:root{--primary: #667eea;--primary-dark: #5a67d8;--primary-light: #ebf4ff;--surface: #ffffff;--bg-secondary: #f9fafb;--border: #e5e7eb;--text-primary: #111827;--text-secondary: #6b7280;--danger: #ef4444;--danger-light: #fef2f2}[data-theme=dark]{--primary: #818cf8;--primary-dark: #6366f1;--primary-light: #1e1b4b;--surface: #1e2028;--bg-secondary: #13151a;--border: #2e3244;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--danger: #f87171;--danger-light: #2d1515}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-secondary);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font-family:inherit;font-size:inherit}input,select,textarea{background:var(--surface);color:var(--text-primary);border-color:var(--border)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}