body {
    font-family: Arial, sans-serif;
    text-align: center;
}

.fondos img {
    width: 80px;
    margin: 5px;
    cursor: pointer;
}

.imagen-final {
    width: 90%;
    max-width: 500px;
}

.botones {
    margin-top: 10px;
}

.btn {
    display: block;
    margin: 5px;
    padding: 10px;
    background: #28a745;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}