body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
    padding-top: 30px;
    overflow-y: hidden;
}

.container {
    text-align: center;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(5, 130px);
    grid-template-rows: repeat(5, 130px);
    gap: 10px;
    justify-content: center;
}

.card {
    width: 130px;
    height: 130px;
    background-color: #007BFF;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.9rem;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

.card.flipped {
    background-color: #28a745;
    pointer-events: none;
}

.card.matched {
    background-color: #ffc107;
    pointer-events: none;
}