/* ========================================
   WELLIBUY - Official Website Styles
   A Universal AI + Augmented Reality Platform
   ======================================== */

/* ----------------------------------------
   CSS CUSTOM PROPERTIES (Design Tokens)
   ---------------------------------------- */
:root {
    /* Colors - Calm, professional palette */
    --color-background: #FAFAFA;
    --color-background-alt: #F5F5F5;
    --color-surface: #FFFFFF;
    --color-surface-elevated: #FFFFFF;
    
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #4A4A4A;
    --color-text-tertiary: #6B6B6B;
    --color-text-muted: #8A8A8A;
    
    --color-accent: #2C3E50;
    --color-accent-light: #34495E;
    --color-accent-subtle: #ECF0F1;
    
    --color-border: #E5E5E5;
    --color-border-light: #EEEEEE;
    
    --color-success: #27AE60;
    --color-error: #C0392B;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    
    /* Font Sizes - Fluid Typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --text-sm: clamp(0.8125rem, 0.775rem + 0.25vw, 0.875rem);
    --text-base: clamp(0.9375rem, 0.9rem + 0.25vw, 1rem);
    --text-lg: clamp(1.0625rem, 1rem + 0.35vw, 1.125rem);
    --text-xl: clamp(1.1875rem, 1.1rem + 0.5vw, 1.3125rem);
    --text-2xl: clamp(1.375rem, 1.25rem + 0.75vw, 1.625rem);
    --text-3xl: clamp(1.625rem, 1.4rem + 1.25vw, 2.125rem);
    --text-4xl: clamp(2rem, 1.7rem + 1.75vw, 2.75rem);
    --text-5xl: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;
    
    /* Spacing Scale */
    --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;
    --space-5xl: 8rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;
    --container-wide: 1400px;
    --header-height: 72px;
    
    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ----------------------------------------
   RESET & BASE STYLES
   ---------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Visually hidden but accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

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

p:last-child {
    margin-bottom: 0;
}

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

a:hover {
    color: var(--color-accent-light);
}

strong {
    font-weight: 600;
}

ul, ol {
    padding-left: var(--space-lg);
}

li {
    margin-bottom: var(--space-sm);
}

blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-lg);
    margin: var(--space-xl) 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

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

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-2xl);
    }
}

/* ----------------------------------------
   HEADER & NAVIGATION
   ---------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo-symbol {
    font-size: 1.5em;
    color: var(--color-accent);
}

.logo-text {
    letter-spacing: -0.02em;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
    padding: 0;
}

.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    list-style: none;
    flex-direction: column;
    gap: var(--space-sm);
}

.nav-menu.active {
    display: flex;
}

.nav-menu a {
    display: block;
    padding: var(--space-sm) 0;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    background: var(--color-accent);
    color: white !important;
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: var(--radius-sm);
    text-align: center;
    margin-top: var(--space-sm);
}

.nav-cta:hover {
    background: var(--color-accent-light);
}

@media (min-width: 1024px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        background: none;
        border: none;
        padding: 0;
        gap: var(--space-xl);
        align-items: center;
    }
    
    .nav-cta {
        margin-top: 0;
        margin-left: var(--space-sm);
    }
}

/* ----------------------------------------
   BUTTONS
   ---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

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

.btn-secondary:hover {
    background: var(--color-background-alt);
    border-color: var(--color-text-tertiary);
}

.btn-full {
    width: 100%;
}

/* ----------------------------------------
   SECTIONS - COMMON STYLES
   ---------------------------------------- */
.section {
    padding: var(--space-4xl) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--space-5xl) 0;
    }
}

.section-header {
    text-align: center;
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-3xl);
}

.section-eyebrow {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

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

.section-intro {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ----------------------------------------
   HERO SECTION
   ---------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: calc(var(--header-height) + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    background: linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 100%);
    position: relative;
}

.hero-content {
    max-width: var(--container-narrow);
    text-align: center;
}

.hero-eyebrow {
    font-size: var(--text-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 600;
    line-height: 1.15;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.hero-emphasis {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

@media (min-width: 480px) {
    .hero-actions {
        flex-direction: row;
        justify-content: center;
    }
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    display: block;
    width: 1px;
    height: 48px;
    background: linear-gradient(180deg, var(--color-text-muted) 0%, transparent 100%);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ----------------------------------------
   VISION SECTION
   ---------------------------------------- */
.section-vision {
    background: var(--color-surface);
}

.vision-statement {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-3xl);
}

.vision-quote {
    font-size: var(--text-xl);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    border-left: none;
    padding-left: 0;
    font-style: normal;
    text-align: center;
}

.vision-quote p {
    margin-bottom: var(--space-lg);
}

.vision-pillars {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

@media (min-width: 768px) {
    .vision-pillars {
        grid-template-columns: repeat(3, 1fr);
    }
}

.pillar {
    text-align: center;
    padding: var(--space-xl);
}

.pillar-icon {
    font-size: var(--text-3xl);
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.pillar-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.pillar-text {
    color: var(--color-text-secondary);
    font-size: var(--text-base);
}

/* ----------------------------------------
   WHAT IS WELLIBUY SECTION
   ---------------------------------------- */
.section-what {
    background: var(--color-background);
}

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

@media (min-width: 1024px) {
    .what-grid {
        grid-template-columns: 1.5fr 1fr;
        align-items: start;
    }
}

.what-lead {
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.what-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.what-list {
    list-style: none;
    padding: 0;
}

.what-list li {
    position: relative;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.what-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.what-distinction {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
}

.what-distinction h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-lg);
    color: var(--color-text-primary);
}

.distinction-item {
    padding: var(--space-md);
    background: var(--color-background);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.distinction-item:last-child {
    margin-bottom: 0;
}

.distinction-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.distinction-item p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.distinction-wellibuy {
    background: var(--color-accent-subtle);
    border-left: 3px solid var(--color-accent);
}

/* ----------------------------------------
   HOW IT WORKS SECTION
   ---------------------------------------- */
.section-how {
    background: var(--color-surface);
}

.architecture-layers {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.layer {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-xl);
    padding: var(--space-2xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.layer:last-child {
    border-bottom: none;
}

.layer-number {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-border);
    line-height: 1;
    min-width: 60px;
}

.layer-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.layer-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.layer-details {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}

@media (min-width: 600px) {
    .layer-details {
        grid-template-columns: 1fr 1fr;
    }
}

.layer-details li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-light);
    margin-bottom: 0;
}

/* ----------------------------------------
   CAPABILITIES SECTION
   ---------------------------------------- */
.section-capabilities {
    background: var(--color-background);
}

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

@media (min-width: 600px) {
    .capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .capabilities-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.capability {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.capability:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.capability-title {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.capability-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ----------------------------------------
   USE CASES SECTION
   ---------------------------------------- */
.section-usecases {
    background: var(--color-surface);
}

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

.usecase {
    background: var(--color-background);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
}

.usecase-header {
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
    cursor: pointer;
}

.usecase-title {
    font-size: var(--text-lg);
    margin: 0;
}

.usecase-content {
    padding: var(--space-xl);
}

.usecase-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: var(--leading-relaxed);
}

.usecase-examples {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}

@media (min-width: 600px) {
    .usecase-examples {
        grid-template-columns: repeat(2, 1fr);
    }
}

.usecase-examples li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-lg);
    position: relative;
    margin-bottom: 0;
}

.usecase-examples li::before {
    content: "•";
    position: absolute;
    left: var(--space-sm);
    color: var(--color-accent);
}

/* ----------------------------------------
   PLATFORM SECTION
   ---------------------------------------- */
.section-platform {
    background: var(--color-background);
}

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

@media (min-width: 1024px) {
    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.platform-subtitle {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-accent);
}

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

.platform-item dt {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.platform-item dd {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ----------------------------------------
   WHY PLATFORM SECTION
   ---------------------------------------- */
.section-why {
    background: var(--color-surface);
}

.why-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
}

@media (min-width: 1024px) {
    .why-content {
        grid-template-columns: 1.5fr 1fr;
        align-items: start;
    }
}

.why-explanation {
    max-width: 600px;
}

.why-explanation p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: var(--leading-relaxed);
}

.why-explanation p:first-child {
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    font-weight: 500;
}

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

.comparison-block {
    background: var(--color-background);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.comparison-block h3 {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.comparison-block ul {
    list-style: none;
    padding: 0;
}

.comparison-block li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-light);
    margin-bottom: var(--space-sm);
}

.comparison-platform {
    background: var(--color-accent-subtle);
    border-color: var(--color-accent);
}

.comparison-platform li {
    border-color: var(--color-accent);
}

/* ----------------------------------------
   ROADMAP SECTION
   ---------------------------------------- */
.section-roadmap {
    background: var(--color-background);
}

.roadmap-phases {
    max-width: var(--container-narrow);
    margin: 0 auto;
    position: relative;
}

.roadmap-phases::before {
    content: "";
    position: absolute;
    left: 11px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: var(--color-border);
}

.phase {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-xl);
    padding: var(--space-lg) 0;
}

.phase-marker {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    position: relative;
    z-index: 1;
}

.phase:first-child .phase-marker {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.phase-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xs);
}

.phase-status {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.phase:first-child .phase-status {
    color: var(--color-accent);
}

.phase-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.phase-goals {
    list-style: none;
    padding: 0;
}

.phase-goals li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-border-light);
    margin-bottom: var(--space-sm);
}

/* ----------------------------------------
   ETHICS SECTION
   ---------------------------------------- */
.section-ethics {
    background: var(--color-surface);
}

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

@media (min-width: 600px) {
    .ethics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .ethics-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.ethic {
    padding: var(--space-xl);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
}

.ethic-title {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.ethic-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* ----------------------------------------
   ABOUT SECTION
   ---------------------------------------- */
.section-about {
    background: var(--color-background);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
}

@media (min-width: 1024px) {
    .about-content {
        grid-template-columns: 1.5fr 1fr;
        align-items: start;
    }
}

.about-lead {
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.about-primary p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.about-values {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.about-values h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-lg);
}

.about-values ul {
    list-style: none;
    padding: 0;
}

.about-values li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.about-values li:last-child {
    border-bottom: none;
}

/* ----------------------------------------
   CONTACT SECTION
   ---------------------------------------- */
.section-contact {
    background: var(--color-surface);
}

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

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1.2fr 1fr;
        align-items: start;
    }
}

.contact-subtitle {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.contact-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

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

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

.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.optional {
    font-weight: 400;
    color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: inherit;
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-select {
    cursor: pointer;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-error);
    min-height: 1em;
}

.form-privacy {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

.form-success {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-accent-subtle);
    border-radius: var(--radius-md);
}

.success-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    background: var(--color-success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
}

.form-success h4 {
    margin-bottom: var(--space-sm);
}

.form-success p {
    color: var(--color-text-secondary);
    margin: 0;
}

/* Contact Aside */
.contact-info {
    margin-bottom: var(--space-2xl);
}

.contact-info h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-lg);
}

.info-block {
    margin-bottom: var(--space-lg);
}

.info-block h4 {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.info-block a {
    font-size: var(--text-base);
    color: var(--color-text-primary);
}

.info-block a:hover {
    color: var(--color-accent);
}

.newsletter {
    background: var(--color-background);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
}

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

.newsletter p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-form .form-input {
    flex: 1;
}

.newsletter-form .btn {
    flex-shrink: 0;
}

/* ----------------------------------------
   FOOTER
   ---------------------------------------- */
.footer {
    background: var(--color-text-primary);
    color: white;
    padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr 2fr;
    }
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: var(--text-lg);
    color: white;
    text-decoration: none;
    margin-bottom: var(--space-md);
}

.footer-logo .logo-symbol {
    color: rgba(255, 255, 255, 0.7);
}

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

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

@media (min-width: 600px) {
    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

.footer-nav ul {
    list-style: none;
    padding: 0;
}

.footer-nav li {
    margin-bottom: var(--space-sm);
}

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

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

.footer-bottom {
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

@media (min-width: 600px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.copyright {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.footer-note {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}

/* ----------------------------------------
   ANIMATIONS
   ---------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
    .section-header,
    .pillar,
    .capability,
    .layer,
    .usecase,
    .ethic,
    .phase {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .animate-in {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ----------------------------------------
   UTILITY CLASSES
   ---------------------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ----------------------------------------
   PRINT STYLES
   ---------------------------------------- */
@media print {
    .header,
    .hero-scroll-indicator,
    .nav-toggle {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding-top: var(--space-2xl);
    }
    
    .section {
        padding: var(--space-xl) 0;
    }
    
    body {
        font-size: 12pt;
        color: black;
        background: white;
    }
}