* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

.overlay {}

.overlay .slideshow {
    background-color: rgb(34, 34, 34);
    width: 100%;
    height: 700px;
    position: relative;
}

.slideshow img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    user-select: none;
}

.botones {
    background-color: rgba(0, 0, 0, 0.749);
    border-radius: 50%;
    font-size: 30px;
    color: white;
    width: 70px;
    height: 70px;
    line-height: 70px;
    text-align: center;
    position: absolute;
    z-index: 2;
    transition: all .3s ease;
}

.botones:hover {
    cursor: pointer;
    transform: scale(1.2, 1.2);
}

.adelante {
    right: 20px;
    top: calc(50% - 70px + 35px);
}

.atras {
    left: 20px;
    top: calc(50% - 70px + 35px);
}

.mdi {
    pointer-events: none;
}

@media (max-width: 478px) {
    
    .adelante {
        top: calc(100% - 70px - 35px);
    }
    
    .atras {
        top: calc(100% - 70px - 35px);
    }
}