markdown_editor/static/css/file-tree.css

/* Bootstrap-styled File Tree */
.file-tree {
    font-size: 13px;
    user-select: none;
    padding: 8px 0;
}

.tree-node-wrapper {
    margin: 0;
}

.tree-node {
    padding: 6px 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    border-radius: 4px;
    margin: 1px 4px;
    color: var(--text-primary);
    transition: all 0.15s ease;
    white-space: nowrap;
    overflow: visible;
    text-overflow: ellipsis;
    min-height: 28px;
}

.tree-node:hover {
    background-color: var(--bg-tertiary);
}

.tree-node.active {
    color: var(--link-color);
    font-weight: 500;
}

.tree-node.active:hover {
    filter: brightness(1.2);
}

.tree-node.active .tree-node-icon {
    color: var(--link-color);
}

/* Toggle arrow */
.tree-node-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: transform 0.2s ease;
    position: relative;
    z-index: 1;
    overflow: visible;
    cursor: pointer;
}

.tree-node-toggle.expanded {
    transform: rotate(90deg);
}

.tree-node-toggle:hover {
    color: var(--link-color);
}

/* Icon styling */
.tree-node-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--text-secondary);
}

/* Content wrapper */
.tree-node-content {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.tree-node-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.file-size-badge {
    font-size: 10px;
    color: var(--text-secondary);
    margin-left: auto;
    flex-shrink: 0;
    padding: 2px 6px;
    background-color: var(--bg-tertiary);
    border-radius: 3px;
}

/* Children container */
.tree-children {
    margin-left: 8px;
    border-left: 1px solid var(--border-light);
    padding-left: 4px;
    max-height: 100%;
    overflow: visible;
}

.tree-children.collapsed {
    display: none;
}

/* Drag and drop */
/* Default cursor is pointer, not grab (only show grab after long-press) */
.tree-node {
    cursor: pointer;
}

/* Show grab cursor only when drag is ready (after long-press) */
.tree-node.drag-ready {
    cursor: grab !important;
}

.tree-node.drag-ready:active {
    cursor: grabbing !important;
}

.tree-node.dragging {
    opacity: 0.4;
    background-color: var(--bg-tertiary);
    cursor: grabbing !important;
}

.tree-node.drag-over {
    background-color: rgba(13, 110, 253, 0.15) !important;
    border: 2px dashed var(--link-color) !important;
    box-shadow: 0 0 8px rgba(13, 110, 253, 0.3);
}

/* Root-level drop target highlighting */
.file-tree.drag-over-root {
    background-color: rgba(13, 110, 253, 0.08);
    border: 2px dashed var(--link-color);
    border-radius: 6px;
    box-shadow: inset 0 0 12px rgba(13, 110, 253, 0.2);
    margin: 4px;
    padding: 4px;
}

/* Only show drag cursor on directories when dragging */
body.dragging-active .tree-node[data-isdir="true"] {
    cursor: copy;
}

body.dragging-active .tree-node[data-isdir="false"] {
    cursor: no-drop;
}

/* Show move cursor when hovering over root-level empty space */
body.dragging-active .file-tree.drag-over-root {
    cursor: move;
}

/* Collection selector - Bootstrap styled */
.collection-selector {
    margin: 12px 8px;
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.collection-selector .form-label {
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 12px;
    color: var(--text-secondary);
}

.collection-selector .form-select-sm {
    padding: 4px 8px;
    font-size: 13px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.collection-selector .form-select-sm:focus {
    border-color: var(--link-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Dark mode adjustments */
body.dark-mode .tree-node:hover {
    background-color: var(--bg-tertiary);
}

body.dark-mode .tree-node.active {
    color: var(--link-color);
}

body.dark-mode .tree-node.active .tree-node-icon {
    color: var(--link-color);
}

body.dark-mode .tree-node.active .tree-node-icon .tree-node-toggle {
    color: var(--link-color);
}

body.dark-mode .tree-children {
    border-left-color: var(--border-color);
}

/* Empty directory message */
.tree-empty-message {
    padding: 8px 12px;
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
    user-select: none;
}

body.dark-mode .tree-empty-message {
    color: var(--text-secondary);
}

/* Scrollbar in sidebar */
.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}

.new-collection-btn {
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    background-color: transparent;
}