:root{--bg:#f6f7f9;--surface:#ffffff;--border:#dfe3e8;--text:#12181f;--text-muted:#5c6874;--accent:#1f6feb;--accent-hover:#1858c4;--accent-contrast:#ffffff;--danger-bg:#fdeced;--danger-border:#f5c2c7;--danger-text:#a3262f;--radius:10px;--shadow:0 1px 2px rgba(16,24,40,0.05),0 8px 24px rgba(16,24,40,0.06)}@media (prefers-color-scheme:dark){:root{--bg:#0e1116;--surface:#161b22;--border:#2b323b;--text:#e7edf3;--text-muted:#96a2ae;--accent:#4d8ef7;--accent-hover:#6aa1f8;--accent-contrast:#0b0e12;--danger-bg:#3a1c1f;--danger-border:#5c2b30;--danger-text:#f5a3a8;--shadow:0 1px 2px rgba(0,0,0,0.4),0 8px 24px rgba(0,0,0,0.35)}}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%}body{background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,sans-serif;font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}button,input{font:inherit}a{color:var(--accent)}