.yt-navbar {
  overflow-y:auto;
}
/* width */
.yt-navbar::-webkit-scrollbar {
  width: 5px;
}

/* Track */
.yt-navbar::-webkit-scrollbar-track {
  background: #f1f1f1;
}

/* Handle */
.yt-navbar::-webkit-scrollbar-thumb {
  background: #888;
  border-radius:5px;
}

/* Handle on hover */
.yt-navbar::-webkit-scrollbar-thumb:hover {
  background: #555;
}
.yt-left-navbar { position: fixed; left: 0; top: 0; height: 100%; z-index: 10; background-color: rgb(25 25 25 / 95%); width: auto; max-width: 300px; margin-top: 4.125rem; }
.yt-navbar-content ul { padding: 1rem 0rem; list-style-type: none; }
.yt-navbar-content ul li { position: relative; display: flex; flex-wrap: wrap; flex-direction: column; }
.yt-navbar-content ul li a { font-size: 0.9rem; padding: 0.75rem 2.5rem; position: relative; width: 100%; }
.yt-navbar-content ul li a:hover { background-color: var(--theme-fusion-600); }
.yt-navbar-content ul li a:active, .yt-navbar-content ul li a.active { background-color: var(--theme-light); }

.yt-navbar ul li a[data-nb-node-type=parent]::before {
  content: "▶";
  position: absolute;
  left: 19px;
  transform:rotate(0deg);
  transition:0.2s
}

.yt-navbar ul li a[data-nb-node-type=parent][data-nb-node-status=open]::before {
  transform:rotate(90deg);
}

.yt-navbar ul li a[data-nb-node-type=parent] ~ ul{
  display:none;
  opacity: 0;
  transition: transform 0.3s;
  transform: translateY(-5%);
}
.yt-navbar ul li a[data-nb-node-type=parent][data-nb-node-status=open] ~ ul{
  transition: transform 0.3s;
}