.b4 .btn-outline {
  font-size: 0.875rem;
}

.b4 .btn.btn-transparent{
  padding: 10px 22px;
}

.b4 .btn-outline, .b4 .btn.btn-transparent{
  color: #e8171f; 
  background-color: #fff !important; 
  -webkit-box-shadow: inset 0px 0px 0px 2px #e8171f; 
  -moz-box-shadow: inset 0px 0px 0px 2px #e8171f; 
  box-shadow: inset 0px 0px 0px 2px #e8171f; 
  margin-bottom: 20px;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s, -webkit-box-shadow 0.15s ease-in-out;
}

.b4 .btn-outline:hover, .b4 .btn.btn-transparent:hover {
  color: #B02019;
  -webkit-box-shadow: inset 0px 0px 0px 2px #B02019;
  -moz-box-shadow: inset 0px 0px 0px 2px #B02019;
  box-shadow: inset 0px 0px 0px 2px #B02019;
}

.b4 .btn.btn-transparent img{
  filter: brightness(0) saturate(100%) invert(16%) sepia(75%) saturate(3725%) hue-rotate(346deg) brightness(103%) contrast(105%);
}

.b4 .btn.btn-transparent:hover img{
  filter: brightness(0) saturate(100%) invert(25%) sepia(69%) saturate(2830%) hue-rotate(351deg) brightness(71%) contrast(92%);
}