body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #faf8ef;
}

h1 {
    margin-top: 20px;
    color: #776e65;
}

#game-container {
    width: 400px;
    margin: 20px auto;
}

#grid-container {
    display: grid;
    grid-template-columns: repeat(4, 90px);
    grid-template-rows: repeat(4, 90px);
    gap: 10px;
    background: #bbada0;
    padding: 10px;
    border-radius: 10px;
}

.cell {
    width: 90px;
    height: 90px;
    background: #cdc1b4;
    border-radius: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 36px;
    font-weight: bold;
    color: #776e65;
    transition: 0.2s;
}

.cell[data-value="2"] { background: #eee4da; }
.cell[data-value="4"] { background: #ede0c8; }
.cell[data-value="8"] { background: #f2b179; color: #f9f6f2; }
.cell[data-value="16"] { background: #f59563; color: #f9f6f2; }
.cell[data-value="32"] { background: #f67c5f; color: #f9f6f2; }
.cell[data-value="64"] { background: #f65e3b; color: #f9f6f2; }
.cell[data-value="128"] { background: #edcf72; color: #f9f6f2; font-size:28px; }
.cell[data-value="256"] { background: #edcc61; color: #f9f6f2; font-size:28px; }
.cell[data-value="512"] { background: #edc850; color: #f9f6f2; font-size:28px; }
.cell[data-value="1024"] { background: #edc53f; color: #f9f6f2; font-size:24px; }
.cell[data-value="2048"] { background: #edc22e; color: #f9f6f2; font-size:24px; }