Template:Item Infobox/styles.css

/* ═════════════ Item infobox (minimal) ═════════════ */
table.item-infobox {
  float: right;
  clear: right;
  width: 220px;

  background-color: #fefefe;      /* ← black */
  color: #fff;                 /* default text inside cells */

  border: 4px solid #000000; 
  border-radius: 12px;
  border-collapse: separate;
  box-shadow: 0 0 0 2px rgba(0,0,0,0.4);
}

table.item-infobox th.header-main {
  background-color: #000000;   /* darker header strip */
  color: #fff;
  font-size: 140%;
  text-align: center;
  padding: 6px 0;
}

table.item-infobox td.img-cell {
  text-align: center;
  padding: 8px 0;
}