.logo-slider {
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}

.logo-track {
  display: inline-block;
  animation: scroll 30s linear infinite;
}

.logo-track img {
  height: 60px;
  margin: 0 20px;
  display: inline-block;
}

@keyframes scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); } /* adjust depending on logo count */
}