:root { --bg: #f8f9fa; }

html, body {
  height: 100%;
}

body {
  background-color: var(--bg);
}

main {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.card {
  max-width: 420px;
  width: 100%;
}

.d-none {
  display: none !important;
}