essence.css

@import url('https://fonts.googleapis.com/css?family=Montserrat');
@import url('https://fonts.googleapis.com/css?family=Overpass');
@import url('https://fonts.googleapis.com/css?family=Abel');

html {
  background-image: url('assets/cortex.violet.jpg');
  background-size: cover;
  background-repeat: no-repeat;
}

::selection {
  color: #ffffffff;
  background-color: #ff0090;
}

body {
  margin: 0;
  margin-top: 69px;
}

p {
  font-family: 'Abel', sans-serif;
  color: #fff;
}

nav {
  position: fixed;
  top: 0;
  width: 100%;
  overflow: hidden;
}

nav li {
  display: inline;
  list-style-type: none;
  padding: 0px 2px;
}

nav .left { float: left }
nav .right { float: right; padding: 0px 42px }

#sup { color: #ffffffc0; }
#sup:after { transform-origin: left; }
#sup:hover:after { transform-origin: right; }

nav li a {
  display: inline-block;
  transition: 0.12s;
  font-family: 'Montserrat Medium', sans-serif;
  font-size: 20px;
  color: #ffffffc0;
  text-decoration: none;
  text-align: center;
  position: relative;
  padding: 7px 12px;
}

nav li a:after {
  content: '';
  background-color: #ff0090;
  width: 100%;
  height: 1.5px;
  transition: transform 0.12s ease-out;
  transform: scaleX(0);
  transform-origin: center;
  bottom: 0;
  left: 0;
  position: absolute;
}

nav li a:hover {
  color: #ffffffff;
  border-radius: 7px;
}

nav li a:hover:after {
  transform: scaleX(1);
  transform-origin: center;
}

nav li a:active {
  color: #ff0090ff;
}