body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.game-container {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    width: 320px;
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.card {
    background-color: #2196F3;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 70px;
    font-size: 24px;
    color: white;
    position: relative;
    transform: scale(1);
    transition: transform 0.2s;
}

.card.flipped {
    background-color: #fff;
    color: #2196F3;
}

.card.flipped::before {
    content: attr(data-icon);
    font-size: 36px;
    position: absolute;
    color: #2196F3;
}

.card.matched {
    background-color: #4CAF50;
    color: white;
    cursor: default;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

button {
    padding: 10px 15px;
    font-size: 14px;
    background-color: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}