.navbar {
  height: 3rem;
  padding: 0.7rem;
  position: sticky;
  top: 0;
  z-index: 8;

  background: rgba(255, 255, 255, 0.35); /* light tint + 35 % opacity   */
  backdrop-filter: blur(10px) saturate(120%);
}

@media (prefers-color-scheme: dark) {
  .navbar {
    background: rgba(25, 25, 25, 0.45);
    backdrop-filter: blur(10px) saturate(150%);
  }
}

.sidebar {
  height: 91vh;
  overflow-y: auto;
}
.sidebar__session-btn {
  position: absolute;
  bottom: 0.2em;
  right: 0.5em;
}