.admin-section {
  margin-bottom: var(--spacing-xl);
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
  will-change: auto;
}

.stat-card:hover {
  box-shadow: var(--shadow-medium);
  border-color: var(--border-hover);
}

.stat-icon {
  font-size: 2rem;
  opacity: 0.8;
}

.stat-content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.stat-content p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.9rem;
}

.admin-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Tabla de administración */
.admin-table-container {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background: var(--bg-tertiary);
  color: var(--color-primary);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 10;
}

.admin-table tbody tr {
  transition: background-color var(--transition-fast);
}

.admin-table tbody tr:hover {
  background: rgba(16, 185, 129, 0.08);
}

/* Fila expirado (en vista combinada) */
.admin-table tbody tr.row-expired {
  background: rgba(239, 68, 68, 0.08);
}
.admin-table tbody tr.row-expired:hover {
  background: rgba(239, 68, 68, 0.12);
}

.admin-table td {
  color: var(--text-secondary);
}

.admin-table .actions-cell {
  white-space: nowrap;
}

.admin-table .actions-cell .btn {
  padding: 6px 12px;
  font-size: 0.8rem;
  margin-right: var(--spacing-xs);
}

.admin-table .status-warning {
  color: var(--color-warning);
  font-weight: 500;
}

.admin-table .status-active {
  color: var(--color-success);
  font-weight: 500;
}

.admin-table .status-expired {
  color: var(--color-danger);
  font-weight: 500;
}

.admin-table .institution-badge {
  display: inline-block;
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
}

.admin-table .title-cell {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-table .description-cell {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Formulario de aviso */
.aviso-form {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: var(--spacing-lg);
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90dvh;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-large);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  color: var(--color-primary);
  margin: 0;
  font-size: 1.5rem;
}

.modal-body {
  margin-bottom: var(--spacing-lg);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* Login form */
.login-form .form-group {
  margin-bottom: var(--spacing-lg);
}

.login-form .form-actions {
  margin-top: var(--spacing-lg);
}

/* Error messages */
.error-message {
  background: rgba(255, 85, 85, 0.1);
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
}

.success-message {
  background: rgba(80, 250, 123, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 90px;
  right: var(--spacing-lg);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  min-width: 300px;
  box-shadow: var(--shadow-medium);
  animation: slideInRight 0.3s ease-out;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.toast.success {
  border-color: var(--color-success);
  background: rgba(80, 250, 123, 0.1);
  color: var(--color-success);
}

.toast.error {
  border-color: var(--color-danger);
  background: rgba(255, 85, 85, 0.1);
  color: var(--color-danger);
}

.toast.warning {
  border-color: var(--color-warning);
  background: rgba(255, 184, 108, 0.1);
  color: var(--color-warning);
}

.toast.info {
  border-color: var(--color-primary);
  background: rgba(100, 255, 218, 0.1);
  color: var(--color-primary);
}

.toast-close {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.toast-close:hover {
  opacity: 1;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Responsive para admin */
@media (max-width: 768px) {
  .admin-stats {
    grid-template-columns: 1fr;
  }
  
  .admin-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .admin-table-container {
    padding: var(--spacing-md);
  }
  
  .admin-table {
    font-size: 0.8rem;
  }
  
  .admin-table th,
  .admin-table td {
    padding: var(--spacing-sm);
  }
  
  .form-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .aviso-form {
    padding: var(--spacing-lg);
  }
  
  .modal {
    padding: var(--spacing-md);
  }
  
  .modal-content {
    padding: var(--spacing-lg);
  }
  
  .toast-container {
    right: var(--spacing-md);
    left: var(--spacing-md);
  }
  
  .toast {
    min-width: unset;
  }
}

@media (max-width: 480px) {
  .stat-card {
    flex-direction: column;
    text-align: center;
  }
  
  .admin-table .actions-cell .btn {
    display: block;
    margin: 2px 0;
    width: 100%;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .modal-actions {
    flex-direction: column;
  }
}

/* Mejoras adicionales para prevenir parpadeos */
.admin-stats {
  contain: layout;
}

.stat-card {
  contain: layout style;
}

.admin-section {
  contain: layout style;
}

.admin-table-container {
  contain: layout;
}