/*
Theme Name: BookShelf TW
Theme URI: https://example.com/bookshelf-tw
Author: BookShelf Team
Author URI: https://example.com
Description: 一款專為書籍網站設計的 WordPress 主題，前台自動將所有內容轉換為繁體中文顯示，搭配典雅的書香排版風格。
Version: 1.0.0
License: GNU General Public License v2 or later
Text Domain: bookshelf-tw
Tags: books, library, traditional-chinese, reading, portfolio
*/

/* ============================================================
   字型引入 — 使用 Google Fonts Noto Serif TC 繁體字型
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

/* ============================================================
   CSS 自訂屬性
   ============================================================ */
:root {
    --font-serif: 'Noto Serif TC', 'Source Han Serif TC', 'Georgia', serif;
    --font-sans: 'Noto Sans TC', 'PingFang TC', 'Helvetica Neue', sans-serif;
    --color-primary: #2c3e50;
    --color-primary-light: #34495e;
    --color-accent: #8b6914;
    --color-accent-light: #c9a227;
    --color-bg: #faf8f5;
    --color-bg-warm: #f5f0e8;
    --color-bg-card: #ffffff;
    --color-text: #2c2c2c;
    --color-text-muted: #666;
    --color-text-light: #999;
    --color-border: #e0d9ce;
    --color-border-dark: #c8b99a;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.13);
    --transition: 0.2s ease;
    --max-width: 1200px;
}

/* ============================================================
   全域重置
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 確保所有文字使用繁體字型 */
* { font-family: inherit; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-light); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ============================================================
   排版
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-primary);
}
h1 { font-size: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.2rem; }

p { margin-bottom: 1rem; }
blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 0.5rem 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--color-text-muted);
    background: var(--color-bg-warm);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ============================================================
   版面容器
   ============================================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.site-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    padding: 48px 0;
}
.site-content.full-width {
    grid-template-columns: 1fr;
}

/* ============================================================
   頁頭 Header
   ============================================================ */
.site-header {
    background: var(--color-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.site-branding { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.site-logo img { height: 48px; width: auto; }
.site-title-wrap a {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.05em;
}
.site-description {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.1em;
}

/* 導覽 */
.main-navigation { display: flex; align-items: center; }
.main-navigation ul {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.main-navigation li { position: relative; }
.main-navigation a {
    display: block;
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    font-family: var(--font-sans);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
}
.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current-menu-parent > a {
    background: rgba(255,255,255,0.15);
    color: #ffffff;
}

/* 子選單 */
.main-navigation .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 8px 0;
    z-index: 1000;
    flex-direction: column;
}
.main-navigation li:hover > .sub-menu {
    display: flex;
}
.main-navigation .sub-menu a {
    color: var(--color-text);
    padding: 10px 20px;
}
.main-navigation .sub-menu a:hover {
    background: var(--color-bg-warm);
    color: var(--color-primary);
}

/* 搜尋框 */
.header-search { display: flex; align-items: center; gap: 8px; }
.header-search form {
    display: flex;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 24px;
    overflow: hidden;
}
.header-search input {
    background: none;
    border: none;
    padding: 8px 16px;
    color: white;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    width: 200px;
    outline: none;
}
.header-search input::placeholder { color: rgba(255,255,255,0.5); }
.header-search button {
    padding: 8px 16px;
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
}
.header-search button:hover { color: white; }

/* 漢堡選單 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================================
   Hero 橫幅
   ============================================================ */
.hero-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a252f 100%);
    color: white;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('assets/images/book-pattern.svg') repeat;
    opacity: 0.05;
}
.hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-text h1 {
    font-size: 2.8rem;
    color: white;
    line-height: 1.3;
    margin-bottom: 16px;
}
.hero-text p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 32px;
    font-family: var(--font-sans);
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: var(--font-sans);
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary {
    background: var(--color-accent-light);
    color: var(--color-primary);
}
.btn-primary:hover { background: #e6b730; color: var(--color-primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline {
    background: transparent;
    color: white;
    border: 1.5px solid rgba(255,255,255,0.5);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); color: white; border-color: white; }

.hero-books {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    transform: perspective(1000px) rotateY(-5deg);
}
.hero-book-cover {
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    aspect-ratio: 2/3;
    background: var(--color-bg-warm);
    transition: transform var(--transition), box-shadow var(--transition);
}
.hero-book-cover:nth-child(2) { margin-top: 24px; }
.hero-book-cover:nth-child(3) { margin-top: 48px; }
.hero-book-cover img { width: 100%; height: 100%; object-fit: cover; }
.hero-book-cover:hover { transform: translateY(-8px) scale(1.03); box-shadow: 0 16px 40px rgba(0,0,0,0.3); }

/* ============================================================
   公告橫幅 (Marquee)
   ============================================================ */
.announcement-bar {
    background: var(--color-accent);
    color: white;
    padding: 10px 0;
    overflow: hidden;
}
.announcement-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    white-space: nowrap;
    animation: marquee 30s linear infinite;
    font-family: var(--font-sans);
    font-size: 0.875rem;
}
.announcement-inner:hover { animation-play-state: paused; }
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ============================================================
   區塊標題
   ============================================================ */
.section-title {
    text-align: center;
    margin-bottom: 48px;
}
.section-title h2 {
    font-size: 2rem;
    position: relative;
    display: inline-block;
    padding-bottom: 16px;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}
.section-title p {
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    margin-top: 12px;
}

/* ============================================================
   書籍卡片
   ============================================================ */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 28px;
}

.book-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
}
.book-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.book-cover {
    aspect-ratio: 2/3;
    overflow: hidden;
    background: var(--color-bg-warm);
    position: relative;
    /* 兼容不支持 aspect-ratio 的瀏覽器 */
    height: 0;
    padding-top: 150%; /* 3/2 = 1.5 = 150% */
}
.book-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform 0.4s ease;
}
.book-card:hover .book-cover img { transform: scale(1.05); }

/* 外鏈圖片特殊處理 */
.book-cover img[src*="http"] {
    background: linear-gradient(135deg, var(--color-bg-warm), #e8e0d5);
}

.book-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #2c3e50, #1a252f);
    color: rgba(255,255,255,0.7);
    font-family: var(--font-serif);
    font-size: 1rem;
    padding: 20px;
    text-align: center;
}

.book-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-accent);
    color: white;
    font-size: 0.7rem;
    font-family: var(--font-sans);
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 24px;
}

.book-info { padding: 16px; }
.book-info .book-genre {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-family: var(--font-sans);
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    text-transform: uppercase;
}
.book-info h3 {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.book-info h3 a { color: var(--color-primary); }
.book-info h3 a:hover { color: var(--color-accent); }

.book-author {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    margin-bottom: 10px;
}

.book-rating { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; }
.stars { color: var(--color-accent-light); font-size: 0.85rem; }
.rating-count { font-size: 0.75rem; color: var(--color-text-light); font-family: var(--font-sans); }

.book-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: #c0392b;
    font-family: var(--font-sans);
}
.book-price .original-price {
    font-size: 0.85rem;
    color: var(--color-text-light);
    text-decoration: line-through;
    margin-left: 6px;
    font-weight: 400;
}

.book-card .book-actions {
    padding: 0 16px 16px;
    display: flex;
    gap: 8px;
}
.btn-sm {
    padding: 7px 14px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
}
.btn-add-cart {
    flex: 1;
    background: var(--color-primary);
    color: white;
    text-align: center;
}
.btn-add-cart:hover { background: var(--color-primary-light); color: white; }
.btn-wishlist {
    background: var(--color-bg-warm);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}
.btn-wishlist:hover { background: #fce4e4; color: #c0392b; border-color: #e8a0a0; }

/* ============================================================
   書籍詳情頁
   ============================================================ */
.book-detail { display: grid; grid-template-columns: 280px 1fr; gap: 48px; }

.book-detail-cover {
    position: sticky;
    top: 100px;
    height: fit-content;
}
.book-detail-cover-img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    aspect-ratio: 2/3;
    /* 兼容不支持 aspect-ratio 的瀏覽器 */
    height: 0;
    padding-top: 150%; /* 3/2 = 1.5 = 150% */
    position: relative;
}
.book-detail-cover-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.book-detail-info .book-title {
    font-size: 2rem;
    margin-bottom: 8px;
}
.book-meta-list { margin: 20px 0; }
.book-meta-item {
    display: flex;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    font-family: var(--font-sans);
    font-size: 0.9rem;
}
.book-meta-item .meta-label {
    color: var(--color-text-muted);
    min-width: 80px;
    flex-shrink: 0;
}
.book-meta-item .meta-value { color: var(--color-text); font-weight: 500; }

.book-synopsis {
    margin: 24px 0;
    padding: 20px 24px;
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-accent);
}
.book-synopsis h4 { margin-bottom: 12px; font-size: 1rem; }

.book-purchase-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.price-display .main-price {
    font-size: 2rem;
    font-weight: 700;
    color: #c0392b;
    font-family: var(--font-sans);
}

/* ============================================================
   通用頁面 Hero 區域
   ============================================================ */
.page-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a252f 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
}
.page-hero h1 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 12px;
    font-family: var(--font-serif);
}
.page-hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.85;
    font-family: var(--font-sans);
}
.page-content {
    padding: 60px 0;
}

/* ============================================================
   分類 Taxonomy 頁面
   ============================================================ */
.genre-hero {
    background: var(--color-bg-warm);
    border-bottom: 1px solid var(--color-border);
    padding: 40px 0;
    margin-bottom: 40px;
}
.genre-hero h1 { font-size: 2.5rem; }
.genre-hero p { color: var(--color-text-muted); font-family: var(--font-sans); margin-top: 8px; }

.genre-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}
.genre-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px 16px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
}
.genre-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.genre-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
    background: var(--color-bg-warm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}
.genre-card h3 { font-size: 0.95rem; margin-bottom: 4px; }
.genre-card span { font-size: 0.75rem; color: var(--color-text-light); font-family: var(--font-sans); }

/* ============================================================
   特輯 Banner (精選書單)
   ============================================================ */
.featured-list-banner {
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-lg);
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
    margin: 60px 0;
}
.featured-list-text h2 { color: white; font-size: 1.6rem; margin-bottom: 12px; }
.featured-list-text p { color: rgba(255,255,255,0.75); font-family: var(--font-sans); }
.featured-list-books { display: flex; gap: -16px; }
.featured-list-books .mini-cover {
    width: 64px;
    height: 96px;
    border-radius: var(--radius-sm);
    border: 2px solid rgba(255,255,255,0.3);
    overflow: hidden;
    margin-left: -16px;
    box-shadow: var(--shadow-md);
}
.featured-list-books .mini-cover:first-child { margin-left: 0; }
.featured-list-books .mini-cover img { width: 100%; height: 100%; object-fit: cover; }

/* ============================================================
   側欄
   ============================================================ */
.widget-area { font-family: var(--font-sans); }
.widget {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 28px;
}
.widget-title {
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-serif);
    color: var(--color-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
}

.widget-book-item {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}
.widget-book-item:last-child { border-bottom: none; }
.widget-book-thumb {
    width: 48px;
    height: 72px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--color-bg-warm);
}
.widget-book-thumb img { width: 100%; height: 100%; object-fit: cover; }
.widget-book-text h5 { font-size: 0.85rem; font-weight: 500; margin-bottom: 4px; line-height: 1.4; }
.widget-book-text span { font-size: 0.75rem; color: var(--color-text-muted); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
    background: var(--color-bg-warm);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 4px 12px;
    border-radius: 24px;
    font-size: 0.8rem;
    transition: all var(--transition);
}
.tag-cloud a:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ============================================================
   評論區
   ============================================================ */
.comments-area {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}
.comment-list { list-style: none; }
.comment {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}
.comment-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--color-bg-warm);
}
.comment-avatar img { width: 100%; height: 100%; object-fit: cover; }
.comment-author { font-weight: 500; font-size: 0.9rem; margin-bottom: 4px; }
.comment-date { font-size: 0.75rem; color: var(--color-text-light); margin-bottom: 8px; font-family: var(--font-sans); }
.comment-content p { font-size: 0.9rem; margin-bottom: 0; }

/* ============================================================
   頁尾 Footer
   ============================================================ */
.site-footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.75);
    margin-top: 80px;
}
.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding: 60px 0 40px;
}
.footer-brand .site-title { color: white; font-size: 1.3rem; margin-bottom: 12px; }
.footer-brand p { font-size: 0.875rem; line-height: 1.7; font-family: var(--font-sans); }
.footer-col h4 {
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 16px;
    font-family: var(--font-serif);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    font-family: var(--font-sans);
    transition: color var(--transition);
}
.footer-col ul li a:hover { color: white; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    font-family: var(--font-sans);
}
.footer-social { display: flex; gap: 12px; }
.social-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: background var(--transition);
}
.social-btn:hover { background: var(--color-accent); color: white; }

/* ============================================================
   麵包屑 Breadcrumb
   ============================================================ */
.breadcrumb {
    background: var(--color-bg-warm);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
}
.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
}
.breadcrumb-list li a { color: var(--color-text-muted); }
.breadcrumb-list li a:hover { color: var(--color-accent); }
.breadcrumb-list li:not(:last-child)::after {
    content: '›';
    margin-left: 8px;
    color: var(--color-text-light);
}
.breadcrumb-list li:last-child { color: var(--color-text); }

/* ============================================================
   分頁
   ============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
    flex-wrap: wrap;
}
.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    color: var(--color-text);
    transition: all var(--transition);
}
.pagination a:hover, .pagination .current {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ============================================================
   通知 / Flash 訊息
   ============================================================ */
.notice {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    border-left: 4px solid;
}
.notice-success { background: #eafaf1; border-color: #27ae60; color: #1e8449; }
.notice-warning { background: #fef9e7; border-color: #f39c12; color: #d68910; }
.notice-error   { background: #fdedec; border-color: #e74c3c; color: #c0392b; }
.notice-info    { background: #eaf2fb; border-color: #2980b9; color: #1a5276; }

/* ============================================================
   書評卡
   ============================================================ */
.review-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
}
.review-quote {
    font-size: 3rem;
    color: var(--color-accent);
    line-height: 1;
    font-family: Georgia, serif;
    margin-bottom: 12px;
}
.review-text { font-size: 0.95rem; line-height: 1.7; color: var(--color-text); font-style: italic; }
.review-author { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.review-author img { width: 44px; height: 44px; border-radius: 50%; }
.review-author-info h5 { font-size: 0.9rem; font-weight: 500; }
.review-author-info span { font-size: 0.75rem; color: var(--color-text-light); font-family: var(--font-sans); }

/* ============================================================
   作者資訊
   ============================================================ */
.author-bio-box {
    display: flex;
    gap: 24px;
    background: var(--color-bg-warm);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin: 40px 0;
    border: 1px solid var(--color-border);
}
.author-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}
.author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.author-info h3 { font-size: 1.2rem; margin-bottom: 4px; }
.author-info span { font-size: 0.85rem; color: var(--color-accent); font-family: var(--font-sans); margin-bottom: 12px; display: block; }

/* ============================================================
   Loading / Skeleton
   ============================================================ */
@keyframes skeleton {
    0%  { background-position: -600px 0; }
    100%{ background-position: 600px 0; }
}
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 600px 100%;
    animation: skeleton 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ============================================================
   響應式
   ============================================================ */
@media (max-width: 1024px) {
    .site-content { grid-template-columns: 1fr; }
    .footer-main { grid-template-columns: 1fr 1fr; }
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-books { display: none; }
}
@media (max-width: 768px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    .main-navigation { display: none; }
    .main-navigation.is-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0; right: 0;
        background: var(--color-primary);
        padding: 16px;
        z-index: 999;
    }
    .main-navigation.is-open ul {
        flex-direction: column;
        width: 100%;
    }
    .main-navigation.is-open li {
        width: 100%;
    }
    .main-navigation.is-open a {
        display: block;
        padding: 12px 16px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .menu-toggle { display: flex; }
    .books-grid { grid-template-columns: repeat(2, 1fr); }
    .book-detail { grid-template-columns: 1fr; }
    .footer-main { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .featured-list-banner { grid-template-columns: 1fr; }
    .hero-text h1 { font-size: 2rem; }
    .container { padding: 0 16px; }
}
@media (max-width: 480px) {
    .books-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   工具類
   ============================================================ */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.section-padding { padding: 60px 0; }
.section-bg-warm { background: var(--color-bg-warm); }