::selection{background:var(--blue-soft)}
  ::-webkit-scrollbar{width:8px;height:8px}
  ::-webkit-scrollbar-thumb{background:#cbd3e3;border-radius:20px}
  ::-webkit-scrollbar-thumb:hover{background:#aeb8cf}
  .nav-scroll::-webkit-scrollbar-thumb{background:#2a3355}

  .app{display:grid;grid-template-columns:236px 1fr;min-height:100vh}

  /* ===== SIDEBAR ===== */
  .sidebar{background:linear-gradient(180deg,var(--nav),var(--nav-2));color:var(--nav-txt);
    position:sticky;top:0;height:100vh;display:flex;flex-direction:column;z-index:40}
  .logo{display:flex;align-items:center;gap:11px;padding:20px 20px 18px}
  .logo-mark{width:38px;height:38px;flex-shrink:0;position:relative}
  .logo h1{font-size:19px;font-weight:800;color:#fff;letter-spacing:-.4px;line-height:1}
  .logo h1 span{color:#3ddc84}
  .logo small{font-size:9.5px;color:var(--nav-txt-dim);letter-spacing:.6px;font-weight:600}
  .bpo-brand{display:flex;align-items:center;gap:10px;margin:0 12px 8px;padding:10px 11px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);border-radius:12px}
  .bpo-brand .bpo-ava{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,#3b6ef5,#22c55e);display:grid;place-items:center;color:#fff;font-weight:800;font-size:12px;flex-shrink:0}
  .bpo-brand b{display:block;font-size:12.5px;font-weight:800;color:#fff;line-height:1.2}
  .bpo-brand small{font-size:9px;color:#7fa596;font-weight:700;letter-spacing:1px}
  .nav-scroll{flex:1;overflow-y:auto;padding:4px 12px 12px}
  .nav-cap{font-size:10px;letter-spacing:1.2px;font-weight:700;color:var(--nav-txt-dim);padding:16px 12px 8px}
  .nav-cap-toggle{display:flex;align-items:center;justify-content:space-between;cursor:pointer;user-select:none;
    border-radius:8px;margin:4px 0 0;transition:background .15s,color .15s}
  .nav-cap-toggle:hover{color:var(--nav-txt);background:rgba(255,255,255,.04)}
  .cap-chev{width:13px;height:13px;opacity:.55;transition:transform .22s;flex-shrink:0}
  .nav-cap.open .cap-chev{transform:rotate(180deg)}
  .nav-grp{overflow:hidden;max-height:0;transition:max-height .28s ease}
  .nav-grp.open{max-height:1200px}
  /* ===== sidebar user card ===== */
  .side-user{flex-shrink:0;display:flex;align-items:center;gap:11px;margin:8px 12px 14px;padding:10px 11px;
    background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);border-radius:13px}
  .su-ava{width:36px;height:36px;flex-shrink:0;border-radius:10px;display:grid;place-items:center;
    background:linear-gradient(135deg,#3b6ef5,#22c55e);color:#fff;font-weight:800;font-size:12.5px}
  .su-meta{flex:1;min-width:0}
  .su-meta b{display:block;font-size:12.5px;font-weight:800;color:#fff;line-height:1.25;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .su-meta small{font-size:10px;color:var(--nav-txt);font-weight:600}
  .su-out{flex-shrink:0;width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
    color:var(--nav-txt);background:rgba(255,255,255,.05);transition:.16s}
  .su-out svg{width:17px;height:17px}
  .su-out:hover{background:rgba(239,68,68,.9);color:#fff}
  .nav-i{display:flex;align-items:center;gap:12px;padding:9.5px 12px;border-radius:10px;font-size:13px;
    font-weight:600;color:var(--nav-txt);margin-bottom:2px;transition:.18s;position:relative}
  .nav-i svg{width:18px;height:18px;flex-shrink:0;opacity:.9}
  .nav-i .chev{margin-left:auto;width:14px;height:14px;opacity:.5}
  .nav-i:hover{background:rgba(255,255,255,.05);color:#e6ebfa}
  .nav-i.active{background:var(--blue);color:#fff;box-shadow:0 8px 18px -8px rgba(59,110,245,.8)}
  .nav-i.active svg{opacity:1}
  .nav-i .tag-new{margin-left:auto;background:var(--green);color:#04240f;font-size:9px;font-weight:800;padding:2px 7px;border-radius:20px}