* {
    box-sizing: border-box;
}

.container .gallery a img {
    float: left;
    width: 25%;
    height: auto;
    border: 2px solid #fff;
    -webkit-transition: -webkit-transform .15s ease;
    -moz-transition: -moz-transform .15s ease;
    -o-transition: -o-transform .15s ease;
    -ms-transition: -ms-transform .15s ease;
    transition: transform .15s ease;
    position: relative;
}

.clear {
    clear: both;
}

a {
    color: #009688;
    text-decoration: none;
}

    a:hover {
        color: #01695f;
        text-decoration: none;
    }