.marquee {
   width: 100%;
   overflow: hidden;
   white-space: nowrap;
}

.marquee span {
   display: inline-block;
   padding-left: 100%;
   animation: marquee 15s linear infinite;
}

@keyframes marquee {
   0%   { transform: translate(0, 0); }
   100% { transform: translate(-100%, 0); 
       
   }
}