body { gap: 24px; }
#board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  background: var(--surface);
  padding: 10px;
  border-radius: 14px;
  box-shadow: 0 10px 40px var(--shadow);
}
.cell {
  width: 100px;
  height: 100px;
  background: var(--cell-blue);
  border: none;
  border-radius: 10px;
  font-size: 3.2rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
  line-height: 1;
}
.cell:hover:not(.taken) { background: var(--cell-blue-hover); }
.cell:active:not(.taken) { transform: scale(0.95); }
.cell.x { color: var(--red); }
.cell.o { color: var(--green); }
.cell.taken { cursor: default; }
.cell.win { background: var(--accent); color: var(--accent-text); }
#score {
  display: flex;
  gap: 30px;
  font-size: 1rem;
}
#score span { font-weight: 700; }
.sx { color: var(--red); }
.so { color: var(--green); }