/* ========================================
   论文阅读功能 — Apple 学术风格
   ======================================== */

/* --- 拖放区Reader变体 --- */
.drop-icon-reader {
  background: rgba(255, 59, 48, 0.08);
  color: var(--color-red);
}

.drop-zone:hover .drop-icon-reader {
  transform: translateY(-2px);
}

/* --- 处理进度 --- */
.reader-loading-section {
  padding: 60px 0;
}

.reader-loading-section.hidden { display: none; }

.reader-progress-wrapper {
  max-width: 480px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.reader-progress-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.reader-progress-header i {
  font-size: 20px;
  color: var(--color-accent);
}

.reader-progress-bar {
  height: 4px;
  background: var(--color-border-light);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}

.reader-progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.4s ease;
}

.reader-progress-text {
  font-size: 13px;
  color: var(--color-text-tertiary);
  text-align: center;
}

/* --- 阅读器工具栏 --- */
.reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

.reader-toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reader-count {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.reader-count i {
  font-size: 16px;
  color: var(--color-accent);
}

.reader-count strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.reader-toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.add-more-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-sans);
  overflow: hidden;
}

.add-more-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-bg);
}

.add-more-btn .file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* --- 结果区 --- */
.reader-results-section {
  padding-top: 32px;
  padding-bottom: 60px;
}

.reader-results-section.hidden { display: none; }

.reader-report-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* --- 论文报告卡片 --- */
.report-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
  animation: cardFadeIn 0.5s ease both;
}

.report-card:hover {
  box-shadow: var(--shadow-md);
}

.report-card-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 28px 16px;
  border-bottom: 1px solid var(--color-border-light);
}

.report-card-number {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.report-card-title-area {
  flex: 1;
  min-width: 0;
}

.report-card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.report-card-meta {
  font-size: 12px;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.report-card-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.report-card-meta-item i {
  font-size: 12px;
}

.report-card-status {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 20px;
}

/* 卡片头部操作区 */
.report-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.report-pdf-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-family: var(--font-sans);
}

.report-pdf-link i {
  font-size: 14px;
  color: var(--color-red);
}

.report-pdf-link:hover {
  border-color: var(--color-red);
  color: var(--color-red);
  background: rgba(255, 59, 48, 0.05);
}

.status-processing {
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent);
}

.status-done {
  background: rgba(52, 199, 89, 0.08);
  color: var(--color-green);
}

.status-error {
  background: rgba(255, 59, 48, 0.08);
  color: var(--color-red);
}

/* --- 报告内容区 --- */
.report-card-body {
  padding: 24px 28px;
}

.report-section {
  margin-bottom: 24px;
}

.report-section:last-child {
  margin-bottom: 0;
}

.report-section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.report-section-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.report-section-icon.icon-question {
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent);
}

.report-section-icon.icon-method {
  background: rgba(175, 82, 222, 0.08);
  color: var(--color-purple);
}

.report-section-icon.icon-conclusion {
  background: rgba(52, 199, 89, 0.08);
  color: var(--color-green);
}

.report-section-icon.icon-innovation {
  background: rgba(255, 149, 0, 0.08);
  color: var(--color-orange);
}

.report-section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
}

.report-section-content {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  padding-left: 36px;
}

.report-section-content p {
  margin-bottom: 6px;
}

.report-section-content p:last-child {
  margin-bottom: 0;
}

/* 方法详情区域 */
.method-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  padding-left: 36px;
}

.method-detail-item {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.method-detail-item .label {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-bottom: 3px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.method-detail-item .value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.method-detail-item .value .design-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 2px;
}

.design-tag-yes {
  background: rgba(52, 199, 89, 0.12);
  color: #248A3D;
}

.design-tag-no {
  background: rgba(142, 142, 147, 0.1);
  color: #636366;
}

/* 论文报告中的方法标签列表 */
.report-method-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
  padding-left: 36px;
}

/* 处理中骨架屏 */
.report-skeleton {
  padding: 24px 28px;
}

.skeleton-line {
  height: 14px;
  background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-bg) 50%, var(--color-border-light) 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  margin-bottom: 12px;
  animation: skeletonShimmer 1.5s infinite;
}

.skeleton-line:nth-child(1) { width: 85%; }
.skeleton-line:nth-child(2) { width: 70%; }
.skeleton-line:nth-child(3) { width: 90%; }
.skeleton-line:nth-child(4) { width: 60%; }

@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- 报告卡片展开/收起 --- */
.report-card-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px;
  border: none;
  border-top: 1px solid var(--color-border-light);
  background: transparent;
  color: var(--color-text-tertiary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  width: 100%;
  transition: all 0.2s;
  font-family: var(--font-sans);
}

.report-card-toggle:hover {
  color: var(--color-accent);
  background: var(--color-accent-bg);
}

.report-card-toggle i {
  transition: transform 0.3s ease;
}

.report-card.collapsed .report-card-body {
  display: none;
}

.report-card.collapsed .report-card-toggle i {
  transform: rotate(180deg);
}

/* --- 响应式 --- */
@media (max-width: 768px) {
  .reader-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .reader-toolbar-right {
    flex-direction: column;
  }

  .report-card-header {
    flex-direction: column;
    padding: 20px;
  }

  .report-card-actions {
    flex-direction: row;
    width: 100%;
    justify-content: flex-end;
  }

  .report-card-body {
    padding: 20px;
  }

  .report-section-content {
    padding-left: 0;
  }

  .method-detail-grid {
    grid-template-columns: 1fr;
    padding-left: 0;
  }

  .report-method-tags {
    padding-left: 0;
  }
}