/* =============================================
   ROYSA - Enterprise Document AI
   Clean, Apple-inspired design system
   ============================================= */

/* CSS Custom Properties */
:root {
    /* Color Palette - Warm to Cool gradient inspired by logo */
    --color-primary: #0a0a0a;
    --color-secondary: #1a1a1a;
    --color-accent-warm: #ff6b4a;
    --color-accent-mid: #48c774;
    --color-accent-cool: #3b82f6;
    --color-accent-teal: #14b8a6;
    
    /* Grays */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Functional Colors */
    --color-text: #0a0a0a;
    --color-text-secondary: #525252;
    --color-text-muted: #737373;
    --color-background: #ffffff;
    --color-surface: #fafafa;
    --color-border: #e5e5e5;
    
    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #ff6b4a 0%, #f59e0b 25%, #48c774 50%, #14b8a6 75%, #3b82f6 100%);
    --gradient-subtle: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #171717 100%);
    
    /* Typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Instrument Serif', Georgia, serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::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-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

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

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* =============================================
   NAVIGATION
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo-img {
    height: 62px;
    width: auto;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 450;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}

.nav-link.cta-button {
    background: var(--color-primary);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-link.cta-button:hover {
    background: var(--color-gray-800);
    transform: translateY(-1px);
}

.nav-link.cta-button.active {
    background: var(--color-primary);
    color: white;
}

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

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

/* =============================================
   BUTTONS
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-gray-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-300);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(255, 107, 74, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(59, 130, 246, 0.06), transparent),
        linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 100%);
    z-index: -1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

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

.hero-title {
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: 1.375rem;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    font-weight: 400;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

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

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.doc-animation {
    position: relative;
    width: 320px;
    perspective: 1000px;
}

.doc-page {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-xl);
    transform: rotateY(-5deg) rotateX(5deg);
    animation: docFloat 6s ease-in-out infinite;
}

@keyframes docFloat {
    0%, 100% { transform: rotateY(-5deg) rotateX(5deg) translateY(0); }
    50% { transform: rotateY(-3deg) rotateX(3deg) translateY(-10px); }
}

.doc-line {
    height: 12px;
    background: var(--color-gray-200);
    border-radius: 6px;
    margin-bottom: var(--space-md);
}

.doc-line.short {
    width: 60%;
}

.doc-highlight {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: var(--space-lg) 0;
    animation: highlightPulse 3s ease-in-out infinite;
}

@keyframes highlightPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Paper-style Document Demo */
.doc-page.paper-style {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    font-family: 'Times New Roman', Georgia, serif;
}

/* Document text styling */
.doc-text {
    font-size: 0.75rem;
    color: var(--color-text);
    line-height: 1.5;
    margin: 0;
}

.doc-text.dimmed {
    color: var(--color-gray-500);
}

/* Annotated regions with highlight effect */
.annotated-region {
    position: relative;
    padding: 8px 12px;
    border-radius: 4px;
    border-width: 2px;
    border-style: solid;
    border-color: #cccccc;
    background-color: transparent;
    display: inline-block;
    width: fit-content;
}

.annotated-region.inline {
    display: inline-flex !important;
    align-items: center;
    padding: 4px 8px;
}

/* Region labels - positioned like annotation tags */
.region-label {
    position: absolute;
    top: -10px;
    left: 8px;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: 3px;
    white-space: nowrap;
    background-color: #666666;
    color: #ffffff;
    display: inline-block;
}

.annotated-region.inline .region-label {
    position: static;
    margin-right: 8px;
}

/* Blue annotation (Title) */
.annotated-region.blue {
    border-color: #3b82f6 !important;
    background-color: rgba(59, 130, 246, 0.08) !important;
}

.annotated-region.blue .region-label {
    background-color: #3b82f6 !important;
    color: #ffffff !important;
}

/* Orange annotation (First Author) */
.annotated-region.orange {
    border-color: #f59e0b !important;
    background-color: rgba(245, 158, 11, 0.1) !important;
}

.annotated-region.orange .region-label {
    background-color: #f59e0b !important;
    color: #ffffff !important;
}

/* Pink annotation (Contributions) */
.annotated-region.pink {
    border-color: #ec4899 !important;
    background-color: rgba(236, 72, 153, 0.08) !important;
}

.annotated-region.pink .region-label {
    background-color: #ec4899 !important;
    color: #ffffff !important;
}

/* Authors line */
.doc-authors-line {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

/* Body text (non-annotated) */
.doc-body-text {
    padding: 4px 0;
}

.doc-body-text .doc-text {
    color: var(--color-gray-500);
    font-size: 0.65rem;
}

/* Extraction Table */
.extraction-table {
    background: var(--color-gray-800);
    border-radius: var(--radius-lg);
    overflow: hidden;
    width: 100%;
}

.extraction-header {
    display: grid;
    grid-template-columns: 110px 1fr 60px;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-gray-700);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.extraction-row {
    display: grid;
    grid-template-columns: 110px 1fr 60px;
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-gray-700);
    align-items: center;
}

.ext-key {
    font-size: 0.7rem;
    font-weight: 600;
}

.ext-key.blue { color: #3b82f6; }
.ext-key.orange { color: #f59e0b; }
.ext-key.pink { color: #ec4899; }

.ext-value {
    font-size: 0.8rem;
    color: var(--color-gray-300);
}

.ext-conf {
    font-size: 0.8rem;
    font-weight: 600;
    color: #22c55e;
    text-align: right;
}

/* =============================================
   FEATURES SECTION
   ============================================= */
.features {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

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

.feature-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.feature-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* =============================================
   PRODUCT HIGHLIGHT
   ============================================= */
.product-highlight {
    padding: var(--space-4xl) 0;
    background: var(--gradient-dark);
    color: white;
}

.product-highlight .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.product-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-teal);
    margin-bottom: var(--space-md);
}

.product-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--space-sm);
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-tagline {
    font-size: 1.25rem;
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
    font-weight: 400;
}

.product-description {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.product-highlight .btn-primary {
    background: white;
    color: var(--color-primary);
}

.product-highlight .btn-primary:hover {
    background: var(--color-gray-100);
}

/* Trace Demo */
.trace-demo {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.trace-input,
.trace-output {
    background: var(--color-gray-800);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.trace-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
}

.trace-doc {
    width: 120px;
    height: 160px;
    background: var(--color-gray-700);
    border-radius: var(--radius-md);
}

.trace-arrow {
    color: var(--color-gray-600);
}

.trace-arrow svg {
    width: 32px;
    height: 32px;
}

.trace-result {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.result-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-gray-700);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.result-key {
    font-weight: 600;
    color: var(--color-accent-teal);
    min-width: 100px;
    font-size: 0.75rem;
}

.result-key.blue {
    color: #3b82f6;
}

.result-key.orange {
    color: #f59e0b;
}

.result-key.pink {
    color: #ec4899;
}

.result-value {
    color: white;
    flex: 1;
}

.result-conf {
    color: var(--color-accent-mid);
    font-weight: 500;
}

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

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

.audience-card {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.audience-card:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-md);
}

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

.audience-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.audience-card p {
    font-size: 0.875rem;
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
    padding: var(--space-4xl) 0;
    text-align: center;
    background: var(--color-surface);
}

.cta-section h2 {
    margin-bottom: var(--space-md);
}

.cta-section p {
    font-size: 1.125rem;
    margin-bottom: var(--space-2xl);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    padding: var(--space-4xl) 0 var(--space-xl);
    background: var(--color-primary);
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand {
    max-width: 280px;
}

.footer-logo {
    height: 52px;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--color-gray-400);
    font-size: 0.9375rem;
}

.footer-links {
    display: flex;
    gap: var(--space-4xl);
}

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
}

.footer-col a {
    display: block;
    color: var(--color-gray-300);
    font-size: 0.9375rem;
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-800);
}

.footer-bottom p {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* =============================================
   PAGE HERO
   ============================================= */
.page-hero {
    padding: 160px 0 80px;
    background: var(--gradient-subtle);
    text-align: center;
}

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

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

.page-subtitle {
    font-size: 1.375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.page-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto;
}

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

.steps-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.steps-timeline::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 48px;
    right: 48px;
    height: 2px;
    background: var(--color-border);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
}

.step-content h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.step-content p {
    font-size: 0.875rem;
    max-width: 140px;
}

/* =============================================
   CAPABILITIES
   ============================================= */
.capabilities {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

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

.capability-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.capability-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.capability-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-md);
    color: var(--color-accent-teal);
}

.capability-icon svg {
    width: 100%;
    height: 100%;
}

.capability-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.capability-card p {
    font-size: 0.875rem;
}

/* =============================================
   OUTPUT FORMAT
   ============================================= */
.output-format {
    padding: var(--space-4xl) 0;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-top: calc(var(--space-md) * -1);
    margin-bottom: var(--space-3xl);
}

.output-demo {
    max-width: 640px;
    margin: 0 auto;
}

.output-card {
    background: var(--color-gray-900);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.output-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-gray-800);
}

.output-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-600);
}

.output-dot:nth-child(1) { background: #ff5f57; }
.output-dot:nth-child(2) { background: #febc2e; }
.output-dot:nth-child(3) { background: #28c840; }

.output-title {
    margin-left: var(--space-md);
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

.output-code {
    padding: var(--space-lg);
    margin: 0;
    overflow-x: auto;
}

.output-code code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-gray-300);
}

/* =============================================
   USE CASES
   ============================================= */
.use-cases {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

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

.use-case {
    padding: var(--space-xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.use-case h3 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.use-case p {
    font-size: 0.875rem;
}

/* =============================================
   WHY ROYSA PAGE
   ============================================= */
.problem-section {
    padding: var(--space-4xl) 0;
}

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

.problem-label,
.approach-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-warm);
    margin-bottom: var(--space-lg);
}

.problem-title,
.approach-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.4;
    margin-bottom: var(--space-lg);
}

.problem-description,
.approach-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
}

.problem-issues {
    display: grid;
    gap: var(--space-md);
}

.issue {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-radius: var(--radius-md);
}

.issue-icon {
    color: var(--color-accent-warm);
    font-weight: 700;
}

/* Approach Section */
.approach-section {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

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

.approach-label {
    color: var(--color-accent-teal);
}

/* Principles Section */
.principles-section {
    padding: var(--space-4xl) 0;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.principle-card {
    padding: var(--space-2xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.principle-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-gray-300);
    margin-bottom: var(--space-md);
}

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

/* Comparison Section */
.comparison-section {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

.comparison-table {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

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

.comparison-header {
    background: var(--color-gray-100);
    font-weight: 600;
}

.comparison-cell {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
}

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

.comparison-cell.highlight {
    background: rgba(20, 184, 166, 0.05);
    color: var(--color-accent-teal);
    font-weight: 500;
}

.comparison-header .comparison-cell.highlight {
    background: var(--color-accent-teal);
    color: white;
}

/* =============================================
   TECHNOLOGY PAGE
   ============================================= */
.tech-section {
    padding: var(--space-4xl) 0;
}

.tech-section.alt {
    background: var(--color-surface);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.tech-content.reverse {
    direction: rtl;
}

.tech-content.reverse > * {
    direction: ltr;
}

.tech-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-teal);
    margin-bottom: var(--space-md);
}

.tech-text h2 {
    margin-bottom: var(--space-lg);
}

.tech-text > p {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.tech-features {
    list-style: none;
    display: grid;
    gap: var(--space-md);
}

.tech-features li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

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

/* Tech Visuals */
.tech-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-diagram.multimodal {
    position: relative;
    width: 280px;
    height: 280px;
}

.diagram-layer {
    position: absolute;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    animation: layerFloat 4s ease-in-out infinite;
}

.diagram-layer.vision {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.diagram-layer.layout {
    bottom: 20px;
    left: 0;
    animation-delay: 0.5s;
}

.diagram-layer.text {
    bottom: 20px;
    right: 0;
    animation-delay: 1s;
}

@keyframes layerFloat {
    0%, 100% { transform: translateY(0) translateX(-50%); }
    50% { transform: translateY(-8px) translateX(-50%); }
}

.diagram-layer.layout,
.diagram-layer.text {
    animation-name: layerFloatSimple;
}

@keyframes layerFloatSimple {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.layer-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.layer-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.diagram-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    background: var(--gradient-brand);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
}

/* Grounding Demo */
.grounding-demo {
    padding: var(--space-xl);
}

.ground-doc {
    position: relative;
    width: 240px;
    height: 320px;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
}

.ground-text {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
}

.ground-box {
    position: absolute;
    border: 2px solid var(--color-accent-warm);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    animation: boxPulse 2s ease-in-out infinite;
}

.ground-box.box-1 {
    top: 60px;
    left: 20px;
    right: 60px;
}

.ground-box.box-2 {
    top: 140px;
    left: 40px;
    right: 40px;
    border-color: var(--color-accent-teal);
    animation-delay: 0.5s;
}

@keyframes boxPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.ground-label {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
}

.ground-box.box-1 .ground-label {
    color: var(--color-accent-warm);
}

.ground-box.box-2 .ground-label {
    color: var(--color-accent-teal);
}

.ground-line {
    height: 8px;
    background: var(--color-gray-200);
    border-radius: 4px;
    margin-top: var(--space-4xl);
    margin-bottom: var(--space-md);
}

.ground-line.short {
    width: 60%;
}

/* Verification Flow */
.verification-flow {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

.verify-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    min-width: 100px;
}

.verify-icon {
    font-size: 1.5rem;
}

.verify-step span:last-child {
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
}

.verify-arrow {
    color: var(--color-gray-400);
    font-size: 1.25rem;
}

/* Specs Section */
.specs-section {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

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

.spec-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.spec-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.spec-card ul {
    list-style: none;
}

.spec-card li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: var(--space-sm) 0;
}

/* =============================================
   SECURITY PAGE
   ============================================= */
.security-overview {
    padding: var(--space-3xl) 0;
}

.security-intro {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.security-features {
    padding: var(--space-3xl) 0 var(--space-4xl);
}

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

.security-card {
    padding: var(--space-2xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.security-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-lg);
    color: var(--color-accent-teal);
}

.security-icon svg {
    width: 100%;
    height: 100%;
}

.security-card h3 {
    margin-bottom: var(--space-md);
}

.security-card p {
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* Deployment Section */
.deployment-section {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

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

.deployment-card {
    background: white;
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
}

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

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

.deployment-card p {
    font-size: 0.9375rem;
    margin-bottom: var(--space-lg);
}

.deployment-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
}

.deployment-status.available {
    background: rgba(72, 199, 116, 0.1);
    color: var(--color-accent-mid);
}

.deployment-status.coming {
    background: var(--color-gray-100);
    color: var(--color-gray-500);
}

/* Compliance Section */
.compliance-section {
    padding: var(--space-4xl) 0;
}

.compliance-grid {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.compliance-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xl) var(--space-2xl);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.compliance-badge {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.compliance-item span:last-child {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Security Contact */
.security-contact {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

.security-contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.security-contact h2 {
    margin-bottom: var(--space-md);
}

.security-contact p {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-company {
    padding: var(--space-4xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--space-lg);
}

.mission-statement {
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.value-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.value-icon {
    font-size: 1.5rem;
}

.value-text {
    font-weight: 500;
}

/* Founders Section */
.founders-section {
    padding: var(--space-4xl) 0;
    background: var(--color-surface);
}

.founders-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.founder-card {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-2xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.founder-avatar {
    width: 80px;
    height: 80px;
    background: var(--gradient-brand);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.founder-info h3 {
    margin-bottom: var(--space-xs);
}

.founder-title {
    font-size: 0.875rem;
    color: var(--color-accent-teal);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.founder-bio {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Story Section */
.story-section {
    padding: var(--space-4xl) 0;
}

.story-content {
    max-width: 700px;
    margin: 0 auto;
}

.story-content h2 {
    margin-bottom: var(--space-xl);
}

.story-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-section {
    padding: 160px 0 80px;
    min-height: calc(100vh - 200px);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

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

.contact-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
}

.contact-benefits {
    display: grid;
    gap: var(--space-md);
}

.benefit {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.benefit-icon {
    color: var(--color-accent-mid);
    font-weight: 700;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-surface);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.form-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* Form Success */
.form-success {
    text-align: center;
    padding: var(--space-3xl);
}

.success-icon {
    width: 64px;
    height: 64px;
    background: var(--color-accent-mid);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto var(--space-lg);
}

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

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 1024px) {
    .hero .container,
    .product-highlight .container,
    .tech-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .tech-content.reverse {
        direction: ltr;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .features-grid,
    .audience-grid,
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .capabilities-grid,
    .use-cases-grid,
    .security-grid,
    .deployment-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-timeline {
        flex-wrap: wrap;
        gap: var(--space-xl);
    }
    
    .steps-timeline::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-2xl);
        gap: var(--space-lg);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-link {
        font-size: 1.125rem;
    }
    
    .nav-link.cta-button {
        width: 100%;
        text-align: center;
        margin-top: var(--space-lg);
    }
    
    .features-grid,
    .audience-grid,
    .capabilities-grid,
    .use-cases-grid,
    .security-grid,
    .deployment-grid,
    .specs-grid,
    .principles-grid,
    .founders-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        overflow-x: auto;
    }
    
    .comparison-header,
    .comparison-row {
        min-width: 600px;
    }
    
    .verification-flow {
        flex-direction: column;
    }
    
    .verify-arrow {
        transform: rotate(90deg);
    }
    
    .founder-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .trace-demo {
        flex-direction: column;
    }
    
    .trace-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    :root {
        --space-4xl: 4rem;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .page-hero {
        padding: 120px 0 60px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .doc-animation {
        width: 100%;
        max-width: 280px;
    }
    
    .compliance-grid {
        flex-direction: column;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.page-hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.feature-card,
.capability-card,
.audience-card,
.security-card,
.principle-card {
    animation: fadeInUp 0.6s ease-out backwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }