body {
  background: linear-gradient(120deg, #f7971e 0%, #ffd200 100%);
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  text-align: center;
}
h1 {
  color: #f7971e;
  margin-top: 32px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.game-board {
  display: grid;
  grid-template-columns: repeat(3, 80px);
  grid-template-rows: repeat(3, 80px);
  gap: 8px;
  justify-content: center;
  margin: 0 auto 18px auto;
  max-width: 260px;
}
.cell {
  background: #fffbe7;
  border: 2px solid #f7971e;
  border-radius: 12px;
  width: 80px;
  height: 80px;
  font-size: 2.5em;
  font-weight: bold;
  color: #f7971e;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  user-select: none;
}
.cell.winner {
  background: #ffd200;
}
.status {
  font-size: 1.2em;
  color: #444;
  margin-bottom: 12px;
  min-height: 1.5em;
}
button {
  background: #f7971e;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 28px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s;
}
button:hover {
  background: #ffd200;
  color: #333;
}
@media (max-width: 500px) {
  .game-board { grid-template-columns: repeat(3, 22vw); grid-template-rows: repeat(3, 22vw); gap: 3vw; max-width: 98vw; }
  .cell { width: 22vw; height: 22vw; font-size: 8vw; }
}