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100%);--card-radius:8px;--problem-desc-text:#334155;--section-title-color:#64748b;--highlight-bg:#fef3c7;--highlight-text:#92400e;--mono-bg:#f1f5f9;--problem-mono-bg:#f1f5f9;--problem-mono-text:#c026d3;--problem-mono-border:#e2e8f0;--problem-intro-text:#64748b;--example-bg:#fff;--example-border:#e2e8f0;--example-header-bg:#f8fafc;--example-header-text:#64748b;--example-label-text:#475569;--example-io-bg:#f1f5f9;--example-io-border:#e2e8f0;--example-output-bg:#dcfce7;--example-output-text:#166534;--example-explanation-border:#e2e8f0;--example-explanation-text:#475569;--edge-case-bg:#fafafa;--edge-case-border:#e5e5e5;--edge-case-icon-bg:#f1f5f9;--edge-case-icon-color:#64748b;--edge-case-text:#475569;--constraints-bg:#fff1f2;--constraints-border:#fda4af;--constraints-text:#881337;--constraints-bullet:#e11d48;--constraints-icon:#9f1239;--constraints-box-bg:#fff;--constraints-box-border:#bfdbfe;--constraints-list-text:var(--color-text-secondary);--complexity-bg:linear-gradient(140deg, #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-bg:#f1f5f9;--solution-lang-text:#334155;--solution-lang-border:#e2e8f0;--solution-lang-active-bg:#eff6ff;--solution-lang-active-border:#2563eb;--solution-lang-active-text:#1e40af;--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:#f8fafc;--visual-border:#cbd5e1;--visual-text:#64748b;--visual-node-border:#334155;--visual-arrow:#94a3b8;--heap-structure-bg:#f8fafc;--heap-structure-border:#cbd5e1;--heap-label:#64748b;--heap-node-bg:#fff;--heap-node-border:#3b82f6;--heap-node-text:#1e40af;--heap-node-shadow:#0000000d;--heap-root-bg:#eff6ff;--heap-root-border:#2563eb;--heap-src-text:#60a5fa;--heap-connector:#cbd5e1;--heap-caption:#94a3b8;--heap-action:#3b82f6;--result-list-bg:#f0fdf4;--result-list-border:#86efac;--visual-land-bg:#22c55e;--visual-land-text:#fff;--visual-water-bg:#e0f2fe;--highlight-success-bg:#dcfce7;--highlight-success-text:#166534;--highlight-success-border:#86efac;--highlight-warning-bg:#fef3c7;--highlight-warning-text:#92400e;--highlight-warning-border:#fcd34d;--ws-grid-bg:#e2e8f0;--ws-cell-bg:#fff;--ws-cell-border:#cbd5e1;--ws-cell-text:#64748b;--ws-cell-active-bg:#3b82f6;--ws-cell-active-text:#fff;--sm-grid-bg:#f8fafc;--sm-cell-bg:#fff;--sm-cell-border:#e2e8f0;--sm-cell-text:#1e293b;--sm-path-color:#3b82f6;--table-th-bg:#f8fafc;--table-stripe-bg:#fafafa;--table-border:#e2e8f0;--trace-header-bg:#1e293b;--trace-header-text:#fff;--trace-border:#e2e8f0;--trace-bg:#fff;--trace-row-stripe:#fafafa;--code-sm-bg:#f1f5f9;--code-sm-text:#334155;--code-sm-null:#94a3b8;--code-sm-success-bg:#dcfce7;--code-sm-success-text:#166534;--code-sm-miss-bg:#fee2e2;--code-sm-miss-text:#dc2626;--cache-item-bg:#dbeafe;--cache-item-text:#1e40af;--cache-item-active-bg:#bbf7d0;--cache-item-active-text:#166534;--cache-item-active-border:#86efac;--cache-evicted-bg:#fee2e2;--cache-evicted-text:#dc2626;--hashmap-bg:#fefce8;--hashmap-border:#facc15;--hashmap-key:#a16207;--hashmap-arrow:#ca8a04;--hashmap-value:#854d0e;--dll-node-border:#94a3b8;--dll-node-bg:#fff;--dll-mru-border:#22c55e;--dll-mru-bg:#f0fdf4;--dll-mru-text:#166534;--dll-lru-border:#ef4444;--dll-lru-bg:#fef2f2;--dll-lru-text:#dc2626;--visual-container-bg:#fff;--visual-container-border:#cbd5e1;--visual-node-bg:#fff;--visual-cell-fresh-bg:#fb923c;--visual-cell-fresh-border:#f97316;--visual-cell-rotten-bg:#ef4444;--visual-cell-rotten-border:#dc2626;--rain-bar-bg:#0f172a;--rain-water-bg:#3b82f6;--grid-visual-border:#334155;--grid-visual-bg:#334155;--grid-cell-bg:#fff;--scroll-track:transparent;--scroll-thumb:#cbd5e1;--scroll-thumb-hover:#94a3b8;--focus-ring:#3b82f680;--overlay-backdrop:#00000080;--font-sans:var(--font-family-sans);--font-mono:var(--font-family-mono);--main-bg:var(--color-bg-primary);--text-header:var(--color-text-primary);--text-main:var(--color-text-secondary);--border-color:var(--color-border-default);--accent:var(--color-accent-primary);--intro-color:var(--color-text-muted);--mono-color:var(--code-inline-text);--code-bg:var(--code-block-bg);--search-bg:var(--sidebar-search-bg);--sidebar-hover:var(--sidebar-item-hover-bg);--sidebar-active:var(--sidebar-item-active-text);--sidebar-active-bg:var(--sidebar-item-active-bg);--sidebar-search-clear-bg:#e2e8f0;--sidebar-search-clear-text:#64748b;--sidebar-search-clear-hover-bg:#cbd5e1;--sidebar-search-clear-hover-text:#475569;--toolbar-shadow:0 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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