/**
 * Just Options - Zentrale Stylesheet-Datei
 * Website: https://www.just-options.de
 * Autor: Markus Lehleiter
 *
 * Inhaltsverzeichnis:
 * 1. CSS Variables (Custom Properties)
 * 2. Reset & Base Styles
 * 3. Typography
 * 4. Layout & Container
 * 5. Header & Navigation
 * 6. Hero Section
 * 7. Buttons
 * 8. Sections
 * 9. Book Preview
 * 10. Features Grid
 * 11. Author Section
 * 12. Reviews Slider
 * 13. FAQ Accordion
 * 14. Newsletter
 * 15. CTA Section
 * 16. Footer
 * 17. Cookie Consent
 * 18. Blog Styles
 * 19. Quiz Styles
 * 20. Utility Classes
 * 21. Responsive Breakpoints
 */

/* ==========================================================================
   1. CSS Variables (Custom Properties)
   ========================================================================== */

:root {
    /* Primary Colors */
    --primary: #003366;
    --secondary: #7e97c3;
    --accent: #ffd700;

    /* Neutral Colors */
    --light: #ffffff;
    --dark: #333333;
    --black: #000000;
    --text-gray: #555555;
    --bg-gray: #e2e2e3;

    /* Semantic Colors */
    --success: #66cc99;
    --danger: #ff6b6b;
    --warning: #ffa533;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Border Radius */
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 30px;

    /* Shadows */
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;

    /* Container */
    --container-max-width: 1200px;
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

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

html {
    font-size: 16px;
    font-size: calc(14px + 0.25vw);
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 1rem;
    overflow-x: hidden;
    width: 100%;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1 {
    font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
    line-height: 1.2;
    font-weight: 700;
}

h2 {
    font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem);
    line-height: 1.2;
    font-weight: 700;
}

h3 {
    font-size: clamp(1.2rem, 2vw + 0.3rem, 1.8rem);
    line-height: 1.3;
    font-weight: 600;
}

h4 {
    font-size: clamp(1rem, 1.5vw + 0.3rem, 1.4rem);
    line-height: 1.4;
    font-weight: 600;
}

p {
    font-size: clamp(0.9rem, 1vw + 0.5rem, 1.1rem);
}

/* ==========================================================================
   4. Layout & Container
   ========================================================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */

header {
    background-color: var(--primary);
    color: var(--light);
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    max-width: 100%;
}

.nav-links {
    display: flex;
    justify-content: flex-end;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin: 0 0 0 var(--spacing-lg);
}

.nav-links a {
    color: var(--light);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
    display: block;
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--accent);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--light);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: 110;
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */

.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
    background-color: var(--dark);
    color: var(--light);
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    max-width: 90%;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    padding: 0 10px;
}

/* Page Title (for subpages) */
.page-title {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
    background-color: var(--dark);
    color: var(--light);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.page-title h1 {
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    max-width: 90%;
    margin-left: auto;
    margin-right: auto;
}

.page-title p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 10px;
}

/* ==========================================================================
   7. Buttons
   ========================================================================== */

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: bold;
    transition: all var(--transition-fast);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border: 2px solid transparent;
    font-size: 1rem;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--black);
    border-color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--black);
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
}

.btn-secondary {
    background-color: transparent;
    color: var(--light);
    border: 2px solid var(--light);
    margin-left: var(--spacing-md);
}

.btn-secondary:hover {
    background-color: var(--light);
    color: var(--dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   8. Sections
   ========================================================================== */

section {
    padding: var(--spacing-xxl) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

section:nth-child(odd) {
    background-color: var(--light);
}

section:nth-child(even) {
    background-color: var(--bg-gray);
}

section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Explicit section background overrides */
#book {
    background-color: var(--bg-gray);
}

#toc {
    background-color: var(--bg-gray);
}

#author {
    background-color: var(--light);
}

#faq {
    background-color: var(--bg-gray);
}

/* ==========================================================================
   9. Book Preview
   ========================================================================== */

.book-preview {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-lg);
}

.book-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.book-image img {
    max-width: 100%;
    height: auto;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-sm);
    object-fit: contain;
}

.book-details {
    flex: 2;
    min-width: 300px;
}

.book-details h3 {
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.price-tag {
    display: inline-block;
    background-color: var(--accent);
    color: var(--black);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-weight: bold;
    margin: var(--spacing-md) 0;
}

/* ==========================================================================
   10. Features Grid
   ========================================================================== */

.features {
    background-color: var(--bg-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    font-size: 1.1rem;
}

.feature-card h3 span {
    background-color: var(--primary);
    color: var(--light);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-right: var(--spacing-sm);
    flex-shrink: 0;
}

/* ==========================================================================
   11. Author Section
   ========================================================================== */

.author {
    text-align: center;
}

.author-info {
    max-width: 800px;
    margin: 0 auto;
}

.author-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   12. Reviews Slider
   ========================================================================== */

.reviews {
    background-color: var(--light);
    color: var(--dark);
    position: relative;
    z-index: 1;
}

.reviews h2 {
    color: var(--primary);
}

.reviews-slider-container {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 40px;
}

.reviews-slider-wrapper {
    overflow: hidden;
    position: relative;
}

.reviews-slider {
    display: flex;
    transition: transform var(--transition-medium);
    margin: 0;
    padding: var(--spacing-md) 0;
}

.review-card {
    flex: 0 0 300px;
    background-color: var(--light);
    color: var(--dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-right: 20px;
    box-shadow: var(--shadow-md);
    height: auto;
    display: flex;
    flex-direction: column;
}

.review-stars {
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.review-content {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.review-author {
    font-weight: bold;
    text-align: right;
    margin-top: auto;
}

/* Slider Navigation */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--light);
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
    display: flex;
    justify-content: center;
    align-items: center;
}

.slider-arrow:hover {
    opacity: 1;
}

.prev-arrow {
    left: 0;
}

.next-arrow {
    right: 0;
}

.slider-dots {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    background-color: rgba(0, 51, 102, 0.3);
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.dot.active {
    background-color: var(--primary);
}

/* ==========================================================================
   13. FAQ Accordion
   ========================================================================== */

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

.faq-item {
    margin-bottom: 1.5rem;
}

.faq-question {
    background-color: var(--light);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: bold;
    border-left: 4px solid var(--primary);
    position: relative;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    transition: transform var(--transition-fast);
}

.faq-question.active::after {
    content: '-';
}

.faq-answer {
    padding: var(--spacing-md);
    background-color: var(--light);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    margin-top: var(--spacing-sm);
    display: none;
}

.faq-answer.show {
    display: block;
}

/* ==========================================================================
   14. Newsletter
   ========================================================================== */

.newsletter {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
    background-color: var(--dark);
    color: var(--light);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    border-top: none;
    border-bottom: none;
}

.newsletter h3 {
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.newsletter-subtitle {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.newsletter-form input[type="email"],
.newsletter-form input[type="text"] {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-family: 'Roboto', sans-serif;
    font-size: 1rem;
}

.newsletter-form button {
    background-color: var(--accent);
    color: var(--black);
    border: none;
    padding: 0 1.5rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    cursor: pointer;
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
    font-size: 1rem;
    min-height: 44px;
}

.newsletter-form button:hover {
    background-color: var(--light);
    color: var(--dark);
}

/* ==========================================================================
   15. CTA Section
   ========================================================================== */

.cta {
    text-align: center;
    padding: var(--spacing-xxl) 0;
    background-color: var(--light);
}

.cta h2 {
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cta p {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

.cta .btn-primary {
    background-color: var(--accent);
    color: var(--black);
    border-color: var(--black);
}

.cta .btn-primary:hover {
    background-color: var(--black);
    color: var(--accent);
    border-color: var(--accent);
}

/* ==========================================================================
   16. Footer
   ========================================================================== */

footer {
    background-color: var(--primary);
    color: var(--light);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: none;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.logo-container {
    display: flex;
    align-items: center;
    margin-right: var(--spacing-lg);
}

.footer-links {
    display: flex;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links li {
    margin: 0 var(--spacing-md);
}

.footer-links a {
    color: var(--light);
    padding: 0.25rem 0;
    display: inline-block;
}

.footer-links a:hover {
    text-decoration: underline;
}

.social-icons {
    margin: var(--spacing-md) 0;
}

.social-icons a {
    color: var(--light);
    margin: 0 0.8rem;
    font-size: 1.8rem;
    transition: color var(--transition-fast);
    display: inline-block;
    padding: var(--spacing-sm);
}

.social-icons a:hover {
    color: var(--accent);
}

.copyright {
    font-size: 0.9rem;
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   17. Cookie Consent
   ========================================================================== */

.cookie-consent {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.9);
    color: var(--light);
    padding: 20px;
    z-index: 9999;
    display: none;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.2);
}

.cookie-consent.show {
    display: block;
}

.cookie-consent-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.cookie-consent h3 {
    margin-top: 0;
    color: var(--light);
    font-size: 1.3rem;
}

.cookie-category {
    margin: 15px 0;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cookie-category:last-child {
    border-bottom: none;
}

.cookie-category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cookie-toggle {
    display: flex;
    align-items: center;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    margin-left: 10px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: var(--light);
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--accent);
}

input:disabled + .toggle-slider {
    background-color: #555;
    cursor: not-allowed;
}

input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

.essential-note {
    font-size: 0.8rem;
    color: #aaa;
    font-style: italic;
}

.cookie-description {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #ccc;
}

.cookie-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.cookie-policy-link {
    color: var(--accent);
    text-decoration: underline;
    margin-right: 15px;
}

.cookie-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.cookie-btn {
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    border: none;
    font-family: 'Roboto', sans-serif;
    transition: all var(--transition-fast);
}

.btn-accept-all {
    background-color: var(--accent);
    color: var(--black);
}

.btn-accept-all:hover {
    background-color: var(--light);
    color: var(--black);
}

.btn-accept-necessary {
    background-color: transparent;
    color: var(--light);
    border: 1px solid var(--light);
}

.btn-accept-necessary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-save-preferences {
    background-color: #555;
    color: var(--light);
}

.btn-save-preferences:hover {
    background-color: #777;
}

/* ==========================================================================
   18. Blog Styles
   ========================================================================== */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.blog-card {
    background-color: var(--light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.blog-image {
    height: 200px;
    width: 100%;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.blog-card:hover .blog-image img {
    transform: scale(1.1);
}

.blog-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.blog-date {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.blog-title {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.3;
}

.blog-excerpt {
    margin-bottom: 1.5rem;
    color: var(--text-gray);
    flex-grow: 1;
}

/* Blog Article Styles */
.blog-article {
    padding: var(--spacing-lg);
    background-color: var(--light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.blog-article h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.blog-article h3 {
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.blog-article p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
}

.blog-article ul,
.blog-article ol {
    list-style-position: inside;
    padding-left: 0;
    margin-bottom: var(--spacing-md);
    color: var(--text-gray);
}

.blog-article li {
    margin-bottom: var(--spacing-sm);
}

.blog-article strong {
    color: var(--primary);
}

.blog-article a {
    color: var(--accent);
    font-weight: bold;
}

.blog-article a:hover {
    text-decoration: underline;
}

/* Links in Blog Content */
.blog-content a:not(.btn) {
    color: var(--primary);
    text-decoration: underline;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.blog-content a:not(.btn):hover {
    color: var(--accent);
}

/* Strategy Box (for blog articles) */
.strategy-box {
    border: 1px solid var(--bg-gray);
    padding: 1.5rem;
    margin-bottom: var(--spacing-lg);
    border-radius: 8px;
    background-color: #f9f9f9;
}

.strategy-box h4 {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    border-bottom: 2px solid var(--accent);
    padding-bottom: var(--spacing-sm);
    display: inline-block;
}

.pros-cons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.pros, .cons {
    flex: 1;
    min-width: 250px;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.pros {
    background-color: rgba(102, 204, 153, 0.1);
    border-left: 3px solid var(--success);
}

.cons {
    background-color: rgba(255, 99, 71, 0.1);
    border-left: 3px solid tomato;
}

.example-box {
    background-color: rgba(126, 151, 195, 0.1);
    border-left: 3px solid var(--secondary);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-sm);
}

.callout {
    border-left: 4px solid var(--accent);
    padding: var(--spacing-md);
    background-color: rgba(255, 215, 0, 0.1);
    margin: 1.5rem 0;
}

.table-of-contents {
    background-color: #f5f5f5;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
}

.table-of-contents h3 {
    margin-bottom: 0.8rem;
}

.table-of-contents ol {
    list-style-position: inside;
    padding-left: var(--spacing-md);
}

.table-of-contents li {
    margin-bottom: var(--spacing-sm);
}

.table-of-contents a {
    color: var(--primary);
}

/* Standardized Content Boxes */
.tip-box {
    background-color: rgba(102, 204, 153, 0.1);
    border-left: 4px solid var(--success);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-sm);
}

.tip-box h4 {
    color: var(--success);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.warning-box {
    background-color: rgba(255, 165, 51, 0.1);
    border-left: 4px solid var(--warning);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-sm);
}

.warning-box h4 {
    color: #d97706;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.disclaimer-box {
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    margin: var(--spacing-lg) 0;
    color: var(--dark);
    font-size: 0.95rem;
}

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

.key-term {
    font-weight: 600;
    color: var(--primary);
    border-bottom: 1px dotted var(--secondary);
    cursor: help;
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--bg-gray);
}

.data-table th {
    background-color: var(--primary);
    color: var(--light);
    font-weight: 600;
}

.data-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.data-table tr:hover {
    background-color: rgba(126, 151, 195, 0.1);
}

/* Footer Logo */
.footer-logo {
    max-width: 120px;
    height: auto;
}

.table-of-contents a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   19. Quiz Styles
   ========================================================================== */

#options-quiz {
    background-color: #f9f9f9;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.quiz-section {
    margin-bottom: var(--spacing-lg);
}

.card {
    background-color: var(--light);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

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

.quiz-icon {
    color: var(--primary);
    font-size: 2rem;
    margin-right: var(--spacing-md);
}

.progress-container {
    width: 100%;
    height: 8px;
    background-color: var(--bg-gray);
    border-radius: 4px;
    margin: var(--spacing-md) 0 var(--spacing-lg);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--accent);
    width: 0;
    border-radius: 4px;
    transition: width var(--transition-medium);
}

#answer-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: 1.5rem;
}

.answer-btn {
    background-color: var(--light);
    color: var(--dark);
    border: 2px solid var(--secondary);
    border-radius: 8px;
    padding: var(--spacing-md) 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    text-align: left;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.answer-btn:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--secondary);
    transition: width var(--transition-fast);
}

.answer-btn:hover {
    background-color: var(--secondary);
    color: var(--light);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.answer-btn.correct {
    background-color: var(--success);
    color: var(--light);
    border-color: var(--success);
}

.answer-btn.wrong {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.option-letter {
    background-color: var(--primary);
    color: var(--light);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-right: 0.8rem;
    font-weight: 500;
    flex-shrink: 0;
}

.disclaimer-box {
    background-color: #f8f9fa;
    border-left: 4px solid var(--warning);
    padding: 1.2rem;
    margin: 1.5rem 0;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-gray);
    text-align: left;
}

.disclaimer-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--dark);
    display: flex;
    align-items: center;
}

.disclaimer-title i {
    color: var(--warning);
    margin-right: var(--spacing-sm);
    font-size: 1.1rem;
}

/* ==========================================================================
   20. Utility Classes
   ========================================================================== */

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

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

/* Chapter List */
.chapter-list {
    max-width: 800px;
    margin: var(--spacing-lg) auto;
}

.chapter-item {
    background-color: var(--light);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.chapter-title {
    font-weight: bold;
    color: var(--primary);
}

/* Bonus Banner */
.bonus-banner {
    background-color: var(--accent);
    color: var(--black);
    padding: 1.5rem var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) auto;
    max-width: 800px;
    text-align: center;
}

.bonus-banner h3 {
    margin-bottom: var(--spacing-sm);
}

.bonus-banner .btn-primary {
    background-color: var(--primary);
    color: var(--light);
    border-color: var(--light);
    margin-top: 15px;
    display: inline-block;
}

.bonus-banner .btn-primary:hover {
    background-color: var(--light);
    color: var(--primary);
    border-color: var(--primary);
}

/* ==========================================================================
   21. Responsive Breakpoints
   ========================================================================== */

/* Large Tablets and Small Desktops */
@media screen and (max-width: 992px) {
    .container {
        width: 90%;
    }

    h1 {
        font-size: clamp(1.8rem, 3vw + 1rem, 3rem);
    }

    h2 {
        font-size: clamp(1.6rem, 2.5vw + 0.5rem, 2.5rem);
    }

    h3 {
        font-size: clamp(1.1rem, 1.5vw + 0.3rem, 1.5rem);
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .feature-card h3 {
        font-size: 1rem;
    }

    .book-preview {
        gap: 1.5rem;
    }
}

/* Tablets */
@media screen and (max-width: 860px) {
    .container {
        width: 95%;
        padding: 0 10px;
    }

    section {
        padding: var(--spacing-xl) 0;
    }

    .reviews-slider-container {
        padding: 0 35px;
    }
}

/* Mobile Devices */
@media screen and (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav-container {
        justify-content: center;
        text-align: center;
    }

    .logo {
        margin: 0 auto;
        padding: var(--spacing-sm) 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--primary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 100;
        padding: var(--spacing-lg);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links li {
        margin: var(--spacing-md) 0;
    }

    .nav-links a {
        font-size: 1.2rem;
        padding: var(--spacing-sm) 0;
    }

    .mobile-menu-toggle {
        position: absolute;
        top: 1.5rem;
        right: 2rem;
    }

    .book-preview {
        flex-direction: column;
    }

    .book-image {
        width: 100%;
        max-width: 350px;
        margin: 0 auto;
    }

    .btn-secondary {
        margin-left: 0;
        margin-top: var(--spacing-md);
        display: block;
        width: 80%;
        margin: var(--spacing-md) auto 0;
    }

    .btn-primary {
        display: block;
        width: 80%;
        margin: 0 auto;
    }

    .feature-card {
        min-height: auto;
    }

    .reviews-slider-container {
        padding: 0 30px;
    }

    .review-card {
        flex: 0 0 calc(100% - 20px);
        min-height: 200px;
    }

    .review-content {
        min-height: auto;
    }

    .newsletter-form {
        flex-direction: column;
        width: 90%;
    }

    .newsletter-form input {
        border-radius: var(--radius-sm);
        margin-bottom: var(--spacing-md);
        width: 100%;
        min-height: 44px;
    }

    .newsletter-form button {
        border-radius: var(--radius-sm);
        padding: 0.8rem;
        width: 100%;
    }

    .slider-arrow {
        width: 36px;
        height: 36px;
    }

    section {
        padding: var(--spacing-xl) 0;
    }

    .footer-content {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .logo-container {
        margin-right: var(--spacing-md);
    }

    .footer-links {
        flex-grow: 1;
        justify-content: center;
    }

    .footer-links li {
        margin: 0 var(--spacing-sm);
    }

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

    .cookie-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .cookie-buttons {
        margin-top: 10px;
        width: 100%;
        justify-content: space-between;
    }

    .cookie-btn {
        flex: 1;
        text-align: center;
        font-size: 0.9rem;
        padding: 10px 8px;
    }
}

/* Small Mobile Devices */
@media screen and (max-width: 480px) {
    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero h1 {
        font-size: 2rem;
        max-width: 100%;
        padding: 0 10px;
        word-wrap: break-word;
        hyphens: auto;
    }

    .hero p {
        font-size: 1rem;
        word-wrap: break-word;
        hyphens: auto;
    }

    .page-title {
        padding: 2.5rem var(--spacing-md);
    }

    .page-title h1 {
        font-size: 2rem;
    }

    .page-title p {
        font-size: 1rem;
    }

    .btn {
        padding: 0.7rem 1.4rem;
        font-size: 0.9rem;
        width: 90%;
    }

    .feature-card h3 {
        font-size: 0.95rem;
    }

    .feature-card h3 span {
        width: 25px;
        height: 25px;
        font-size: 0.9rem;
    }

    .review-card {
        padding: 1.5rem;
    }

    .review-stars {
        font-size: 1rem;
    }

    .footer-links {
        flex-direction: column;
        align-items: center;
    }

    .footer-links li {
        margin: 0.3rem 0;
    }

    .social-icons a {
        font-size: 1.5rem;
        margin: 0 var(--spacing-sm);
    }

    .book-image {
        max-width: 280px;
    }

    .slider-arrow {
        width: 32px;
        height: 32px;
    }

    .newsletter-form {
        width: 95%;
    }

    .faq-question {
        font-size: 0.95rem;
        padding: 0.8rem;
    }

    .chapter-item {
        padding: 0.8rem;
    }

    section {
        padding: 2.5rem 0;
    }

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

    .answer-btn {
        padding: var(--spacing-md) 0.8rem;
        min-height: 60px;
    }
}

/* Very Small Mobile Devices */
@media screen and (max-width: 360px) {
    .hero h1 {
        font-size: 1.8rem;
        max-width: 100%;
        padding: 0 10px;
    }

    .btn {
        font-size: 0.85rem;
        width: 95%;
    }

    .book-image {
        max-width: 220px;
    }

    .review-card {
        padding: 1.2rem;
    }

    .slider-arrow {
        width: 28px;
        height: 28px;
    }
}

/* ==========================================================================
   Legal Pages (Impressum, Datenschutz)
   ========================================================================== */

.legal-page {
    padding: 20px;
}

.legal-page .container {
    max-width: 900px;
    padding: var(--spacing-lg);
    background-color: var(--light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.legal-page h1 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.legal-page h2 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--secondary);
    padding-bottom: var(--spacing-sm);
    text-align: left;
}

.legal-page h3 {
    color: var(--secondary);
    margin: 1.5rem 0 var(--spacing-sm) 0;
}

.legal-page p {
    margin-bottom: var(--spacing-md);
}

.legal-page a {
    color: var(--primary);
    transition: color var(--transition-fast);
}

.legal-page a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

.legal-section {
    margin-bottom: 2.5rem;
}

.contact-info {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: #f9f9f9;
    border-left: 4px solid var(--primary);
}

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

.contact-info p:last-child {
    margin-bottom: 0;
}

.back-to-home {
    display: inline-block;
    margin: var(--spacing-lg) 0 0 0;
    padding: 0.8rem 1.8rem;
    background-color: var(--primary);
    color: var(--light);
    border-radius: var(--radius-sm);
    font-weight: bold;
    transition: all var(--transition-fast);
}

.back-to-home:hover {
    background-color: var(--secondary);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    text-decoration: none;
}

/* Print Styles */
@media print {
    header,
    footer,
    .mobile-menu-toggle,
    .cookie-consent {
        display: none !important;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    a {
        text-decoration: underline;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}