body {
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(deepskyblue, navy);
}

ul {
  padding: 0;
  list-style-type: none;
  display: flex;
  flex-direction: column;
  align-items: center;
}

ul li {
  color: #ddd;
  font-size: 25px;
  font-family: sans-serif;
  text-transform: uppercase;
  position: relative;
  transition: 0.3s;
  cursor: pointer;
  overflow: hidden;
  margin: 0.5em;
}

ul li:hover {
  color: #fff;
}

ul li::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: tomato;
  left: -100%;
  transition: 0.4s ease-out;
}

ul li:hover::before {
  left: 100%;
}

ul li::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 0.2em;
  background: tomato;
  bottom: 0;
  left: 100%;
  transition: 0.3s 0.3s ease-out;
}

ul li:hover::after {
  left: 0%;
}