.memory-wrapper{
  max-width:420px;margin:20px auto;padding:20px;
  background:#020617;color:#fff;
  border-radius:16px;text-align:center;
  font-family:Arial,sans-serif;
}
.memory-board{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin:15px 0;
}
.card{
  background:#1e293b;
  height:70px;
  border-radius:10px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.6rem;
  user-select:none;
}
.card.flipped{
  background:#22c55e;
  color:#000;
}
button{
  padding:8px 18px;
  border:none;
  border-radius:10px;
  background:#facc15;
  font-weight:bold;
  cursor:pointer;
}
#gameComplete{
  margin-top:10px;
  color:#4ade80;
  font-weight:bold;
}