/**
 * Ebook 单页面样式
 *
 * @package     block-canvas Child
 * @subpackage  Assets
 * @author      JoshuaWang2019
 * @version     1.0.0
 * @since       2025-07-06
 */

/* Ebook 容器样式 */
.ebook-container {
  padding: var(--spacing-xl) var(--spacing-lg) !important;
  background: var(--theme-gradient-background) !important;
  min-height: 100vh !important;
  box-sizing: border-box !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: flex-start !important;
}

.ebook-content-wrapper {
  max-width: 800px !important;
  width: 100% !important;
  margin: 0 auto !important;
  background: var(--card-bg) !important;
  border-radius: var(--card-radius) !important;
  overflow: hidden !important;
  box-shadow: var(--card-shadow) !important;
  position: relative !important;
  box-sizing: border-box !important;
  flex-shrink: 0 !important;
}

/* 电子书封面图片容器样式 */
.ebook-feature-image {
  width: 100% !important;
  margin-bottom: 0 !important;
  position: relative !important;
  height: 0 !important;
  padding-bottom: 42.56% !important; /* 标准图书封面比例 */
  overflow: hidden !important;
  background: #f1f5f9 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

/* 图片占位图标 */
.ebook-feature-image::before {
  content: '📚' !important;
  font-size: 3rem !important;
  color: #a0aec0 !important;
  position: absolute !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
  z-index: 1 !important;
  opacity: 0.3 !important;
  pointer-events: none !important;
}

/* 现代浏览器的 aspect-ratio 支持 */
@supports (aspect-ratio: 1) {
  .ebook-feature-image {
    height: auto !important;
    padding-bottom: 0 !important;
    aspect-ratio: 900 / 383 !important;
  }
}

/* 电子书封面图片本体样式 */
.ebook-feature-image img,
.ebook-feature-image .wp-post-image,
.ebook-feature-image .ebook-cover-img {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  object-position: center !important;
  display: block !important;
  margin: 0 !important;
  transition: transform 0.3s ease !important;
  z-index: 1000 !important;
}

/* 图片加载成功时隐藏占位图标 */
.ebook-feature-image.has-image {
  background: transparent !important;
}

.ebook-feature-image.has-image::before {
  display: none !important;
}

/* 悬停效果 */
.ebook-feature-image:hover img,
.ebook-feature-image:hover .wp-post-image,
.ebook-feature-image:hover .ebook-cover-img {
  transform: scale(1.02) !important;
}

/* 电子书头部信息样式 */
.ebook-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg) var(--spacing-xl) !important;
  border-bottom: 1px solid var(--theme-gray-200);
  background: var(--theme-gradient-light);
}

.ebook-title {
  font-size: var(--font-size-4xl) !important;
  font-weight: var(--font-weight-bold) !important;
  color: var(--theme-gray-800) !important;
  margin: 0 0 var(--spacing-lg) 0 !important;
  line-height: 1.3 !important;
  text-align: center;
}

.ebook-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-xl);
  margin-top: var(--spacing-lg);
  justify-content: center;
  align-items: center;
}

.ebook-author {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--theme-primary-50);
  border-radius: 20px;
  border: 1px solid var(--theme-primary-200);
  font-size: var(--font-size-sm);
  transition: all 0.3s ease;
}

.ebook-author:hover {
  background: var(--theme-primary-100);
  border-color: var(--theme-primary-300);
  transform: translateY(-1px);
}

.meta-label {
  font-weight: var(--font-weight-semibold) !important;
  color: var(--theme-primary) !important;
  font-size: var(--font-size-xs) !important;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.meta-value {
  color: var(--theme-gray-800) !important;
  font-size: var(--font-size-sm) !important;
  font-weight: var(--font-weight-medium) !important;
}

/* 区块标题样式 */
.section-title {
  font-size: var(--font-size-2xl) !important;
  font-weight: var(--font-weight-semibold) !important;
  color: var(--theme-gray-800) !important;
  margin: 0 0 var(--spacing-lg) 0 !important;
  padding-bottom: var(--spacing-sm) !important;
  border-bottom: 3px solid var(--theme-primary) !important;
  display: inline-block !important;
}

/* 电子书简介区域样式 */
.ebook-description-section {
  padding: var(--spacing-xl) !important;
  border-bottom: 1px solid var(--theme-gray-200);
  background: var(--card-bg);
}

.ebook-description-content {
  margin-top: var(--spacing-lg) !important;
  line-height: 1.8 !important;
  color: var(--theme-gray-700) !important;
  font-size: var(--font-size-lg) !important;
}

.ebook-description-content p {
  margin-bottom: var(--spacing-lg) !important;
}

.ebook-description-content h1,
.ebook-description-content h2,
.ebook-description-content h3,
.ebook-description-content h4,
.ebook-description-content h5,
.ebook-description-content h6 {
  margin-top: var(--spacing-xl) !important;
  margin-bottom: var(--spacing-lg) !important;
  color: var(--theme-gray-800) !important;
}

.ebook-description-content ul,
.ebook-description-content ol {
  margin: var(--spacing-lg) 0 !important;
  padding-left: var(--spacing-xl) !important;
}

.ebook-description-content li {
  margin-bottom: var(--spacing-sm) !important;
}

/* 电子书下载区域样式 */
.ebook-download-section {
  padding: var(--spacing-xl) !important;
  background: var(--card-bg);
  border-bottom: 1px solid var(--theme-gray-200);
}

.ebook-file-area {
  margin-top: var(--spacing-lg) !important;
}

.ebook-file-item {
  background: var(--theme-gradient-light) !important;
  border: 1px solid var(--theme-gray-200) !important;
  border-radius: var(--card-radius) !important;
  padding: var(--spacing-xl) !important;
  transition: all 0.3s ease !important;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.ebook-file-item:hover {
  border-color: var(--theme-primary) !important;
  box-shadow: var(--shadow-md) !important;
  transform: translateY(-2px);
}

.file-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex: 1;
}

.file-icon {
  position: relative;
  font-size: 3rem;
  color: var(--theme-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.file-type-badge {
  background: var(--theme-primary) !important;
  color: white !important;
  font-size: var(--font-size-xs) !important;
  font-weight: var(--font-weight-bold) !important;
  padding: 2px 6px !important;
  border-radius: 4px !important;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.file-details {
  flex: 1;
}

.file-name {
  font-size: var(--font-size-lg) !important;
  font-weight: var(--font-weight-semibold) !important;
  color: var(--theme-gray-800) !important;
  margin-bottom: var(--spacing-xs) !important;
}

.file-size,
.file-format {
  font-size: var(--font-size-sm) !important;
  color: var(--theme-gray-600) !important;
  margin-bottom: var(--spacing-xs) !important;
}

.file-actions {
  display: flex;
  align-items: center;
}

.ebook-download-btn {
  display: flex !important;
  align-items: center !important;
  gap: var(--spacing-sm) !important;
  padding: var(--spacing-md) var(--spacing-lg) !important;
  font-size: var(--font-size-base) !important;
  font-weight: var(--font-weight-semibold) !important;
  transition: all 0.3s ease !important;
}

.ebook-download-btn:hover {
  transform: translateY(-2px) !important;
  box-shadow: var(--shadow-lg) !important;
}

.download-icon {
  font-size: var(--font-size-lg) !important;
}

.no-file-message {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--theme-gray-500);
  font-style: italic;
}

/* 导航区域样式 */
.ebook-navigation {
  padding: var(--spacing-xl) !important;
  text-align: center;
  background: var(--theme-gradient-light);
}

.back-to-list {
  display: inline-flex !important;
  align-items: center !important;
  gap: var(--spacing-sm) !important;
  padding: var(--spacing-md) var(--spacing-lg) !important;
  font-size: var(--font-size-base) !important;
  font-weight: var(--font-weight-medium) !important;
  transition: all 0.3s ease !important;
}

.back-to-list:hover {
  transform: translateY(-1px) !important;
}

.back-icon {
  font-size: var(--font-size-lg) !important;
}

/* 移动设备优化 */
@media (max-width: 768px) {
  .ebook-container {
    padding: var(--spacing-lg) var(--spacing-md) !important;
  }

  .ebook-content-wrapper {
    margin: 0 !important;
    border-radius: var(--border-radius-sm) !important;
  }

  .ebook-file-item {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .file-info {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }

  .file-actions {
    width: 100%;
    justify-content: center;
  }

  .ebook-download-btn {
    width: 100%;
    max-width: 250px;
    justify-content: center;
  }
}

/* 小屏设备优化 */
@media (max-width: 480px) {
  .ebook-header {
    padding: var(--spacing-lg) var(--spacing-md) !important;
  }

  .ebook-description-section,
  .ebook-download-section,
  .ebook-navigation {
    padding: var(--spacing-lg) var(--spacing-md) !important;
  }

  .ebook-title {
    font-size: var(--font-size-3xl) !important;
  }

  .section-title {
    font-size: var(--font-size-xl) !important;
  }
}

/* ==========================================================================
   深色模式适配
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  .ebook-container {
    background: var(--theme-gray-50) !important;
  }

  .ebook-content-wrapper {
    background: var(--card-bg) !important;
    border-color: var(--theme-gray-200) !important;
  }

  /* 电子书头部信息区域深色模式 */
  .ebook-header {
    background: #2d3748 !important;
    border-bottom: 1px solid #4a5568 !important;
  }

  .ebook-title {
    color: #f7fafc !important;
  }

  /* 元数据标签深色模式 */
  .ebook-author {
    background: #4a5568 !important;
    border: 1px solid #718096 !important;
  }

  .meta-label {
    color: #68d391 !important;
  }

  .meta-value {
    color: #e2e8f0 !important;
  }

  /* 电子书封面图片容器深色模式 */
  .ebook-feature-image {
    background: #2d3748 !important;
  }

  .ebook-feature-image.has-image {
    background: transparent !important;
  }

  .ebook-feature-image::before {
    color: #cbd5e0 !important;
  }

  /* 区块标题深色模式 */
  .section-title {
    color: #f7fafc !important;
    border-bottom-color: #68d391 !important;
  }

  /* 内容区域深色模式 */
  .ebook-description-section,
  .ebook-download-section {
    background: #2d3748 !important;
    border-bottom: 1px solid #4a5568 !important;
  }

  .ebook-description-content {
    color: #e2e8f0 !important;
  }

  .ebook-description-content h1,
  .ebook-description-content h2,
  .ebook-description-content h3,
  .ebook-description-content h4,
  .ebook-description-content h5,
  .ebook-description-content h6 {
    color: #f7fafc !important;
  }

  /* 文件下载区域深色模式 */
  .ebook-file-item {
    background: #4a5568 !important;
    border-color: #718096 !important;
  }

  .file-name {
    color: #f7fafc !important;
  }

  .file-size,
  .file-format {
    color: #cbd5e0 !important;
  }

  /* 导航区域深色模式 */
  .ebook-navigation {
    background: #2d3748 !important;
  }
}

/* 加载动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ebook-content-wrapper {
  animation: fadeIn 0.6s ease-out;
}