* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: .75em;
  background: url("https://durhamcollege.ca/wp-content/uploads/Computer-Programmer.jpg") no-repeat;
  background-size: cover;
}

/* Advanced Checkbox Hack */
body {
  -webkit-animation: bugfix infinite 1s;
}

@-webkit-keyframes bugfix {
  from {
    padding: 0;
  }
  to {
    padding: 0;
  }
}
input[type=checkbox] {
  position: absolute;
  top: -9999px;
  left: -9999px;
}

label {
  display: none;
  cursor: pointer;
  user-select: none;
}

/* background for li / select */
/* custom-dropdown */
nav[role="custom-dropdown"] {
  position: relative;
  width: 100%;
}
nav[role="custom-dropdown"] a,
nav[role="custom-dropdown"] label {
  color: azure;
  text-decoration: none;
  font: 1.4em sans-serif;
  transition: color .3s ease-in-out;
}
nav[role="custom-dropdown"] ul {
  padding: 0;
  margin: 0 auto;
  width: 100%;
  list-style: none;
}
nav[role="custom-dropdown"] ul > li {
  float: left;
  padding: .55em .55em;
  width: 19%;
  background-color:Teal;
  text-align: center;
  transition-duration: .3s;
  transition-timing-function: ease-in-out;
  transition-property: box-shadow, color;
  box-shadow: 0 0.05em 0.25em 0 rgba(0, 0, 0, 0.35);
  cursor: pointer;
}
nav[role="custom-dropdown"] ul > li:hover {
  background-color: MediumOrchid;
  color: white;
  box-shadow: 0 0.05em 0.25em 0 rgba(0, 0, 0, 0.35), inset 0 0 0 2em rgba(0, 0, 0, 0.3);
}
nav[role="custom-dropdown"] ul > li:hover > a {
  color: white;
}

/* small screens */
@media screen and (max-width: 44em) {
  html,
  body {
      background: url("http://tvoemisto.tv/media/gallery/full/i/t/it_226b0.jpg") no-repeat;
  background-size: cover;
    margin: 0;
  }

  nav[role="custom-dropdown"] ul {
    display: none;
    height: 100%;
  }
  nav[role="custom-dropdown"] label {
    position: relative;
    display: block;
    width: 100%;
    min-height: 2.25em;
    padding: .45em;
    font-size: 1.1em;
    margin: 0;
    border: 0.15em solid rgba(60, 60, 60, 0.2);
    background-color:DarkMagenta;
  }
  nav[role="custom-dropdown"] label:after {
    position: absolute;
    right: .25em;
    top: 0;
    content: "\2261";
    font-size: 1.8em;
  }
  nav[role="custom-dropdown"] input[type=checkbox]:checked ~ label:after {
    color: lightseegreen;
  }
  nav[role="custom-dropdown"] input[type=checkbox]:checked ~ ul {
    display: block;
  }
  nav[role="custom-dropdown"] input[type=checkbox]:checked ~ ul > li {
    width: 100%;
    opacity: .8;
    text-align: left;
  }
  nav[role="custom-dropdown"] input[type=checkbox]:checked ~ ul > li:after {
    position: absolute;
    right: .25em;
    content: "\203A";
    font: bold 1.4em sans-serif;
  }
}