.underline:after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 8px;
  border-radius: 5px;
  background: #bebee7;
  z-index: -1;
}

@media (min-width: 300px) {
  .btn {
  }
}

@media (min-width: 576px) {
  .btn {
  }
}

@media (min-width: 300px) {
  .container .feature {
  }
}