:focus-visible { outline: 2px solid CanvasText; outline-offset: 2px; }


.menuContent h2 {
    position: relative;
    display: inline-block;
    /* font-size: 1.5em; */
    margin: 0 auto;
    padding: 0;
    text-align: center;
}

/* カードの手触り感：ふわっと浮く／影が深くなる */
@media (hover: hover) {
  .piece-card {
    position: relative;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    will-change: transform;
    border: 1px solid rgba(0,0,0,.06);
  }
  .piece-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 .75rem 1.5rem rgba(0,0,0,.12);
    border-color: rgba(0,0,0,.12);
  }
  .piece-card:active {
    transform: translateY(-1px) scale(.997);
  }
}

/* キーボード操作時のフォーカスリング（アクセシビリティ） */
.piece-card:focus,
.piece-card:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 .25rem rgba(13,110,253,.25), 0 .25rem .75rem rgba(0,0,0,.08);
}

/* 下部から“詳細を見る”オーバーレイ（hoverのみ出現） */
@media (hover: hover) {
  .piece-card {
    overflow: hidden;
    border-radius: .5rem; /* 角丸を少し強調（任意） */
  }
  .piece-card::after {
    content: "詳細を見る";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    transform: translateY(100%);
    padding: .5rem .75rem;
    text-align: center;
    font-size: .875rem;
    color: #ffffff;
    background: rgba(13,110,253,1.06);
    transition: transform .18s ease;
  }
  .piece-card:hover::after {
    transform: translateY(0);
  }
}

/* 動きが苦手なユーザー配慮 */
@media (prefers-reduced-motion: reduce) {
  .piece-card,
  .piece-card::after {
    transition: none !important;
  }
}
.piece-card {
  opacity: 0;
  transform: translateY(6px);
}
.piece-card.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity .22s ease, transform .22s ease, box-shadow .18s ease, border-color .18s ease;
}