:root{
  --teal:#199B86; --teal-dark:#0F5A4B; --ember:#EE6A3A; --ink:#18211F;
  --muted:#56635E; --hint:#73807A; --card:#ffffff;
  --bg1:#E6F1ED; --bg2:#F3F1EA; --line:#E4EAE6;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6; font-size:17px;
  background:linear-gradient(180deg,var(--bg1),var(--bg2));
  min-height:100vh;
}
.wrap{max-width:720px; margin:0 auto; padding:32px 20px 64px}
header.site{display:flex; align-items:center; gap:12px; padding:8px 0 24px}
.logo{width:40px; height:40px; flex:0 0 auto}
.brand{font-weight:700; font-size:20px; letter-spacing:-.01em}
nav.top{margin-left:auto; display:flex; gap:18px; flex-wrap:wrap}
nav.top a{color:var(--muted); text-decoration:none; font-size:15px; font-weight:600}
nav.top a:hover{color:var(--teal)}
.card{background:var(--card); border:1px solid var(--line); border-radius:24px; padding:28px 26px; box-shadow:0 1px 2px rgba(0,0,0,.03)}
h1{font-size:30px; line-height:1.2; letter-spacing:-.02em; margin:.2em 0 .1em}
h2{font-size:20px; margin:1.6em 0 .4em; letter-spacing:-.01em}
.eyebrow{color:var(--teal); font-weight:800; letter-spacing:.12em; font-size:12px; text-transform:uppercase}
.lead{color:var(--muted); font-size:18px}
.meta{color:var(--hint); font-size:14px; margin-top:4px}
p,li{color:#26302C}
a{color:var(--teal)}
ul{padding-left:20px}
.tldr{background:#EAF5F1; border:1px solid #CFE7DF; border-radius:16px; padding:16px 18px; margin:18px 0}
.tldr strong{color:var(--teal-dark)}
.note{background:#FFF6EE; border:1px solid #F6DCC8; border-radius:16px; padding:14px 16px; font-size:15px; color:#5a4632}
.btns{display:flex; gap:12px; flex-wrap:wrap; margin-top:22px}
.btn{display:inline-block; text-decoration:none; font-weight:700; border-radius:999px; padding:13px 22px}
.btn-primary{background:var(--ink); color:#fff}
.btn-ghost{background:transparent; color:var(--ink); border:1.5px solid var(--ink)}
footer.site{margin-top:40px; padding-top:22px; border-top:1px solid var(--line); color:var(--hint); font-size:14px; display:flex; gap:16px; flex-wrap:wrap; align-items:center}
footer.site a{color:var(--muted); text-decoration:none; font-weight:600}
footer.site a:hover{color:var(--teal)}
.spacer{flex:1}
code.kbd{background:#eef3f1; padding:1px 6px; border-radius:6px; font-size:14px}
@media(max-width:560px){ h1{font-size:25px} body{font-size:16px} nav.top{gap:14px} }