/* === HOWIEWE'S PRODUCT CATALOG REDESIGN (REFACTORED RESPONSIVE VERSION) === */
/* Designed by your AI Product Designer */

/* --- 1. 全域與變數設定 (Global & Variables) --- */
:root {
    /* 色彩 Palette (Light Mode) */
    --bg-color: #f9fafb;
    --surface-color: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --input-bg: #ffffff;
    --primary-color: #3b82f6;
    --primary-color-hover: #2563eb;
    --secondary-color: #6b7280;
    --secondary-color-hover: #4b5563;
    --danger-color: #ef4444;
    --danger-color-hover: #dc2626;
    --success-color: #22c55e;
    --success-color-hover: #16a34a;

    /* 陰影 & 圓角 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;

    /* 字體 */
    --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body.dark-mode {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-primary: #e9ecef;
    --text-secondary: #9ca3af;
    --border-color: #495057;
    --input-bg: #2a2a2a;
}

/* --- 2. 基本樣式與布局 (Base & Layout) --- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

body.modal-open main,
body.lightbox-open {
    overflow: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

h1,
h2,
h3 {
    color: var(--text-primary);
    font-weight: 700;
}

.hidden {
    display: none !important;
}

.empty-message {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    padding: 4rem 0;
}

/* --- 3. Header & 主布局 (Header & Main Layout) --- */
header {
    flex-shrink: 0;
    background-color: var(--surface-color);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    height: 60px;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

header h1 a {
    text-decoration: none;
    color: inherit;
}

.main-wrapper {
    display: flex;
    flex-grow: 1;
    overflow: hidden;
}

main {
    flex-grow: 1;
    overflow-y: auto;
    padding-bottom: 4rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- 4. 側邊欄 & 按鈕 (Sidebar & Buttons) --- */
#category-sidebar {
    width: 260px;
    flex-shrink: 0;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    transition: transform 0.3s ease-in-out;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
}

.sidebar-actions {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.sidebar-actions .btn {
    width: 100%;
}

.menu-toggle-btn,
#theme-toggle {
    display: flex;
    /* 使用 flex 讓 SVG 居中 */
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    /* 移除內邊距，由寬高決定大小 */
    width: 44px;
    /* 固定寬高 */
    height: 44px;
    border-radius: 50%;
    /* 圓形按鈕 */
    transition: background-color 0.2s, color 0.2s;
}

.menu-toggle-btn:hover,
#theme-toggle:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

/* 核心：SVG 圖示切換邏輯 (全域生效) */
/* 預設 (淺色模式) 時，隱藏月亮 */
body:not(.dark-mode) #theme-toggle .icon-moon {
    display: none;
}

/* 在深色模式時，隱藏太陽 */
body.dark-mode #theme-toggle .icon-sun {
    display: none;
}

#page-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1001;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

body.sidebar-open #page-overlay {
    opacity: 1;
    pointer-events: auto;
}

.icon-moon {
    display: none;
}

.icon-sun {
    display: block;
}

body.dark-mode .icon-moon {
    display: block;
}

body.dark-mode .icon-sun {
    display: none;
}

/* --- 5. 分類樹 (Category Tree) --- */
#category-tree,
#category-tree ul {
    list-style: none;
    padding: 0;
}

#category-tree ul {
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
    margin-left: 0.5rem;
    transition: max-height 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    overflow: hidden;
}

#category-tree ul.hidden {
    max-height: 0;
}

#category-tree li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--border-radius-md);
    transition: background-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

#category-tree li.has-children>a {
    cursor: pointer;
}

#category-tree li a:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

#category-tree li a.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
}

.category-toggle-icon {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.category-toggle-icon.expanded {
    transform: rotate(90deg);
}

/* --- 6. 主內容區 (Main Content) --- */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: center;
    transition: all 0.3s ease;
}

#search-box {
    flex-grow: 1;
    min-width: 200px;
    font-family: inherit;
    font-size: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    transition: border-color .2s, box-shadow .2s;
}

#search-box:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card .image-container {
    width: 100%;
    padding-top: 100%;
    position: relative;
    background-color: var(--bg-color);
}

.product-card .product-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 1rem;
}

.product-card .product-info {
    padding: 1.25rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.product-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-card .price {
    color: var(--primary-color);
    font-size: 1.25rem;
    font-weight: bold;
    margin: 0;
}

.product-card .price.price-empty {
    visibility: hidden;
}

a.product-card,
a.product-card:hover {
    text-decoration: none;
    /* 移除底線 */
    color: inherit;
    /* 讓文字顏色繼承父層 (body)，避免顯示預設的藍色 */
}

/* --- 7. Toolbar & 排序 (Toolbar & Sorting) --- */
.sort-container {
    position: relative;
}

.sort-options {
    position: absolute;
    top: calc(100% + 5px);
    right: 0;
    background-color: var(--surface-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    z-index: 100;
    overflow: hidden;
    width: max-content;
}

.sort-options a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
}

.sort-options a:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

#order-toggle-btn .icon-desc {
    display: none;
}

#order-toggle-btn[data-order="desc"] .icon-asc {
    display: none;
}

#order-toggle-btn[data-order="desc"] .icon-desc {
    display: block;
}

/* --- 8. 分頁 (Pagination) --- */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2.5rem;
}

.pagination-container .btn,
.pagination-container .page-info {
    padding: 0.5rem 1rem;
    min-width: 44px;
    height: 44px;
}

.pagination-container .page-info {
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* --- 9. Modal & 表單 (Modal & Form) --- */
.modal-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5vh 2vw;
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-in-out;
}

.modal-container:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    overscroll-behavior: contain;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
}

.modal-container:not(.hidden) .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
    z-index: 10;
}

.close-btn:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-header {
    flex-shrink: 0;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
}

.modal-header .close-btn {
    position: static;
    transform: none;
}

#product-form {
    flex-grow: 1;
    display: flex;
    overflow: hidden;
}

.modal-body {
    flex-grow: 1;
    display: flex;
    gap: 1.5rem;
    overflow: hidden;
    padding: 1.5rem;
}

.modal-footer {
    flex-shrink: 0;
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.modal-footer .button-group {
    margin: 0;
    justify-content: flex-end;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

form input,
form textarea,
form select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}

form input:focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent);
}

.barcode-preview-container {
    background-color: #fff;
    padding: 10px;
    margin-top: 10px;
    border-radius: var(--border-radius-sm);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.barcode-preview-container svg {
    width: 100%;
    max-width: 200px;
    height: auto;
    display: none;
}

/* --- 10. 按鈕 & 通用元件 (Buttons & Components) --- */
.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: background-color 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    flex-shrink: 0;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-color-hover);
}

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-color-hover);
}

.btn-success {
    background-color: var(--success-color);
    color: #fff;
}

.btn-success:hover:not(:disabled) {
    background-color: var(--success-color-hover);
}

#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1020;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--border-radius-md);
    color: #fff;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.21, 1.02, 0.73, 1);
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background-color: #16a34a;
}

.toast.error {
    background-color: #dc2626;
}

.toast.info {
    background-color: #2563eb;
}

.view-toggle {
    display: none;
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-secondary);
}

.view-toggle svg {
    width: 20px;
    height: 20px;
}

.view-toggle .icon-list {
    display: none;
}

.view-toggle.list-view-active .icon-grid {
    display: none;
}

.view-toggle.list-view-active .icon-list {
    display: block;
}

/* --- 11. 圖片相關 (Image Galleries & Lightbox) --- */
#product-detail-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 2rem;
}

.main-image-wrapper {
    width: 100%;
    position: relative;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.image-gallery-customer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    /* 這會為主圖和縮圖列表之間創造垂直間距 */
}

#detail-thumbnail-list {
    /* 確保在所有情況下，縮圖之間都有間距並能自動換行 */
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.image-gallery-admin .main-image-wrapper {
    height: 0;
    padding-top: 100%;
}

.main-image-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0.5rem;
    box-sizing: border-box;
    object-fit: contain;
    transition: transform 0.2s ease;
}

.thumbnail-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.thumbnail-item {
    position: relative;
    width: 80px;
    height: 80px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    cursor: grab;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.thumbnail-item:hover {
    border-color: var(--primary-color);
}

.thumbnail-item.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 40%, transparent);
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.delete-thumb-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    background-color: rgba(239, 68, 68, 0.8);
    backdrop-filter: blur(2px);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 14px;
    line-height: 22px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    transform: scale(0.8);
}

.thumbnail-item:hover .delete-thumb-btn {
    opacity: 1;
    transform: scale(1);
}

/* Image Upload Flow */
#image-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

#image-dropzone:hover,
#image-dropzone.dragover {
    background-color: color-mix(in srgb, var(--primary-color) 5%, transparent);
    border-color: var(--primary-color);
}

#image-dropzone p {
    margin: 0.5rem 0;
    font-weight: 500;
}

#image-dropzone span {
    font-size: 0.875rem;
}

.thumbnail-item.add-new {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    border-style: dashed;
}

.thumbnail-item.add-new:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: color-mix(in srgb, var(--primary-color) 5%, transparent);
}

/* Cropper Modal */
#cropper-modal .cropper-content {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    text-align: center;
}

#cropper-modal h3 {
    margin-top: 0;
}

#cropper-modal p {
    color: var(--text-secondary);
    margin-top: -0.5rem;
    margin-bottom: 1rem;
}

#cropper-modal .cropper-container {
    width: 100%;
    height: 40vh;
    max-height: 400px;
    background-color: var(--bg-color);
    margin-bottom: 1rem;
}

#cropper-modal .cropper-container img {
    max-height: 100%;
}

.cropper-view-box,
.cropper-face {
    border-radius: 4px;
    outline-color: color-mix(in srgb, var(--primary-color) 75%, transparent);
}

#cropper-modal .button-group.cropper-actions {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 0.75rem;
    width: 100%;
}

/* Image Viewer Lightbox */
.image-viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    z-index: 1020;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
    overscroll-behavior: contain;
    touch-action: none;
}

body.lightbox-open {
    overflow: hidden;
}

.image-viewer:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.image-viewer img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    cursor: grab;
    transition: transform 0.1s linear;
    transform-origin: center center;
    user-select: none;
    touch-action: pan-x pan-y;
}

.image-viewer img.panning {
    cursor: grabbing;
}

/* --- 12. 顧客端詳情頁 (Customer Details Page) --- */
#product-detail-info .price {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.product-description-display {
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--text-secondary);
}

#product-detail-info .details-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.5rem;
    align-items: center;
    color: var(--text-secondary);
}

#product-detail-info .details-grid>dt {
    font-weight: 700;
}

#product-detail-info .barcode-display {
    background: #fff;
    padding: 10px;
    border-radius: var(--border-radius-sm);
    max-width: 250px;
    margin-top: 1rem;
}

#product-detail-info .barcode-display svg {
    width: 100%;
    height: auto;
    display: block;
}

.slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    background-color: var(--bg-color);
    height: 0;
    padding-top: 100%;
}

.slider-wrapper {
    display: flex;
    transition: transform 0.4s ease-in-out;
    cursor: grab;
    user-select: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slide {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
}

.slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.slider-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.4);
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.2s ease, background-color 0.2s;
}

.slider-container:hover .slider-nav-btn {
    opacity: 1;
}

.slider-nav-btn.prev {
    left: 10px;
}

.slider-nav-btn.next {
    right: 10px;
}

.slider-nav-btn:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

.slider-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.dot.active {
    background-color: white;
}

/* --- 13. Admin 專屬頁面與元件 (Admin-Specific Pages & Components) --- */
/* Batch Upload Page */
.batch-page .batch-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.5rem;
    height: calc(100vh - 60px);
    overflow: hidden;
}

.batch-page .batch-panel {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.batch-page .batch-panel h2 {
    margin-top: 0;
}

.batch-page #image-dropzone {
    border: 2px dashed var(--border-color);
}

.batch-page #image-dropzone:hover,
.batch-page #image-dropzone.dragover {
    background-color: color-mix(in srgb, var(--primary-color) 5%, transparent);
    border-color: var(--primary-color);
}

#image-pool {
    flex-grow: 1;
    overflow-y: auto;
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
    padding: 0.5rem;
}

.img-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 100%;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 3px solid transparent;
    transition: border-color 0.2s, opacity 0.3s, transform 0.2s;
}

.img-thumbnail:hover {
    transform: scale(1.05);
}

.img-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-thumbnail.selected {
    border-color: var(--primary-color);
}

.img-thumbnail.assigned {
    opacity: 0.3;
    cursor: not-allowed;
    filter: grayscale(80%);
}

#data-list {
    flex-grow: 1;
    overflow-y: auto;
    margin-top: 1rem;
}

.data-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.data-item:hover {
    background-color: var(--bg-color);
}

.data-item.assigned {
    background-color: color-mix(in srgb, var(--success-color) 10%, transparent);
}

.data-item-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
}

.data-item-status {
    font-size: 1.5rem;
    line-height: 1;
}

.data-item-status.assigned {
    color: var(--success-color);
}

.data-item-images {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.data-item-images img {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    object-fit: cover;
}

#final-submit-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem 1.5rem;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    text-align: right;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

/* Category Management Modal (重構後) */
.modal-container.category-manager .modal-content {
    width: 95%;
    max-width: 720px;
    height: 85vh;
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.category-manager-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    gap: 1rem;
}

.category-manager-header h2 {
    margin: 0 auto 0 0;
    font-size: 1.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.category-manager-header .btn {
    padding: 0.5rem 1rem;
}

#category-back-btn svg {
    margin-right: 0.25rem;
}

.category-manager-header .close-btn {
    position: static;
    transform: none;
    font-size: 1.8rem;
    order: 10;
}

/* --- ▼▼▼ 【新增】視圖切換的核心樣式 ▼▼▼ --- */
.category-views-container {
    flex-grow: 1;
    position: relative;
    /* 讓子視圖可以絕對定位 */
    overflow: hidden;
}

#category-manager-view,
#category-edit-view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow-y: auto;
    background-color: var(--surface-color);
    transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
    overscroll-behavior: contain;
    /* 防止滾動穿透 */
}

/* 預設的進入/離開動畫 */
#category-edit-view {
    opacity: 0;
    transform: translateX(20px);
    pointer-events: none;
    /* 隱藏時不可點擊 */
}

#category-edit-view:not(.hidden) {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

#category-manager-view.hidden {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

/* --- ▲▲▲ 新增結束 ▲▲▲ --- */

.category-manager-list {
    padding: 1rem;
}

/* 以下是列表項目的樣式，保持不變 */
.cm-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-radius: var(--border-radius-md);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.2s, box-shadow 0.2s;
}

.cm-item:hover {
    background-color: var(--bg-color);
}

.cm-drag-handle {
    cursor: grab;
    color: var(--text-secondary);
    margin-right: 1rem;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.cm-item:hover .cm-drag-handle {
    opacity: 1;
}

.cm-name {
    flex-grow: 1;
    font-weight: 500;
    cursor: pointer;
}

.cm-actions {
    display: flex;
    gap: 0.5rem;
}

.cm-actions .action-btn {
    opacity: 0.5;
    transition: opacity 0.2s;
}

.cm-item:hover .cm-actions .action-btn {
    opacity: 1;
}

.cm-item.sortable-ghost {
    background-color: color-mix(in srgb, var(--primary-color) 20%, transparent);
    border-style: dashed;
}

.cm-item.sortable-chosen {
    cursor: grabbing;
    box-shadow: var(--shadow-lg);
}

/* 編輯表單的內距，由 inline style 改為 class 控制 */
#category-edit-view .modal-body {
    padding: 1.5rem;
}

#category-edit-view .modal-footer {
    padding: 0 1.5rem 1.5rem 1.5rem;
    margin-top: 0;
}

/* Admin Edit Modal Specific Layouts */
.modal-column-left {
    flex: 0 0 40%;
    display: flex;
    flex-direction: column;
    min-width: 400px;
}

.modal-column-right {
    flex: 1 1 60%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.right-column-content-wrapper {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 10px;
}

.form-group.full-height {
    display: flex;
    flex-direction: column;
    height: 100%;
}

#image-upload-area {
    flex-grow: 1;
    display: flex;
    height: 100%;
    min-height: 200px;
}

.image-gallery-admin {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
}

#edit-modal-container .modal-header h2,
#edit-modal-container .modal-column-left>.form-group>label {
    display: none;
}

#edit-modal-container .modal-header {
    padding: 0;
    border-bottom: none;
    height: 0;
}

#edit-modal-container .modal-content {
    position: relative;
}

#edit-modal-container .close-btn {
    position: absolute;
    z-index: 10;
}

/* 1. 針對手機版「編輯產品」彈窗的主滾動區 */
#edit-modal-container .modal-body {
    overscroll-behavior: contain;
}

/* 2. 針對「分類管理」彈窗的滾動列表 */
.category-manager-list {
    overscroll-behavior: contain;
}


/* --- 手機版 (<= 768px) --- */
@media (max-width: 768px) {

    /* --- 新增：從 991px 規則合併過來的 Admin Edit Modal 手機版佈局 --- */
    #edit-modal-container .modal-content {
        width: 95vw;
        height: 90vh;
        overflow: hidden;
    }

    #edit-modal-container .modal-body {
        flex-direction: column;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding: 1rem;
        padding-top: 3.5rem;
        /* 稍微增加頂部空間給關閉按鈕 */
    }

    #edit-modal-container .modal-column-left,
    #edit-modal-container .modal-column-right {
        flex: none;
        min-width: 0;
        width: 100%;
    }

    #edit-modal-container .right-column-content-wrapper {
        overflow-y: visible;
        height: auto;
    }

    #edit-modal-container .close-btn {
        top: 0.75rem;
        right: 0.75rem;
    }

    /* ▼▼▼【核心修改】讓縮圖列表顯示出來，並設定為可水平滾動 ▼▼▼ */
    #edit-modal-container #thumbnail-list-admin {
        display: flex;
        /* 從 none 改為 flex */
        overflow-x: auto;
        /* 允許水平滾動 */
        overflow-y: hidden;
        /* 隱藏垂直滾動條 */
        padding: 0.5rem 0;
        /* 增加一點垂直內距 */
        /* 讓滾動在 iOS 上更平滑 */
        -webkit-overflow-scrolling: touch;
        /* 為了美觀，可以嘗試隱藏滾動條 */
        scrollbar-width: none;
        /* Firefox */
    }

    #edit-modal-container #thumbnail-list-admin::-webkit-scrollbar {
        display: none;
        /* Chrome, Safari */
    }

    /* ▲▲▲ 修改結束 ▲▲▲ */


    #edit-modal-container .main-image-wrapper {
        border: none;
        background-color: var(--bg-color);
        border-radius: var(--border-radius-md);
        padding: 1rem;
        /* 為了佈局穩定，給一個固定的高度 */
        height: 250px;
    }

    #edit-modal-container .image-gallery-admin {
        gap: 0.5rem;
        /* 增加主圖和縮圖列表之間的間距 */
    }

    /* --- 合併規則結束 --- */


    /* General Layout */
    .container {
        padding: 1.5rem 1rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    .menu-toggle-btn {
        display: flex;
    }

    #category-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 1002;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
        border-right: none;
    }

    body.sidebar-open #category-sidebar {
        transform: translateX(0);
    }

    /* General Modals */
    .modal-content {
        padding: 1.5rem;
        height: auto;
        max-height: 85vh;
        margin-top: 2rem;
        margin-bottom: 2rem;
        transform: scale(1) !important;
    }

    #cropper-modal .button-group.cropper-actions {
        grid-template-columns: 1fr;
    }

    /* Product Grid & View Toggle */
    .product-grid {
        grid-template-columns: 1fr;
    }

    .header-actions .view-toggle {
        display: flex;
    }

    .product-grid.view-two-columns {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .product-grid.view-two-columns .product-card:has(.price.price-empty) h3 {
        white-space: initial;
        overflow: hidden;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    .product-grid.view-two-columns .product-card:has(.price.price-empty) .price {
        display: none;
    }

    .slider-nav-btn {
        display: none !important;
    }

    /* Customer Page: Toolbar */
    .customer-page .toolbar {
        display: grid;
        grid-template-columns: 44px 1fr 1fr 44px;
        gap: 0.5rem;
        align-items: center;
    }

    .customer-page #search-box {
        display: none;
    }

    .customer-page #search-toggle-btn,
    .customer-page #category-toggle-btn,
    .customer-page #sort-btn,
    .customer-page #order-toggle-btn {
        display: inline-flex;
        width: 100%;
        height: 44px;
        padding: 0;
        justify-content: center;
    }

    .customer-page #category-toggle-btn,
    .customer-page #sort-btn {
        padding: 0 0.75rem;
    }

    .customer-page .toolbar.search-active {
        grid-template-columns: 1fr 44px 44px;
    }

    .customer-page .toolbar.search-active #search-box {
        display: block;
        width: 100%;
        height: 44px;
    }

    .customer-page .toolbar.search-active #search-toggle-btn,
    .customer-page .toolbar.search-active #category-toggle-btn {
        display: none;
    }

    .customer-page .toolbar.search-active .sort-container {
        width: auto;
    }

    .customer-page .toolbar.search-active #sort-btn {
        width: 44px;
        padding: 0;
    }

    .customer-page .toolbar.search-active #sort-btn span {
        display: none;
    }

    /* Admin Page: Toolbar */
    .admin-page .toolbar {
        display: grid;
        grid-template-columns: 1fr auto;
        row-gap: 1rem;
    }

    .admin-page .toolbar-actions {
        grid-column: 1 / -1;
        order: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
        width: 100%;
    }

    .admin-page #search-box {
        grid-column: 1 / -1;
        order: 1;
        display: block;
    }

    .admin-page #search-toggle-btn {
        display: none !important;
    }

    .admin-page .sort-container {
        order: 3;
    }

    .admin-page #order-toggle-btn {
        order: 4;
    }

    /* Category Manager Modal: Mobile */
    .modal-container.category-manager .modal-content {
        width: 90%;
        height: auto;
        max-height: 85vh;
        border-radius: var(--border-radius-lg);
        transform: scale(1) !important;
        margin-top: 2rem;
        margin-bottom: 2rem;
    }

    .category-manager-header {
        padding: 0.75rem 1rem;
    }

    .category-manager-header h2 {
        font-size: 1.1rem;
    }

    .cm-actions .action-btn {
        opacity: 1;
    }

    /* Customer Detail Modal Fix: Mobile */
    #detail-modal-container .modal-content {
        height: auto;
        max-height: 85vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        width: 95%;
    }
}

/* --- 平板與桌面 (>= 768px) --- */
@media (min-width: 768px) {

    /* Layouts */
    #product-detail-layout {
        grid-template-columns: 350px 1fr;
        align-items: flex-start;
    }

    .image-gallery-customer {
        max-width: 350px;
    }

    .batch-page .batch-workspace {
        flex-direction: row;
    }

    .batch-page #image-panel {
        width: 40%;
    }

    .batch-page #data-panel {
        width: 60%;
    }

    /* Toolbar: General Base Styles */
    .toolbar {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        width: 100%;
        /* 【核心修正】強制工具列本身撐滿整個容器寬度 */
    }

    #search-toggle-btn,
    #category-toggle-btn {
        display: none;
    }

    #search-box {
        display: block;
    }

    .sort-container {
        flex-shrink: 0;
    }

    /* Toolbar: Customer Page Specific Layout */
    .customer-page .toolbar #search-box {
        /* 這條規則現在可以正常運作，因為父容器有剩餘空間了 */
        flex-grow: 1;
    }

    /* Toolbar: Admin Page Specific Layout (Grid) - 保持不變 */
    .admin-page .toolbar {
        display: grid;
        grid-template-columns: minmax(200px, 1fr) auto auto auto;
        width: auto;
        /* 管理頁面使用 Grid，不需要 100% 寬度 */
    }

    .admin-page .toolbar .toolbar-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
        width: 100%;
    }

    .admin-page #search-box {
        max-width: none;
    }



    /* Admin Home Button */
    #home-btn-mobile {
        display: none;
    }

    #home-btn-desktop {
        display: inline-flex;
    }



    /* Customer Detail Modal Fix: Desktop */
    #detail-modal-container .modal-content {
        height: auto;
        max-height: 85vh;
        overflow-y: auto;
        width: 90%;
        max-width: 900px;
    }
}

/* --- 大型桌面 (>= 992px) --- */
@media (min-width: 992px) {

    /* Admin Edit Modal: Desktop Layout */
    #edit-modal-container.modal-container {
        padding-top: 3vh;
        padding-bottom: 3vh;
    }

    #edit-modal-container .modal-content {
        max-width: 1200px;
        width: 90%;
        height: auto;
        /* Let content decide height */
        max-height: 94vh;
        /* Adjust based on new padding */
        display: flex;
        flex-direction: column;
    }

    #edit-modal-container .modal-body {
        padding: 1.5rem 1.5rem 1rem 1.5rem;
    }

    #edit-modal-container .modal-footer {
        padding-top: 1rem;
        margin-top: 0;
    }

    #edit-modal-container .close-btn {
        top: 1rem;
        right: 1.5rem;
    }

    /* Admin Edit Modal: Image Gallery Layout */
    .image-gallery-admin {
        display: flex;
        flex-direction: column;
        height: 100%;
        gap: 0.75rem;
    }

    #edit-modal-container .main-image-wrapper {
        flex: 2;
        min-height: 0;
        border: none;
        background-color: var(--bg-color);
        border-radius: var(--border-radius-md);
        padding: 1rem;
        /* Remove fixed padding-top for flex to work */
        height: auto;
        padding-top: 0;
    }

    #edit-modal-container #thumbnail-list-admin {
        flex: 1;
        min-height: 0;
        border: none;
        border-radius: var(--border-radius-md);
        padding: 0.5rem;
        overflow-y: auto;
    }
}

/* === 14. 目錄產生器專屬樣式 (Print Catalog Generator) === */

/* --- 頁面主佈局 --- */
.print-tool-page {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.print-layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.print-settings {
    width: 350px;
    flex-shrink: 0;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.print-settings-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.print-settings-header h2 {
    margin: 0;
    font-size: 1.25rem;
}

.print-settings-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex-grow: 1;
}

.print-settings-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* --- 分類樹 (含複選框) --- */
#category-tree-wrapper ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#category-tree-wrapper li {
    margin-top: 0.5rem;
}

#category-tree-wrapper label {
    margin-left: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

/* --- 預覽區 --- */
.print-preview {
    flex-grow: 1;
    background-color: var(--bg-color);
    padding: 2rem;
    overflow-y: auto;
}

#preview-container {
    width: 100%;
}

.preview-placeholder {
    text-align: center;
    padding: 4rem;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    color: var(--text-secondary);
}

.preview-placeholder p.error {
    color: var(--danger-color);
}

/* --- A4 頁面模擬 --- */
.page {
    background: #fff;
    width: 816px;
    /* A4 寬度 @ 96dpi */
    height: 1100px;
    /* 約 A4 高度，預留一些空間 */
    margin: 0 auto 1.5rem auto;
    box-shadow: var(--shadow-lg);
    padding-top: 20px;
    /* 只把上邊距從 40px 改成 20px */
    padding-left: 40px;
    padding-right: 40px;
    padding-bottom: 20px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    position: relative;
}

.page-header,
.page-footer {
    flex-shrink: 0;
    color: #999;
    font-size: 0.8rem;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}



.page-content {
    margin-top: auto;
    margin-bottom: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    align-content: flex-start;
    /* 讓內容從頂部開始排列 */
}

.page-category-title {
    font-size: 1.5rem;
    /* 24px */
    font-weight: 700;
    color: #333;
    margin-bottom: 0px;
    margin-top: 0;
    padding-bottom: 1px;
    border-bottom: 2px solid var(--primary-color);
    /* 確保標題和其後的第一個產品項在同一頁，避免標題單獨留在頁尾 */
    break-after: avoid;
    grid-column: 1 / -1;
}

.product-item-print {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 10px;
    display: flex;
    gap: 10px;
    align-items: center;
    overflow: hidden;
    break-inside: avoid;
    /* 【核心】將整個產品框設為定位的父容器 */
    position: relative;
}

.product-item-print-img {
    width: 160px;
    /* 恢復成之前的大小，您可以自行調整 */
    height: 160px;
    flex-shrink: 0;
}

.product-item-print-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-item-print-info {
    flex-grow: 1;
    overflow: hidden;
    /* ▼▼▼ 【核心修正】在資訊區塊底部增加內邊距，為價格標籤騰出空間 ▼▼▼ */
    padding-bottom: 30px;
    /* 這個值可以根據您的價格標籤高度微調 */
}

.product-item-print-info .product-name {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    overflow: hidden;
    white-space: nowrap;
}

/* ▼▼▼ 【核心】使用正確的選擇器來定位價格 ▼▼▼ */
.product-item-print .product-price {
    position: absolute;
    bottom: 10px;
    /* 對齊父容器的 10px padding */
    right: 10px;
    /* 對齊父容器的 10px padding */
    margin: 0;
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-primary);
    background-color: #ffffff;
    /* 確保背景不是透明的 */
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    /* 可選：加個小圓角更好看 */
}

.product-barcode-svg {
    width: 100%;
    max-width: 180px;
    height: 45px;
}

.product-item-print-info .product-ean13 {
    margin: 2px 0 0 0;
    /* 微調與品名間的距離 */
    font-size: 0.8rem;
    color: #888;
}

.product-sku {
    display: inline-block;
    /* 核心：讓元素自適應內容寬度，又能設定內外距 */
    border: 1px solid var(--border-color);
    /* 淺灰色邊框 */
    padding: 2px 6px;
    /* 上下 2px，左右 6px 的內距 */
    font-size: 0.75rem;
    /* 較小的字體 (約 12px) */
    color: var(--text-secondary);
    /* 次要文字顏色 */
    border-radius: var(--border-radius-sm);
    /* 小圓角，與整體風格一致 */
    margin-bottom: 0.5rem;
    /* 與下方的產品名稱保持間距 */
}

.product-item-print-info .product-name {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    overflow: hidden;
    white-space: nowrap;
    /* 確保 JS 能偵測寬度 */
}

/* 瀏覽器列印優化 */
@media print {
    body.print-tool-page {
        overflow: visible;
    }

    .print-settings {
        display: none;
    }

    .print-preview {
        padding: 0;
        overflow: visible;
    }

    .page {
        margin: 0;
        box-shadow: none;
        width: 100%;
        height: 100%;
    }
}

/* --- NEW: Category Description (SEO Content) --- */
.category-description-wrapper {
    margin-bottom: 2rem;
    /* 在描述區塊和下方的工具列之間增加間距 */
    padding: 1.5rem;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* 如果沒有內容 (由 JS 清空)，則不顯示此區塊，避免佔用空間 */
.category-description-wrapper:empty {
    display: none;
}

.page-number-vertical {
    position: absolute;
    bottom: 40px;
    /* 離頁面底部 40px */
    right: 15px;
    /* 離頁面右側 15px */

    /* 核心修改：在旋轉後，使用 translateX 將其移回邊界內 */
    transform: rotate(-90deg) translateX(100%);
    transform-origin: bottom right;

    /* 其他文字樣式不變 */
    font-size: 12px;
    color: #aaa;
    letter-spacing: 2px;
    white-space: nowrap;
}