.container {
    width: 95%;
    margin: 0;
    padding: 0;
}

.grid-container {
    display: none;
}
/* ----- Image grids ----- */
ul.rig {
    list-style: none;
    font-size: 0px;
    margin-left: -2.5%; /* should match li left margin */
}
ul.rig li {
    display: inline-block;
    padding: 5px;
    height: 250px;
    margin: 2.5% 0 2.5% 2.5%;
    background: #fff;
    border: 1px solid #ddd;
    font-size: 16px;
    font-size: 1rem;
    vertical-align: top;
    box-shadow: 2px 3px 5px #333;
    box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
}
ul.rig li img {
    max-width: 100%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto; 
}
ul.rig li h3 {
    margin: 0 0 5px;
}
ul.rig li p {
    font-size: .9em;
    line-height: 1.5em;
    color: #999;
}

ul.rig li a:hover, a:visited, a:link, a:active {
    text-decoration: none;
}
/* class for 2 columns */
ul.rig.columns-2 li {
    width: 47.5%; /* this value + 2.5 should = 50% */
}
/* class for 3 columns */
ul.rig.columns-3 li {
    width: 30.83%; /* this value + 2.5 should = 33% */
}
/* class for 4 columns */
ul.rig.columns-4 li {
    width: 22.5%; /* this value + 2.5 should = 25% */
}

@media (max-width: 1199px) {
    .container {
        width: auto;
        padding: 0 10px;
    }
}

@media (max-width: 480px) {
    ul.rig {
        margin-left: 0;
    }
    ul.rig li {
        width: 100% !important; /* over-ride all li styles */
        margin: 0 0 20px;
    }
}