Fill Up

.btn-fill-up {
  display: inline-block;
  padding: 12px 26px;
  border: 2px solid #10b981;
  border-radius: 10px;
  background: transparent;
  color: #10b981;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: box-shadow 0.3s ease, color 0.3s ease;
}
.btn-fill-up:hover {
  box-shadow: inset 0 -3.5em 0 0 #10b981;
  color: #ecfdf5;
}
.btn-fill-up:active {
  border-color: #059669;
}