#post-list {
  max-height: 500px;
  overflow-y: auto;
  padding-right: 8px;
  border: 1px solid #ddd;
  border-radius: 8px;
}

#post-list::-webkit-scrollbar {
  width: 6px;
}

#post-list::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}