/* Quiz Styles */
.quiz-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.quiz-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

.quiz-header h1 {
    margin: 0 0 10px 0;
    font-size: 2rem;
}

.quiz-header .back-link {
    color: white;
    text-decoration: none;
    display: inline-block;
    margin-top: 10px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.quiz-header .back-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Controls Panel */
.controls-panel {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.controls-panel h2 {
    color: #333;
    margin-bottom: 20px;
}

.lesson-selector {
    margin-bottom: 25px;
}

.lesson-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 10px;
    margin: 15px 0;
}

.lesson-checkbox {
    display: flex;
    align-items: center;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lesson-checkbox:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.lesson-checkbox input[type="checkbox"] {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.lesson-checkbox span {
    font-size: 0.9rem;
    color: #333;
}

.selector-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.selector-buttons button {
    padding: 8px 20px;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#select-all-btn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

#deselect-all-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.selector-buttons button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Quiz Settings */
.quiz-settings {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.quiz-settings label {
    font-weight: 600;
    color: #333;
}

.quiz-settings select {
    padding: 10px 20px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-settings select:hover {
    border-color: #667eea;
}

.quiz-settings select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Start Button */
#start-quiz-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(17, 153, 142, 0.3);
}

#start-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(17, 153, 142, 0.4);
}

/* Quiz Area */
#quiz-area {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Progress Bar */
.progress-section {
    margin-bottom: 25px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #666;
}

.progress-bar-container {
    width: 100%;
    height: 10px;
    background: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

/* Question Section */
.question-section {
    text-align: center;
    margin-bottom: 30px;
}

.question-section h3 {
    color: #333;
    font-size: 1rem;
    margin-bottom: 20px;
}

#question-word {
    font-size: 2.5rem;
    font-weight: bold;
    color: #667eea;
    margin: 20px 0;
    padding: 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 15px;
}

.question-prompt {
    font-size: 1.1rem;
    color: #666;
    margin-top: 20px;
}

/* Answer Choices */
#answer-choices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.answer-choice {
    padding: 20px;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
}

.answer-choice:hover:not(:disabled) {
    background: #f8f9fa;
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

.answer-choice.correct {
    background: linear-gradient(135deg, rgba(17, 153, 142, 0.1) 0%, rgba(56, 239, 125, 0.1) 100%);
    border-color: #11998e;
    border-width: 3px;
}

.answer-choice.incorrect {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    border-color: #f5576c;
    border-width: 3px;
}

/* Feedback */
.feedback {
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 1rem;
    text-align: center;
}

.feedback.correct-feedback {
    background: linear-gradient(135deg, rgba(17, 153, 142, 0.1) 0%, rgba(56, 239, 125, 0.1) 100%);
    border: 2px solid #11998e;
    color: #11998e;
}

.feedback.incorrect-feedback {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    border: 2px solid #f5576c;
    color: #f5576c;
}

.feedback em {
    display: block;
    margin-top: 10px;
    font-size: 0.95rem;
    color: #333;
}

/* Next Button */
#next-question-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

#next-question-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.4);
}

/* Results Area */
#results-area {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.results-card {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-radius: 15px;
    margin-bottom: 30px;
}

.percentage-circle {
    width: 150px;
    height: 150px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

.percentage-circle h2 {
    color: white;
    font-size: 3rem;
    margin: 0;
}

#final-score-text {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 15px;
}

#performance-text {
    font-size: 1.3rem;
    color: #333;
    font-weight: 600;
}

/* Results Buttons */
.results-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.results-buttons button {
    padding: 12px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

#review-btn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

#retake-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

#new-quiz-btn {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.results-buttons button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Review Section */
#review-section {
    margin-top: 20px;
}

#review-section h3 {
    color: #333;
    margin-bottom: 20px;
}

.review-item {
    display: grid;
    grid-template-columns: 40px 1fr 40px;
    gap: 15px;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 10px;
    border: 2px solid #e9ecef;
    background: white;
}

.review-item.correct {
    border-color: #11998e;
    background: linear-gradient(135deg, rgba(17, 153, 142, 0.05) 0%, rgba(56, 239, 125, 0.05) 100%);
}

.review-item.incorrect {
    border-color: #f5576c;
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.05) 0%, rgba(240, 147, 251, 0.05) 100%);
}

.review-number {
    width: 40px;
    height: 40px;
    background: #667eea;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.review-content h4 {
    color: #667eea;
    font-size: 1.3rem;
    margin: 0 0 10px 0;
}

.review-label {
    font-size: 0.85rem;
    color: #666;
    margin: 8px 0 4px 0;
    font-weight: 600;
}

.review-answer {
    margin: 0 0 8px 0;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #e9ecef;
}

.review-answer.wrong {
    border-left-color: #f5576c;
    color: #f5576c;
}

.review-answer.correct-answer {
    border-left-color: #11998e;
    color: #11998e;
}

.review-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.review-item.correct .review-icon {
    background: #11998e;
    color: white;
}

.review-item.incorrect .review-icon {
    background: #f5576c;
    color: white;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .quiz-container {
        padding: 10px;
    }

    .quiz-header h1 {
        font-size: 1.5rem;
    }

    .controls-panel,
    #quiz-area,
    #results-area {
        padding: 20px;
    }

    .lesson-checkboxes {
        grid-template-columns: 1fr;
    }

    #question-word {
        font-size: 2rem;
    }

    #answer-choices {
        grid-template-columns: 1fr;
    }

    .results-buttons {
        flex-direction: column;
    }

    .results-buttons button {
        width: 100%;
    }

    .review-item {
        grid-template-columns: 30px 1fr 30px;
        padding: 15px;
    }

    .review-number,
    .review-icon {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }

    .percentage-circle {
        width: 120px;
        height: 120px;
    }

    .percentage-circle h2 {
        font-size: 2.5rem;
    }
}