jitsi-roomsv2/frontend/src/components/sidebar/Sidebar.css

.sidebar {
  display: flex;
  flex-direction: column;
}

.sidebar-footer {
  margin-top: auto;
}

.sidebar-small {
  min-width: 60px;
  max-width: 60px;
}

.sidebar-hidden > .sidebar-footer {
  position: absolute;
  bottom: 0;
}