body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

.background {
    background-image: url('img/img_fondo.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-content {
    background: rgba(255, 255, 255, 0.8);
    padding: 325px;
    border-radius: 10px;
    text-align: center;
}

.main-content img {
    max-width: 60%;
    height: auto;
    border-radius: 10px;
}