/* 脳トレ共通: スポンサーリンク（common/sponsor.js が出力する要素の見た目）。クラスはすべて bt- で始める */
.bt-zone { text-align: center; }
.bt-zone--start { margin-top: 8px; }
.bt-zone--result { margin-top: 48px; } /* 操作ボタンから35px以上離す */

.bt-sponsor { margin: 0; text-align: left; }
.bt-sponsor__label { display: block; margin-bottom: 4px; font-size: 12px; line-height: 1.5; color: #5c6670; text-align: center; }
.bt-sponsor a.bt-amazon {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; box-sizing: border-box;
  color: #212529; text-decoration: none; background: #fff; border: 1px solid #dee2e6; border-radius: 12px;
  touch-action: manipulation;
}
.bt-sponsor a.bt-amazon:hover { border-color: #ff9900; }
.bt-sponsor a.bt-amazon:focus-visible { outline: 3px solid #ffd43b; outline-offset: 2px; }
.bt-amazon__img { flex: none; width: 64px; height: 64px; object-fit: contain; border-radius: 8px; background: #fff; }
.bt-amazon__pr { flex: none; padding: 1px 6px; font-size: 11px; font-weight: 700; color: #5c6670; border: 1px solid #dee2e6; border-radius: 4px; }
.bt-amazon__body { display: flex; flex-direction: column; min-width: 0; }
.bt-amazon__name { font-size: 15px; font-weight: 700; line-height: 1.4; }
.bt-amazon__desc { font-size: 13px; line-height: 1.4; color: #495057; }
.bt-amazon__cta { font-size: 13px; font-weight: 700; color: #c45500; }
.bt-amazon__note { margin: 4px 0 0; font-size: 11px; line-height: 1.5; color: #5c6670; text-align: left; }
.bt-ad-slot { display: flex; align-items: center; justify-content: center; max-width: 100%; min-height: 100px; margin-top: 20px; overflow: hidden; }