@media (max-width: 900px) { 
.btn-sticky {
  position: fixed;
  bottom: 0%;
    width: 95%;
  -webkit-transform: translateY(0%);
  -ms-transform: translateY(0%);
  transform: translateY(0%);
        z-index: 1000;
}
}

@media (min-width: 901px) {     
.btn-sticky {
position: fixed;
top: 50%;
right: 1%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
transform: translateY(-50%);
max-width: 75px;
        z-index: 1000;
}
}

@media (min-width: 1200px) {     
.btn-sticky {
position: fixed;
top: 50%;
right: 1%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
transform: translateY(-50%);
    max-width: 78px;
        z-index: 1000;
}
}

@media (min-width: 1500px) {     
.btn-sticky {
position: fixed;
top: 50%;
right: 5%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
transform: translateY(-50%);
    max-width: 78px;
        z-index: 1000;
}
}


@media (min-width: 1900px) { 
.btn-sticky {
position: fixed;
top: 50%;
right: 14%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
transform: translateY(-50%);
        z-index: 1000;
}
}



.btn-sticky a {
  display: block;
  text-align: center;
  padding: 12px;
  transition: all 0.3s ease;
  color: white;
}

.btn-sticky a:hover {
  background-color: #000;
}