body {
    font-family: 'Mochiy Pop One', sans-serif;
    background-color: #f0f8ff;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    text-align: center;
}

.container {
    background-color: #fff;
    padding: 20px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 600px;
}

h1 {
    color: #ff6347;
    font-size: 2.5rem;
    margin-bottom: 20px;
}

#start-button {
    background-color: #ff6347;
    color: white;
    padding: 20px 40px;
    border: none;
    border-radius: 15px;
    font-size: 2rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    font-family: 'Mochiy Pop One', sans-serif;
    margin-top: 30px;
}

#start-button:hover {
    background-color: #e5533d;
    transform: translateY(-5px);
}

#game-info-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 1.2rem;
    color: #007bff;
}

#score-display {
    background-color: #007bff;
    color: #fff;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 1rem;
}

#timer {
    background-color: #ffc107;
    color: #fff;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 1rem;
}

#question {
    font-size: 2rem;
    margin-bottom: 30px;
    padding: 20px;
    background-color: #e7f3fe;
    border-radius: 10px;
}

.options-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.option {
    background-color: #007bff;
    color: white;
    padding: 20px;
    border: none;
    border-radius: 15px;
    font-size: 1.8rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    font-family: 'Mochiy Pop One', sans-serif;
}

.option:hover {
    background-color: #0056b3;
    transform: translateY(-5px);
}

.option.correct {
    background-color: #28a745;
}

.option.incorrect {
    background-color: #dc3545;
}

.option:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

#result-container {
    padding: 30px;
}

#final-score {
    font-size: 4rem;
    color: #ff6347;
    margin: 20px 0;
}

#restart-button {
    background-color: #28a745;
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background-color 0.3s;
    font-family: 'Mochiy Pop One', sans-serif;
}

#restart-button:hover {
    background-color: #218838;
}

.hidden {
    display: none;
}

/* スマートフォン向けのスタイル */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    h1 {
        font-size: 2rem;
    }
    #question {
        font-size: 1.5rem;
    }
    .option {
        font-size: 1.5rem;
        padding: 15px;
    }
    #game-info-container {
        font-size: 1rem;
    }
    #timer, #score-display {
        padding: 6px 12px;
    }
    #final-score {
        font-size: 3rem;
    }
    #restart-button {
        font-size: 1.2rem;
    }
}