.marquee-track { display:flex; will-change:transform; }
.marquee-outer { overflow:hidden; cursor:default; }
.marquee-outer:hover .marquee-track { animation-play-state:paused; }
.anim-left  { animation: marquee-left  linear infinite; }
.anim-right { animation: marquee-right linear infinite; }
@keyframes marquee-left  { from{ transform:translateX(0) }  to{ transform:translateX(-50%) } }
@keyframes marquee-right { from{ transform:translateX(-50%) } to{ transform:translateX(0) } }