/* ============================================================
   sitemap.css — Tree View Style for Sitemap
   ============================================================ */

.tree-container {
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--color-border);
  border-radius: var(--r-card);
  padding: 24px;
  background: var(--color-bg-2);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--sp-4);
}

.tree-container ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tree-container ul ul {
  margin-left: 11px;
  padding-left: 11px;
  position: relative;
}

/* The vertical drawing line */
.tree-container ul ul::before {
  content: "";
  position: absolute;
  top: 0; left: -1px; width: 1px; height: 100%;
  background-color: var(--color-border);
  transform-origin: top;
  animation: drawLineY 0.5s ease-out forwards;
}

.tree-item {
  position: relative;
  margin-top: 4px;
}

/* The horizontal drawing line */
.tree-container ul ul .tree-item::before {
  content: "";
  position: absolute;
  left: -11px;
  top: 14px;
  width: 11px;
  height: 1px;
  background-color: var(--color-border);
  transform-origin: left;
  animation: drawLineX 0.3s ease-out forwards;
}

@keyframes drawLineX {
  0% { transform: scaleX(0); opacity: 0; }
  100% { transform: scaleX(1); opacity: 1; }
}
@keyframes drawLineY {
  0% { transform: scaleY(0); opacity: 0; }
  100% { transform: scaleY(1); opacity: 1; }
}

.tree-label,
.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-1);
  transition: background-color 0.2s;
  user-select: none;
  text-decoration: none;
  height: 28px;
}

.tree-label:hover,
.file-item:hover {
  background-color: var(--color-bg-3);
}

.is-selected {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

.tree-icon {
  width: 16px;
  height: 16px;
  color: var(--color-text-2);
  flex-shrink: 0;
}

.folder-open-icon { display: none; }
.folder-closed-icon { display: block; }

.tree-toggle:checked ~ .tree-label .folder-open-icon {
  display: block;
  color: var(--color-text-1);
}
.tree-toggle:checked ~ .tree-label .folder-closed-icon {
  display: none;
}

.tree-toggle { display: none; }

.tree-children-wrapper {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease-in-out;
}

.tree-children { overflow: hidden; }

/* State: Open */
.tree-toggle:checked ~ .tree-children-wrapper {
  grid-template-rows: 1fr;
}