/* ---------------------------------------------------------------------------
   Nested-set tree widget. Themed with the site's CSS variables so it tracks
   light/dark automatically. Hydrated by tree-widget.js from ```ns-tree blocks.
   --------------------------------------------------------------------------- */

.ns-widget {
    --ns-line: var(--border);
    --ns-descendant: var(--accent-bg);

    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 0;
    margin: 1.5rem 0;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg);
    font-size: 0.9rem;
}

.ns-tree {
    padding: 0.9rem 1rem;
    overflow-x: auto;
}

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

.ns-tree .ns-children {
    margin-left: 0.75rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--ns-line);
}

.ns-tree .ns-root {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
}

.ns-item { position: relative; }

.ns-node {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.28rem 0.5rem;
    margin: 0.1rem 0;
    color: var(--fg);
    font: inherit;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
}

.ns-node:hover { background: var(--bg-elevated); }
.ns-node:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.ns-node-name { font-weight: 500; }

.ns-chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--fg-muted);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.02rem 0.45rem;
    white-space: nowrap;
}

.ns-own {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-bg);
}

.ns-trailing {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding-left: 0.5rem;
}

.ns-rollup {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1;
    color: var(--accent);
    background: var(--accent-bg);
    border: 1px solid var(--accent);
    border-radius: 999px;
    padding: 0.18rem 0.5rem;
    white-space: nowrap;
}

.ns-bounds {
    display: inline-flex;
    gap: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    line-height: 1;
}

.ns-lft, .ns-rgt {
    display: inline-block;
    min-width: 1.4em;
    text-align: center;
    padding: 0.18rem 0.3rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    color: var(--fg-muted);
    background: var(--bg);
}

/* selection / relationship states ------------------------------------------ */

.ns-item.is-selected > .ns-node {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.ns-item.is-selected > .ns-node .ns-lft,
.ns-item.is-selected > .ns-node .ns-rgt {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.35);
    color: #fff;
}
.ns-item.is-selected > .ns-node .ns-chip,
.ns-item.is-selected > .ns-node .ns-rollup {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.35);
    color: #fff;
}

.ns-item.is-descendant > .ns-node,
.ns-item.is-preview > .ns-node {
    background: var(--ns-descendant);
    border-color: var(--accent);
}

.ns-item.is-ancestor > .ns-node {
    border-color: var(--accent);
    border-style: dashed;
}

/* aside --------------------------------------------------------------------- */

.ns-aside {
    border-left: 1px solid var(--border);
    background: var(--bg-elevated);
    padding: 0.9rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-width: 0;
}

.ns-hint {
    color: var(--fg-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

.ns-sql-title {
    font-weight: 600;
    margin-bottom: 0.45rem;
}

.ns-sql-code {
    margin: 0 0 0.5rem;
    padding: 0.6rem 0.7rem;
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.45;
    overflow-x: auto;
    white-space: pre;
}

.ns-sql-note {
    font-size: 0.8rem;
    color: var(--fg-muted);
    line-height: 1.5;
}
.ns-sql-note code {
    font-size: 0.92em;
    padding: 0.05em 0.3em;
}

.ns-legend {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.75rem;
    font-size: 0.72rem;
    color: var(--fg-muted);
}
.ns-key { display: inline-flex; align-items: center; gap: 0.35rem; }
.ns-key::before {
    content: "";
    width: 0.85rem;
    height: 0.85rem;
    border-radius: 3px;
    border: 1px solid var(--accent);
    display: inline-block;
}
.ns-key-selected::before { background: var(--accent); }
.ns-key-descendant::before { background: var(--ns-descendant); }
.ns-key-ancestor::before { background: transparent; border-style: dashed; }

@media (max-width: 720px) {
    .ns-widget { grid-template-columns: 1fr; }
    .ns-aside {
        border-left: 0;
        border-top: 1px solid var(--border);
    }
}