* {
  box-sizing: border-box;
}


/* Style the header */
header {
  background-color: #666;
  padding: 5px;
  text-align: center;
  font-size: 16px;
  color: white;
}

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  width: 20%;
  height: 90vh;
  background: #ccc;
  padding: 20px;
}

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

}
nav ul li a{
  text-decoration: none;


}

article {
  float: left;
  padding: 10px;
  width: 80%;
  background-color: #f1f1f1;
  height: 90vh;
}

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

/* Style the footer */
footer {
  background-color: #777;
  padding: 10px;
  text-align: center;
  color: white;
}
input[type=text] {
  width: 50%;
  padding: 5px ;

  display: inline-block;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

@media (max-width: 600px) {
  nav, article {
    width: 100%;
    height: auto;
  }
}