/* Variables CSS para consistencia */
:root {
    --primary-color: #007bff; /* Azul Bootstrap */
    --secondary-color: #6c757d; /* Gris */
    --light-bg: #f8f9fa; /* Fondo claro */
    --dark-bg: #343a40; /* Fondo oscuro para headers */
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1); /* Sombra sutil */
    --border-radius: 8px; /* Bordes redondeados */
    --transition: all 0.3s ease; /* Transiciones suaves */
}

/* Estilo general del body */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #87CEEB 0%, #00008B 100%); /* Degradé azul atractivo: de azul cielo a azul marino */
    color: #212529;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* ... (El resto del CSS permanece igual) */

/* Contenedor principal */
.container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

/* Headers */
h2, h4 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

/* Botones personalizados */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
}

.btn-secondary {
    background: linear-gradient(45deg, var(--secondary-color), #5a6268);
    border: none;
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #5a6268, var(--secondary-color));
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(45deg, #dc3545, #c82333);
    border: none;
}

.btn-danger:hover {
    background: linear-gradient(45deg, #c82333, #dc3545);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(45deg, #ffc107, #e0a800);
    border: none;
}

.btn-warning:hover {
    background: linear-gradient(45deg, #e0a800, #ffc107);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(45deg, #28a745, #218838);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(45deg, #218838, #28a745);
    transform: translateY(-2px);
}

/* Formularios */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #ced4da;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Tablas */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table thead th {
    background: var(--dark-bg);
    color: white;
    font-weight: 600;
}

.table tbody tr:hover {
    background: rgba(0, 123, 255, 0.05);
}

/* Alertas */
.alert {
    border-radius: var(--border-radius);
    border: none;
}

/* Navegación o elementos adicionales */
.mb-3, .mb-4 {
    margin-bottom: 1rem !important;
}

/* Responsive: Ajustes para móviles */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
        margin-top: 1rem;
    }
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    .table {
        font-size: 0.9rem;
    }
}