/* 簡約小說閱讀網站樣式 */
:root {
  --bg: #faf9f7;
  --text: #2c2c2c;
  --text-light: #666;
  --accent: #4a4a4a;
  --border: #e5e5e5;
  --card-bg: #ffffff;
  --max-width: 720px;
  --font-serif: "Noto Serif TC", "Source Han Serif TC", "Songti TC", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* 容器 */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 頁首 */
.site-header {
  padding: 40px 0 30px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.site-header h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.site-header p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* 首頁書本選擇 */
.book-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-bottom: 60px;
}

.book-card {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
  text-decoration: none;
}

.book-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
  background: #e8e6e3;
}

.book-card .info {
  padding: 18px 16px 22px;
}

.book-card h2 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.book-card .author {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* 書籍介紹頁 */
.book-hero {
  text-align: center;
  margin-bottom: 40px;
}

.book-hero img {
  max-width: 220px;
  width: 100%;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  margin-bottom: 24px;
}

.book-hero h1 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.book-hero .meta {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.book-hero .desc {
  max-width: 500px;
  margin: 0 auto;
  color: var(--text-light);
  font-size: 0.95rem;
}

/* 章節目錄 */
.chapter-list {
  max-width: 480px;
  margin: 0 auto 60px;
}

.chapter-list h2 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 20px;
  text-align: center;
  font-weight: 600;
}

.chapter-list ol {
  list-style: none;
  counter-reset: chapter;
}

.chapter-list li {
  border-bottom: 1px solid var(--border);
}

.chapter-list li a {
  display: block;
  padding: 14px 8px;
  color: var(--text);
  transition: background 0.15s;
}

.chapter-list li a:hover {
  background: rgba(0,0,0,0.03);
  text-decoration: none;
}

.chapter-list .num {
  color: var(--text-light);
  margin-right: 12px;
  font-size: 0.9rem;
}

/* 閱讀頁 */
.reader {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 20px 80px;
}

.reader-header {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.reader-header .back {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.reader-header h1 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
}

.reader-content {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.9;
  letter-spacing: 0.02em;
}

.reader-content p {
  margin-bottom: 1.4em;
}

/* 章節導航 */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 50px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  gap: 16px;
}

.chapter-nav a {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--card-bg);
  transition: background 0.15s;
}

.chapter-nav a:hover {
  background: #f0eeeb;
  text-decoration: none;
}

.chapter-nav .disabled {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--card-bg);
  opacity: 0.4;
  pointer-events: none;
}

/* 頁尾 */
.site-footer {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-light);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* 響應式 */
@media (max-width: 600px) {
  .book-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .site-header h1 {
    font-size: 1.5rem;
  }

  .reader-content {
    font-size: 1.08rem;
  }

  .chapter-nav {
    flex-direction: column;
  }

  .chapter-nav a {
    width: 100%;
    text-align: center;
  }
}

/* ========== 投稿 / 管理表單 ========== */
.form-page {
  max-width: 560px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.form-page h1 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 8px;
}

.form-page .subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text);
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #999;
}

.form-group textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.6;
}

.form-group textarea.content {
  min-height: 280px;
  font-family: var(--font-serif);
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
}

.btn-primary:hover {
  background: #333;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
}

.btn-sm.approve {
  background: #2d6a4f;
  color: #fff;
  border-color: #2d6a4f;
}

.btn-sm.reject {
  background: #fff;
  color: #9b2226;
  border-color: #e0b0b0;
}

.btn-sm.delete {
  color: #9b2226;
}

.msg {
  padding: 14px 16px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 0.95rem;
  display: none;
}

.msg.show { display: block; }
.msg.ok { background: #d8f3dc; color: #1b4332; }
.msg.err { background: #f8d7da; color: #721c24; }

.nav-links {
  text-align: center;
  margin-top: 24px;
  font-size: 0.9rem;
}

.nav-links a {
  margin: 0 10px;
  color: var(--text-light);
}

/* 管理後台 */
.admin-login {
  max-width: 360px;
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.admin-section {
  margin-bottom: 48px;
}

.admin-section h2 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.admin-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 12px;
}

.admin-card .meta {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 4px 0 10px;
}

.admin-card .actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.admin-card .preview {
  font-size: 0.9rem;
  color: var(--text-light);
  max-height: 80px;
  overflow: hidden;
  line-height: 1.5;
}

.empty-hint {
  color: var(--text-light);
  font-size: 0.95rem;
  text-align: center;
  padding: 24px;
}

/* 動態書卡（無封面時） */
.book-card.no-cover .placeholder {
  width: 100%;
  aspect-ratio: 3/4;
  background: linear-gradient(145deg, #e8e6e3, #d4d2cf);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: #888;
  padding: 20px;
  text-align: center;
}

.site-header .header-nav {
  margin-top: 12px;
  font-size: 0.9rem;
}

.site-header .header-nav a {
  color: var(--text-light);
  margin: 0 8px;
}