/* Quiz Styles */
:root {
    --quiz-primary: #4a6fa5;
    --quiz-secondary: #166088;
    --quiz-accent: #4fc3f7;
    --quiz-correct: #4caf50;
    --quiz-incorrect: #f44336;
    --quiz-neutral: #f5f5f5;
    --quiz-text: #333;
    --quiz-light-text: #f8f9fa;
    --quiz-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --quiz-transition: all 0.3s ease;
    --quiz-border-radius: 12px;
    --quiz-gradient-start: #5c6bc0;
    --quiz-gradient-end: #26c6da;
}

/* Quiz Container */
.quiz-container {
    max-width: 1000px;
    margin: 8rem auto 5rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.8));
    border-radius: var(--quiz-border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    min-height: 500px;
}

/* Quiz Sections */
.quiz-section {
    display: none;
}

.quiz-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Quiz Header */
.quiz-header {
    text-align: center;
    margin-bottom: 2rem;
}

.quiz-header h2 {
    color: var(--quiz-primary);
    font-size: 2.2rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--quiz-gradient-start), var(--quiz-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quiz-header p {
    color: #666;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Quiz Navigation */
.quiz-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.back-button {
    background: none;
    border: none;
    color: var(--quiz-primary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    transition: var(--quiz-transition);
}

.back-button:hover {
    color: var(--quiz-accent);
}

.quiz-progress, .quiz-score {
    font-weight: 500;
    color: var(--quiz-primary);
}

/* Quiz Type Selection */
.quiz-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.quiz-type-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--quiz-border-radius);
    box-shadow: var(--quiz-shadow);
    text-align: center;
    cursor: pointer;
    transition: var(--quiz-transition);
    border-top: 4px solid transparent;
    border-image: linear-gradient(to right, var(--quiz-gradient-start), var(--quiz-gradient-end));
    border-image-slice: 1;
}

.quiz-type-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.quiz-type-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--quiz-accent);
    background: linear-gradient(to right, var(--quiz-gradient-start), var(--quiz-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quiz-type-card h3 {
    color: var(--quiz-primary);
    margin-bottom: 1rem;
}

/* Quiz Mode Selection */
.quiz-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.quiz-mode-card {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: var(--quiz-border-radius);
    box-shadow: var(--quiz-shadow);
    text-align: center;
    cursor: pointer;
    transition: var(--quiz-transition);
}

.quiz-mode-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    background: linear-gradient(135deg, rgba(92, 107, 192, 0.05), rgba(38, 198, 218, 0.05));
}

.quiz-mode-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--quiz-accent);
}

.quiz-mode-card h3 {
    color: var(--quiz-primary);
    margin-bottom: 0.5rem;
}

.quiz-mode-card p {
    font-size: 0.9rem;
    color: #666;
}

/* Question Card */
.question-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--quiz-border-radius);
    box-shadow: var(--quiz-shadow);
    margin-bottom: 2rem;
}

.question-text {
    margin-bottom: 2rem;
}

.question-text h3 {
    font-size: 1.8rem;
    color: var(--quiz-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.usage-text {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: #f9f9f9;
    border-radius: 6px;
    border-left: 4px solid var(--quiz-accent);
}

/* Answer Options */
.answer-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.answer-option {
    padding: 1rem;
    background-color: #f5f5f5;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--quiz-transition);
    border: 2px solid transparent;
    font-size: 1.1rem;
}

.answer-option:hover {
    background-color: #eef2f7;
}

.answer-option.selected {
    background-color: rgba(79, 195, 247, 0.2);
    border-color: var(--quiz-accent);
}

.answer-option.correct {
    background-color: rgba(76, 175, 80, 0.2);
    border-color: var(--quiz-correct);
}

.answer-option.incorrect {
    background-color: rgba(244, 67, 54, 0.2);
    border-color: var(--quiz-incorrect);
}

/* Feedback Container */
.feedback-container {
    display: none;
    margin-bottom: 2rem;
}

.feedback-container.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.feedback-card {
    display: none;
    padding: 1.5rem;
    border-radius: var(--quiz-border-radius);
    background-color: #fff;
    box-shadow: var(--quiz-shadow);
    text-align: center;
}

.feedback-card.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.feedback-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feedback-icon.correct {
    color: var(--quiz-correct);
}

.feedback-icon.incorrect {
    color: var(--quiz-incorrect);
}

/* Examples Container */
.examples-container {
    display: none;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: var(--quiz-border-radius);
    box-shadow: var(--quiz-shadow);
}

.examples-container.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.examples-container h3 {
    color: var(--quiz-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.example-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
}

.example-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.example-japanese {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.example-reading {
    font-size: 1rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.example-english {
    font-size: 1rem;
    color: #444;
}

/* Quiz Actions */
.quiz-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.quiz-btn {
    min-width: 150px;
    background: linear-gradient(to right, var(--quiz-accent), #2196f3);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--quiz-transition);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.quiz-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
    background: linear-gradient(to right, #2196f3, var(--quiz-accent));
}

.quiz-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Results Section */
.results-header {
    text-align: center;
    margin-bottom: 2rem;
}

.results-content {
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--quiz-border-radius);
    box-shadow: var(--quiz-shadow);
}

.results-summary {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.results-score {
    margin-bottom: 1.5rem;
}

.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--quiz-gradient-start), var(--quiz-gradient-end));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.results-details {
    margin-bottom: 2rem;
}

.results-details h3 {
    color: var(--quiz-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.question-summary {
    display: grid;
    gap: 1rem;
}

.summary-item {
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.summary-item.correct {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--quiz-correct);
}

.summary-item.incorrect {
    background-color: rgba(244, 67, 54, 0.1);
    border-left: 4px solid var(--quiz-incorrect);
}

.summary-icon {
    font-size: 1.5rem;
}

.summary-icon.correct {
    color: var(--quiz-correct);
}

.summary-icon.incorrect {
    color: var(--quiz-incorrect);
}

.summary-text {
    flex: 1;
}

.summary-question {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.summary-answer {
    font-size: 0.9rem;
    color: #666;
}

.results-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .quiz-container {
        padding: 1.5rem;
        margin: 6rem auto 3rem;
    }
    
    .quiz-header h2 {
        font-size: 1.8rem;
    }
    
    .quiz-types, .quiz-modes {
        grid-template-columns: 1fr;
    }
    
    .question-text h3 {
        font-size: 1.5rem;
    }
    
    .quiz-actions {
        flex-direction: column;
    }
    
    .quiz-btn {
        width: 100%;
    }
    
    .score-circle {
        width: 120px;
        height: 120px;
        font-size: 2rem;
    }
}