.up-btn {
  right: 44px;
  bottom: 75px;
  width: 50px;
  height: 50px;
  border-radius: 50px;
  line-height: 50px;
  position: fixed;
  background-color: #615f5b;
  text-align: center;
  border: none;
  z-index: 99;
  box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
  -webkit-box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
  -moz-box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
  cursor: pointer;
  -webkit-transition: all 0.4s ease;
  -moz-transition: all 0.4s ease;
  -o-transition: all 0.4s ease;
  transition: all 0.4s ease;

  display: none;
}

.up-btn svg {
  width: 20px;
  height: auto;
}

.up-btn:hover {
  transform: scale(1.2);
}


@media only screen and (max-width: 767px) {
  .up-btn {
    right: 30px;
    bottom: 75px;
    width: 42px;
    height: 40px;
    border-radius: 40px;
    line-height: 40px;
    position: fixed;
    background-color: #615f5b;
    text-align: center;
    border: none;
    z-index: 99;
    box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
    -webkit-box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
    -moz-box-shadow: 4px 4px 6px rgba(76, 77, 75, 0.35);
    cursor: pointer;
    -webkit-transition: all 0.4s ease;
    -moz-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    transition: all 0.4s ease;
  
    display: none;
  }
  
  .up-btn svg {
    width: 18px;
    height: auto;
  }
  
  .up-btn:hover {
    transform: none;
  }
  

}