:root {
            
            --bg-main: #FFFFFF; 
            --bg-soft: #F7F8FA; 
            --bg-dark: #0A0F19; 
            --bg-dark-panel: #111827; 
            --bg-dark-panel-light: #1e293b; 
            
            --text-primary: #121826; 
            --text-secondary: #4B5563; 
            --text-light: #F9FAFB; 
            --text-light-secondary: #A6B0C3; 
            
            --accent-blue: #3B82F6; 
            --accent-green: #22C55E; 
            --accent-purple: #A78BFA; 
            --accent-red: #EF4444; 
            --accent-yellow: #FBBF24; 

            
            --border-color: #374151; 
            --border-dark: #374151; 
            --shadow-light: 0 12px 24px -4px rgba(18, 24, 38, 0.08), 0 8px 16px -4px rgba(18, 24, 38, 0.05);
            --shadow-dark: 0 10px 30px rgba(0,0,0,0.5);

            
            --font-sans: 'Alliance No.1', sans-serif;
            --font-mono: 'Source Code Pro', monospace;

            
            --header-height: 80px;
            --container-width: 1800px;
            --radius-sm: 8px;
            --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: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body.menu-open { overflow: hidden; }
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 2rem; }
        

        .header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            height: var(--header-height);
            background-color: rgba(10, 15, 25, 0.7); 
            backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-dark);
        }
        .navbar { display: flex; justify-content: space-between; align-items: center; height: 100%; }
        .nav-logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
        .nav-logo-text { font-weight: 800; font-size: 1.5rem; color: var(--text-light); transition: color var(--transition); }
        .nav-controls { display: flex; align-items: center; gap: 1rem; }
        .nav-btn {
            padding: 0.6rem 1.5rem; font-weight: 600; text-decoration: none;
            border-radius: var(--radius-sm); 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(--text-primary); }
        .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; }
        .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 var(--transition), visibility var(--transition);
            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); }


        #dynamic-background {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            z-index: -2;
            background: radial-gradient(circle at center, transparent, var(--bg-dark) 70%),
                        linear-gradient(var(--border-color) 1px, transparent 1px),
                        linear-gradient(to right, var(--border-color) 1px, transparent 1px);
            background-size: 100% 100%, 80px 80px, 80px 80px;
        }
        .briefing-container { display: grid; grid-template-columns: 1fr 1fr; position: relative; }
        #hologram-container {
            position: sticky; top: 0; height: 100vh;
            display: flex; justify-content: center; align-items: center; overflow: hidden;
        }
        #hologram-base {
            width: 80%; max-width: 600px; height: 80%; max-height: 600px;
            position: relative; border: 1px solid var(--border-color);
            background: radial-gradient(ellipse at center, rgba(13, 17, 23, 0.5) 0%, rgba(13, 17, 23, 0) 70%);
        }
        .hologram-layer {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            display: flex; justify-content: center; align-items: center;
            opacity: 0; transition: opacity 0.5s ease-in-out;
        }
        .hologram-layer.active { opacity: 1; }
        .hologram-layer svg { width: 80%; height: 80%; overflow: visible; }
        #briefing-content { padding: 10vh 0; }
        .briefing-section {
            min-height: 90vh; display: flex; flex-direction: column;
            justify-content: center; padding: 2rem 4rem;
            border-left: 1px solid var(--border-color);
        }
        .briefing-section .eyebrow {
            font-family: var(--font-mono); font-size: 0.9rem;
            color: var(--text-light-secondary); letter-spacing: 0.1em;
        }
        .briefing-section h3 {
            font-family: var(--font-sans); font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700; margin-bottom: 1.5rem; color: var(--text-light);
            letter-spacing: -0.03em;
        }
        .briefing-section p {
            font-size: 1.1rem; color: var(--text-light-secondary);
            max-width: 55ch; line-height: 1.8;
        }
        .hero-section {
            height: 100vh; display: flex; flex-direction: column;
            justify-content: center; align-items: center; text-align: center;
            padding: 0 2rem;
        }
        .hero-section .eyebrow { color: var(--accent-blue); font-family: var(--font-mono); }
        .hero-section .title {
            font-size: clamp(3.5rem, 8vw, 7rem); font-weight: 800;
            max-width: 20ch; min-height: 2.1em; letter-spacing: -0.05em;
        }
        .hero-section .title .char { display: inline-block; }
        .hero-section .subtitle { max-width: 60ch; margin: 0 auto; color: var(--text-light-secondary); }
        .tia-section { text-align: center; background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-panel) 50%, var(--bg-dark) 100%); }
        #hologram-tia .tia-ghost { opacity: 0.05; stroke: var(--text-light-secondary); }
        #hologram-tia .tia-stream { stroke-dasharray: 200; stroke-dashoffset: 200; stroke: var(--accent-yellow); }
        #hologram-tia .tia-brain { opacity: 0; transform-origin: center; transform: scale(0.5); }
        .data-ticker {
            position: fixed; bottom: 0; left: 0; width: 100%;
            background-color: var(--bg-dark-panel); border-top: 1px solid var(--border-color);
            padding: 0.5rem 0; font-family: var(--font-mono); font-size: 0.8rem;
            color: var(--text-light-secondary); overflow: hidden; white-space: nowrap; z-index: 100;
        }
        .data-ticker-content { display: inline-block; animation: scroll-ticker 60s linear infinite; }
        .data-ticker-content span { margin-right: 3rem; }
        .data-ticker-content .highlight { color: var(--accent-yellow); }
        @keyframes scroll-ticker { from { transform: translateX(0%); } to { transform: translateX(-50%); } }


        .footer { 
            background-color: var(--bg-dark); 
            border-top: 1px solid var(--border-dark); 
            padding: 80px 0; 
            font-size: 0.95rem; 
        }
        .footer .container { color: var(--text-light-secondary); }
        .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-about p { color: var(--text-light-secondary); }
        .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; 
        }
        .footer-bottom span { color: var(--text-light-secondary); }
        .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: 1200px) {
            .briefing-container { grid-template-columns: 4fr 5fr; }
        }
        @media (max-width: 992px) {
            .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; }
            .briefing-container { grid-template-columns: 1fr; }
            #hologram-container { display: none; }
            .briefing-section { min-height: auto; padding: 6rem 2rem; text-align: center; border-left: none; }
            .briefing-section p { margin: 0 auto; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-about { grid-column: 1 / -1; margin-bottom: 2rem; }
        }
        @media (max-width: 768px) {
            .nav-btn { display: none; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 1.5rem; text-align: center; }
        }