html {
  box-sizing: border-box;
  font-family: "Arial Rounded MT Bold", "Helvetica Rounded", Arial, sans-serif;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(45deg, rgb(248, 77, 134) 0%, hsla(340, 100%, 55%, 0) 70%),
    linear-gradient(135deg, rgb(81, 123, 247) 10%, hsla(225, 95%, 50%, 0) 80%),
    linear-gradient(225deg, rgb(89, 248, 142) 10%, hsla(140, 90%, 50%, 0) 80%),
    linear-gradient(315deg, rgb(248, 170, 60) 100%, hsla(35, 95%, 55%, 0) 70%);
}

h2 {
  margin-top: 0;
  padding-top: .8em;
}

nav {
  position: relative;
  perspective: 600px;
}

.cool > li > a {
  color: yellow;
  text-decoration: none;
  font-size: 20px;
  background: rgba(0,0,0,0.2);
  padding: 10px 20px;
  display: inline-block;
  margin: 20px;
  border-radius: 5px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
}

.cool > li {
  position: relative;
  display: flex;
  justify-content: center;
}

.dropdown {
  opacity: 0;
  position: absolute;
  overflow: hidden;
  padding: 20px;
  top: -20px;
  border-radius: 2px;
  transition: all 0.5s;
  transform: translateY(100px);
  will-change: opacity;
  display: none;
}

.trigger-enter .dropdown {
  display: block;
}

.trigger-enter-active .dropdown {
  opacity: 1;
}

.dropdownBackground {
  width: 100px;
  height: 100px;
  position: absolute;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 50px 100px rgba(50,50,93,.1), 0 15px 35px rgba(50,50,93,.15), 0 5px 15px rgba(0,0,0,.1);
  transition: all 0.3s, opacity 0.1s, transform 0.2s;
  transform-origin: 50% 0;
  display: flex;
  justify-content: center;
  opacity: 0;
}

.dropdownBackground.open {
  opacity: 1;
}

.arrow {
  position: absolute;
  width: 20px;
  height: 20px;
  display: block;
  background: white;
  transform: translateY(-50%) rotate(45deg);
}

.bio {
  min-width: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
  line-height: 1.7;
}

.bio img {
  float: left;
  margin-right: 20px;
}

.courses {
  min-width: 300px;
}

.courses li {
  padding: 10px 0;
  display: block;
  border-bottom: 1px solid rgba(0,0,0,0.2);
}

.dropdown a {
  text-decoration: none;
  color: #ffc600;
}

a.button {
  background: black;
  display: block;
  padding: 10px;
  color: white;
  margin-bottom: 10px;
}

/* Matches Twitter, TWITTER, twitter, tWitter, TWiTTeR... */
.button[href*=twitter] { background: #019FE9; }
.button[href*=facebook] { background: #3B5998; }
.button[href*=courses] { background: #ffc600; }