.all_keywords {
    background-color: gray;
    padding: 10px;
    width: 100%;
    display: inline-block;
}
.all_keywords h2 {
    color: white;
    font-size: 14px;
    width: 24%;
    float: left;
    text-align: center;
    padding: 10px;
    margin: 5px;
    background-color: #535252;
    text-transform: capitalize;
}
@media screen and (min-device-width: 200px) and (max-device-width: 768px) { 
    .all_keywords h2 {
        width: 100%;
    }
    
}