:root {
  --auth-card-width: min(460px, calc(100vw - 32px));
}

body {
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

main.card {
  width: var(--auth-card-width);
  padding: 26px;
  display: grid;
  gap: 16px;
}

.card h1 {
  font-size: clamp(1.5rem, 1.2rem + 0.8vw, 2rem);
  margin: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

a.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.98rem;
}

a.secondary {
  border-color: var(--control-border);
  background: var(--surface-soft);
  color: var(--text);
}

.muted {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.01em;
}

code {
  font-family: var(--font-mono);
  background: var(--surface-soft);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1px 6px;
}

@media (max-width: 560px) {
  body {
    padding: 12px;
  }

  main.card {
    width: 100%;
    padding: 20px;
  }

  .row {
    align-items: stretch;
  }

  a.button,
  button {
    width: 100%;
  }
}