/* SelvexisSignal Design System: Algorithmische Stille */
:root {
    --bg: #0a0b0e;
    --surface: #4a5568;
    --ink: #d4cfc7;
    --accent: #8b9d83;
    --sub: #e8e0d5;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --font-serif: 'Playfair Display', 'Times New Roman', serif;
    --font-mono: 'Courier New', Courier, monospace;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    --transition: 0.3s ease;
}

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

body {
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-mono);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover, a:focus {
    color: var(--sub);
    text-decoration: underline;
}

button {
    cursor: pointer;
    font-family: var(--font-mono);
    border: none;
    background: transparent;
    color: var(--ink);
    transition: all var(--transition);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--sub);
    color: var(--bg);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: rgba(139, 157, 131, 0.1);
    border-color: var(--sub);
    color: var(--sub);
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--ink);
    color: var(--ink);
}

.btn-outline:hover, .btn-outline:focus {
    background-color: rgba(212, 207, 199, 0.1);
    border-color: var(--sub);
}

/* Layout & Typography */
.site-layout {
    position: relative;
}

.site-layout::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--surface);
    opacity: 0.3;
    z-index: 1;
    transform: translateX(-50%);
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    color: var(--ink);
    line-height: 1.2;
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

h2 {
    font-size: 2.2rem;
    margin-bottom: var(--space-md);
    color: var(--accent);
}

h3 {
    font-size: 1.4rem;
    margin-bottom: var(--space-xs);
}

p {
    margin-bottom: var(--space-sm);
}

.lead {
    font-size: 1.1rem;
    max-width: 60ch;
}

.section-label {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: var(--space-xs);
    font-size: 0.9rem;
}

/* Scroll Progress */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background-color: var(--accent);
    width: 0%;
    z-index: 1001;
    transition: width 0.1s linear;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: rgba(10, 11, 14, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--surface);
    padding: var(--space-sm) 0;
}

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--ink);
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
}

.brand-logo svg {
    transition: transform var(--transition);
}

.brand-logo:hover svg {
    transform: rotate(5deg);
}

.main-nav ul {
    display: flex;
    gap: var(--space-md);
    list-style: none;
}

.main-nav a {
    color: var(--ink);
    font-size: 0.9rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-xs);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background-color: var(--ink);
    transition: all var(--transition);
}

/* Hero */
.hero-section {
    padding: var(--space-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.3;
}

.oscilloscope-svg {
    width: 100%;
    height: 100%;
}

.signal-path path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawSignal 3s ease-out forwards;
}

@keyframes drawSignal {
    to {
        stroke-dashoffset: 0;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-sub {
    font-size: 1.2rem;
    max-width: 60ch;
    margin-bottom: var(--space-md);
    color: var(--sub);
}

.hero-ctas {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* Stats */
.stats-section {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--surface);
    border-bottom: 1px solid var(--surface);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-family: var(--font-serif);
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Sections */
.about-section, .process-section, .features-section, .benefits-section, .testimonials-section, .faq-section, .contact-section {
    padding: var(--space-xl) 0;
}

.about-section:nth-child(odd), .features-section:nth-child(odd) {
    background-color: rgba(74, 85, 104, 0.1);
}

.content-visual {
    margin-top: var(--space-md);
    padding-left: var(--space-md);
    border-left: 2px solid var(--accent);
}

.timeline-marker {
    position: absolute;
    left: calc(50% + 1px);
    top: 0;
    bottom: 0;
    width: 2px;
    background: repeating-linear-gradient(to bottom, var(--accent) 0, var(--accent) 10px, transparent 10px, transparent 20px);
    z-index: 1;
}

/* Process */
.process-steps {
    display: grid;
    gap: var(--space-md);
}

.step {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--space-sm);
    padding: var(--space-md);
    background-color: rgba(74, 85, 104, 0.2);
    border: 1px solid var(--surface);
    border-radius: var(--radius-md);
}

.step-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--accent);
    opacity: 0.6;
}

/* Features & Benefits */
.features-grid, .benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.feature-card, .benefit-item {
    padding: var(--space-md);
    border: 1px solid var(--surface);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.feature-card:hover, .benefit-item:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.feature-icon, .benefit-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-sm);
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.testimonial-card {
    padding: var(--space-md);
    background-color: rgba(74, 85, 104, 0.15);
    border-radius: var(--radius-md);
}

.stars {
    color: var(--accent);
    margin-bottom: var(--space-xs);
}

.testimonial-quote {
    font-style: italic;
    margin-bottom: var(--space-sm);
    color: var(--sub);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.avatar {
    width: 40px;
    height: 40px;
    background-color: var(--accent);
    color: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    color: var(--ink);
}

.author-info span {
    font-size: 0.8rem;
    color: var(--surface);
}

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

.faq-item {
    border-bottom: 1px solid var(--surface);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: var(--space-md) 0;
    font-size: 1.1rem;
    color: var(--ink);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent);
    transition: transform var(--transition);
}

.faq-question[aria-expanded="true"]::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-answer p {
    padding-bottom: var(--space-md);
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-field {
    margin-bottom: var(--space-md);
}

.form-field label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--accent);
}

.form-field input {
    width: 100%;
    padding: 0.8rem;
    background-color: rgba(74, 85, 104, 0.2);
    border: 1px solid var(--surface);
    color: var(--ink);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.form-field input:focus {
    outline: none;
    border-color: var(--accent);
}

.field-error {
    color: #ff6b6b;
    font-size: 0.8rem;
    display: block;
    margin-top: 4px;
}

/* CTA Banner */
.cta-banner {
    padding: var(--space-xl) 0;
    text-align: center;
    background-color: rgba(139, 157, 131, 0.1);
    border-top: 1px solid var(--surface);
}

.cta-banner h2 {
    margin-bottom: var(--space-md);
}

/* Footer */
.site-footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--surface);
    background-color: rgba(10, 11, 14, 1);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.footer-brand address {
    font-style: normal;
    margin-top: var(--space-sm);
    color: var(--surface);
}

.footer-nav ul, .footer-info ul, .footer-legal ul {
    list-style: none;
    margin-top: var(--space-sm);
}

.footer-nav li, .footer-info li, .footer-legal li {
    margin-bottom: var(--space-xs);
}

.footer-bottom {
    margin-top: var(--space-lg);
    text-align: center;
    color: var(--surface);
    font-size: 0.8rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    border-top: 1px solid var(--accent);
    padding: var(--space-sm) 0;
    z-index: 999;
    display: none;
}

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

.cookie-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
}

/* Legal Pages */
.legal-page {
    padding: var(--space-xl) 0;
}

.legal-effective {
    color: var(--surface);
    margin-bottom: var(--space-md);
}

.legal-content h2 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.legal-content p {
    max-width: 80ch;
}

.legal-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-md);
}

.legal-table th, .legal-table td {
    padding: var(--space-sm);
    border: 1px solid var(--surface);
    text-align: left;
}

.legal-table th {
    background-color: rgba(74, 85, 104, 0.3);
}

.legal-contact {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--surface);
}

/* Thank You */
.thank-you-section {
    padding: var(--space-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.thank-you-card {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-md);
}

.thank-you-text {
    margin-bottom: var(--space-md);
}

/* Breadcrumbs */
.breadcrumbs {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--surface);
}

.breadcrumbs ul {
    list-style: none;
    display: flex;
    gap: var(--space-xs);
    font-size: 0.9rem;
}

.breadcrumbs .current {
    color: var(--surface);
}

/* Signature: Signal Marker */
.signal-marker {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    z-index: 998;
    pointer-events: none;
}

.signal-marker::after {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 10px;
    background-color: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
}

/* Signature: Dynamic Divider */
.dynamic-divider {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.1;
}

/* Signature: Coordinate Overlay */
.coordinate-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    transition: background-color 0.5s ease;
}

/* Fade Up Animation */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible, .fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-visual {
        display: none;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg);
        padding: var(--space-md);
        border-bottom: 1px solid var(--surface);
        display: none;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .hero-ctas {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .site-layout::after {
        left: 20px;
    }

    .content-visual {
        padding-left: var(--space-sm);
    }

    .timeline-marker {
        left: 20px;
    }

    .cookie-banner .container {
        flex-direction: column;
    }

    .hero-section {
        padding: var(--space-lg) 0;
    }
}

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