#local-player {
  width: 640px;
  height: 360px;
  background: #000;
}

#danmaku-container {
  position: fixed;
  top: 10px;
  left: 0;
  width: 100%;
  height: 100px;
  overflow: hidden;
  white-space: nowrap;
  pointer-events: none;
}

.danmaku {
  display: inline-block;
  width: auto;
  padding: 5px 10px;
  font-size: 20px;
  color: white;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 5px;
  position: absolute;
  white-space: nowrap;
  animation: move 5s linear forwards;
}

@keyframes move {
  from {
    transform: translateX(100vw);
  }
  to {
    transform: translateX(-100%);
  }
}