#screen-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
}

.auth-wrapper {
  width: min(100%, 380px);
}

.auth-brand {
  text-align: center;
  margin-bottom: var(--space-12);
}

.auth-brand h1 {
  font-size: 2rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0;
}

.auth-brand p {
  color: var(--color-ink-muted);
}

.auth-card {
  background: var(--color-paper-raised);
  border: var(--border-thin);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.auth-header { margin-bottom: var(--space-6); }

.auth-header h2 {
  font-size: var(--text-xl);
  line-height: var(--leading-tight);
}

.auth-header p {
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-field {
  display: block;
  position: relative;
}

.form-field input {
  width: 100%;
  min-height: 44px;
  background: var(--color-paper);
  border: var(--border-thin);
  border-radius: var(--radius-md);
  padding: 0 var(--space-3);
}

.form-field--password input { padding-right: 44px; }

.form-field input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.form-field--password .btn-icon {
  position: absolute;
  top: 50%;
  right: var(--space-2);
  transform: translateY(-50%);
}

.auth-error {
  color: var(--color-error);
  background: var(--color-error-bg);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

.auth-submit.is-loading span::after {
  content: "";
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  margin-left: var(--space-2);
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.auth-switch {
  margin-top: var(--space-5);
  text-align: center;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.auth-switch button {
  color: var(--color-accent);
  font-weight: var(--weight-medium);
}

@keyframes spin { to { transform: rotate(360deg); } }