:root{
  --bg:#f5f7fb; --card:#ffffff; --ink:#0f172a; --muted:#5b6478; --line:rgba(15,23,42,.09);
  --accent:#1f6bff; --accent-2:#5aa2ff; --soft:rgba(31,107,255,.08); --shadow:0 10px 30px rgba(20,40,90,.08);
  --radius:20px; --maxw:1040px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0b0f17; --card:#131a26; --ink:#eef2fb; --muted:#9aa5bb; --line:rgba(255,255,255,.09);
        --accent:#5b9cff; --accent-2:#8bbcff; --soft:rgba(91,156,255,.12); --shadow:0 10px 30px rgba(0,0,0,.45)}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background-image:radial-gradient(1000px 500px at 80% -10%,var(--soft),transparent 60%),radial-gradient(800px 400px at -10% 10%,var(--soft),transparent 60%);background-repeat:no-repeat}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:5;backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:20px;height:58px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:650;letter-spacing:-.01em}
.brand img{width:28px;height:28px;border-radius:7px}
.brand:hover{text-decoration:none}
nav.main{display:flex;gap:18px;margin-left:auto;align-items:center;font-size:15px}
nav.main a{color:var(--muted)}
nav.main a:hover{color:var(--ink);text-decoration:none}
.lang{border:1px solid var(--line);border-radius:999px;padding:3px 11px;font-size:13px;color:var(--muted)}
.hero{padding:64px 0 28px;text-align:center}
.hero .icon{width:120px;height:120px;border-radius:27px;box-shadow:var(--shadow);margin:0 auto 22px;display:block}
.hero h1{font-size:clamp(34px,6vw,56px);line-height:1.05;letter-spacing:-.03em;margin:0 0 6px;font-weight:750}
.hero .sub{font-size:clamp(17px,2.4vw,22px);color:var(--muted);max-width:640px;margin:14px auto 26px}
.btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:14px;font-weight:600;border:1px solid var(--line);background:var(--card);color:var(--ink)}
.btn:hover{text-decoration:none;box-shadow:var(--shadow)}
.btn.primary{background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#fff;border-color:transparent}
.btn[aria-disabled=true]{opacity:.85;cursor:default}
.shot{margin:38px auto 10px;max-width:640px}
.shot img{width:100%;height:auto;border-radius:22px;box-shadow:var(--shadow);border:1px solid var(--line);background:linear-gradient(180deg,#f7f9fe,#e9eefb);color-scheme:light}
section{padding:46px 0}
section h2{font-size:clamp(24px,3.4vw,34px);letter-spacing:-.02em;margin:0 0 8px;line-height:1.15}
section .lead{color:var(--muted);max-width:680px;margin:0 0 24px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px;font-size:17px;letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:15px}
.tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:var(--soft);border-radius:999px;padding:2px 9px;margin-bottom:10px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:760px){.two{grid-template-columns:1fr}nav.main .hide-sm{display:none}}
ul.clean{margin:8px 0 0;padding-left:20px;color:var(--muted)}
ul.clean li{margin:4px 0}
footer.site{border-top:1px solid var(--line);margin-top:30px;padding:26px 0 40px;color:var(--muted);font-size:14px}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer.site a{color:var(--muted)}
footer.site a:hover{color:var(--ink)}
.doc{padding:44px 0 20px;max-width:760px}
.doc h1{font-size:clamp(30px,5vw,44px);letter-spacing:-.03em;line-height:1.1;margin:0 0 6px}
.doc .meta{color:var(--muted);margin:0 0 28px}
.doc h2{font-size:22px;margin:32px 0 6px;letter-spacing:-.01em}
.doc p,.doc li{color:var(--ink)}
.doc ul{padding-left:22px}
.doc code,.doc pre{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}
.doc code{background:var(--soft);border-radius:6px;padding:1px 6px}
.doc pre{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;overflow:auto}
.doc pre code{background:none;padding:0}
details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 18px;margin:10px 0}
details summary{cursor:pointer;font-weight:600}
details[open] summary{margin-bottom:8px}
.note{background:var(--soft);border-radius:14px;padding:12px 16px;color:var(--ink);font-size:15px}
/* Contact e-mail placeholder until contact.js fills it in */
.email-pending{display:inline-block;min-width:9em;height:1em;vertical-align:-2px;color:transparent;background:var(--soft);border-radius:6px;animation:email-pulse 1.4s ease-in-out infinite}
@keyframes email-pulse{50%{opacity:.5}}
@media (prefers-reduced-motion:reduce){.email-pending{animation:none}}