message: Update _style.scss
diff: /* prettier-ignore */
  --item-size: calc(
  (
  - 100vw - // page width
  + 100vw -
  var(--column-padding) -
  #{$equipped-item-total-outset} -
  var(--combined-item-margins)
  /* prettier-ignore */
  --item-size: calc(
  (
  - 100vw - // page width
  + 100vw -
  var(--column-padding) -
  #{$equipped-item-total-outset} -
  var(--combined-item-margins)
  