@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --x-teal:   #00f0aa;
      --x-green:  #00ff00;
      --x-yellow: #ffff00;
      --x-red:    #ff0000;
      --x-blue:   #00ffff;
      --x-grey:   #444444;
      --dark:     #000000;
      --panel:    #050a0a;
      --border:   #00f0aa;
      --text:     #00f0aa;
      --dim:      #008855;
      --nav-h:    60px;
    }

    html { scroll-behavior: smooth; }

    body {
      background-color: var(--dark);
      color: var(--text);
      font-family: 'VT323', monospace;
      font-size: 1.4rem;
      line-height: 1.2;
      overflow-x: hidden;
    }

    /* ═══════════════════════════════════════════════
       CRT & SCANLINES
    ═══════════════════════════════════════════════ */
    body::before {
      content: " ";
      display: block;
      position: fixed;
      top: 0; left: 0; bottom: 0; right: 0;
      background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
      z-index: 2000;
      background-size: 100% 4px, 3px 100%;
      pointer-events: none;
    }

    @keyframes flicker {
      0% { opacity: 0.97; }
      5% { opacity: 0.95; }
      10% { opacity: 0.9; }
      15% { opacity: 0.99; }
      20% { opacity: 0.9; }
      25% { opacity: 0.95; }
      30% { opacity: 1; }
      35% { opacity: 0.9; }
      40% { opacity: 0.95; }
      45% { opacity: 1; }
      50% { opacity: 0.9; }
      55% { opacity: 0.95; }
      60% { opacity: 0.99; }
      65% { opacity: 0.9; }
      70% { opacity: 0.95; }
      75% { opacity: 1; }
      80% { opacity: 0.9; }
      85% { opacity: 0.95; }
      90% { opacity: 0.99; }
      95% { opacity: 0.9; }
      100% { opacity: 1; }
    }

    .crt-flicker {
      animation: flicker 0.1s infinite;
    }

    /* ═══════════════════════════════════════════════
       NAV
    ═══════════════════════════════════════════════ */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      height: var(--nav-h);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 1rem;
      background: var(--dark);
      border-bottom: 2px solid var(--border);
    }

    .nav-logo {
      font-size: 2.2rem;
      color: var(--x-yellow);
      text-decoration: none;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      text-shadow: 2px 2px var(--dark), 4px 4px var(--dim);
    }
    .nav-logo span { color: var(--x-red); }

    .nav-links {
      display: flex;
      gap: 0.5rem;
      list-style: none;
    }
    .nav-links a {
      font-size: 1.2rem;
      text-transform: uppercase;
      color: var(--dim);
      text-decoration: none;
      padding: 0.2rem 0.5rem;
      border: 1px solid transparent;
      transition: all 0.1s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--x-yellow);
      background: var(--x-grey);
      border: 1px solid var(--x-yellow);
    }

    /* ═══════════════════════════════════════════════
       HERO
    ═══════════════════════════════════════════════ */
    header {
      position: relative;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 2rem;
      background: 
        radial-gradient(circle, transparent 20%, var(--dark) 20%, var(--dark) 80%, transparent 80%, transparent) 0% 0% / 64px 64px,
        radial-gradient(circle, transparent 20%, var(--dark) 20%, var(--dark) 80%, transparent 80%, transparent) 32px 32px / 64px 64px,
        linear-gradient(var(--dim) 2px, transparent 2px) 0px -1px / 32px 32px,
        linear-gradient(90deg, var(--dim) 2px, var(--dark) 2px) -1px 0px / 32px 32px;
      background-color: var(--dark);
      opacity: 0.8;
    }

    .hero-badge {
      font-size: 1.2rem;
      color: var(--x-blue);
      margin-bottom: 1rem;
      border: 1px solid var(--x-blue);
      padding: 0.2rem 1rem;
      background: rgba(0,0,0,0.8);
    }

    h1 {
      font-size: clamp(4rem, 15vw, 8rem);
      color: var(--x-yellow);
      text-shadow: 4px 4px var(--x-red), 8px 8px var(--dark);
      margin-bottom: 1rem;
    }

    .hero-tagline {
      font-size: 2rem;
      color: var(--x-teal);
      text-transform: uppercase;
      margin-bottom: 2rem;
    }
    .hero-tagline em { color: var(--x-red); font-style: normal; }

    .hero-cta {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      justify-content: center;
    }

    .btn {
      font-family: 'VT323', monospace;
      font-size: 1.5rem;
      padding: 0.5rem 2rem;
      text-decoration: none;
      text-transform: uppercase;
      border: 3px solid;
      cursor: pointer;
      position: relative;
      background: var(--x-grey);
      transition: all 0.1s;
    }
    .btn-primary {
      color: var(--x-yellow);
      border-color: var(--x-yellow);
      box-shadow: 4px 4px 0 var(--dark), 7px 7px 0 var(--x-red);
    }
    .btn-primary:active {
      top: 4px;
      left: 4px;
      box-shadow: 0 0 0 var(--dark);
    }
    .btn-ghost {
      color: var(--x-teal);
      border-color: var(--x-teal);
      box-shadow: 4px 4px 0 var(--dark), 7px 7px 0 var(--x-blue);
    }
    .btn-ghost:active {
      top: 4px;
      left: 4px;
      box-shadow: 0 0 0 var(--dark);
    }

    /* ═══════════════════════════════════════════════
       MAIN CONTENT
    ═══════════════════════════════════════════════ */
    main { max-width: 1000px; margin: 4rem auto; padding: 2rem; }

    section { margin-bottom: 6rem; position: relative; }

    .section-label {
      font-size: 1.2rem;
      color: var(--x-blue);
      text-transform: uppercase;
      margin-bottom: 1rem;
      display: block;
    }

    h2 {
      font-size: 3rem;
      color: var(--x-yellow);
      margin-bottom: 2rem;
      border-bottom: 2px solid var(--border);
      display: inline-block;
    }

    .intro-box {
      border: 4px double var(--border);
      padding: 2rem;
      background: var(--panel);
      position: relative;
    }
    .intro-box::after {
      content: "[ X-COM INTERNAL DATABASE ]";
      position: absolute;
      top: -1.2rem;
      left: 1rem;
      background: var(--dark);
      padding: 0 0.5rem;
      color: var(--x-yellow);
      font-size: 1rem;
    }

    /* ── CARDS ── */
    .era-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
    }

    .era-card {
      border: 2px solid var(--border);
      background: var(--panel);
      padding: 1.5rem;
      box-shadow: 8px 8px 0 var(--dark), 11px 11px 0 var(--x-grey);
    }

    .era-card-header {
      border-bottom: 1px solid var(--border);
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
    }
    .era-card-header h3 { font-size: 1.8rem; color: var(--x-yellow); }
    .era-card-header small { color: var(--x-blue); font-size: 1rem; }

    .game-list { list-style: none; }
    .game-list li {
      margin-bottom: 1rem;
      padding-left: 1.5rem;
      position: relative;
    }
    .game-list li::before {
      content: ">";
      position: absolute;
      left: 0;
      color: var(--x-yellow);
    }

    /* ── MECHANICS ── */
    .mechanics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
    }

    .mechanic-card {
      border: 1px solid var(--dim);
      padding: 1rem;
      background: rgba(0, 136, 85, 0.1);
    }
    .mechanic-card h3 { color: var(--x-yellow); font-size: 1.6rem; margin-bottom: 0.5rem; }
    .mechanic-label { color: var(--x-red); font-size: 0.9rem; margin-bottom: 0.2rem; display: block; }

    /* ── TIMELINE ── */
    .timeline { border-left: 2px solid var(--border); padding-left: 1.5rem; }
    .timeline-item { margin-bottom: 2rem; position: relative; }
    .timeline-item::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--x-yellow);
      position: absolute;
      left: -2.1rem;
      top: 0.5rem;
    }
    .timeline-year { color: var(--x-yellow); font-size: 1.8rem; }

    /* ── QUOTE ── */
    blockquote {
      border: 4px double var(--x-red);
      padding: 2rem;
      background: rgba(255,0,0,0.05);
      font-style: italic;
      color: #fff;
    }
    blockquote cite { color: var(--x-red); display: block; margin-top: 1rem; text-align: right; }

    /* ── FOOTER ── */
    footer {
      border-top: 4px double var(--border);
      padding: 3rem;
      text-align: center;
      background: var(--panel);
    }
    .footer-logo { font-size: 2rem; color: var(--x-yellow); margin-bottom: 1rem; }

    /* ── ANIMATIONS ── */
    .fade-in { opacity: 0; transform: scale(0.95); transition: all 0.5s ease-out; }
    .fade-in.visible { opacity: 1; transform: scale(1); }

    /* ── MISC ── */
    #back-to-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      background: var(--x-grey);
      border: 2px solid var(--x-yellow);
      color: var(--x-yellow);
      padding: 0.5rem;
      cursor: pointer;
      font-family: 'VT323', monospace;
      font-size: 1.5rem;
      z-index: 1001;
    }

    .nav-toggle { display: none; }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0; }
    }
    .blink { animation: blink 1s step-end infinite; }

    /* ── MOBILE ── */
    @media (max-width: 600px) {
      nav { flex-direction: column; height: auto; padding: 1rem; }
      .nav-links { flex-wrap: wrap; justify-content: center; }
      main { margin-top: 120px; }
    }