/* Quiz-specific styles */
.quiz-main {
    padding-top: 80px;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

/* Quiz Header */
.quiz-header {
    background: var(--bg-primary);
    padding: 2rem 0;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
}

.quiz-info h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.quiz-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.quiz-level-badge,
.quiz-questions-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.9rem;
}

.quiz-timer {
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 1rem;
    font-family: 'Monaco', 'Menlo', monospace;
    min-width: 80px;
    text-align: center;
}

.quiz-timer.timer-warning {
    background: #f97316;
    animation: pulse 1s ease-in-out infinite;
}

.quiz-timer.timer-critical {
    background: #ef4444;
    animation: shake 0.5s ease-in-out infinite;
}

/* Progress Bar */
.progress-container {
    max-width: 600px;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 0.5s ease;
    position: relative;
    width: 0%;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

.progress-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Quiz Section */
.quiz-section {
    padding: 3rem 0;
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Question Card */
.question-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.question-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.question-number {
    font-size: 1.1rem;
    font-weight: 600;
}

.question-content {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.question-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin: 0;
    text-align: center;
}

/* Answer Options */
.answer-options {
    padding: 1.5rem;
}

.answer-option {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.answer-option:last-child {
    margin-bottom: 0;
}

.answer-option:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(5px);
}

.answer-option.selected {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    box-shadow: var(--shadow-md);
}

.answer-option.selected::after {
    content: '✓';
    position: absolute;
    right: 1rem;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    margin-right: 1rem;
    flex-shrink: 0;
}

.answer-option.selected .option-letter {
    background: var(--secondary-color);
}

.option-text {
    flex: 1;
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Question Navigation */
.question-navigation {
    padding: 1.5rem;
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.navigation-info {
    text-align: center;
    flex: 1;
}

.keyboard-hint {
    font-size: 0.8rem;
    color: var(--text-light);
    font-style: italic;
}

/* Quiz Instructions */
.quiz-instructions {
    padding: 3rem 0;
    background: var(--bg-primary);
}

.instructions-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.instructions-card h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.instructions-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.instructions-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.instructions-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.difficulty-info h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.difficulty-item {
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.difficulty-item.beginner {
    border-color: var(--secondary-color);
    background: rgba(16, 185, 129, 0.05);
}

.difficulty-item.intermediate {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.difficulty-item.advanced {
    border-color: var(--accent-color);
    background: rgba(245, 158, 11, 0.05);
}

.difficulty-item strong {
    display: block;
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.difficulty-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Error Container */
.error-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.error-message h3 {
    color: #dc2626;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.error-message p {
    color: #7f1d1d;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .quiz-main {
        padding-top: 70px;
    }

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

    .quiz-meta {
        gap: 1rem;
        justify-content: center;
    }

    .quiz-level-badge,
    .quiz-questions-badge,
    .quiz-timer {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .question-content {
        padding: 1.5rem;
    }

    .question-text {
        font-size: 1.2rem;
    }

    .answer-options {
        padding: 1rem;
    }

    .answer-option {
        padding: 0.8rem 1rem;
        margin-bottom: 0.8rem;
    }

    .option-letter {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }

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

    .question-navigation {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .keyboard-hint {
        display: none;
    }

    .difficulty-grid {
        grid-template-columns: 1fr;
    }

    .instructions-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .quiz-header {
        padding: 1.5rem 0;
    }

    .quiz-section {
        padding: 2rem 0;
    }

    .question-content {
        padding: 1rem;
    }

    .question-text {
        font-size: 1.1rem;
    }

    .answer-options {
        padding: 0.5rem;
    }

    .answer-option {
        padding: 0.6rem 0.8rem;
        margin-bottom: 0.6rem;
    }

    .question-navigation {
        padding: 0.8rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}