:root{
  color-scheme:light dark;
  --bg:#f7f8fa; --fg:#171b22; --muted:#5b6470; --line:#dfe3ea;
  --card:#ffffff; --accent:#0b5c7a; --accent-fg:#ffffff;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0d1117; --fg:#e9edf3; --muted:#a3adba; --line:#2a313c;
         --card:#161c25; --accent:#7ccbe6; --accent-fg:#0b1a22; }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);overflow-wrap:break-word;
  font:17px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,Roboto,Helvetica,Arial,sans-serif;
}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;position:fixed;z-index:10;background:var(--accent);color:var(--accent-fg);padding:8px 12px;border-radius:8px}
.wrap{max-width:42rem;margin:0 auto;padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left))}
header{border-bottom:1px solid var(--line);background:var(--card);padding-top:env(safe-area-inset-top)}
.bar{display:flex;flex-wrap:wrap;gap:.6rem 1.25rem;align-items:baseline;padding:.9rem 0 .5rem}
.brand{font-weight:700;font-size:1.15rem;letter-spacing:-.01em;text-decoration:none;color:var(--fg)}
nav.main{display:flex;flex-wrap:wrap;gap:.9rem;margin-left:auto}
nav.main a{color:var(--muted);text-decoration:none;font-size:.94rem}
nav.main a:hover,nav.main a:focus{color:var(--fg);text-decoration:underline}
nav.main a[aria-current="page"]{color:var(--fg);font-weight:600}
.langs{display:flex;gap:.4rem;padding:0 0 .9rem;flex-wrap:wrap}
.langs a{font-size:.82rem;text-decoration:none;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.15rem .6rem}
.langs a:hover,.langs a:focus{color:var(--fg)}
.langs a[aria-current="true"]{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
main{padding:1.6rem 0 1rem}
h1{font-size:1.75rem;line-height:1.2;letter-spacing:-.015em;margin:.3em 0 .2em}
h2{font-size:1.2rem;line-height:1.3;margin:2em 0 .5em;padding-top:.8em;border-top:1px solid var(--line)}
h3{font-size:1.02rem;margin:1.4em 0 .3em}
p,ul,ol{margin:.6em 0}
ul,ol{padding-left:1.3em}
li{margin:.35em 0}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:2px}
.lede{font-size:1.06rem;color:var(--muted);margin:.2rem 0 1rem}
.meta{color:var(--muted);font-size:.92rem;margin-top:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px 18px;margin:1.2rem 0}
.card h2{border:0;margin-top:.6em;padding-top:0}
.toc{font-size:.95rem}
.mail{font-weight:600;word-break:break-all}
.tiles{display:grid;gap:.8rem;grid-template-columns:1fr;margin:1.5rem 0}
@media(min-width:34rem){.tiles{grid-template-columns:repeat(3,1fr)}}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1rem;text-decoration:none;color:var(--fg)}
.tile:hover,.tile:focus{border-color:var(--accent)}
.tile strong{display:block;margin-bottom:.2rem}
.tile span{color:var(--muted);font-size:.9rem}
i[lang]{font-style:normal;font-weight:600}
footer{border-top:1px solid var(--line);margin-top:2.5rem;padding:1.25rem 0 calc(2.5rem + env(safe-area-inset-bottom));color:var(--muted);font-size:.9rem}
footer a{color:var(--muted)}
footer p{margin:.35rem 0}