:root{--bg-primary:#f0f0f0;--bg-secondary:#e4e4e4;--bg-tertiary:#d4d4d4;--text-primary:#1a1a1a;--text-secondary:#4a4a4a;--text-tertiary:#7a7a7a;--border-color:#b0b0b0;--border-color-light:silver;--accent:#0a8f08;--accent-hover:#0b6e09;--accent-light:#0caf0a;--success:#0a8f08;--error:#c00;--card-bg:#e8e8e8;--shadow:#00000026;--tag-bg:#d4d4d4;--subject-tag-bg:#c8e6c9;--subject-tag-color:#1b5e20;--year-tag-bg:#fff9c4;--year-tag-color:#6d4c00;--correct-bg:#c8e6c9;--correct-border:#66bb6a;--incorrect-bg:#ffcdd2;--incorrect-border:#ef5350;--unknown-bg:#fff9c4;--unknown-border:#ffca28;--unknown-color:#9e7700;--bookmark-color:#ff8f00;--bookmark-bg:#fff3e0;--bookmark-border:#ff8f00;--bookmark-text:#6d4c00;--memo-icon-color:#0a8f08;--subject-badge-bg:#2e7d32;--subject-badge-color:#fff;--disabled-bg:#b0b0b0;--input-bg:#f5f5f5;--select-bg:#f5f5f5;--disabled-input-bg:#e0e0e0}[data-theme=dark]{--bg-primary:#0a0a0a;--bg-secondary:#141414;--bg-tertiary:#1e1e1e;--text-primary:#00ff41;--text-secondary:#0c3;--text-tertiary:#009926;--border-color:#1a3a1a;--border-color-light:#244024;--accent:#00ff41;--accent-hover:#0c3;--accent-light:#3f6;--success:#00ff41;--error:#f33;--card-bg:#0f1a0f;--shadow:#00ff411a;--tag-bg:#1a2e1a;--subject-tag-bg:#0a2e0a;--subject-tag-color:#00ff41;--year-tag-bg:#2e2a0a;--year-tag-color:#fc0;--correct-bg:#0a2e0a;--correct-border:#00ff41;--incorrect-bg:#2e0a0a;--incorrect-border:#f33;--unknown-bg:#2e2a0a;--unknown-border:#fc0;--unknown-color:#fc0;--bookmark-color:#fc0;--bookmark-bg:#2e2a0a;--bookmark-border:#fc0;--bookmark-text:#fc0;--memo-icon-color:#00ff41;--subject-badge-bg:#00ff41;--subject-badge-color:#000;--disabled-bg:#333;--input-bg:#0f1a0f;--select-bg:#0f1a0f;--disabled-input-bg:#1a2e1a}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:Space 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