.so-board {
  display: grid;
  grid-template-columns: repeat(var(--so-cols, 8), 1fr);
  gap: 2px;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  background: rgba(0, 0, 0, 0.25);
  padding: 6px;
  border-radius: 12px;
}
.so-cell {
  aspect-ratio: 1 / 1;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: clamp(0.7rem, 2.6vw, 1.2rem);
  color: #eaf6ff;
}
.so-wall { background: #2a3654; }
.so-target { background: rgba(126, 242, 155, 0.14); box-shadow: inset 0 0 0 2px rgba(126, 242, 155, 0.4); }
.so-box { background: linear-gradient(160deg, #ffd59e, #e07b2c); color: #3a1e08; border-radius: 6px; }
.so-box--on { background: linear-gradient(160deg, #7ef29b, #34a35a); }
.so-player { color: #4fdfff; }
.so-dpad {
  display: grid;
  grid-template-columns: repeat(3, 46px);
  grid-template-rows: repeat(3, 46px);
  gap: 0.3rem;
  justify-content: center;
  margin: 0.6rem auto 0;
}
.so-dpad button {
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: #d9ebff;
  font-size: 1.1rem;
  cursor: pointer;
}
.so-dpad__up { grid-area: 1 / 2; }
.so-dpad__left { grid-area: 2 / 1; }
.so-dpad__right { grid-area: 2 / 3; }
.so-dpad__down { grid-area: 3 / 2; }