<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width" />
    <title>A liquid layout</title>
    <style>
      body {
        font:
          1.2em Helvetica,
          Arial,
          sans-serif;
        margin: 20px;
        padding: 0;
        background-color: #eee;
      }
      .wrapper {
        width: 90%;
        margin: 2em auto;
      }

      .col1 {
        width: 25%;
        float: left;
        background-color: #fff;
  