:root {
  --top-bar-height: 60px;
  --side-menu-expanded-width: 280px;
  --container-height: calc(100vh - var(--top-bar-height));
  --side-menu-toggle-width: 40px;
}

.pre-main-container {
  display: flex;
  flex-direction: row;
  height: var(--container-height);
}