:root{
  --bg:#FFFFFF; --fg:#12151C; --dim:#5B6472; --line:#E4E8EE;
  --card:#F7F9FB; --accent:#FF5C2B;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#06070A; --fg:#EDF1F6; --dim:#8B95A5; --line:#1C222C;
         --card:#0E1219; --accent:#FF6E42; }
}
*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:44rem;margin:0 auto;padding:4rem 1.5rem 6rem}
header{display:flex;align-items:center;gap:.85rem;margin-bottom:3rem}
.appicon{
  border-radius:22.5%;         /* the mask iOS applies to the real icon */
  display:block; flex:none;
  box-shadow:0 1px 3px rgba(0,0,0,.16);
}
.brand{font-weight:700;letter-spacing:.14em;font-size:.82rem;text-transform:uppercase}
h1{font-size:2.1rem;line-height:1.15;letter-spacing:-.02em;margin:0 0 .4rem}
.tagline{color:var(--dim);margin:0 0 2.5rem;font-size:1.05rem}
h2{font-size:1.15rem;margin:2.6rem 0 .6rem;letter-spacing:-.01em}
h3{font-size:1rem;margin:2rem 0 .4rem;color:var(--dim);font-weight:600}
p,li{color:var(--fg)}
ul{padding-left:1.15rem}
li{margin:.35rem 0}
a{color:var(--accent)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;
      padding:1.1rem 1.3rem;margin:1.4rem 0}
.card p{margin:.3rem 0}
.muted{color:var(--dim);font-size:.95rem}
nav{margin-top:3.5rem;padding-top:1.5rem;border-top:1px solid var(--line)}
nav a{margin-right:1.5rem;font-size:.95rem}
footer{margin-top:3rem;color:var(--dim);font-size:.88rem}