/* Fondo general */
body {
  background: linear-gradient(135deg, #f0f4f8, #d9e4f5);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Tarjeta principal */
.card {
  border-radius: 12px;
  overflow: hidden;
}

/* Encabezado */
.card-header {
  font-size: 1.3rem;
  font-weight: bold;
  text-align: center;
}

/* Botón personalizado */
.btn-success {
  background-color: #28a745;
  border: none;
  transition: background-color 0.3s ease;
}

.btn-success:hover {
  background-color: #218838;
}

/* Inputs */
.form-control {
  border-radius: 8px;
  border: 1px solid #ced4da;
  transition: box-shadow 0.3s ease;
}

.form-control:focus {
  box-shadow: 0 0 8px rgba(0, 123, 255, 0.4);
  border-color: #80bdff;
}

/* Mensajes */
.success-msg {
  color: #28a745;
  font-weight: bold;
}

.error-msg {
  color: #dc3545;
  font-weight: bold;
}

/* Ajustes responsive */
@media (max-width: 768px) {
  .card {
    margin: 10px;
  }
  .card-header h4 {
    font-size: 1.1rem;
  }
  .btn-success {
    font-size: 1rem;
    padding: 12px;
  }
}
.table-hover tbody tr:hover {
  background-color: #f1f1f1;
}

.table td, .table th {
  text-align: center;
  vertical-align: middle;
}