*{box-sizing:border-box;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}
body{margin:0;background:#f6f7fb;color:#111}
.container{max-width:980px;margin:0 auto;padding:24px}
h1{margin:0 0 16px}
.card{background:#fff;border:1px solid #e6e7ee;border-radius:12px;padding:18px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
label{display:block;margin:12px 0 6px;font-weight:600}
input{width:100%;padding:10px 12px;border:1px solid #d7d9e3;border-radius:10px}
button,.btn{display:inline-block;margin-top:14px;padding:10px 14px;border-radius:10px;border:0;background:#2563eb;color:#fff;text-decoration:none;font-weight:700;cursor:pointer}
.alert{background:#fee2e2;border:1px solid #fecaca;color:#991b1b;padding:10px 12px;border-radius:10px;margin:10px 0}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;background:#111;color:#fff}
.topbar-right{display:flex;gap:14px;align-items:center}
.link{color:#fff;text-decoration:underline}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.big{font-size:38px;font-weight:800;margin:8px 0}
@media (max-width:720px){.grid{grid-template-columns:1fr}}