:root{
  --bg:#14171c;--card:#1f232a;--card2:#262b33;--border:#353b45;
  --text:#e8eaed;--muted:#9aa1ab;--faint:#6b7280;
  --green:#5cc265;--amber:#e8a84a;--red:#d9534f;--blue:#3fa9f5;--lime:#8bd23a;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--blue)}
.wrap{max-width:900px;margin:0 auto;padding:0 16px}
.top{position:sticky;top:0;z-index:5;background:rgba(20,23,28,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700}
.brand img{border-radius:8px}
.langs{display:flex;flex-wrap:wrap;gap:4px}
.langs a{color:var(--muted);text-decoration:none;font-size:14px;padding:4px 10px;border-radius:999px;border:1px solid transparent}
.langs a:hover{color:var(--text);border-color:var(--border)}
.langs a[aria-current]{color:var(--bg);background:var(--green);font-weight:600}
figure{margin:20px 0}
figure img{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--border)}
.hero{padding:16px 0 8px}
.hero figure{margin-top:8px}
h1{font-size:clamp(26px,5vw,36px);line-height:1.2;margin:8px 0}
.lead{color:var(--muted);font-size:18px;margin:0 0 16px}
.play{display:inline-block;background:var(--green);color:var(--bg);font-weight:700;text-decoration:none;
  padding:12px 20px;border-radius:10px}
.play:hover{filter:brightness(1.08)}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 8px}
.toc a{background:var(--card);border:1px solid var(--border);color:var(--text);text-decoration:none;
  font-size:14px;padding:6px 12px;border-radius:8px}
.toc a:hover{border-color:var(--blue)}
section{padding:24px 0;border-top:1px solid var(--border);scroll-margin-top:72px}
h2{font-size:clamp(21px,3.6vw,26px);line-height:1.3;margin:0 0 12px}
h3{font-size:19px;margin:0 0 6px}
p{margin:0 0 14px}
ul,ol{padding-left:22px;margin:0 0 14px}
li{margin:4px 0}
code{font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--card2);
  padding:2px 6px;border-radius:6px;display:inline-block;margin:4px 0;max-width:100%;overflow-x:auto;white-space:nowrap;vertical-align:middle}
b{color:#fff}
ol.steps{list-style:none;padding:0;counter-reset:s}
ol.steps>li{counter-increment:s;position:relative;padding:12px 14px 12px 54px;margin:8px 0;
  background:var(--card);border:1px solid var(--border);border-radius:10px}
ol.steps>li::before{content:counter(s);position:absolute;left:14px;top:12px;width:28px;height:28px;border-radius:50%;
  background:var(--blue);color:var(--bg);font-weight:700;text-align:center;line-height:28px;font-size:15px}
ul.check{list-style:none;padding-left:0}
ul.check li{padding-left:28px;position:relative}
ul.check li::before{content:"✓";position:absolute;left:4px;color:var(--green);font-weight:700}
.callout{background:var(--card);border-left:4px solid var(--blue);padding:12px 14px;border-radius:0 10px 10px 0}
.callout.tip{border-left-color:var(--lime)}
.callout.warn{border-left-color:var(--amber)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--card2);border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:14px;color:var(--muted)}
ul.legend{list-style:none;padding:0;display:grid;gap:8px}
ul.legend li{display:flex;gap:12px;align-items:center;margin:0}
.sw{flex:0 0 34px;height:34px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  font-weight:800;color:var(--bg);font-size:18px}
.sw.ok{background:var(--green)}.sw.inc{background:var(--amber)}.sw.dec{background:var(--red)}
.sw.low{background:var(--amber);opacity:.42}.sw.none{background:var(--card2);color:var(--faint);border:1px solid var(--border)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}
.badge{display:inline-block;font-size:13px;color:var(--amber);border:1px solid var(--amber);border-radius:999px;padding:1px 10px;margin-bottom:10px}
details{background:var(--card);border:1px solid var(--border);border-radius:10px;margin:8px 0;padding:0 14px}
summary{cursor:pointer;font-weight:600;padding:12px 0;list-style-position:outside}
details p{color:var(--muted)}
.cta{text-align:center;padding:24px 0 8px}
footer{border-top:1px solid var(--border);margin-top:24px;padding:20px 0;color:var(--muted);font-size:14px}
footer p{margin:4px 0}
.muted{color:var(--faint)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.picker{text-align:center;padding-top:15vh}
.picker img{border-radius:20px}
.langs.big{justify-content:center;gap:10px;margin-top:20px}
.langs.big a{font-size:17px;border-color:var(--border);padding:10px 18px;color:var(--text)}
@media (max-width:520px){
  body{font-size:15.5px}
  ol.steps>li{padding-left:48px}
  ol.steps>li::before{left:12px}
}
@media print{.top,.toc,.play,.cta{display:none}body{background:#fff;color:#000}}