:root{
  --bg1:#4f46e5; --bg2:#06b6d4; --card:#ffffff; --text:#172033;
  --muted:#64748b; --accent:#f97316;
}
*{box-sizing:border-box}
body{
  margin:0; font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text); background:linear-gradient(135deg,var(--bg1),var(--bg2));
  min-height:100vh;
}
.container{max-width:1100px;margin:auto;padding:28px 20px 60px}
header{text-align:center;color:white;padding:35px 10px 28px}
.logo{font-size:54px;margin-bottom:8px}
h1{font-size:clamp(32px,6vw,58px);margin:0 0 10px;font-weight:800}
.subtitle{font-size:18px;opacity:.92;margin:0 auto;max-width:700px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  display:block;text-decoration:none;color:inherit;background:rgba(255,255,255,.96);
  border-radius:22px;padding:24px;min-height:190px;
  box-shadow:0 15px 35px rgba(0,0,0,.16);transition:.22s;
}
.card:hover{transform:translateY(-7px);box-shadow:0 22px 45px rgba(0,0,0,.23)}
.icon{font-size:42px;margin-bottom:12px}
.card h2{margin:0 0 8px;font-size:22px}
.card p{margin:0;color:var(--muted);line-height:1.5}
.page{max-width:850px;margin:35px auto;background:white;border-radius:26px;padding:35px;
box-shadow:0 20px 50px rgba(0,0,0,.2)}
.back{display:inline-block;text-decoration:none;color:#4f46e5;font-weight:700;margin-bottom:25px}
.app-icon{font-size:64px}
.page h1{color:var(--text);font-size:42px}
.description{font-size:17px;line-height:1.7;color:#475569}
.download{
 display:inline-block;margin-top:20px;padding:15px 25px;border-radius:14px;
 background:linear-gradient(90deg,#f97316,#ef4444);color:white;text-decoration:none;
 font-weight:800;box-shadow:0 8px 20px rgba(239,68,68,.25)
}
.note{margin-top:25px;background:#f1f5f9;border-radius:14px;padding:15px;color:#475569}
footer{text-align:center;color:rgba(255,255,255,.85);padding:25px}
@media(max-width:800px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.grid{grid-template-columns:1fr}.page{margin:20px 10px;padding:25px}.page h1{font-size:34px}}