)}.spiral-matrix-cell.dir-down:before{top:calc(100% + 5px);left:50%;transform:translate(-50%,-50%)rotate(45deg)}.spiral-matrix-cell.dir-left:after{width:calc(100% + 12px);height:3px;top:50%;right:50%;transform:translateY(-50%)}.spiral-matrix-cell.dir-left:before{top:50%;right:calc(100% + 5px);transform:translate(50%,-50%)rotate(135deg)}.spiral-matrix-cell.dir-up:after{width:3px;height:calc(100% + 12px);bottom:50%;left:50%;transform:translate(-50%)}.spiral-matrix-cell.dir-up:before{bottom:calc(100% + 5px);left:50%;transform:translate(-50%,50%)rotate(-135deg)}.problem-spiral-matrix-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-spiral-matrix-visual{--problem-spiral-matrix-path:#fff;box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;gap:1rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.35rem);display:grid}[data-theme=warm] 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var(--grid-visual-border);background:var(--grid-visual-bg);border-radius:6px;grid-template-rows:repeat(3,30px);grid-template-columns:repeat(3,30px);gap:4px;padding:6px;display:grid}.r-cell{border-radius:4px;justify-content:center;align-items:center;width:30px;height:30px;font-size:.9rem;display:flex}.r-cell.fresh{background:var(--visual-cell-fresh-bg);border:1px solid var(--visual-cell-fresh-border)}.r-cell.rotten{background:var(--visual-cell-rotten-bg);border:1px solid var(--visual-cell-rotten-border);color:var(--color-text-static-white)}.r-cell.rotten i{color:var(--color-text-static-white);font-size:.8rem}.r-cell.empty{background:var(--grid-cell-bg)}.problem-rotting-oranges-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-rotting-oranges-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;gap:1rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.35rem);display:grid;overflow-x:auto}.problem-rotting-oranges-title{color:var(--color-text-secondary);text-align:center;margin:0;font-size:1rem;font-weight:700}.problem-rotting-oranges-visual .rotting-visual{grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));gap:1rem;width:100%;max-width:64rem;margin:0 auto;padding:0;display:grid}.problem-rotting-oranges-visual .rotting-step{place-items:center;gap:.65rem;min-width:0;display:grid}.problem-rotting-oranges-visual .step-label{width:100%;color:var(--color-text-secondary);text-transform:none;text-align:center;font-size:1rem;font-weight:700}.problem-rotting-oranges-visual .rotting-grid{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--grid-visual-bg);border-radius:.375rem;grid-template-rows:repeat(3,minmax(0,1fr));grid-template-columns:repeat(3,minmax(0,1fr));gap:.35rem;width:100%;max-width:10rem;padding:.5rem;display:grid}.problem-rotting-oranges-visual .r-cell{aspect-ratio:1;border-radius:.375rem;place-items:center;width:auto;min-width:0;height:auto;min-height:2rem;font-size:1rem;display:grid}.problem-rotting-oranges-visual .r-cell.fresh{background:var(--visual-cell-fresh-bg);border:1px solid var(--visual-cell-fresh-border)}.problem-rotting-oranges-visual .r-cell.rotten{background:var(--visual-cell-rotten-bg);border:1px solid var(--visual-cell-rotten-border);color:var(--color-text-static-white)}.problem-rotting-oranges-visual .r-cell.rotten i{color:var(--color-text-static-white);font-size:1rem}.problem-rotting-oranges-visual .r-cell.empty{background:var(--grid-cell-bg);border:1px solid var(--visual-container-border)}.problem-rotting-oranges-note{width:100%;max-width:64rem;color:var(--color-text-secondary);text-align:center;margin:0 auto;font-size:.95rem;line-height:1.5}@media (max-width:600px){.problem-rotting-oranges-visual .rotting-visual{grid-template-columns:repeat(2,minmax(8rem,1fr))}}.problem-reverse-linked-list-visual{--problem-reverse-linked-list-surface:var(--color-bg-secondary);--problem-reverse-linked-list-row:var(--color-bg-primary);--problem-reverse-linked-list-border:var(--color-border-default);--problem-reverse-linked-list-node:var(--color-bg-primary);--problem-reverse-linked-list-node-border:color-mix(in srgb, var(--color-text-secondary) 38%, var(--color-border-default));--problem-reverse-linked-list-input:var(--color-accent-primary);--problem-reverse-linked-list-output:var(--color-accent-secondary);border:1px solid var(--problem-reverse-linked-list-border);background:var(--problem-reverse-linked-list-surface);color:var(--color-text-primary);border-radius:.85rem;margin-bottom:1rem;overflow:hidden}[data-theme=warm] .problem-reverse-linked-list-visual{--problem-reverse-linked-list-surface:#f6f0e8;--problem-reverse-linked-list-row:#fdfaf6;--problem-reverse-linked-list-border:#d8cbbb;--problem-reverse-linked-list-node:#fffaf3;--problem-reverse-linked-list-node-border:#a9967e;--problem-reverse-linked-list-input:#79644d;--problem-reverse-linked-list-output:#477258}[data-theme=dark] .problem-reverse-linked-list-visual{--problem-reverse-linked-list-surface:#090909;--problem-reverse-linked-list-row:#111;--problem-reverse-linked-list-border:#262626;--problem-reverse-linked-list-node:#171717;--problem-reverse-linked-list-node-border:#525252;--problem-reverse-linked-list-input:#fbbf24;--problem-reverse-linked-list-output:#fb923c}.problem-reverse-linked-list-visual__header{border-bottom:1px solid var(--problem-reverse-linked-list-border);gap:.2rem;padding:1.2rem 1.35rem;display:grid}.problem-reverse-linked-list-visual__header strong{font-size:clamp(1.1rem,1.03rem + .35vw,1.35rem);line-height:1.3}.problem-reverse-linked-list-visual__header>span:last-child{color:var(--color-text-secondary);font-size:.95rem}.problem-reverse-linked-list-visual__eyebrow{color:var(--problem-reverse-linked-list-input);letter-spacing:.11em;text-transform:uppercase;font-size:.78rem;font-weight:800}.problem-reverse-linked-list-visual__example-divider{border-top:1px solid var(--color-border-default);margin:1rem 0}.problem-reverse-linked-list-visual__row{border:1px solid var(--problem-reverse-linked-list-border);background:var(--problem-reverse-linked-list-row);border-radius:.5rem;grid-template-columns:minmax(10rem,12rem) minmax(0,42rem);justify-content:center;align-items:center;column-gap:clamp(1.5rem,4vw,4rem);margin:1rem 1.1rem;padding:1rem;display:grid}.problem-reverse-linked-list-visual__row-label{text-align:right;justify-content:flex-end;justify-self:end;align-items:center;gap:.75rem;display:flex}.problem-reverse-linked-list-visual__row-label>span:last-child{gap:.16rem;display:grid}.problem-reverse-linked-list-visual__row-label strong{font-size:.98rem}.problem-reverse-linked-list-visual__row-label small{color:var(--color-text-secondary);font-size:.82rem;line-height:1.4}.problem-reverse-linked-list-visual__stage{border:1px solid color-mix(in srgb, var(--problem-reverse-linked-list-input) 48%, transparent);min-width:3.4rem;color:var(--problem-reverse-linked-list-input);letter-spacing:.05em;text-transform:uppercase;border-radius:.5rem;justify-content:center;align-items:center;padding:.3rem .5rem;font-size:.76rem;font-weight:800;display:inline-flex}.problem-reverse-linked-list-visual__row--output .problem-reverse-linked-list-visual__stage{border-color:color-mix(in srgb, var(--problem-reverse-linked-list-output) 48%, transparent);color:var(--problem-reverse-linked-list-output)}.problem-reverse-linked-list-visual__track{scrollbar-width:thin;padding:1.7rem .15rem .45rem;overflow-x:auto}.problem-reverse-linked-list-visual__list{width:max-content;min-width:100%;font-family:var(--font-family-mono);justify-content:center;align-items:center;gap:clamp(.48rem,1.1vw,.85rem);font-size:1.15rem;display:flex}.problem-reverse-linked-list-visual__node-wrap{display:inline-flex;position:relative}.problem-reverse-linked-list-visual__pointer{color:var(--problem-reverse-linked-list-input);font-size:.82rem;font-weight:800;line-height:1;position:absolute;bottom:calc(100% + .55rem);left:50%;transform:translate(-50%)}.problem-reverse-linked-list-visual__pointer:after{content:"";border:.34rem solid #0000;border-top-color:currentColor;width:0;height:0;position:absolute;top:calc(100% + .18rem);left:50%;transform:translate(-50%)}.problem-reverse-linked-list-visual__row--output .problem-reverse-linked-list-visual__pointer{color:var(--problem-reverse-linked-list-output)}.problem-reverse-linked-list-visual__node{border:2px solid var(--problem-reverse-linked-list-node-border);background:var(--problem-reverse-linked-list-node);width:clamp(3.35rem,4.5vw,3.8rem);height:clamp(3.35rem,4.5vw,3.8rem);color:var(--color-text-primary);border-radius:50%;flex:none;justify-content:center;align-items:center;font-weight:800;display:inline-flex}.problem-reverse-linked-list-visual__node--input-head{border-color:var(--problem-reverse-linked-list-input);background:color-mix(in srgb, var(--problem-reverse-linked-list-input) 16%, var(--problem-reverse-linked-list-node));color:var(--problem-reverse-linked-list-input)}.problem-reverse-linked-list-visual__node--output,.problem-reverse-linked-list-visual__node--output-head{border-color:var(--problem-reverse-linked-list-output)}.problem-reverse-linked-list-visual__node--output-head{background:color-mix(in srgb, var(--problem-reverse-linked-list-output) 16%, var(--problem-reverse-linked-list-node));color:var(--problem-reverse-linked-list-output)}.problem-reverse-linked-list-visual__arrow{color:var(--color-text-secondary);flex:none;font-size:clamp(1.35rem,2vw,1.65rem);font-weight:500}.problem-reverse-linked-list-visual__null{border:1px dashed var(--problem-reverse-linked-list-node-border);color:var(--color-text-secondary);border-radius:.4rem;flex:none;padding:.38rem .55rem;font-size:.88rem;font-weight:700}.problem-reverse-linked-list-visual__transition{color:var(--color-text-secondary);grid-template-columns:minmax(1rem,1fr) auto minmax(1rem,1fr);align-items:center;gap:.75rem;padding-inline:2rem;display:grid}.problem-reverse-linked-list-visual__transition span{border-top:1px dashed var(--problem-reverse-linked-list-border)}.problem-reverse-linked-list-visual__transition strong{letter-spacing:.08em;text-transform:uppercase;font-size:.78rem}.problem-reverse-linked-list-visual__note{color:var(--color-text-secondary);margin:0;padding:0 1.35rem 1.2rem;font-size:.92rem;line-height:1.55}@media (max-width:760px){.problem-reverse-linked-list-visual__row{grid-template-columns:minmax(0,1fr)}.problem-reverse-linked-list-visual__list{justify-content:flex-start}.problem-reverse-linked-list-visual__row-label{text-align:left;justify-content:flex-start;justify-self:start}}@media (max-width:480px){.problem-reverse-linked-list-visual__header{padding:1rem}.problem-reverse-linked-list-visual__row{margin:.8rem;padding:.85rem}.problem-reverse-linked-list-visual__row-label{align-items:flex-start}.problem-reverse-linked-list-visual__note{padding-inline:1rem}}[data-theme=dark] .visual-container{background:var(--visual-bg);border:1px dashed var(--visual-border)}[data-theme=dark] .visual-container.force-light-bg-in-dark{background:var(--force-light-bg-in-dark)}.visual-container{background:var(--visual-container-bg);border:1px dashed var(--visual-container-border);border-radius:8px;justify-content:center;align-items:center;min-height:100px;margin:20px 0;padding:20px;display:flex}.node{border:2px solid var(--accent);background:var(--visual-node-bg);z-index:2;border-color:var(--visual-node-border);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-weight:700;display:flex}.arrow{color:var(--visual-arrow);font-size:20px}.list-visual{align-items:center;gap:8px;display:flex}.word-search-grid{background:var(--ws-grid-bg);border-radius:8px;grid-template-columns:repeat(4,1fr);gap:0;width:-moz-fit-content;width:fit-content;padding:10px;display:grid}.word-search-cell{background:var(--ws-cell-bg);width:36px;height:36px;color:var(--ws-cell-text);border:1px solid var(--ws-cell-border);font-weight:700;font-family:var(--font-mono);justify-content:center;align-items:center;margin-bottom:-1px;margin-right:-1px;font-size:1rem;transition:all .2s;display:flex;position:relative}.word-search-cell.active{background:var(--ws-cell-active-bg);color:var(--ws-cell-active-text);z-index:10;border-color:var(--ws-cell-active-bg);box-shadow:0 0 0 1px var(--ws-cell-active-bg)}.problem-word-search-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-word-search-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.35rem);overflow-x:auto}.problem-word-search-title{color:var(--color-text-secondary);text-align:center;margin:0 0 1rem;font-size:1rem;font-weight:700}.problem-word-search-visual .word-search-grid{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--grid-visual-bg);border-radius:.5rem;grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;width:min(100%,25rem);margin:0 auto;padding:.75rem;display:grid}.problem-word-search-visual .word-search-cell{aspect-ratio:1;box-sizing:border-box;border:1px solid var(--visual-node-border);background:var(--card-bg);width:auto;height:auto;min-height:4.5rem;color:var(--color-text-primary);font-family:var(--font-mono);box-shadow:none;border-radius:.375rem;place-items:center;padding:0;font-size:1.15rem;font-weight:700;display:grid}.problem-word-search-visual .word-search-cell.active{background:var(--highlight-success-bg);color:var(--highlight-success-text);border-color:var(--highlight-success-border);box-shadow:none}.problem-word-search-target{max-width:32rem;color:var(--color-text-secondary);font-family:var(--font-mono);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}.tree-visual{flex-direction:column;align-items:center;gap:10px;display:flex}.rain-visual{align-items:flex-end;gap:4px;height:100px;display:flex}.problem-trapping-rain-water-visual{--problem-trapping-rain-water-bar:color-mix(in srgb, var(--color-text-primary) 82%, var(--color-accent-primary));--problem-trapping-rain-water-bar-edge:color-mix(in srgb, var(--problem-trapping-rain-water-bar) 76%, #000);--problem-trapping-rain-water-surface:var(--color-bg-secondary);--problem-trapping-rain-water-border:var(--color-border-default);--problem-trapping-rain-water-grid:color-mix(in srgb, var(--color-text-secondary) 22%, transparent);--problem-trapping-rain-water-water:#38bdf8;--problem-trapping-rain-water-water-edge:#0284c7;border:1px solid var(--problem-trapping-rain-water-border);background:var(--problem-trapping-rain-water-surface);width:100%;color:var(--color-text-primary);border-radius:.5rem;margin:1.5rem 0;overflow:hidden}[data-theme=warm] .problem-trapping-rain-water-visual{--problem-trapping-rain-water-bar:#725f4a;--problem-trapping-rain-water-bar-edge:#4d3e30;--problem-trapping-rain-water-surface:#f6f0e8;--problem-trapping-rain-water-border:#d8cbbb;--problem-trapping-rain-water-grid:#6f645742}[data-theme=dark] .problem-trapping-rain-water-visual{--problem-trapping-rain-water-bar:#d4d4d4;--problem-trapping-rain-water-bar-edge:#525252;--problem-trapping-rain-water-surface:#090909;--problem-trapping-rain-water-border:#262626;--problem-trapping-rain-water-grid:#a3a3a34d;--problem-trapping-rain-water-water:#0ea5e9;--problem-trapping-rain-water-water-edge:#7dd3fc}.problem-trapping-rain-water-visual__header{border-bottom:1px solid var(--problem-trapping-rain-water-border);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:.25rem 1rem;padding:1.25rem 1.35rem 1rem;display:grid}.problem-trapping-rain-water-visual__eyebrow{color:var(--problem-trapping-rain-water-water-edge);letter-spacing:.12em;text-transform:uppercase;font-size:.95rem;font-weight:800}.problem-trapping-rain-water-visual__title{font-size:clamp(1.1rem,1.04rem + .3vw,1.3rem);font-weight:750;line-height:1.35}.problem-trapping-rain-water-visual__total{border:1px solid color-mix(in srgb, var(--problem-trapping-rain-water-water-edge) 45%, transparent);background:color-mix(in srgb, var(--problem-trapping-rain-water-water) 13%, transparent);color:var(--color-text-secondary);border-radius:.5rem;grid-area:1/2/span 2;grid-template-columns:auto auto;align-items:center;gap:.1rem .45rem;padding:.55rem .8rem;font-size:.95rem;line-height:1.1;display:grid}.problem-trapping-rain-water-visual__total strong{color:var(--problem-trapping-rain-water-water-edge);font-family:var(--font-mono);grid-row:1/span 2;font-size:1.8rem;line-height:1}.problem-trapping-rain-water-visual__total span{max-width:4.75rem;font-weight:700}.problem-trapping-rain-water-visual__plot{scrollbar-width:thin;padding:.5rem 1rem 0;overflow-x:auto}.problem-trapping-rain-water-visual__plot svg{width:100%;min-width:47.5rem;max-width:52rem;height:auto;margin-inline:auto;display:block}.problem-trapping-rain-water-visual__grid line{stroke:var(--problem-trapping-rain-water-grid);stroke-dasharray:3 7;stroke-width:1px}.problem-trapping-rain-water-visual__axis-labels,.problem-trapping-rain-water-visual__indices{fill:var(--color-text-secondary);font-family:var(--font-mono);text-anchor:middle;font-size:.95rem}.problem-trapping-rain-water-visual__axis-title{fill:var(--color-text-secondary);letter-spacing:.08em;text-transform:uppercase;font-family:inherit;font-size:.95rem;font-weight:700}.problem-trapping-rain-water-visual__bars rect{fill:var(--problem-trapping-rain-water-bar);stroke:var(--problem-trapping-rain-water-bar-edge);stroke-width:1.5px}.problem-trapping-rain-water-visual__bars path{fill:none;stroke:var(--problem-trapping-rain-water-bar);stroke-linecap:round;stroke-width:5px}.problem-trapping-rain-water-visual__water rect{fill:color-mix(in srgb, var(--problem-trapping-rain-water-water) 68%, transparent);stroke:var(--problem-trapping-rain-water-water-edge);stroke-width:1.5px}.problem-trapping-rain-water-visual__legend{border-top:1px solid var(--problem-trapping-rain-water-border);color:var(--color-text-secondary);flex-wrap:wrap;align-items:center;gap:.65rem 1rem;padding:.85rem 1.35rem;font-size:.95rem;font-weight:650;display:flex}.problem-trapping-rain-water-visual__legend>span{align-items:center;gap:.45rem;display:inline-flex}.problem-trapping-rain-water-visual__swatch{border-radius:.22rem;width:.85rem;height:.85rem;display:inline-block}.problem-trapping-rain-water-visual__swatch--bar{background:var(--problem-trapping-rain-water-bar)}.problem-trapping-rain-water-visual__swatch--water{border:1px solid var(--problem-trapping-rain-water-water-edge);background:color-mix(in srgb, var(--problem-trapping-rain-water-water) 68%, transparent)}.problem-trapping-rain-water-visual__calculation{margin-left:auto}.problem-trapping-rain-water-visual__calculation code{border:1px solid color-mix(in srgb, var(--problem-trapping-rain-water-water-edge) 32%, transparent);background:color-mix(in srgb, var(--problem-trapping-rain-water-water) 10%, transparent);color:var(--problem-trapping-rain-water-water-edge);border-radius:.5rem;padding:.35rem .6rem;font-weight:800}.problem-trapping-rain-water-visual__note{color:var(--color-text-secondary);margin:0;padding:0 1.35rem 1.2rem;font-size:.95rem;line-height:1.55}@media (max-width:560px){.problem-trapping-rain-water-visual__header{grid-template-columns:minmax(0,1fr);padding:1rem}.problem-trapping-rain-water-visual__total{grid-area:auto/1;justify-self:start;margin-top:.45rem}.problem-trapping-rain-water-visual__plot{padding-inline:.25rem}.problem-trapping-rain-water-visual__legend{padding-inline:1rem}.problem-trapping-rain-water-visual__calculation{flex-basis:100%;margin-left:0}.problem-trapping-rain-water-visual__note{padding-inline:1rem}}.water{background:var(--rain-water-bg);opacity:.7;width:100%}[data-theme=dark] .water{background:var(--rain-water-bg)}.grid-visual{background:var(--grid-visual-bg);border:2px solid var(--grid-visual-border);grid-template-columns:repeat(5,1fr);gap:2px;display:grid}.cell.land{background:var(--visual-land-bg);color:var(--visual-land-text)}.cell.water{background:var(--visual-water-bg)}.merge-k-sorted-lists-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.merge-k-sorted-lists-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.merge-k-sorted-lists-visual .linked-lists-title,.merge-k-sorted-lists-visual .linked-lists-merge-label{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:600;line-height:1.35}.merge-k-sorted-lists-visual .linked-list-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.merge-k-sorted-lists-visual .list-node{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-width:3rem;min-height:3rem;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;justify-content:center;align-items:center;padding:.55rem .7rem;font-size:1rem;font-weight:700;display:inline-flex}.merge-k-sorted-lists-visual .list-arrow{color:var(--color-text-muted);font-family:var(--font-mono);font-size:1rem;font-weight:700}.merge-k-sorted-lists-visual .linked-list-row-merged{margin-top:.25rem}.merge-k-sorted-lists-visual .list-node-merged{background:var(--example-output-bg);color:var(--example-output-text);border-color:var(--example-border)}.merge-k-sorted-lists-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.word-ladder-visual{flex-direction:column;gap:10px;display:flex}.word-ladder-visual .word-ladder-title{color:var(--text-header);font-weight:700}.word-ladder-visual .word-ladder-track{border:1px solid var(--visual-container-border);background:var(--visual-container-bg);border-radius:10px;flex-wrap:wrap;align-items:center;gap:8px;padding:10px;display:flex}.word-ladder-visual .word-ladder-word{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-width:42px;height:32px;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:999px;justify-content:center;align-items:center;padding:0 8px;font-size:.8rem;font-weight:700;display:inline-flex}.word-ladder-visual .word-ladder-start{border-color:var(--color-accent-secondary);background:var(--color-accent-bg);color:var(--color-accent-text)}.word-ladder-visual .word-ladder-end{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.word-ladder-visual .word-ladder-arrow{color:var(--color-text-muted);font-size:.78rem}.word-ladder-visual .word-ladder-neighbors{flex-wrap:wrap;gap:8px;display:flex}.word-ladder-visual .word-ladder-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:999px;align-items:center;padding:3px 10px;font-size:.76rem;font-weight:700;display:inline-flex}.word-ladder-visual .word-ladder-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.minimum-window-substring-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.minimum-window-substring-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.minimum-window-substring-visual .minimum-window-substring-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.minimum-window-substring-visual .minimum-window-substring-track{border:1px solid var(--visual-container-border);background:var(--visual-container-bg);border-radius:.45rem;flex-wrap:wrap;justify-content:center;gap:.65rem;width:min(100%,52rem);margin:0 auto;padding:.75rem;display:flex}.minimum-window-substring-visual .minimum-window-substring-char{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-width:3rem;min-height:3rem;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.4rem;justify-content:center;align-items:center;font-size:1rem;font-weight:700;display:inline-flex}.minimum-window-substring-visual .minimum-window-substring-hit{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.minimum-window-substring-visual .minimum-window-substring-legend{flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.minimum-window-substring-visual .minimum-window-substring-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:700;display:inline-flex}.minimum-window-substring-visual .minimum-window-substring-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.minimum-window-substring-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-3sum-visual{--problem-3sum-match:#b45309;--problem-3sum-match-bg:#fffbeb;--problem-3sum-match-border:#fcd34d;--problem-3sum-match-text:#78350f;box-sizing:border-box;width:100%;color:var(--color-text-primary);margin:0;padding:0;display:block}[data-theme=warm] .problem-3sum-visual{--visual-container-bg:#faf9f7;--problem-3sum-match:#9a5b13;--problem-3sum-match-bg:#fff4e6;--problem-3sum-match-border:#e8b46a;--problem-3sum-match-text:#6b3a0a}[data-theme=dark] .problem-3sum-visual{--problem-3sum-match:#f59e0b;--problem-3sum-match-bg:#2a1f0d;--problem-3sum-match-border:#8a5a15;--problem-3sum-match-text:#fde68a}.problem-3sum-visual__caption{color:var(--color-text-primary);gap:.3rem;margin:0;display:grid}.problem-3sum-visual__example-divider{border-top:1px dashed var(--example-explanation-border);height:0;margin:1rem 0 0;padding:0}.problem-3sum-visual__eyebrow{color:var(--problem-3sum-match);letter-spacing:.08em;text-transform:uppercase;font-size:.95rem;font-weight:800}.problem-3sum-visual__caption strong{font-size:clamp(1.1rem,1.03rem + .35vw,1.3rem);line-height:1.3}.problem-3sum-visual__caption>span:last-child{color:var(--color-text-secondary);font-size:.95rem;line-height:1.5}.problem-3sum-visual__diagram{margin:1rem 0 0;padding:1rem}.problem-3sum-visual__groups{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:1rem;width:min(100%,58rem);margin:0 auto;display:grid}.problem-3sum-visual__group{min-width:0;min-height:0;margin:0;padding:.95rem;display:block}.problem-3sum-visual__group h3{color:var(--color-text-primary);text-align:center;margin:0 0 .75rem;font-size:1rem;line-height:1.3}.problem-3sum-visual__value-list,.problem-3sum-visual__match-list{flex-wrap:wrap;justify-content:center;gap:.65rem;margin:0;padding:0;list-style:none;display:flex}.problem-3sum-visual__value,.problem-3sum-visual__match{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--color-bg-primary);min-height:2.75rem;color:var(--color-text-primary);font-family:var(--font-family-mono);border-radius:.5rem;justify-content:center;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;line-height:1.25;display:inline-flex}.problem-3sum-visual__match{border-color:var(--problem-3sum-match-border);background:var(--problem-3sum-match-bg);color:var(--problem-3sum-match-text)}.problem-3sum-visual__connector{min-width:7rem;color:var(--problem-3sum-match);letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;align-items:center;gap:.65rem;font-size:.95rem;font-weight:800;display:flex}.problem-3sum-visual__connector:before,.problem-3sum-visual__connector:after{content:"";border-top:1px dashed var(--visual-container-border);flex:auto}@media (max-width:680px){.problem-3sum-visual__groups{grid-template-columns:minmax(0,1fr)}.problem-3sum-visual__connector{justify-self:center;width:min(100%,18rem);min-width:0}}@media (max-width:480px){.problem-3sum-visual__diagram,.problem-3sum-visual__group{padding:.85rem}.problem-3sum-visual__value,.problem-3sum-visual__match{min-height:2.6rem;padding-inline:.65rem}}.problem-task-scheduler-divider{border-top:1px solid #d8cdbd;width:100%;margin:1rem 0 0}[data-theme=warm] .problem-task-scheduler-divider{border-color:#d7b98c}[data-theme=dark] .problem-task-scheduler-divider{border-color:#5b554c}.problem-task-scheduler-visual{--problem-task-scheduler-bg:#f7f1e8;--problem-task-scheduler-border:#d8cdbd;--problem-task-scheduler-text:#332b24;--problem-task-scheduler-muted:#6f6255;--problem-task-scheduler-accent:#7a4d2a;--problem-task-scheduler-accent-bg:#ead8c2;--problem-task-scheduler-accent-border:#bc946b;--problem-task-scheduler-idle-bg:#e3ddd4;--problem-task-scheduler-idle-border:#b8aa9a;box-sizing:border-box;border:1px solid var(--problem-task-scheduler-border);background:var(--problem-task-scheduler-bg);width:100%;color:var(--problem-task-scheduler-text);border-radius:.5rem;flex-direction:column;gap:.85rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-task-scheduler-visual{--problem-task-scheduler-bg:#fbf1df;--problem-task-scheduler-border:#d7b98c;--problem-task-scheduler-text:#3f2d20;--problem-task-scheduler-muted:#755c46;--problem-task-scheduler-accent:#8a4d26;--problem-task-scheduler-accent-bg:#f0d8b6;--problem-task-scheduler-accent-border:#c18a5b;--problem-task-scheduler-idle-bg:#e8ded0;--problem-task-scheduler-idle-border:#b69f86}[data-theme=dark] .problem-task-scheduler-visual{--problem-task-scheduler-bg:#292825;--problem-task-scheduler-border:#5b554c;--problem-task-scheduler-text:#f1eadf;--problem-task-scheduler-muted:#c4b9aa;--problem-task-scheduler-accent:#f0bf80;--problem-task-scheduler-accent-bg:#4a3829;--problem-task-scheduler-accent-border:#98714c;--problem-task-scheduler-idle-bg:#403d38;--problem-task-scheduler-idle-border:#777066}.problem-task-scheduler-visual__title{color:var(--problem-task-scheduler-text);font-size:1.05rem;font-weight:700;line-height:1.35}.problem-task-scheduler-visual__timeline{grid-template-columns:repeat(8,minmax(3rem,1fr));gap:.45rem;width:min(100%,48rem);margin:0 auto;display:grid}.problem-task-scheduler-visual__slot,.problem-task-scheduler-visual__chip{border:1px solid var(--problem-task-scheduler-accent-border);background:var(--problem-task-scheduler-accent-bg);min-height:2.75rem;color:var(--problem-task-scheduler-accent);border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem .65rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-task-scheduler-visual__slot{font-family:var(--font-mono)}.problem-task-scheduler-visual__slot--idle{border-color:var(--problem-task-scheduler-idle-border);background:var(--problem-task-scheduler-idle-bg);color:var(--problem-task-scheduler-muted);font-family:var(--font-sans)}.problem-task-scheduler-visual__legend{flex-wrap:wrap;gap:.6rem;display:flex}.problem-task-scheduler-visual__chip{min-height:2.5rem}.problem-task-scheduler-visual__chip--strong{border-color:var(--problem-task-scheduler-border);color:var(--problem-task-scheduler-text);background:0 0}.problem-task-scheduler-visual__caption{color:var(--problem-task-scheduler-muted);font-size:1rem;line-height:1.55}@media (max-width:768px){.problem-task-scheduler-visual{padding:.85rem}.problem-task-scheduler-visual__timeline{min-width:28rem}}.problem-lru-cache-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-lru-cache-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.5rem);display:block;overflow-x:auto}.problem-lru-cache-title{color:var(--color-text-secondary);text-align:center;margin:0 0 1rem;font-size:1rem;font-weight:700}.problem-lru-cache-entries{grid-template-columns:repeat(2,minmax(8rem,1fr));gap:.75rem;width:100%;max-width:32rem;margin:0 auto;padding:0;list-style:none;display:grid}.problem-lru-cache-entries li{border:1px solid var(--visual-node-border);background:var(--card-bg);min-height:3.5rem;color:var(--color-text-primary);font-family:var(--font-mono);border-radius:.375rem;place-items:center;padding:.85rem .75rem;font-size:.95rem;font-weight:700;display:grid}.problem-lru-cache-note{max-width:32rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}.container-with-most-water-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:1rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.container-with-most-water-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.container-with-most-water-water-title{text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.container-with-most-water-visual__caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.container-with-most-water-visual .container-with-most-water-water-chart{border:1px solid var(--visual-container-border);background:var(--visual-container-bg);border-radius:.45rem;grid-template-columns:repeat(9,minmax(2.5rem,1fr));align-items:end;gap:.75rem;width:min(100%,52rem);min-height:12rem;margin:0 auto;padding:1rem .85rem .75rem;display:grid;overflow-x:auto}.container-with-most-water-visual .container-with-most-water-water-col{justify-content:center;align-items:flex-end;height:10rem;display:flex;position:relative}.container-with-most-water-visual .container-with-most-water-water-fill{height:calc(var(--water-h) * .875rem);background:var(--color-accent-bg);border:1px solid var(--visual-container-border);border-radius:.45rem .45rem 0 0;position:absolute;inset:auto .15rem 1.75rem}.container-with-most-water-visual .container-with-most-water-bar{width:.85rem;height:calc(var(--bar-h) * .875rem);background:var(--code-inline-bg);border:1px solid var(--code-inline-border);border-radius:.35rem .35rem 0 0;position:absolute;bottom:1.75rem}.container-with-most-water-visual .container-with-most-water-col-boundary .container-with-most-water-bar{background:var(--color-accent-primary);border-color:var(--color-accent-secondary)}.container-with-most-water-visual .container-with-most-water-col-label{width:100%;color:var(--color-text-muted);font-family:var(--font-mono);text-align:center;font-size:.95rem;position:absolute;bottom:0}.container-with-most-water-visual .container-with-most-water-water-math{flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.container-with-most-water-visual .container-with-most-water-math-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:600;display:inline-flex}.container-with-most-water-visual .container-with-most-water-math-chip-strong{background:var(--example-output-bg);border-color:var(--example-border);color:var(--example-output-text)}.problem-group-anagrams-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-group-anagrams-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.5rem);display:block;overflow-x:auto}.problem-group-anagrams-title{color:var(--color-text-secondary);text-align:center;margin:0 0 1rem;font-size:1rem;font-weight:700}.problem-group-anagrams-groups{grid-template-columns:repeat(3,minmax(8rem,1fr));gap:.75rem;width:100%;min-width:28rem;max-width:52rem;margin:0 auto;padding:0;list-style:none;display:grid}.problem-group-anagrams-groups li{box-sizing:border-box;border:1px solid var(--visual-node-border);background:var(--card-bg);min-height:3.5rem;color:var(--color-text-primary);font-family:var(--font-mono);text-align:center;border-radius:.375rem;justify-content:center;align-items:center;padding:.85rem .75rem;font-size:.95rem;display:flex}.problem-group-anagrams-note{max-width:52rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}@media (max-width:600px){.problem-group-anagrams-groups{grid-template-columns:1fr;min-width:0}}.problem-find-median-from-data-stream-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-find-median-from-data-stream-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.5rem);display:block;overflow-x:auto}.problem-find-median-from-data-stream-title{color:var(--color-text-secondary);letter-spacing:.02em;text-align:center;margin:0 0 1rem;font-size:1rem;font-weight:700}.problem-find-median-from-data-stream-steps{gap:.75rem;width:100%;min-width:38rem;max-width:58rem;margin:0 auto;padding:0;list-style:none;display:grid}.problem-find-median-from-data-stream-step{border:1px solid var(--visual-container-border);background:var(--card-bg);border-radius:.375rem;grid-template-columns:minmax(8rem,.8fr) minmax(10rem,1fr) minmax(9rem,.9fr);align-items:center;gap:.75rem;padding:.85rem;display:grid}.problem-find-median-from-data-stream-op,.problem-find-median-from-data-stream-state,.problem-find-median-from-data-stream-median{font-family:var(--font-mono);font-size:.95rem}.problem-find-median-from-data-stream-op{color:var(--color-text-secondary);font-weight:700}.problem-find-median-from-data-stream-state{color:var(--color-text-primary)}.problem-find-median-from-data-stream-median{color:var(--highlight-success-text);text-align:right;font-weight:700}.problem-find-median-from-data-stream-caption{max-width:58rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}.problem-merge-intervals-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:1rem 0 0}.problem-merge-intervals-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-height:0;color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;padding:clamp(1rem,2vw,1.5rem);display:block;overflow-x:auto}.problem-merge-intervals-title{color:var(--color-text-secondary);text-align:center;margin:0 0 1rem;font-size:1rem;font-weight:700}.problem-merge-intervals-results{grid-template-columns:repeat(3,minmax(8rem,1fr));gap:.75rem;width:100%;max-width:48rem;margin:0 auto;padding:0;list-style:none;display:grid}.problem-merge-intervals-results li{border:1px solid var(--visual-node-border);background:var(--card-bg);min-height:3.5rem;color:var(--color-text-primary);font-family:var(--font-mono);border-radius:.375rem;place-items:center;padding:.85rem .75rem;font-size:.95rem;font-weight:700;display:grid}.problem-merge-intervals-note{max-width:48rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}@media (max-width:600px){.problem-merge-intervals-results{grid-template-columns:1fr}}.problem-rotate-image-divider{border-top:1px solid #d8cdbd;width:100%;margin:1rem 0 0}[data-theme=warm] .problem-rotate-image-divider{border-color:#d7b98c}[data-theme=dark] .problem-rotate-image-divider{border-color:#5b554c}.problem-rotate-image-visual{--problem-rotate-image-bg:#f7f1e8;--problem-rotate-image-border:#d8cdbd;--problem-rotate-image-text:#332b24;--problem-rotate-image-muted:#6f6255;--problem-rotate-image-accent:#7a4d2a;--problem-rotate-image-accent-bg:#ead8c2;--problem-rotate-image-accent-border:#bc946b;box-sizing:border-box;border:1px solid var(--problem-rotate-image-border);background:var(--problem-rotate-image-bg);width:100%;color:var(--problem-rotate-image-text);border-radius:.5rem;flex-direction:column;gap:.85rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-rotate-image-visual{--problem-rotate-image-bg:#fbf1df;--problem-rotate-image-border:#d7b98c;--problem-rotate-image-text:#3f2d20;--problem-rotate-image-muted:#755c46;--problem-rotate-image-accent:#8a4d26;--problem-rotate-image-accent-bg:#f0d8b6;--problem-rotate-image-accent-border:#c18a5b}[data-theme=dark] .problem-rotate-image-visual{--problem-rotate-image-bg:#292825;--problem-rotate-image-border:#5b554c;--problem-rotate-image-text:#f1eadf;--problem-rotate-image-muted:#c4b9aa;--problem-rotate-image-accent:#f0bf80;--problem-rotate-image-accent-bg:#4a3829;--problem-rotate-image-accent-border:#98714c}.problem-rotate-image-visual__title{color:var(--problem-rotate-image-text);font-size:1.05rem;font-weight:700;line-height:1.35}.problem-rotate-image-visual__matrices{flex-wrap:wrap;justify-content:center;align-items:center;gap:1rem;width:min(100%,48rem);margin:0 auto;display:flex}.problem-rotate-image-visual__matrix-group{flex-direction:column;align-items:center;gap:.5rem;display:flex}.problem-rotate-image-visual__label{color:var(--problem-rotate-image-muted);font-size:1rem;font-weight:700}.problem-rotate-image-visual__matrix{border:1px solid var(--problem-rotate-image-border);background:var(--problem-rotate-image-bg);border-radius:.45rem;grid-template-columns:repeat(3,minmax(2.75rem,1fr));gap:.4rem;padding:.5rem;display:grid}.problem-rotate-image-visual__cell{border:1px solid var(--problem-rotate-image-accent-border);background:var(--problem-rotate-image-accent-bg);min-width:2.75rem;min-height:2.75rem;color:var(--problem-rotate-image-accent);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-rotate-image-visual__arrow{color:var(--problem-rotate-image-muted);font-size:1.2rem;font-weight:700}.problem-rotate-image-visual__caption{color:var(--problem-rotate-image-muted);font-size:1rem;line-height:1.55}@media (max-width:768px){.problem-rotate-image-visual{padding:.85rem}.problem-rotate-image-visual__matrices{justify-content:flex-start}}.maximum-subarray-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.maximum-subarray-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.maximum-subarray-visual .maximum-subarray-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.maximum-subarray-visual .maximum-subarray-array{border:1px solid var(--visual-container-border);background:var(--visual-container-bg);border-radius:.45rem;flex-wrap:wrap;justify-content:center;gap:.65rem;width:min(100%,52rem);margin:0 auto;padding:.75rem;display:flex}.maximum-subarray-visual .maximum-subarray-num{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-width:3rem;min-height:3rem;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.4rem;justify-content:center;align-items:center;padding:.55rem .7rem;font-size:1rem;font-weight:700;display:inline-flex}.maximum-subarray-visual .maximum-subarray-best{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.maximum-subarray-visual .maximum-subarray-result{width:min(100%,52rem);color:var(--text-main);flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;margin:0 auto;font-size:1rem;display:flex}.maximum-subarray-visual .maximum-subarray-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:700;display:inline-flex}.maximum-subarray-visual .maximum-subarray-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.maximum-subarray-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.daily-temperatures-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.daily-temperatures-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.daily-temperatures-visual .daily-temperatures-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.daily-temperatures-visual .daily-temperatures-row{grid-template-columns:repeat(8,minmax(3.25rem,1fr));gap:.65rem;width:min(100%,52rem);margin:0 auto;display:grid;overflow-x:auto}.daily-temperatures-visual .daily-temperatures-cell{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-height:3rem;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;justify-content:center;align-items:center;padding:.55rem .4rem;font-size:1rem;font-weight:700;line-height:1.35;display:inline-flex}.daily-temperatures-visual .daily-temperatures-row-wait .daily-temperatures-cell{background:var(--visual-container-bg);color:var(--text-main)}.daily-temperatures-visual .daily-temperatures-wait{border-color:var(--color-accent-secondary);background:var(--color-accent-bg);color:var(--color-accent-text)}.daily-temperatures-visual .daily-temperatures-none{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.daily-temperatures-visual .daily-temperatures-legend{flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.daily-temperatures-visual .daily-temperatures-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:700;line-height:1.35;display:inline-flex}.daily-temperatures-visual .daily-temperatures-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.daily-temperatures-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-invert-binary-tree-visual{--problem-invert-binary-tree-surface:var(--color-bg-secondary);--problem-invert-binary-tree-panel:var(--color-bg-primary);--problem-invert-binary-tree-border:var(--color-border-default);--problem-invert-binary-tree-node:var(--color-bg-primary);--problem-invert-binary-tree-node-border:color-mix(in srgb, var(--color-text-secondary) 42%, var(--color-border-default));--problem-invert-binary-tree-edge:color-mix(in srgb, var(--color-text-secondary) 58%, transparent);--problem-invert-binary-tree-input:var(--color-accent-primary);--problem-invert-binary-tree-output:var(--color-accent-secondary);border:1px solid var(--problem-invert-binary-tree-border);background:var(--problem-invert-binary-tree-surface);color:var(--color-text-primary);border-radius:.5rem;margin:1rem 0 0;overflow:hidden}[data-theme=warm] .problem-invert-binary-tree-visual{--problem-invert-binary-tree-surface:#f6f0e8;--problem-invert-binary-tree-panel:#fdfaf6;--problem-invert-binary-tree-border:#d8cbbb;--problem-invert-binary-tree-node:#fffaf3;--problem-invert-binary-tree-node-border:#9f8b73;--problem-invert-binary-tree-edge:#8a7660;--problem-invert-binary-tree-input:#79644d;--problem-invert-binary-tree-output:#477258}[data-theme=dark] .problem-invert-binary-tree-visual{--problem-invert-binary-tree-surface:#090909;--problem-invert-binary-tree-panel:#111;--problem-invert-binary-tree-border:#262626;--problem-invert-binary-tree-node:#171717;--problem-invert-binary-tree-node-border:#525252;--problem-invert-binary-tree-edge:#737373;--problem-invert-binary-tree-input:#fbbf24;--problem-invert-binary-tree-output:#fb923c}.problem-invert-binary-tree-visual__example-divider{border-top:1px solid var(--color-border-default);margin:1rem 0}.problem-invert-binary-tree-visual__header{border-bottom:1px solid var(--problem-invert-binary-tree-border);gap:.2rem;padding:1.2rem 1.35rem;display:grid}.problem-invert-binary-tree-visual__eyebrow{color:var(--problem-invert-binary-tree-input);letter-spacing:.11em;text-transform:uppercase;font-size:.95rem;font-weight:800}.problem-invert-binary-tree-visual__header strong{font-size:clamp(1.1rem,1.03rem + .35vw,1.35rem);line-height:1.3}.problem-invert-binary-tree-visual__header>span:last-child{color:var(--color-text-secondary);font-size:.95rem}.problem-invert-binary-tree-visual__comparison{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:1rem;padding:.85rem;display:grid}.problem-invert-binary-tree-visual__panel{border:1px solid var(--problem-invert-binary-tree-border);background:var(--problem-invert-binary-tree-panel);border-radius:.5rem;min-width:0;overflow:hidden}.problem-invert-binary-tree-visual__panel-heading{border-bottom:1px solid var(--problem-invert-binary-tree-border);align-items:center;gap:.7rem;padding:.85rem 1rem;display:flex}.problem-invert-binary-tree-visual__panel-heading>span:last-child{gap:.12rem;display:grid}.problem-invert-binary-tree-visual__panel-heading strong{font-size:.98rem}.problem-invert-binary-tree-visual__panel-heading small{color:var(--color-text-secondary);font-size:.95rem}.problem-invert-binary-tree-visual__stage{border:1px solid color-mix(in srgb, var(--problem-invert-binary-tree-input) 52%, transparent);min-width:3.4rem;color:var(--problem-invert-binary-tree-input);letter-spacing:.05em;text-transform:uppercase;border-radius:.5rem;justify-content:center;align-items:center;padding:.3rem .5rem;font-size:.95rem;font-weight:800;display:inline-flex}.problem-invert-binary-tree-visual__panel--output .problem-invert-binary-tree-visual__stage{border-color:color-mix(in srgb, var(--problem-invert-binary-tree-output) 52%, transparent);color:var(--problem-invert-binary-tree-output)}.problem-invert-binary-tree-visual__canvas{padding:.35rem .65rem}.problem-invert-binary-tree-visual__canvas svg{width:100%;max-width:23rem;height:auto;margin-inline:auto;display:block}.problem-invert-binary-tree-visual__edges line{stroke:var(--problem-invert-binary-tree-edge);stroke-linecap:round;stroke-width:2.5px}.problem-invert-binary-tree-visual__nodes circle{fill:var(--problem-invert-binary-tree-node);stroke:var(--problem-invert-binary-tree-node-border);stroke-width:2px}.problem-invert-binary-tree-visual__nodes text{fill:var(--color-text-primary);font-family:var(--font-mono);text-anchor:middle;font-size:1.05rem;font-weight:800}.problem-invert-binary-tree-visual__panel--output .problem-invert-binary-tree-visual__nodes circle{fill:color-mix(in srgb, var(--problem-invert-binary-tree-output) 11%, var(--problem-invert-binary-tree-node));stroke:var(--problem-invert-binary-tree-output)}.problem-invert-binary-tree-visual__operator{color:var(--color-text-secondary);justify-items:center;gap:.1rem;display:grid}.problem-invert-binary-tree-visual__operator span{font-size:1.6rem;line-height:1}.problem-invert-binary-tree-visual__operator small{letter-spacing:.06em;text-transform:uppercase;font-size:.95rem;font-weight:750}.problem-invert-binary-tree-visual__note{color:var(--color-text-secondary);margin:0;padding:0 1.35rem 1.2rem;font-size:.95rem;line-height:1.55}@media (max-width:820px){.problem-invert-binary-tree-visual__comparison{grid-template-columns:minmax(0,1fr)}.problem-invert-binary-tree-visual__operator{grid-auto-flow:column;justify-content:center;align-items:center;gap:.5rem}.problem-invert-binary-tree-visual__operator span{transform:rotate(90deg)}.problem-invert-binary-tree-visual__canvas svg{max-width:23rem}}@media (max-width:480px){.problem-invert-binary-tree-visual__header,.problem-invert-binary-tree-visual__comparison{padding:.85rem}.problem-invert-binary-tree-visual__panel-heading{align-items:flex-start;padding-inline:.85rem}.problem-invert-binary-tree-visual__note{padding-inline:1rem}}.validate-binary-search-tree-visual{flex-direction:column;gap:8px;display:flex}.validate-binary-search-tree-visual .validate-binary-search-tree-title{color:var(--text-header);font-weight:700}.validate-binary-search-tree-visual .validate-binary-search-tree-tree{border:1px solid var(--visual-container-border);background:var(--visual-container-bg);border-radius:10px;gap:6px;padding:8px;display:grid}.validate-binary-search-tree-visual .validate-binary-search-tree-level{justify-content:center;gap:10px;display:flex}.validate-binary-search-tree-visual .validate-binary-search-tree-level-2{gap:26px}.validate-binary-search-tree-visual .validate-binary-search-tree-node{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);min-width:30px;height:30px;color:var(--code-inline-text);font-family:var(--font-mono);border-radius:999px;justify-content:center;align-items:center;font-size:.78rem;font-weight:700;display:inline-flex}.validate-binary-search-tree-visual .validate-binary-search-tree-rules{flex-wrap:wrap;gap:8px;display:flex}.validate-binary-search-tree-visual .validate-binary-search-tree-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:999px;align-items:center;padding:3px 10px;font-size:.78rem;font-weight:700;display:inline-flex}.validate-binary-search-tree-visual .validate-binary-search-tree-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.binary-tree-level-order-traversal-visual{--binary-tree-level-order-traversal-surface:var(--color-bg-secondary);--binary-tree-level-order-traversal-panel:var(--color-bg-primary);--binary-tree-level-order-traversal-border:var(--color-border-default);--binary-tree-level-order-traversal-node:var(--color-bg-primary);--binary-tree-level-order-traversal-node-border:var(--color-border-muted);--binary-tree-level-order-traversal-accent:#a45716;--binary-tree-level-order-traversal-accent-bg:#f8ead8;--binary-tree-level-order-traversal-accent-border:#d4a065;--binary-tree-level-order-traversal-accent-text:#7b3f0f;box-sizing:border-box;border:1px solid var(--binary-tree-level-order-traversal-border);background:var(--binary-tree-level-order-traversal-surface);width:100%;color:var(--color-text-primary);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:clamp(1rem,2.5vw,1.35rem);display:flex}[data-theme=warm] .binary-tree-level-order-traversal-visual{--binary-tree-level-order-traversal-surface:#f4efe7;--binary-tree-level-order-traversal-panel:#fbf8f2;--binary-tree-level-order-traversal-border:#ded3c4;--binary-tree-level-order-traversal-node:#fffdf8;--binary-tree-level-order-traversal-node-border:#a79580;--binary-tree-level-order-traversal-accent:#936019;--binary-tree-level-order-traversal-accent-bg:#f8e5dc;--binary-tree-level-order-traversal-accent-border:#c9775c;--binary-tree-level-order-traversal-accent-text:#963b27}[data-theme=dark] .binary-tree-level-order-traversal-visual{--binary-tree-level-order-traversal-surface:#0f0f0d;--binary-tree-level-order-traversal-panel:#171613;--binary-tree-level-order-traversal-border:#37312a;--binary-tree-level-order-traversal-node:#1d1b18;--binary-tree-level-order-traversal-node-border:#5d5144;--binary-tree-level-order-traversal-accent:#fbbf24;--binary-tree-level-order-traversal-accent-bg:#2d1d14;--binary-tree-level-order-traversal-accent-border:#b95f33;--binary-tree-level-order-traversal-accent-text:#fb923c}.binary-tree-level-order-traversal-visual__example-divider{border-top:1px dashed var(--example-explanation-border);height:0;margin:1rem 0 0}.binary-tree-level-order-traversal-visual__caption{gap:.45rem;margin:0;display:grid}.binary-tree-level-order-traversal-visual__eyebrow{color:var(--binary-tree-level-order-traversal-accent);letter-spacing:.08em;text-transform:uppercase;font-size:.95rem;font-weight:800}.binary-tree-level-order-traversal-visual__caption strong{font-size:clamp(1.1rem,1.03rem + .35vw,1.3rem);line-height:1.3}.binary-tree-level-order-traversal-visual__caption>span:last-child{max-width:48rem;color:var(--color-text-secondary);font-size:.95rem;line-height:1.5}.binary-tree-level-order-traversal-visual__diagram{box-sizing:border-box;border:1px solid var(--binary-tree-level-order-traversal-border);background:var(--binary-tree-level-order-traversal-panel);border-radius:.5rem;gap:1rem;width:min(100%,54rem);max-width:100%;min-height:0;margin:0 auto;padding:1rem;display:grid}.binary-tree-level-order-traversal-tree{border:1px solid var(--binary-tree-level-order-traversal-border);background:var(--binary-tree-level-order-traversal-surface);border-radius:.5rem;gap:.6rem;padding:1rem;display:grid}.binary-tree-level-order-traversal-level{border-bottom:1px solid var(--binary-tree-level-order-traversal-border);grid-template-columns:minmax(5rem,7rem) minmax(0,1fr);align-items:center;gap:1rem;min-height:4.5rem;padding:.6rem .75rem;display:grid}.binary-tree-level-order-traversal-level:last-child{border-bottom:0}.binary-tree-level-order-traversal-label{color:var(--color-text-secondary);text-align:right;font-size:.95rem;font-weight:700}.binary-tree-level-order-traversal-nodes{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;display:flex}.binary-tree-level-order-traversal-node{border:1px solid var(--binary-tree-level-order-traversal-node-border);background:var(--binary-tree-level-order-traversal-node);width:3.5rem;height:3.5rem;color:var(--color-text-primary);font-family:var(--font-mono);border-radius:50%;justify-content:center;align-items:center;font-size:1rem;font-weight:700;display:inline-flex}.binary-tree-level-order-traversal-groups{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.binary-tree-level-order-traversal-chip{border:1px solid var(--binary-tree-level-order-traversal-border);background:var(--binary-tree-level-order-traversal-surface);min-height:2.5rem;color:var(--color-text-secondary);font-family:var(--font-mono);border-radius:.5rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:700;display:inline-flex}.binary-tree-level-order-traversal-chip-strong{border-color:var(--binary-tree-level-order-traversal-accent-border);background:var(--binary-tree-level-order-traversal-accent-bg);color:var(--binary-tree-level-order-traversal-accent-text)}@media (max-width:768px){.binary-tree-level-order-traversal-visual{padding:1rem}.binary-tree-level-order-traversal-visual__diagram,.binary-tree-level-order-traversal-tree{padding:.85rem}.binary-tree-level-order-traversal-level{grid-template-columns:1fr;gap:.5rem}.binary-tree-level-order-traversal-label{text-align:left}}.problem-clone-graph-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-clone-graph-visual{--problem-clone-graph-bg:#f7f3ec;--problem-clone-graph-border:#c9bda9;--problem-clone-graph-text:#2b241b;--problem-clone-graph-muted:#6b5b49;--problem-clone-graph-accent:#a65f12;--problem-clone-graph-accent-bg:#fff1d6;--problem-clone-graph-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-clone-graph-border);background:var(--problem-clone-graph-bg);width:100%;color:var(--problem-clone-graph-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-clone-graph-visual{--problem-clone-graph-bg:#fffaf2;--problem-clone-graph-border:#d8c2a1;--problem-clone-graph-text:#392819;--problem-clone-graph-muted:#725c43;--problem-clone-graph-accent:#a65f12;--problem-clone-graph-accent-bg:#fff0d1;--problem-clone-graph-accent-border:#d79a43}[data-theme=dark] .problem-clone-graph-visual{--problem-clone-graph-bg:#181512;--problem-clone-graph-border:#514333;--problem-clone-graph-text:#f4eadc;--problem-clone-graph-muted:#c0ad96;--problem-clone-graph-accent:#f0b35b;--problem-clone-graph-accent-bg:#302314;--problem-clone-graph-accent-border:#94631e}.problem-clone-graph-visual__title{color:var(--problem-clone-graph-text);font-size:1.1rem;font-weight:800}.problem-clone-graph-visual__graphs{box-sizing:border-box;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:1rem;width:min(100%,62rem);margin:0 auto;display:grid}.problem-clone-graph-visual__graph-box{box-sizing:border-box;border:1px solid var(--problem-clone-graph-border);background:var(--problem-clone-graph-bg);border-radius:.5rem;width:min(100%,18rem);margin:0 auto;padding:1rem}.problem-clone-graph-visual__graph-box--clone{border-color:var(--problem-clone-graph-accent-border)}.problem-clone-graph-visual__graph-label{color:var(--problem-clone-graph-muted);letter-spacing:.04em;text-align:center;text-transform:uppercase;margin-bottom:.75rem;font-size:1rem;font-weight:800}.problem-clone-graph-visual__graph-box svg{width:min(100%,15rem);height:auto;margin:0 auto;display:block}.problem-clone-graph-visual__edge{stroke:var(--problem-clone-graph-border);stroke-width:2.5px}.problem-clone-graph-visual__node{fill:var(--problem-clone-graph-accent-bg);stroke:var(--problem-clone-graph-accent-border);stroke-width:1.5px}.problem-clone-graph-visual__node--clone{fill:var(--problem-clone-graph-bg);stroke:var(--problem-clone-graph-accent)}.problem-clone-graph-visual__text{fill:var(--problem-clone-graph-text);font-family:var(--font-mono);font-size:1rem;font-weight:800}.problem-clone-graph-visual__text--clone{fill:var(--problem-clone-graph-accent)}.problem-clone-graph-visual__connector{border:1px solid var(--problem-clone-graph-accent-border);background:var(--problem-clone-graph-accent-bg);color:var(--problem-clone-graph-accent);text-align:center;white-space:nowrap;border-radius:.35rem;padding:.5rem .75rem;font-size:1rem;font-weight:800}.problem-clone-graph-visual__legend{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.problem-clone-graph-visual__chip{border:1px solid var(--problem-clone-graph-border);background:var(--problem-clone-graph-bg);color:var(--problem-clone-graph-text);font-family:var(--font-mono);border-radius:.35rem;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-clone-graph-visual figcaption{width:min(100%,62rem);color:var(--problem-clone-graph-muted);margin:0 auto;font-size:1rem;line-height:1.55}.house-robber-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.house-robber-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.house-robber-visual .house-robber-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.house-robber-visual .house-robber-houses{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.house-robber-visual .house-robber-house{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);border-radius:.45rem;flex-direction:column;align-items:center;gap:2px;min-width:4rem;min-height:4rem;padding:.75rem;display:flex}.house-robber-visual .house-robber-picked{border-color:var(--example-border);background:var(--example-output-bg)}.house-robber-visual .house-robber-idx{font-family:var(--font-mono);color:var(--color-text-muted);font-size:.95rem;font-weight:700}.house-robber-visual .house-robber-money{font-family:var(--font-mono);color:var(--code-inline-text);font-size:.95rem;font-weight:700}.house-robber-visual .house-robber-picked .house-robber-money{color:var(--example-output-text)}.house-robber-visual .house-robber-gap{border:1px solid var(--edge-case-border);background:var(--edge-case-bg);width:2.5rem;height:2.5rem;color:var(--edge-case-icon-color);border-radius:.4rem;justify-content:center;align-items:center;font-size:.95rem;display:inline-flex}.house-robber-visual .house-robber-states{flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.house-robber-visual .house-robber-chip{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);font-family:var(--font-mono);border-radius:.45rem;align-items:center;padding:.55rem .75rem;font-size:.95rem;font-weight:700;display:inline-flex}.house-robber-visual .house-robber-chip strong{color:inherit}.house-robber-visual .house-robber-chip-strong{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.house-robber-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-unique-paths-divider{border-top:1px solid #d8cdbd;width:100%;margin:1rem 0 0}[data-theme=warm] .problem-unique-paths-divider{border-color:#d7b98c}[data-theme=dark] .problem-unique-paths-divider{border-color:#5b554c}.problem-unique-paths-visual{--problem-unique-paths-bg:#f7f1e8;--problem-unique-paths-border:#d8cdbd;--problem-unique-paths-text:#332b24;--problem-unique-paths-muted:#6f6255;--problem-unique-paths-accent:#7a4d2a;--problem-unique-paths-accent-bg:#ead8c2;--problem-unique-paths-accent-border:#bc946b;box-sizing:border-box;border:1px solid var(--problem-unique-paths-border);background:var(--problem-unique-paths-bg);width:100%;color:var(--problem-unique-paths-text);border-radius:.5rem;flex-direction:column;gap:.85rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-unique-paths-visual{--problem-unique-paths-bg:#fbf1df;--problem-unique-paths-border:#d7b98c;--problem-unique-paths-text:#3f2d20;--problem-unique-paths-muted:#755c46;--problem-unique-paths-accent:#8a4d26;--problem-unique-paths-accent-bg:#f0d8b6;--problem-unique-paths-accent-border:#c18a5b}[data-theme=dark] .problem-unique-paths-visual{--problem-unique-paths-bg:#292825;--problem-unique-paths-border:#5b554c;--problem-unique-paths-text:#f1eadf;--problem-unique-paths-muted:#c4b9aa;--problem-unique-paths-accent:#f0bf80;--problem-unique-paths-accent-bg:#4a3829;--problem-unique-paths-accent-border:#98714c}.problem-unique-paths-visual__title{color:var(--problem-unique-paths-text);font-size:1.05rem;font-weight:700;line-height:1.35}.problem-unique-paths-visual__grid{grid-template-columns:repeat(7,minmax(2.25rem,1fr));gap:.4rem;width:min(100%,42rem);margin:0 auto;display:grid}.problem-unique-paths-visual__cell{border:1px solid var(--problem-unique-paths-border);min-height:2.75rem;color:var(--problem-unique-paths-muted);background:0 0;border-radius:.35rem;justify-content:center;align-items:center;padding:.35rem;font-size:1rem;line-height:1.2;display:inline-flex}.problem-unique-paths-visual__cell--start,.problem-unique-paths-visual__cell--goal{border-color:var(--problem-unique-paths-accent-border);background:var(--problem-unique-paths-accent-bg);color:var(--problem-unique-paths-accent);font-weight:700}.problem-unique-paths-visual__caption{color:var(--problem-unique-paths-muted);font-size:1rem;line-height:1.55}@media (max-width:768px){.problem-unique-paths-visual{padding:.85rem}.problem-unique-paths-visual__grid{gap:.3rem}}.problem-fruit-baskets-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-width:0;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.problem-fruit-baskets-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.problem-fruit-baskets-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.problem-two-sum-divider{border:0;border-top:1px solid var(--visual-container-border);width:100%;margin:.25rem 0 0}.problem-two-sum-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;min-width:0;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.problem-two-sum-title{color:var(--color-text-primary);text-align:center;margin:0;font-size:1.05rem;font-weight:700;line-height:1.35}.problem-two-sum-array{box-sizing:border-box;grid-template-columns:minmax(6.5rem,1fr) auto minmax(6.5rem,1fr) auto minmax(6.5rem,1fr);align-items:center;gap:.75rem;width:min(100%,34rem);margin:0 auto;padding:.5rem;display:grid}.problem-two-sum-cell{border:1px solid var(--visual-node-border);background:var(--visual-container-bg);min-width:0;color:var(--color-text-primary);text-align:center;border-radius:.5rem;display:grid;overflow:hidden}.problem-two-sum-index{border-top:1px solid var(--visual-node-border);background:var(--visual-node-bg);color:var(--color-text-secondary);padding:.55rem .75rem;font-size:.95rem;line-height:1.3;display:block}.problem-two-sum-index strong{color:var(--color-text-primary);font-size:inherit}.problem-two-sum-value{color:var(--color-text-primary);padding:1rem 1.25rem;font-size:1.15rem;font-weight:700;display:block}.problem-two-sum-operator{color:var(--color-text-secondary);font-size:1rem}.problem-two-sum-target{border-color:var(--example-border)}.problem-two-sum-note{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-fruit-baskets-track{box-sizing:border-box;flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);min-width:0;margin:0 auto;padding:.15rem .4rem;display:flex;overflow:visible}.problem-fruit-baskets-tree{border:1px solid var(--visual-node-border);background:var(--visual-node-bg);width:5rem;min-width:0;color:var(--color-text-primary);text-align:center;border-radius:.5rem;flex:0 0 5rem;display:grid;overflow:hidden}.problem-fruit-baskets-tree-in{border-color:var(--example-border);background:var(--example-output-bg);color:var(--example-output-text)}.problem-fruit-baskets-tree-out{opacity:.48}.problem-fruit-baskets-index{border-top:1px solid var(--visual-node-border);background:var(--tag-bg);color:var(--tag-text);white-space:nowrap;padding:.4rem .45rem;font-size:.95rem;line-height:1.3;display:block}.problem-fruit-baskets-index strong{color:var(--color-text-primary);font-size:inherit}.problem-fruit-baskets-fruit{justify-content:center;align-items:center;min-height:3rem;padding:.5rem;font-size:1.1rem;font-weight:700;display:flex}.problem-fruit-baskets-window{border-left:3px solid var(--accent);width:-moz-fit-content;width:fit-content;color:var(--text-secondary);margin:0 auto;padding:.55rem .75rem;font-size:.95rem;font-weight:600}.problem-fruit-baskets-baskets{flex-wrap:wrap;justify-content:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.problem-fruit-baskets-baskets span{border:1px solid var(--code-inline-border);background:var(--code-inline-bg);color:var(--code-inline-text);border-radius:.45rem;padding:.55rem .75rem;font-size:.95rem;font-weight:600}.problem-fruit-baskets-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-asteroid-collision-visual{--problem-asteroid-collision-surface:var(--color-bg-secondary);--problem-asteroid-collision-panel:var(--color-bg-primary);--problem-asteroid-collision-border:var(--color-border-default);--problem-asteroid-collision-node:var(--color-bg-primary);--problem-asteroid-collision-node-border:var(--color-border-muted);--problem-asteroid-collision-direction:#b45309;--problem-asteroid-collision-incoming-bg:#fce8e0;--problem-asteroid-collision-incoming-border:#d26a50;--problem-asteroid-collision-incoming-text:#9f2d1f;--problem-asteroid-collision-impact:#9a3412;box-sizing:border-box;border:1px solid var(--problem-asteroid-collision-border);background:var(--problem-asteroid-collision-surface);width:100%;color:var(--color-text-primary);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:clamp(1rem,2.5vw,1.35rem);display:flex}[data-theme=warm] .problem-asteroid-collision-visual{--problem-asteroid-collision-surface:#f4efe7;--problem-asteroid-collision-panel:#fbf8f2;--problem-asteroid-collision-border:#ded3c4;--problem-asteroid-collision-node:#fffdf8;--problem-asteroid-collision-node-border:#a79580;--problem-asteroid-collision-direction:#936019;--problem-asteroid-collision-incoming-bg:#f8e5dc;--problem-asteroid-collision-incoming-border:#c9775c;--problem-asteroid-collision-incoming-text:#963b27;--problem-asteroid-collision-impact:#8d4c14}[data-theme=dark] .problem-asteroid-collision-visual{--problem-asteroid-collision-surface:#0f0f0d;--problem-asteroid-collision-panel:#171613;--problem-asteroid-collision-border:#37312a;--problem-asteroid-collision-node:#1d1b18;--problem-asteroid-collision-node-border:#5d5144;--problem-asteroid-collision-direction:#fbbf24;--problem-asteroid-collision-incoming-bg:#2d1d14;--problem-asteroid-collision-incoming-border:#b95f33;--problem-asteroid-collision-incoming-text:#fb923c;--problem-asteroid-collision-impact:#f59e0b}.problem-asteroid-collision-visual__example-divider{border-top:1px dashed var(--example-explanation-border);height:0;margin:1rem 0 0}.problem-asteroid-collision-visual__caption{text-align:center;gap:.45rem;margin:0;display:grid}.problem-asteroid-collision-visual__eyebrow{color:var(--problem-asteroid-collision-direction);letter-spacing:.08em;text-transform:uppercase;font-size:.95rem;font-weight:800}.problem-asteroid-collision-visual__caption strong{font-size:clamp(1.1rem,1.03rem + .35vw,1.3rem);line-height:1.3}.problem-asteroid-collision-visual__caption>span:last-child{max-width:48rem;color:var(--color-text-secondary);margin-inline:auto;font-size:.95rem;line-height:1.5}.problem-asteroid-collision-visual__diagram{box-sizing:border-box;border:1px solid var(--problem-asteroid-collision-border);background:var(--problem-asteroid-collision-panel);border-radius:.5rem;flex-direction:column;align-items:stretch;gap:1rem;width:min(100%,54rem);max-width:100%;min-height:0;margin:0 auto;padding:1rem;display:flex}.problem-asteroid-collision-stage{box-sizing:border-box;border:1px solid var(--problem-asteroid-collision-border);background:var(--problem-asteroid-collision-surface);border-radius:.5rem;flex-wrap:wrap;justify-content:center;align-items:center;gap:1rem;width:100%;min-height:5.5rem;padding:1rem;display:flex}.problem-asteroid-collision-rock{box-sizing:border-box;border:1px solid var(--problem-asteroid-collision-node-border);background:var(--problem-asteroid-collision-node);min-width:4.5rem;min-height:3.5rem;color:var(--text-header);border-radius:50%;justify-content:center;align-items:center;gap:.35rem;padding:.75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-asteroid-collision-rock-large{min-width:5rem;min-height:4rem}.problem-asteroid-collision-rock-incoming{border-color:var(--problem-asteroid-collision-incoming-border);background:var(--problem-asteroid-collision-incoming-bg);color:var(--problem-asteroid-collision-incoming-text)}.problem-asteroid-collision-impact{border:1px solid var(--problem-asteroid-collision-border);color:var(--problem-asteroid-collision-impact);text-transform:uppercase;letter-spacing:.04em;border-radius:.5rem;padding:.4rem .6rem;font-size:.95rem;font-weight:700}.problem-asteroid-collision-flow{width:100%;color:var(--text-secondary);text-align:center;flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;font-size:.95rem;line-height:1.45;display:flex}.problem-asteroid-collision-flow strong{color:var(--problem-asteroid-collision-direction)}@media (max-width:768px){.problem-asteroid-collision-visual{padding:1rem}.problem-asteroid-collision-visual__diagram{padding:.85rem}.problem-asteroid-collision-stage{flex-wrap:nowrap;justify-content:flex-start;gap:.75rem;padding:.85rem;overflow-x:auto}.problem-asteroid-collision-flow{gap:.65rem}}.problem-remove-nth-node-from-end-of-list-divider{border-top:1px solid #d8cdbd;width:100%;margin:1rem 0 0}[data-theme=warm] .problem-remove-nth-node-from-end-of-list-divider{border-color:#d7b98c}[data-theme=dark] .problem-remove-nth-node-from-end-of-list-divider{border-color:#5b554c}.problem-remove-nth-node-from-end-of-list-visual{--problem-remove-nth-list-bg:#f7f1e8;--problem-remove-nth-list-border:#d8cdbd;--problem-remove-nth-list-text:#332b24;--problem-remove-nth-list-muted:#6f6255;--problem-remove-nth-list-accent:#7a4d2a;--problem-remove-nth-list-accent-bg:#ead8c2;--problem-remove-nth-list-accent-border:#bc946b;box-sizing:border-box;border:1px solid var(--problem-remove-nth-list-border);background:var(--problem-remove-nth-list-bg);width:100%;color:var(--problem-remove-nth-list-text);border-radius:.5rem;flex-direction:column;gap:.85rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-remove-nth-node-from-end-of-list-visual{--problem-remove-nth-list-bg:#fbf1df;--problem-remove-nth-list-border:#d7b98c;--problem-remove-nth-list-text:#3f2d20;--problem-remove-nth-list-muted:#755c46;--problem-remove-nth-list-accent:#8a4d26;--problem-remove-nth-list-accent-bg:#f0d8b6;--problem-remove-nth-list-accent-border:#c18a5b}[data-theme=dark] .problem-remove-nth-node-from-end-of-list-visual{--problem-remove-nth-list-bg:#292825;--problem-remove-nth-list-border:#5b554c;--problem-remove-nth-list-text:#f1eadf;--problem-remove-nth-list-muted:#c4b9aa;--problem-remove-nth-list-accent:#f0bf80;--problem-remove-nth-list-accent-bg:#4a3829;--problem-remove-nth-list-accent-border:#98714c}.problem-remove-nth-node-from-end-of-list-visual__title{color:var(--problem-remove-nth-list-text);font-size:1.05rem;font-weight:700;line-height:1.35}.problem-remove-nth-node-from-end-of-list-visual__lists{flex-direction:column;gap:.6rem;width:min(100%,52rem);margin:0 auto;display:flex}.problem-remove-nth-node-from-end-of-list-visual__list{grid-template-columns:minmax(4.5rem,5.5rem) minmax(0,32rem);justify-content:center;align-items:center;gap:1rem;width:100%;min-width:0;display:grid}.problem-remove-nth-node-from-end-of-list-visual__label{min-width:5rem;min-height:2.5rem;color:var(--problem-remove-nth-list-muted);text-align:right;justify-content:flex-end;align-items:center;font-size:1rem;font-weight:700;display:inline-flex}.problem-remove-nth-node-from-end-of-list-visual__chain{justify-content:center;align-items:center;gap:.45rem;min-width:max-content;display:flex}.problem-remove-nth-node-from-end-of-list-visual__node{border:1px solid var(--problem-remove-nth-list-accent-border);background:var(--problem-remove-nth-list-accent-bg);min-width:2.5rem;min-height:2.5rem;color:var(--problem-remove-nth-list-accent);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem .65rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-remove-nth-node-from-end-of-list-visual__arrow{color:var(--problem-remove-nth-list-muted);font-size:1.1rem;line-height:1}.problem-remove-nth-node-from-end-of-list-visual__caption{color:var(--problem-remove-nth-list-muted);font-size:1rem;line-height:1.55}@media (max-width:768px){.problem-remove-nth-node-from-end-of-list-visual{padding:.85rem}.problem-remove-nth-node-from-end-of-list-visual__lists{overflow-x:auto}.problem-remove-nth-node-from-end-of-list-visual__list{grid-template-columns:minmax(4.5rem,5.5rem) minmax(28rem,1fr);width:max-content;min-width:100%}}.problem-counting-bits-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.problem-counting-bits-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.problem-counting-bits-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.problem-counting-bits-caption{color:var(--color-text-secondary);text-align:center;margin:0;font-size:.95rem;line-height:1.5}.problem-find-duplicate-visual{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--visual-container-bg);width:100%;color:var(--color-text-primary);border-radius:.5rem;gap:.85rem;margin:0;padding:clamp(1rem,2vw,1.35rem);display:grid}.problem-find-duplicate-visual__divider{border-top:1px solid var(--visual-container-border);width:100%;margin-top:1rem}.problem-find-duplicate-title{color:var(--color-text-primary);text-align:center;font-size:1.05rem;font-weight:700;line-height:1.35}.problem-sort-colors-divider{border-top:1px solid #d8cdbd;width:100%;margin:1rem 0 0}[data-theme=warm] .problem-sort-colors-divider{border-color:#d7b98c}[data-theme=dark] .problem-sort-colors-divider{border-color:#5b554c}.problem-sort-colors-visual{--problem-sort-colors-bg:#f7f1e8;--problem-sort-colors-border:#d8cdbd;--problem-sort-colors-text:#332b24;--problem-sort-colors-muted:#6f6255;--problem-sort-colors-zero-bg:#ead8c2;--problem-sort-colors-zero-border:#bc946b;--problem-sort-colors-zero-text:#6b3f1c;--problem-sort-colors-one-bg:#e3ddd4;--problem-sort-colors-one-border:#b8aa9a;--problem-sort-colors-one-text:#4f4438;--problem-sort-colors-two-bg:#e6c0a9;--problem-sort-colors-two-border:#bd7654;--problem-sort-colors-two-text:#71351f;box-sizing:border-box;border:1px solid var(--problem-sort-colors-border);background:var(--problem-sort-colors-bg);width:100%;color:var(--problem-sort-colors-text);border-radius:.5rem;flex-direction:column;gap:.85rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-sort-colors-visual{--problem-sort-colors-bg:#fbf1df;--problem-sort-colors-border:#d7b98c;--problem-sort-colors-text:#3f2d20;--problem-sort-colors-muted:#755c46;--problem-sort-colors-zero-bg:#f0d8b6;--problem-sort-colors-zero-border:#c18a5b;--problem-sort-colors-zero-text:#75401f;--problem-sort-colors-one-bg:#e8ded0;--problem-sort-colors-one-border:#b69f86;--problem-sort-colors-one-text:#594536;--problem-sort-colors-two-bg:#edc4a9;--problem-sort-colors-two-border:#c07a55;--problem-sort-colors-two-text:#71351f}[data-theme=dark] .problem-sort-colors-visual{--problem-sort-colors-bg:#292825;--problem-sort-colors-border:#5b554c;--problem-sort-colors-text:#f1eadf;--problem-sort-colors-muted:#c4b9aa;--problem-sort-colors-zero-bg:#4a3829;--problem-sort-colors-zero-border:#98714c;--problem-sort-colors-zero-text:#f0bf80;--problem-sort-colors-one-bg:#403d38;--problem-sort-colors-one-border:#777066;--problem-sort-colors-one-text:#d0c7bb;--problem-sort-colors-two-bg:#57372d;--problem-sort-colors-two-border:#a66e57;--problem-sort-colors-two-text:#f0b193}.problem-sort-colors-title{color:var(--problem-sort-colors-text);font-size:1.05rem;font-weight:700;line-height:1.35}.problem-sort-colors-row{grid-template-columns:repeat(6,minmax(2.75rem,1fr));gap:.45rem;width:min(100%,36rem);margin:0 auto;display:grid}.problem-sort-colors-cell{border:1px solid var(--problem-sort-colors-border);min-height:2.75rem;font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;font-size:1rem;font-weight:700;display:inline-flex}.problem-sort-colors-cell--zero{border-color:var(--problem-sort-colors-zero-border);background:var(--problem-sort-colors-zero-bg);color:var(--problem-sort-colors-zero-text)}.problem-sort-colors-cell--one{border-color:var(--problem-sort-colors-one-border);background:var(--problem-sort-colors-one-bg);color:var(--problem-sort-colors-one-text)}.problem-sort-colors-cell--two{border-color:var(--problem-sort-colors-two-border);background:var(--problem-sort-colors-two-bg);color:var(--problem-sort-colors-two-text)}.problem-sort-colors-labels{color:var(--problem-sort-colors-muted);font-size:1rem;line-height:1.55}@media (max-width:768px){.problem-sort-colors-visual{padding:.85rem}.problem-sort-colors-row{gap:.35rem}}.problem-largest-number-divider{border:0;border-top:1px solid 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.75rem;font-size:.95rem;font-weight:700;display:grid}.problem-largest-number-result{max-width:52rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}.problem-largest-number-result span{color:var(--highlight-success-text);font-family:var(--font-mono);font-size:1rem;font-weight:700}@media (max-width:600px){.problem-largest-number-order{grid-template-columns:repeat(2,minmax(8rem,1fr));min-width:0}}.problem-find-duplicate-map{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;width:min(100%,42rem);margin:0 auto;display:flex}.problem-find-duplicate-map span,.problem-find-duplicate-map strong{border:1px solid var(--visual-node-border);background:var(--visual-node-bg);min-width:3rem;min-height:3rem;color:var(--color-text-primary);font-family:var(--font-mono);border-radius:.45rem;justify-content:center;align-items:center;padding:.55rem 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.75rem;font-size:.95rem;display:flex}.problem-design-twitter-tweet{color:var(--color-text-primary);font-family:var(--font-mono);font-size:.95rem}.problem-design-twitter-feed{box-sizing:border-box;border:1px solid var(--visual-container-border);background:var(--card-bg);border-radius:.375rem;width:100%;max-width:48rem;margin:1rem auto 0;padding:.85rem}.problem-design-twitter-feed-title{color:var(--color-text-secondary);text-align:center;margin:0 0 .75rem;font-size:.95rem;font-weight:700}.problem-design-twitter-feed-list{grid-template-columns:repeat(2,minmax(10rem,1fr));gap:.75rem;margin:0;padding:0;list-style:none;display:grid}.problem-design-twitter-feed-item{border:1px solid var(--visual-node-border);color:var(--color-text-primary);font-family:var(--font-mono);text-align:center;border-radius:.375rem;padding:.85rem .75rem;font-size:.95rem}.problem-design-twitter-note{max-width:48rem;color:var(--color-text-secondary);text-align:center;margin:1rem auto 0;font-size:.95rem;line-height:1.5}@media (max-width:600px){.problem-time-based-key-value-store-timeline{justify-content:flex-start;min-width:0;overflow-x:auto}.problem-design-twitter-streams,.problem-design-twitter-feed-list{grid-template-columns:1fr}}.problem-course-schedule-ii-visual{--problem-course-schedule-ii-bg:#f7f3ec;--problem-course-schedule-ii-border:#c9bda9;--problem-course-schedule-ii-text:#2b241b;--problem-course-schedule-ii-muted:#6b5b49;--problem-course-schedule-ii-accent:#a65f12;--problem-course-schedule-ii-accent-bg:#fff1d6;--problem-course-schedule-ii-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-course-schedule-ii-border);background:var(--problem-course-schedule-ii-bg);width:100%;color:var(--problem-course-schedule-ii-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] 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0}.problem-binary-tree-right-side-view-visual{--problem-binary-tree-right-side-view-surface:#fbf8f3;--problem-binary-tree-right-side-view-surface-muted:#f3eee7;--problem-binary-tree-right-side-view-border:#d8cec1;--problem-binary-tree-right-side-view-accent:#a35319;--problem-binary-tree-right-side-view-accent-bg:#fff1df;--problem-binary-tree-right-side-view-accent-border:#e3b177;--problem-binary-tree-right-side-view-accent-text:#71340e;box-sizing:border-box;border:1px solid var(--problem-binary-tree-right-side-view-border);background:var(--problem-binary-tree-right-side-view-surface);width:100%;color:var(--color-text-primary);border-radius:.5rem;margin:.9rem 0 0;padding:clamp(1rem,2.5vw,1.35rem);display:block;overflow:hidden}[data-theme=warm] 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strong{min-width:7rem;color:var(--color-text-secondary);text-align:right;font-size:.95rem;line-height:1.35}.problem-binary-tree-right-side-view-visual__node{border:1px solid var(--problem-binary-tree-right-side-view-border);background:var(--problem-binary-tree-right-side-view-surface-muted);width:3rem;height:3rem;color:var(--color-text-primary);font-family:var(--font-mono);border-radius:50%;justify-content:center;align-items:center;font-size:1.05rem;font-weight:800;display:inline-flex}.problem-binary-tree-right-side-view-visual__node--visible{border-color:var(--problem-binary-tree-right-side-view-accent-border);background:var(--problem-binary-tree-right-side-view-accent-bg);color:var(--problem-binary-tree-right-side-view-accent-text)}@media (max-width:600px){.problem-binary-tree-right-side-view-visual__caption{text-align:left}.problem-binary-tree-right-side-view-visual__level{justify-content:flex-start}.problem-binary-tree-right-side-view-visual__level strong{text-align:left;min-width:5.5rem}}.problem-minimum-number-of-arrows-to-burst-balloons-visual{--problem-arrows-bg:#f7f3ec;--problem-arrows-border:#c9bda9;--problem-arrows-text:#2b241b;--problem-arrows-muted:#6b5b49;--problem-arrows-accent:#a65f12;--problem-arrows-accent-bg:#fff1d6;--problem-arrows-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-arrows-border);background:var(--problem-arrows-bg);width:100%;color:var(--problem-arrows-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-minimum-number-of-arrows-to-burst-balloons-visual{--problem-arrows-bg:#fffaf2;--problem-arrows-border:#d8c2a1;--problem-arrows-text:#392819;--problem-arrows-muted:#725c43;--problem-arrows-accent:#a65f12;--problem-arrows-accent-bg:#fff0d1;--problem-arrows-accent-border:#d79a43}[data-theme=dark] 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var(--problem-arrows-border);background:var(--problem-arrows-bg);min-height:2.5rem;color:var(--problem-arrows-text);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-minimum-number-of-arrows-to-burst-balloons-visual__interval--active,.problem-minimum-number-of-arrows-to-burst-balloons-visual__arrow{border-color:var(--problem-arrows-accent-border);background:var(--problem-arrows-accent-bg);color:var(--problem-arrows-accent)}.problem-minimum-number-of-arrows-to-burst-balloons-visual figcaption{width:min(100%,46rem);color:var(--problem-arrows-muted);margin:0 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var(--visual-container-border);height:0;margin:1rem 0 0}.problem-meeting-rooms-ii-visual{--problem-meeting-bg:#f7f3ec;--problem-meeting-border:#c9bda9;--problem-meeting-text:#2b241b;--problem-meeting-muted:#6b5b49;--problem-meeting-accent:#a65f12;--problem-meeting-accent-bg:#fff1d6;--problem-meeting-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-meeting-border);background:var(--problem-meeting-bg);width:100%;color:var(--problem-meeting-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-meeting-rooms-ii-visual{--problem-meeting-bg:#fffaf2;--problem-meeting-border:#d8c2a1;--problem-meeting-text:#392819;--problem-meeting-muted:#725c43;--problem-meeting-accent:#a65f12;--problem-meeting-accent-bg:#fff0d1;--problem-meeting-accent-border:#d79a43}[data-theme=dark] 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var(--problem-meeting-border);background:var(--problem-meeting-bg);min-width:4rem;min-height:2.5rem;color:var(--problem-meeting-text);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;padding:0 .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-meeting-rooms-ii-visual__block--long{border-color:var(--problem-meeting-accent-border);background:var(--problem-meeting-accent-bg);min-width:8rem}.problem-meeting-rooms-ii-visual__legend{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.problem-meeting-rooms-ii-visual__chip{border:1px solid var(--problem-meeting-border);background:var(--problem-meeting-bg);color:var(--problem-meeting-text);font-family:var(--font-mono);border-radius:.35rem;align-items:center;padding:.5rem 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1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-lowest-common-ancestor-visual{--problem-lca-bg:#fffaf2;--problem-lca-border:#d8c2a1;--problem-lca-text:#392819;--problem-lca-muted:#725c43;--problem-lca-accent:#a65f12;--problem-lca-accent-bg:#fff0d1;--problem-lca-accent-border:#d79a43}[data-theme=dark] .problem-lowest-common-ancestor-visual{--problem-lca-bg:#181512;--problem-lca-border:#514333;--problem-lca-text:#f4eadc;--problem-lca-muted:#c0ad96;--problem-lca-accent:#f0b35b;--problem-lca-accent-bg:#302314;--problem-lca-accent-border:#94631e}.problem-lowest-common-ancestor-visual__title{color:var(--problem-lca-text);font-size:1.1rem;font-weight:800}.problem-lowest-common-ancestor-visual__canvas{box-sizing:border-box;border:1px solid var(--problem-lca-border);background:var(--problem-lca-bg);border-radius:.5rem;width:min(100%,42rem);margin:0 auto;padding:.75rem}.problem-lowest-common-ancestor-visual__canvas svg{width:100%;height:auto;display:block}.problem-lowest-common-ancestor-visual__edge{stroke:var(--problem-lca-border);stroke-width:2.5px}.problem-lowest-common-ancestor-visual__edge--highlight{stroke:var(--problem-lca-accent);stroke-width:4px}.problem-lowest-common-ancestor-visual__node{fill:var(--problem-lca-bg);stroke:var(--problem-lca-border);stroke-width:1.5px}.problem-lowest-common-ancestor-visual__node--target{fill:var(--problem-lca-accent-bg);stroke:var(--problem-lca-accent-border)}.problem-lowest-common-ancestor-visual__node--lca{fill:var(--problem-lca-accent);stroke:var(--problem-lca-accent-border)}.problem-lowest-common-ancestor-visual__node-text{fill:var(--problem-lca-text);font-family:var(--font-mono);font-size:1rem;font-weight:800}.problem-lowest-common-ancestor-visual__node-text--strong{fill:var(--problem-lca-bg)}.problem-lowest-common-ancestor-visual__legend{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.problem-lowest-common-ancestor-visual__chip{border:1px solid var(--problem-lca-border);background:var(--problem-lca-bg);color:var(--problem-lca-text);font-family:var(--font-mono);border-radius:.35rem;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-lowest-common-ancestor-visual__chip--target{border-color:var(--problem-lca-accent-border);background:var(--problem-lca-accent-bg);color:var(--problem-lca-accent)}.problem-lowest-common-ancestor-visual__chip--lca{border-color:var(--problem-lca-accent);color:var(--problem-lca-accent)}.problem-lowest-common-ancestor-visual figcaption{width:min(100%,42rem);color:var(--problem-lca-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-longest-increasing-path-in-a-matrix-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-longest-increasing-path-in-a-matrix-visual{--problem-lip-bg:#f7f3ec;--problem-lip-border:#c9bda9;--problem-lip-text:#2b241b;--problem-lip-muted:#6b5b49;--problem-lip-accent:#a65f12;--problem-lip-accent-bg:#fff1d6;--problem-lip-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-lip-border);background:var(--problem-lip-bg);width:100%;color:var(--problem-lip-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-longest-increasing-path-in-a-matrix-visual{--problem-lip-bg:#fffaf2;--problem-lip-border:#d8c2a1;--problem-lip-text:#392819;--problem-lip-muted:#725c43;--problem-lip-accent:#a65f12;--problem-lip-accent-bg:#fff0d1;--problem-lip-accent-border:#d79a43}[data-theme=dark] 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.75rem;font-size:1.1rem;font-weight:800;display:inline-flex}.problem-longest-increasing-path-in-a-matrix-visual__arrow{color:var(--problem-lip-muted);font-family:var(--font-mono);font-size:1rem;font-weight:800}.problem-longest-increasing-path-in-a-matrix-visual figcaption{width:min(100%,42rem);color:var(--problem-lip-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-letter-combinations-of-a-phone-number-visual{--problem-phone-bg:#f7f3ec;--problem-phone-border:#c9bda9;--problem-phone-text:#2b241b;--problem-phone-muted:#6b5b49;--problem-phone-accent:#a65f12;--problem-phone-accent-bg:#fff1d6;--problem-phone-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-phone-border);background:var(--problem-phone-bg);width:100%;color:var(--problem-phone-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-letter-combinations-of-a-phone-number-visual{--problem-phone-bg:#fffaf2;--problem-phone-border:#d8c2a1;--problem-phone-text:#392819;--problem-phone-muted:#725c43;--problem-phone-accent:#a65f12;--problem-phone-accent-bg:#fff0d1;--problem-phone-accent-border:#d79a43}[data-theme=dark] .problem-letter-combinations-of-a-phone-number-visual{--problem-phone-bg:#181512;--problem-phone-border:#514333;--problem-phone-text:#f4eadc;--problem-phone-muted:#c0ad96;--problem-phone-accent:#f0b35b;--problem-phone-accent-bg:#302314;--problem-phone-accent-border:#94631e}.problem-letter-combinations-of-a-phone-number-visual__title{color:var(--problem-phone-text);align-items:center;gap:.5rem;font-size:1.1rem;font-weight:800;display:flex}.problem-letter-combinations-of-a-phone-number-visual__title svg{width:1.1rem;height:1.1rem;color:var(--problem-phone-accent)}.problem-letter-combinations-of-a-phone-number-visual__levels,.problem-letter-combinations-of-a-phone-number-visual__leaves{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;width:min(100%,52rem);margin:0 auto;display:flex}.problem-letter-combinations-of-a-phone-number-visual__prefix,.problem-letter-combinations-of-a-phone-number-visual__branch,.problem-letter-combinations-of-a-phone-number-visual__leaves strong{border:1px solid var(--problem-phone-border);background:var(--problem-phone-bg);min-height:2.5rem;color:var(--problem-phone-text);font-family:var(--font-mono);text-align:center;border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-letter-combinations-of-a-phone-number-visual__prefix{color:var(--problem-phone-muted);font-family:var(--font-sans)}.problem-letter-combinations-of-a-phone-number-visual__branch{border-color:var(--problem-phone-accent-border);background:var(--problem-phone-accent-bg);color:var(--problem-phone-accent)}.problem-letter-combinations-of-a-phone-number-visual__leaves strong{min-width:3rem}.problem-letter-combinations-of-a-phone-number-visual figcaption{width:min(100%,52rem);color:var(--problem-phone-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-kth-smallest-element-in-a-sorted-matrix-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-kth-smallest-element-in-a-sorted-matrix-visual{--problem-kth-matrix-bg:#f7f3ec;--problem-kth-matrix-border:#c9bda9;--problem-kth-matrix-text:#2b241b;--problem-kth-matrix-muted:#6b5b49;--problem-kth-matrix-accent:#a65f12;--problem-kth-matrix-accent-bg:#fff1d6;--problem-kth-matrix-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-kth-matrix-border);background:var(--problem-kth-matrix-bg);width:100%;color:var(--problem-kth-matrix-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-kth-smallest-element-in-a-sorted-matrix-visual{--problem-kth-matrix-bg:#fffaf2;--problem-kth-matrix-border:#d8c2a1;--problem-kth-matrix-text:#392819;--problem-kth-matrix-muted:#725c43;--problem-kth-matrix-accent:#a65f12;--problem-kth-matrix-accent-bg:#fff0d1;--problem-kth-matrix-accent-border:#d79a43}[data-theme=dark] .problem-kth-smallest-element-in-a-sorted-matrix-visual{--problem-kth-matrix-bg:#181512;--problem-kth-matrix-border:#514333;--problem-kth-matrix-text:#f4eadc;--problem-kth-matrix-muted:#c0ad96;--problem-kth-matrix-accent:#f0b35b;--problem-kth-matrix-accent-bg:#302314;--problem-kth-matrix-accent-border:#94631e}.problem-kth-smallest-element-in-a-sorted-matrix-visual__title{color:var(--problem-kth-matrix-text);font-size:1.1rem;font-weight:800}.problem-kth-smallest-element-in-a-sorted-matrix-visual__grid{grid-template-columns:repeat(3,minmax(5rem,7rem));gap:.75rem;width:min(100%,23rem);margin:0 auto;display:grid}.problem-kth-smallest-element-in-a-sorted-matrix-visual__cell{border:1px solid var(--problem-kth-matrix-border);background:var(--problem-kth-matrix-bg);min-height:3.25rem;color:var(--problem-kth-matrix-text);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;font-size:1.05rem;font-weight:800;display:inline-flex}.problem-kth-smallest-element-in-a-sorted-matrix-visual__cell--answer{border-color:var(--problem-kth-matrix-accent-border);background:var(--problem-kth-matrix-accent-bg);color:var(--problem-kth-matrix-accent)}.problem-kth-smallest-element-in-a-sorted-matrix-visual figcaption{width:min(100%,46rem);color:var(--problem-kth-matrix-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-jump-game-ii-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-jump-game-ii-visual{--problem-jump-game-ii-bg:#f7f3ec;--problem-jump-game-ii-border:#c9bda9;--problem-jump-game-ii-text:#2b241b;--problem-jump-game-ii-muted:#6b5b49;--problem-jump-game-ii-accent:#a65f12;--problem-jump-game-ii-accent-bg:#fff1d6;--problem-jump-game-ii-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-jump-game-ii-border);background:var(--problem-jump-game-ii-bg);width:100%;color:var(--problem-jump-game-ii-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-jump-game-ii-visual{--problem-jump-game-ii-bg:#fffaf2;--problem-jump-game-ii-border:#d8c2a1;--problem-jump-game-ii-text:#392819;--problem-jump-game-ii-muted:#725c43;--problem-jump-game-ii-accent:#a65f12;--problem-jump-game-ii-accent-bg:#fff0d1;--problem-jump-game-ii-accent-border:#d79a43}[data-theme=dark] .problem-jump-game-ii-visual{--problem-jump-game-ii-bg:#181512;--problem-jump-game-ii-border:#514333;--problem-jump-game-ii-text:#f4eadc;--problem-jump-game-ii-muted:#c0ad96;--problem-jump-game-ii-accent:#f0b35b;--problem-jump-game-ii-accent-bg:#302314;--problem-jump-game-ii-accent-border:#94631e}.problem-jump-game-ii-visual__title{color:var(--problem-jump-game-ii-text);font-size:1.1rem;font-weight:800}.problem-jump-game-ii-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 auto;display:block}.problem-jump-game-ii-visual__cell{fill:var(--problem-jump-game-ii-bg);stroke:var(--problem-jump-game-ii-border);stroke-width:2px}.problem-jump-game-ii-visual__cell--goal{fill:var(--problem-jump-game-ii-accent-bg);stroke:var(--problem-jump-game-ii-accent-border)}.problem-jump-game-ii-visual__row-label{fill:var(--problem-jump-game-ii-muted);font-family:var(--font-sans);font-size:1rem;font-weight:700}.problem-jump-game-ii-visual__value{fill:var(--problem-jump-game-ii-text);font-family:var(--font-mono);font-size:1.2rem;font-weight:800}.problem-jump-game-ii-visual figcaption{width:min(100%,46rem);color:var(--problem-jump-game-ii-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-implement-trie-prefix-tree-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-implement-trie-prefix-tree-visual{--problem-trie-bg:#f7f3ec;--problem-trie-border:#c9bda9;--problem-trie-text:#2b241b;--problem-trie-muted:#6b5b49;--problem-trie-accent:#a65f12;--problem-trie-accent-bg:#fff1d6;--problem-trie-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-trie-border);background:var(--problem-trie-bg);width:100%;color:var(--problem-trie-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-implement-trie-prefix-tree-visual{--problem-trie-bg:#fffaf2;--problem-trie-border:#d8c2a1;--problem-trie-text:#392819;--problem-trie-muted:#725c43;--problem-trie-accent:#a65f12;--problem-trie-accent-bg:#fff0d1;--problem-trie-accent-border:#d79a43}[data-theme=dark] .problem-implement-trie-prefix-tree-visual{--problem-trie-bg:#181512;--problem-trie-border:#514333;--problem-trie-text:#f4eadc;--problem-trie-muted:#c0ad96;--problem-trie-accent:#f0b35b;--problem-trie-accent-bg:#302314;--problem-trie-accent-border:#94631e}.problem-implement-trie-prefix-tree-visual__title{color:var(--problem-trie-text);font-size:1.1rem;font-weight:800}.problem-implement-trie-prefix-tree-visual__rows{gap:.75rem;width:min(100%,58rem);min-width:34rem;margin:0 auto;display:grid}.problem-implement-trie-prefix-tree-visual__row{border:1px solid var(--problem-trie-border);background:var(--problem-trie-bg);border-radius:.5rem;flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;padding:.75rem;display:flex}.problem-implement-trie-prefix-tree-visual__node{box-sizing:border-box;border:1px solid var(--problem-trie-border);background:var(--problem-trie-bg);min-width:2.5rem;min-height:2.5rem;color:var(--problem-trie-text);font-family:var(--font-mono);border-radius:.35rem;justify-content:center;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:800;display:inline-flex}.problem-implement-trie-prefix-tree-visual__node--word{border-color:var(--problem-trie-accent-border);background:var(--problem-trie-accent-bg);color:var(--problem-trie-accent)}.problem-implement-trie-prefix-tree-visual__arrow{color:var(--problem-trie-muted);font-size:1rem}.problem-implement-trie-prefix-tree-visual__results{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.problem-implement-trie-prefix-tree-visual__badge{border:1px solid var(--problem-trie-border);background:var(--problem-trie-bg);color:var(--problem-trie-text);font-family:var(--font-mono);border-radius:.35rem;align-items:center;padding:.5rem .75rem;font-size:1rem;font-weight:700;display:inline-flex}.problem-implement-trie-prefix-tree-visual__badge--strong{border-color:var(--problem-trie-accent-border);background:var(--problem-trie-accent-bg);color:var(--problem-trie-accent)}.problem-implement-trie-prefix-tree-visual figcaption{width:min(100%,58rem);color:var(--problem-trie-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-happy-number-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-happy-number-visual{--problem-happy-number-bg:#f7f3ec;--problem-happy-number-border:#c9bda9;--problem-happy-number-text:#2b241b;--problem-happy-number-muted:#6b5b49;--problem-happy-number-accent:#a65f12;--problem-happy-number-accent-bg:#fff1d6;--problem-happy-number-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-happy-number-border);background:var(--problem-happy-number-bg);width:100%;color:var(--problem-happy-number-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-happy-number-visual{--problem-happy-number-bg:#fffaf2;--problem-happy-number-border:#d8c2a1;--problem-happy-number-text:#392819;--problem-happy-number-muted:#725c43;--problem-happy-number-accent:#a65f12;--problem-happy-number-accent-bg:#fff0d1;--problem-happy-number-accent-border:#d79a43}[data-theme=dark] .problem-happy-number-visual{--problem-happy-number-bg:#181512;--problem-happy-number-border:#514333;--problem-happy-number-text:#f4eadc;--problem-happy-number-muted:#c0ad96;--problem-happy-number-accent:#f0b35b;--problem-happy-number-accent-bg:#302314;--problem-happy-number-accent-border:#94631e}.problem-happy-number-visual__title{color:var(--problem-happy-number-text);font-size:1.1rem;font-weight:800}.problem-happy-number-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 auto;display:block}#problem-happy-number-visual-arrow path{fill:var(--problem-happy-number-accent)}.problem-happy-number-visual__connector{stroke:var(--problem-happy-number-accent);stroke-width:2.5px}.problem-happy-number-visual__state{fill:var(--problem-happy-number-bg);stroke:var(--problem-happy-number-border);stroke-width:2px}.problem-happy-number-visual__state--terminal{fill:var(--problem-happy-number-accent-bg);stroke:var(--problem-happy-number-accent-border)}.problem-happy-number-visual__value{fill:var(--problem-happy-number-text);font-family:var(--font-mono);font-size:1.1rem;font-weight:800}.problem-happy-number-visual figcaption{width:min(100%,46rem);color:var(--problem-happy-number-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-gas-station-visual{--problem-gas-station-bg:#f7f3ec;--problem-gas-station-border:#c9bda9;--problem-gas-station-text:#2b241b;--problem-gas-station-muted:#6b5b49;--problem-gas-station-accent:#a65f12;--problem-gas-station-accent-bg:#fff1d6;--problem-gas-station-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-gas-station-border);background:var(--problem-gas-station-bg);width:100%;color:var(--problem-gas-station-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-gas-station-visual{--problem-gas-station-bg:#fffaf2;--problem-gas-station-border:#d8c2a1;--problem-gas-station-text:#392819;--problem-gas-station-muted:#725c43;--problem-gas-station-accent:#a65f12;--problem-gas-station-accent-bg:#fff0d1;--problem-gas-station-accent-border:#d79a43}[data-theme=dark] .problem-gas-station-visual{--problem-gas-station-bg:#181512;--problem-gas-station-border:#514333;--problem-gas-station-text:#f4eadc;--problem-gas-station-muted:#c0ad96;--problem-gas-station-accent:#f0b35b;--problem-gas-station-accent-bg:#302314;--problem-gas-station-accent-border:#94631e}.problem-gas-station-visual__title{color:var(--problem-gas-station-text);align-items:center;gap:.5rem;font-size:1.1rem;font-weight:800;display:flex}.problem-gas-station-visual__title svg{width:1.1rem;height:1.1rem;color:var(--problem-gas-station-accent)}.problem-gas-station-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 auto;display:block}#problem-gas-station-visual-arrow path{fill:var(--problem-gas-station-accent)}.problem-gas-station-visual__route line{stroke:var(--problem-gas-station-accent);stroke-width:3px}.problem-gas-station-visual__station-card{fill:var(--problem-gas-station-bg);stroke:var(--problem-gas-station-border);stroke-width:2px}.problem-gas-station-visual__station-label{fill:var(--problem-gas-station-text);font-family:var(--font-sans);font-size:1rem;font-weight:800}.problem-gas-station-visual__station-detail{fill:var(--problem-gas-station-muted);font-family:var(--font-mono);font-size:1rem}.problem-gas-station-visual figcaption{width:min(100%,46rem);color:var(--problem-gas-station-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-first-missing-positive-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-first-missing-positive-visual{--problem-first-missing-positive-bg:#f7f3ec;--problem-first-missing-positive-border:#c9bda9;--problem-first-missing-positive-text:#2b241b;--problem-first-missing-positive-muted:#6b5b49;--problem-first-missing-positive-accent:#a65f12;--problem-first-missing-positive-accent-bg:#fff1d6;--problem-first-missing-positive-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-first-missing-positive-border);background:var(--problem-first-missing-positive-bg);width:100%;color:var(--problem-first-missing-positive-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-first-missing-positive-visual{--problem-first-missing-positive-bg:#fffaf2;--problem-first-missing-positive-border:#d8c2a1;--problem-first-missing-positive-text:#392819;--problem-first-missing-positive-muted:#725c43;--problem-first-missing-positive-accent:#a65f12;--problem-first-missing-positive-accent-bg:#fff0d1;--problem-first-missing-positive-accent-border:#d79a43}[data-theme=dark] .problem-first-missing-positive-visual{--problem-first-missing-positive-bg:#181512;--problem-first-missing-positive-border:#514333;--problem-first-missing-positive-text:#f4eadc;--problem-first-missing-positive-muted:#c0ad96;--problem-first-missing-positive-accent:#f0b35b;--problem-first-missing-positive-accent-bg:#302314;--problem-first-missing-positive-accent-border:#94631e}.problem-first-missing-positive-visual__title{color:var(--problem-first-missing-positive-text);font-size:1.1rem;font-weight:800}.problem-first-missing-positive-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 auto;display:block}.problem-first-missing-positive-visual__slot{fill:var(--problem-first-missing-positive-bg);stroke:var(--problem-first-missing-positive-border);stroke-width:2px}.problem-first-missing-positive-visual__slot--missing{fill:var(--problem-first-missing-positive-accent-bg);stroke:var(--problem-first-missing-positive-accent-border);stroke-dasharray:8 6}.problem-first-missing-positive-visual__row-label{fill:var(--problem-first-missing-positive-muted);font-family:var(--font-sans);font-size:1rem;font-weight:700}.problem-first-missing-positive-visual__value{fill:var(--problem-first-missing-positive-text);font-family:var(--font-mono);font-size:1.2rem;font-weight:800}.problem-first-missing-positive-visual__value--missing{fill:var(--problem-first-missing-positive-accent)}.problem-first-missing-positive-visual figcaption{width:min(100%,46rem);color:var(--problem-first-missing-positive-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-find-minimum-in-rotated-sorted-array-visual__divider{border-top:1px solid var(--visual-container-border);height:0;margin:1rem 0 0}.problem-find-minimum-in-rotated-sorted-array-visual{--problem-rotated-min-bg:#f7f3ec;--problem-rotated-min-border:#c9bda9;--problem-rotated-min-text:#2b241b;--problem-rotated-min-muted:#6b5b49;--problem-rotated-min-accent:#a65f12;--problem-rotated-min-accent-bg:#fff1d6;--problem-rotated-min-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-rotated-min-border);background:var(--problem-rotated-min-bg);width:100%;color:var(--problem-rotated-min-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-find-minimum-in-rotated-sorted-array-visual{--problem-rotated-min-bg:#fffaf2;--problem-rotated-min-border:#d8c2a1;--problem-rotated-min-text:#392819;--problem-rotated-min-muted:#725c43;--problem-rotated-min-accent:#a65f12;--problem-rotated-min-accent-bg:#fff0d1;--problem-rotated-min-accent-border:#d79a43}[data-theme=dark] .problem-find-minimum-in-rotated-sorted-array-visual{--problem-rotated-min-bg:#181512;--problem-rotated-min-border:#514333;--problem-rotated-min-text:#f4eadc;--problem-rotated-min-muted:#c0ad96;--problem-rotated-min-accent:#f0b35b;--problem-rotated-min-accent-bg:#302314;--problem-rotated-min-accent-border:#94631e}.problem-find-minimum-in-rotated-sorted-array-visual__title{color:var(--problem-rotated-min-text);font-size:1.1rem;font-weight:800}.problem-find-minimum-in-rotated-sorted-array-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 auto;display:block}.problem-find-minimum-in-rotated-sorted-array-visual__baseline{stroke:var(--problem-rotated-min-border);stroke-width:2px}.problem-find-minimum-in-rotated-sorted-array-visual__bar{fill:var(--problem-rotated-min-bg);stroke:var(--problem-rotated-min-border);stroke-width:2px}.problem-find-minimum-in-rotated-sorted-array-visual__bar--minimum{fill:var(--problem-rotated-min-accent-bg);stroke:var(--problem-rotated-min-accent-border)}.problem-find-minimum-in-rotated-sorted-array-visual__value{fill:var(--problem-rotated-min-text);font-family:var(--font-mono);font-size:1.15rem;font-weight:800}.problem-find-minimum-in-rotated-sorted-array-visual__break{stroke:var(--problem-rotated-min-accent);stroke-dasharray:8 6;stroke-width:2px}.problem-find-minimum-in-rotated-sorted-array-visual__break-label{fill:var(--problem-rotated-min-accent);font-family:var(--font-sans);font-size:1rem;font-weight:700}.problem-find-minimum-in-rotated-sorted-array-visual figcaption{width:min(100%,46rem);color:var(--problem-rotated-min-muted);margin:0 auto;font-size:1rem;line-height:1.55}.problem-find-all-anagrams-in-a-string-visual{--problem-anagrams-bg:#f7f3ec;--problem-anagrams-border:#c9bda9;--problem-anagrams-text:#2b241b;--problem-anagrams-muted:#6b5b49;--problem-anagrams-accent:#a65f12;--problem-anagrams-accent-bg:#fff1d6;--problem-anagrams-accent-border:#d79a43;box-sizing:border-box;border:1px solid var(--problem-anagrams-border);background:var(--problem-anagrams-bg);width:100%;color:var(--problem-anagrams-text);border-radius:.5rem;flex-direction:column;gap:1rem;margin:1rem 0 0;padding:1rem 1.25rem;display:flex;overflow-x:auto}[data-theme=warm] .problem-find-all-anagrams-in-a-string-visual{--problem-anagrams-bg:#fffaf2;--problem-anagrams-border:#d8c2a1;--problem-anagrams-text:#392819;--problem-anagrams-muted:#725c43;--problem-anagrams-accent:#a65f12;--problem-anagrams-accent-bg:#fff0d1;--problem-anagrams-accent-border:#d79a43}[data-theme=dark] .problem-find-all-anagrams-in-a-string-visual{--problem-anagrams-bg:#181512;--problem-anagrams-border:#514333;--problem-anagrams-text:#f4eadc;--problem-anagrams-muted:#c0ad96;--problem-anagrams-accent:#f0b35b;--problem-anagrams-accent-bg:#302314;--problem-anagrams-accent-border:#94631e}.problem-find-all-anagrams-in-a-string-visual__title{color:var(--problem-anagrams-text);align-items:center;gap:.5rem;font-size:1.1rem;font-weight:800;display:flex}.problem-find-all-anagrams-in-a-string-visual__title svg{width:1.1rem;height:1.1rem;color:var(--problem-anagrams-accent)}.problem-find-all-anagrams-in-a-string-visual__diagram{width:min(100%,46rem);min-width:36rem;height:auto;margin:0 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