/* ── Tree connector lines ─────────────────────────────────────────────────── */
ul.tree {
    margin: 0 auto;
    padding-top: 20px;
    padding-left: 2rem;
}

ul.tree li {
    list-style: none;
    position: relative;
    margin: 0.4rem 0;
    padding-left: 0.25rem;
}

ul.tree li:before,
ul.tree li:after {
    content: '';
    position: absolute;
    left: -22px;
    background-color: #b3d7ee;
}

ul.tree li:before {
    height: 2px;
    width: 14px;
    top: 14px;
}

ul.tree li:after {
    height: 28px;
    width: 2px;
    top: -14px;
}

ul.tree li.parent:after {
    height: 100%;
    top: 14px;
}

ul.tree li.parent:last-child:after { content: none; }
ul.tree li.super-parent:before,
ul.tree li.super-parent:after      { content: none; }

/* ── Details / summary ───────────────────────────────────────────────────── */
details { margin: 0 auto; }

summary {
    cursor: pointer;
    display: flex;
    align-items: center;
    position: relative;
    user-select: none;
    list-style: none;
    gap: 0.4rem;
}

summary::-webkit-details-marker { display: none; }

summary .tree-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #adb5bd;
    color: #fff;
    font-size: 0.7rem;
    flex-shrink: 0;
    transition: background 0.2s;
}

details[open] > summary .tree-toggle-icon { background: #f39c12; }

/* ── Tree nodes ──────────────────────────────────────────────────────────── */
.tree-node {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
    transition: filter 0.15s;
}
.tree-node:hover { filter: brightness(1.08); }

/* Client (root) — deep teal */
.tree-node-client {
    background: #0c425a;
    color: #fff;
    border: 2px solid #0a3750;
    font-weight: 700;
    font-size: .9rem;
}

/* Sector — medium teal */
.tree-node-sector {
    background: #165c80;
    color: #fff;
    border: 2px solid #0e4a66;
}

/* Company — orange (brand accent) */
.tree-node-company {
    background: #f39c12;
    color: #fff;
    border: 2px solid #c87a0a;
}

/* Department — success green */
.tree-node-department {
    background: #1a7f50;
    color: #fff;
    border: 2px solid #157347;
}

/* Sub-department — purple */
.tree-node-subdep {
    background: #5a3099;
    color: #fff;
    border: 2px solid #48267a;
}

.tree-node .node-hint {
    font-size: 0.65rem;
    opacity: 0.85;
    font-weight: 400;
}

/* ── Connecting guide lines ───────────────────────────────────────────────── */
details > ul {
    padding: 8px 0 8px 2.5rem;
    border-left: 2px dashed #b3d7ee;
    margin-left: 0.6rem;
}