/* Visual language shared with Job Radar and Security IR: same tokens, topbar, pill tabs, cards, chips and phone dock. */
:root{--accent-fg:#fff;--bg:#f6f7f9;--card:#fff;--fg:#1b1f24;--text:#2e353d;--strong:#0b0f14;--muted:#69707a;--line:#e3e6ea;--accent:#2f6fde;--hi:#1f9d55;--mid:#c98a0b;--lo:#9aa1aa;--crit:#d03b3b;--code:#f0f2f5;--elev:0 1px 2px rgba(16,24,40,.05),0 4px 16px -6px rgba(16,24,40,.08);color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--accent-fg:#0f1115;--bg:#0f1115;--card:#171a20;--fg:#e6e8eb;--text:#c3c9d2;--strong:#fff;--muted:#8b929c;--line:#262b33;--accent:#6aa0ff;--hi:#3ccf7e;--mid:#e0a92e;--lo:#5c636d;--crit:#f06464;--code:#12151a;--elev:0 1px 2px rgba(0,0,0,.3),0 8px 24px -10px rgba(0,0,0,.5);color-scheme:dark}}
:root[data-theme=dark]{--accent-fg:#0f1115;--bg:#0f1115;--card:#171a20;--fg:#e6e8eb;--text:#c3c9d2;--strong:#fff;--muted:#8b929c;--line:#262b33;--accent:#6aa0ff;--hi:#3ccf7e;--mid:#e0a92e;--lo:#5c636d;--crit:#f06464;--code:#12151a;--elev:0 1px 2px rgba(0,0,0,.3),0 8px 24px -10px rgba(0,0,0,.5);color-scheme:dark}
*{box-sizing:border-box}[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;position:relative;isolation:isolate;-webkit-tap-highlight-color:transparent}
body::before{content:"";position:absolute;inset:0 0 auto;height:620px;z-index:-1;pointer-events:none;
  background:radial-gradient(1000px 420px at 8% -12%,color-mix(in oklch,var(--accent) 24%,transparent),transparent 70%),
    radial-gradient(760px 360px at 92% -8%,color-mix(in oklch,var(--accent) 14%,transparent),transparent 70%),
    radial-gradient(circle,color-mix(in oklch,var(--fg) 11%,transparent) 1px,transparent 1.6px) 0 0/22px 22px;
  -webkit-mask-image:linear-gradient(to bottom,black 30%,transparent);mask-image:linear-gradient(to bottom,black 30%,transparent)}
main{max-width:1400px;margin:0 auto;padding:20px 16px 48px;outline:none}
h1{font-size:24px;letter-spacing:-.015em;margin:4px 0 4px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
h2{font-size:15px;font-weight:650;margin:0 0 12px;display:flex;align-items:center;gap:8px;letter-spacing:-.005em}
h2 .i{color:var(--accent)}h2 .count{font-size:12px;font-weight:600;color:var(--muted)}
h3{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:0 0 8px}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
p a{text-decoration:underline;text-underline-offset:2px}
a,button,input,summary,label{touch-action:manipulation}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.i{width:16px;height:16px;flex:none;vertical-align:-3px}.i.lg{width:20px;height:20px}
.muted,.sub{color:var(--muted)}.sub{font-size:13px;margin:0 0 16px;max-width:860px}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* topbar + tabs */
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 78%,transparent);backdrop-filter:saturate(1.6) blur(12px);
  -webkit-backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--line)}
.topbar .inner{max-width:1400px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:8px;color:var(--fg);font-weight:700;font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.brand:hover{text-decoration:none}.brand .logo{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;color:var(--accent);
  background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 30%,transparent),color-mix(in srgb,var(--accent) 8%,transparent))}
.tabs{display:flex;gap:2px;padding:4px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:999px;overflow-x:auto;scrollbar-width:none;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.tabs a{display:flex;align-items:center;gap:6px;padding:7px 16px;border-radius:999px;color:var(--muted);font-weight:500;white-space:nowrap;transition:background .18s,color .18s,box-shadow .18s}
.tabs a:hover{text-decoration:none;color:var(--fg);background:color-mix(in srgb,var(--accent) 9%,transparent)}
.tabs a.on{color:var(--fg);font-weight:600;background:color-mix(in srgb,var(--accent) 16%,var(--card));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 45%,transparent)}
.dock{display:none}

/* building blocks */
.card,.kpi{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 1px 2px rgba(0,0,0,.04);transition:border-color .18s,transform .18s}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px;margin-bottom:12px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:14px}
.kpi{display:block;color:var(--fg);text-align:left;font:inherit;cursor:pointer}.kpi b{display:block;font-size:26px;font-variant-numeric:tabular-nums}.kpi span{color:var(--muted)}
.kpi:hover{text-decoration:none;border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.kpi[aria-pressed=true]{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 20%,transparent)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);
  color:var(--fg);font:600 13px/1 system-ui,-apple-system,sans-serif;white-space:nowrap;cursor:pointer;transition:all .18s;box-shadow:0 1px 2px rgba(0,0,0,.06)}
.btn:hover{text-decoration:none;border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,var(--card))}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;box-shadow:none}
.tag{font-size:11px;border:1px solid var(--line);border-radius:4px;padding:0 5px;color:var(--muted);white-space:nowrap}
.chip{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:999px;font-size:12px;background:var(--bg);border:1px solid var(--line);color:var(--muted);cursor:pointer;font-family:inherit;white-space:nowrap}
button.chip:hover{color:var(--fg);border-color:color-mix(in srgb,var(--accent) 50%,var(--line))}
.chip[aria-pressed=true]{color:var(--fg);border-color:var(--accent);font-weight:600;background:color-mix(in srgb,var(--accent) 14%,var(--card))}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.empty{color:var(--muted);padding:24px 4px;text-align:center}

/* filter bar */
.filters{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}
.searchbox{position:relative;max-width:560px}.searchbox .i{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted)}
.searchbox input{width:100%;padding:10px 12px 10px 36px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--fg);font:inherit;font-size:15px}
.searchbox input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
.searchbox kbd{position:absolute;right:10px;top:50%;transform:translateY(-50%);font:11px ui-monospace,monospace;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:1px 6px}
.frow{display:flex;flex-wrap:wrap;align-items:center;gap:6px}.frow .lbl{font-size:12px;color:var(--muted);margin-right:4px;min-width:70px}
.resultbar{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin:0 0 10px}

/* tables */
.tablewrap{overflow-x:auto;margin:12px 0;border:1px solid var(--line);border-radius:10px;background:var(--card)}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:8px;border-top:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:12px;border-top:0}th{background:var(--bg)}

/* site chrome */
.skip{position:absolute;left:-999px;top:8px;z-index:60;padding:8px 12px;border-radius:8px;background:var(--card);border:1px solid var(--accent)}.skip:focus{left:16px}
.crumbs{font-size:13px;margin-bottom:10px;display:flex;gap:6px;align-items:center;color:var(--muted);flex-wrap:wrap}.crumbs .i{width:14px;height:14px}
.foot{max-width:1400px;margin:0 auto;padding:20px 16px 32px;border-top:1px solid var(--line);font-size:13px;display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}
.empty{color:var(--muted);padding:48px 4px;text-align:center}.empty h1{justify-content:center;color:var(--fg)}
.btn .i{width:15px;height:15px}

/* home */
.hero{padding:28px 0 20px;max-width:860px}
.hero h1{font-size:clamp(26px,4.2vw,40px);line-height:1.12;letter-spacing:-.025em;margin:0 0 12px}
.hero .sub{font-size:15px;max-width:720px;margin-bottom:18px}
.howto{margin-bottom:14px}.howto ol{margin:6px 0 0;padding-left:20px}.howto li{margin:3px 0}
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px;align-items:start}
.group{scroll-margin-top:80px}.group header{display:flex;gap:12px;align-items:flex-start;margin-bottom:10px}
.group h2{margin:0 0 2px}.group header p{margin:0;color:var(--muted);font-size:13px}
.gi{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;flex:none;color:var(--accent);background:color-mix(in srgb,var(--accent) 13%,transparent)}
.group ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.group li a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 6px;border-bottom:1px solid var(--line);color:var(--fg);border-radius:6px}
.group li:last-child a{border-bottom:0}
.group li a:hover{text-decoration:none;background:color-mix(in srgb,var(--accent) 7%,transparent);color:var(--accent)}
.group li small{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}

/* search results */
.results{display:flex;flex-direction:column;gap:8px;margin:14px 0}
.result{display:block;color:var(--fg)}.result:hover{text-decoration:none;border-color:var(--accent)}
.result b{font-size:15px}.result .g{font-size:12px;color:var(--muted);margin-left:8px}
.result p{margin:4px 0 0;color:var(--muted);font-size:13px}
.result .hits{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.result .hits a{font-size:12px;padding:3px 10px;border-radius:999px;border:1px solid var(--line);background:var(--bg);color:var(--fg)}
.result .hits a:hover{border-color:var(--accent);text-decoration:none}
.result .hits a.qh::before{content:"Q ";color:var(--accent);font-weight:700}

/* document */
.doc{display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px;align-items:start}
.doc.notoc{grid-template-columns:minmax(0,1fr)}
.side{position:sticky;top:72px;max-height:calc(100vh - 90px);overflow:auto;scrollbar-width:thin}
.toc>summary{list-style:none;display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);cursor:pointer;padding:6px 0}
.toc>summary::-webkit-details-marker{display:none}
.toc nav{display:flex;flex-direction:column;border-left:1px solid var(--line);margin-top:4px}
.toc nav a{font-size:13px;color:var(--muted);padding:4px 10px;margin-left:-1px;border-left:2px solid transparent;line-height:1.35}
.toc nav a.d3{padding-left:22px;font-size:12.5px}
.toc nav a:hover{color:var(--fg);text-decoration:none}
.toc nav a.on{color:var(--accent);border-left-color:var(--accent);font-weight:600}
.prose{max-width:820px;min-width:0;font-size:15.5px;line-height:1.7}
.docmeta{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.docmeta>*{display:inline-flex;align-items:center;gap:5px}.docmeta .i{width:14px;height:14px}
.docmeta .tag{font-size:12px;padding:2px 8px;border-radius:999px}
.prose .doc-title{font-size:clamp(26px,3.6vw,34px);line-height:1.15;letter-spacing:-.022em;margin:6px 0 16px;display:block}
.prose h2,.prose h3,.prose h4{position:relative;scroll-margin-top:80px;display:block;color:var(--fg);text-transform:none;letter-spacing:-.01em}
.prose h2{font-size:23px;font-weight:700;margin:0 0 14px;padding:0;border:0;display:flex!important;align-items:center;gap:10px}
.prose h3{font-size:18px;font-weight:650;margin:30px 0 10px;padding-left:12px;border-left:3px solid var(--accent)}
.prose h4{font-size:15.5px;font-weight:650;margin:22px 0 6px}
.prose .anchor{position:absolute;left:-18px;color:var(--muted);opacity:0;font-weight:400;text-decoration:none}
.prose h2 .anchor{top:2px}.prose :is(h2,h3,h4):hover .anchor{opacity:1}
.prose p{margin:0 0 14px}.prose ul,.prose ol{margin:0 0 14px;padding-left:24px}.prose li{margin:4px 0}.prose li>p{margin:0 0 6px}
.prose a{text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--accent) 40%,transparent);text-underline-offset:2px}
.prose a:hover{text-decoration-color:var(--accent)}
.prose hr{border:0;border-top:1px solid var(--line);margin:28px 0}.prose hr:has(+h2){display:none}
.prose img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line);background:#fff}
.prose strong{font-weight:650}
.prose :not(pre)>code{font:.86em ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--code);border:1px solid var(--line);border-radius:5px;padding:1px 5px;overflow-wrap:anywhere}
.prose table{font-size:14px}.prose td,.prose th{padding:9px 10px}.prose td code{white-space:nowrap}
.deadlink{border-bottom:1px dotted var(--muted)}
.codeblock{position:relative;margin:12px 0 16px;border:1px solid var(--line);border-radius:10px;background:var(--code);overflow:hidden}
.codeblock pre{margin:0;padding:14px 16px;overflow-x:auto;font:12.5px/1.55 ui-monospace,SFMono-Regular,Menlo,monospace;tab-size:4}
.codeblock .lang{position:absolute;left:12px;top:0;font:600 10px ui-monospace,monospace;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);transform:translateY(-50%);background:var(--code);padding:0 4px;display:none}
.codeblock button.cp{position:absolute;right:8px;top:8px;opacity:0;transition:opacity .15s}
.codeblock:hover button.cp,.codeblock button.cp:focus-visible{opacity:1}
button.cp{background:var(--card);border:1px solid var(--line);border-radius:6px;color:var(--muted);font:inherit;font-size:11px;padding:2px 8px;cursor:pointer}
button.cp:hover{color:var(--fg);border-color:var(--accent)}
.mermaid{overflow-x:auto;text-align:center;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px}
.prose blockquote{margin:14px 0 18px;padding:12px 16px;border-left:3px solid var(--line);background:var(--card);border-radius:0 10px 10px 0;color:var(--fg)}
.prose blockquote>:last-child{margin-bottom:0}
.prose blockquote.answer{border:1px solid color-mix(in srgb,var(--hi) 40%,var(--line));border-left:3px solid var(--hi);background:color-mix(in srgb,var(--hi) 6%,var(--card))}
.prose blockquote.hook{border-left-color:var(--mid);background:color-mix(in srgb,var(--mid) 7%,var(--card))}
.prose blockquote.verified{display:inline-block;padding:3px 12px;border:1px solid var(--line);border-radius:999px;font-size:12.5px;color:var(--muted);background:var(--card)}
.prose blockquote.verified p{margin:0}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:40px}
.pager a{display:flex;flex-direction:column;gap:4px;color:var(--fg);text-decoration:none}.pager a:hover{border-color:var(--accent)}
.pager a.next{text-align:right;align-items:flex-end}.pager small{display:inline-flex;align-items:center;gap:4px;color:var(--muted);font-size:12px}
.pager .i{width:14px;height:14px}

/* practice */
.qas{display:flex;flex-direction:column;gap:8px}
details.qa{padding:0;overflow:hidden}
details.qa>summary{list-style:none;display:flex;align-items:flex-start;gap:12px;padding:14px 16px;cursor:pointer}
details.qa>summary::-webkit-details-marker{display:none}
details.qa>summary:hover{background:color-mix(in srgb,var(--accent) 5%,transparent)}
details.qa .qt{flex:1;font-weight:600;font-size:15px}
details.qa .qt::before{content:"Q";display:inline-grid;place-items:center;width:20px;height:20px;margin-right:8px;border-radius:6px;font-size:11px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent);vertical-align:1px}
details.qa .tag{margin-top:2px;max-width:40%;overflow:hidden;text-overflow:ellipsis}
details.qa[open]>summary{border-bottom:1px solid var(--line)}
.qa-body{padding:14px 16px;border-left:3px solid var(--hi);background:color-mix(in srgb,var(--hi) 5%,var(--card));font-size:15px;line-height:1.65}
.qa-body p{margin:0 0 10px}.qa-body>a{font-size:13px;display:inline-flex;align-items:center;gap:3px}.qa-body .i{width:14px;height:14px}
.qa-body code{overflow-wrap:anywhere;font:.86em ui-monospace,monospace;background:var(--code);border-radius:4px;padding:1px 4px}
details.qa.flash{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 20%,transparent)}
.docfilter{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-size:13px}

/* ── visual components ── */
.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;z-index:30;background:linear-gradient(90deg,var(--accent),var(--hi));transition:width .1s linear}
.prose{counter-reset:sec}
.sec{counter-increment:sec;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px 28px;margin:18px 0;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.sec>h2::before{content:counter(sec);display:inline-grid;place-items:center;min-width:30px;height:30px;padding:0 6px;border-radius:9px;font-size:13px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent);flex:none}
.sec>hr:last-child,.sec>hr:first-of-type:last-child{display:none}
.sec>:last-child{margin-bottom:0}
.sec blockquote,.sec .codeblock,.sec .tablewrap{background:var(--bg)}
.sec .codeblock pre{background:var(--code)}
.prose p.lead,.prose>p:first-of-type{font-size:16.5px}

/* ordered lists as numbered steps */
.prose ol{list-style:none;padding-left:0;counter-reset:step}
.prose ol>li{counter-increment:step;position:relative;padding-left:40px;margin:10px 0;min-height:26px}
.prose ol>li::before{content:counter(step);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 13%,transparent);border:1px solid color-mix(in srgb,var(--accent) 35%,transparent)}
.prose ul{list-style:none;padding-left:4px}
.prose ul>li{position:relative;padding-left:20px}
.prose ul>li::before{content:"";position:absolute;left:4px;top:.72em;width:6px;height:6px;border-radius:2px;background:color-mix(in srgb,var(--accent) 70%,transparent);transform:rotate(45deg)}

/* term cards */
.deflist{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin:12px 0 18px}
.def{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 14px;border-top:3px solid color-mix(in srgb,var(--accent) 60%,var(--line))}
.def b{display:block;font-size:14.5px;margin-bottom:4px;line-height:1.35}
.def p{margin:0;font-size:14px;line-height:1.55;color:var(--muted)}.def p::first-letter{text-transform:uppercase}
.def p code{color:var(--fg)}

/* callouts */
.prose blockquote{position:relative}
.clbl{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.clbl::before{font-size:14px;letter-spacing:0}
.prose blockquote.hook .clbl{color:var(--mid)}.prose blockquote.hook .clbl::before{content:"💡"}
.prose blockquote.callout{border:1px solid var(--line);border-left-width:4px}
.callout.tip{border-left-color:var(--hi)!important;background:color-mix(in srgb,var(--hi) 7%,var(--card))!important}.callout.tip .clbl{color:var(--hi)}.callout.tip .clbl::before{content:"✓"}
.callout.important{border-left-color:var(--accent)!important;background:color-mix(in srgb,var(--accent) 7%,var(--card))!important}.callout.important .clbl{color:var(--accent)}.callout.important .clbl::before{content:"★"}
.callout.warning{border-left-color:var(--mid)!important;background:color-mix(in srgb,var(--mid) 8%,var(--card))!important}.callout.warning .clbl{color:var(--mid)}.callout.warning .clbl::before{content:"⚠"}
.callout.caution{border-left-color:var(--crit)!important;background:color-mix(in srgb,var(--crit) 7%,var(--card))!important}.callout.caution .clbl{color:var(--crit)}.callout.caution .clbl::before{content:"⛔"}

/* ascii diagrams */
figure{margin:14px 0 18px}
figcaption{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:8px}
figure.diagram{border:1px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:12px;overflow:hidden;position:relative;
  background:radial-gradient(circle,color-mix(in srgb,var(--accent) 16%,transparent) 1px,transparent 1.4px) 0 0/16px 16px,color-mix(in srgb,var(--accent) 4%,var(--bg))}
figure.diagram::before{content:"Diagram";position:absolute;right:10px;top:8px;font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:color-mix(in srgb,var(--accent) 70%,var(--muted))}
figure.diagram pre{margin:0;padding:18px 18px 16px;overflow-x:auto;font:12.5px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--fg)}

/* flow (stage) diagrams */
figure.flow{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:16px 18px 6px}
.flow ol{counter-reset:fl;margin:0;padding:0}
.flow .fstep{counter-increment:fl;position:relative;padding:0 0 16px 46px;margin:0;min-height:0;--lc:var(--accent)}
.flow .fstep::before{content:counter(fl);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:10px;display:grid;place-items:center;font-size:13px;font-weight:800;color:var(--lc);background:color-mix(in srgb,var(--lc) 15%,var(--card));border:1px solid color-mix(in srgb,var(--lc) 45%,transparent)}
.flow .fstep:not(:last-child)::after{content:"";position:absolute;left:14.5px;top:34px;bottom:2px;width:2px;border-radius:2px;background:linear-gradient(var(--lc),color-mix(in srgb,var(--lc) 15%,transparent))}
.flow .fhead{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;min-height:30px}
.flow .fhead b{font-size:15px}
.flow .lane{font-size:10.5px;font-weight:800;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;border-radius:999px;color:var(--lc);background:color-mix(in srgb,var(--lc) 13%,transparent)}
.flow .ftime{margin-left:auto;font:600 12px ui-monospace,monospace;color:var(--muted);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:1px 7px}
.flow .fstep p{margin:4px 0 0;font-size:14.5px;color:var(--fg)}
.flow .fstep ul{margin:6px 0 0}.flow .fstep li{margin:2px 0;font-size:14px;color:var(--muted)}
.lane-browser{--lc:#2f6fde}.lane-os{--lc:#7c5cd6}.lane-dns{--lc:#0f9bb0}.lane-network{--lc:#5b7083}.lane-tls{--lc:#1f9d55}.lane-server{--lc:#c26a12}
.lane-render{--lc:#c93f8c}.lane-attack{--lc:#d03b3b}.lane-defend{--lc:#1f9d55}.lane-client{--lc:#2f6fde}.lane-ca{--lc:#b08a00}.lane-other{--lc:var(--muted)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .lane-browser{--lc:#6aa0ff}:root:not([data-theme=light]) .lane-os{--lc:#a68bff}:root:not([data-theme=light]) .lane-dns{--lc:#3cc8dc}:root:not([data-theme=light]) .lane-network{--lc:#93a4b5}:root:not([data-theme=light]) .lane-tls{--lc:#3ccf7e}:root:not([data-theme=light]) .lane-server{--lc:#f0a050}
  :root:not([data-theme=light]) .lane-render{--lc:#ff7ac0}:root:not([data-theme=light]) .lane-attack{--lc:#f06464}:root:not([data-theme=light]) .lane-defend{--lc:#3ccf7e}:root:not([data-theme=light]) .lane-client{--lc:#6aa0ff}:root:not([data-theme=light]) .lane-ca{--lc:#e6c34a}}
:root[data-theme=dark] .lane-browser{--lc:#6aa0ff}:root[data-theme=dark] .lane-os{--lc:#a68bff}:root[data-theme=dark] .lane-dns{--lc:#3cc8dc}:root[data-theme=dark] .lane-network{--lc:#93a4b5}:root[data-theme=dark] .lane-tls{--lc:#3ccf7e}:root[data-theme=dark] .lane-server{--lc:#f0a050}
  :root[data-theme=dark] .lane-render{--lc:#ff7ac0}:root[data-theme=dark] .lane-attack{--lc:#f06464}:root[data-theme=dark] .lane-defend{--lc:#3ccf7e}:root[data-theme=dark] .lane-client{--lc:#6aa0ff}:root[data-theme=dark] .lane-ca{--lc:#e6c34a}

/* field / byte layouts */
figure.fields{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.frow-boxes{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:12px}
.fbox{flex-basis:110px;min-width:96px;padding:10px 8px;border-radius:8px;text-align:center;border:1px solid color-mix(in srgb,var(--fc) 50%,transparent);background:color-mix(in srgb,var(--fc) 14%,var(--card))}
.fbox b{display:block;font-size:12.5px;line-height:1.25;overflow-wrap:anywhere}.fbox small{display:block;font:11px ui-monospace,monospace;color:var(--muted);margin-top:3px}
.f0{--fc:#2f6fde}.f1{--fc:#1f9d55}.f2{--fc:#c98a0b}.f3{--fc:#c93f8c}.f4{--fc:#0f9bb0}.f5{--fc:#7c5cd6}
.fields dl{margin:0;display:grid;gap:6px}.fields dl>div{display:grid;grid-template-columns:minmax(120px,190px) 1fr;gap:10px;font-size:13.5px}
.fields dt{font-weight:650;display:flex;align-items:center;gap:7px}.fields dt i{width:10px;height:10px;border-radius:3px;background:var(--fc);flex:none}
.fields dd{margin:0;color:var(--muted)}

/* mermaid */
.mermaid-wrap{margin:14px 0 18px;border:1px solid var(--line);border-radius:14px;background:var(--bg);padding:14px;overflow-x:auto}
.mermaid-wrap .mermaid{margin:0;border:0;background:transparent;padding:0;min-height:60px}
.mermaid:not([data-processed]){color:transparent;font-size:0}
.mermaid svg{display:block;margin:0 auto;height:auto}

/* tables */
.prose tbody tr:nth-child(even){background:color-mix(in srgb,var(--fg) 2.5%,transparent)}
.prose tbody tr:hover{background:color-mix(in srgb,var(--accent) 6%,transparent)}
.prose td:first-child{font-weight:600}
.prose th{text-transform:uppercase;font-size:11px;letter-spacing:.04em}

/* Q&A cards on doc pages */
.qa-card{border:1px solid var(--line);border-radius:14px;margin:12px 0;overflow:hidden;scroll-margin-top:80px;background:var(--card)}
.qa-card:target{border-color:var(--mid);box-shadow:0 0 0 3px color-mix(in srgb,var(--mid) 25%,transparent)}
.qa-q{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;font-weight:650;font-size:15.5px;line-height:1.45}
.qa-q>div{flex:1}.qa-q p{margin:0}
.qbadge{flex:none;display:grid;place-items:center;width:24px;height:24px;border-radius:7px;font-size:12px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent)}
.qa-a{padding:12px 16px 14px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--hi) 6%,var(--card));border-left:3px solid var(--hi);transition:filter .2s}
.qa-a p{margin:0 0 8px}.qa-a p:last-child{margin:0}
.albl{display:block;font-size:10.5px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--hi);margin-bottom:4px}
body.practice .qa-a:not(.shown){filter:blur(7px);cursor:pointer;user-select:none}
.btn.sm{padding:5px 10px;font-size:12px}

@media (max-width:1100px){
  .doc{grid-template-columns:minmax(0,1fr);gap:0}
  .side{position:static;max-height:none;overflow:visible;margin-bottom:6px}
  .toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:6px 14px}
  .toc nav{max-height:55vh;overflow:auto;margin-bottom:8px}
}

/* phone: tabs move to a bottom dock */
@media (max-width:720px){
  body{font-size:15px}
  main{padding:14px max(16px,env(safe-area-inset-right)) calc(96px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
  .topbar .inner{padding:calc(8px + env(safe-area-inset-top)) 16px 8px}.topbar .tabs{display:none}
  .dock{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;justify-content:space-around;
    padding:6px 8px calc(6px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--card) 82%,transparent);
    backdrop-filter:saturate(1.6) blur(16px);-webkit-backdrop-filter:saturate(1.6) blur(16px);border-top:1px solid var(--line)}
  .dock a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0 4px;border-radius:12px;color:var(--muted);font-size:10.5px;font-weight:600;min-height:48px;justify-content:center}
  .dock a .i{width:22px;height:22px}.dock a:hover{text-decoration:none}.dock a.on{color:var(--accent)}
  .frow .lbl{min-width:0;width:100%}
  .hero{padding:12px 0 14px}.groups{grid-template-columns:1fr}
  .prose{font-size:16px}.prose h2{font-size:20px}.prose .anchor{display:none}
  .sec{padding:16px 14px;border-radius:14px;margin:12px -4px}.deflist{grid-template-columns:1fr}
  .flow .ftime{margin-left:0}.fields dl>div{grid-template-columns:1fr;gap:0}figure.flow{padding:14px 12px 4px}
  .prose blockquote{padding:10px 12px}.codeblock pre{font-size:12px;padding:12px}.codeblock button.cp{opacity:1}
  .pager{grid-template-columns:1fr}.pager a.next{text-align:left;align-items:flex-start}
  details.qa>summary{flex-direction:column;gap:6px}details.qa .tag{max-width:100%}
  .searchbox kbd{display:none}.foot{padding-bottom:calc(90px + env(safe-area-inset-bottom))}
}
@media print{
  .topbar,.dock,.side,.foot,.pager,.anchor,button.cp{display:none!important}body{background:#fff;color:#000}body::before{display:none}
  .card{box-shadow:none}main{padding:0}.doc{display:block}
}

/* ════════════════════════════════════════════════════════════════
   Reading experience layer — overrides the base above
   ════════════════════════════════════════════════════════════════ */

/* group accents: one hue per topic area, reused on home cards and page headers */
.g-start{--gc:#2f6fde}.g-networking{--gc:#0e9fb5}.g-crypto{--gc:#7c5cd6}.g-web{--gc:#c93f8c}.g-cloud{--gc:#e07b12}.g-labs{--gc:#1f9d55}
.g-k8s{--gc:#3b63e0}.g-linux{--gc:#c98a0b}.g-windows{--gc:#1c8adb}.g-hardening{--gc:#138a7e}.g-detection{--gc:#16a36a}.g-ir{--gc:#d03b3b}
.g-malware{--gc:#a3369a}.g-supply{--gc:#d9622b}.g-compliance{--gc:#5f6b7a}.g-design{--gc:#5a55d6}.g-coding{--gc:#5f9e1a}.g-behavioral{--gc:#d4497a}

/* layout: centre the reading column on wide screens */
.doc{grid-template-columns:250px minmax(0,800px);justify-content:center;gap:40px}
.doc.notoc{grid-template-columns:minmax(0,800px)}
.prose{max-width:800px;color:var(--text);font-size:16px;line-height:1.75;letter-spacing:.002em}
.prose strong{color:var(--strong);font-weight:650}
.prose h2,.prose h3,.prose h4,.prose .doc-title{color:var(--strong)}
.prose a{color:var(--accent)}
.prose :not(pre)>code{color:color-mix(in srgb,var(--accent) 70%,var(--strong));background:color-mix(in srgb,var(--accent) 8%,var(--card));border-color:color-mix(in srgb,var(--accent) 18%,var(--line))}
.prose p{margin:0 0 16px}
.crumbs{max-width:1090px;margin:0 auto 12px}

/* page header */
.dochero{position:relative;overflow:hidden;margin:0 0 18px;padding:26px 28px 22px;border-radius:20px;border:1px solid color-mix(in srgb,var(--gc,var(--accent)) 30%,var(--line));
  background:radial-gradient(600px 220px at 100% 0%,color-mix(in srgb,var(--gc,var(--accent)) 22%,transparent),transparent 70%),
    radial-gradient(400px 200px at 0% 100%,color-mix(in srgb,var(--gc,var(--accent)) 10%,transparent),transparent 70%),var(--card);box-shadow:var(--elev)}
.dochero::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle,color-mix(in srgb,var(--fg) 9%,transparent) 1px,transparent 1.5px) 0 0/18px 18px;
  -webkit-mask-image:linear-gradient(225deg,black,transparent 55%);mask-image:linear-gradient(225deg,black,transparent 55%)}
.dh-top{display:flex;align-items:center;gap:8px;margin-bottom:10px;position:relative;z-index:1}
.dh-group{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.03em;padding:4px 10px;border-radius:999px;color:var(--gc,var(--accent));background:color-mix(in srgb,var(--gc,var(--accent)) 14%,transparent)}
.dh-group .i{width:14px;height:14px}
.dh-read{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;color:var(--hi);padding:4px 10px;border-radius:999px;background:color-mix(in srgb,var(--hi) 13%,transparent)}
.dh-read .i{width:14px;height:14px}
.dochero .doc-title{position:relative;z-index:1;font-size:clamp(28px,4vw,40px);line-height:1.1;letter-spacing:-.028em;margin:0 0 12px;font-weight:780}
.dochero .doc-title code{font-size:.8em;background:none;border:0;padding:0;color:var(--gc,var(--accent))}
.dh-desc{position:relative;z-index:1;font-size:17px;line-height:1.6;color:var(--text);margin:0 0 16px;max-width:680px}
.dh-stats{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--muted)}
.dh-stats span{display:inline-flex;align-items:center;gap:6px}.dh-stats b{color:var(--strong);font-weight:700}.dh-stats .i{width:15px;height:15px;color:var(--gc,var(--accent))}
.dh-acts{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.dh-acts .btn{font-size:12.5px;padding:7px 12px}
.dh-acts .btn[aria-pressed=true]{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.docmeta{display:none}

/* section map: the page's outline as tiles */
.secmap{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px;margin:0 0 26px;counter-reset:none}
.secmap a{display:flex;align-items:flex-start;gap:9px;padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--fg);font-size:13px;line-height:1.35;text-decoration:none;transition:border-color .15s,transform .15s,background .15s}
.secmap a:hover{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));transform:translateY(-1px);background:color-mix(in srgb,var(--accent) 4%,var(--card))}
.secmap i{font-style:normal;flex:none;display:grid;place-items:center;min-width:22px;height:22px;border-radius:7px;font-size:11px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.secmap span{flex:1;font-weight:600}.secmap small{flex:none;font-size:11px;color:var(--muted);margin-top:2px}

/* section cards */
.sec{border-radius:20px;padding:30px 34px;margin:22px 0;box-shadow:var(--elev);scroll-margin-top:70px}
.sec>h2{font-size:25px;letter-spacing:-.02em;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.sec>h2::before{min-width:34px;height:34px;border-radius:11px;font-size:14px;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 24%,transparent),color-mix(in srgb,var(--accent) 8%,transparent));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 30%,transparent)}
.sec>h2+p,.sec>h2+.lp{font-size:16.5px}
.prose h3{font-size:19px;margin:34px 0 12px;padding:0 0 0 14px;border-left:3px solid var(--accent);line-height:1.3}
.prose h4{font-size:16px;margin:24px 0 8px;color:var(--strong);display:flex!important;align-items:center;gap:8px}
.prose h4::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* labelled lead-ins: "What is it?" / "Why it matters" … */
.prose p.lp{position:relative;padding-left:0}
.plbl{display:inline-flex;align-items:center;gap:6px;margin:0 8px 0 0;padding:2px 9px;border-radius:7px;font-size:11.5px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;vertical-align:1px;
  color:var(--kc);background:color-mix(in srgb,var(--kc) 13%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--kc) 28%,transparent)}
.k-what{--kc:#2f6fde}.k-why{--kc:#c98a0b}.k-how{--kc:#7c5cd6}.k-sec{--kc:#d03b3b}.k-ex{--kc:#1f9d55}.k-other{--kc:#5b7083}
:root[data-theme=dark] .k-what{--kc:#6aa0ff}:root[data-theme=dark] .k-why{--kc:#e6b440}:root[data-theme=dark] .k-how{--kc:#a68bff}:root[data-theme=dark] .k-sec{--kc:#f27474}:root[data-theme=dark] .k-ex{--kc:#3ccf7e}:root[data-theme=dark] .k-other{--kc:#9aa9b8}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .k-what{--kc:#6aa0ff}:root:not([data-theme=light]) .k-why{--kc:#e6b440}:root:not([data-theme=light]) .k-how{--kc:#a68bff}:root:not([data-theme=light]) .k-sec{--kc:#f27474}:root:not([data-theme=light]) .k-ex{--kc:#3ccf7e}:root:not([data-theme=light]) .k-other{--kc:#9aa9b8}}
.verified .plbl{font-size:10.5px;padding:1px 7px}

/* callouts */
.prose blockquote{border-radius:14px;padding:14px 18px;margin:18px 0 22px}
.prose blockquote.hook{border:1px solid color-mix(in srgb,var(--mid) 30%,var(--line));border-left:4px solid var(--mid);background:linear-gradient(90deg,color-mix(in srgb,var(--mid) 10%,var(--card)),var(--card))}
.prose blockquote.callout.emoji{display:grid;grid-template-columns:auto 1fr;column-gap:14px;align-items:start;border:1px solid var(--line);border-left:4px solid var(--accent);background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,var(--card)),var(--card))}
.prose blockquote.callout.emoji>*:not(.ebadge){grid-column:2}
.ebadge{grid-row:1/span 9;display:grid;place-items:center;width:34px;height:34px;border-radius:10px;font-size:18px;background:color-mix(in srgb,var(--accent) 12%,transparent)}
.prose blockquote.verified{display:flex;align-items:center;gap:8px;flex-wrap:wrap;border-radius:12px;padding:8px 12px;background:var(--bg);border:1px dashed var(--line);font-size:13px}
.prose blockquote.verified p{margin:0}

/* system-design header */
.sdmeta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:0 0 18px}
.diff{font-size:12px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;padding:4px 12px;border-radius:999px}
.diff-easy{color:var(--hi);background:color-mix(in srgb,var(--hi) 14%,transparent)}.diff-medium{color:var(--mid);background:color-mix(in srgb,var(--mid) 16%,transparent)}.diff-hard{color:var(--crit);background:color-mix(in srgb,var(--crit) 14%,transparent)}
.sdmeta .btn{text-decoration:none!important}

/* code: highlight.js tokens mapped to the site palette */
.codeblock{border-radius:12px;box-shadow:inset 0 1px 0 color-mix(in srgb,var(--fg) 4%,transparent)}
.codeblock .lang{display:block;position:static;transform:none;background:none;padding:8px 14px 0;font-size:10px;color:var(--muted)}
.codeblock pre{padding-top:8px}
.hljs-comment,.hljs-quote{color:var(--muted);font-style:italic}
.hljs-keyword,.hljs-selector-tag,.hljs-built_in,.hljs-doctag{color:#7c5cd6}
.hljs-string,.hljs-regexp,.hljs-addition,.hljs-attribute{color:#1f8a4c}
.hljs-number,.hljs-literal,.hljs-symbol,.hljs-bullet{color:#c2610c}
.hljs-title,.hljs-section,.hljs-function .hljs-title,.hljs-title.function_{color:#2f6fde}
.hljs-attr,.hljs-variable,.hljs-template-variable,.hljs-params,.hljs-name{color:#b0306e}
.hljs-type,.hljs-class .hljs-title,.hljs-meta{color:#0e8aa0}
.hljs-deletion{color:var(--crit)}
:root[data-theme=dark] .hljs-keyword,:root[data-theme=dark] .hljs-built_in,:root[data-theme=dark] .hljs-selector-tag{color:#b49cff}:root[data-theme=dark] .hljs-string,:root[data-theme=dark] .hljs-attribute{color:#7ad69a}:root[data-theme=dark] .hljs-number,:root[data-theme=dark] .hljs-literal{color:#f3a35c}:root[data-theme=dark] .hljs-title,:root[data-theme=dark] .hljs-title.function_{color:#7fb0ff}:root[data-theme=dark] .hljs-attr,:root[data-theme=dark] .hljs-variable,:root[data-theme=dark] .hljs-params,:root[data-theme=dark] .hljs-name{color:#ff8ec4}:root[data-theme=dark] .hljs-type,:root[data-theme=dark] .hljs-meta{color:#5fd4e6}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .hljs-keyword,:root:not([data-theme=light]) .hljs-built_in,:root:not([data-theme=light]) .hljs-selector-tag{color:#b49cff}:root:not([data-theme=light]) .hljs-string,:root:not([data-theme=light]) .hljs-attribute{color:#7ad69a}:root:not([data-theme=light]) .hljs-number,:root:not([data-theme=light]) .hljs-literal{color:#f3a35c}:root:not([data-theme=light]) .hljs-title,:root:not([data-theme=light]) .hljs-title.function_{color:#7fb0ff}:root:not([data-theme=light]) .hljs-attr,:root:not([data-theme=light]) .hljs-variable,:root:not([data-theme=light]) .hljs-params,:root:not([data-theme=light]) .hljs-name{color:#ff8ec4}:root:not([data-theme=light]) .hljs-type,:root:not([data-theme=light]) .hljs-meta{color:#5fd4e6}}

/* tables */
.tablewrap{border-radius:14px;box-shadow:var(--elev)}
.prose th{background:color-mix(in srgb,var(--accent) 6%,var(--bg));color:var(--fg)}
.prose td{color:var(--text)}.prose td:first-child{color:var(--strong)}

/* term cards: a touch more presence */
.def{border-radius:14px;background:var(--card);box-shadow:var(--elev);border-top-width:3px}
.sec .def{background:var(--bg)}
.def b{color:var(--strong)}

/* interview section */
.sec-qa{background:linear-gradient(180deg,color-mix(in srgb,var(--hi) 5%,var(--card)),var(--card) 240px)}
.sec-qa>h2::before{content:"?";color:var(--hi);background:color-mix(in srgb,var(--hi) 16%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--hi) 35%,transparent)}
.qa-card{box-shadow:var(--elev);border-radius:16px}
.qa-q{font-size:16px;padding:14px 16px}

/* flow + fields polish */
figure.flow,figure.fields,.mermaid-wrap,figure.diagram{border-radius:16px;box-shadow:var(--elev)}
.sec figure.flow,.sec figure.fields,.sec .mermaid-wrap{background:var(--bg)}

/* toc */
.toc>summary{justify-content:flex-start}.toc-pct{margin-left:auto;font:600 11px ui-monospace,monospace;color:var(--accent);letter-spacing:0}
.toc nav a.d2{font-weight:550;color:color-mix(in srgb,var(--fg) 80%,var(--muted))}

/* back to top + theme button */
.totop{position:fixed;right:20px;bottom:24px;z-index:35;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--fg);display:grid;place-items:center;cursor:pointer;box-shadow:var(--elev)}
.totop .i{transform:rotate(-90deg)}.totop:hover{border-color:var(--accent);color:var(--accent)}
.themebtn{flex:none;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--muted);display:grid;place-items:center;cursor:pointer}
.themebtn:hover{color:var(--fg);border-color:var(--accent)}

/* ── home ── */
.hero{max-width:900px;padding:36px 0 22px}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin:0 0 12px;padding:4px 10px;border-radius:999px;background:color-mix(in srgb,var(--accent) 12%,transparent)}
.eyebrow .i{width:14px;height:14px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.05;letter-spacing:-.035em;font-weight:800;margin-bottom:16px}
.grad{background:linear-gradient(90deg,var(--accent),#a66bff 55%,#e0559a);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:16.5px;line-height:1.6;color:var(--text);max-width:700px}
.hero .searchbox{max-width:640px}.hero .searchbox input{padding:14px 14px 14px 42px;font-size:16px;border-radius:14px;box-shadow:var(--elev)}
.hero .searchbox .i{left:15px}
.hero-stats{display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:20px}
.hero-stats a{display:flex;align-items:baseline;gap:7px;color:var(--muted);font-size:13.5px;text-decoration:none}
.hero-stats b{font-size:24px;color:var(--strong);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.hero-stats a:hover b{color:var(--accent)}
.kpis{display:none}
.continue{margin:6px 0 14px}.continue a{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--fg);border-left:4px solid var(--accent)}
.continue small{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}.continue b{flex:1}.continue span{color:var(--accent);font-size:18px}
.featured{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin:8px 0 14px}
.feat{position:relative;display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:18px;color:var(--fg);text-decoration:none!important;overflow:hidden;box-shadow:var(--elev);
  background:radial-gradient(400px 160px at 100% 0,color-mix(in srgb,var(--accent) 16%,transparent),transparent 70%),var(--card)}
.feat:hover{border-color:var(--accent);transform:translateY(-2px)}
.feat .fi{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent);margin-bottom:6px}
.feat small{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.feat b{font-size:18px;line-height:1.25;letter-spacing:-.01em}
.feat p{margin:0;font-size:13.5px;line-height:1.55;color:var(--muted);flex:1}
.feat .go{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:700;color:var(--accent);margin-top:6px}
.feat .go .i{width:14px;height:14px;transition:transform .15s}.feat:hover .go .i{transform:translateX(3px)}
.howto{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin:0 0 18px;background:none;border:0;padding:0;box-shadow:none}
.step{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:14px;border:1px dashed var(--line)}
.step i{font-style:normal;flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;font-weight:800;font-size:13px;color:var(--accent-fg);background:var(--accent)}
.step b{display:block;margin-bottom:2px}.step p{margin:0;font-size:13px;color:var(--muted)}
.progress-all{display:flex;align-items:center;gap:14px;margin:0 0 14px;padding:10px 14px;border-radius:12px;background:var(--card);border:1px solid var(--line);font-size:13px;color:var(--muted)}
.progress-all b{color:var(--strong)}.pbar{flex:1;height:8px;border-radius:99px;background:var(--line);overflow:hidden}.pbar i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--hi),var(--accent))}
.groups{gap:14px}
.group{padding:18px;border-radius:18px;box-shadow:var(--elev);border-top:3px solid var(--gc,var(--accent))}
.group header{align-items:center;margin-bottom:12px}
.group h2{font-size:16px}.group header>div{flex:1}
.gi{color:var(--gc,var(--accent));background:color-mix(in srgb,var(--gc,var(--accent)) 14%,transparent)}
.gcount{flex:none;font:700 12px ui-monospace,monospace;color:var(--muted);padding:3px 9px;border-radius:999px;background:var(--bg);border:1px solid var(--line)}
.gcount.some{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.gcount.all{color:var(--hi);border-color:color-mix(in srgb,var(--hi) 45%,var(--line))}
.group li a{gap:10px;justify-content:flex-start}.group li a .t{flex:1}
.ck{flex:none;width:16px;height:16px;border-radius:50%;border:1.5px solid color-mix(in srgb,var(--muted) 50%,transparent)}
.is-read .ck{border-color:var(--hi);background:var(--hi) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12 4 4 8-8'/%3E%3C/svg%3E") center/11px no-repeat}
.is-read .t{color:var(--muted)}

/* phones */
@media (max-width:720px){
  .dochero{padding:20px 18px 18px;border-radius:16px;margin:0 -4px 14px}
  .dh-desc{font-size:15.5px}
  .secmap{grid-template-columns:1fr 1fr;gap:6px}.secmap a{padding:8px 9px;font-size:12.5px}.secmap small{display:none}
  .sec{padding:18px 16px;border-radius:16px}
  .sec>h2{font-size:20px}
  .tablewrap.stack{border:0;box-shadow:none;background:none;overflow:visible}
  .tablewrap.stack table,.tablewrap.stack tbody,.tablewrap.stack tr,.tablewrap.stack td{display:block;width:100%}
  .tablewrap.stack thead{display:none}
  .tablewrap.stack tr{margin:0 0 10px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
  .tablewrap.stack tbody tr:nth-child(even){background:var(--card)}
  .tablewrap.stack td{border:0;padding:3px 0;white-space:normal}
  .tablewrap.stack td:first-child{font-size:15px;padding-bottom:6px;margin-bottom:4px;border-bottom:1px solid var(--line)}
  .tablewrap.stack td:not(:first-child)::before{content:attr(data-label);display:block;font-size:10.5px;font-weight:800;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
  .hero{padding:16px 0 10px}.hero-stats{gap:6px 18px}.hero-stats b{font-size:20px}
  .totop{bottom:calc(84px + env(safe-area-inset-bottom));right:14px}
  .themebtn{margin-left:auto}
}
@media print{.dochero{box-shadow:none;background:none}.secmap,.dh-acts,.totop,.themebtn{display:none!important}.sec{box-shadow:none;break-inside:auto}}

/* titled group cards ("- **Title**" + nested list) */
.groupcards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;margin:14px 0 20px}
.gcard{padding:14px 16px 10px;border-radius:14px;background:var(--card);border:1px solid var(--line);box-shadow:var(--elev);position:relative;overflow:hidden}
.sec .gcard{background:var(--bg)}
.gcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(var(--accent),color-mix(in srgb,var(--accent) 20%,transparent))}
.gcard>b{display:block;font-size:15px;color:var(--strong);margin-bottom:6px;line-height:1.35}
.gcard>b strong{font-weight:700}
.gcard ul{margin:0;padding-left:2px}.gcard li{font-size:14.5px;line-height:1.55;margin:5px 0}
.gcard ul ul li{font-size:14px;color:var(--muted)}
@media (max-width:720px){.groupcards{grid-template-columns:1fr}}
.gcard>p{margin:0 0 6px;font-size:14px;color:var(--muted);line-height:1.5}
.deflist.wide{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.deflist.numbered{counter-reset:dl}
.deflist.numbered .def{counter-increment:dl;position:relative;padding-left:48px}
.deflist.numbered .def::before{content:counter(dl);position:absolute;left:12px;top:12px;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--accent);background:color-mix(in srgb,var(--accent) 13%,transparent)}
.deflist.bare{grid-template-columns:1fr}
.deflist.bare .def{border-top-width:1px;border-left:3px solid var(--accent);padding:10px 14px}
.deflist.bare .def b{margin:0;font-weight:600;font-size:15px}
.gcard>p::first-letter{text-transform:uppercase}
.secmap a,.secmap span{min-width:0}.secmap span{overflow-wrap:anywhere}
@media (max-width:720px){.secmap{grid-template-columns:repeat(2,minmax(0,1fr))}.deflist,.deflist.wide,.groupcards{grid-template-columns:minmax(0,1fr)}}
@media (max-width:720px){
  .prose td code,.tablewrap.stack td code{white-space:normal;overflow-wrap:anywhere}
  .fields dl>div{grid-template-columns:minmax(0,1fr)}.fields dd,.fields dt{min-width:0;overflow-wrap:anywhere}
  .qa-q>div,.qa-a,.def,.gcard,.flow .fstep{min-width:0;overflow-wrap:anywhere}
  .sdmeta,.dh-acts{min-width:0}
}
@media (max-width:720px){.prose{overflow-wrap:anywhere}.sec,.prose>*{min-width:0;max-width:100%}}
/* must come after the wide-screen .doc grid above */
@media (max-width:1100px){.doc,.doc.notoc{grid-template-columns:minmax(0,1fr);gap:0}.crumbs{max-width:none}}