.whatido {
    padding: 20px 50px;
}
.topbarcol {
    background-color: #ff00424c;
}
.bottbarcol {
    background-color: #0000424c;
}
.vislink {
    text-decoration: underline;
}
a {
    text-decoration: none; /* no underline */
}
* {
    box-sizing: border-box;
   }
   *:before,
   *:after {
    box-sizing: border-box;
   }
   html,
   body {
    height: 100%;
    position: relative;
   }
   .main-container {
    min-height: 100vh; /* will cover the 100% of viewport */
    overflow: hidden;
    display: block;
    position: relative;
    padding-bottom: 100px; /* height of your footer */
   }
   footer {
    position: absolute;
    bottom: 0;
    width: 100%;
   }