.contact_slider {  
    position: fixed;    
    left: -370px;    
    top: 120px;     
    z-index: 99997; 
}

/*----- Icons -----*/
   .contact_slider .tab-links .contact_icon{
    height: 45px;
    width: 45px;
    cursor: pointer;
    position: relative;
    z-index: 99998;
    display: block;
    top: 50px;
    left: 370px;
}
.contact_slider .tab-links .contact_icon:before {
font-family: FontAwesome;
  content:  "\f0e0";    
    color: #fff;
    font-size: 20px;
    position: absolute;
    font-weight: 100;
-webkit-transition: all ease 0.3s;
  -moz-transition: all ease 0.3s;
  -o-transition: all ease 0.3s;
  -ms-transition: all ease 0.3s;
  transition: all ease 0.3s;
  text-shadow: none;
   left: calc(50% - 10px);
    top: calc(50% - 15px);
}
 .contact_slider .tab-links .contact_icon:hover {
    -webkit-transform:scale(1.1);
    transform:scale(1.1);
    z-index: 99999;
   }