/* ================================
   QUIZ PAGE STYLES - COMPLETE
   ================================ */

:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #10b981;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    --navbar-bg: #ffffff;
    --success: #10b981;
    --info: #3b82f6;
    --warning: #f59e0b;
    --danger: #ef4444;
    --code-bg: #f1f5f9;
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --border: #374151;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --navbar-bg: #111827;
    --code-bg: #0f172a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ================================
   HERO SECTION (Quiz Version)
   ================================ */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, 
        rgba(139, 92, 246, 0.15), 
        rgba(16, 185, 129, 0.15));
    border-bottom: 2px solid var(--border);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%238b5cf6' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.9; }
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border-radius: 50px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.3s ease;
}

.stat:hover {
    transform: translateY(-4px);
}

.stat i {
    color: var(--primary);
    font-size: 1.25rem;
}

.stat span {
    font-weight: 600;
    color: var(--text-primary);
}

/* ================================
   MAIN QUIZ CONTAINER
   ================================ */
.quiz-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* ================================
   QUIZ SELECTION SECTION
   ================================ */
.quiz-selection h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.quiz-selection h2 i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.difficulty-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.difficulty-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.difficulty-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.difficulty-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px var(--shadow-lg);
    border-color: var(--primary);
}

.difficulty-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.difficulty-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.card-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.card-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.start-quiz-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.start-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.badge-preview {
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 10px;
    color: var(--primary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* ================================
   PROGRESS STATS
   ================================ */
.progress-stats {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 3rem;
}

.progress-stats h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.progress-stats h3 i {
    color: var(--primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: transform 0.3s ease;
}

.stat-box:hover {
    transform: translateY(-4px);
}

.stat-box i {
    font-size: 2rem;
    color: var(--primary);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ================================
   ACTIVE QUIZ SECTION
   ================================ */
.quiz-header {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 24px var(--shadow);
}

.quiz-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

#quizTitle {
    font-size: 2rem;
    color: var(--text-primary);
}

.quiz-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quiz-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

#quizDifficulty {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 6px;
    width: 0%;
    transition: width 0.5s ease;
}

/* ================================
   QUESTION CONTAINER
   ================================ */
.question-container {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 24px var(--shadow);
    animation: slideIn 0.5s ease;
}

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

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

.question-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.question-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.question-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.code-snippet {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    overflow-x: auto;
}

.options-container {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.option {
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.option:hover {
    transform: translateX(5px);
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
}

.option.selected {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.1);
}

.option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.option.incorrect {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.option input[type="radio"] {
    display: none;
}

.option-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 50%;
    font-weight: 600;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.option.selected .option-label {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.option-text {
    flex: 1;
}

/* ================================
   QUIZ NAVIGATION
   ================================ */
.quiz-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.question-dots {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.question-dot {
    width: 12px;
    height: 12px;
    background: var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.question-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.question-dot.answered {
    background: var(--secondary);
}

/* ================================
   QUIZ CONTROLS
   ================================ */
.quiz-controls {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.submit-btn {
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--success), #0ca678);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.quit-btn {
    padding: 1rem 2.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quit-btn:hover {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
    transform: translateY(-2px);
}

/* ================================
   RESULTS SECTION
   ================================ */
.results-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 20px 40px var(--shadow-lg);
    animation: slideIn 0.5s ease;
}

.results-header {
    text-align: center;
    margin-bottom: 3rem;
}

.results-header i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.results-header h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.results-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.score-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.score-circle {
    position: relative;
    width: 120px;
    height: 120px;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-text span {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.score-text small {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.score-details {
    flex: 1;
    min-width: 300px;
}

#resultTitle {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.score-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.score-stat {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.score-stat i {
    font-size: 1.5rem;
}

.score-stat:nth-child(1) i { color: var(--success); }
.score-stat:nth-child(2) i { color: var(--danger); }
.score-stat:nth-child(3) i { color: var(--primary); }
.score-stat:nth-child(4) i { color: var(--warning); }

.score-stat strong {
    color: var(--text-primary);
    margin-left: 0.25rem;
}

/* ================================
   BADGE EARNED
   ================================ */
.badge-earned {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, 
        rgba(139, 92, 246, 0.1), 
        rgba(16, 185, 129, 0.1));
    border-radius: 16px;
    margin-bottom: 2rem;
    animation: bounceIn 1s ease;
}

@keyframes bounceIn {
    0% { transform: scale(0.5); opacity: 0; }
    60% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); }
}

.badge-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.badge-info h4 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.badge-info p {
    color: var(--text-secondary);
}

/* ================================
   QUIZ REVIEW
   ================================ */
.quiz-review {
    margin-top: 3rem;
}

.quiz-review h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.review-questions {
    display: grid;
    gap: 1rem;
}

.review-item {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border-left: 4px solid var(--border);
}

.review-item.correct {
    border-left-color: var(--success);
}

.review-item.incorrect {
    border-left-color: var(--danger);
}

.review-question {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.review-answer {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.review-answer strong {
    color: var(--text-primary);
}

/* ================================
   RESULTS ACTIONS
   ================================ */
.results-actions {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.action-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.retry-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.retry-btn:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.newquiz-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.newquiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.share-btn {
    background: var(--info);
    color: white;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

/* ================================
   CONFETTI
   ================================ */
#confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    opacity: 0;
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 768px) {

    .hero h1 {
        font-size: 2rem;
    }

    .hero-stats {
        gap: 1rem;
    }

    .stat {
        padding: 0.5rem 1rem;
    }

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

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

    .quiz-info {
        flex-direction: column;
        align-items: flex-start;
    }

    .quiz-meta {
        flex-wrap: wrap;
    }

    .score-display {
        flex-direction: column;
        gap: 2rem;
    }

    .score-stats {
        grid-template-columns: 1fr;
    }

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

    .question-dots {
        order: -1;
    }

    .quiz-controls {
        flex-direction: column;
        align-items: center;
    }

    .results-actions {
        flex-direction: column;
        align-items: stretch;
    }
}