<a href="/contact" class="cs-button-5">
    <span class="cs-button-text">Scopri Ora</span>
</a>

.cs-button-5 {
  text-align: center;
  font-size: 1rem;
  line-height: 3.5rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.05em;
  min-width: 10.875rem;
  margin: 0;
  color: #1a1a1a;
  padding: 0 1.5rem;
  box-sizing: border-box;
  background-color: transparent;
  border: 2px solid #1a1a1a;
  display: inline-block;
  position: relative;
  z-index: 1;
  transition: color 0.3s;
}
.cs-button-5 .cs-button-text {
  display: block;
  transform: translateY(-0.125rem);
  transition: transform 0.3s, color 0.3s, letter-spacing 0.3s;
}
.cs-button-5:before {
  content: "";
  width: 100%;
  height: 0.375rem;
  background: #1a1a1a;
  opacity: 1;
  position: absolute;
  display: block;
  bottom: 0;
  left: 0;
  transition: height 0.3s;
  z-index: -1;
}
.cs-button-5:hover .cs-button-text {
  color: #fff;
  letter-spacing: 0.15em;
}
.cs-button-5:hover .cs-button-text {
  transform: translateY(0);
}
.cs-button-5:hover:before {
  height: 100%;
}