/* Which AI：墨绿、暖白与少量薄荷色。 */
:root {
  --primary-50: #f1f6ef;
  --primary-100: #e2eddf;
  --primary-300: #b5d3ab;
  --primary-400: #8ebc8a;
  --primary-500: #366c53;
  --primary-600: #245440;
  --primary-700: #173f35;
  --brand-ink: #173f35;
  --brand-muted: #68776e;
  --brand-focus: rgba(54, 108, 83, 0.16);
}

.btn:focus-visible,
.icon-button:focus-visible,
.input:focus-visible,
.locale-option:focus-visible,
.otp-input:focus-visible,
.field-input-action:focus-visible,
.auth-link:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--primary-700);
  box-shadow: 0 4px 10px rgba(23, 63, 53, 0.1);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-600);
  box-shadow: 0 6px 16px rgba(23, 63, 53, 0.16);
}

.input:focus {
  box-shadow: 0 0 0 4px var(--brand-focus);
}

.input.is-error,
.input.is-error:focus {
  border-color: var(--red-500);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.12);
}

.page-login {
  min-height: 100svh;
  padding: 3rem 1.25rem;
}

.page-login::before {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(215, 231, 204, 0.38), transparent 60%),
    #f7f8f4;
}

.page-login__grid {
  display: none;
}

.page-login__orb--top-right {
  background: rgba(181, 211, 171, 0.12);
}

.page-login__orb--bottom-left {
  background: rgba(181, 211, 171, 0.1);
}

.page-login__orb--center {
  background: transparent;
}

.page-login__content {
  max-width: 27rem;
}

.page-login__brand {
  margin-bottom: 2rem;
}

.page-login__brand-logo {
  border-radius: 1.1rem;
  background: var(--brand-ink);
  box-shadow: 0 6px 16px rgba(23, 63, 53, 0.12);
}

.page-login__brand-title {
  margin: 0.875rem 0 0.5rem;
  background: none;
  color: var(--brand-ink);
  font-size: 2rem;
  font-weight: 650;
  letter-spacing: -0.07rem;
}

.page-login__brand-subtitle {
  color: var(--brand-muted);
  letter-spacing: 0.015em;
}

.page-login__card {
  padding: 2rem;
  border: 1px solid #e4e9df;
  border-radius: 1.5rem;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 40px -12px rgba(28, 50, 38, 0.1);
}

.auth-title {
  color: #21382d;
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.auth-subtitle,
.auth-copyright {
  color: var(--brand-muted);
}

.input-label {
  margin-bottom: 0.5rem;
  color: #374b3e;
}

.input {
  min-height: 3rem;
  border-color: #dfe5dc;
  border-radius: 0.75rem;
  background: #fcfdfa;
}

.input::placeholder {
  color: #7c877f;
}

.field-input-icon,
.field-input-action {
  color: #7c877f;
}

.input-error-text {
  margin-bottom: 0;
}

.auth-submit {
  min-height: 3rem;
  border-radius: 0.75rem;
  font-weight: 600;
}

.modal-card__icon {
  background: var(--primary-100);
}

html.dark {
  --brand-focus: rgba(181, 211, 171, 0.18);
}

html.dark .page-login::before {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(54, 108, 83, 0.16), transparent 60%),
    #101a16;
}

html.dark .page-login__card,
html.dark .modal-card {
  border: 1px solid #314238;
  background: #1b2922;
  box-shadow: 0 16px 40px -12px rgba(0, 0, 0, 0.24);
}

html.dark .page-login__brand-title,
html.dark .auth-title {
  color: #edf4e8;
}

html.dark .page-login__brand-subtitle,
html.dark .auth-subtitle,
html.dark .auth-copyright {
  color: #a5b4a9;
}

html.dark .input-label {
  color: #d6e0d4;
}

html.dark .input,
html.dark .otp-input,
html.dark .btn-secondary {
  border-color: #405348;
  background: #142019;
  color: #edf4e8;
}

html.dark .input::placeholder,
html.dark .field-input-icon,
html.dark .field-input-action {
  color: #9aaa9f;
}

html.dark .input:focus {
  border-color: var(--primary-300);
}

html.dark .input.is-error {
  border-color: var(--red-500);
}

html.dark .btn-primary {
  background: #d8f5ba;
  color: #173f35;
  box-shadow: none;
}

html.dark .btn-primary:hover:not(:disabled) {
  background: #c7e8a4;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
}

html.dark .btn-secondary:hover:not(:disabled) {
  background: #24392b;
}

html.dark .modal-card__icon {
  background: #2e4936;
}

@media (max-width: 480px) {
  .page-login {
    padding: 2rem 1.25rem;
  }

  .page-login__card {
    padding: 1.75rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-login .btn {
    transition: none;
    transform: none;
  }
}