.mb-layout {
      display: grid;
      grid-template-columns: 260px 1fr;
      gap: 0;
      min-height: 72vh;
    }

    .mb-sidebar {
      display: flex;
      flex-direction: column;
      border-right: 1px solid var(--border);
      background: rgba(10, 20, 40, 0.5);
      border-radius: 1.1rem 0 0 1.1rem;
      overflow: hidden;
    }

    .mb-sidebar-head {
      padding: .7rem .8rem .5rem;
      border-bottom: 1px solid var(--border);
      flex-shrink: 0;
    }

    .mb-search-wrap {
      position: relative;
    }

    #mb-search {
      width: 100%;
      background: rgba(3, 11, 18, 0.8);
      border: 1px solid var(--border);
      border-radius: .5rem;
      color: var(--text-strong);
      font-size: .82rem;
      padding: .35rem .65rem;
      outline: none;
      box-sizing: border-box;
    }

    #mb-search:focus { border-color: var(--accent); }

    #mb-search-results {
      display: none;
      position: absolute;
      top: 100%;
      left: 0; right: 0;
      z-index: 50;
      background: rgba(9,20,36,.97);
      border: 1px solid var(--border);
      border-radius: 0 0 .6rem .6rem;
      max-height: 280px;
      overflow-y: auto;
    }

    #mb-tree {
      flex: 1;
      overflow-y: auto;
      padding: .4rem 0;
    }

    .mb-tree-row {
      font-size: .83rem;
      padding: .28rem .5rem;
      cursor: pointer;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      transition: background .12s;
      color: var(--text-muted);
    }

    .mb-tree-row:hover { background: rgba(56,189,248,.12); color: var(--text-strong); }

    .mb-group { color: var(--text-strong); font-weight: 500; }
    .mb-group .mb-arrow { color: var(--accent); font-size: .7rem; }

    .mb-type { color: rgba(226,232,240,.75); }
    .mb-type:hover { color: var(--text-strong); }
    .mb-active { color: var(--accent) !important; font-weight: 700; }

    .mb-content {
      display: flex;
      flex-direction: column;
      padding: 1rem;
      gap: 1rem;
      overflow: hidden;
    }

    @media (max-width: 760px) {
      .mb-layout { grid-template-columns: 1fr; }
      .mb-sidebar { border-right: none; border-bottom: 1px solid var(--border); border-radius: 1.1rem 1.1rem 0 0; max-height: 40vh; }
    }

    /* ── Type detail page ───────────────────────────────────────────── */

    .mt-order-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }

    @media (max-width: 900px) {
      .mt-order-grid { grid-template-columns: 1fr; }
    }

    .tw-scroll { max-height: 420px; overflow-y: auto; }