.paper__header {
  /* border-block-end-width: var(--border); */
  /* padding-inline: var(--size-4); */
}

.paper__titlebar {
  border-block-end-width: var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--size-1_5);
  min-height: var(--size-10);
  padding-inline: var(--size-4);
}

.paper__subbar {
  border-block-end-width: var(--border);
  display: flex;
  align-items: center;
  gap: var(--size-1_5);
  min-height: var(--size-10);
  padding-inline: var(--size-4);
  background-color: var(--paper-subbar-color, transparent);
}

.paper__content {
  block-size: 100%;
  position: relative;
  overflow: auto;
}

.paper__footer {
  border-block-start-width: var(--border);
  display: flex;
  align-items: center;
  /* gap: var(--size-1_5); */
  min-height: var(--size-10);
  padding-inline: var(--size-4);
}