.admin-auth {
  min-height: 100vh;
  display: flex;
  align-items: stretch;
  justify-content: center;
  font-family: var(--font-sans);
  color: var(--color-dark);
  background: var(--color-background);
}

.admin-auth__brand {
  display: none;
  flex: 1;
  max-width: 42%;
  padding: var(--space-12);
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-primary) 100%);
  color: var(--color-light);
}

@media (min-width: 992px) {
  .admin-auth__brand {
    display: flex;
  }
}

.admin-auth__brand-title {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-2);
}

.admin-auth__brand-sub {
  margin: 0;
  font-size: 0.875rem;
  opacity: 0.85;
  color: var(--color-muted);
}

.admin-auth__panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
}

.admin-auth__card {
  width: 100%;
  max-width: 420px;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.admin-auth__heading {
  margin: 0 0 var(--space-2);
  font-size: 1.25rem;
  font-weight: 600;
}

.admin-auth__lead {
  margin: 0 0 var(--space-6);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.admin-auth__field {
  margin-bottom: var(--space-4);
}

.admin-auth__label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-secondary);
}

.admin-auth__input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-dark);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.admin-auth__input::-moz-placeholder {
  color: var(--color-muted);
}

.admin-auth__input:-ms-input-placeholder {
  color: var(--color-muted);
}

.admin-auth__input::placeholder {
  color: var(--color-muted);
}

.admin-auth__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.admin-auth__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.admin-auth__checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-secondary);
  cursor: pointer;
}

.admin-auth__link {
  font-size: 0.8125rem;
  color: var(--color-primary);
  text-decoration: none;
}

.admin-auth__link:hover {
  text-decoration: underline;
}

.admin-auth__submit {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--color-light);
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.05s ease;
}

.admin-auth__submit:hover {
  filter: brightness(1.05);
}

.admin-auth__submit:active {
  transform: translateY(1px);
}

.admin-auth__alert {
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  font-size: 0.8125rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-danger);
  background: var(--color-light);
  color: var(--color-dark);
}

.admin-auth__footer {
  margin-top: var(--space-6);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-muted);
}