/* =============================================
   VOCL - Professional Medical BCI Website
   Glassmorphism Design
   ============================================= */

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-primary: #0a0f1c;
    --color-primary-light: #141b2d;
    --color-accent: #0066cc;
    --color-accent-light: #3d8bfd;
    --color-accent-glow: rgba(0, 102, 204, 0.4);
    --color-text: #1a1a2e;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-background: #f0f4f8;
    --color-background-alt: #e8eef4;
    --color-border: rgba(255, 255, 255, 0.2);
    --color-border-light: rgba(255, 255, 255, 0.1);
    
    /* Glass effect */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-bg-dark: rgba(10, 15, 28, 0.8);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 17px;
    --font-size-sm: 15px;
    --font-size-xs: 13px;
    --font-size-lg: 19px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;
    --font-size-4xl: 48px;
    --font-size-5xl: 60px;
    --line-height-tight: 1.2;
    --line-height-base: 1.7;
    --line-height-relaxed: 1.8;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 80px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    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: var(--line-height-base);
    color: var(--color-text);
    background: white;
}

body.index-page {
    background: white;
}

body.index-page .hero-full {
    background: linear-gradient(135deg, #e8eef4 0%, #f0f4f8 50%, #e2e8f0 100%);
}

body.index-page .university-banner-hero .banner-text {
    color: var(--color-text);
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-3xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    color: var(--color-text-secondary);
}

strong {
    color: var(--color-text);
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: white;
    box-shadow: 0 4px 15px var(--color-accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--color-accent-glow);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--color-text);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

/* =============================================
   GLASSMORPHISM NAVIGATION
   ============================================= */
.nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 1100px;
    height: 64px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--glass-shadow);
    z-index: 1000;
}

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

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 28px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 10px 16px;
    border-radius: 12px;
    transition: all var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.05);
}

.nav-links .nav-cta {
    background: var(--color-primary);
    color: white;
    padding: 10px 20px;
    margin-left: 8px;
}

.nav-links .nav-cta:hover {
    background: var(--color-primary-light);
    transform: scale(1.02);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
}

.nav-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-fast);
    border-radius: 1px;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 100px;
    left: 20px;
    right: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: var(--space-lg);
    box-shadow: var(--glass-shadow);
    z-index: 999;
}

.mobile-menu.active {
    display: block;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-nav-links a {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text);
    padding: var(--space-sm);
    border-radius: 12px;
    transition: background var(--transition-fast);
}

.mobile-nav-links a:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    padding-top: calc(var(--nav-height) + var(--space-4xl));
    padding-bottom: var(--space-4xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    width: 100%;
}

.hero-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.hero-content h1 {
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
}

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

.product-showcase {
    text-align: center;
}

.device-illustration {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: var(--space-xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.device-svg {
    width: 100%;
    max-width: 420px;
    height: auto;
}

.device-caption {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Electrode animations */
.electrode {
    opacity: 0.7;
    animation: electrode-pulse 2s ease-in-out infinite;
}

.electrode.e1 { animation-delay: 0s; }
.electrode.e2 { animation-delay: 0.2s; }
.electrode.e3 { animation-delay: 0.4s; }
.electrode.e4 { animation-delay: 0.6s; }
.electrode.e5 { animation-delay: 0.8s; }
.electrode.e6 { animation-delay: 1.0s; }

@keyframes electrode-pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.signal {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    animation: signal-flow 2.5s linear infinite;
}

.signal.s1 { animation-delay: 0s; }
.signal.s2 { animation-delay: 0.4s; }
.signal.s3 { animation-delay: 0.8s; }

@keyframes signal-flow {
    to { stroke-dashoffset: 0; }
}

.electrode-labels text {
    font-family: var(--font-family);
    font-weight: 500;
}

/* =============================================
   PROBLEM SECTION
   ============================================= */
.problem {
    padding: var(--space-2xl) 0;
    background: white;
    position: relative;
}

.index-page .problem {
    background: white;
}

/* Problem content - clean layout */
.index-page .problem-content {
    max-width: 900px;
    margin: 0 auto;
}

/* Hero logo showcase */
.hero-logo-showcase {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.hero-logo-large {
    max-width: 350px;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.15));
    animation: float 6s ease-in-out infinite;
    border-radius: 24px;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.index-page .problem-content h2 {
    color: var(--color-accent);
}

.index-page .problem .problem-stat {
    color: #000000 !important;
}

.index-page .problem .problem-text {
    color: #000000 !important;
}

.index-page .problem .stat-number {
    color: #000000 !important;
}

.index-page .problem .stat-label {
    color: #000000 !important;
}

.problem::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.problem-content {
    max-width: 800px;
}

.section-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-light);
    margin-bottom: var(--space-lg);
}

.problem-stat {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: white;
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-lg);
}

.index-page .problem-stat {
    color: #000000 !important;
}

.problem-text {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--space-xl);
}

.index-page .problem-text {
    color: #000000 !important;
}

.problem-stats {
    display: flex;
    gap: var(--space-3xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
}

.index-page .stat-number {
    color: #000000 !important;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.index-page .stat-label {
    color: #000000 !important;
}

/* =============================================
   SECTION STYLES
   ============================================= */
.section-title {
    text-align: center;
    margin-bottom: var(--space-md);
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* =============================================
   PAGE HEADER (for multi-page layout)
   ============================================= */
.page-header {
    padding-top: calc(var(--nav-height) + var(--space-3xl));
    padding-bottom: var(--space-2xl);
    text-align: center;
    background: var(--color-primary);
    position: relative;
}

.page-header .container {
    padding: var(--space-2xl);
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.page-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-md);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.75);
    max-width: 700px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

/* Page CTAs */
.page-cta,
.story-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

/* Active nav link */
.nav-links a.active {
    color: var(--color-accent);
    font-weight: 600;
}

/* =============================================
   STORY SECTION
   ============================================= */
.story {
    padding: var(--space-4xl) 0;
}

.story-content {
    max-width: 750px;
    margin: 0 auto;
}

.story-text {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

.story-lead {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.story-text p {
    margin-bottom: var(--space-md);
}

.story-realization {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-text);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    border-left: 4px solid var(--color-accent);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 0 16px 16px 0;
}

/* =============================================
   HOW IT WORKS
   ============================================= */
.how-it-works {
    padding: var(--space-4xl) 0;
    background: var(--color-background-alt);
}

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

.step {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-xl);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.step-number {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.step-icon {
    width: 48px;
    height: 48px;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.step h3 {
    margin-bottom: var(--space-sm);
}

.step p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

/* Process Flowchart Section */
.process-flowchart-section {
    padding: var(--space-2xl) 0;
    background: white;
}

.process-flowchart {
    margin: 0;
    padding: 0;
}

.process-flowchart h3 {
    text-align: center;
    font-size: var(--font-size-xl);
    color: var(--color-text);
    margin-bottom: var(--space-xl);
}

/* University Banner */
.university-banner-section {
    padding: var(--space-lg) 0;
    background: white;
    overflow: hidden;
}

.university-banner-hero {
    grid-column: 1 / -1;
    margin-top: var(--space-md);
    padding-top: var(--space-sm);
    border-top: none;
}

.banner-text {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    font-weight: 500;
}

.university-banner {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: var(--space-lg) 0;
}

.university-logos-track {
    display: flex;
    gap: var(--space-xl);
    animation: scroll-logos 20s linear infinite;
    width: fit-content;
}

/* Duplicate logos for seamless loop */
.university-banner {
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.university-logo-item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 80px;
    opacity: 0.85;
    transition: opacity var(--transition-base);
}

.university-logo-item:hover {
    opacity: 1;
}

.university-logo {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: 70px;
    object-fit: contain;
    opacity: 1;
    display: block;
}

.university-logo-text {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    font-weight: 600;
}

@keyframes scroll-logos {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.flowchart-container {
    max-width: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(11, auto);
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
}

.flowchart-step {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.flowchart-box {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 16px;
    padding: var(--space-md);
    width: 150px;
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 160px;
}

.flowchart-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.15);
}

.flowchart-box.flowchart-final {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.05) 0%, rgba(0, 102, 204, 0.02) 100%);
    border-color: var(--color-accent);
}

.flowchart-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xs);
    flex-shrink: 0;
}

.flowchart-final .flowchart-number {
    background: var(--color-primary);
}

.flowchart-box h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin: var(--space-xs) 0 var(--space-xs);
    line-height: 1.3;
}

.flowchart-box p {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.4;
    margin: 0;
}

.flowchart-arrow {
    font-size: 28px;
    color: var(--color-accent);
    font-weight: bold;
    margin: 0 var(--space-sm);
    line-height: 1;
    flex-shrink: 0;
}

/* Key Insight */
.key-insight {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.1) 0%, rgba(0, 102, 204, 0.05) 100%);
    border: 1px solid rgba(0, 102, 204, 0.2);
    border-radius: 20px;
    padding: var(--space-xl);
    text-align: center;
}

.key-insight h3 {
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.key-insight p {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto;
}

/* =============================================
   WHO IT'S FOR
   ============================================= */
.who-its-for {
    padding: var(--space-4xl) 0;
}

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

.condition-card {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-xl);
    transition: transform var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.condition-card:hover {
    transform: translateY(-4px);
}

.condition-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.condition-card p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.dignity-statement {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.dignity-statement p {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    font-style: italic;
    line-height: var(--line-height-relaxed);
}

/* =============================================
   TECHNOLOGY SECTION
   ============================================= */
.technology {
    padding: var(--space-4xl) 0;
    background: var(--color-background-alt);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.tech-card {
    background: white;
    padding: var(--space-lg);
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    transition: all var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.tech-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.tech-card h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-sm);
}

.tech-card p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

/* Validation Stats */
.validation-stats {
    background: var(--color-primary);
    border-radius: 20px;
    padding: var(--space-xl);
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.validation-stats h3 {
    color: white;
    text-align: center;
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    opacity: 0.8;
}

.validation-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.validation-item {
    text-align: center;
}

.validation-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    margin-bottom: 4px;
}

.validation-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
}

/* Comparison Table */
.comparison-section {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-xl);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.comparison-section h3 {
    text-align: center;
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
}

.comparison-table {
    display: grid;
    gap: 2px;
    background: var(--color-border);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-header,
.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.comparison-header {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.comparison-header span,
.comparison-row span {
    padding: var(--space-md);
    background: white;
    text-align: center;
}

.comparison-header span:first-child,
.comparison-row span:first-child {
    text-align: left;
}

.comparison-row .row-label {
    font-weight: 500;
    color: var(--color-text);
}

.comparison-header span.highlight,
.comparison-row span.highlight {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.1) 0%, rgba(0, 102, 204, 0.05) 100%);
    color: var(--color-accent);
    font-weight: 600;
}

/* =============================================
   DEMO PORTAL
   ============================================= */
.demo-portal {
    padding: var(--space-4xl) 0;
    background: var(--color-primary);
    position: relative;
}

.demo-portal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.demo-portal .section-title,
.demo-portal .section-intro {
    color: white;
}

.demo-portal .section-intro {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--space-xl);
}

.demo-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--space-lg);
    align-items: start;
}

.demo-frame-wrapper {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

.demo-frame-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-background-alt);
    border-bottom: 1px solid var(--color-border);
}

.demo-status {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.demo-badge {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(0, 102, 204, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
}

.demo-iframe {
    width: 100%;
    height: 700px;
    border: none;
    display: block;
}

.demo-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.demo-info-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: var(--space-md);
}

.demo-info-card h3 {
    font-size: var(--font-size-sm);
    color: white;
    margin-bottom: var(--space-xs);
}

.demo-info-card p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    line-height: var(--line-height-relaxed);
}

/* =============================================
   TEAM SECTION
   ============================================= */
.team {
    padding: var(--space-4xl) 0;
}

.team-intro {
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--space-xl);
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.team-intro p {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

/* Team Photo */
.team-photo-container {
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
    padding: 6px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: 24px;
    box-shadow: 
        0 20px 40px rgba(0, 102, 204, 0.15),
        0 8px 16px rgba(0, 0, 0, 0.1);
}

.team-photo {
    width: 100%;
    height: auto;
    border-radius: 20px;
    display: block;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.team-member {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-lg);
    text-align: center;
    transition: transform var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.team-member:hover {
    transform: translateY(-4px);
}

.team-member h3 {
    font-size: var(--font-size-lg);
    margin-bottom: 4px;
}

.team-member .role {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.team-member p:last-child {
    font-size: var(--font-size-sm);
}

/* Advisors */
.advisors {
    margin-bottom: var(--space-3xl);
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-xl);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.advisors h3 {
    text-align: center;
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* University Seals Row */
.university-seals {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.university-seal {
    height: 70px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
    opacity: 0.85;
    transition: all var(--transition-base);
}

.university-seal:hover {
    opacity: 1;
    transform: scale(1.08);
}

.advisor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.advisor {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: transform var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.advisor:hover {
    transform: translateY(-4px);
}

.advisor-seal {
    width: 44px;
    height: 44px;
    object-fit: contain;
    margin-bottom: var(--space-xs);
    opacity: 0.9;
    display: block;
    flex-shrink: 0;
}

.advisor-name {
    font-weight: 600;
    color: var(--color-text);
}

.advisor-affiliation {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
}

.advisor-specialty {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.advisor-quote {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
    padding: var(--space-lg);
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.quote-attribution {
    display: block;
    margin-top: var(--space-sm);
    font-size: var(--font-size-sm);
    font-style: normal;
    color: var(--color-text-muted);
}

/* Clinical Partners */
.clinical-partners {
    text-align: center;
    padding: var(--space-xl);
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.clinical-partners h3 {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.clinical-partners p {
    font-size: var(--font-size-base);
}

/* =============================================
   SURVEY VALIDATION
   ============================================= */
.validation {
    padding: var(--space-4xl) 0;
    background: var(--color-background-alt);
}

.survey-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.survey-group {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    padding: var(--space-xl);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.survey-group h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.survey-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.survey-stat {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.survey-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
    min-width: 70px;
}

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

/* =============================================
   CONTACT SECTION
   ============================================= */
.contact {
    padding: var(--space-4xl) 0;
}

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

.contact-option {
    padding: var(--space-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    text-align: center;
    transition: transform var(--transition-base);
}

.contact-option:hover {
    transform: translateY(-4px);
}

.contact-option h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-sm);
}

.contact-option p {
    font-size: var(--font-size-sm);
}

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

.contact-cta .btn {
    margin-bottom: var(--space-md);
}

.contact-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    background: var(--color-primary);
    color: white;
    padding: var(--space-3xl) 0 var(--space-lg);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-3xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    height: 48px;
    width: auto;
    margin-bottom: var(--space-md);
    border-radius: 8px;
}

.footer-brand p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: var(--space-3xl);
}

.footer-col h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

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

.footer-col a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: var(--space-sm);
}

.footer-disclaimer {
    max-width: 600px;
    margin: 0 auto;
}

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 900px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: var(--space-xl);
    }
    
    .steps-grid,
    .conditions-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advisor-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .university-seals {
        gap: var(--space-xl);
    }
    
    .university-seal {
        height: 55px;
    }
    
    .validation-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .comparison-header,
    .comparison-row {
        font-size: var(--font-size-xs);
    }
    
    .comparison-header span,
    .comparison-row span {
        padding: var(--space-sm);
    }
    
    .problem-stats {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .survey-grid {
        grid-template-columns: 1fr;
    }
    
    .demo-container {
        grid-template-columns: 1fr;
    }
    
    .demo-sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .demo-info-card {
        flex: 1;
        min-width: 200px;
    }
    
    .demo-iframe {
        height: 600px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 36px;
        --font-size-3xl: 28px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
    }
    
    .nav {
        top: 12px;
        width: calc(100% - 24px);
        height: 56px;
        border-radius: 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .mobile-menu {
        top: 80px;
        left: 12px;
        right: 12px;
    }
    
    .hero {
        padding-top: calc(80px + var(--space-2xl));
        padding-bottom: var(--space-2xl);
        min-height: auto;
    }
    
    .problem,
    .story,
    .how-it-works,
    .demo-portal,
    .who-its-for,
    .technology,
    .team,
    .validation,
    .contact {
        padding: var(--space-2xl) 0;
    }
    
    .section-intro {
        margin-bottom: var(--space-xl);
    }
    
    .steps-grid,
    .conditions-grid,
    .tech-grid {
        margin-bottom: var(--space-xl);
    }
    
    .dignity-statement,
    .key-insight {
        padding: var(--space-lg);
    }
    
    .process-flowchart {
        margin: var(--space-xl) 0;
    }
    
    .flowchart-container {
        max-width: 100%;
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .flowchart-step {
        width: 100%;
        max-width: 100%;
    }
    
    .flowchart-arrow {
        transform: rotate(90deg);
        margin: var(--space-xs) 0;
    }
    
    .flowchart-box {
        padding: var(--space-md);
    }
    
    .flowchart-box h4 {
        font-size: var(--font-size-base);
    }
    
    .flowchart-box p {
        font-size: var(--font-size-xs);
    }
    
    .process-flowchart-section {
        padding: var(--space-3xl) 0;
    }
    
    .university-banner-section {
        padding: var(--space-xl) 0;
    }
    
    .banner-text {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-lg);
    }
    
    .university-logo-item {
        width: 80px;
        height: 80px;
    }
    
    .university-logos-track {
        gap: var(--space-xl);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .advisor-grid {
        grid-template-columns: 1fr;
    }
    
    .university-seals {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .university-seal {
        height: 45px;
    }
    
    .validation-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .demo-iframe {
        height: 500px;
    }
    
    .demo-sidebar {
        flex-direction: column;
    }
    
    .demo-info-card {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .problem-stats {
        flex-direction: column;
    }
    
    .comparison-header,
    .comparison-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .comparison-header span:nth-child(2),
    .comparison-row span:nth-child(2) {
        display: none;
    }
    
    .validation-grid {
        grid-template-columns: 1fr;
    }
}

/* =============================================
   ACCESSIBILITY
   ============================================= */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .electrode,
    .signal,
    .status-dot {
        animation: none;
    }
    
    .btn,
    .step,
    .tech-card,
    .condition-card,
    .team-member,
    .advisor,
    .contact-option {
        transition: none;
    }
}

/* Focus states for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .nav,
    .hero-cta,
    .contact-cta,
    .footer,
    .demo-portal {
        display: none;
    }
    
    body {
        font-size: 12pt;
        background: white;
    }
    
    .hero {
        padding-top: 0;
        min-height: auto;
    }
}

/* =============================================
   MULTI-PAGE SPECIFIC STYLES
   ============================================= */

/* Story Page */
.story-page {
    padding: var(--space-3xl) 0;
}

.story-page .story-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-page .story-text {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

.story-page .story-lead {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.story-page .story-text p {
    margin-bottom: var(--space-md);
}

.story-highlight {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-text);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    border-left: 4px solid var(--color-accent);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 0 16px 16px 0;
}

.story-mission {
    margin-top: var(--space-xl);
    padding: var(--space-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    text-align: center;
}

.story-mission h3 {
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.story-mission p {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-text);
}

/* How It Works Page */
.how-it-works-page {
    padding: var(--space-3xl) 0;
}

.who-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.who-section h2 {
    text-align: center;
    margin-bottom: var(--space-md);
}

/* Exhibits Section */
.exhibits-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.exhibits-section h2 {
    text-align: center;
    margin-bottom: var(--space-md);
    font-size: var(--font-size-3xl);
}

.exhibits-section .section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.exhibit-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.exhibit-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.exhibit-content {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.exhibit-image {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: white;
    padding: var(--space-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 100px;
    align-self: start;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.exhibit-img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    object-fit: contain;
}

.exhibit-text h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.exhibit-stat {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.exhibit-text p {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.exhibit-findings {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.exhibit-findings h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.exhibit-findings ul {
    list-style: none;
    padding-left: 0;
}

.exhibit-findings li {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
    padding-left: var(--space-md);
    position: relative;
}

.exhibit-findings li::before {
    content: "•";
    color: var(--color-accent);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.exhibit-tldr {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.08) 0%, rgba(0, 102, 204, 0.03) 100%);
    border-left: 4px solid var(--color-accent);
    border-radius: 8px;
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.exhibit-tldr h4 {
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.exhibit-tldr p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: 0;
}

.exhibit-detailed {
    margin-top: var(--space-lg);
}

.exhibit-detailed summary {
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.exhibit-detailed summary::-webkit-details-marker {
    display: none;
}

.exhibit-detailed summary::before {
    content: "▶";
    display: inline-block;
    margin-right: var(--space-xs);
    transition: transform var(--transition-fast);
    color: var(--color-accent);
    font-size: 0.75em;
}

.exhibit-detailed[open] summary::before {
    transform: rotate(90deg);
}

.exhibit-detailed summary h4 {
    display: inline-block;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0;
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
}

.exhibit-detailed[open] summary h4 {
    border-bottom: none;
    margin-bottom: var(--space-md);
}

.exhibit-detailed-content {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.exhibit-detailed p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.exhibit-detailed p:last-of-type {
    margin-bottom: var(--space-md);
}

.exhibit-detailed p strong {
    color: var(--color-text);
    font-weight: 600;
}

/* Technology Page */
.technology-page {
    padding: var(--space-3xl) 0;
}

/* 3D Model Viewer Section */
.model-viewer-section {
    margin-top: var(--space-3xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.model-viewer-section h2 {
    text-align: center;
    margin-bottom: var(--space-md);
    font-size: var(--font-size-3xl);
}

.model-viewer-section .section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.model-container {
    max-width: 900px;
    margin: 0 auto var(--space-xl);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--space-md);
}

model-viewer {
    border-radius: 16px;
    --poster-color: transparent;
}

.model-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 500px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.model-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    max-width: 900px;
    margin: var(--space-xl) auto var(--space-3xl);
}

.model-feature {
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 16px;
    padding: var(--space-lg);
    text-align: center;
    transition: transform var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.model-feature:hover {
    transform: translateY(-4px);
}

.model-feature h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.model-feature p {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.model-note {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.model-error {
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.3);
    border-radius: 8px;
    padding: var(--space-md);
    color: #dc3545;
    font-size: var(--font-size-sm);
}

/* Team Page */
.team-page {
    padding: var(--space-3xl) 0;
}

.validation-section {
    margin-top: var(--space-3xl);
    padding: var(--space-xl);
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.validation-section h3 {
    text-align: center;
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-2xl);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--space-lg);
    border-radius: 16px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.validation-section .section-intro {
    margin-bottom: var(--space-xl);
}

/* Contact Page */
.contact-page {
    padding: var(--space-3xl) 0;
    min-height: 60vh;
}

.contact-cta-large {
    text-align: center;
    margin-top: var(--space-3xl);
    padding: var(--space-3xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.contact-cta-large .btn {
    font-size: var(--font-size-xl);
    padding: var(--space-md) var(--space-xl);
}

.contact-note {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Demo Page - Full Width */
.demo-page-body {
    background: var(--color-primary);
}

.demo-portal-full {
    padding-top: calc(var(--nav-height) + var(--space-xl));
    padding-bottom: var(--space-xl);
    min-height: 100vh;
}

.demo-portal-full .page-title,
.demo-portal-full .page-subtitle {
    color: white;
}

.demo-portal-full .page-subtitle {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--space-xl);
}

.demo-container-full {
    margin-bottom: var(--space-xl);
}

.demo-frame-wrapper-full {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

.demo-iframe-full {
    width: 100%;
    height: 75vh;
    min-height: 600px;
    border: none;
    display: block;
}

.demo-info-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.demo-info-row .demo-info-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: var(--space-lg);
}

.demo-info-row .demo-info-card h3 {
    font-size: var(--font-size-base);
    color: white;
    margin-bottom: var(--space-xs);
}

.demo-info-row .demo-info-card p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    line-height: var(--line-height-relaxed);
}

/* Hero Full Height */
.hero-full {
    min-height: auto;
    padding-bottom: var(--space-xl);
}

/* Responsive for multi-page */
@media (max-width: 768px) {
    .page-header {
        padding-top: calc(80px + var(--space-xl));
        padding-bottom: var(--space-lg);
    }
    
    .page-title {
        font-size: var(--font-size-2xl);
    }
    
    .page-cta,
    .story-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .demo-info-row {
        grid-template-columns: 1fr;
    }
    
    .demo-iframe-full {
        height: 60vh;
        min-height: 400px;
    }
    
    .exhibit-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .exhibit-image {
        order: 1;
        position: static;
    }
    
    .exhibit-text {
        order: 2;
    }
    
    .model-info {
        grid-template-columns: 1fr;
    }
    
    model-viewer {
        height: 400px !important;
    }
    
    .model-loading {
        height: 400px;
    }
}