.tabs {
    position: relative;
}

.tab {
    float: left;
}

.tab-label {
    display: inline-block;
}

.tab-content {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -ms-box-sizing: border-box;
    box-sizing: border-box;
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.tab.active .tab-content {
    display: block;
}