#sannmoku-wrapper{
  background:#f6f3ea;
  padding:20px;
  border-radius:30px;
  font-family:"Hiragino Mincho ProN","Yu Mincho",serif;
  box-shadow:0 15px 40px rgba(0,0,0,0.15);

  max-width:330px;
  width:100%;
  margin:40px auto;

  
}
#controls{margin-bottom:25px;text-align:center}
#controls button{
  background:linear-gradient(145deg,#3f5f4a,#2e4738);
  color:#fff;border:none;padding:10px 22px;
  margin:0 8px;font-size:16px;border-radius:30px;
  cursor:pointer;letter-spacing:1px;
}
#board{
  width:min(75vw,330px);
  height:min(75vw,330px);
  margin:0 auto;padding:15px;
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:12px;background:linear-gradient(135deg,#d9cbb6,#c7b49d);
  border-radius:25px;
  margin:0 auto; 
}
.cell{
  background:#fdfaf3;
  border-radius:20px;
  display:flex;
  align-items:center;
  justify-content:center;

  aspect-ratio:1 / 1;   /* ← これが重要 */
}
.cell img{
  width:75%;height:75%;object-fit:contain;
  animation:fadeIn 0.3s ease forwards;
 border-radius:18px;
}
@keyframes fadeIn{
  from{opacity:0;transform:scale(0.8);}
  to{opacity:1;transform:scale(1);}
}
#result{
  margin-top:25px;font-size:20px;
  color:#3f5f4a;letter-spacing:1px;text-align:center;
}