* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #faf8ef;
    display: flex;
    flex-direction: column; /* Ensure items stack vertically */
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    width: 400px;
    text-align: center;
}

.title {
    font-size: 80px;
    font-weight: bold;
    color: #776e65;
    margin: 0 auto;
}

.score-container {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    margin: 20px 0;
}

.score-box {
    background-color: #bbada0;
    padding: 10px 20px;
    border-radius: 3px;
    color: white;
}

.score-title {
    font-size: 16px;
}

.score-number {
    font-size: 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
    background-color: #bbada0;
    padding: 10px;
    border-radius: 6px;
}

.grid-cell {
    width: 90px;
    height: 90px;
    background-color: rgba(238, 228, 218, 0.35);
    border-radius: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 45px;
    font-weight: bold;
    color: #776e65;
}

.number-2 {
    background-color: #eee4da;
}

.number-4 {
    background-color: #ede0c8;
}

.number-8 {
    background-color: #f2b179;
    color: white;
}

.number-16 {
    background-color: #f59563;
    color: white;
}

.number-32 {
    background-color: #f67c5f;
    color: white;
}

.number-64 {
    background-color: #f65e3b;
    color: white;
}

.number-128 {
    background-color: #edcf72;
    color: white;
    font-size: 35px;
}

.number-256 {
    background-color: #edcc61;
    color: white;
    font-size: 35px;
}

.number-512 {
    background-color: #edc850;
    color: white;
    font-size: 35px;
}

.number-1024 {
    background-color: #edc53f;
    color: white;
    font-size: 30px;
}

.number-2048 {
    background-color: #edc22e;
    color: white;
    font-size: 30px;
}

.game-over {
    position: absolute;
    width: 400px;
    height: 400px;
    background-color: rgba(238, 228, 218, 0.73);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 60px;
    font-weight: bold;
    color: #776e65;
    display: none;
}

.btn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background-color: #8f7a66;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 18px;
}

.btn:hover {
    background-color: #9f8a76;
}