html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    background: #4B006E;
}
body {
    min-height: 100vh;
    min-width: 100vw;
}
.img-container {
    position: relative;
    width: 100%;
    max-width: 450px;
    height: 100vh;
    max-height: 900px;
    margin: 0 auto;
    overflow: hidden;
}
.img-container img {
    width: 100%;
    max-width: 450px;
    height: 100vh;
    max-height: 900px;
    object-fit: cover;
    display: block;
}
.btn-link, .hotspot-link, .full-img-link {
    position: absolute;
    z-index: 2;
    background: transparent;
    border: none;
    cursor: pointer;
    text-indent: -9999px;
    display: block;
}
.btn-back {
    left: 0;
    top: 0;
    width: 100px;
    height: 100px;
}
.btn-home {
    right: 0;
    top: 0;
    width: 100px;
    height: 100px;
}
@media (min-width: 768px) {
    .img-container {
        display: none;
    }
    body::before {
        content: 'Solo disponible en dispositivos móviles.';
        color: #fff;
        font-size: 2em;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        width: 100vw;
    }
}