:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #182848, #0f2027);
}

.card {
  width: min(720px, 92vw);
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 1.4rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

h1 {
  margin-top: 0;
  font-size: 1.4rem;
}

label,
small,
p {
  display: block;
  color: #cbd5e1;
}

input,
select,
button {
  width: 100%;
  margin: 0.35rem 0 0.85rem;
  padding: 0.72rem;
  border-radius: 8px;
  border: 1px solid #475569;
  background: #0b1220;
  color: #f1f5f9;
}

button {
  cursor: pointer;
  border: none;
  font-weight: 600;
  background: linear-gradient(90deg, #16a34a, #059669);
}

.error {
  border: 1px solid #f87171;
  color: #fecaca;
  background: rgba(127, 29, 29, 0.35);
  padding: 0.8rem;
  border-radius: 8px;
  margin-bottom: 0.9rem;
}