body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
  text-align: center;
}

header {
  background: #222;
  color: white;
  padding: 15px;
}

nav a {
  margin: 0 10px;
  color: white;
  text-decoration: none;
}

.hero {
  padding: 50px;
}

.btn {
  background: #007bff;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}

.game-wrapper {
  padding: 40px;
}

#game {
  display: grid;
  grid-template-columns: repeat(4, 80px);
  gap: 10px;
  justify-content: center;
  margin-top: 20px;
}

.cell {
  width: 80px;
  height: 80px;
  background: #cdc1b4;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-weight: bold;
  border-radius: 5px;
  transition: 0.2s;
}

/* разные цвета плиток */
.cell[data-value="2"] { background: #eee4da; }
.cell[data-value="4"] { background: #ede0c8; }
.cell[data-value="8"] { background: #f2b179; color: white; }
.cell[data-value="16"] { background: #f59563; color: white; }
.cell[data-value="32"] { background: #f67c5f; color: white; }
.cell[data-value="64"] { background: #f65e3b; color: white; }

button {
  margin-top: 20px;
  padding: 10px 20px;
}

footer {
  margin-top: 40px;
  padding: 20px;
  background: #222;
  color: white;
}