@keyframes pulsate {  
0%, to {  
opacity: 1;  
}  
50% {  
opacity: .2;  
}  
}  
  
#spotlight {  
position: fixed;  
top: -1px;  
bottom: -1px;  
width: 100%;  
z-index: 99999;  
color: #fff;  
background-color: #000;  
opacity: 0;  
overflow: hidden;  
-webkit-user-select: none;  
-ms-user-select: none;  
user-select: none;  
transition: opacity .2s ease-out;  
font-family: Arial, sans-serif;  
font-size: 16px;  
font-weight: 400;  
contain: strict;  
touch-action: none;  
pointer-events: none;  
}  
  
#spotlight.show {  
opacity: 1;  
transition: none;  
pointer-events: auto;  
}  
  
#spotlight.white {  
color: #212529;  
background-color: white;  
}