/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #50C878;
    --accent-color: #FF6B6B;
    --dark-color: #2C3E50;
    --light-color: #ECF0F1;
    --text-color: #333;
    --gray-color: #7F8C8D;
    --white: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    background: var(--light-color);
    padding: 0.8rem 0;
    font-size: 0.9rem;
}

.breadcrumb {
    display: flex;
    list-style: none;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin-left: 0.5rem;
    color: var(--gray-color);
    font-size: 1.2rem;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: var(--dark-color);
    text-decoration: underline;
}

.breadcrumb li[aria-current="page"] {
    color: var(--gray-color);
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-brand-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-brand-link:hover {
    color: var(--dark-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #357ABD 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-answer {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid rgba(255, 255, 255, 0.5);
}

.hero-answer strong {
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 3rem;
    opacity: 0.9;
}

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

.stat-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    min-width: 150px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Section Styles */
.section {
    padding: 4rem 0;
}

.section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-intro {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray-color);
    margin-bottom: 3rem;
}

.section-icon {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Video Section */
.video-section {
    background: var(--white);
}

.video-container {
    max-width: 1100px;
    margin: 3rem auto;
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-highlights {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
}

.video-highlights h3 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--white);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.highlight-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.video-cta {
    background: #E8F4F8;
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 5px;
    margin-top: 1.5rem;
}

.video-cta p {
    margin: 0;
}

.video-cta-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid var(--primary-color);
    transition: all 0.3s ease;
}

.video-cta-link:hover {
    color: var(--dark-color);
    border-bottom-color: var(--dark-color);
}

.video-resources {
    margin-top: 3rem;
}

.video-resources h3 {
    text-align: center;
    color: var(--dark-color);
    margin-bottom: 2rem;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.resource-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.resource-card h4 {
    color: var(--white);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.resource-card p {
    opacity: 0.95;
    line-height: 1.6;
}

/* Introduction Section */
.introduction-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.intro-content p {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.intro-quote {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 1.5rem 2rem;
    margin-top: 2rem;
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow);
}

.intro-quote p {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #495057;
}

.intro-quote strong {
    color: #0c5460;
}

/* Quick Answer Section */
.quick-answer {
    background-color: var(--light-color);
}

.answer-box {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin: 2rem 0;
}

.answer-box ol {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.answer-box li {
    margin: 1rem 0;
    line-height: 1.8;
}

.info-box {
    background: #E8F4F8;
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 5px;
    margin: 2rem 0;
}

.info-box.special {
    background: #FFF9E6;
    border-left-color: #FFD700;
}

/* Stats Section */
.stats-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.stats-section h2 {
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.stat-item h3 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* Pillars Section */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pillar-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid var(--primary-color);
}

.pillar-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pillar-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    text-align: center;
    line-height: 50px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pillar-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

/* Steps Section */
.steps-section {
    background-color: var(--light-color);
}

.steps-container {
    margin-top: 3rem;
}

.step-card {
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.step-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.step-number {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-header h3 {
    font-size: 1.5rem;
    margin: 0;
}

.step-content {
    padding: 2rem;
}

.step-content ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.step-content li {
    margin: 0.5rem 0;
}

.step-tip,
.step-warning {
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
}

.step-tip {
    background: #E8F8F5;
    border-left: 4px solid var(--secondary-color);
}

.step-warning {
    background: #FFF3CD;
    border-left: 4px solid #FFB347;
}

.conversation-starters {
    background: #F8F9FA;
    padding: 1.5rem;
    border-radius: 5px;
    margin-top: 1rem;
}

.conversation-starters h4 {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.comparison-bad,
.comparison-good {
    padding: 1rem;
    border-radius: 5px;
}

.comparison-bad {
    background: #FFE5E5;
    border-left: 4px solid var(--accent-color);
}

.comparison-good {
    background: #E8F8F5;
    border-left: 4px solid var(--secondary-color);
}

/* Adults Section */
.adults-section {
    background: var(--white);
}

.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.challenge-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.challenge-card h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.dos-donts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.dos,
.donts {
    background: var(--white);
    padding: 1rem;
    border-radius: 5px;
}

.dos {
    border-left: 4px solid var(--secondary-color);
}

.donts {
    border-left: 4px solid var(--accent-color);
}

.tip-text {
    margin-top: 1rem;
    font-style: italic;
    color: var(--gray-color);
}

/* Book Recommendation */
.book-recommendation {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 3rem;
    border-radius: 10px;
    margin-top: 3rem;
    text-align: center;
}

.book-recommendation h3 {
    color: var(--white);
    margin-bottom: 1rem;
}

.book-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 10px;
    margin-top: 1.5rem;
}

.book-box h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-large {
    padding: 1rem 3rem;
    font-size: 1.1rem;
}

/* Teenagers Section */
.teenagers-section {
    background-color: var(--light-color);
}

.teen-challenges {
    margin-top: 3rem;
}

.challenge-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.challenge-item h4 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.teen-strategies {
    margin-top: 3rem;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.strategy-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.strategy-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.strategy-card h4 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

/* FAQ Section */
.faq-section {
    background: var(--white);
}

.faq-container {
    max-width: 900px;
    margin: 3rem auto 0;
}

.faq-item {
    background: var(--light-color);
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(74, 144, 226, 0.1);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
    padding: 0 1.5rem 1.5rem;
}

/* Book Classic Section */
.book-classic-section {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    padding: 4rem 0;
}

.book-classic-box {
    background: var(--white);
    border-radius: 15px;
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}

.book-classic-box h2 {
    color: var(--dark-color);
    margin-bottom: 2rem;
}

.book-classic-info h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.book-author {
    font-size: 1.2rem;
    color: var(--gray-color);
    margin-bottom: 1.5rem;
}

.book-highlights {
    margin: 2rem 0;
}

.book-highlights ul {
    margin-left: 1.5rem;
}

.book-highlights li {
    margin: 0.8rem 0;
    font-size: 1.1rem;
}

.book-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.book-stat {
    background: var(--light-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

/* Action Section */
.action-section {
    background-color: var(--light-color);
}

.action-phases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.phase-card {
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.phase-header {
    background: var(--secondary-color);
    color: var(--white);
    padding: 1.5rem;
    text-align: center;
}

.phase-number {
    display: block;
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.phase-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.phase-card ul {
    padding: 2rem;
    margin: 0;
    list-style: none;
}

.phase-card li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--light-color);
    position: relative;
    padding-left: 2rem;
}

.phase-card li:last-child {
    border-bottom: none;
}

.phase-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.next-step-box {
    background: var(--white);
    padding: 3rem;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    margin-top: 3rem;
    border-left: 5px solid var(--accent-color);
}

.next-step-box h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.action-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.action-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.action-checkbox:hover {
    background: #dce4e8;
}

.action-checkbox input[type="checkbox"] {
    margin-top: 4px;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.action-reminder {
    background: #FFF9E6;
    padding: 1.5rem;
    border-radius: 5px;
    border-left: 4px solid #FFD700;
}

/* Impressum Section */
.impressum-section {
    background: var(--light-color);
}

.impressum-content {
    max-width: 900px;
    margin: 2rem auto;
}

.author-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    text-align: center;
}

.author-info h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.author-info a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.author-info a:hover {
    text-decoration: underline;
}

.impressum-content > h3 {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin: 2rem 0 1.5rem;
    text-align: center;
}

.impressum-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.impressum-block {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.impressum-block h4 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.impressum-block p {
    line-height: 1.8;
    color: var(--text-color);
}

.impressum-block a {
    color: var(--primary-color);
    text-decoration: none;
}

.impressum-block a:hover {
    text-decoration: underline;
}

.impressum-block strong {
    color: var(--dark-color);
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.9;
}

.footer-note {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 1rem;
}

.footer-author {
    margin-top: 1.5rem;
    font-size: 0.95rem;
}

.footer-author a {
    color: var(--white);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: border-color 0.3s ease;
}

.footer-author a:hover {
    border-bottom-color: var(--white);
}

.footer-links {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    margin: 0 0.5rem;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .breadcrumb {
        font-size: 0.8rem;
    }

    .video-wrapper {
        border-radius: 10px;
    }

    .video-highlights {
        padding: 1.5rem;
    }

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

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section h2 {
        font-size: 2rem;
    }

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

    .dos-donts {
        grid-template-columns: 1fr;
    }

    .book-classic-box {
        padding: 2rem 1.5rem;
    }

    .stats-grid,
    .pillars-grid,
    .challenge-grid,
    .strategy-grid,
    .action-phases {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        align-items: stretch;
    }

    .stat-card {
        min-width: auto;
    }

    .book-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--white);
}