Simple css grid

Simple css grid

<div class="container">
    <div class="grid grid-pad">
        <section class="col-1-3">
            text
        </section>
        <section class="col-1-3">
            text
        </section>
        <section class="col-1-3">
            text
        </section>
    </div>
    <div class="grid grid-pad">
        <section class="col-1-1">
            text
        </section>
    </div>
</div>

style.css

* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.container {
  max-width: 940px;
  margin-right: auto;
  margin-left: auto;
}
/* GRID 
***************/ 

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

[class*='col-'] {
  float: left;
  padding-right: 20px;
}
.grid [class*='col-']:last-of-type {
  padding-right: 0;
}

.col-1-1 {
  width: 100%;
}

.col-2-3 {
  width: 66.66%;
}

.col-1-3 {
  width: 33.33%;
}

.col-1-2 {
  width: 50%;
}

.col-1-4 {
  width: 25%;
}

.col-3-4 {
  width: 75%;
}

.col-4-5 {
  width: 80%;
}

.col-1-6 {
  width: 16.66%;
}

.col-1-8 {
  width: 12.5%;
}

.grid-pad {
  padding-left: 20px
}

.grid-pad [class*='col-'] {
  padding-top: 20px;
  padding-top: 20px;
}

.grid-pad [class*='col-']:last-of-type {
  padding-right: 20px;
}

@media (max-width: 767px) {
  [class*='col-'] {
    width: 100%;
  }
}