.cf:before,
.cf:after{
content: "";
display: table;
}
.cf:after{
    clear: both;
}
.container{
    max-width: 80%px;
    padding: 10px;
    background: #f0f0f0;
    margin: 0 auto;

}
.gallery {
    width: 100%;
}
.gallery-item{
    float: left;
    background: #fff;
    width: 19%;
    margin: 1%;
    padding: 2%;
    padding-bottom: 5%;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, .2);
}
.gallery-item img{
width: 100%;
}