:root{
  --bg:#0a1730; --bg2:#0b2042; --surface:rgba(255,255,255,.035); --surface2:rgba(255,255,255,.05);
  --text:#e8edf7; --muted:rgba(232,237,247,.62); --heading:#f6f9ff;
  --accent:#00e5ff; --accent-ink:#04121f; --border:rgba(255,255,255,.10); --border2:rgba(0,229,255,.28);
}
html.theme-light{
  --bg:#eef2fb; --bg2:#e6ecf8; --surface:#ffffff; --surface2:#ffffff;
  --text:#26315c; --muted:rgba(15,29,92,.66); --heading:#0f1d5c;
  --accent:#3b5bdb; --accent-ink:#ffffff; --border:rgba(15,29,92,.12); --border2:rgba(59,91,219,.30);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:
  radial-gradient(900px 500px at 82% -8%, rgba(0,229,255,.10), transparent 60%),
  linear-gradient(170deg,var(--bg2),var(--bg));
  color:var(--text);font-family:'DM Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
html.theme-light body{background:linear-gradient(170deg,var(--bg2),var(--bg))}
.wrap{width:100%;max-width:760px;margin:0 auto;padding:0 22px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent);margin-right:9px;vertical-align:middle}

/* header */
.site-head{position:sticky;top:0;z-index:10;backdrop-filter:blur(10px);
  background:color-mix(in srgb,var(--bg) 78%, transparent);border-bottom:1px solid var(--border)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:60px;max-width:1080px}
.brand{font-family:'Syne',sans-serif;font-weight:800;font-size:18px;color:var(--heading)}
.brand:hover{text-decoration:none}
.head-nav{display:flex;align-items:center;gap:22px;font-family:'IBM Plex Mono',monospace;font-size:13px}
.head-nav a{color:var(--muted)}
.head-nav a:hover{color:var(--text);text-decoration:none}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);font-family:'IBM Plex Mono',monospace;
  font-weight:500;padding:11px 20px;border-radius:11px;font-size:14px;letter-spacing:.02em}
.btn:hover{text-decoration:none;filter:brightness(1.06)}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:9px}

/* article */
.article{padding:26px 22px 12px}
.crumbs{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);display:flex;gap:9px;flex-wrap:wrap;margin-bottom:26px}
.crumbs .here{color:var(--muted)}
.article h1{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(30px,5vw,44px);line-height:1.08;
  letter-spacing:-.02em;color:var(--heading);margin:.1em 0 .35em}
.meta{font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--muted);margin:0 0 22px}
.lede{font-size:20px;line-height:1.55;color:var(--text);margin:0 0 8px;font-weight:400}
.prose{font-size:17.5px}
.prose h2{font-family:'Syne',sans-serif;font-weight:700;font-size:26px;line-height:1.2;color:var(--heading);
  margin:1.9em 0 .5em;letter-spacing:-.01em}
.prose h3{font-family:'Syne',sans-serif;font-weight:600;font-size:19.5px;color:var(--heading);margin:1.6em 0 .4em}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em}
.prose li{margin:.4em 0}
.prose ul li.task{list-style:none;position:relative}
.prose ul li.task::before{content:"✓";position:absolute;left:-1.35em;color:var(--accent);font-weight:700}
.prose a{text-decoration:underline;text-underline-offset:2px}
.prose strong{color:var(--heading)}
.prose code{font-family:'IBM Plex Mono',monospace;font-size:.88em;background:var(--surface2);
  border:1px solid var(--border);border-radius:5px;padding:.1em .4em}
.prose pre{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:16px 18px;overflow:auto;margin:0 0 1.3em}
.prose pre code{background:none;border:0;padding:0}
.prose blockquote{margin:0 0 1.3em;padding:2px 20px;border-left:3px solid var(--accent);
  color:var(--muted);font-style:italic}
.prose blockquote p{margin:.5em 0}
.prose hr{border:0;border-top:1px solid var(--border);margin:2em 0}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15.5px}
.prose th,.prose td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:top}
.prose th{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500}
.prose tbody tr:last-child td{border-bottom:0}
.prose td:first-child{color:var(--heading);font-weight:500}

/* cta */
.cta{margin:44px 0 8px}
.cta-inner{background:var(--surface);border:1px solid var(--border2);border-radius:18px;padding:30px 28px;text-align:center}
.cta-inner h2{font-family:'Syne',sans-serif;font-weight:700;font-size:24px;color:var(--heading);margin:0 0 .3em}
.cta-inner p{color:var(--muted);margin:0 auto 20px;max-width:46ch}
.back{margin:26px 0 40px;font-family:'IBM Plex Mono',monospace;font-size:13px}

/* index */
.index{padding:44px 22px 12px;max-width:1000px}
.index-hero{max-width:720px;margin:0 auto 36px;text-align:center}
.index-hero h1{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(32px,5.5vw,48px);line-height:1.06;
  letter-spacing:-.02em;color:var(--heading);margin:.1em 0 .4em}
.index-hero .lede{font-size:19px;color:var(--muted);margin:0}
.cat-section{margin:0 0 40px}
.cat-title{font-family:'Syne',sans-serif;font-weight:700;font-size:22px;color:var(--heading);letter-spacing:-.01em;
  display:flex;align-items:baseline;gap:10px;margin:0 0 16px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.cat-count{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:400;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px 22px 20px;
  color:var(--text);transition:border-color .15s,transform .15s}
.card:hover{text-decoration:none;border-color:var(--border2);transform:translateY(-2px)}
.card h3{font-family:'Syne',sans-serif;font-weight:700;font-size:20px;line-height:1.22;color:var(--heading);margin:0 0 .45em}
.card-desc{color:var(--muted);font-size:15px;margin:0 0 16px}
.card-meta{font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--accent);margin:0}
.empty{color:var(--muted);text-align:center}

/* glossary */
.gloss-list{max-width:760px;margin:0 auto}
.gloss-item{padding:18px 0;border-bottom:1px solid var(--border)}
.gloss-item a{color:inherit}
.gloss-item h2{font-family:'Syne',sans-serif;font-weight:700;font-size:19px;color:var(--heading);margin:0 0 .25em}
.gloss-item a:hover h2{color:var(--accent)}
.gloss-item p{color:var(--muted);font-size:15px;margin:0}
.seealso{margin:26px 0 0;padding:16px 20px;background:var(--surface);border:1px solid var(--border);border-radius:14px}
.seealso p{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.seealso ul{margin:0;padding-left:1.1em}
.seealso li{margin:.35em 0}

/* footer */
.site-foot{margin-top:auto;border-top:1px solid var(--border);padding:30px 0}
.foot-inner{display:flex;flex-direction:column;gap:12px;align-items:center;text-align:center;max-width:1080px}
.foot-brand{font-family:'Syne',sans-serif;font-weight:800;color:var(--heading);margin:0}
.foot-nav{display:flex;gap:20px;font-family:'IBM Plex Mono',monospace;font-size:13px}
.foot-nav a{color:var(--muted)}
.foot-nav a:hover{color:var(--text);text-decoration:none}
.foot-copy{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--muted);margin:0}
@media(max-width:560px){.head-nav{gap:14px}.head-nav a:not(.btn){display:none}}

/* ── visual polish: icons, step chips, checklist cards, section markers ── */
.eyebrow{display:inline-flex;align-items:center}
.eyebrow-ico{display:inline-flex;margin-right:7px}
.eyebrow-ico svg{width:15px;height:15px}
.cat-ico{display:inline-flex;color:var(--accent);margin-right:4px}
.cat-ico svg{width:20px;height:20px}
.card-ico{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;margin-bottom:14px;
  background:color-mix(in srgb,var(--accent) 13%,transparent);border:1px solid var(--border2);color:var(--accent)}
.card-ico svg{width:22px;height:22px}
/* section markers on article headings */
.prose h2{position:relative;padding-left:16px}
.prose h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--accent);opacity:.85}
/* numbered how-to steps → chips */
.prose ol{list-style:none;counter-reset:step;padding-left:0}
.prose ol>li{counter-increment:step;position:relative;padding-left:46px;margin:.85em 0;min-height:30px}
.prose ol>li::before{content:counter(step);position:absolute;left:0;top:-1px;width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;border-radius:50%;
  background:color-mix(in srgb,var(--accent) 15%,transparent);border:1px solid var(--border2);
  color:var(--accent);font-family:'IBM Plex Mono',monospace;font-size:13px;font-weight:600}
/* all-checkbox lists → a bordered checklist card */
.prose ul.checklist{list-style:none;padding:16px 20px;margin:0 0 1.3em;background:var(--surface);border:1px solid var(--border);border-radius:14px}
.prose ul.checklist li{position:relative;padding-left:28px;margin:.55em 0}
.prose ul.checklist li.task::before{left:0}
/* per-category hero banner (full-width; --cat set inline per category) */
.guide-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);
  background:
    radial-gradient(700px 340px at 88% -34%, color-mix(in srgb, var(--cat) 30%, transparent), transparent 70%),
    linear-gradient(180deg, color-mix(in srgb, var(--cat) 11%, transparent), transparent 84%)}
.hero-wrap{position:relative;z-index:2;padding:30px 22px 34px}
.guide-hero .crumbs{margin-bottom:20px}
.guide-hero h1{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(30px,5vw,44px);line-height:1.08;
  letter-spacing:-.02em;color:var(--heading);margin:.1em 0 .35em}
.guide-hero .meta{margin:0}
.hero-watermark{position:absolute;right:-38px;top:50%;transform:translateY(-50%);z-index:1;color:var(--cat);
  opacity:.14;line-height:0;pointer-events:none}
.hero-watermark svg{width:280px;height:280px;stroke-width:1}
@media(max-width:680px){.hero-watermark{display:none}}

/* ── figures (SVG/HTML illustrations) ── */
.guide-fig{margin:1.7em 0}
.guide-fig>svg{width:100%;height:auto;display:block}
.guide-fig figcaption{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);text-align:center;margin-top:11px}
/* mock rundown table */
.mock-rundown{border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--surface)}
.mr-row{display:grid;grid-template-columns:1fr auto 60px;gap:14px;align-items:center;padding:11px 16px;border-top:1px solid var(--border);font-size:15px;color:var(--text)}
.mr-row:first-child{border-top:0}
.mr-head{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.mr-head span:last-child{text-align:right}
.mr-dur{font-family:'IBM Plex Mono',monospace;color:var(--heading);text-align:right}
.mr-tag{font-family:'IBM Plex Mono',monospace;font-size:11px;padding:2px 9px;border-radius:6px;border:1px solid var(--border2);color:var(--accent);justify-self:start}
.mr-tag.live{color:#34d399;border-color:rgba(52,211,153,.45)}
.mr-foot{display:grid;grid-template-columns:1fr 60px;gap:14px;padding:12px 16px;border-top:1px solid var(--border2);
  font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--heading);background:color-mix(in srgb,var(--accent) 7%,transparent)}
.mr-foot span:last-child{text-align:right}
/* mock browser-source dialog */
.mock-dialog{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--surface);max-width:440px;margin:0 auto;box-shadow:var(--shadow-card,0 8px 24px rgba(0,0,0,.25))}
.md-bar{display:flex;align-items:center;padding:9px 14px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--heading) 5%,transparent)}
.md-dot{width:10px;height:10px;border-radius:50%;background:var(--border2);margin-right:7px}
.md-title{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);margin-left:8px}
.md-body{padding:16px 18px}
.md-body label{display:block;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.md-field{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--heading);background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:9px 12px;margin-bottom:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.md-field.sm{margin-bottom:2px}
.md-row{display:flex;gap:12px}
.md-row>div{flex:1}
.md-check{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--accent);margin-top:4px}
/* mock OMUL editor (split: markup + live preview) */
.mock-omul{display:grid;grid-template-columns:1.2fr .8fr;gap:12px}
@media(max-width:640px){.mock-omul{grid-template-columns:1fr}}
.mo-pane{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--surface);min-width:0}
.mo-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 13px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--heading) 5%,transparent)}
.mo-tab{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.mo-valid{font-family:'IBM Plex Mono',monospace;font-size:11px;color:#34d399}
.mo-json{margin:0;padding:13px 15px;font-family:'IBM Plex Mono',monospace;font-size:12px;line-height:1.75;color:var(--text);white-space:pre;overflow-x:auto}
.mo-json .k{color:var(--accent)}
.mo-json .s{color:var(--heading);font-weight:500}
.mo-stage{padding:16px;display:flex;align-items:center;justify-content:center;
  background-image:linear-gradient(45deg,var(--border) 25%,transparent 25%),linear-gradient(-45deg,var(--border) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--border) 75%),linear-gradient(-45deg,transparent 75%,var(--border) 75%);
  background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0}
.mo-stage svg{width:100%;max-width:320px;height:auto;border-radius:6px}