/* DSGVO Datenschutzbeauftragter Quiz - Vollständige CSS-Datei */
/* Modernes, responsives Design für ISB/ISO Prüfungsvorbereitung */

/* CSS Reset und Grundlagen */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Haupt-Farbschema - Professionell und seriös */
    --primary-color: #2c3e50;
    --primary-light: #34495e;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;

    /* Neutrale Farben */
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #dee2e6;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.2);

    /* Typografie */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Abstände */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Übergänge */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Grundlegende Styling */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header Styling */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.shield-icon {
    font-size: 3rem;
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.3));
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
    position: relative;
    z-index: 1;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-xxl) 0;
}

/* Mode Selection Styling */
.mode-selection {
    max-width: 1000px;
    margin: 0 auto;
}

.welcome-section {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.welcome-section h2 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    font-weight: 600;
}

.welcome-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
}

.mode-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left var(--transition-slow);
}

.mode-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--secondary-color);
}

.mode-card:hover::before {
    left: 100%;
}

.mode-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    filter: grayscale(20%);
    transition: filter var(--transition-normal);
}

.mode-card:hover .mode-icon {
    filter: grayscale(0%);
}

.mode-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-weight: 600;
}

.mode-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.mode-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.feature {
    font-size: 0.9rem;
    color: var(--success-color);
    font-weight: 500;
}

.mode-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2980b9 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.mode-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-normal);
}

.mode-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
}

.mode-btn:hover::before {
    left: 100%;
}

.mode-btn:active {
    transform: translateY(0);
}

/* Quiz Interface Styling */
.quiz-interface {
    max-width: 900px;
    margin: 0 auto;
}

.quiz-header {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.quiz-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.question-counter {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.timer-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.timer-icon {
    font-size: 1.2rem;
}

.timer {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color) 0%, var(--success-color) 100%);
    border-radius: var(--radius-sm);
    transition: width var(--transition-normal);
    position: relative;
}

.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;
}

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

/* Question Navigation */
.question-navigation {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.question-navigation h4 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-weight: 600;
}

.question-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.nav-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    border-color: var(--secondary-color);
    transform: scale(1.1);
}

.nav-btn.current {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.nav-btn.answered {
    background: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.nav-btn.skipped {
    background: var(--warning-color);
    color: white;
    border-color: var(--warning-color);
}

/* Question Container */
.question-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.question-header {
    margin-bottom: var(--spacing-xl);
}

.question-text {
    font-size: 1.3rem;
    line-height: 1.6;
    color: black;
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.answers-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.answer-option {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.answer-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left var(--transition-normal);
}

.answer-option:hover {
    border-color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.05);
}

.answer-option:hover::before {
    left: 100%;
}

.answer-option.selected {
    border-color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.1);
}

.answer-input {
    margin-right: var(--spacing-md);
    transform: scale(1.2);
}

.answer-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    cursor: pointer;
    width: 100%;
}

.answer-letter {
    font-weight: 600;
    color: var(--secondary-color);
    min-width: 25px;
}

.answer-text {
    flex: 1;
    line-height: 1.5;
}

/* Quiz Controls */
.quiz-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.control-group {
    display: flex;
    gap: var(--spacing-md);
}

.control-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-normal);
}

.control-btn:hover::before {
    left: 100%;
}

.control-btn.primary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2980b9 100%);
    color: white;
}

.control-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.4);
}

.control-btn.secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.control-btn.secondary:hover {
    border-color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.05);
}

.control-btn.finish {
    background: linear-gradient(135deg, var(--success-color) 0%, #229954 100%);
    color: white;
}

.control-btn.finish:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.4);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.control-btn:disabled::before {
    display: none;
}

/* Unanswered Questions Section */
.unanswered-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    border-left: 4px solid var(--warning-color);
}

.unanswered-section h4 {
    color: var(--warning-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.unanswered-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.unanswered-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--warning-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.unanswered-btn:hover {
    background: #e67e22;
    transform: translateY(-2px);
}

/* Catalog View */
.catalog-view {
    max-width: 1000px;
    margin: 0 auto;
}

.catalog-header {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.catalog-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.catalog-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.back-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.back-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.catalog-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.catalog-question {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.catalog-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.catalog-question-number {
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.catalog-question-type {
    background: var(--bg-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.catalog-question-text {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.catalog-answers {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.catalog-answer {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    position: relative;
}

.catalog-answer.correct {
    background: rgba(39, 174, 96, 0.1);
    border-color: var(--success-color);
}

.catalog-answer .answer-letter {
    font-weight: 600;
    color: var(--secondary-color);
    min-width: 25px;
}

.catalog-answer.correct .answer-letter {
    color: var(--success-color);
}

.catalog-answer .answer-text {
    flex: 1;
    line-height: 1.5;
}

.correct-indicator {
    color: var(--success-color);
    font-weight: 700;
    font-size: 1.2rem;
}

/* Results View */
.results-view {
    max-width: 900px;
    margin: 0 auto;
}

.results-header {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.results-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    font-size: 2.2rem;
}

.score-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--success-color) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-medium);
    position: relative;
}

.score-circle::before {
    content: '';
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    background: var(--card-bg);
    z-index: 1;
}

.score-percentage {
    font-size: 2.5rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
    color: var(--primary-color);
}

.score-text {
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    z-index: 2;
    color: var(--text-secondary);
}

.results-details {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.result-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-color);
    border-radius: var(--radius-md);
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.results-feedback {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.feedback {
    font-size: 1.2rem;
    font-weight: 600;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.feedback.excellent {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
    border: 2px solid var(--success-color);
}

.feedback.good {
    background: rgba(52, 152, 219, 0.1);
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.feedback.passed {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
    border: 2px solid var(--warning-color);
}

.feedback.barely-passed {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
    border: 2px solid var(--warning-color);
}

.feedback.failed {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
}

.detailed-results {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.detailed-results h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.results-breakdown {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.results-breakdown .result-item {
    background: var(--bg-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--border-color);
    text-align: left;
}

.results-breakdown .result-item.correct {
    border-left-color: var(--success-color);
}

.results-breakdown .result-item.incorrect {
    border-left-color: var(--danger-color);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.result-number {
    font-weight: 600;
    color: var(--secondary-color);
}

.result-status {
    font-size: 1.2rem;
    font-weight: 700;
}

.result-status.correct {
    color: var(--success-color);
}

.result-status.incorrect {
    color: var(--danger-color);
}

.result-question {
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.result-answers {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.user-answer, .correct-answer {
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.user-answer {
    background: rgba(231, 76, 60, 0.1);
}

.correct-answer {
    background: rgba(39, 174, 96, 0.1);
}

.results-actions {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    margin-bottom: var(--spacing-sm);
}

.footer-note {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top: 5px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .header {
        padding: var(--spacing-lg) 0;
    }

    .logo {
        font-size: 2rem;
        flex-direction: column;
        text-align: center;
    }

    .shield-icon {
        font-size: 2.5rem;
    }

    .main-content {
        padding: var(--spacing-xl) 0;
    }

    .welcome-section h2 {
        font-size: 1.8rem;
    }

    .modes-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .mode-card {
        padding: var(--spacing-lg);
    }

    .quiz-info {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .question-nav {
        justify-content: center;
    }

    .nav-btn {
        width: 35px;
        height: 35px;
    }

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

    .quiz-controls {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .control-group {
        width: 100%;
        justify-content: center;
    }

    .control-btn {
        flex: 1;
        min-width: 120px;
    }

    .catalog-question-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

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

    .score-percentage {
        font-size: 2rem;
    }

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

@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.2rem;
        --spacing-sm: 0.4rem;
        --spacing-md: 0.8rem;
        --spacing-lg: 1.2rem;
        --spacing-xl: 1.6rem;
        --spacing-xxl: 2rem;
    }

    .logo {
        font-size: 1.5rem;
    }

    .welcome-section h2 {
        font-size: 1.5rem;
    }

    .mode-card {
        padding: var(--spacing-md);
    }

    .mode-icon {
        font-size: 2.5rem;
    }

    .quiz-header,
    .question-navigation,
    .question-container,
    .quiz-controls,
    .unanswered-section {
        padding: var(--spacing-md);
    }

    .question-text {
        font-size: 1rem;
    }

    .answer-option {
        padding: var(--spacing-md);
    }

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

    .catalog-question {
        padding: var(--spacing-md);
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .quiz-controls,
    .question-navigation,
    .unanswered-section,
    .results-actions {
        display: none !important;
    }

    .main-content {
        padding: 0;
    }

    .question-container,
    .catalog-question,
    .results-view {
        box-shadow: none;
        border: 1px solid var(--border-color);
        break-inside: avoid;
        margin-bottom: var(--spacing-lg);
    }

    .mode-selection {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --card-bg: #2d3748;
        --text-primary: #f7fafc;
        --text-secondary: #a0aec0;
        --border-color: #4a5568;
    }

    .mode-card,
    .quiz-header,
    .question-navigation,
    .question-container,
    .quiz-controls,
    .unanswered-section,
    .catalog-header,
    .catalog-question,
    .results-header,
    .results-details,
    .results-feedback,
    .detailed-results,
    .results-actions {
        background: var(--card-bg);
        color: var(--text-primary);
    }

    .answer-option {
        background: #374151;
        border-color: var(--border-color);
    }

    .answer-option:hover {
        background: rgba(52, 152, 219, 0.2);
    }

    .control-btn.secondary {
        background: #374151;
        color: var(--text-primary);
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* Focus Styles für Accessibility */
*:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.control-btn:focus,
.mode-btn:focus,
.nav-btn:focus,
.back-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

.answer-option:focus-within {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #0066cc;
        --success-color: #008000;
        --danger-color: #cc0000;
        --warning-color: #cc6600;
        --border-color: #666666;
    }

    .mode-card,
    .answer-option {
        border-width: 3px;
    }

    .control-btn {
        border-width: 3px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .progress-fill::after {
        animation: none;
    }

    .loading-spinner {
        animation: none;
        border: 5px solid var(--secondary-color);
    }

    .mode-card::before,
    .answer-option::before,
    .control-btn::before {
        display: none;
    }
}