:root{
      --bg:#070512; --bg2:#0d0a1f; --bg3:#140d2b;
      --surface:rgba(255,255,255,.045); --surface2:rgba(255,255,255,.07);
      --border:rgba(255,255,255,.09); --border2:rgba(255,255,255,.16);
      --primary:#7c5cff; --primary2:#9d7bff; --accent:#22d3ee; --accent2:#e879f9; --gold:#f5c74e;
      --text:#ecebf5; --muted:#a6a1c0; --muted2:#7e7997;
      --grad:linear-gradient(120deg,#9d7bff 0%,#22d3ee 55%,#e879f9 100%);
      --grad-soft:linear-gradient(135deg,rgba(124,92,255,.18),rgba(34,211,238,.10));
      --shadow:0 24px 60px -20px rgba(0,0,0,.65);
      --radius:20px;
      --maxw:1200px;
      font-family:'Pretendard','Space Grotesk',system-ui,-apple-system,sans-serif;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{background:var(--bg);color:var(--text);overflow-x:hidden;line-height:1.6;-webkit-font-smoothing:antialiased}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    h1,h2,h3,.display{font-family:'Space Grotesk','Pretendard',sans-serif;letter-spacing:-.01em;line-height:1.12}
    .mono{font-family:'JetBrains Mono',monospace}
    .container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
    .grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
    .muted{color:var(--muted)}
    section{position:relative;padding:120px 0}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:'JetBrains Mono',monospace;font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);padding:7px 16px;border:1px solid var(--border2);border-radius:100px;background:var(--surface);margin-bottom:22px}
    .eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
    .sec-title{font-size:clamp(30px,4.4vw,52px);font-weight:700;margin-bottom:18px}
    .sec-sub{color:var(--muted);font-size:clamp(15px,1.6vw,18px);max-width:680px}
    .center{text-align:center}.center .sec-sub{margin:0 auto}

    /* ambient background glows */
    .bg-orbs{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
    .orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.5;animation:float 18s ease-in-out infinite}
    .orb.a{width:560px;height:560px;background:#5b3df0;top:-160px;left:-120px}
    .orb.b{width:520px;height:520px;background:#1597b8;top:40%;right:-160px;animation-delay:-6s}
    .orb.c{width:480px;height:480px;background:#b13fd0;bottom:-160px;left:30%;animation-delay:-12s}
    @keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(40px,-40px)}}
    .grid-overlay{position:fixed;inset:0;z-index:-1;pointer-events:none;
      background-image:linear-gradient(rgba(124,92,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(124,92,255,.05) 1px,transparent 1px);
      background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 40%,transparent 100%)}

    /* NAV */
    header.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.35s}
    .nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
    .brand{display:flex;align-items:center;gap:12px;font-family:'Space Grotesk';font-weight:700;font-size:20px;letter-spacing:.02em}
    .brand img{height:30px;width:auto}
    .nav-links{display:flex;align-items:center;gap:6px}
    .nav-links a{padding:9px 16px;border-radius:100px;font-size:15px;color:var(--muted);transition:.2s}
    .nav-links a:hover{color:#fff;background:var(--surface)}
    .nav-cta{padding:10px 22px!important;background:var(--grad);color:#fff!important;font-weight:600;box-shadow:0 8px 24px -8px rgba(124,92,255,.7)}
    .nav-cta:hover{filter:brightness(1.08);transform:translateY(-1px)}
    header.nav.scrolled{background:rgba(10,7,22,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--border)}
    .burger{display:none;font-size:24px;background:none;border:0;color:#fff;cursor:pointer}

    /* HERO */
    .hero{min-height:100vh;display:flex;align-items:center;padding-top:90px;overflow:hidden}
    .hero-bg{position:absolute;inset:0;z-index:-1;background:url('../img/gg_hero_bg.png') center/cover no-repeat}
    .hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,5,18,.55) 0%,rgba(7,5,18,.35) 40%,rgba(7,5,18,.92) 100%)}
    .hero-inner{position:relative;text-align:center;width:100%}
    .hero img.logo{height:84px;width:auto;margin:0 auto 30px;filter:drop-shadow(0 6px 30px rgba(124,92,255,.5));animation:rise .9s ease both}
    .hero h1{font-size:clamp(46px,9vw,118px);font-weight:700;letter-spacing:-.02em;animation:rise .9s .05s ease both}
    .hero .slogan{font-family:'JetBrains Mono';font-size:clamp(14px,2vw,19px);color:var(--accent);letter-spacing:.12em;margin-top:14px;animation:rise .9s .15s ease both}
    .hero .lead{color:var(--muted);font-size:clamp(15px,1.8vw,19px);max-width:620px;margin:26px auto 0;animation:rise .9s .25s ease both}
    .chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:34px;animation:rise .9s .35s ease both}
    .chip{font-family:'JetBrains Mono';font-size:13.5px;padding:9px 18px;border:1px solid var(--border2);border-radius:100px;background:var(--surface);backdrop-filter:blur(6px);transition:.25s}
    .chip i{margin-right:7px}
    .chip:hover{border-color:var(--primary2);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px -12px rgba(124,92,255,.6)}
    .hero-actions{display:flex;gap:14px;justify-content:center;margin-top:38px;flex-wrap:wrap;animation:rise .9s .45s ease both}
    .btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:100px;font-weight:600;font-size:15px;transition:.25s;cursor:pointer;border:1px solid transparent}
    .btn-primary{background:var(--grad);color:#fff;box-shadow:0 14px 34px -12px rgba(124,92,255,.75)}
    .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08)}
    .btn-ghost{background:var(--surface);border-color:var(--border2);color:#fff}
    .btn-ghost:hover{background:var(--surface2);transform:translateY(-2px)}
    .scroll-ind{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);color:var(--muted);font-size:22px;animation:bob 2s infinite}
    @keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}
    @keyframes rise{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}

    /* STATS */
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .stat{padding:34px 22px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);backdrop-filter:blur(8px)}
    .stat .num{font-family:'Space Grotesk';font-size:clamp(38px,5vw,60px);font-weight:700;line-height:1}
    .stat .lbl{color:var(--muted);margin-top:10px;font-size:14.5px}

    /* generic card grid */
    .grid{display:grid;gap:22px}
    .g3{grid-template-columns:repeat(3,1fr)}
    .card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:34px;transition:.3s;position:relative;overflow:hidden}
    .card:hover{transform:translateY(-6px);border-color:var(--border2);background:var(--surface2);box-shadow:var(--shadow)}
    .card .ic{width:56px;height:56px;border-radius:15px;display:grid;place-items:center;font-size:24px;background:var(--grad-soft);border:1px solid var(--border2);color:var(--primary2);margin-bottom:20px}
    .card h3{font-size:20px;margin-bottom:10px}
    .card p{color:var(--muted);font-size:15px}
    .card .idx{position:absolute;top:22px;right:26px;font-family:'JetBrains Mono';font-size:13px;color:var(--muted2)}

    /* services */
    .svc-grid{grid-template-columns:repeat(3,1fr)}
    .svc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:.3s;position:relative;overflow:hidden}
    .svc::before{content:'';position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:.3s}
    .svc:hover{transform:translateY(-6px);border-color:var(--primary)}
    .svc:hover::before{opacity:1}
    .svc>*{position:relative}
    .svc .ic{width:60px;height:60px;border-radius:16px;display:grid;place-items:center;font-size:26px;color:#fff;margin-bottom:20px;background:linear-gradient(135deg,var(--primary),var(--accent))}
    .svc h3{font-size:21px;margin-bottom:8px;display:flex;align-items:center;gap:10px}
    .svc .tag{font-family:'JetBrains Mono';font-size:11px;color:var(--accent);border:1px solid var(--border2);padding:3px 9px;border-radius:100px}
    .svc p{color:var(--muted);font-size:14.5px}

    /* timeline */
    .timeline{position:relative;max-width:880px;margin:0 auto;padding-left:8px}
    .timeline::before{content:'';position:absolute;left:96px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--primary),transparent)}
    .tl-item{position:relative;padding:0 0 30px 132px;opacity:0;transform:translateY(20px);transition:.6s}
    .tl-item.in{opacity:1;transform:none}
    .tl-item .yr{position:absolute;left:0;top:-2px;width:74px;text-align:right;font-family:'Space Grotesk';font-weight:700;font-size:21px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
    .tl-item::before{content:'';position:absolute;left:90px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px rgba(124,92,255,.18),0 0 16px var(--primary)}
    .tl-item .body{color:var(--muted);font-size:15px}

    /* portfolio */
    .work-grid{grid-template-columns:repeat(4,1fr)}
    .work{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--border);aspect-ratio:4/3;background:var(--bg2);transition:.35s}
    .work img{width:100%;height:100%;object-fit:cover;transition:.5s;opacity:.92}
    .work:hover{transform:translateY(-5px);border-color:var(--primary);box-shadow:var(--shadow)}
    .work:hover img{transform:scale(1.07);opacity:1}
    .work .ov{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:18px;background:linear-gradient(180deg,transparent 35%,rgba(7,5,18,.92));opacity:0;transition:.35s}
    .work:hover .ov{opacity:1}
    .work .cat{font-family:'JetBrains Mono';font-size:11px;color:var(--accent);margin-bottom:6px}
    .work .nm{font-size:14px;font-weight:600;line-height:1.35}

    /* clients */
    .clients{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
    .client{padding:14px 26px;border:1px solid var(--border);border-radius:100px;background:var(--surface);font-size:15px;font-weight:500;color:var(--muted);transition:.25s}
    .client:hover{color:#fff;border-color:var(--primary2);background:var(--surface2);transform:translateY(-2px)}

    /* contact */
    .contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:30px}
    .form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:34px}
    .field{margin-bottom:16px}
    .field label{display:block;font-size:13px;color:var(--muted);margin-bottom:7px}
    .field input,.field textarea{width:100%;background:rgba(0,0,0,.25);border:1px solid var(--border);border-radius:12px;padding:13px 15px;color:#fff;font-family:inherit;font-size:15px;transition:.2s}
    .field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);background:rgba(124,92,255,.06)}
    .info-row{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
    .info-row .ic{width:44px;height:44px;flex:0 0 44px;border-radius:12px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid var(--border2);color:var(--primary2)}
    .info-row b{display:block;font-size:15px;margin-bottom:2px}
    .info-row span{color:var(--muted);font-size:14px}
    .map{margin-top:22px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);height:240px}
    .map iframe{width:100%;height:100%;border:0;filter:grayscale(.3) invert(.92) hue-rotate(180deg)}

    /* footer */
    footer{border-top:1px solid var(--border);padding:60px 0 34px;background:var(--bg2)}
    .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;margin-bottom:40px}
    .foot-grid h4{font-size:15px;margin-bottom:16px;color:#fff}
    .foot-grid p,.foot-grid a{color:var(--muted);font-size:14px;margin-bottom:9px;display:block}
    .foot-grid a:hover{color:#fff}
    .copyright{text-align:center;color:var(--muted2);font-size:13px;padding-top:26px;border-top:1px solid var(--border)}

    /* ===== Light sections (balance the dark theme) ===== */
    section.light{background:#f5f4fb;color:#1b1630}
    section.light .sec-title{color:#1b1630}
    section.light .sec-sub,section.light .muted{color:#5e5980}
    section.light .eyebrow{background:#fff;border-color:#e7e3f4;color:#6d4bd0}
    section.light .eyebrow::before{background:#6d4bd0;box-shadow:0 0 10px #6d4bd0}
    section.light .card,section.light .svc,section.light .stat{background:#fff;border-color:#ebe7f6;box-shadow:0 12px 32px -16px rgba(70,50,150,.16);backdrop-filter:none}
    section.light .card:hover,section.light .svc:hover{background:#fff;border-color:#c9bdf2;box-shadow:0 26px 52px -18px rgba(70,50,150,.30)}
    section.light .card p,section.light .svc p{color:#5e5980}
    section.light .card .idx{color:#b9b2d6}
    section.light .svc::before{background:linear-gradient(135deg,rgba(124,92,255,.07),rgba(34,211,238,.05))}
    section.light .work{border-color:#e3def3;background:#ece9f6}
    section.light .client{background:#fff;border-color:#e7e3f4;color:#4a4567}
    section.light .client:hover{color:#1b1630;border-color:#9d7bff;background:#faf9ff}

    /* ===== Products (self-developed, for sale) ===== */
    .product-feature{display:grid;grid-template-columns:1.05fr 1fr;border-radius:24px;overflow:hidden;border:1px solid var(--border2);background:linear-gradient(135deg,rgba(124,92,255,.12),rgba(34,211,238,.05));box-shadow:var(--shadow)}
    .pf-media{position:relative;min-height:360px;background:#0d0a1f}
    .pf-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
    .badge-sale{position:absolute;top:18px;left:18px;z-index:2;display:inline-flex;align-items:center;gap:8px;font-family:'JetBrains Mono';font-size:12.5px;font-weight:600;color:#fff;padding:8px 16px;border-radius:100px;background:linear-gradient(135deg,#16a34a,#22d3ee);box-shadow:0 8px 22px -8px rgba(34,211,238,.7)}
    .badge-sale .dot{width:7px;height:7px;border-radius:50%;background:#fff;animation:pulse 1.6s infinite}
    @keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
    .pf-body{padding:46px}
    .pf-brand{font-family:'Space Grotesk';font-weight:700;letter-spacing:.07em;font-size:15px;color:var(--accent)}
    .pf-body h3{font-size:clamp(24px,3vw,32px);margin:8px 0 14px}
    .pf-body>p{color:var(--muted);margin-bottom:20px}
    .pf-points{list-style:none;display:grid;gap:10px;margin-bottom:22px}
    .pf-points li{position:relative;padding-left:26px;color:var(--muted);font-size:14.5px}
    .pf-points li::before{content:'\f00c';font-family:'Font Awesome 6 Free';font-weight:900;position:absolute;left:0;top:2px;color:var(--accent);font-size:12px}
    .pf-meta{font-size:13.5px;color:var(--muted2);border-top:1px solid var(--border);padding-top:16px;margin-bottom:22px}
    .pf-meta b{color:var(--text);font-weight:600}
    .pf-actions{display:flex;gap:12px;flex-wrap:wrap}
    @media(max-width:820px){.product-feature{grid-template-columns:1fr}.pf-media{min-height:240px}.pf-media img{position:static;height:auto;min-height:240px}.pf-body{padding:30px}}

    /* reveal */
    .reveal{opacity:0;transform:translateY(30px);transition:.7s cubic-bezier(.2,.7,.2,1)}
    .reveal.in{opacity:1;transform:none}

    @media(max-width:920px){
      .nav-links{position:fixed;top:74px;right:0;flex-direction:column;align-items:stretch;width:240px;height:calc(100vh - 74px);background:rgba(10,7,22,.96);backdrop-filter:blur(20px);padding:20px;gap:6px;transform:translateX(110%);transition:.35s;border-left:1px solid var(--border)}
      .nav-links.open{transform:none}
      .burger{display:block}
      .stats{grid-template-columns:repeat(2,1fr)}
      .g3,.svc-grid{grid-template-columns:1fr}
      .work-grid{grid-template-columns:repeat(2,1fr)}
      .contact-grid{grid-template-columns:1fr}
      .timeline::before{left:7px}.tl-item{padding-left:40px}.tl-item::before{left:1px}
      .tl-item .yr{position:static;width:auto;text-align:left;display:block;margin-bottom:6px}
      section{padding:84px 0}
    }
    @media(max-width:520px){.work-grid{grid-template-columns:1fr}}