:root{color-scheme:light;--bg:#f6f8fa;--surface:#ffffff;--surface-muted:#f9fafb;--text:#111827;--text-strong:#030712;--muted:#6b7280;--muted-strong:#4b5563;--muted-soft:#9ca3af;--line:#e5e7eb;--line-strong:#d1d5db;--line-dark:#9ca3af;--primary:#2563eb;--primary-deep:#1d4ed8;--primary-soft:#eff6ff;--success:#047857;--danger:#b91c1c;--shadow:0 18px 50px rgba(15,23,42,0.06);font-family:IBM Plex Sans,Aptos,Segoe UI,Helvetica Neue,sans-serif}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--text)}body{min-height:100vh;position:relative}button,input,select,textarea{font:inherit}a{color:inherit}