header {
  padding: var(--box-padding);
  display: flex;
  align-items: center;
  gap: var(--box-spacing);
  flex-shrink: 0;
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  overflow: hidden;
}

.page {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition-duration);
}

.page-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  overflow-y: auto;
  flex: 1;
}

.page-content:not(.chat-page .page-content) > * {
  width: var(--page-width);
  max-width: 100%;
  align-self: center;
}

.chat-page .page-content {
  width: var(--page-width);
  max-width: 100%;
  align-self: center;
}