/* Fondo celeste-azul con animación de burbujas */
body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    color: #333;
    background: linear-gradient(to right, #3fa9f5, #79d3f7, #b2ebf2); /* mezcla de celeste y azul */
    overflow: hidden;
    position: relative;
}

/* Burbujas flotantes */
body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.2) 8px, transparent 10px),
                      radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 10px, transparent 12px),
                      radial-gradient(circle at 60% 40%, rgba(255, 255, 255, 0.15) 6px, transparent 8px);
    background-repeat: repeat;
    animation: floatBubbles 25s linear infinite;
    z-index: 0;
}

@keyframes floatBubbles {
    0% {
        background-position: 0 100%;
    }
    100% {
        background-position: 0 0;
    }
}

.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 30px;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 14px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

h1 {
    text-align: center;
    font-size: 2rem;
    color: #0077c2;
    margin-bottom: 30px;
}

.cargo-menu {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.cargo-menu a {
    padding: 10px 20px;
    background-color: #b3e5fc;
    border-radius: 8px;
    color: #01579b;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease;
}

.cargo-menu a:hover,
.cargo-menu .activo {
    background-color: #0288d1;
    color: white;
}

.tabla-contenedor {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    border: 1px solid #ccc;
    padding: 12px;
    text-align: center;
}

th {
    background-color: #0288d1;
    color: white;
}

tr:nth-child(even) {
    background-color: #e1f5fe;
}

.volver {
    margin-top: 20px;
    text-align: center;
}

.volver a {
    color: #0077c2;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
}

.volver a:hover {
    color: #01579b;
}