:root{--bg-primary: #ffffff;--bg-secondary: #f5f7fa;--bg-tertiary: #e9ecef;--text-primary: #2c3e50;--text-secondary: #7f8c8d;--text-tertiary: #95a5a6;--border-color: #e0e0e0;--border-hover: #667eea;--accent-primary: #667eea;--accent-secondary: #764ba2;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--info: #3b82f6;--sidebar-bg: #2c3e50;--sidebar-text: rgba(255, 255, 255, .8);--sidebar-active: rgba(255, 255, 255, .15);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .15)}:root.dark{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--bg-tertiary: #3a3a3a;--text-primary: #e5e5e5;--text-secondary: #a0a0a0;--text-tertiary: #737373;--border-color: #404040;--border-hover: #667eea;--accent-primary: #7c8adb;--accent-secondary: #8b5ebf;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--info: #3b82f6;--sidebar-bg: #1f1f1f;--sidebar-text: rgba(255, 255, 255, .9);--sidebar-active: rgba(255, 255, 255, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5)}body{background-color:var(--bg-secondary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-tertiary)}::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}::selection{background-color:var(--accent-primary);color:#fff}*:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}*{transition:background-color .2s ease,color .2s ease,border-color .2s ease}