/* 본문 오른쪽 접는 패널 여럿 — 접힌 패널 = 세로 글 띠 · 편 패널 = 공유 폭(--ui-side-panels-width) */

/* 부르는 쪽 칸 — [본문, 패널 묶음] */
.ui-side-panels-row {
  display: flex;
  align-items: stretch;
  min-width: 0;
}

.ui-side-panels-row[hidden] {
  display: none;
}

.ui-side-panels-row > :first-child {
  flex: 1 1 auto;
  min-width: 0;
}

.ui-side-panels {
  display: flex;
  flex: none;
  align-items: stretch;
  gap: var(--spacing-4);
  margin-left: var(--spacing-8);
}

.ui-side-panels.is-resizing {
  user-select: none;
}

.ui-side-panels__strip {
  flex: none;
  width: 32px;
  padding: var(--spacing-8) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-cards);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font: inherit;
  font-size: var(--text-body-sm);
  font-weight: 600;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-align: start;
  cursor: pointer;
}

.ui-side-panels__strip:hover,
.ui-side-panels__strip:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.ui-side-panels__panel {
  position: relative;
  display: flex;
  flex: none;
  flex-direction: column;
  width: var(--ui-side-panels-width, 420px);
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-cards);
  background: var(--color-surface);
}

.ui-side-panels__strip[hidden],
.ui-side-panels__panel[hidden] {
  display: none;
}

/* 왼쪽 경계 — 끌기 · 화살표 키 */
.ui-side-panels__grip {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -5px;
  width: 8px;
  cursor: col-resize;
  touch-action: none;
  z-index: 1;
}

.ui-side-panels__grip:hover,
.ui-side-panels__grip:focus-visible,
.ui-side-panels.is-resizing .ui-side-panels__grip {
  background: var(--color-primary);
  opacity: 0.4;
}

.ui-side-panels__head {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  padding: var(--spacing-8) var(--spacing-12);
  border-bottom: 1px solid var(--color-border);
}

.ui-side-panels__title {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--color-text);
}

.ui-side-panels__fold {
  flex: none;
  padding: 0 var(--spacing-4);
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text-secondary);
  font: inherit;
  cursor: pointer;
}

.ui-side-panels__fold:hover,
.ui-side-panels__fold:focus-visible {
  color: var(--color-primary);
}

.ui-side-panels__body {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  padding: var(--spacing-12);
  overflow: auto;
}