:root{
  --bg:#0e1014;
  --panel:#141821;
  --panel-2:#1b2029;
  --text:#f4ecdf;
  --muted:#b8ab9a;
  --gold:#ffb347;
  --gold-2:#ffcc66;
  --red:#e02a3b;
  --red-2:#ff6a3d;
  --shadow:0 30px 80px rgba(0,0,0,.44);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(255,179,71,.16), transparent 24%),
    radial-gradient(circle at top right, rgba(255,106,61,.12), transparent 22%),
    linear-gradient(180deg,#141821 0%,#090a0f 100%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header,.site-footer,.section,.hero{position:relative;z-index:1}
.site-header{
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:1rem;
  align-items:center;
  padding:1rem clamp(1rem,3vw,2.4rem);
  position:sticky;
  top:0;
  backdrop-filter:blur(14px);
  background:rgba(14,16,20,.8);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.brand{display:flex;gap:.8rem;align-items:center}
.brand-logo{width:154px}
.brand-kicker,.eyebrow{color:var(--gold);text-transform:uppercase;letter-spacing:.16em;font-size:.73rem}
.brand-copy{display:flex;flex-direction:column;gap:.2rem}
.header-nav{display:flex;gap:.95rem;flex-wrap:wrap;justify-content:center}
.header-nav a{color:var(--muted)}
.header-cta,.btn{
  min-height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:.8rem 1.1rem;
  border-radius:999px;
  font-weight:700;
}
.header-cta,.btn-primary{background:linear-gradient(135deg,var(--red),var(--red-2))}
.btn-secondary{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1)}
main{padding:clamp(1rem,2vw,1.6rem)}
.hero,.section,.site-footer{
  max-width:1180px;
  margin:0 auto 1.15rem;
  border:1px solid rgba(255,255,255,.06);
  border-radius:28px;
  background:linear-gradient(180deg, rgba(20,24,33,.95), rgba(9,10,15,.96));
  box-shadow:var(--shadow);
}
.hero{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1.2rem;
  padding:clamp(1.2rem,3vw,2rem);
}
.hero h1,.section h2{margin:.35rem 0 0;font-size:clamp(2rem,4vw,4rem);line-height:.94;letter-spacing:-.03em}
.hero-text,.section p,.faq-grid p,.bullet-list{color:var(--muted);line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin:1.1rem 0 0}
.apk-stack{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:.85rem;
  align-items:end;
}
.apk-stack img{
  border-radius:24px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.03);
}
.apk-stack .center{transform:translateY(-12px) scale(1.03)}
.apk-badge,.file-card,.prep-card,.download-callout,.faq-grid details{
  border-radius:22px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.03);
  padding:1rem;
}
.apk-badge{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-top:1rem}
.apk-badge span{color:var(--gold-2)}
.section{padding:clamp(1.1rem,2.5vw,1.55rem)}
.section-head h2{font-size:clamp(1.45rem,2.8vw,2.4rem)}
.file-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.file-card.active{background:linear-gradient(135deg, rgba(255,179,71,.12), rgba(255,255,255,.03))}
.file-card span{display:inline-flex;color:var(--gold);font-size:.78rem;letter-spacing:.16em;text-transform:uppercase}
.file-card strong{display:block;margin:.4rem 0 .3rem}
.split-section{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-items:center}
.bullet-list{margin:0;padding-left:1.1rem}
.bullet-list li{margin:.6rem 0}
.prep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.prep-card{display:flex;align-items:center;justify-content:center;min-height:88px;text-align:center}
.download-callout{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.faq-grid summary{cursor:pointer;font-weight:700;list-style:none}
.faq-grid summary::-webkit-details-marker{display:none}
.faq-grid p{margin:.75rem 0 0}
.site-footer{
  display:flex;
  justify-content:space-between;
  gap:1rem;
  align-items:center;
  padding:1.15rem 1.3rem;
}
.footer-links{display:flex;gap:1rem;flex-wrap:wrap}
.footer-links a{color:var(--gold)}
@media (max-width: 980px){
  .site-header,.hero,.file-grid,.split-section,.prep-grid,.faq-grid,.site-footer,.download-callout{grid-template-columns:1fr;display:grid}
  .site-header{position:static}
  .header-nav{justify-content:flex-start}
  .apk-stack{grid-template-columns:1fr}
  .apk-stack .center{transform:none}
  .download-callout{align-items:flex-start}
}
@media (max-width: 640px){
  main{padding:.75rem}
  .brand-logo{width:130px}
  .hero h1{font-size:2rem}
  .hero-actions,.footer-links{gap:.65rem}
}