discourse/plugins/chat/assets/stylesheets/mobile/chat-navbar.scss

.c-navbar {
  gap: 0.75rem;
  &-container {
    max-width: 100vw;
    padding-inline: 0.25rem;
  }
  &__actions {
    margin-right: 0.5rem;
  }
  &__back-button {
    align-self: stretch;
  }
}