/* ==================== QUIZ SECTION - ADVANCED & RESPONSIVE ==================== */
.quiz-container {
    max-width: 900px;
    margin: var(--space-xl) auto;
    background-color: var(--light-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

body.dark-mode .quiz-container {
    background-color: #1e1e2f;
    color: #f1f1f1;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border: 1px solid #333;
}

.quiz-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--light-gray);
    gap: var(--space-md);
}

body.dark-mode .quiz-header {
    border-bottom: 2px solid #333;
}

.quiz-header h2 {
    color: var(--dark-color);
    margin: 0;
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
}

.quiz-header h2 i {
    color: var(--primary-color);
    font-size: 1.2em;
}

body.dark-mode .quiz-header h2 {
    color: var(--success-color);
}

.quiz-stats {
    display: flex;
    gap: var(--space-md);
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.9);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(5px);
    box-shadow: var(--shadow-sm);
}

body.dark-mode .quiz-stats {
    background-color: rgba(30, 30, 47, 0.9);
    border: 1px solid #444;
}

.quiz-stats span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.95rem;
}

.quiz-stats span:first-child {
    color: var(--primary-color);
}

.quiz-stats span:last-child {
    color: var(--success-color);
}

/* Category Selection */
.quiz-categories {
    margin-bottom: var(--space-lg);
    position: relative;
}

.quiz-categories h3 {
    color: var(--dark-color);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
}

body.dark-mode .quiz-categories h3 {
    color: #ddd;
}

.category-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-bottom: var(--space-xs);
}

.category-btn {
    padding: var(--space-sm) var(--space-md);
    background-color: var(--light-gray);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-color);
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: var(--shadow-sm);
    min-width: 100px;
    text-align: center;
}

body.dark-mode .category-btn {
    background-color: #2c2c3c;
    color: #ccc;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    transition: var(--transition-normal);
    z-index: -1;
}

.category-btn:hover::before {
    width: 100%;
}

.category-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
    transform: translateY(-2px);
}

body.dark-mode .category-btn.active {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
}

.category-btn:hover:not(.active) {
    color: white;
}

/* Question Container */
.quiz-question-container {
    position: relative;
    background-color: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-lg);
    transition: var(--transition-fast);
}

body.dark-mode .quiz-question-container {
    background-color: #292938;
    border: 1px solid #333;
}

/* Timer */
.quiz-timer {
    height: 8px;
    width: 100%;
    background-color: var(--light-gray);
    border-radius: 4px;
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-inset);
}

body.dark-mode .quiz-timer {
    background-color: #333;
}

.timer-progress {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--accent-color));
    border-radius: 4px;
    transition: width 1s linear;
    position: relative;
}

body.dark-mode .timer-progress {
    background: linear-gradient(90deg, 
        var(--success-color), 
        var(--accent-color));
}

.timer-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.1), 
        rgba(255,255,255,0.3));
    animation: shine 2s infinite;
}

#time-left {
    position: absolute;
    right: 0;
    top: -25px;
    font-size: 0.8rem;
    color: var(--gray-color);
    font-weight: 600;
}

body.dark-mode #time-left {
    color: #aaa;
}

/* Question Box */
.question-box {
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
    position: relative;
    background-color: var(--light-gray);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

body.dark-mode .question-box {
    background-color: #2d2d3d;
}

.question-box h3 {
    color: var(--dark-color);
    text-align: center;
    margin: 0;
    font-size: 1.25rem;
    line-height: 1.4;
    font-weight: 500;
}

body.dark-mode .question-box h3 {
    color: #fff;
}

.question-meta {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    font-size: 0.85rem;
    color: var(--gray-color);
}

.difficulty {
    padding: 2px var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.difficulty.easy {
    background-color: rgba(76, 201, 240, 0.1);
    color: var(--success-color);
}

.difficulty.medium {
    background-color: rgba(255, 193, 7, 0.1);
    color: #ffc107;
}

.difficulty.hard {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

/* Options */
.options-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.option-btn {
    padding: var(--space-md);
    background-color: white;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-lg);
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    color: var(--dark-color);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-sm);
}

body.dark-mode .option-btn {
    background-color: #2e2e2e;
    color: #f0f0f0;
    border: 2px solid #444;
}

.option-btn::before {
    content: '';
    width: 22px;
    height: 22px;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-circle);
    flex-shrink: 0;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

body.dark-mode .option-btn::before {
    border-color: #555;
}

.option-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.option-btn:hover::before {
    border-color: var(--primary-color);
}

.option-btn.correct {
    background-color: rgba(76, 201, 240, 0.15);
    border-color: var(--success-color);
    color: var(--dark-color);
    animation: pulseCorrect 0.5s ease;
}

.option-btn.correct::before {
    content: '✅';
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.option-btn.wrong {
    background-color: rgba(247, 37, 133, 0.15);
    border-color: var(--danger-color);
    color: var(--dark-color);
    animation: pulseWrong 0.5s ease;
}

.option-btn.wrong::before {
    content: '✕';
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.option-btn.selected.wrong {
    background-color: rgba(247, 37, 133, 0.1);
    border-color: var(--danger-color);
}

/* When selected option is wrong */
.option-btn.selected.wrong::before {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: white;
    content: '❌';
}
.option-btn.selected.correct {
    background-color: rgba(76, 201, 240, 0.1);
    border-color: var(--success-color);
}

/* When selected option is correct */
.option-btn.selected.correct::before {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
    content: '✅';
}
.option-btn.selected {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.option-btn.selected::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    background-color: white;
    border-color: white;
}

/* Quiz Controls */
.quiz-controls {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-lg);
    gap: var(--space-md);
    flex-wrap: wrap;
}

.quiz-controls button {
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1rem;
    flex: 1;
    justify-content: center;
    min-width: 120px;
}

#prev-btn, #next-btn, #submit-btn, #restart-quiz, #new-quiz {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 6px rgba(67, 97, 238, 0.2);
}

#prev-btn:hover, #next-btn:hover, #submit-btn:hover, 
#restart-quiz:hover, #new-quiz:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--accent-color));
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(67, 97, 238, 0.3);
}

#prev-btn:active, #next-btn:active, #submit-btn:active, 
#restart-quiz:active, #new-quiz:active {
    transform: translateY(0);
}

#prev-btn:disabled {
    background: var(--light-gray);
    color: var(--gray-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

body.dark-mode #prev-btn:disabled {
    background: #333;
    color: #777;
}

/* Quiz Result */
.quiz-result {
    background-color: white;
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    animation: fadeIn 0.5s ease;
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-md);
}

body.dark-mode .quiz-result {
    background-color: #2d2d3d;
    border: 1px solid #333;
}

.quiz-result h3 {
    color: var(--dark-color);
    margin-top: 0;
    margin-bottom: var(--space-lg);
    font-size: 1.75rem;
    position: relative;
    display: inline-block;
    font-weight: 700;
}

body.dark-mode .quiz-result h3 {
    color: #fff;
}

.quiz-result h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--primary-color), 
        var(--accent-color));
    border-radius: 3px;
}

.result-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    text-align: left;
    background-color: var(--light-gray);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

body.dark-mode .result-details {
    background-color: #333344;
}

.result-details p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--dark-color);
    display: flex;
    justify-content: space-between;
}

body.dark-mode .result-details p {
    color: #ddd;
}

.result-details span {
    font-weight: 600;
    color: var(--primary-color);
}

/* Badges */
.quiz-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    min-width: 120px;
    padding: var(--space-md);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
    color: white;
}

.badge:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.3);
}

.badge i {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: var(--radius-circle);
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.badge span {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* Action Buttons */
.quiz-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

#restart-quiz, #new-quiz {
    min-width: 180px;
    padding: var(--space-md) var(--space-lg);
}

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

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes pulseCorrect {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); box-shadow: 0 0 15px rgba(76, 201, 240, 0.5); }
    100% { transform: scale(1); }
}

@keyframes pulseWrong {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); box-shadow: 0 0 15px rgba(247, 37, 133, 0.5); }
    100% { transform: scale(1); }
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Feedback */
.feedback {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: var(--space-sm);
    text-align: center;
    font-weight: 600;
    animation: fadeIn 0.3s ease;
    z-index: 10;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.feedback.correct {
    background-color: rgba(76, 201, 240, 0.2);
    color: var(--success-color);
    border-top: 2px solid var(--success-color);
}

.feedback.wrong {
    background-color: rgba(247, 37, 133, 0.2);
    color: var(--danger-color);
    border-top: 2px solid var(--danger-color);
}

/* Hint Button */
.hint-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: none;
    border: none;
    color: var(--gray-color);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition-fast);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-circle);
}

.hint-btn:hover {
    color: var(--primary-color);
    transform: rotate(15deg) scale(1.1);
    background-color: rgba(67, 97, 238, 0.1);
}

body.dark-mode .hint-btn:hover {
    background-color: rgba(67, 97, 238, 0.2);
}

/* Progress Indicator */
.progress-container {
    margin: var(--space-lg) 0;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
    font-size: 0.9rem;
    color: var(--gray-color);
}

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

body.dark-mode .progress-bar {
    background-color: #333;
}

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

/* Responsive Adjustments */
@media (max-width: 768px) {
    .quiz-container {
        padding: var(--space-lg);
        margin: var(--space-lg) auto;
    }
    
    .quiz-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .quiz-stats {
        width: 100%;
        justify-content: space-between;
    }
    
    .result-details {
        grid-template-columns: 1fr;
    }
    
    .quiz-badges {
        gap: var(--space-md);
    }
    
    .quiz-controls {
        flex-direction: column;
    }
    
    .quiz-actions {
        flex-direction: column;
        align-items: center;
    }
    
    #restart-quiz, #new-quiz {
        width: 100%;
    }
    
    .question-box h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .quiz-container {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }
    
    .category-buttons {
        gap: var(--space-xs);
        overflow-x: auto;
        padding-bottom: var(--space-xs);
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
    }
    
    .category-buttons::-webkit-scrollbar {
        height: 4px;
    }
    
    .category-buttons::-webkit-scrollbar-thumb {
        background-color: var(--primary-color);
        border-radius: 2px;
    }
    
    .category-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.75rem;
        white-space: nowrap;
        min-width: auto;
    }
    
    .question-box {
        padding: var(--space-sm) var(--space-md);
    }
    
    .question-box h3 {
        font-size: 1rem;
    }
    
    .option-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
    }
    
    .badge {
        min-width: 100px;
        padding: var(--space-sm);
    }
    
    .badge i {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .quiz-result {
        padding: var(--space-lg);
    }
    
    .result-details {
        padding: var(--space-md);
    }
}