:root{--bg: #fff;--text: #222;--container-bg: #fff;--container-shadow: 0 2px 16px rgba(0,0,0,.08);--user-message-bg: linear-gradient(90deg, #e0e7ff 0%, #c7d2fe 100%);--user-message-color: #1e293b;--ai-message-bg: linear-gradient(90deg, #f1f5f9 0%, #e2e8f0 100%);--ai-message-color: #334155;--init-message-bg: linear-gradient(90deg, #fef3c7 0%, #fde68a 100%);--init-message-color: #78350f;--card-background: #ffffff;--border-color: #ddd;--text-primary: #222;--text-secondary: #666;--text-tertiary: #999;--input-background: #ffffff;--primary-color: #007bff;--secondary-color: #6c757d;--danger-color: #dc3545;--link-color: #007bff;--link-visited-color: #0056b3}[data-theme=dark]{--bg: #18181b;--text: #f3f4f6;--container-bg: #232336;--container-shadow: 0 2px 16px rgba(0,0,0,.32);--user-message-bg: linear-gradient(90deg, #312e81 0%, #3730a3 100%);--user-message-color: #e0e7ff;--ai-message-bg: linear-gradient(90deg, #27272a 0%, #334155 100%);--ai-message-color: #f1f5f9;--init-message-bg: linear-gradient(90deg, #713f12 0%, #92400e 100%);--init-message-color: #fef3c7;--card-background: #27272a;--border-color: #3f3f46;--text-primary: #f3f4f6;--text-secondary: #a1a1aa;--text-tertiary: #71717a;--input-background: #18181b;--primary-color: #3b82f6;--secondary-color: #71717a;--danger-color: #ef4444;--link-color: #60a5fa;--link-visited-color: #93c5fd}body{background:var(--bg);color:var(--text);transition:background .2s,color .2s}a{color:var(--link-color);text-decoration:underline}a:visited{color:var(--link-visited-color)}a:hover{opacity:.8}