/* HORIZONTAL MENU */

body,
header h1 {
  margin: 0;
}

header {
  background: #ccc;
  padding: 0.25em;
  text-align: center;
}

nav {
  display: flex;
  justify-content: center;
  background: #333;
}
nav a {
  padding: 1.25em 1.5em;
  color: #ccc;
  background: #555;
  text-decoration: none;
  transition: all 1.5s;
}
nav a:hover {
  color: #dfd;
  background: #797;
}

main {
  padding: 0 10px;
}

/* VERTICAL MENU */

/*
 simply uncomment the style blocks below to override the CSS above.
 'float' isn't ideal for layout, but works okay with two elements
*/

/* 
nav {
  flex-direction: column;
  width: 15%;
  float: left;
}
main {
  width: 85%;
  float: right;
  box-sizing: border-box;
}
*/