.grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    padding: 20px;
}

.box {
    width: 100%;
    padding-top: 100%;
    position: relative;
    background-color: #ccc;
    border-radius: 5px;
    cursor: pointer;
    user-select: none;
}

.box span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: bold;
    color: #fff;
}

.box.correct {
    background-color: #4caf50 !important;
}

.box.incorrect {
    background-color: #f44336 !important;
    animation: shake 0.3s;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    50% {
        transform: translateX(5px);
    }
    75% {
        transform: translateX(-5px);
    }
}

.info {
    margin: 20px 0;
}

.info span {
    display: block;
    font-size: 1.2rem;
    margin: 5px 0;
}

button {
    padding: 10px 20px;
    font-size: 1rem;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}


#startButton,
#countdown,
#playAgainButton {
    display: block;
    margin: 0 auto;
    margin-top: 10px;
}

#timer,
#countdown,
#score {
    display: none;
    text-align: center;
    font-size: 2rem;
    margin-top: 10px;
}