body {
    background: linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)), url('fondo.jpeg') no-repeat center center fixed !important;
    background-size: cover !important;
    background-color: #0b0f19 !important; /* Respaldo */
    margin: 0 !important;
    padding: 0 !important;
    min-height: 100vh !important;
    font-family: Arial, sans-serif;
}

/* Barra de navegación superior */
.navbar {
    background: #343a40;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    margin: 0;
    font-size: 20px;
    color: white;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
    padding: 6px 12px;
    border-radius: 4px;
    background: #007bff;
}

.nav-links a:hover {
    background: #0056b3;
}

.nav-links span {
    color: white;
    font-size: 14px;
}

.nav-links .btn-salir {
    background: #dc3545;
}

.nav-links .btn-salir:hover {
    background: #c82333;
}

/* Contenido principal (Tarjeta blanca central) */
.container {
    max-width: 1100px;
    margin: 30px auto;
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    color: #333; /* Forzar texto oscuro solo dentro del contenedor blanco */
}

/* Tarjetas de estadísticas */
.cards {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.card-stat {
    flex: 1;
    background: #e9ecef;
    padding: 20px;
    border-radius: 6px;
    border-left: 5px solid #007bff;
}

.card-stat h3 {
    margin: 0 0 10px 0;
    font-size: 16px;
    color: #555;
}

.card-stat p {
    margin: 0;
    font-size: 24px;
    font-weight: bold;
    color: #333;
}

/* Tabla */
h2 {
    color: #333;
    margin-top: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    border: 1px solid #dee2e6;
    padding: 12px;
    text-align: left;
    font-size: 14px;
    color: #333; /* Texto oscuro en las celdas para que se lea perfecto */
}

th {
    background-color: #007bff;
    color: white;
}

tr:nth-child(even) {
    background-color: #f8f9fa;
}