:root{--bg: #f6f7fb;--surface: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--primary: #2563eb;--primary-hover: #1d4ed8;--ring: rgba(37, 99, 235, .25);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:inherit;text-decoration:none}input,button{font:inherit}@media(max-width:480px){:root{font-size:15px}}