global.css

* {
    box-sizing: border-box;
}

html {
    font-family: "Lucida Sans", sans-serif;
}

[class*="col-"] {
    float: left;
    padding: 1em;
}
.row::after {
    content: "";
    clear: both;
    display: table;
}

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

.center {
    text-align: center;
}