:root{color-scheme:dark;--bg:#0b0f14;--bg-accent:#0d1220;--surface:#111827;--surface-2:#0f172a;--border:#1f2937;--text:#e5e7eb;--muted:#9ca3af;--primary:#60a5fa;--primary-600:#3b82f6;--success:#10b981;--danger:#ef4444;--radius:12px;--shadow:0 10px 30px rgba(0,0,0,.35)}body,html{margin:0;padding:0}body{min-height:100vh;background:radial-gradient(1200px 700px at 10% -10%,var(--bg-accent),var(--bg));color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,Liberation Sans,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}main{max-width:860px;margin:4rem auto;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}h1,h2,h3{line-height:1.2}h1{font-size:2rem}h2{font-size:1.4rem;color:var(--muted)}h3{font-size:1.1rem}p,small{color:var(--muted)}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-600)}button{font:inherit;padding:10px 14px;border-radius:10px;border:1px solid var(--border);background:linear-gradient(180deg,#0f172a,#0b1220);color:var(--text);cursor:pointer;transition:transform .04s ease,border-color .2s ease,background .2s ease}button:hover{border-color:var(--primary)}button:active{transform:translateY(1px)}input,select,textarea{font:inherit;color:var(--text);background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px 12px}.stack{flex-direction:column}.row,.stack{display:flex;gap:12px}.row{align-items:center}