/* 訂製品主／子分類選單（與 custom-product.html 設計頁一致） */
.cat-tablet {
    display: flex;
    gap: 0;
    margin-bottom: 1rem;
    align-items: stretch;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
}
.cat-tablet .cat-main-panel { flex: 1; min-width: 0; border-right: 1px solid #e5e7eb; }
.cat-tablet .cat-sub-panel { flex: 1; min-width: 0; }
.cat-tablet .cat-label {
    font-size: 0.75rem;
    color: #64748b;
    font-weight: 500;
    padding: 0.35rem 0.5rem;
    background: #f8fafc;
    display: block;
    border-bottom: 1px solid #e5e7eb;
}
.cat-tablet .cat-label-required { color: #334155; font-weight: 600; }
.cat-tablet .cat-sub-panel .cat-label { border-bottom: 1px solid #e5e7eb; }
.cat-tablet .cat-list {
    height: 7.5rem;
    overflow-y: auto;
    overflow-x: hidden;
    font-size: 0.875rem;
    background: #fff;
}
.cat-tablet .cat-option {
    padding: 0.4rem 0.5rem;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.cat-tablet .cat-option:hover { background: #f1f5f9; }
.cat-tablet .cat-option.selected { background: #e2e8f0; color: #0f172a; }
.cat-tablet .cat-sub-panel .cat-list.empty {
    background: #f8fafc;
    color: #94a3b8;
    padding: 0.5rem;
    display: flex;
    align-items: center;
}
.cat-tablet .cat-list::-webkit-scrollbar { width: 6px; }
.cat-tablet .cat-list::-webkit-scrollbar-track { background: #f1f5f9; }
.cat-tablet .cat-list::-webkit-scrollbar-thumb { background: #94a3b8; }
.cat-tablet .cat-list::-webkit-scrollbar-thumb:hover { background: #64748b; }
.cat-tablet .cat-list { scrollbar-width: auto; scrollbar-color: #94a3b8 #f1f5f9; }