/* File drop zone */
.drop-zone {
  border: 2px dashed #cfe0f0;
  border-radius: 10px;
  background: #f8fbff;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone:hover, .drop-zone:focus, .drop-zone.dragging {
  border-color: #0078d4;
  background: #eef6ff;
}
.drop-icon { font-size: 30px; line-height: 1; }
.drop-text { margin-top: 10px; font-size: 15px; color: #333; font-weight: 600; }
.drop-link { color: #0078d4; text-decoration: underline; }
.drop-note { margin-top: 6px; font-size: 12px; color: #999; }

.file-info {
  display: none;
  margin-top: 12px;
  font-size: 13px;
  font-weight: 600;
  color: #0078d4;
  word-break: break-all;
}

/* Action */
.btn-merge {
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  background: #0078d4;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-merge:hover:not(:disabled) { background: #005fa3; }
.btn-merge:disabled { opacity: 0.6; cursor: default; }

.pdf-status {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  word-break: break-word;
}
.pdf-status.error { background: #fdecea; border: 1px solid #f5c6c0; color: #c0392b; }
.pdf-status.ok { background: #eaf7ea; border: 1px solid #b6e0b6; color: #107c10; }

/* Output */
.out-head {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.out-head.show { display: flex; }
.out-count { font-size: 13px; color: #555; font-weight: 600; }
.out-btns { display: flex; gap: 8px; }
.btn-out {
  padding: 8px 16px;
  background: #fff;
  color: #0078d4;
  border: 1px solid #0078d4;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn-out:hover { background: #e8f2fc; }
.btn-out.copied { background: #107c10; border-color: #107c10; color: #fff; }

#out-text {
  display: none;
  width: 100%;
  margin-top: 12px;
  min-height: 320px;
  padding: 12px 14px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: 'Consolas', 'D2Coding', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #1a1a1a;
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}
#out-text.show { display: block; }
#out-text:focus { border-color: #0078d4; }