.btn-check:checked + .btn, .btn.active, .btn.show, .btn:first-child:active, :not(.btn-check) + .btn:active {
  color: var(--bs-btn-active-color);
  background-color: #1f7b7a;
  border-color: var(--bs-btn-active-border-color);
}

.btn-primary {
  color: #FFFFFF;
}

.btn-lg-square {
  width: 46px;
  height: 46px;
}

.btn-square, .btn-sm-square, .btn-lg-square {
  padding-left: 0;
  padding-right: 0;
  text-align: center;
}

.back-to-top {
  position: fixed;
  display: none;
  right: 30px;
  bottom: 0;
  border-radius: 50% 50% 0 0;
  z-index: 99;
}

.btn-check:checked + .btn, .btn.active, .btn.show, .btn:first-child:active, :not(.btn-check) + .btn:active {
  color: #ffffff;
  background-color: #1d6363;
  border-color: #ffffff;
}

.btn-check:checked + .btn, .btn.active, .btn.show, .btn:first-child:active, :not(.btn-check) + .btn:active {
  color: var(--bs-btn-active-color);
  background-color: #1f7b7a;
  border-color: #811818;
}

.btn:hover {
  color: var(--bs-btn-hover-color);
  background-color: #1f7b7a;
  border-color: #ffffff;
}

.btn {
  font-weight: 700;
  transition: .5s;
}

.btn:hover {
  /*-webkit-box-shadow: 0 8px 6px -6px #555555;*/
  /*-moz-box-shadow: 0 8px 6px -6px #555555;*/
  /*box-shadow: 0 8px 6px -6px #555555;*/
}

.waves-effect, a {
  -webkit-tap-highlight-color: transparent;
}