body, html {
    font-family: 'avenir', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #ffffff;
}
.container {
    text-align: center;
}
h1 {
    color: #333;
    font-size: 1.5em;
}
.grid {
    display: grid;
    grid-template-columns: repeat(4, 60px);
    grid-template-rows: repeat(4, 60px);
    gap: 6px;
    background-color: #FFE2B5;
    padding: 12px;
    border-radius: 10px;
}
.cell {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #eee;
    color: #333;
    border-radius: 3px;
    font-weight: bold;
}
.tile-2 { background-color: #eee4da; color: #776e65; }
.tile-4 { background-color: #ede0c8; color: #f9f6f2; }
.tile-8 { background-color: #f2b179; color: #f9f6f2; }
.tile-16 { background-color: #f59563; color: #f9f6f2; }
.tile-32 { background-color: #f67c5f; color: #f9f6f2; }
.tile-64 { background-color: #f65e3b; color: #f9f6f2; }
.tile-128 { background-color: #edcf72; color: #f9f6f2; }
.tile-256 { background-color: #edcc61; color: #f9f6f2; }
.tile-512 { background-color: #edc850; color: #f9f6f2; }
.tile-1024 { background-color: #edc53f; color: #f9f6f2; }
.tile-2048 { background-color: #edc22e; color: #f9f6f2; }
.button-container {
    margin-top: 20px;
}
button {
    background-color: #f57c00;
    color: white;
    font-size: 10px;
    font-family: 'avenir', sans-serif;
    margin: 3px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}
button:hover {
    background-color: #fb8c00;
    transform: scale(1.05);
}