[data-ds-part="sidebar"] {
  background-color: var(--ds-theme-color-panel);
  border-width: 1px;
  border-style: solid;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
  border-radius: var(--ds-theme-surface-radius);
  backdrop-filter: blur(var(--ds-theme-surface-blur));
  transition-property: background-color, border-color, box-shadow;
  transition-duration: 180ms;
}
[data-ds-part="composer"]:focus-visible {
  border-color: var(--ds-theme-color-accent);
}