:root {
  --primary: #178087;
  --primary-600: #12686e;
  --primary-light: #f0f7f8;
  --ink: #0f172a;
  --muted: #6b7785;
  --border: #d5dae0;
  --bg-page: #f3f6fb;
  --radius-lg: 14px;
}

* {
  box-sizing: border-box;
}

body.auth-body.admin-login-page {
  margin: 0;
  font-family: 'Roboto Slab', 'Times New Roman', serif;
  min-height: 100vh;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  background:
    radial-gradient(circle at 12% 18%, rgba(23, 128, 135, 0.08), transparent 36%),
    radial-gradient(circle at 88% 82%, rgba(23, 128, 135, 0.06), transparent 38%),
    var(--bg-page);
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 14px;
}

.auth-card {
  width: 100%;
  max-width: 460px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.08);
  padding: 28px 24px;
}

.auth-card .logo__image {
  max-height: 52px;
  width: auto;
}

.auth-card__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--primary);
  box-shadow: 0 8px 18px rgba(23, 128, 135, 0.28);
  flex-shrink: 0;
}

.auth-card__brand h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.auth-card__brand p {
  margin: 2px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.form-label {
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: #000;
  margin-bottom: 0.35rem;
}

.input-group-modern {
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.input-group-modern:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(23, 128, 135, 0.15);
}

.input-group-modern .input-group-text,
.input-group-modern .form-control,
.input-group-modern .btn {
  border: 0;
  background: #fff;
  min-height: 42px;
}

.input-group-modern .input-group-text {
  color: var(--muted);
  padding-left: 0.85rem;
  padding-right: 0.5rem;
}

.input-group-modern .form-control {
  font-size: 0.9rem;
  color: #2d3748;
  padding-left: 0.25rem;
}

.input-group-modern .form-control:focus {
  box-shadow: none;
}

.input-group-modern .btn {
  color: var(--muted);
}

.input-group-modern .btn:hover {
  color: var(--primary-600);
  background: var(--primary-light);
}

.form-check-input {
  border: 2px solid #c8cdd2;
  border-radius: 3px;
}

.form-check-input:checked {
  background-color: var(--primary);
  border-color: var(--primary);
}

.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(23, 128, 135, 0.2);
  border-color: var(--primary);
}

.form-check-label {
  font-size: 0.875rem;
  color: #4b5563;
}

.auth-card .link-primary {
  color: var(--primary) !important;
  font-weight: 600;
}

.auth-card .link-primary:hover {
  color: var(--primary-600) !important;
}

.auth-submit {
  min-height: 42px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: none;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.auth-submit:hover,
.auth-submit:focus {
  background: var(--primary-600);
  border-color: var(--primary-600);
  transform: none;
  box-shadow: none;
}

.auth-submit:disabled {
  opacity: 0.85;
  background: var(--primary);
  border-color: var(--primary);
}

.was-validated .input-group-modern:has(.form-control:invalid) {
  border-color: #dc3545;
  box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.12);
}

.was-validated .mb-3:has(.form-control:invalid) .invalid-feedback {
  display: block;
}

#loginAlert.alert {
  border-radius: 4px;
  font-size: 0.9rem;
}

#loginAlert.alert-success {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #065f46;
}

#loginAlert.alert-danger {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

@media (max-width: 575.98px) {
  .auth-card {
    padding: 22px 16px;
    border-radius: 12px;
  }
}