.tabs {
    margin-top: 30px;
    display: flex;
    display: -ms-flexbox;
    flex-flow: row nowrap;
    align-items: center;
}

.tab:first-of-type {
    border-left: 1px solid black;
}

.tab {
    border-top: 1px solid black;
    border-right: 1px solid black;
    border-bottom: 1px solid black;
    padding: 10px 5px;
    text-align: center;
    cursor: pointer;
    flex-basis: calc(1920px / 5);
}

.tab_content {
    display: none;
}

.active_tab {
    background: #337ab7;
    color: white;
}

.active_tab_content {
    display: inherit;
}