leptos-column-browser 0.1.1

A multi-pane column browser component for Leptos — navigate deeply nested hierarchies like macOS Finder
Documentation 
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/**
 * leptos-column-browser default theme (Catppuccin Mocha)
 *
 * Override any of these variables on :root or a parent element.
 *
 * --lcb-bg           Background of the root browser container.
 * --lcb-column-bg    Background of each individual column.
 * --lcb-border       Colour of the vertical column separators.
 * --lcb-item-hover   Background of an item on mouse hover.
 * --lcb-selected     Background of the currently selected item.
 * --lcb-text         Primary text colour.
 * --lcb-text-muted   Secondary / de-emphasised text colour.
 * --lcb-accent       Icon fill colour, focus ring, and resize handle highlight.
 */
:root {
    --lcb-bg:           #1e1e2e;
    --lcb-column-bg:    #181825;
    --lcb-border:       #313244;
    --lcb-item-hover:   #313244;
    --lcb-selected:     #45475a;
    --lcb-text:         #cdd6f4;
    --lcb-text-muted:   #6c7086;
    --lcb-accent:       #89b4fa;
}

.lcb-root {
    display: flex;
    flex: 1;
    min-height: 0;
    height: 100%;
    overflow: hidden;
    background: var(--lcb-bg);
    color: var(--lcb-text);
    font-family: system-ui, monospace;
    font-size: 13px;
}

.lcb-column {
    width: 220px;
    min-width: 180px;
    flex-shrink: 0;
    border-right: 1px solid var(--lcb-border);
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--lcb-column-bg);
    position: relative;
}

.lcb-list {
    list-style: none;
    padding: 0.25rem 0;
    margin: 0;
}

.lcb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.75rem;
    cursor: pointer;
    user-select: none;
    border-radius: 4px;
    margin: 1px 4px;
    transition: background 80ms;
}

.lcb-item:hover { background: var(--lcb-item-hover); }
.lcb-item--selected { background: var(--lcb-selected); }
.lcb-item-icon { display: flex; align-items: center; flex-shrink: 0; }
.lcb-item-chevron { margin-left: auto; opacity: 0.5; display: flex; align-items: center; }
.lcb-error { padding: 1rem; color: #f38ba8; }

/* Keyboard focus ring — high-contrast, works on any background */
.lcb-item:focus-visible {
    outline: 2px solid var(--lcb-accent);
    outline-offset: -2px;
}

/* Remove default outline on the list itself when we provide focus on items */
.lcb-list:focus {
    outline: none;
}

.lcb-item-label {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Screen-reader-only utility */
.lcb-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

.lcb-resize-handle {
    position: absolute;
    top: 0;
    right: 0;
    width: 4px;
    height: 100%;
    cursor: col-resize;
    z-index: 10;
}
.lcb-resize-handle:hover { background: var(--lcb-accent); opacity: 0.4; }