/* ============================================
   VenaBlock® Multi-Page Website
   Apple-Inspired Design System
   SEO Optimized Structure
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #000000;
    --color-bg-secondary: #0a0a0f;
    --color-bg-tertiary: #111118;
    --color-bg-card: #161622;
    
    /* Text Colors */
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;
    
    /* Brand Colors */
    --color-accent: #00d4ff;
    --color-accent-secondary: #0066ff;
    --color-accent-gradient: linear-gradient(135deg, #00d4ff 0%, #0066ff 50%, #6366f1 100%);
    --color-success: #00ff88;
    --color-warning: #ff9500;
    --color-error: #ff3b30;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-hero: clamp(2.5rem, 6vw, 4.5rem);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    --header-height: 72px;
    
    /* Effects */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.3);
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
}

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

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
    height: var(--header-height);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.nav-logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.logo-text sup {
    font-size: 0.5em;
    color: var(--color-accent);
}

.logo-tagline {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: var(--transition-base);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-text-primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--color-accent-gradient) !important;
    color: var(--color-bg-primary) !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: var(--border-radius-full);
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--border-radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-lg);
}

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

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 60%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.text-gradient {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.hero-stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-accent);
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-product-img,
.product-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--border-radius-xl);
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 50%, #e9ecef 100%);
    padding: var(--spacing-md);
}

.hero-product-img {
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.15));
}

.product-showcase {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    margin: 0 auto;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 
        0 25px 80px rgba(0, 0, 0, 0.4),
        0 10px 30px rgba(0, 212, 255, 0.15),
        inset 0 0 60px rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
}

.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 20, 40, 0.95) 0%, rgba(0, 20, 40, 0.7) 50%, transparent 100%);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
    display: flex;
    justify-content: center;
}

.product-label {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent-gradient);
    color: var(--color-bg-primary);
    font-size: var(--font-size-sm);
    font-weight: 700;
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-header.center {
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Features Section
   ============================================ */
.features-section {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-slow);
}

.feature-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.feature-link {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
}

.feature-link:hover {
    color: var(--color-text-primary);
}

/* ============================================
   Product Section
   ============================================ */
.product-section {
    background: var(--color-bg-primary);
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.product-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.product-features {
    margin-bottom: var(--spacing-xl);
}

.product-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.check-icon {
    color: var(--color-success);
    font-weight: 700;
}

.product-image img {
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Evidence Section
   ============================================ */
.evidence-section {
    background: var(--color-bg-secondary);
}

.evidence-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.evidence-stat {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.evidence-value {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.evidence-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.evidence-cta {
    text-align: center;
}

/* ============================================
   Trust Section
   ============================================ */
.trust-section {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
}

.trust-section .container {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.trust-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.trust-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.trust-stat {
    display: flex;
    flex-direction: column;
}

.trust-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-accent);
}

.trust-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.trust-certifications {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.certification {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cert-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--color-accent-gradient);
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--color-bg-primary);
}

.cert-label {
    font-weight: 500;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: var(--color-bg-primary);
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(2, 1fr) 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-company {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-links h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

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

.footer-contact h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-contact address {
    font-style: normal;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.footer-phone a,
.footer-email a {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* ============================================
   Page-Specific Styles
   ============================================ */

/* Page Header */
.page-header {
    padding-top: calc(var(--header-height) + var(--spacing-3xl));
    padding-bottom: var(--spacing-2xl);
    background: var(--color-bg-secondary);
    text-align: center;
}

.page-header .section-title {
    font-size: var(--font-size-5xl);
}

/* Content Sections */
.content-section {
    padding: var(--spacing-3xl) 0;
}

.content-section:nth-child(even) {
    background: var(--color-bg-secondary);
}

/* Research Cards */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.research-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-slow);
}

.research-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.research-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-full);
    margin-bottom: var(--spacing-md);
}

.research-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.research-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.research-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-style: italic;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Contact Cards */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.contact-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.contact-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.contact-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-accent);
}

.contact-card h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.contact-card a,
.contact-card address {
    font-style: normal;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-secondary));
}

.timeline-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
}

.timeline-number {
    width: 80px;
    height: 80px;
    background: var(--color-bg-card);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.timeline-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .trust-stats {
        justify-content: center;
    }
    
    .trust-certifications {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 4rem;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(0, 0, 0, 0.98);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .trust-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* ============================================
   Comparison Table Styles
   ============================================ */

.comparison-section {
    background: var(--color-bg-secondary);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.comparison-table th {
    background: rgba(0, 212, 255, 0.1);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.comparison-table th.highlight {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(0, 102, 255, 0.2) 100%);
    color: var(--color-accent);
}

.comparison-table td {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.comparison-table td.highlight {
    color: var(--color-success);
    font-weight: 500;
}

.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

/* Patient Benefits Section */
.patient-benefits {
    background: var(--color-bg-tertiary);
}

.patient-benefits .feature-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.patient-benefits .feature-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-4px);
}

@media (max-width: 768px) {
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

/* ============================================
   FAQ Section Styles
   ============================================ */

.faq-section {
    background: var(--color-bg-secondary);
}

.faq-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    border-color: rgba(0, 212, 255, 0.3);
}

.faq-item[open] {
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    list-style: none;
    font-weight: 500;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    transition: var(--transition-base);
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-question span {
    flex: 1;
    padding-right: var(--spacing-md);
}

.faq-icon {
    width: 20px;
    height: 20px;
    min-width: 20px;
    max-width: 20px;
    min-height: 20px;
    max-height: 20px;
    flex-shrink: 0;
    color: var(--color-accent);
    transition: transform var(--transition-base);
}

.faq-item[open] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.faq-answer p {
    margin: 0;
}

.faq-answer strong {
    color: var(--color-text-primary);
}

.faq-answer a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

.faq-answer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .faq-question {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .faq-answer {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
}

/* ============================================
   Video Section Styles
   ============================================ */

/* Featured Video */
.featured-video {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    background: var(--color-bg-tertiary);
    box-shadow: var(--shadow-lg);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info {
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.video-info h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.video-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.video-highlights {
    list-style: none;
    padding: 0;
    margin: 0;
}

.video-highlights li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.video-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

/* Video Categories */
.video-categories {
    background: var(--color-bg-secondary);
}

.video-category {
    margin-bottom: var(--spacing-xxl);
}

.video-category:last-child {
    margin-bottom: 0;
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.category-title svg {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.video-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition-base);
}

.video-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.15);
}

.video-thumbnail {
    position: relative;
    display: block;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 212, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.play-overlay svg {
    width: 24px;
    height: 24px;
    color: #000;
    margin-left: 4px;
}

.video-card:hover .play-overlay {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--color-accent);
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.video-content {
    padding: var(--spacing-md);
}

.video-content h4 {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.video-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Responsive Video Styles */
@media (max-width: 1024px) {
    .featured-video {
        grid-template-columns: 1fr;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .category-title {
        font-size: var(--font-size-lg);
    }
    
    .play-overlay {
        width: 50px;
        height: 50px;
    }
    
    .play-overlay svg {
        width: 20px;
        height: 20px;
    }
}


/* ============================================
   ACADEMIC RESEARCH SECTION
   ============================================ */

.academic-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    position: relative;
    overflow: hidden;
}

.academic-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
}

/* Academic Stats Bar */
.academic-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(0, 212, 255, 0.05);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.academic-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.academic-stat-icon {
    font-size: 2rem;
}

.academic-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
}

.academic-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Academic Grid */
.academic-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Academic Card */
.academic-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
}

.academic-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 212, 255, 0.1);
}

.academic-card.featured {
    grid-column: span 3;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(102, 102, 241, 0.05) 100%);
    border-color: rgba(0, 212, 255, 0.2);
    padding: var(--spacing-xl);
}

.academic-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-accent);
    color: #000;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.academic-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.academic-card.featured .academic-title {
    font-size: var(--font-size-xl);
    -webkit-line-clamp: unset;
}

.academic-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: var(--spacing-sm);
}

.academic-authors {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-style: italic;
}

.academic-journal {
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    font-weight: 500;
}

.academic-excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.academic-card.featured .academic-excerpt {
    -webkit-line-clamp: unset;
    font-size: var(--font-size-base);
}

.academic-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.academic-tags .tag {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
}

.academic-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-fast);
    margin-top: auto;
}

.academic-link:hover {
    color: var(--color-text-primary);
}

.academic-link svg {
    transition: transform var(--transition-fast);
}

.academic-link:hover svg {
    transform: translate(2px, -2px);
}

/* Academic More */
.academic-more {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.academic-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Responsive Academic Section */
@media (max-width: 1024px) {
    .academic-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .academic-card.featured {
        grid-column: span 2;
    }
    
    .academic-stats {
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .academic-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .academic-grid {
        grid-template-columns: 1fr;
    }
    
    .academic-card.featured {
        grid-column: span 1;
    }
    
    .academic-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .academic-stat {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .academic-stat-icon {
        font-size: 1.5rem;
    }
    
    .academic-stat-value {
        font-size: var(--font-size-xl);
    }
}