.project {
    box-sizing: border-box;
    float: left;
    height: 250px;
    padding: 10px;
    vertical-align: middle;
    width: 33.33%;
}
.thumbnail {
    overflow: hidden;
    height: 230px;
    width: 100%;
}
.thumbnail img{
    height: auto;
    position: relative;
        left: -25%;
        top: -5%;
    width: 500px;
}
.thumbnail a{
    float: left;
    height: 230px;
    position: relative;
    width: 100%;
}
.thumbnail a span {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(0,0,0,0.4);
    color: $grey-color-light;
    padding: 40px;
    text-align: center;
}
.thumbnail a:hover span {
    display: block;
}