body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: #1a1a2e;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#game-container {
    background-color: #16213e;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 600px;
    max-width: 90%;
    text-align: center;
}

h1 {
    color: #e94560;
    margin-bottom: 20px;
    font-size: 2.5em;
    /* 文字を大きく */
}

#enemy-area {
    background-color: #0f3460;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

#enemy-name {
    margin-top: 0;
    color: #fca311;
    font-size: 1.8em;
    /* 文字を大きく */
}

#enemy-hp-bar {
    width: 100%;
    height: 20px;
    background-color: #333;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

#enemy-hp-fill {
    height: 100%;
    background-color: #e94560;
    transition: width 0.3s ease;
}

#enemy-argument {
    font-size: 1.5em;
    /* 文字を大きく */
    font-weight: bold;
    font-style: italic;
    margin: 20px 0;
}

#player-area h3 {
    font-size: 1.5em;
    /* 文字を大きく */
}

#player-input {
    width: 60%;
    padding: 15px;
    margin-right: 10px;
    border: 2px solid #0f3460;
    border-radius: 8px;
    font-size: 1.2em;
    /* 文字を大きく */
    background-color: #f0f0f0;
    color: #333;
    outline: none;
}

#submit-btn {
    padding: 15px 25px;
    background-color: #e94560;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.2em;
    /* 文字を大きく */
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

#submit-btn:hover {
    background-color: #d13d56;
    transform: scale(1.02);
}

#submit-btn:active {
    transform: scale(0.98);
}

#submit-btn:disabled {
    background-color: #777;
    cursor: not-allowed;
    transform: none;
}

#choices-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

#feedback-message {
    font-size: 1.5em;
    /* 文字を大きく */
    font-weight: bold;
    margin-top: 20px;
    min-height: 1.5em;
}

.correct {
    color: #4caf50;
}

.incorrect {
    color: #f44336;
}