:root{--bg: #fbfbfd;--bg-card: white;--bg-secondary: #f5f5f7;--bg-hover: #e8e8ed;--text: #1d1d1f;--text-muted: #86868b;--text-muted-2: #acacb0;--border: #d2d2d7;--border-light: #e8e8ed;--border-table: #f0f0f2;--primary: #0071e3;--primary-hover: #0077ed;--success: #34c759;--success-hover: #2db84e;--success-bg: #f0faf0;--error: #ff3b30;--error-hover: #e6352b;--shadow: 0 4px 24px rgba(0, 0, 0, .06);--shadow-sm: 0 2px 12px rgba(0, 0, 0, .04);--shadow-tab: 0 2px 8px rgba(0, 0, 0, .08);--focus-ring: rgba(0, 113, 227, .15);--tab-hover: rgba(0, 0, 0, .04);--disabled: #d2d2d7;--h1: #1d1d1f;--h2: #1d1d1f;--toggle-bg: #d2d2d7;--toggle-knob: white;--toggle-checked: #0071e3;--model-answer-border: #34c759;--model-answer-label: #34c759}[data-theme=dark]{--bg: #2d2a2e;--bg-card: #353236;--bg-secondary: #403e41;--bg-hover: #4a474b;--text: #fcfcfa;--text-muted: #939293;--text-muted-2: #727072;--border: #403e41;--border-light: #403e41;--border-table: #403e41;--primary: #ab9df2;--primary-hover: 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