/* === TREE VIEW === */
.tree-view {
    padding: 20px;
    overflow-y: auto;
    height: 100%;
    display: none;
}
.tree-root { margin-bottom: 12px; }
.tree-node { margin-left: 28px; }
.tree-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 8px;
    margin: 3px 0;
    transition: background 0.15s ease;
}
.tree-item:hover { background: var(--bg-card); }
.tree-item.selected { background: rgba(124,138,255,0.15); }
.tree-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1em;
    font-weight: bold;
    flex-shrink: 0;
}
.tree-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 5px;
    background: var(--bg);
    border: 2px solid var(--border);
    margin-right: 12px;
    display: none;
    flex-shrink: 0;
}
.tree-checkbox.visible { display: block; }
.tree-checkbox.checked { background: var(--accent); border-color: var(--accent); }
.tree-img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    margin-right: 12px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--bg-card);
}
.tree-name { font-size: 0.9em; }
.tree-children { display: none; }
.tree-children.open { display: block; }