:root {
    /* Dark aesthetic inspired by data viz reference */
    --charcoal: #1a1a1a;
    --charcoal-light: #2a2a2a;
    --charcoal-lighter: #3a3a3a;
    --white: #FFFFFF;
    --gray: #999999;
    --gray-dark: #666666;
    --gold: #D4A574;
    --gold-muted: rgba(212, 165, 116, 0.6);
    --transition: all 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
    /* Fonts: Charcoal - Modern geometric + elegant serif */
    --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
}

/* Color Scheme: Midnight (Deep Blue Dark) */
[data-theme="midnight"] {
    --charcoal: #0a0e1a;
    --charcoal-light: #141a2e;
    --charcoal-lighter: #1e2742;
    --white: #FFFFFF;
    --gray: #8b9cb6;
    --gray-dark: #5a6a85;
    --gold: #7aa3cc;
    --gold-muted: rgba(122, 163, 204, 0.6);
    /* Fonts: Midnight - Clean tech + refined editorial */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Cormorant Garamond', Georgia, serif;
}

/* Color Scheme: Forest (Original Light with Dark Mode) */
[data-theme="forest"] {
    --charcoal: #0d1a0f;
    --charcoal-light: #1a2b1d;
    --charcoal-lighter: #273d2a;
    --white: #FFFFFF;
    --gray: #a8bfae;
    --gray-dark: #6b8771;
    --gold: #a8d5a8;
    --gold-muted: rgba(168, 213, 168, 0.6);
    /* Fonts: Forest - Soft rounded + classic natural */
    --font-body: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Libre Baskerville', Georgia, serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--charcoal);
    color: var(--white);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 24px;
    display: block;
}

.section-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.4em;
    color: var(--gold);
    display: block;
    text-align: center;
    margin-bottom: 16px;
    font-weight: 600;
}

h1, h2 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.1;
}

h1 i, h2 i {
    font-style: italic;
    color: var(--gold);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 30px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray);
    font-size: 0.9rem;
    font-weight: 400;
    transition: var(--transition);
}

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

.nav-cta {
    background: var(--white);
    color: var(--charcoal) !important;
    padding: 10px 24px;
    border-radius: 4px;
}

.nav-cta:hover {
    background: var(--gray);
    color: var(--charcoal) !important;
}

/* Theme Switcher */
.theme-switcher {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background: var(--charcoal-light);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    gap: 8px;
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
}

.theme-option {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.theme-option:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.3);
}

.theme-option.active {
    border-color: var(--white);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.theme-option[data-theme="charcoal"] {
    background: linear-gradient(135deg, #1a1a1a 0%, #3a3a3a 100%);
}

.theme-option[data-theme="midnight"] {
    background: linear-gradient(135deg, #0a0e1a 0%, #1e2742 100%);
}

.theme-option[data-theme="forest"] {
    background: linear-gradient(135deg, #0d1a0f 0%, #273d2a 100%);
}

.theme-option::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--white);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.theme-option.active::after {
    opacity: 1;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    background: var(--charcoal);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(212, 165, 116, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    will-change: transform;
}

.hero-content h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 32px;
}

.manifesto {
    font-size: 1.25rem;
    font-weight: 300;
    margin-bottom: 48px;
    color: var(--gray);
    max-width: 500px;
    line-height: 1.7;
}

.cta-group {
    display: flex;
    gap: 20px;
}

.btn-primary {
    display: inline-block;
    background: var(--white);
    color: var(--charcoal);
    text-decoration: none;
    padding: 18px 36px;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--gray);
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    border: 1px solid var(--gray-dark);
    color: var(--white);
    text-decoration: none;
    padding: 18px 36px;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--white);
}

/* Hero Carousel */
.hero-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 40px 100px rgba(26, 43, 29, 0.15);
    will-change: transform;
}

.carousel-track {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.carousel-indicators .indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--white);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-indicators .indicator:hover {
    background: rgba(255, 255, 255, 0.5);
}

.carousel-indicators .indicator.active {
    background: var(--white);
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 40px 100px rgba(26, 43, 29, 0.15);
}

/* Social Proof Bar */
.social-proof {
    background: var(--charcoal-light);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 20px 40px;
}

.social-proof-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.proof-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.proof-item .stars {
    color: var(--gold);
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.proof-item .proof-text {
    font-size: 0.85rem;
    color: var(--gray);
    letter-spacing: 0.05em;
}

.proof-item .proof-text strong {
    color: var(--white);
    font-weight: 600;
}

.proof-divider {
    color: var(--gray-dark);
    font-size: 0.8rem;
}

/* Benefits */
.benefits {
    padding: 120px 0;
    background: var(--charcoal-light);
}

.benefits h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 80px;
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.benefit-card {
    padding: 60px 40px;
    background: var(--charcoal-lighter);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.1);
    background: var(--charcoal);
}

.benefit-image {
    width: 100%;
    height: 180px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 24px;
    will-change: transform;
    transition: transform 0.1s ease-out;
}

.benefit-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.benefit-card:hover .benefit-image img {
    transform: scale(1.05);
}

.benefit-card i {
    font-size: 40px;
    color: var(--gold);
    margin-bottom: 24px;
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--white);
}

.benefit-card p {
    color: var(--gray);
    margin-bottom: 16px;
}

.benefit-stat {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gold);
    font-weight: 600;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

/* Founder Quote */
.founder-quote {
    padding: 100px 40px;
    background: linear-gradient(135deg, var(--charcoal) 0%, var(--charcoal-light) 100%);
    position: relative;
    overflow: hidden;
}

.founder-quote::before {
    content: '"';
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(var(--parallax-offset, 0));
    font-family: var(--font-heading);
    font-size: 12rem;
    color: var(--gold-muted);
    opacity: 0.15;
    line-height: 1;
    pointer-events: none;
    will-change: transform;
    transition: transform 0.1s ease-out;
}

.founder-quote blockquote {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.founder-quote blockquote p {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-style: italic;
    font-weight: 400;
    line-height: 1.6;
    color: var(--white);
    margin-bottom: 32px;
}

.founder-quote blockquote cite {
    font-family: var(--font-body);
    font-style: normal;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.founder-photo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--gold-muted);
    margin-bottom: 8px;
}

.founder-name {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--white);
    font-weight: 600;
}

.founder-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gold);
    font-weight: 400;
}

/* Formula Section */
.formula {
    padding: 120px 0;
    background: var(--charcoal);
}

.formula-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.formula-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 40px 100px rgba(26, 43, 29, 0.1);
}

.formula-content h2 {
    font-size: 3rem;
    margin-bottom: 32px;
}

.formula-content p {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 32px;
    color: var(--gray);
}

/* Formula Comparison */
.formula-comparison {
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comparison-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.comparison-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gray);
    font-weight: 600;
}

.comparison-bar {
    display: flex;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
    background: var(--charcoal-lighter);
}

.bar-segment {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.bar-segment span {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 4px;
}

/* Typical skincare colors */
.bar-segment.water {
    background: rgba(100, 150, 200, 0.3);
    color: var(--gray);
}

.bar-segment.filler {
    background: rgba(100, 100, 100, 0.3);
}

.bar-segment.active {
    background: var(--gold-muted);
}

/* Oasis formula colors */
.bar-segment.botanical {
    background: rgba(168, 213, 168, 0.4);
    color: var(--white);
}

.bar-segment.active-oasis {
    background: var(--gold);
    color: var(--charcoal);
}

.bar-segment.delivery {
    background: rgba(255, 255, 255, 0.1);
}

.comparison-result {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-dark);
}

.comparison-result.highlight {
    color: var(--gold);
    font-weight: 600;
}

.formula-list {
    list-style: none;
    margin-bottom: 48px;
}

.formula-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-weight: 600;
}

.formula-list i {
    color: var(--gold);
}

/* FAQ Section */
.faq {
    padding: 120px 0;
    background: var(--charcoal-light);
}

.faq h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 80px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    padding: 40px;
    background: var(--charcoal);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--white);
    font-family: var(--font-heading);
}

.faq-item p {
    color: var(--gray);
    line-height: 1.7;
}

/* Final CTA */
.final-cta {
    padding: 100px 40px;
    background: linear-gradient(135deg, var(--charcoal) 0%, var(--charcoal-light) 100%);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.final-cta h2 {
    font-size: 3rem;
    margin-bottom: 24px;
}

.final-cta p {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 40px;
}

.final-cta .btn-primary {
    margin-bottom: 24px;
}

.guarantee-text {
    font-size: 0.9rem;
    color: var(--gold);
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Footer */
.footer {
    background: var(--charcoal-light);
    color: var(--gray);
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 80px;
    margin-bottom: 80px;
}

.footer-logo {
    font-size: 1.5rem;
    letter-spacing: 0.2rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-brand p {
    max-width: 300px;
    color: var(--gray-dark);
}

.footer-links h4, .footer-social h4 {
    margin-bottom: 24px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--white);
}

.footer-links a {
    display: block;
    color: var(--gray-dark);
    text-decoration: none;
    margin-bottom: 12px;
    transition: 0.3s;
}

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

.social-icons {
    display: flex;
    gap: 20px;
}

.social-icons a {
    font-size: 24px;
    color: var(--gray-dark);
    transition: 0.3s;
}

.social-icons a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.8rem;
    color: var(--gray-dark);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

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

/* Responsive */
@media (max-width: 992px) {
    .navbar { padding: 20px 40px; }
    .hero-container, .formula-container { grid-template-columns: 1fr; gap: 60px; text-align: center; }
    .hero-content { display: flex; flex-direction: column; align-items: center; }
    .manifesto { max-width: 100%; }
    .benefit-grid { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; gap: 40px; }

    /* Social Proof Bar - stack on mobile */
    .social-proof-content {
        flex-direction: column;
        gap: 12px;
    }
    .proof-divider {
        display: none;
    }

    /* Founder Quote - adjust sizing */
    .founder-quote {
        padding: 80px 24px;
    }
    .founder-quote::before {
        font-size: 8rem;
        top: 20px;
    }

    /* Benefits - adjust card layout */
    .benefit-card {
        display: flex;
        flex-direction: column;
    }

    /* Formula Comparison - mobile adjustments */
    .formula-comparison {
        margin-bottom: 32px;
    }
    .comparison-bar {
        height: 28px;
    }
    .bar-segment span {
        font-size: 0.55rem;
    }

    /* FAQ - mobile adjustments */
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .faq-item {
        padding: 32px 24px;
    }

    /* Final CTA - mobile adjustments */
    .final-cta {
        padding: 80px 24px;
    }
    .final-cta h2 {
        font-size: 2rem;
    }
}