body {
  margin: 0;
  padding: 0;
  font-family: 'Roboto slab';
  background: #fbfbfb;
}

header {
  background: #4d7080;
  width: 100%;
  padding: 40px 0;
  color: #fff;
  text-align: center;
}

a {
  text-decoration: none;
  color: inherit;
}

nav ul {
  background: #4a6774;
  overflow: hidden;
  color: white;
  padding: 0;
  text-align: center;
  margin: 0;
  -webkit-transition: max-height 0.9s;
  -ms-transition: max-height 0.9s;
  -moz-transition: max-height 0.9s;
  -o-transition: max-height 0.9s;
  transition: max-height 0.9s;
}

nav ul li {
  display: inline-block;
  padding: 20px;
}

nav ul li:hover {
  background: #405d6a;
}

section {
  line-height: 1.5em;
  font-size: 1em;
  padding: 5%;
  width: 95%;
  margin: auto;
}

.handle {
  width: 100%;
  background: #2f4752;
  text-align: left;
  box-sizing: border-box;
  padding: 15px 10px;
  cursor: pointer;
  color: white;
  display: none;
}

i {
  display: none;
}

@media screen and (max-width:580px) {
  nav ul {
    max-height: 0;
  }
}

@media screen and (max-width:580px) {
  .showing {
    max-height: 20em;
  }
}

@media screen and (max-width:580px) {
  nav ul li {
    box-sizing: border-box;
    width: 100%;
    padding: 15px;
    text-align: left;
  }
}

@media screen and (max-width:580px) {
  .handle {
    display: block;
  }
}

@media screen and (max-width:580px) {
  i {
    display: block;
  }
}