.g2048-wrap{
  max-width:460px;
}

.g2048-board-wrap{
  margin:36px auto 0;
  max-width:380px;
  touch-action:none;
}

.g2048-board{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  grid-template-rows:repeat(4, 1fr);
  gap:10px;
  aspect-ratio:1/1;
  background:rgba(63,242,255,0.05);
  border:1px solid rgba(63,242,255,0.2);
  border-radius:6px;
  padding:10px;
}

.g2048-cell{
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:4px;
  background:rgba(255,255,255,0.03);
  font-family:'Orbitron',sans-serif;
  font-weight:700;
  font-size:clamp(16px,5vw,26px);
  color:#fff;
  transition:background .15s ease, color .15s ease, box-shadow .15s ease;
}
.g2048-cell.pop{
  animation:tilePop .15s ease;
}
@keyframes tilePop{
  0%{transform:scale(0.75);}
  100%{transform:scale(1);}
}

.g2048-cell[data-v="2"]{background:rgba(63,242,255,0.10);color:#cdeffb;}
.g2048-cell[data-v="4"]{background:rgba(63,242,255,0.18);color:#e6f7ff;}
.g2048-cell[data-v="8"]{background:rgba(63,242,255,0.28);color:#fff;box-shadow:0 0 12px rgba(63,242,255,0.25);}
.g2048-cell[data-v="16"]{background:rgba(77,255,160,0.22);color:#fff;box-shadow:0 0 12px rgba(77,255,160,0.3);}
.g2048-cell[data-v="32"]{background:rgba(77,255,160,0.32);color:#fff;box-shadow:0 0 14px rgba(77,255,160,0.4);}
.g2048-cell[data-v="64"]{background:rgba(255,210,63,0.28);color:#fff;box-shadow:0 0 14px rgba(255,210,63,0.4);}
.g2048-cell[data-v="128"]{background:rgba(255,210,63,0.4);color:#fff;box-shadow:0 0 16px rgba(255,210,63,0.5);font-size:clamp(14px,4.4vw,22px);}
.g2048-cell[data-v="256"]{background:rgba(192,77,255,0.32);color:#fff;box-shadow:0 0 16px rgba(192,77,255,0.5);font-size:clamp(14px,4.4vw,22px);}
.g2048-cell[data-v="512"]{background:rgba(192,77,255,0.45);color:#fff;box-shadow:0 0 18px rgba(192,77,255,0.6);font-size:clamp(14px,4.4vw,22px);}
.g2048-cell[data-v="1024"]{background:rgba(255,95,126,0.35);color:#fff;box-shadow:0 0 18px rgba(255,95,126,0.55);font-size:clamp(12px,4vw,19px);}
.g2048-cell[data-v="2048"]{background:var(--cyan);color:#04141a;box-shadow:0 0 26px rgba(63,242,255,0.85);font-size:clamp(12px,4vw,19px);}

.restart-btn{
  margin:34px auto 0;
}