*,
*:before,
*:after {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  background-color: #121317;
}
nav {
  height: 100vh;
  width: 70vw;
  min-width: 600px;
  display: flex;
  align-items: baseline;
  justify-content: space-around;
  margin: auto;
}
a {
  position: relative;
  text-decoration: none;
  font-family: "Poppins", sans-serif;
  color: #a0a0a0;
  font-size: 18px;
  letter-spacing: 0.5px;
  padding: 0 10px;
}
a:before,
a:after {
  content: "";
  position: absolute;
  height: 3px;
  width: 0;
  background-color: #18f08b;
  transition: 0.5s;
}
a:after {
  left: 0;
  bottom: -10px;
}
a:before {
  right: 0;
  top: -10px;
}
a:hover {
  color: #ffffff;
}
a:hover:after,
a:hover:before {
  width: 100%;
}