.spreadsheet-table-wrapper {
  width: 100%;
  overflow-x: auto;   /* enables horizontal scroll */
  -webkit-overflow-scrolling: touch; /* smooth scroll on iOS */
}

.spreadsheet-table {
  border-collapse: collapse;
  min-width: 800px;   /* force table to be wider */
}

.spreadsheet-table th,
.spreadsheet-table td {
  border: 1px solid #ddd;
  padding: 6px 12px;
  min-width: 20px;
  max-width: 300px;
  overflow: hidden;
}

.spreadsheet-table th {
  background: #f5f5f5;
  position: sticky;
  top: 0;             /* header sticks on vertical scroll */
  z-index: 2;
  text-align: left;
  font-weight: bold;
}