* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

/* Style the header */
header {
  padding: 20px;
  text-align: center;
}

/* Create two columns/boxes that floats next to each other */
nav {
  background: #FFFF00;
  padding: 20px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: none;
  padding: 0;
}

section {
  padding: 20px;
}

article {
  float: left;
}

aside {
  float: left;
}

/* Clear floats after the columns */
section:after {
  content: "";
  display: table;
  clear: both;
}

/* Style the footer */
footer {
  padding: 20px;
  text-align: center;
}

/* Responsive layout - makes the two columns/boxes stack on top of each other instead of next to each other, on small screens */
@media (max-width: 600px) {
  aside, article {
    width: 100%;
    height: auto;
  }
.nomobile {
            display:none;
        }
 }