:root{color-scheme:light dark;--bg: #f8fafc;--card: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--brand: #10b981;--brand-foreground: #0f172a;--danger: #dc2626;font-family:system-ui,-apple-system,Segoe UI,sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #0b1220;--card: #131c2e;--border: #253048;--text: #e2e8f0;--muted: #94a3b8}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}input,button{font:inherit}button{cursor:pointer}