.agent-history-rail{scrollbar-width:thin;-webkit-mask-image:linear-gradient(90deg,#000 0 calc(100% - 28px),#0000 100%);mask-image:linear-gradient(90deg,#000 0 calc(100% - 28px),#0000 100%)}@supports (animation-timeline:scroll(self inline)){.agent-history-rail{animation:linear both agent-history-rail-edge;animation-timeline:scroll(self inline);animation-range:contain}@keyframes agent-history-rail-edge{to{-webkit-mask-image:linear-gradient(90deg,#000 0 100%,#000 100%);mask-image:linear-gradient(90deg,#000 0 100%,#000 100%)}}}