/* ============================================
   FRONTIER ENTERPRISES — Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500&family=Space+Grotesk:wght@300;400;500&display=swap');

:root {
    --bg: #0b0a09;
    --bg-warm: #100e0c;
    --bg-elevated: #161412;
    --text: #d4cfc8;
    --text-muted: #7a7570;
    --text-dim: #4a4540;
    --accent: #c4704b;
    --accent-light: #d4896a;
    --accent-dim: rgba(196, 112, 75, 0.15);
    --white: #f0ece6;
    --border: #1f1c19;
    --font-body: 'Space Grotesk', -apple-system, sans-serif;
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --max-width: 1200px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    --space-2xl: 12rem;
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    background-color: var(--bg);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-light);
}

strong {
    font-weight: 500;
    color: var(--white);
}

em {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--accent-light);
}

::selection {
    background: var(--accent);
    color: var(--bg);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.75rem var(--space-md);
    transition: all 0.4s ease;
}

.nav.scrolled {
    background: rgba(11, 10, 9, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem var(--space-md);
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--white);
}

.nav-dot {
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    margin: 0 0.5rem;
    vertical-align: middle;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

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

/* ============================================
   Hero
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding: 0 var(--space-md) var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 70% 40%, rgba(196, 112, 75, 0.08), transparent),
        radial-gradient(ellipse 60% 50% at 20% 60%, rgba(100, 60, 30, 0.06), transparent);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 900px;
    animation: heroFadeIn 1.2s ease both;
}

.hero-label {
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 9vw, 7rem);
    font-weight: 300;
    line-height: 1.05;
    color: var(--white);
    margin-bottom: var(--space-md);
}

.hero-title i {
    font-style: italic;
    color: var(--accent);
}

.hero-sub {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 500px;
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--white);
    padding: 0;
    border: none;
    background: none;
    transition: color 0.3s ease;
}

.hero-cta::after {
    content: '';
    display: inline-block;
    width: 40px;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.hero-cta:hover {
    color: var(--accent);
}

.hero-cta:hover::after {
    width: 60px;
}

.scroll-indicator {
    position: absolute;
    right: var(--space-md);
    bottom: var(--space-lg);
    writing-mode: vertical-rl;
    font-size: 0.6rem;
    font-weight: 400;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: heroFadeIn 1.2s ease 0.5s both;
}

.scroll-indicator::after {
    content: '';
    display: block;
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--accent), transparent);
}

/* ============================================
   Sections (shared)
   ============================================ */

.section {
    padding: var(--space-2xl) 0;
    position: relative;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease, transform 1s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-label {
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-lg);
}

.section-divider {
    width: 100%;
    height: 1px;
    background: var(--border);
}

/* ============================================
   Statement (full-width text section)
   ============================================ */

.statement {
    padding: var(--space-2xl) var(--space-md);
    position: relative;
}

.statement::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 50% 50% at 50% 50%, rgba(196, 112, 75, 0.04), transparent);
    pointer-events: none;
}

.statement-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.statement-text {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 300;
    line-height: 1.3;
    color: var(--white);
    max-width: 950px;
}

.statement-text i {
    font-style: italic;
    color: var(--accent);
}

/* ============================================
   Product
   ============================================ */

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.product-main p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

.product-main p:last-child {
    margin-bottom: 0;
}

.product-aside {
    padding-top: 0.5rem;
}

.product-aside-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 300;
    font-style: italic;
    color: var(--accent);
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.product-aside p {
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.7;
}

/* ============================================
   Features
   ============================================ */

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.feature {
    padding: var(--space-lg) var(--space-md);
    background: var(--bg);
    transition: background 0.4s ease;
}

.feature:hover {
    background: var(--bg-elevated);
}

.feature-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--accent-dim);
    line-height: 1;
    margin-bottom: var(--space-sm);
    transition: color 0.4s ease;
}

.feature:hover .feature-number {
    color: var(--accent);
}

.feature h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--white);
    margin-bottom: 0.75rem;
}

.feature p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================
   Science
   ============================================ */

.science-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.science-block {
    padding: var(--space-lg);
    border-left: 1px solid var(--accent);
    background: linear-gradient(135deg, var(--accent-dim), transparent);
}

.science-block h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--white);
    margin-bottom: var(--space-sm);
}

.science-block p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* ============================================
   CTA / Early Access
   ============================================ */

.cta-section {
    padding: var(--space-2xl) var(--space-md);
    text-align: center;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 40% at 50% 60%, rgba(196, 112, 75, 0.06), transparent);
    pointer-events: none;
}

.cta-inner {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    margin: 0 auto var(--space-lg);
}

.cta-heading {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 300;
    color: var(--white);
    margin-bottom: var(--space-sm);
    line-height: 1.15;
}

.cta-heading i {
    font-style: italic;
    color: var(--accent);
}

.cta-sub {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.cta-counter {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 0.6rem 1.5rem;
    border: 1px solid rgba(196, 112, 75, 0.3);
    margin-bottom: var(--space-lg);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    padding: 1.1rem 3rem;
    border: none;
    transition: all 0.4s ease;
}

.cta-button:hover {
    background: var(--white);
    color: var(--bg);
}

.cta-button svg {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.cta-button:hover svg {
    transform: translateX(4px);
}

.cta-privacy {
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-top: var(--space-sm);
    letter-spacing: 0.05em;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--border);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

.footer a {
    color: var(--text-dim);
    transition: color 0.3s ease;
}

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

/* ============================================
   Animations
   ============================================ */

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-grid,
    .science-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .hero {
        padding-bottom: var(--space-xl);
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 600px) {
    :root {
        --space-xl: 5rem;
        --space-2xl: 7rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .nav-links a.nav-hide-mobile {
        display: none;
    }

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

    .hero {
        align-items: center;
        padding-bottom: var(--space-lg);
    }

    .cta-button {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }
}