simple css 12 column grid

grid.css

* {
    box-sizing: border-box;
}

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

.col, [class*="col-"] {
    float: left;
    padding: 15px;
    display: block;
    outline: 1px dashed #848484;
    vertical-align: top;
}


.col, .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%;
}