/* ============================================
   OPEN ENTRY — Premium Institutional Landing Page
   Dark Premium Theme · Institutional Grade · Regulation-First
   ============================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Premium Dark Palette */
    --color-bg: #0b0f1a;
    --color-bg-alt: #0f1424;
    --color-bg-warm: #111729;
    --color-bg-card: #141b2d;
    --color-bg-card-hover: #1a2340;
    --color-surface: #1a2238;
    --color-surface-dark: #111729;
    --color-surface-light: #1e2a45;

    /* Borders */
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-light: rgba(255, 255, 255, 0.04);
    --color-border-strong: rgba(255, 255, 255, 0.1);
    --color-border-glow: rgba(59, 130, 246, 0.15);

    /* Text */
    --color-text: #e8ecf4;
    --color-text-secondary: #8b95b0;
    --color-text-muted: #5c6680;
    --color-text-light: #4a5470;

    /* Accent — Electric Blue */
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-light: #60a5fa;
    --color-accent-bg: rgba(59, 130, 246, 0.08);
    --color-accent-bg-strong: rgba(59, 130, 246, 0.15);
    --color-accent-border: rgba(59, 130, 246, 0.2);
    --color-accent-glow: rgba(59, 130, 246, 0.25);

    /* Semantic */
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.08);
    --color-warning-border: rgba(245, 158, 11, 0.2);
    --color-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.06);
    --color-danger-border: rgba(239, 68, 68, 0.15);
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.08);
    --color-success-border: rgba(16, 185, 129, 0.2);

    /* Special */
    --color-krw: #14b8a6;
    --color-krw-bg: rgba(20, 184, 166, 0.08);
    --color-krw-border: rgba(20, 184, 166, 0.2);
    --color-rlusd: #a78bfa;
    --color-rlusd-bg: rgba(167, 139, 250, 0.08);
    --color-rlusd-border: rgba(167, 139, 250, 0.2);
    --color-blockchain: #60a5fa;
    --color-blockchain-bg: rgba(96, 165, 250, 0.08);
    --color-blockchain-border: rgba(96, 165, 250, 0.2);

    /* Gold accent for premium feel */
    --color-gold: #d4a853;
    --color-gold-bg: rgba(212, 168, 83, 0.06);
    --color-gold-border: rgba(212, 168, 83, 0.15);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

    /* Layout */
    --nav-height: 72px;
    --container-max: 1280px;
    --container-padding: 32px;
    --section-padding: 120px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-accent: 0 4px 24px rgba(59, 130, 246, 0.2);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ---- Section Base ---- */
.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: 100px;
    padding: 6px 16px;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: clamp(0.95rem, 1.6vw, 1.1rem);
    color: var(--color-text-secondary);
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(11, 15, 26, 0.7);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

#site-header.scrolled {
    background: rgba(11, 15, 26, 0.92);
    border-bottom-color: var(--color-border);
    box-shadow: 0 1px 24px rgba(0, 0, 0, 0.4);
}

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

.nav-logo a {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-fast);
}

.logo-mark {
    color: var(--color-accent-light);
    font-size: 1.2em;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links li a {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
    transition: width var(--transition-base);
}

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

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

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

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
    white-space: nowrap;
    font-family: var(--font-primary);
}

.btn svg {
    flex-shrink: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: #fff;
    box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    box-shadow: 0 6px 32px rgba(59, 130, 246, 0.35);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    border-color: var(--color-accent-border);
    color: var(--color-accent-light);
    background: var(--color-accent-bg);
    box-shadow: var(--shadow-glow);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 0.95rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.section-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 60px;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.6;
    mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 0%, transparent 70%);
}

.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(59, 130, 246, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 20% 90%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 80% 90%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.section-hero .container {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: 100px;
    padding: 8px 20px;
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-light);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--color-accent-glow);
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        box-shadow: 0 0 8px var(--color-accent-glow);
    }

    50% {
        opacity: 0.4;
        box-shadow: 0 0 2px var(--color-accent-glow);
    }
}

.hero-headline {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--color-text);
    margin-bottom: 20px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    background: linear-gradient(135deg, #ffffff 0%, #c8d6e5 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subheadline {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--color-accent-light);
    margin-bottom: 16px;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.hero-supporting {
    font-size: clamp(0.95rem, 1.5vw, 1.05rem);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 72px;
}

/* Hero Architecture Preview */
.hero-arch-preview {
    max-width: 680px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--border-radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.hero-arch-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent-glow), transparent);
}

.arch-preview-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.arch-preview-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.arch-preview-node {
    width: 100%;
    padding: 10px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
    transition: all var(--transition-base);
}

.arch-preview-node:hover {
    border-color: var(--color-accent-border);
    color: var(--color-text);
    background: var(--color-surface-light);
}

.arch-preview-node.accent {
    background: var(--color-accent-bg-strong);
    border-color: var(--color-accent-border);
    color: var(--color-accent-light);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.08);
}

.arch-preview-node.blockchain {
    background: var(--color-blockchain-bg);
    border-color: var(--color-blockchain-border);
    color: var(--color-blockchain);
}

.arch-preview-arrow {
    color: var(--color-text-light);
    line-height: 0;
    padding: 2px 0;
}

.arch-preview-arrow svg {
    width: 16px;
    height: 16px;
}

.arch-preview-side-label {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.arch-preview-side-label span {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    padding: 4px 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
}

/* ============================================
   WHY THIS MATTERS NOW
   ============================================ */
.section-why-now {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.section-why-now::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(59, 130, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.why-now-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.why-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: 36px 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.why-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.why-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top left, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.why-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-3px);
}

.why-card:hover::before {
    opacity: 1;
}

.why-card:hover::after {
    opacity: 1;
}

.why-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--border-radius-lg);
    color: var(--color-accent-light);
    margin-bottom: 20px;
}

.why-card-number {
    font-size: 0.72rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-text-light);
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}

.why-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.3;
}

.why-card p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.why-card-tags {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 4px 12px;
    border-radius: 100px;
}

.tag-krw {
    background: var(--color-krw-bg);
    color: var(--color-krw);
    border: 1px solid var(--color-krw-border);
}

.tag-rlusd {
    background: var(--color-rlusd-bg);
    color: var(--color-rlusd);
    border: 1px solid var(--color-rlusd-border);
}

/* ============================================
   WHAT WE BUILD
   ============================================ */
.section-what-we-build {
    background: var(--color-bg);
    position: relative;
}

.section-what-we-build::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 50% 30% at 80% 20%, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* Pillars Grid */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.pillar-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: 36px 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.pillar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.pillar-card:hover {
    border-color: var(--color-accent-border);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-3px);
}

.pillar-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent-bg-strong) 0%, var(--color-accent-bg) 100%);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--border-radius-lg);
    color: var(--color-accent-light);
    margin-bottom: 24px;
    position: relative;
}

.pillar-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    position: relative;
}

.pillar-card>p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 20px;
    position: relative;
}

.pillar-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    position: relative;
}

.detail-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.detail-value {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-accent-light);
    font-family: var(--font-mono);
}

/* Off-Chain vs On-Chain */
.chain-separation {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 48px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

.chain-side {
    flex: 1;
    padding: 36px 32px;
    text-align: center;
    position: relative;
}

.chain-side.off-chain {
    background: var(--color-surface);
}

.chain-side.on-chain {
    background: var(--color-accent-bg);
}

.chain-label {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.off-chain .chain-label {
    color: var(--color-text-muted);
}

.on-chain .chain-label {
    color: var(--color-accent-light);
}

.chain-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    border-radius: 50%;
}

.off-chain .chain-icon {
    background: var(--color-surface-light);
    border: 1px solid var(--color-border-strong);
    color: var(--color-text-secondary);
}

.on-chain .chain-icon {
    background: var(--color-accent-bg-strong);
    border: 1px solid var(--color-accent-border);
    color: var(--color-accent-light);
}

.chain-side h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}

.chain-side ul {
    list-style: none;
}

.chain-side ul li {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
}

.chain-side ul li:last-child {
    border-bottom: none;
}

.chain-divider {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
    width: 1px;
    position: relative;
}

.divider-line {
    flex: 1;
    width: 1px;
    background: var(--color-border-strong);
}

.divider-badge {
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    background: var(--color-bg);
    border: 1px solid var(--color-border-strong);
    border-radius: 100px;
    padding: 6px 12px;
    white-space: nowrap;
    writing-mode: vertical-lr;
    text-orientation: mixed;
    transform: rotate(180deg);
}

/* Notice Box */
.notice-box {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.notice-box-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    background: rgba(245, 158, 11, 0.06);
    border-bottom: 1px solid var(--color-warning-border);
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-warning);
}

.notice-box-items {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.notice-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--color-text);
}

.notice-item svg {
    color: var(--color-danger);
    flex-shrink: 0;
}

/* ============================================
   CORE ARCHITECTURE
   ============================================ */
.section-architecture {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 100px;
    position: relative;
}

.section-architecture::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 40% 30% at 10% 50%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse 40% 30% at 90% 50%, rgba(124, 58, 237, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.architecture-main {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 32px;
    align-items: start;
    position: relative;
}

/* Architecture Layers */
.arch-layers {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.arch-layer {
    position: relative;
}

.layer-connector {
    width: 2px;
    height: 16px;
    background: linear-gradient(180deg, var(--color-accent-border), var(--color-border-strong));
    margin: 0 auto;
    position: relative;
}

.layer-connector::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-accent-border);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.15);
}

.arch-layer:first-child .layer-connector {
    display: none;
}

.layer-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.layer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, transparent 40%);
    pointer-events: none;
}

.layer-card:hover {
    border-color: var(--color-accent-border);
    box-shadow: var(--shadow-md), 0 0 30px rgba(59, 130, 246, 0.06);
}

.layer-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 4px 12px;
    margin-bottom: 16px;
    position: relative;
}

.layer-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
    position: relative;
}

.layer-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--border-radius);
    color: var(--color-accent-light);
    flex-shrink: 0;
}

.layer-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
}

.layer-components {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    position: relative;
}

.component {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 6px 14px;
    transition: all var(--transition-fast);
}

.component:hover {
    border-color: var(--color-accent-border);
    background: var(--color-accent-bg);
    color: var(--color-accent-light);
}

.component.highlight {
    background: var(--color-accent-bg-strong);
    border-color: var(--color-accent-border);
    color: var(--color-accent-light);
    font-weight: 600;
}

.component.blockchain {
    background: var(--color-blockchain-bg);
    border-color: var(--color-blockchain-border);
    color: var(--color-blockchain);
}

.layer-description {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    position: relative;
}

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

/* Settlement Rails */
.settlement-rails {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
    position: relative;
}

.rail {
    padding: 16px;
    border-radius: var(--border-radius);
    border: 1px solid;
}

.rail-krw {
    background: var(--color-krw-bg);
    border-color: var(--color-krw-border);
}

.rail-rlusd {
    background: var(--color-rlusd-bg);
    border-color: var(--color-rlusd-border);
}

.rail-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.rail-krw .rail-header {
    color: var(--color-krw);
}

.rail-rlusd .rail-header {
    color: var(--color-rlusd);
}

.rail-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.rail-krw .rail-dot {
    background: var(--color-krw);
    box-shadow: 0 0 8px rgba(20, 184, 166, 0.3);
}

.rail-rlusd .rail-dot {
    background: var(--color-rlusd);
    box-shadow: 0 0 8px rgba(167, 139, 250, 0.3);
}

.rail p {
    font-size: 0.78rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Highlighted Layer */
.arch-layer-highlight .layer-card {
    border-color: var(--color-accent-border);
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(59, 130, 246, 0.06) 100%);
    box-shadow: var(--shadow-accent), 0 0 40px rgba(59, 130, 246, 0.08);
}

.arch-layer-highlight .layer-card::before {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, transparent 40%);
}

.arch-layer-highlight .layer-badge {
    background: var(--color-accent-bg-strong);
    border-color: var(--color-accent-border);
    color: var(--color-accent-light);
}

.arch-layer-highlight .layer-icon {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.3);
}

/* Blockchain Layer */
.arch-layer-blockchain .layer-card {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.04) 0%, var(--color-bg-card) 100%);
    border-color: var(--color-blockchain-border);
}

.arch-layer-blockchain .layer-badge {
    background: var(--color-blockchain-bg);
    border-color: var(--color-blockchain-border);
    color: var(--color-blockchain);
}

.arch-layer-blockchain .layer-icon {
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
    border-color: #2563eb;
    color: #fff;
    box-shadow: 0 0 16px rgba(96, 165, 250, 0.2);
}

.blockchain-detail {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 20px;
    position: relative;
}

.bc-detail-item {
    text-align: center;
    padding: 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.bc-label {
    display: block;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.bc-value {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-blockchain);
    font-family: var(--font-mono);
}

/* Architecture Sidebar */
.arch-sidebar {
    position: sticky;
    top: calc(var(--nav-height) + 24px);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-ai .sidebar-header {
    background: var(--color-accent-bg);
    color: var(--color-accent-light);
}

.sidebar-ops .sidebar-header {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.sidebar-header h4 {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sidebar-items {
    padding: 12px 16px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 8px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.sidebar-item:last-child {
    border-bottom: none;
}

.sidebar-item:hover {
    color: var(--color-text);
    background: var(--color-surface);
    border-radius: var(--border-radius);
}

.sidebar-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent-light);
    flex-shrink: 0;
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.3);
}

.sidebar-dot.ops {
    background: var(--color-success);
    box-shadow: 0 0 6px rgba(16, 185, 129, 0.3);
}

/* ============================================
   AI AGENTS
   ============================================ */
.section-ai-agents {
    background: var(--color-bg);
    position: relative;
}

.section-ai-agents::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 60% 40% at 50% 100%, rgba(59, 130, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.ai-disclaimer-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 24px;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--border-radius-lg);
    margin-bottom: 48px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.ai-disclaimer-bar svg {
    color: var(--color-accent-light);
    flex-shrink: 0;
}

.ai-disclaimer-bar p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.ai-disclaimer-bar strong {
    color: var(--color-text);
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
}

.ai-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: 24px;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.02) 0%, transparent 40%);
    pointer-events: none;
}

.ai-card:hover {
    border-color: var(--color-accent-border);
    box-shadow: var(--shadow-md), 0 0 30px rgba(59, 130, 246, 0.06);
    transform: translateY(-3px);
}

.ai-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    position: relative;
}

.ai-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--border-radius);
    color: var(--color-accent-light);
}

.ai-scope {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 4px 10px;
}

.ai-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
    line-height: 1.3;
    position: relative;
}

.ai-card p {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    flex: 1;
    position: relative;
}

.ai-card-footer {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
    position: relative;
}

.ai-layer-tag {
    font-size: 0.7rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

/* ============================================
   GOVERNANCE
   ============================================ */
.section-governance {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.section-governance::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 50% 40% at 50% 0%, rgba(16, 185, 129, 0.03) 0%, transparent 60%);
    pointer-events: none;
}

.governance-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
}

.gov-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: 32px 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.gov-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-success), rgba(16, 185, 129, 0.3));
    border-radius: 3px 0 0 3px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gov-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.gov-card:hover::before {
    opacity: 1;
}

.gov-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: var(--border-radius-lg);
    color: var(--color-success);
    margin-bottom: 20px;
}

.gov-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.gov-card p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 20px;
}

.gov-details {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.gov-details span {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-success);
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: 100px;
    padding: 4px 12px;
}

/* ============================================
   DISCLAIMERS
   ============================================ */
.section-disclaimer {
    background: var(--color-bg);
    padding: 80px 0;
    position: relative;
}

.disclaimer-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    max-width: 1100px;
    margin: 0 auto;
}

.disclaimer-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 24px 20px;
    text-align: center;
    transition: all var(--transition-base);
}

.disclaimer-card:nth-child(-n+3) {
    border-color: var(--color-danger-border);
    background: var(--color-danger-bg);
}

.disclaimer-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.disclaimer-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    border-radius: 50%;
}

.disclaimer-card:nth-child(-n+3) .disclaimer-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.disclaimer-card:nth-child(n+4) .disclaimer-icon {
    background: var(--color-accent-bg);
    color: var(--color-accent-light);
}

.disclaimer-card p {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
}

.disclaimer-card strong {
    font-weight: 700;
}

/* ============================================
   CONTACT
   ============================================ */
.section-contact {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 100px 0;
    position: relative;
}

.section-contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(59, 130, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    position: relative;
}

.contact-left .section-tag {
    margin-bottom: 16px;
}

.contact-title {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.contact-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.contact-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
}

.contact-info-item:last-child {
    border-bottom: none;
}

.contact-info-item:hover {
    background: var(--color-surface);
}

.contact-label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.contact-value {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ============================================
   FOOTER
   ============================================ */
#site-footer {
    background: var(--color-surface-dark);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 60px 0 40px;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-text);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.footer-brand .logo-mark {
    color: var(--color-accent-light);
}

.footer-tagline {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 32px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
}

.footer-links a {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer-bottom p {
    font-size: 0.78rem;
    color: var(--color-text-light);
}

/* ============================================
   ANIMATIONS — Fade In on Scroll
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger delays */
.stagger-1 {
    transition-delay: 0.05s;
}

.stagger-2 {
    transition-delay: 0.1s;
}

.stagger-3 {
    transition-delay: 0.15s;
}

.stagger-4 {
    transition-delay: 0.2s;
}

.stagger-5 {
    transition-delay: 0.25s;
}

.stagger-6 {
    transition-delay: 0.3s;
}

.stagger-7 {
    transition-delay: 0.35s;
}

.stagger-8 {
    transition-delay: 0.4s;
}

/* ============================================
   RESPONSIVE — LARGE TABLET
   ============================================ */
@media (max-width: 1200px) {
    .ai-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .disclaimer-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .disclaimer-card:nth-child(4),
    .disclaimer-card:nth-child(5) {
        grid-column: span 1;
    }
}

/* ============================================
   RESPONSIVE — TABLET
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
        --container-padding: 24px;
    }

    .pillars-grid {
        grid-template-columns: 1fr;
    }

    .why-now-grid {
        grid-template-columns: 1fr;
    }

    .architecture-main {
        grid-template-columns: 1fr;
    }

    .arch-sidebar {
        position: static;
        flex-direction: row;
    }

    .sidebar-section {
        flex: 1;
    }

    .governance-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .disclaimer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .settlement-rails {
        grid-template-columns: 1fr;
    }

    .blockchain-detail {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   RESPONSIVE — MOBILE
   ============================================ */
@media (max-width: 768px) {
    :root {
        --section-padding: 64px;
        --container-padding: 20px;
        --nav-height: 64px;
    }

    /* Nav Mobile */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(11, 15, 26, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all var(--transition-base);
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-links li a {
        font-size: 1rem;
    }

    /* Hero */
    .hero-headline {
        font-size: clamp(1.8rem, 7vw, 2.8rem);
    }

    .hero-cta-group {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

    .hero-arch-preview {
        padding: 20px;
    }

    /* Architecture */
    .arch-sidebar {
        flex-direction: column;
    }

    .layer-components {
        gap: 6px;
    }

    .component {
        font-size: 0.72rem;
        padding: 4px 10px;
    }

    /* AI Grid */
    .ai-grid {
        grid-template-columns: 1fr;
    }

    /* Governance */
    .governance-grid {
        grid-template-columns: 1fr;
    }

    /* Disclaimer */
    .disclaimer-grid {
        grid-template-columns: 1fr;
    }

    /* Chain Separation */
    .chain-separation {
        flex-direction: column;
    }

    .chain-divider {
        width: 100%;
        height: 1px;
        flex-direction: row;
        padding: 0 20px;
    }

    .divider-line {
        height: 1px;
        width: 100%;
    }

    .divider-badge {
        writing-mode: horizontal-tb;
        transform: none;
        white-space: nowrap;
    }

    /* Footer */
    .footer-links {
        gap: 16px;
    }
}

/* ============================================
   RESPONSIVE — SMALL MOBILE
   ============================================ */
@media (max-width: 480px) {
    .hero-headline {
        font-size: 1.6rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .arch-preview-node {
        font-size: 0.72rem;
        padding: 8px 12px;
    }

    .ai-disclaimer-bar {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {

    #site-header,
    .nav-toggle,
    .hero-cta-group,
    .contact-cta {
        display: none;
    }

    .section {
        padding: 40px 0;
        page-break-inside: avoid;
    }

    body {
        font-size: 12px;
        background: #fff;
        color: #000;
    }
}