body {
  font-family: system-ui, -apple-system, "Noto Sans TC", sans-serif;
  padding: 20px;
}

#list { line-height: 1.9; padding-left: 20px; }
#list li { cursor: pointer; width: fit-content; }

#list li:hover { text-decoration: underline; }

/* 有 data-selected 就加樣式 */
#list li[data-selected="true"] {
  font-weight: 700;
  background: #fff3bf;
}

#display {
  margin-top: 14px;
  padding: 10px;
  border: 1px solid #ddd;
  min-height: 24px;
}