:root {
            --bg-dark: #0A0F19;
            --bg-dark-panel: #111827;
            --text-light: #F9FAFB;
            --text-light-secondary: #A6B0C3;
            --accent-blue: #3B82F6;
            --accent-purple: #A78BFA;
            --accent-green: #22C55E;
            --border-dark: #374151;
            --font-sans: 'Alliance No.1', sans-serif;
            --font-mono: 'Source Code Pro', monospace;
            --header-height: 80px;
            --container-width: 1200px;
            --radius-lg: 12px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            position: relative;
        }
        body.menu-open { overflow: hidden; }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 2rem; }
        .section { padding: 120px 0; position: relative; overflow: hidden; }
        .eyebrow {
            font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent-purple);
            font-weight: 700; margin-bottom: 1rem; display: block;
            text-transform: uppercase; letter-spacing: 0.05em;
        }
        .title {
            font-size: clamp(2.5rem, 5vw, 3.8rem); font-weight: 800;
            letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 1.5rem;
            color: var(--text-light);
        }
        .subtitle { font-size: 1.25rem; color: var(--text-light-secondary); max-width: 75ch; line-height: 1.7; }
        .btn {
            display: inline-flex; align-items: center; gap: 0.75rem; padding: 1rem 2.5rem;
            background-color: var(--accent-purple); color: var(--text-light);
            border: 2px solid var(--accent-purple); border-radius: var(--radius-lg);
            font-weight: 700; text-decoration: none; transition: var(--transition);
            cursor: pointer; white-space: nowrap;
        }
        .btn:hover {
            background-color: #9370DB; border-color: #9370DB;
            transform: translateY(-3px); box-shadow: 0 8px 16px rgba(167, 138, 250, 0.3);
        }
        .text-center { text-align: center; }
        .text-center .subtitle { margin-left: auto; margin-right: auto; }


        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--header-height);
            background-color: transparent;
            border-bottom: 1px solid transparent;
            transition: background-color var(--transition), border-color var(--transition);
        }
        .header.scrolled {
            background-color: rgba(10, 15, 25, 0.8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom-color: var(--border-dark);
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .nav-logo a, .nav-logo-text {
            font-weight: 800;
            font-size: 1.5rem;
            color: var(--text-light);
            text-decoration: none;
        }
        .nav-controls {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .nav-btn {
            padding: 0.6rem 1.5rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 8px;
            transition: var(--transition);
            border: 1px solid var(--text-light);
            color: var(--text-light);
            background-color: transparent;
        }
        .nav-btn:hover {
            background-color: var(--text-light);
            color: var(--bg-dark);
        }
        .nav-icon-btn {
            background: none;
            border: none;
            cursor: pointer;
            font-size: 1.2rem;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            transition: color var(--transition), background-color var(--transition);
            border-radius: 50%;
        }
        .nav-icon-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .nav-toggle .fa-xmark { display: none; }
        .menu-open .header .nav-toggle .fa-bars { display: none; }
        .menu-open .header .nav-toggle .fa-xmark { display: block; }
        
        .menu-open .header {
            background-color: transparent;
            border-bottom-color: transparent;
        }
        .menu-open .header .nav-logo-text,
        .menu-open .header .nav-icon-btn,
        .menu-open .header .nav-btn {
            color: var(--text-light);
            border-color: var(--text-light);
        }

        .fullscreen-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background-color: var(--bg-dark);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
            padding: calc(var(--header-height) + 4rem) 2rem 4rem 2rem;
        }
        .fullscreen-menu.is-active {
            opacity: 1;
            visibility: visible;
            pointer-events: all;
        }
        .fullscreen-menu-grid {
            max-width: var(--container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 2rem;
        }
        .fullscreen-menu-col {
            grid-column: span 3;
        }
        .fullscreen-menu-col.main-nav { grid-column: span 4; }
        .fullscreen-menu-col.sub-nav { grid-column: span 2; }
        .fullscreen-menu-col h5 {
            font-family: var(--font-mono);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-light-secondary);
            margin-bottom: 1.5rem;
            font-size: 0.8rem;
        }
        .fullscreen-menu-col ul { list-style: none; padding: 0; }
        .fullscreen-menu-col ul li a {
            display: block;
            text-decoration: none;
            color: var(--text-light);
            transition: color var(--transition), padding-left var(--transition);
        }
        .fullscreen-menu-col ul li a:hover {
            color: var(--accent-blue);
            padding-left: 0.5rem;
        }
        .fullscreen-menu-col.main-nav ul li { margin-bottom: 1rem; }
        .fullscreen-menu-col.main-nav ul li a {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.03em;
        }
        .fullscreen-menu-col.sub-nav ul li { margin-bottom: 0.8rem; }
        .fullscreen-menu-col.sub-nav ul li a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-light-secondary);
        }
        .fullscreen-menu-col.sub-nav ul li a:hover {
            color: var(--text-light);
        }


        #hero-core {
            height: 100vh; min-height: 700px; display: flex; align-items: center;
            justify-content: center; text-align: center; position: relative;
            padding-top: var(--header-height);
        }
        #core-canvas-container {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
        }
        #core-canvas { width: 100%; height: 100%; }
        .hero-content { position: relative; z-index: 2; max-width: 900px; }
        .hero-content .title {
            font-size: clamp(3rem, 7vw, 5.5rem); letter-spacing: -0.05em;
            line-height: 1.05; color: var(--text-light);
            text-shadow: 0 0 20px rgba(10, 15, 25, 0.8);
        }
        .hero-content .subtitle {
            font-size: 1.35rem; color: var(--text-light-secondary);
            margin-top: 1.5rem; text-shadow: 0 0 10px rgba(10, 15, 25, 0.8);
        }
        .hero-actions { margin-top: 3rem; }
        .section-header {
            max-width: 80ch; margin: 0 auto 5rem auto; text-align: center;
        }
        #mission {
            background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-panel) 100%);
        }
        .mission-statement {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }
        .mission-statement h2 {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            font-weight: 700;
            line-height: 1.4;
            letter-spacing: -0.02em;
            color: var(--text-light);
        }
        .mission-statement h2 span {
            color: var(--accent-blue);
        }
        #paradigm { background-color: var(--bg-dark-panel); }
        .paradigm-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
        }
        .paradigm-card {
            background-color: var(--bg-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            text-align: center;
            transition: var(--transition);
        }
        .paradigm-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            border-color: var(--accent-blue);
        }
        .paradigm-card .icon {
            font-size: 3rem;
            color: var(--accent-blue);
            margin-bottom: 1.5rem;
        }
        .paradigm-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
        }
        .paradigm-card p {
            color: var(--text-light-secondary);
            font-size: 1rem;
            line-height: 1.7;
        }
        #kaia-os { background-color: var(--bg-dark); }
        .os-stack-container {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
        }
        .os-stack-container::before {
            content: '';
            position: absolute;
            left: 40px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent-blue), var(--accent-purple), var(--accent-green));
            opacity: 0.3;
        }
        .os-layer {
            position: relative;
            padding-left: 100px;
            margin-bottom: 4rem;
        }
        .os-layer:last-child { margin-bottom: 0; }
        .os-layer-icon {
            position: absolute;
            left: 0;
            top: 0;
            width: 80px;
            height: 80px;
            font-size: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 2px solid var(--border-dark);
            background-color: var(--bg-dark-panel);
        }
        .os-layer:nth-child(1) .os-layer-icon { color: var(--accent-blue); }
        .os-layer:nth-child(2) .os-layer-icon { color: var(--accent-purple); }
        .os-layer:nth-child(3) .os-layer-icon { color: var(--accent-green); }
        .os-layer-content h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .os-layer-content .layer-tagline {
            font-family: var(--font-mono);
            color: var(--text-light-secondary);
            margin-bottom: 1rem;
        }
        .os-layer-content p {
            font-size: 1.1rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .os-layer-content ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 0.75rem;
        }
        .os-layer-content ul li {
            padding-left: 1.5rem;
            position: relative;
            font-size: 0.95rem;
        }
        .os-layer-content ul li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 0.1rem;
            opacity: 0.8;
        }
        .os-layer:nth-child(1) ul li::before { color: var(--accent-blue); }
        .os-layer:nth-child(2) ul li::before { color: var(--accent-purple); }
        .os-layer:nth-child(3) ul li::before { color: var(--accent-green); }
        #governance { background-color: var(--bg-dark-panel); }
        .dual-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: start;
        }
        .grid-col h3 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-dark);
        }
        .mission-center-list, .governance-list {
            list-style: none;
            padding: 0;
        }
        .mission-center-list li, .governance-list li {
            font-size: 1rem;
            color: var(--text-light-secondary);
            margin-bottom: 1rem;
            padding: 0.75rem 1rem;
            background-color: var(--bg-dark);
            border-left: 3px solid var(--accent-purple);
            border-radius: 0 4px 4px 0;
        }
        .mission-center-list li span {
            font-family: var(--font-mono);
            color: var(--text-light);
            display: block;
            font-size: 0.85rem;
        }


        .footer {
            background-color: var(--bg-dark); border-top: 1px solid var(--border-dark);
            padding: 80px 0; font-size: 0.95rem;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 2rem; padding-bottom: 3rem; }
        .footer-about h4 { font-size: 1.5rem; color: var(--text-light); margin-bottom: 1rem; }
        .footer-col h5 { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-light); margin-bottom: 1.5rem; }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { margin-bottom: 1rem; }
        .footer-col ul a { color: var(--text-light-secondary); text-decoration: none; transition: var(--transition); }
        .footer-col ul a:hover { color: var(--text-light); }
        .footer-bottom { padding-top: 2rem; border-top: 1px solid var(--border-dark); display: flex; justify-content: space-between; align-items: center; }
        .social-links { display: flex; gap: 1.5rem; }
        .social-links a { color: var(--text-light-secondary); font-size: 1.2rem; transition: var(--transition); }
        .social-links a:hover { color: var(--text-light); transform: translateY(-2px); }


        @media (max-width: 992px) {
            .footer-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
            .dual-grid { grid-template-columns: 1fr; gap: 3rem; }
            
            .fullscreen-menu-grid {
                grid-template-columns: 1fr;
                gap: 3rem;
            }
            .fullscreen-menu-col,
            .fullscreen-menu-col.main-nav,
            .fullscreen-menu-col.sub-nav {
                grid-column: span 1;
            }
            .fullscreen-menu-col.main-nav ul li a {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 1.5rem; text-align: center; }
            .nav-btn { display: none; }
            .hero-content .title { font-size: clamp(2.5rem, 10vw, 3.5rem); }
            .os-stack-container::before { left: 20px; }
            .os-layer { padding-left: 60px; }
            .os-layer-icon { width: 40px; height: 40px; font-size: 1.5rem; left: 0; }
        }