:root {
  --ink: #1c1917;
  --gold: #c9a24a;
  --gold-soft: #f4e9d0;
}

body {
  min-height: 100vh;
  margin: 0;
  background: radial-gradient(circle at top, #2a2622 0%, var(--ink) 65%);
  font-family: "Noto Sans TC", system-ui, -apple-system, sans-serif;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.card {
  width: 100%;
  max-width: 420px;
  border: none;
  border-radius: 1rem;
  padding: 2rem 1.75rem;
  background: #fff;
}

.card-brand {
  text-align: center;
  margin-bottom: 1.25rem;
}

.brand-icon {
  font-size: 2.5rem;
  display: block;
}

.card-brand h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  margin-top: 0.25rem;
}

.group-name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  min-height: 1.5em;
}

.btn-gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
  font-weight: 600;
}

.btn-gold:hover,
.btn-gold:focus {
  background: #b6913e;
  border-color: #b6913e;
  color: var(--ink);
}

footer a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

footer a:hover {
  color: var(--gold);
}