/* Quiz Kiến Thức Về Tết - Sắp Tết 2026 */

.tet-quiz-container {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: 20px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
    border: 2px solid #bfdbfe;
}

.tet-quiz-container h3 {
    color: #1d4ed8;
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    text-align: center;
    font-weight: 700;
}

.quiz-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
    font-size: 1rem;
}

/* Progress Bar */
.quiz-progress {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: #e5e7eb;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 6px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    color: #374151;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Quiz Content */
.quiz-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.question-container h4 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    line-height: 1.5;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.option-item:hover {
    border-color: #3b82f6;
    background: #eff6ff;
    transform: translateX(5px);
}

.option-item.selected {
    border-color: #3b82f6;
    background: #dbeafe;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.option-item input[type="radio"] {
    margin-right: 1rem;
    transform: scale(1.2);
    accent-color: #3b82f6;
}

.option-text {
    font-size: 1rem;
    color: #374151;
    font-weight: 500;
    flex: 1;
}

/* Quiz Actions */
.quiz-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quiz-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.prev-btn {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    color: white;
}

.prev-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(107, 114, 128, 0.3);
}

.next-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
}

.next-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}

.submit-btn {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    color: white;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(5, 150, 105, 0.3);
}

/* Results */
.quiz-results {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.results-container h4 {
    color: #1f2937;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.score-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.score-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.score-number {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.score-percentage {
    font-size: 1rem;
    font-weight: 600;
}

.grade-badge {
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
}

.grade-badge.xuất-sắc {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.grade-badge.giỏi {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.grade-badge.khá {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.grade-badge.trung-bình {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.grade-badge.cần-cải-thiện {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.result-message {
    text-align: center;
    color: #374151;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: #f3f4f6;
    border-radius: 10px;
    font-weight: 500;
}

/* Answers Review */
.answers-review {
    margin-bottom: 2rem;
}

.answers-review h5 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.answer-item {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.answer-item.correct {
    background: #f0fdf4;
    border-left-color: #10b981;
}

.answer-item.incorrect {
    background: #fef2f2;
    border-left-color: #ef4444;
}

.answer-item h6 {
    color: #1f2937;
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.answer-item p {
    margin: 0.25rem 0;
    font-size: 0.9rem;
    color: #6b7280;
}

.answer-item .explanation {
    color: #059669;
    font-weight: 500;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid #d1fae5;
}

/* Share Results */
.share-results {
    text-align: center;
    padding-top: 1rem;
    border-top: 2px solid #e5e7eb;
}

.share-results h5 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.share-btn,
.retry-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    margin: 0 0.5rem;
}

.share-btn {
    background: linear-gradient(135deg, #1877f2 0%, #166fe5 100%);
    color: white;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(24, 119, 242, 0.3);
}

.retry-btn {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    color: white;
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(107, 114, 128, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .tet-quiz-container {
        padding: 1.5rem;
        margin: 1rem 0;
    }

    .quiz-content {
        padding: 1.5rem;
    }

    .quiz-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .quiz-btn {
        width: 100%;
    }

    .score-display {
        flex-direction: column;
        gap: 1rem;
    }

    .option-item {
        padding: 0.75rem;
    }

    .option-text {
        font-size: 0.9rem;
    }

    .share-btn,
    .retry-btn {
        width: 100%;
        margin: 0.25rem 0;
    }
}

@media (max-width: 480px) {
    .tet-quiz-container h3 {
        font-size: 1.5rem;
    }

    .quiz-subtitle {
        font-size: 0.9rem;
    }

    .question-container h4 {
        font-size: 1.1rem;
    }

    .score-circle {
        width: 100px;
        height: 100px;
    }

    .score-number {
        font-size: 1.2rem;
    }

    .score-percentage {
        font-size: 0.9rem;
    }

    .grade-badge {
        font-size: 1rem;
        padding: 0.5rem 1rem;
    }
}

/* Animation */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tet-quiz-container {
    animation: slideIn 0.6s ease-out;
}

.option-item {
    animation: slideIn 0.4s ease-out;
}

.answer-item {
    animation: slideIn 0.3s ease-out;
}

/* Focus States */
.option-item:focus-within {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.quiz-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}