.marquee-container {
  width: 15em; /* or whatever width you want */
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}

.marquee-text {
  display: inline-block;
  white-space: nowrap;
  padding-left: 100%;
  animation: marquee 10s linear infinite;
}

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