/* ── Directory ───────────────────────────────────────────── */
.dir-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-5);
  min-height: 500px;
  min-width: 0;
}

.dir-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dir-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}
.dir-panel-title { font-size: var(--text-sm); font-weight: 600; display: flex; align-items: center; gap: var(--space-2); }
.dir-panel-header .btn-ghost {
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
}
.dir-panel-header .btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-color: var(--bg-hover);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-muted);
  overflow-x: auto;
  scrollbar-width: none;
  flex-shrink: 0;
}
.breadcrumb::-webkit-scrollbar { display: none; }
.breadcrumb-item { color: var(--text-muted); cursor: pointer; white-space: nowrap; transition: color var(--transition-fast); }
.breadcrumb-item:hover { color: var(--text-link); }
.breadcrumb-item.current { color: var(--text-secondary); cursor: default; }
.breadcrumb-sep { color: var(--border); }

/* Tree */
.dir-tree {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) 0;
}
.tree-node { user-select: none; }

.tree-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  position: relative;
  min-height: 36px;
}
.tree-row:hover,
.tree-row:focus-visible { background: var(--bg-hover); }
.tree-row.selected { background: var(--accent-light); color: var(--accent); }
.tree-row.context-open { background: var(--bg-hover); }

.tree-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}
.tree-toggle.open { transform: rotate(90deg); }
.tree-toggle.leaf { visibility: hidden; }

.tree-icon { display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.tree-icon-folder  { color: var(--warning); }
.tree-icon-js      { color: #f7df1e; }
.tree-icon-html    { color: #e34c26; }
.tree-icon-css     { color: #264de4; }
.tree-icon-python  { color: #3572a5; }
.tree-icon-image   { color: #a855f7; }
.tree-icon-data    { color: var(--success); }
.tree-icon-file    { color: var(--text-muted); }

.tree-label { font-size: var(--text-sm); color: var(--text-primary); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-row.selected .tree-label { color: var(--accent); }

.tree-meta { font-size: var(--text-xs); color: var(--text-muted); white-space: nowrap; }

/* Indent guides */
.tree-children {
  overflow: hidden;
  transition: height var(--transition-base);
}
.tree-children-inner { padding-left: var(--space-5); position: relative; }
.tree-children-inner::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

/* Context menu */
.context-menu {
  position: fixed;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-palette);
  padding: var(--space-1) 0;
  min-width: 180px;
  max-width: calc(100vw - 16px);
  animation: scaleIn 0.15s ease;
}
.context-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
}
.context-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.context-item.danger:hover { background: var(--danger-light); color: var(--danger); }
.context-sep { height: 1px; background: var(--border); margin: var(--space-1) 0; }

/* Detail panel */
.dir-detail {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.dir-detail-icon { width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; background: var(--bg-hover); border-radius: var(--radius-xl); }
.dir-detail-name { font-size: var(--text-xl); font-weight: 700; }
.dir-detail-path { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted); background: var(--bg-hover); padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); word-break: break-all; }
.dir-meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.dir-meta-item label { font-size: var(--text-xs); color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: 2px; }
.dir-meta-item span  { font-size: var(--text-sm); color: var(--text-secondary); }

.dir-empty { display: flex; align-items: center; justify-content: center; flex: 1; color: var(--text-muted); font-size: var(--text-sm); flex-direction: column; gap: var(--space-4); text-align: center; }

@media (max-width: 900px) {
  .dir-layout { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .dir-panel,
  .dir-detail { min-width: 0; }
  .dir-tree { max-height: 45dvh; }
  .dir-detail { padding: var(--space-4); }
  .dir-meta-grid { grid-template-columns: 1fr; }
}

@media (hover: none), (pointer: coarse) {
  .tree-row,
  .context-item {
    min-height: 44px;
  }
}