html, body {
    height: 100%;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    margin: 0;
    text-align: center;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #002e5b;
    color: white;
    padding: 20px;
}

h1 {
    margin: 0;
}

.container {
    padding: 30px;
    max-width: 800px;
    margin: auto;
    flex: 1;
}

.grid {
    display: grid;
    gap: 20px;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-decoration: none;
    color: black;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    font-weight: bold;
    transition: 0.2s;
}

.card:hover {
    transform: scale(1.05);
}

.lang {
    font-size: 12px;
    opacity: 0.7;
    margin-right: 6px;
}

.texto {
    color: #444;
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 25px;
}

.volver {
    margin-top: 40px;
}

.volver button {
    background: #002e5b;
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 8px;
    cursor: pointer;
}

.volver button:hover {
    background: #004080;
}

footer {
    background-color: #002e5b;
    color: white;
    padding: 15px;
    font-size: 13px;
}