:root{
  --bg:#0b1020;
  --panel:#0f172a;
  --text:#e5e7eb;
  --muted:#94a3b8;
  --accent:#2563eb;
  --paper:#ffffff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Roboto,Cairo,sans-serif}
a{color:var(--text);text-decoration:none}
header{position:sticky;top:0;z-index:30;background:linear-gradient(180deg,#0b1020,rgba(11,16,32,0.8));backdrop-filter:saturate(140%) blur(6px);border-bottom:1px solid rgba(255,255,255,0.06)}
.wrap{max-width:1200px;margin:auto;padding:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:0.4px}
.nav{display:flex;gap:18px;align-items:center;justify-content:flex-end}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:white;border:none;padding:10px 14px;border-radius:12px;font-weight:600;cursor:pointer;box-shadow:0 8px 24px rgba(37,99,235,0.35);transition:transform .15s ease}
.btn:hover{transform:translateY(-1px)}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:center;padding:54px 18px 24px}
.hero h1{font-size:42px;line-height:1.15;margin:0 0 12px}
.hero p{color:var(--muted);font-size:16px;margin:0 0 18px}
.paper-stage{position:relative;min-height:520px;background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);border:1px solid rgba(255,255,255,0.06);border-radius:18px;overflow:hidden}
.paper{width:280px;height:396px;background:var(--paper);border-radius:8px;box-shadow:0 14px 68px rgba(0,0,0,0.35);position:sticky;top:80px;margin:40px auto;transform:rotate(-2deg);display:flex;align-items:center;justify-content:center;color:#111;font-weight:700}
.section{padding:60px 18px;border-top:1px solid rgba(255,255,255,0.06)}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid rgba(255,255,255,0.06);border-radius:16px;padding:18px}
footer{color:var(--muted);padding:28px 18px;border-top:1px solid rgba(255,255,255,0.06)}
@media (max-width:920px){.hero{grid-template-columns:1fr} .paper{top:60px}}