:root{--color-primary: #0059b3;--color-primary-hover: #004a99;--color-primary-light: #e6f0ff;--color-bg: #f4f6f9;--color-surface: #ffffff;--color-text: #1a1a2e;--color-text-muted: #6b7280;--color-border: #d1d5db;--color-error: #dc2626;--color-error-bg: #fef2f2;--color-error-border: #fecaca;--radius: 8px;--shadow: 0 2px 8px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12)}[data-theme=dark]{--color-primary: #4d9fff;--color-primary-hover: #6bb3ff;--color-primary-light: #1a2d4a;--color-bg: #0f1117;--color-surface: #1a1d27;--color-text: #e4e6eb;--color-text-muted: #9ca3af;--color-border: #2d3140;--color-error: #f87171;--color-error-bg: #2d1515;--color-error-border: #5c2020;--shadow: 0 2px 8px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--color-bg);color:var(--color-text);min-height:100vh;transition:background-color .3s,color .3s}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}input{font-family:inherit}