:root {
    --bg: #0f1115;
    --surface: #eaeaea;
    --ink: #ff5e5e;
    --accent: #2d4a61;
    --secondary: #f9f5f0;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-sans: 'Unbounded', 'Arial Black', sans-serif;
    --radius: 8px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

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

a:hover {
    color: var(--secondary);
}

h1, h2, h3, h4 {
    font-family: var(--font-sans);
    color: var(--surface);
    margin-bottom: 16px;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    margin-top: 64px;
}

h3 {
    font-size: 1.5rem;
    color: var(--ink);
}

p {
    margin-bottom: 16px;
    max-width: 70ch;
}

.section-title {
    text-align: left;
    margin-bottom: 48px;
    color: var(--secondary);
    border-left: 4px solid var(--ink);
    padding-left: 16px;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(15, 17, 21, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 16px 24px;
    border-bottom: 1px solid var(--accent);
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

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

.brand-logo {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    color: var(--surface);
    font-weight: 700;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--surface);
    margin: 5px 0;
    transition: var(--transition);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

.main-nav a {
    color: var(--secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.main-nav a.active, .main-nav a:hover {
    color: var(--ink);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    width: 100%;
}

.hero-silence {
    background-color: var(--bg);
    padding: 48px;
    z-index: 2;
}

.kinetic-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-family: var(--font-sans);
    color: var(--surface);
    letter-spacing: -0.05em;
    transform-origin: left center;
    transition: transform 0.1s linear;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--secondary);
    margin: 32px 0 48px;
    max-width: 60ch;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid var(--ink);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--surface);
}

.btn-secondary:hover {
    background-color: var(--accent);
    color: var(--surface);
    border-color: var(--accent);
}

.hero-signal {
    position: relative;
    height: 50vh;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-visual {
    width: 100%;
    max-width: 500px;
}

.pulse-ring {
    animation: pulse 3s infinite alternate;
    transform-origin: 200px 200px;
}

.signal-line {
    animation: draw 4s infinite alternate ease-in-out;
}

@keyframes pulse {
    0% { opacity: 0.3; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1.05); }
}

@keyframes draw {
    0% { stroke-dasharray: 1000; stroke-dashoffset: 1000; }
    100% { stroke-dasharray: 1000; stroke-dashoffset: 0; }
}

/* Stats */
.stats-section {
    padding: 64px 0;
    background-color: var(--surface);
    color: var(--bg);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-sans);
    font-size: 3rem;
    color: var(--ink);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* About / Fibonacci */
.about-section {
    padding: 96px 0;
    background-color: var(--bg);
    position: relative;
}

.about-fibonacci {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.fib-block {
    background-color: rgba(45, 74, 97, 0.2);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
}

.fib-block h2 {
    color: var(--secondary);
}

.fib-block h3 {
    color: var(--ink);
}

/* Process */
.process-section {
    padding: 96px 0;
    background-color: var(--bg);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.step {
    position: relative;
    padding: 32px;
    background-color: rgba(234, 234, 234, 0.05);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
}

.step-number {
    font-family: var(--font-sans);
    font-size: 4rem;
    color: var(--accent);
    opacity: 0.5;
    margin-bottom: 16px;
}

/* Features */
.features-section {
    padding: 96px 0;
    background-color: var(--bg);
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background-color: rgba(45, 74, 97, 0.1);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
    transition: var(--transition);
}

.feature-card:hover {
    background-color: rgba(45, 74, 97, 0.2);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
    color: var(--ink);
}

/* Benefits */
.benefits-section {
    padding: 96px 0;
    background-color: var(--bg);
}

.benefit-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.benefit-card {
    background-color: rgba(234, 234, 234, 0.05);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
}

.benefit-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
    color: var(--ink);
}

/* Testimonials */
.testimonials-section {
    padding: 96px 0;
    background-color: var(--bg);
}

.testimonial-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background-color: rgba(45, 74, 97, 0.1);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
}

.stars {
    color: var(--ink);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.testimonial-card blockquote {
    font-style: italic;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-initial {
    width: 40px;
    height: 40px;
    background-color: var(--ink);
    color: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-sans);
    font-weight: 700;
}

.author-info strong {
    display: block;
    color: var(--surface);
}

.author-info span {
    color: var(--secondary);
    font-size: 0.85rem;
}

/* FAQ */
.faq-section {
    padding: 96px 0;
    background-color: var(--bg);
}

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

.faq-item {
    margin-bottom: 16px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 24px;
    text-align: left;
    font-family: var(--font-sans);
    font-size: 1.1rem;
    color: var(--surface);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.faq-question[aria-expanded="true"]::after {
    content: '-';
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: rgba(45, 74, 97, 0.1);
}

.faq-answer p {
    padding: 24px;
}

/* Contact */
.contact-section {
    padding: 96px 0;
    background-color: var(--bg);
}

.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background-color: rgba(234, 234, 234, 0.1);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    color: var(--surface);
    font-family: var(--font-mono);
}

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

.field-error {
    color: var(--ink);
    font-size: 0.85rem;
    display: none;
}

.form-group.has-error .field-error {
    display: block;
}

.form-group.has-error input {
    border-color: var(--ink);
}

/* CTA Banner */
.cta-banner {
    padding: 96px 0;
    background-color: var(--surface);
    color: var(--bg);
    text-align: center;
}

.cta-banner h2 {
    color: var(--bg);
    margin-bottom: 32px;
}

.cta-banner .btn-primary {
    background-color: var(--ink);
    color: var(--bg);
    border-color: var(--ink);
}

.cta-banner .btn-secondary {
    background-color: transparent;
    color: var(--bg);
    border-color: var(--bg);
}

.cta-banner .btn-secondary:hover {
    background-color: var(--bg);
    color: var(--surface);
    border-color: var(--bg);
}

/* Signal Sensor */
.signal-sensor {
    padding: 96px 0;
    background-color: var(--bg);
    text-align: center;
}

.signal-sensor h3 {
    color: var(--surface);
}

.signal-sensor p {
    margin: 0 auto 32px;
    color: var(--secondary);
}

.oscillograph {
    width: 100%;
    max-width: 800px;
    height: 200px;
    cursor: crosshair;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
}

.sensor-grid {
    opacity: 0.3;
}

.signal-wave {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 0.5s ease;
}

/* Footer */
.site-footer {
    background-color: var(--bg);
    border-top: 1px solid var(--accent);
    padding: 64px 0 32px;
}

.footer-col {
    margin-bottom: 32px;
}

.footer-col h4 {
    color: var(--ink);
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a {
    color: var(--secondary);
}

.brand-logo-footer {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    color: var(--surface);
    font-weight: 700;
    margin-bottom: 16px;
    display: block;
}

.footer-bottom {
    border-top: 1px solid var(--accent);
    padding-top: 32px;
    text-align: center;
    color: var(--secondary);
    font-size: 0.85rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    border-top: 1px solid var(--accent);
    padding: 16px 24px;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cookie-banner p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--secondary);
}

.cookie-actions {
    display: flex;
    gap: 16px;
}

/* Legal Pages */
.legal-page {
    padding-top: 120px;
    padding-bottom: 64px;
}

.breadcrumb {
    margin-bottom: 32px;
    font-size: 0.9rem;
    color: var(--secondary);
}

.breadcrumb .separator {
    margin: 0 8px;
    color: var(--accent);
}

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

.legal-page-intro h1 {
    margin-top: 0;
}

.effective-date {
    color: var(--ink);
    margin-bottom: 24px;
}

.legal-section {
    margin-bottom: 48px;
}

.legal-section h2 {
    color: var(--surface);
    margin-top: 0;
}

.cookie-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    font-size: 0.9rem;
}

.cookie-table th, .cookie-table td {
    padding: 12px;
    border: 1px solid var(--accent);
    text-align: left;
}

.cookie-table th {
    background-color: rgba(45, 74, 97, 0.2);
    color: var(--ink);
}

/* About Page Specifics */
.breadcrumb-section {
    padding: 120px 0 32px;
    background-color: var(--bg);
}

.about-hero {
    padding: 48px 0 96px;
    background-color: var(--bg);
    text-align: center;
}

.pill-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--accent);
    color: var(--secondary);
    border-radius: 16px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.about-hero-visual {
    margin: 48px auto;
    max-width: 400px;
}

.about-content {
    padding: 96px 0;
    background-color: var(--bg);
}

.reversed-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 96px;
}

.asymmetric-anchor {
    width: 100%;
    max-width: 400px;
}

.team-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-card {
    background-color: rgba(45, 74, 97, 0.1);
    padding: 24px;
    border-radius: var(--radius);
}

.value-card h4 {
    color: var(--secondary);
    margin-bottom: 8px;
}

/* Thank You Page */
.thank-you-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 64px;
    background-color: var(--bg);
}

.thank-you-card {
    background-color: rgba(45, 74, 97, 0.1);
    padding: 64px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
    text-align: center;
    max-width: 600px;
    width: 100%;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 32px;
}

.thank-you-card h1 {
    color: var(--surface);
    margin-bottom: 24px;
}

.thank-you-card p {
    margin-bottom: 32px;
}

/* 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) {
    .container {
        padding: 0 16px;
    }

    .menu-toggle {
        display: block;
        z-index: 1001;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background-color: var(--bg);
        flex-direction: column;
        padding: 80px 24px;
        transition: right 0.3s ease;
        box-shadow: -10px 0 20px rgba(0, 0, 0, 0.5);
    }

    .main-nav.active {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 24px;
    }

    .hero-split {
        grid-template-columns: 1fr;
    }

    .hero-silence {
        padding: 24px;
    }

    .hero-signal {
        height: 300px;
    }

    .stats-container,
    .process-steps,
    .feature-cards,
    .benefit-cards,
    .testimonial-cards,
    .team-values {
        grid-template-columns: 1fr;
    }

    .about-fibonacci,
    .reversed-layout {
        grid-template-columns: 1fr;
    }

    .cookie-banner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .cookie-actions {
        justify-content: center;
    }

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

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}