/* 图片 ↔ PDF 转换器 - 可爱简洁风格（参考 image-pdf-converter.vercel.app） */
.pdf-converter-page {
  --conv-bg: #fef7f4;
  --conv-card: #fff9f7;
  --conv-border: #ffddd2;
  --conv-accent: #ff8a73;
  --conv-accent-deep: #e85d4a;
}

.pdf-converter-page .main-content {
  background: linear-gradient(180deg, #e8f4fc 0%, var(--conv-bg) 15%, #fff5f2 100%);
}

.converter-hero {
  text-align: center;
  padding: 2rem 1rem 1.5rem;
}

.converter-hero h1 {
  font-size: 1.75rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.converter-hero p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.converter-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0 1rem 1.25rem;
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  border: 2px solid var(--conv-border);
  background: #fff;
  color: var(--text-secondary);
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  border-color: var(--conv-accent);
  color: var(--conv-accent-deep);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--conv-accent), var(--conv-accent-deep));
  border-color: var(--conv-accent);
  color: #fff;
}

.converter-section {
  display: none;
  max-width: 520px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
}

.converter-section.active {
  display: block;
}

.converter-card {
  background: var(--conv-card);
  border: 2px solid var(--conv-border);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 8px 24px rgba(255, 138, 115, 0.12);
}

.drop-zone {
  border: 2px dashed var(--conv-border);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.6);
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--conv-accent);
  background: rgba(255, 138, 115, 0.06);
}

.drop-emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.5rem;
}

.drop-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.drop-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  min-height: 0;
}

.preview-list:empty {
  display: none;
}

.preview-item {
  width: 64px;
  height: 64px;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
  border: 2px solid var(--conv-border);
}

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

.preview-item .remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.pdf-preview {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pdf-preview:empty {
  display: none;
}

.converter-actions {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.converter-actions .btn-primary {
  text-decoration: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

.converter-actions .btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-download {
  background: linear-gradient(135deg, #22c55e, #16a34a) !important;
}

.back-link-wrap {
  text-align: center;
  padding-bottom: 3rem;
}

.back-link-wrap .btn-primary {
  text-decoration: none;
}