:root{--bg:#f6f7fb;--surface:#fff;--surface-2:#eef0f6;--text:#12131a;--text-2:#5b5f6e;--text-3:#8a8fa0;--border:#e3e5ee;--accent:#4f46e5;--accent-press:#4038c9;--accent-ink:#fff;--accent-soft:#e9e8fd;--danger:#d93a3a;--shadow:0 1px 2px #10121e0f, 0 8px 24px #10121e14;--chem:#0f9f75;--phys:#2f6fe4;--maths:#d9860b;--bio:#d6427f;--wall:#e7e3dc;--wall-ink:#0000000f;--radius:14px;--radius-lg:22px;--font:-apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono:ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;--spring:cubic-bezier(.2, .9, .3, 1.2)}:root[data-theme=dark]{--bg:#0b0d12;--surface:#141720;--surface-2:#1c202b;--text:#eceef4;--text-2:#9aa1b2;--text-3:#6c7385;--border:#262b38;--accent:#8b85ff;--accent-press:#7a73f2;--accent-ink:#0b0d12;--accent-soft:#211f42;--danger:#ff6b6b;--shadow:0 1px 2px #0000004d, 0 10px 30px 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