.bz-ui-cleanup-r4 .bz-transport-group > .bz-transport-letter {
  display: inline-grid !important;
  place-items: center;
}

.bz-ui-cleanup-r4 #fullscreenButton {
  width: 42px;
  min-width: 42px;
  padding-inline: 0;
  font-size: 19px;
}

.bz-ui-cleanup-r4 #projectPanel > header {
  position: relative;
  min-height: 48px;
}

.bz-ui-cleanup-r4 .bz-r4-track-controls {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.bz-ui-cleanup-r4 .bz-r4-region-browser {
  position: absolute;
  left: max(12px, calc(50% - 355px));
}

.bz-ui-cleanup-r4 .session-media-menu-e23:not(.session-mode-menu-e23) {
  min-width: 270px;
}

.bz-ui-cleanup-r4 .session-media-menu-e23 .bz-r4-track-add {
  display: block;
  width: 38px;
  min-height: 32px;
  margin: 6px auto 10px;
  padding: 0;
  border-radius: 9px;
  color: #ff8b45;
  font-size: 20px;
  font-weight: 800;
}

.bz-ui-cleanup-r4 .bz-r4-empty-project-entry {
  color: inherit;
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  font-weight: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: rgba(255,116,23,.6);
  text-underline-offset: 5px;
}

.bz-ui-cleanup-r4 .bz-r4-empty-project-entry:hover,
.bz-ui-cleanup-r4 .bz-r4-empty-project-entry:focus-visible {
  color: #ff9a57;
}

#mainMenuPanel .bz-r4-menu-separator {
  width: calc(100% - 16px);
  height: 1px;
  margin: 5px 8px;
  border: 0;
  background: var(--line,#35424b);
  opacity: .8;
}

@media (max-width: 1050px) {
  .bz-ui-cleanup-r4 .bz-r4-track-controls,
  .bz-ui-cleanup-r4 .bz-r4-region-browser {
    position: static;
    transform: none;
  }
}