body {
    background: var(--background-image) no-repeat center center fixed;
    padding-top: 15px;
    color: var(--main-color);
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.item {
    margin: 0 0 10px;
    position: relative;
}



h2 {
    margin:0;
    font-size: 40px;
    text-align: center;
}

h1 {
    margin-top: 0;
    text-align: center;
    font-size: 50px;
}


html {
    padding: 0 20px; 
}.img {

    box-sizing: border-box;
    width: 100% !important;
    height: auto !important;
    border: 5px solid var(--main-color);
}    

.caption {
    display: none;
    color: white;
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 10px;
    background: rgba(0,0,0,.5);
    box-sizing: border-box;
}

.caption a {
    color: white;
}

.item:hover .caption {
    display: block;
}