.tab_css {
    display: flex;
    flex-wrap: wrap;
}

.tab_css input {
    display: none
}

.tab_css label {
    margin: 0 5px 5px 0;
    padding: 10px 16px;
    cursor: pointer;
    border-radius: 5px;
    background: #F5F6FA;
    color: #2D3436;
    opacity: 0.5;
}

.tab_content {
    order: 1;
    display: none;
    width: 100%;
    border-bottom: 3px solid #ddd;
    line-height: 1.6;
    font-size: .9em;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.tab_css input:checked + label, .tab_css label:hover {
    opacity: 1;
    font-weight: bold;
}

.tab_css input:checked + label + .tab_content {
    display: initial;
}