a#open_preferences_center {
	position: fixed;
    bottom: 1%;
    background-color: #ffd959;
    color: #45403c;
    padding: 1%;
    Left: 0.5%;
    font-weight: 700;
    text-transform: uppercase;
    z-index: 1;
}

/* pulse animation */
a#open_preferences_center:hover {animation: pulse 2.5s infinite; border-radius: 4px;}

@keyframes pulse {
  0% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 0px transparent;}
  10% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 1px #eb5c9d;}
  20% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 2px #f39323;}
  30% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 3px #feca1a;}
  40% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 4px #8ec045;}
  50% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 4px #55b14b;}
  60% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 3px #65bfac;}
  70% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 2px #00a4e3;}
  80% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 1px #7671b2;}
  90% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 0px #000000;}
  100% {-moz-box-shadow: 0 0 0 2.5px #ce8da0;box-shadow: 0 0 0 0px transparent;}
}

a#open_preferences_center:nth-child(1){
    -webkit-animation-delay: 0.1s;
}

/* pulse animation */