* {
    box-sizing: border-box;
}

/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 600px) {

}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {

}

/* Medium devies (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {

}

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {

}

/* Extra large devices (large laptops and desktops, 1200px and up */
@media only screen and (min-width: 1200px) {

}

/* For mobile phones: */
[class*="col-"] {
    float: left;
    width: 100%;
}

.row::after { content: ""; clear: both; display: table; }

@media only screen and (min-width: 600px) {
    /* For tablets: */
    .col-s-1 {width: 8.33%; }
    .col-s-2 {width: 16.66%; }
    .col-s-3 {width: 25%; }
    .col-s-4 {width: 33.33%; }
    .col-s-5 {width: 41.66%; }
    .col-s-6 {width: 50%; }
    .col-s-7 {width: 58.33%; }
    .col-s-8 {width: 66.66%; }
    .col-s-9 {width: 75%; }
    .col-s-10 {width: 83.33%; }
    .col-s-11 {width: 91.66%; }
    .col-s-12 {width: 100%; }
}

@media only screen and (min-width: 768px) {
    /* For desktop: */
    .col-1 {width: 8.33%; }
    .col-2 {width: 16.66%; }
    .col-3 {width: 25%; }
    .col-4 {width: 33.33%; }
    .col-5 {width: 41.66%; }
    .col-6 {width: 50%; }
    .col-7 {width: 58.33%; }
    .col-8 {width: 66.66%; }
    .col-9 {width: 75%; }
    .col-10 {width: 83.33%; }
    .col-11 {width: 91.66%; }
    .col-12 {width: 100%; }
}