/* Excel Keyword Filter — styles bổ sung cho giao diện upload */

.drop-zone {
  border: 2px dashed #adb5bd;
  border-radius: 0.75rem;
  background-color: #f8f9fa;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: #0d6efd;
  background-color: #eef4ff;
  outline: none;
}

.drop-zone.dragging {
  border-color: #0d6efd;
  background-color: #dbe9ff;
}

/* Khu vực kết quả */
#resultBox {
  border-radius: 0.5rem;
}

/* Code / ký tự nhấn mạnh trong alert */
.alert code {
  background: rgba(0, 0, 0, 0.06);
  padding: 0.15rem 0.35rem;
  border-radius: 0.25rem;
}

/* Placeholder ô nhập keywords */
#keywords::placeholder {
  font-style: italic;
  color: #999;
  opacity: 1;
}