.btn-open-menu {
    padding: 10px 15px;
    background: #007bff;
    color: white;
    border: none;
    font-size: 16px;
}

/* Overlay */
.overlay1 {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    z-index: 5000;
}

.menu-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 100%;
    height: 100%;
    background: #fff;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: #f1f1f1;
    font-weight: bold;
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.menu-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Tabs bên trái */
.tab-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 35%;
    background: #f9f9f9;
    border-right: 1px solid #ddd;
}

.tab-item {
    padding: 12px;
    cursor: pointer;

}

.tab-item.active {
    background: #fff;
    font-weight: bold;
    color: #007bff;
}

/* Nội dung tab */
.tab-content {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Danh sách danh mục con */
.category-grid {
    flex-wrap: wrap;
    gap: 10px;
    padding: 0;
    margin: 0 0 10px 0;
    list-style: none;
}

.category-grid li {
    line-height: 2;
    font-size: 16px;
}

.category-grid img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    margin-bottom: 5px;
    border-radius: 8px;
}