body {
justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: verdana, arial;
 }
 
 body a {
  text-decoration: none;
 }
 
 .letter {
	margin-top: 40px;
}
 
 .column {
  float: left;
  width: 33.33%;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

.hover-underline {
  font-size: .8rem;
  font-weight: bold;
  color: #ffffff;
  position: relative;
  display: inline-block;
}

.hover-underline::after,
.hover-underline::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, #ff0000, #00ffff);
  bottom: -2px;
  left: 0;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease-out;
}

.hover-underline::before {
  top: -2px;
  transform-origin: left;
}

.hover-underline:hover::after,
.hover-underline:hover::before {
  transform: scaleX(1);
}

@media screen and (max-width: 600px) {
  .column {
    width: 100%;
  }
}