: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: #E5E7EB;
      --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-primary);
      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; }
    
    .grid-overlay {
      position: fixed; top: 0; left: 0; width: 100%; height: 100%;
      pointer-events: none; z-index: -1;
      background-image: 
        linear-gradient(to right, rgba(128, 128, 128, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(128, 128, 128, 0.05) 1px, transparent 1px);
      background-size: 40px 40px;
      animation: grid-pan 60s linear infinite;
    }
    @keyframes grid-pan { from { background-position: 0 0; } to { background-position: 40px 40px; } }

    .eyebrow { 
      font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent-blue); 
      font-weight: 700; margin-bottom: 1rem; display: block; 
      text-transform: uppercase; letter-spacing: 0.1em;
    }
    .title { 
      font-size: clamp(2.5rem, 5vw, 4.2rem); font-weight: 800; 
      letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 1.5rem; 
    }
    .subtitle { 
      font-size: 1.25rem; color: var(--text-light-secondary); 
      max-width: 80ch; line-height: 1.7; 
    }
    .btn { 
      display: inline-flex; align-items: center; gap: 0.75rem; 
      padding: 1rem 2.5rem; background-color: var(--accent-blue); 
      color: var(--text-light); border: 2px solid var(--accent-blue); 
      border-radius: var(--radius-lg); font-weight: 700; 
      text-decoration: none; transition: var(--transition); cursor: pointer; 
      white-space: nowrap;
    }
    .btn:hover { 
      background-color: #1D4ED8; border-color: #1D4ED8; 
      transform: translateY(-3px); box-shadow: 0 8px 16px rgba(59, 130, 246, 0.2);
    }
    .btn-secondary { 
      background-color: transparent; color: var(--accent-blue); 
      border-color: var(--accent-blue);
    }
    .btn-secondary:hover { 
      background-color: rgba(37, 99, 235, 0.1); color: var(--accent-blue);
      transform: translateY(-3px); box-shadow: none;
    }
    .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 { 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);
    }
    .header.scrolled .nav-logo-text { color: var(--text-light); }
    .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); }
    .header.scrolled .nav-btn { border-color: var(--text-light); color: var(--text-light); }
    .header.scrolled .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); }
    .header.scrolled .nav-icon-btn { color: var(--text-light); }
    .header.scrolled .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 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; }
    .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); }
    .nav-menu, .nav-overlay, .nav-actions-mobile, .mega-menu { display: none !important; }



    
    .tech-hero-section {
        padding-top: calc(var(--header-height) + 100px);
        padding-bottom: 100px;
        background-color: var(--bg-dark);
        color: var(--text-light);
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .tech-hero-section .title {
        color: var(--text-light);
        font-family: var(--font-mono);
        font-weight: 700;
    }
    .tech-hero-section .subtitle {
        margin-top: 1.5rem;
        max-width: 70ch;
        margin-left: auto;
        margin-right: auto;
        color: var(--text-light-secondary);
    }
    .data-lock-container {
        width: 200px;
        height: 200px;
        margin: 3rem auto 0;
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .data-lock-ring {
        position: absolute;
        border-radius: 50%;
        border-style: solid;
        border-color: var(--border-dark);
    }
    .data-lock-ring.ring-1 {
        width: 100%; height: 100%;
        border-width: 2px;
        animation: rotate 20s linear infinite;
    }
    .data-lock-ring.ring-2 {
        width: 80%; height: 80%;
        border-width: 3px;
        border-color: var(--accent-blue);
        border-style: dashed;
        animation: rotate-reverse 15s linear infinite;
    }
    .data-lock-ring.ring-3 {
        width: 60%; height: 60%;
        border-width: 1px;
        animation: rotate 25s linear infinite;
    }
    .data-lock-core {
        width: 40%; height: 40%;
        background-color: var(--accent-blue);
        border-radius: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 2.5rem;
        color: var(--text-light);
        box-shadow: 0 0 20px var(--accent-blue), 0 0 40px rgba(59, 130, 246, 0.5);
        animation: pulse-core 3s infinite ease-in-out;
    }
    @keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
    @keyframes rotate-reverse { from { transform: rotate(0deg); } to { transform: rotate(-360deg); } }
    @keyframes pulse-core {
        0%, 100% { transform: scale(0.95); box-shadow: 0 0 20px var(--accent-blue), 0 0 40px rgba(59, 130, 246, 0.5); }
        50% { transform: scale(1.05); box-shadow: 0 0 30px var(--accent-blue), 0 0 60px rgba(59, 130, 246, 0.7); }
    }

    
    .document-library-section {
        background-color: var(--bg-dark-panel);
        border-top: 1px solid var(--border-dark);
        border-bottom: 1px solid var(--border-dark);
    }
    .doc-filters {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1rem;
        margin-bottom: 4rem;
    }
    .doc-filter-btn {
        background: transparent;
        border: 1px solid var(--border-dark);
        color: var(--text-light-secondary);
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
        font-weight: 600;
        border-radius: var(--radius-lg);
        cursor: pointer;
        transition: var(--transition);
    }
    .doc-filter-btn:hover {
        color: var(--text-light);
        border-color: var(--accent-blue);
    }
    .doc-filter-btn.active {
        background-color: var(--accent-blue);
        color: var(--text-light);
        border-color: var(--accent-blue);
        box-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
    }
    .doc-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
        gap: 2rem;
    }
    .doc-card {
        background-color: var(--bg-dark);
        border: 1px solid var(--border-dark);
        border-radius: var(--radius-lg);
        padding: 2rem;
        display: flex;
        flex-direction: column;
        transition: var(--transition);
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    }
    .doc-card:hover {
        transform: translateY(-8px);
        border-color: var(--accent-blue);
        box-shadow: 0 15px 30px rgba(0,0,0,0.4);
    }
    .doc-card .eyebrow {
        margin-bottom: 0.75rem;
    }
    .doc-card h3 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--text-light);
        margin-bottom: 1rem;
        line-height: 1.3;
        flex-grow: 1; 
    }
    .doc-card p {
        color: var(--text-light-secondary);
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 1.5rem;
    }
    .doc-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-family: var(--font-mono);
        font-size: 0.85rem;
        color: var(--text-light-secondary);
        padding-top: 1.5rem;
        border-top: 1px solid var(--border-dark);
        margin-bottom: 2rem;
    }
    .doc-card .btn {
        width: 100%;
        justify-content: center;
        padding: 0.8rem 1.5rem;
    }


    .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: 992px) {
      .section { padding: 80px 0; }
      .title { font-size: clamp(2rem, 8vw, 2.8rem); }
      .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; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .footer-about { grid-column: 1 / -1; margin-bottom: 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; }
      .doc-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 480px) {
      .container, .container-full { padding: 0 1rem; }
      .btn { padding: 0.8rem 1.5rem; font-size: 0.9rem; }
      .doc-card { padding: 1.5rem; }
      .doc-card h3 { font-size: 1.3rem; }
    }