body.auth-app {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: var(--ui-space-5);
  background:
    radial-gradient(circle at 20% 10%, rgba(86, 136, 236, 0.16), transparent 34rem), var(--ui-bg);
}

.auth-card {
  width: min(100%, 440px);
  padding: var(--ui-space-6);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-lg);
  background: var(--ui-surface);
  box-shadow: var(--ui-shadow);
  text-align: center;
}

.auth-mark {
  display: block;
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  box-shadow: 0 10px 30px rgba(86, 136, 236, 0.3);
  object-fit: cover;
}

.auth-card h1 {
  margin: 0 0 var(--ui-space-2);
  font-size: 22px;
  font-weight: 650;
}

.auth-lead {
  margin: 0 0 var(--ui-space-5);
  color: var(--ui-text-soft);
  font-size: 14px;
  line-height: 1.6;
}

.auth-button {
  width: 100%;
  min-height: 44px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 650;
}

.auth-button:hover {
  filter: brightness(1.06);
  text-decoration: none;
}

.auth-error {
  margin-top: 18px;
  padding: 10px 14px;
  border: 1px solid var(--ui-danger-border);
  border-radius: var(--ui-radius-sm);
  color: var(--ui-danger);
  background: var(--ui-danger-soft);
  font-size: 13px;
  text-align: left;
}

.auth-footnote {
  margin: 20px 0 0;
  color: var(--ui-muted);
  font-size: 12px;
}

.auth-actions {
  display: flex;
  flex-direction: column;
  gap: var(--ui-space-3);
  margin-top: var(--ui-space-5);
}

@media (max-width: 480px) {
  body.auth-app {
    padding: var(--ui-space-4);
  }

  .auth-card {
    padding: var(--ui-space-5);
  }
}