/* CSS Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --primary-light: #60a5fa;
    --primary-lighter: #93c5fd;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

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

.nav-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.nav-menu a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-motto {
    margin: 3rem 0;
    padding: 2rem;
    border-left: 2px solid var(--primary-color);
    background-color: var(--bg-light);
}

.motto-text {
    font-size: 1.5rem;
    font-weight: 300;
    font-style: italic;
    color: var(--primary-color);
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.cta-button:hover {
    background-color: transparent;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Methode Section */
.methode {
    background-color: var(--bg-white);
}

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

.principle-card {
    padding: 2.5rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    text-align: center;
}

.principle-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    border-color: var(--primary-light);
}

.principle-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-white);
    border-radius: 50%;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.principle-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.principle-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Plan Section */
.plan {
    background-color: var(--bg-light);
}

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

.plan-item {
    padding: 2.5rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.plan-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.plan-percentage {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.plan-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.plan-description {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.plan-list {
    list-style: none;
    padding: 0;
}

.plan-list li {
    padding: 0.5rem 0;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.plan-list li:last-child {
    border-bottom: none;
}

.plan-list li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    display: inline-block;
    width: 1.5rem;
}

/* Rechner Section */
.rechner {
    background-color: var(--bg-white);
}

.calculator-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.calculator-input {
    margin-bottom: 2rem;
}

.calculator-input label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1.1rem;
}

.calculator-input input {
    width: 100%;
    padding: 1rem;
    font-size: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-white);
    color: var(--text-dark);
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.calculator-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.calculate-button {
    width: 100%;
    padding: 1rem;
    margin-top: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.calculate-button:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(59, 130, 246, 0.3);
}

.calculator-results {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.result-item {
    margin-bottom: 2rem;
}

.result-item:last-child {
    margin-bottom: 0;
}

.result-label {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

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

.result-bar-fill {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.5s ease;
    border-radius: 4px;
}

/* FAQ Section */
.faq {
    background-color: var(--bg-light);
}

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

.faq-item {
    margin-bottom: 1rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
    font-weight: 300;
}

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

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

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-gray);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: var(--text-light);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    color: var(--primary-light);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--primary-light);
}

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

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 0.75rem;
        font-size: 0.8rem;
    }

    .nav-menu a {
        font-size: 0.8rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .motto-text {
        font-size: 1.2rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

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

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

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

    .step-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .step-number {
        margin: 0 auto;
    }

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

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

    .calculator-container {
        padding: 2rem 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .nav-brand {
        font-size: 1.25rem;
    }

    .nav-menu {
        gap: 0.75rem;
        font-size: 0.8rem;
    }

    .calculator-container {
        padding: 1.5rem 1rem;
    }

    .result-value {
        font-size: 1.5rem;
    }
}

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-gray);
    line-height: 1.5;
}

/* Benefits Section */
.benefits {
    background-color: var(--bg-white);
}

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

.benefit-card {
    padding: 2rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    border-color: var(--primary-light);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-white);
    border-radius: 50%;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.benefit-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.benefit-description {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* How It Works Section */
.how-it-works {
    background-color: var(--bg-light);
}

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

.step-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.step-item:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transform: translateX(5px);
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.75rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.step-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Tips Section */
.tips {
    background-color: var(--bg-white);
}

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

.tip-card {
    padding: 2rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tip-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.tip-number {
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 5rem;
    font-weight: 700;
    color: var(--primary-lighter);
    opacity: 0.3;
    line-height: 1;
}

.tip-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
    position: relative;
    z-index: 1;
}

.tip-description {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

/* Testimonials Section */
.testimonials {
    background-color: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    padding: 2.5rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.testimonial-quote {
    position: absolute;
    top: 1rem;
    left: 1.5rem;
    font-size: 5rem;
    color: var(--primary-lighter);
    opacity: 0.3;
    line-height: 1;
    font-family: Georgia, serif;
}

.testimonial-text {
    color: var(--text-dark);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
    padding-top: 1rem;
}

.testimonial-author {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.author-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.author-detail {
    font-size: 0.9rem;
    color: var(--text-gray);
}

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