:root{
  --dark:#0e1217; --red:#cf2e2e; --white:#ffffff; --lt-blue:#eaf4ff;
  --lt-red:#ffe8e8; --lt-green:#e8f6ec; --text:#e9eef5; --muted:#a6b0bd;
  --card:#151b23; --border:#243041; --focus:#4aa3ff;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--dark);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Inter,Arial,sans-serif;line-height:1.45}
html{scroll-behavior:smooth}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin-inline:auto;padding:24px}
.grid{display:grid;gap:24px}
.hero{padding:48px 0;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0));border-bottom:1px solid var(--border)}
.hero .grid{grid-template-columns:1.1fr .9fr;align-items:center}
.eyebrow{font-size:.9rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
h1{font-size:clamp(1.9rem,2.6vw,3rem);margin:.25rem 0 8px}
.sub{color:#cfd7e3;font-size:1.075rem;max-width:46ch}
.materials{display:inline-block;margin-top:12px;background:var(--lt-green);color:#114225;padding:6px 10px;border-radius:999px;font-weight:600;font-size:.92rem}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{--_bg:transparent;--_bd:var(--red);--_fg:var(--white);display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 18px;border:2px solid var(--_bd);border-radius:999px;background:var(--_bg);color:var(--_fg);font-weight:700;letter-spacing:.03em;text-transform:uppercase;transition:all .2s ease; font-size:.9rem}
.btn-primary{--_bg:var(--red);--_bd:var(--red);--_fg:#fff}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn-outline{--_bg:transparent;--_bd:var(--red);--_fg:var(--white)}
.btn-outline:hover{background:rgba(207,46,46,.1)}
.btn-ghost{--_bg:transparent;--_bd:var(--border);--_fg:#dde7f5;border-color:var(--border)}
.btn-ghost:hover{background:rgba(255,255,255,.04)}
.hero-card{background:#151b23;border:1px solid var(--border);border-radius:14px;padding:18px}
.keybar{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.key{background:#121821;border:1px solid var(--border);border-radius:12px;padding:12px;font-size:.95rem}
.key b{display:block;color:#f5f8ff;margin-bottom:2px}
.section{padding:48px 0;border-bottom:1px solid var(--border)}
.h2{font-size:clamp(1.4rem,2vw,2rem);margin:0 0 10px}
.lead{color:#cfd7e3;max-width:62ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:18px}
.card{background:#151b23;border:1px solid var(--border);border-radius:14px;overflow:hidden}
.card .body{padding:14px}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;font-size:.78rem;font-weight:700}
.badge-blue{background:#eaf4ff;color:#0d3764}
.badge-red{background:#ffe8e8;color:#6b1515}
.list{display:grid;gap:10px;margin:12px 0 0;padding:0;list-style:none}
.list li{display:flex;gap:10px;align-items:flex-start}
.list li::before{content:"✓";color:#58d38b;font-weight:800;margin-top:2px}
.specs{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:16px}
.specs .col{background:#151b23;border:1px solid var(--border);border-radius:14px;padding:16px}
.specs dl{display:grid;grid-template-columns:1fr 1fr;gap:8px 14px;margin:0}
.specs dt{color:#aeb7c4}
.specs dd{margin:0;font-weight:600}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.video{border-radius:12px;overflow:hidden;border:1px solid var(--border);background:#0f141b}
.video a{display:block}
.video .cap{padding:10px;font-size:.9rem;color:#cfd7e3}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px}
.form{background:#151b23;border:1px solid var(--border);border-radius:14px;padding:18px}
.form label{display:block;font-weight:700;margin:.25rem 0 .35rem;color:#dfe7f3}
.form input,.form textarea{width:100%;background:#0f141b;color:#e9eef5;border:1px solid var(--border);border-radius:10px;padding:12px}
.form input:focus,.form textarea:focus{outline:2px solid #4aa3ff;border-color:transparent}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
footer{padding:28px 0;color:#93a3b8}
@media (max-width: 1024px){
  .hero .grid{grid-template-columns:1fr}
  .keybar{grid-template-columns:1fr 1fr}
  .cards{grid-template-columns:1fr 1fr}
  .video-grid{grid-template-columns:1fr 1fr}
  .gallery{grid-template-columns:1fr 1fr}
  .specs{grid-template-columns:1fr}
  .form .row{grid-template-columns:1fr}
}