/* Estilos personalizados */
body {
  background-color: #f5f6f8;
  min-height: 100vh;
}

.navbar {
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card {
  border: none;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  border-radius: 0.5rem;
}

.card-header {
  background-color: #fff;
  border-bottom: 1px solid #eee;
}

.table {
  margin-bottom: 0;
}

.table th {
  font-weight: 600;
  color: #555;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge {
  font-weight: 500;
}

.btn {
  font-weight: 500;
}

.alert {
  border: none;
  border-radius: 0.5rem;
}

/* File input styling */
input[type="file"].form-control {
  padding: 0.5rem;
}

/* Preview table */
.preview-table {
  max-height: 300px;
  overflow-y: auto;
}

/* Responsive table wrapper */
.table-responsive {
  border-radius: 0.375rem;
}

/* Modal backdrop fix for nested modals */
.modal {
  background-color: rgba(0,0,0,0.4);
}