/* PDF 合并/拆分工具 UI(中英页共用) */
.pdf-dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  background: var(--card); box-shadow: var(--shadow);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; text-align: center; color: var(--text2);
  cursor: pointer; transition: border-color .15s, background .15s;
  padding: 40px 20px; max-width: 720px; margin: 0 auto;
}
.pdf-dropzone.over { border-color: var(--accent); background: var(--accent-soft); }
.pdf-dropzone .big { font-size: 16px; color: var(--text); font-weight: 500; }

.pdf-list { max-width: 720px; margin: 16px auto 0; display: flex; flex-direction: column; gap: 10px; }
.pdf-item {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 10px 14px; box-shadow: var(--shadow);
}
.pdf-item .pdf-ico {
  flex: none; width: 44px; height: 44px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: #fbe6e5; color: #e24841;
  font-size: 11px; font-weight: 700; letter-spacing: .03em;
}
.pdf-item .meta { flex: 1; min-width: 0; }
.pdf-item .fname {
  font-size: 13.5px; font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pdf-item .fsize { font-size: 12px; color: var(--text2); margin-top: 3px; font-variant-numeric: tabular-nums; }
.pdf-item .ops { display: flex; gap: 6px; }
.pdf-item .ops button {
  font: inherit; font-size: 13px;
  width: 30px; height: 30px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text2);
  cursor: pointer;
}
.pdf-item .ops button:hover { color: var(--accent); border-color: var(--accent); }

.pdf-range { max-width: 720px; margin: 14px auto 0; display: none; align-items: center; gap: 10px; justify-content: center; font-size: 13px; color: var(--text2); }
.pdf-range input {
  font: inherit; font-size: 14px; width: 220px;
  border: 1px solid var(--border); border-radius: 10px; padding: 9px 12px;
  background: var(--bg); color: var(--text);
  font-variant-numeric: tabular-nums;
}

.pdf-actions { display: flex; justify-content: center; gap: 10px; margin-top: 18px; }
.pdf-actions button {
  font: inherit; font-size: 13px; font-weight: 500;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  border-radius: 999px; padding: 8px 20px; cursor: pointer;
  transition: opacity .12s, transform .12s;
}
.pdf-actions button:active { transform: scale(.97); }
.pdf-actions button.primary { background: var(--dark-btn); border-color: var(--dark-btn); color: #fff; }
.pdf-actions button.primary:hover { opacity: .88; }
.pdf-actions button:disabled { opacity: .45; cursor: not-allowed; }

.pdf-status { text-align: center; font-size: 12.5px; color: var(--text2); margin-top: 12px; min-height: 18px; }
.pdf-empty { text-align: center; font-size: 13px; color: var(--text2); padding: 14px 0 4px; }