body {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 16px;
}

form.card {
  max-width: 420px;
  width: 92%;
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.title {
  font-weight: 700;
  margin: 0;
}

.muted {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 6px;
}

label {
  display: block;
  margin-top: 6px;
}

input {
  width: 100%;
}

.btn {
  margin-top: 10px;
  width: 100%;
}

.err {
  background: rgba(231, 76, 60, .15);
  border: 1px solid rgba(231, 76, 60, .4);
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 4px;
  color: #ffd6d3;
}

.ok {
  background: rgba(46, 204, 113, .15);
  border: 1px solid rgba(46, 204, 113, .4);
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 4px;
  color: #caffde;
}

.swap {
  display: block;
  text-align: center;
  margin-top: 6px;
  color: var(--muted);
  text-decoration: none;
}

.swap:hover {
  color: var(--accent);
}

@media (max-width: 520px) {
  form.card {
    padding: 18px;
  }

  .title {
    font-size: 20px;
  }
}