Разработка Красиво выделяем ссылки (hover)

@keyframes backgroundGradient {
  0% {
    background-position: 50% 0%;
  }
  50% {
    background-position: 50% 100%;
  }
  100% {
    background-position: 50% 0%;
  }
}
@keyframes loadBounce {
  0% {
    transform: translate(-50%, -50%) scale(0);
  }
  40% {
    transform: translate(-50%, -50%) scale(1.2);
  }
  60% {
    transform: translate(-50%, -50%) scale(1);
  }
  80% {
    transform: translate(-50%, -50%) scale(1.1);
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
  }
}
body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  font-family: "Open Sans", sans-serif;
  background: linear-gradient(180deg, #111, #00393c);
  background-size: 400% 400%;
  animation: backgroundGradient 30s ease infinite;
}

h1,
h2,
h3,
h4 {
  font-family: "Roboto", sans-serif;
  font-weight: 900;
  color: #fff;
}

p {
  font-size: 18px;
  font-size: 1.8rem;
  line-height: 26px;
}

.m-linkitem {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-51%, -50%);
  -moz-transform: translate(-51%, -50%);
  -ms-transform: translate(-51%, -50%);
  -o-transform: translate(-51%, -50%);
  transform: translate(-51%, -50%);
  max-width: 500px;
  width: 100%;
  transform-origin: center;
  animation: loadBounce 0.5s ease-in-out forwards;
}
.m-linkitem a {
  transition: all 1s linear;
  display: inline;
  font-size: 22px;
  font-size: 2.2rem;
  line-height: 45px;
  color: #fff;
  text-decoration: none;
  text-transform: uppercase;
  font-weight: 600;
  padding-bottom: 5px;
  background: linear-gradient(to right, #00d1b1 0%, #278fc6 98%);
  background-size: 0px 2px;
  background-repeat: no-repeat;
  background-position: left 85%;
  text-shadow: 0;
}
.m-linkitem a:hover {
  background-size: 100% 2px;
  text-shadow: 0 2.5px 4px rgba(0, 0, 0, 0.5);
}