/* 平方之泉頁面樣式 */
body.spring-page {
    background-image: url('guardian.jpg');
}

.spring-container {
    background-color: rgba(0, 0, 0, 0.7);
    border: 3px solid rgba(255, 140, 0, 0.7);
    border-radius: 10px;
    padding: 30px;
    width: 90%;
    max-width: 800px;
    margin: 0 auto;
    color: white;
}

.spring-title {
    color: rgba(255, 165, 0, 0.9);
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.spring-content {
    line-height: 1.8;
    font-size: 1.1rem;
    margin-bottom: 30px;
    text-align: justify;
}

.spring-content p {
    margin-bottom: 15px;
}

.start-challenge-container {
    text-align: center;
    margin-top: 30px;
}

/* 問答區域樣式 */
.quiz-container {
    padding: 20px;
    margin-bottom: 30px;
}

#question-container {
    margin-bottom: 30px;
}

#question-text {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: rgba(255, 165, 0, 0.9);
    text-align: center;
}

#options-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.option-btn {
    padding: 15px;
    background-color: rgba(255, 140, 0, 0.6);
    color: white;
    border: 2px solid rgba(255, 165, 0, 0.8);
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.option-btn:hover {
    background-color: rgba(255, 165, 0, 0.8);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 140, 0, 0.4);
}

.option-btn.correct {
    background-color: rgba(0, 200, 0, 0.8);
    border-color: rgba(0, 255, 0, 0.8);
}

.option-btn.incorrect {
    background-color: rgba(200, 0, 0, 0.8);
    border-color: rgba(255, 0, 0, 0.8);
}

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

/* 泉水動畫區域 */
.spring-animation {
    height: 150px;
    margin: 30px 0;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    background-color: rgba(0, 100, 255, 0.3);
}

.water-ripple {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(0, 200, 255, 0.6);
    opacity: 0;
}

.water-ripple.animate {
    animation: ripple 2s ease-out;
}

@keyframes ripple {
    0% {
        width: 0;
        height: 0;
        opacity: 0.8;
    }
    100% {
        width: 300px;
        height: 300px;
        opacity: 0;
    }
}

/* 進度條樣式 */
.progress-container {
    margin-top: 20px;
}

.progress-text {
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.progress-bar {
    height: 15px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    background-color: rgba(255, 165, 0, 0.8);
    width: 0%;
    transition: width 0.5s ease;
}

/* 完成訊息樣式 */
.completion-message {
    text-align: center;
    padding: 20px;
}

.completion-message h2 {
    color: rgba(255, 215, 0, 0.9);
    font-size: 1.8rem;
    margin-bottom: 20px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.completion-message p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.feedback-container {
    text-align: center;
    margin: 20px 0;
    font-size: 1.2rem;
    min-height: 30px;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .spring-title {
        font-size: 1.8rem;
    }
    
    #options-container {
        grid-template-columns: 1fr;
    }
    
    .option-btn {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .spring-container {
        padding: 15px;
    }
    
    .spring-title {
        font-size: 1.5rem;
    }
    
    .spring-content {
        font-size: 1rem;
    }
    
    #question-text {
        font-size: 1.3rem;
    }
}