/* Construction pages — Canvas Share–style folder sidebar (subset of canvas-share.html) */

.app-body--canvas {
  display: flex;
  align-items: stretch;
  flex: 1;
  min-height: 0;
}

.canvas-folder-panel {
  width: 278px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid #c8ccd8;
  padding: calc(var(--s8) * 2) var(--s8);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.canvas-folder-panel__section[hidden] {
  display: none !important;
}

.canvas-folder-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s8);
  margin-bottom: var(--space-field);
}

.canvas-folder-panel__header .sidebar-section-title {
  margin: 0;
}

.canvas-folder-panel__subtle {
  margin: 0 0 var(--space-field);
  color: #6a6f83;
  font-size: 0.78rem;
  line-height: 1.4;
}

.canvas-folder-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.canvas-folder-tree__list > li + li {
  margin-top: 2px;
}

.canvas-folder-tree__branch {
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
}

.canvas-folder-tree__branch + .canvas-folder-tree__branch {
  margin-top: 10px;
}

.canvas-folder-tree__branch-summary {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  cursor: pointer;
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6b7088;
  padding: 8px calc(var(--s8) * 1.25) 6px;
  margin: 0;
  border-radius: 4px;
  user-select: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.canvas-folder-tree__branch-summary::-webkit-details-marker {
  display: none;
}

.canvas-folder-tree__branch-summary::marker {
  content: '';
}

.canvas-folder-tree__branch-summary:hover {
  background: rgba(255, 255, 255, 0.35);
  color: #4b5066;
}

.canvas-folder-tree__branch-summary:focus-visible {
  outline: 2px solid var(--brand-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

.canvas-folder-tree__chev {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: #8a8fa3;
  transition: transform 0.2s ease, color 0.15s ease;
}

.canvas-folder-tree__chev svg {
  width: 10px;
  height: 10px;
}

.canvas-folder-tree__branch:not([open]) .canvas-folder-tree__chev {
  transform: rotate(-90deg);
}

.canvas-folder-tree__branch-list {
  list-style: none;
  margin: 2px 0 4px 0;
  padding: 0 0 2px 14px;
  border-left: 1px solid rgba(90, 97, 110, 0.22);
  margin-left: 11px;
}

.canvas-folder-tree__branch-list > li + li {
  margin-top: 2px;
}

.canvas-folder-tree__item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  padding: var(--s8) calc(var(--s8) * 1.25);
  margin-bottom: 2px;
  border: none;
  border-radius: 4px;
  background: transparent;
  font-size: 0.78rem;
  color: var(--sidebar-text);
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  box-sizing: border-box;
  transition: background 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}

.canvas-folder-tree__item:hover {
  background: rgba(255, 255, 255, 0.55);
  transform: translateX(2px);
}

.canvas-folder-tree__item.is-active {
  background: #fff;
  color: var(--sidebar-active);
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.canvas-folder-tree__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.82;
  color: #5c6175;
}

.canvas-folder-tree__item.is-active .canvas-folder-tree__icon {
  color: var(--sidebar-active);
  opacity: 1;
}

@media (max-width: 900px) {
  .app-body--canvas {
    position: relative;
  }

  .canvas-folder-panel {
    position: fixed;
    z-index: 90;
    top: 56px;
    left: 0;
    height: calc(100vh - 56px);
    max-height: calc(100vh - 56px);
    transform: translateX(-100%);
    transition: transform 0.16s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  }

  .app-body.app-body--sidebar-open .canvas-folder-panel {
    transform: translateX(0);
  }
}