/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #0a0e1a;
    --color-bg-light: #111827;
    --color-bg-card: #1a2234;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-accent: #38bdf8;
    --color-accent-warm: #f59e0b;
    --color-accent-green: #22c55e;
    --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    --max-width: 1200px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 3rem;
    --space-xl: 4rem;
    --radius: 8px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    margin-bottom: var(--space-sm);
}

h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    margin-bottom: var(--space-xs);
}

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

/* Navigation */
.nav {
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

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

.nav-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: calc(var(--space-xl) * 2) 0 var(--space-xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

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

.eyebrow {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-warm);
    margin-bottom: var(--space-sm);
}

.hero h1 {
    margin-bottom: var(--space-md);
}

.hero h1 em {
    color: var(--color-accent);
    font-style: normal;
}

.hero-lead {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.hero-sub {
    font-size: 1.05rem;
    margin-bottom: var(--space-lg);
    max-width: 90%;
}

/* Lead Capture */
.lead-capture {
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: var(--space-md);
    margin-top: var(--space-md);
}

.lead-capture h2 {
    font-size: 1.3rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.lead-capture p {
    font-size: 0.95rem;
    margin-bottom: var(--space-sm);
}

.signup-form {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-xs);
}

.email-input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.05);
    color: var(--color-text);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.email-input:focus {
    border-color: var(--color-accent);
}

.email-input::placeholder {
    color: var(--color-text-muted);
}

.form-note {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(56, 189, 248, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(56, 189, 248, 0.1);
}

.btn-cta {
    background: linear-gradient(135deg, var(--color-accent-warm), #d97706);
    color: white;
    font-size: 1.15rem;
    padding: 1.125rem 2rem;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.4);
}

/* Book Showcase */
.book-showcase {
    position: relative;
    display: flex;
    justify-content: center;
}

.book-cover {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
    max-width: 300px;
}

.book-badge {
    position: absolute;
    top: -10px;
    right: 10%;
    background: var(--color-accent-warm);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.8rem;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

/* Bridge Section */
.bridge {
    padding: var(--space-xl) 0;
    background: var(--color-bg-light);
}

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

.bridge h2 {
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.pain-list,
.gain-list {
    list-style: none;
}

.pain-list li,
.gain-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 1.05rem;
    line-height: 1.5;
}

.pain-list li {
    color: var(--color-text-muted);
}

.gain-list li {
    color: var(--color-text);
}

.gain-list em {
    color: var(--color-accent);
    font-style: normal;
}

/* Science Section */
.science {
    padding: var(--space-xl) 0;
}

.section-eyebrow {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-intro {
    font-size: 1.15rem;
    max-width: 600px;
    margin-bottom: var(--space-lg);
}

.science-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.science-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--radius);
    padding: var(--space-md);
    transition: transform 0.2s, border-color 0.2s;
}

.science-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 189, 248, 0.2);
}

.science-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.science-card h3 {
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.science-card p {
    font-size: 0.95rem;
    line-height: 1.6;
}

.science-card cite {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-style: normal;
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* Supplemental Science Blog */
.supplemental-science {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: var(--space-lg);
    border: 1px solid rgba(255,255,255,0.05);
}

.supplemental-science h3 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.supplemental-intro {
    margin-bottom: var(--space-md);
}

.blog-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.blog-card {
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: var(--space-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: border-color 0.2s;
}

.blog-card:hover {
    border-color: rgba(56, 189, 248, 0.2);
}

.blog-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(56, 189, 248, 0.15);
    color: var(--color-accent);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-bottom: var(--space-xs);
}

.blog-card h4 {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.blog-card p {
    font-size: 0.9rem;
    margin-bottom: var(--space-sm);
}

.read-more {
    font-size: 0.9rem;
    font-weight: 600;
}

/* Testimonials */
.testimonials {
    padding: var(--space-xl) 0;
    background: var(--color-bg-light);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.testimonial {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: var(--space-md);
    border: 1px solid rgba(255,255,255,0.05);
}

.testimonial p {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: var(--space-sm);
}

.testimonial footer {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Direct Access Section */
.direct-access {
    padding: calc(var(--space-xl) * 1.5) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 50%, var(--color-bg) 100%);
    position: relative;
}

.direct-access::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(245, 158, 11, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.access-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.access-lead {
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
}

.value-stack {
    margin-bottom: var(--space-md);
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 1rem;
    color: var(--color-text);
}

.value-check {
    color: var(--color-accent-green);
    font-weight: 700;
    flex-shrink: 0;
}

.pricing {
    margin: var(--space-md) 0;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text);
    display: block;
}

.price-note {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.cta-note {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.cta-note a {
    color: var(--color-text-muted);
    text-decoration: underline;
}

.package-showcase {
    position: relative;
    display: flex;
    justify-content: center;
}

.package-showcase img {
    border-radius: var(--radius);
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
}

.package-badge {
    position: absolute;
    top: -10px;
    right: 5%;
    background: linear-gradient(135deg, var(--color-accent-warm), #d97706);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
    transform: rotate(3deg);
}

/* Community Section */
.community {
    padding: var(--space-xl) 0;
    background: var(--color-bg-light);
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.community h2 {
    margin-bottom: var(--space-sm);
}

.community-benefits {
    list-style: none;
    margin-top: var(--space-md);
}

.community-benefits li {
    padding: var(--space-xs) 0;
    font-size: 1.05rem;
    color: var(--color-text);
}

/* Resources */
.resources {
    padding: var(--space-xl) 0;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.resource-card {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: var(--space-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.2s, border-color 0.2s;
    text-decoration: none;
    color: inherit;
}

.resource-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 189, 248, 0.2);
}

.resource-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.resource-card h3 {
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    font-size: 1.1rem;
}

.resource-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Footer */
.footer {
    padding: var(--space-xl) 0 var(--space-md);
    background: var(--color-bg);
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-brand .logo {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

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

.footer-links li {
    margin-bottom: var(--space-xs);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-bottom {
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.05);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .hero-grid,
    .bridge-grid,
    .science-grid,
    .blog-preview-grid,
    .testimonial-grid,
    .access-grid,
    .community-grid,
    .resource-grid,
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .book-showcase,
    .package-showcase {
        order: -1;
        margin-bottom: var(--space-md);
    }
    
    .signup-form {
        flex-direction: column;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--space-md);
        border-top: 1px solid rgba(255,255,255,0.05);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero {
        padding-top: calc(var(--space-xl) * 1.5);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero-lead {
        font-size: 1.1rem;
    }
    
    .btn-cta {
        width: 100%;
    }
    
    .value-item {
        font-size: 0.9rem;
    }
    
    .package-badge {
        font-size: 0.75rem;
        padding: 0.5rem 0.75rem;
    }
}