/* letsbuildabot.com — future-clean, restrained brutalist.
   Principles:
   · Structure comes from spacing and tonal panels, not hard rules.
   · Every divider is a gradient that fades out at its ends.
   · Colour is nearly absent. Accent is reserved for the single most
     important element on a screen — never for decoration or highlighting. */
:root{
  --bg:#08090b;
  --panel:#0d0f13;
  --panel2:#12151a;
  --ink:#f4f6f8;
  --muted:#98a1ae;
  --dim:#868c94;          /* WCAG AA on every surface: 5.2:1 worst case */
  --line:#20242c;
  --line2:#2c313a;
  --faint:#5d6570;         /* decorative only — never text */
  --accent:#7cf2a9;
  --accent2:#8fb7c9;
  --warn:#d8c48e;
  --bad:#e09a9a;
  --max:1180px;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,"JetBrains Mono",Menlo,Consolas,monospace;
  --sans:ui-sans-serif,-apple-system,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  /* faded rules — used via border-image so no divider ever ends abruptly */
  --rule:linear-gradient(90deg,transparent,#2c313a 18%,#2c313a 82%,transparent);
  --rule-soft:linear-gradient(90deg,transparent,#20242c 22%,#20242c 78%,transparent);
  --rule-lead:linear-gradient(90deg,#2c313a,transparent 88%);
  --rule-v:linear-gradient(180deg,transparent,#2c313a 15%,#2c313a 85%,transparent);
  /* surfaces & inks that used to be hardcoded — tokenised so the light theme
     can flip them in one place */
  --prose:#bfc7d3;         /* long-form body text */
  --prose2:#c8d2dd;        /* callout text */
  --code-bg:#050609;
  --code-ink:#bccdc3;
  --code-inline:rgba(255,255,255,.05);
  --hover:#171b21;         /* option rows on hover */
  --soon:#0a0c0f;          /* muted 'in progress' card */
  --shade:rgba(255,255,255,.09);
  --shade2:rgba(255,255,255,.03);
  --shadow:rgba(0,0,0,1);
  --sel:rgba(255,255,255,.16);
  --navbg:rgba(8,9,11,.92);
  --barbg:rgba(8,9,11,.94);
  font-family:var(--sans);
}
*{box-sizing:border-box}

/* ---------------- light theme ----------------
   Opt-in via the header toggle; the choice is stored and applied before first
   paint. Same structure, inverted tone — panels get lighter rather than darker,
   rules stay gradient fades, and every ink was re-checked for AA at its size.
   Code blocks deliberately stay dark in both themes: syntax reads better and it
   keeps the "this is a thing you run" signal. */
:root[data-theme="light"]{
  --bg:#ffffff;
  --panel:#f7f8fa;
  --panel2:#eef0f4;
  --ink:#0d1117;
  --muted:#4a5361;         /* 8.0:1 on white, 7.4:1 on panel2 */
  --dim:#5b6472;           /* 6.3:1 on white, 5.9:1 on panel2 */
  --prose:#2a323d;
  --prose2:#2a323d;
  --line:#e3e6eb;
  --line2:#c9cfd8;
  --faint:#9aa2ae;
  --accent:#0b6b40;        /* 6.1:1 on white — readable as text and as a button */
  --accent2:#1f627d;
  --warn:#7a5a09;
  --bad:#a52019;
  --code-inline:rgba(0,0,0,.06);
  --hover:#e9ecf1;
  --soon:#f0f2f5;
  --shade:rgba(0,0,0,.055);
  --shade2:rgba(0,0,0,.015);
  --shadow:rgba(15,20,30,.22);
  --sel:rgba(11,107,64,.16);
  --navbg:rgba(255,255,255,.93);
  --barbg:rgba(247,248,250,.95);
  --rule:linear-gradient(90deg,transparent,#c9cfd8 18%,#c9cfd8 82%,transparent);
  --rule-soft:linear-gradient(90deg,transparent,#e3e6eb 22%,#e3e6eb 78%,transparent);
  --rule-lead:linear-gradient(90deg,#c9cfd8,transparent 88%);
  --rule-v:linear-gradient(180deg,transparent,#c9cfd8 15%,#c9cfd8 85%,transparent);
  color-scheme:light;
}
:root{color-scheme:dark}
/* Track colours are pastels picked for a dark field; on white they fall to
   ~1.6:1. Each track carries a darkened twin and the theme picks one. */
[style*="--tcl"]{--tc-on:var(--tc)}
.cat .cat-go{--tc-on:var(--tc)}
:root[data-theme="light"] .cat .cat-go{--tc-on:var(--tcl)}
:root[data-theme="light"] [style*="--tcl"]{--tc-on:var(--tcl)}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.55;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

a{color:var(--ink);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
/* Links inside prose are only 1.57:1 against surrounding text, so colour alone
   cannot distinguish them (WCAG 1.4.1). Underline them always. */
.article a:not(.btn),.co-lesson a:not(.btn),.callout a:not(.btn),.side a:not(.btn),
footer p a,footer .bottom a,.hint a:not(.btn),.empty a:not(.btn),.notice a:not(.btn),
.mp-done a:not(.btn){
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
  text-decoration-color:var(--faint)}
.article a:hover,.co-lesson a:hover,.callout a:hover,.side a:hover{text-decoration-color:var(--ink)}

h1,h2,h3,h4{margin:0 0 .5em;line-height:1.05;letter-spacing:-.035em;font-weight:800}
h1{font-size:clamp(2.2rem,5vw,3.7rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem)}
h3{font-size:1.1rem;letter-spacing:-.02em;line-height:1.28}
h4{font-size:1rem;letter-spacing:-.01em}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.hint{font-family:var(--mono);font-size:.82rem;color:var(--dim);line-height:1.55}

.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:80px 0;border:0;border-top:1px solid transparent;border-image:var(--rule-soft) 1;
  border-image-width:1px 0 0}
.section.tight{padding:52px 0}
.section:first-of-type{border:0}

.eyebrow{display:block;font-family:var(--mono);font-size:.76rem;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--dim);margin-bottom:16px}

/* ---------------- nav ---------------- */
.nav{position:sticky;top:0;z-index:50;background:var(--navbg);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;border-image:var(--rule) 1;border-image-width:0 0 1px}
.nav .wrap{display:flex;align-items:center;gap:32px;height:70px}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink)}
.logo:hover{text-decoration:none;opacity:.75}
.logo .word{font-family:var(--mono);font-size:.84rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase}
.logo .mark{display:grid;place-items:center;font-size:1.65rem;line-height:1;flex:none}
.nav ul{list-style:none;display:flex;align-items:center;gap:28px;margin:0 0 0 auto;padding:0}
.nav ul a{font-family:var(--mono);font-size:.78rem;font-weight:400;letter-spacing:.11em;
  text-transform:uppercase;color:var(--muted)}
.nav ul a:hover:not(.btn){color:var(--ink);text-decoration:none}
.nav ul a.active:not(.btn){color:var(--ink);text-decoration:none}
.nav ul a.btn:hover,.nav ul a.btn.active{text-decoration:none}
.nav ul a.btn.primary,.nav ul a.btn.primary:hover,.nav ul a.btn.primary.active{color:var(--bg)}
/* theme toggle — sits immediately after the Start here CTA */
.theme-li{position:relative;padding-left:20px}
/* a vertical fade, not a rule, separates it from the CTA */
.theme-li:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:26px;background:var(--rule-v)}
.theme-btn{display:inline-flex;align-items:center;gap:7px;padding:6px 2px;cursor:pointer;
  background:none;color:var(--muted);border:0;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.13em;text-transform:uppercase;
  transition:color .15s}
.theme-btn:hover{color:var(--ink)}
.theme-btn .th-ic{font-size:.95rem;line-height:1}
@media(max-width:880px){
  .theme-li{padding-left:0}
  .theme-li:before{display:none}
  .theme-btn{width:100%;justify-content:center;padding:10px 0}
}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line2);color:var(--ink);
  padding:8px 12px;font-size:1rem;cursor:pointer}
@media(max-width:900px){
  .nav ul{display:none;position:absolute;top:70px;left:0;right:0;background:var(--bg);
    flex-direction:column;align-items:stretch;gap:0;padding:0 24px 20px;
    border-bottom:1px solid transparent;border-image:var(--rule) 1;border-image-width:0 0 1px}
  .nav ul.open{display:flex}
  .nav ul li{padding:14px 0;border-bottom:1px solid transparent;border-image:var(--rule-soft) 1;
    border-image-width:0 0 1px}
  .nav ul li:last-child{border:0;padding-top:18px}
  .menu-btn{display:block}
}

/* ---------------- buttons ---------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:14px 24px;
  border:1px solid var(--line2);background:transparent;color:var(--ink);border-radius:0;
  font-family:var(--mono);font-size:.78rem;font-weight:500;letter-spacing:.13em;text-transform:uppercase;
  cursor:pointer;white-space:nowrap;transition:border-color .18s,color .18s,background .18s,opacity .18s}
.btn:hover{text-decoration:none;border-color:var(--ink)}
/* the one necessary highlight on any screen */
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--bg);font-weight:600}
.btn.primary:hover{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.btn.secondary{border-color:var(--line2)}
.btn.secondary:hover{border-color:var(--muted)}
.btn.ghost{border-color:transparent;padding-left:0;padding-right:0;color:var(--muted)}
.btn.ghost:hover{color:var(--ink);border-color:transparent;text-decoration:underline;text-underline-offset:4px}
.btn.sm{padding:10px 16px;font-size:.74rem}
.btn.block{width:100%}

/* ---------------- hero ---------------- */
.hero{padding:96px 0 76px;position:relative}
.hero:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line2) 20%,var(--line2) 80%,transparent)}
.hero-grid{display:grid;grid-template-columns:1.22fr .78fr;gap:56px;align-items:start}
@media(max-width:960px){.hero-grid{grid-template-columns:1fr;gap:44px}}
.hero h1{margin-bottom:24px}
.hero p.lead{font-size:1.1rem;color:var(--muted);max-width:600px;margin-bottom:34px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:38px}
.hero .proof{display:flex;flex-wrap:wrap;gap:14px 26px;padding-top:22px;font-family:var(--mono);font-size:.71rem;
  letter-spacing:.09em;text-transform:uppercase;color:var(--dim);
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.hero .proof b{color:var(--ink);font-weight:500}

.brief-card{background:var(--panel);padding:0}
.brief-card .hd{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:15px 20px;
  font-family:var(--mono);font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}
.brief-card .row{display:grid;grid-template-columns:114px 1fr;gap:16px;padding:15px 20px;font-size:.9rem;
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}
.brief-card .row span:first-child{font-family:var(--mono);font-size:.75rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--dim);padding-top:3px}
.brief-card .match{padding:16px 20px;font-family:var(--mono);font-size:.74rem;line-height:1.65;color:var(--muted)}

/* ---------------- tags ---------------- */
.tag{display:inline-block;padding:4px 10px;margin:2px 4px 2px 0;border:1px solid var(--line2);
  font-family:var(--mono);font-size:.74rem;letter-spacing:.09em;text-transform:uppercase;color:var(--dim)}
.tag.ok,.tag.warn,.tag.info,.tag.hot{color:var(--muted);border-color:var(--line2)}
.badge{display:inline-block;padding:3px 9px;border:1px solid var(--line2);color:var(--dim);
  font-family:var(--mono);font-size:.72rem;letter-spacing:.11em;text-transform:uppercase;white-space:nowrap}
.badge.sample{color:var(--dim)}

/* ---------------- grids & cards ---------------- */
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:940px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.card{background:var(--panel);border:0;padding:28px;position:relative;
  transition:background .2s,transform .2s}
.card:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
.card.hover{cursor:pointer}
.card.hover:hover{background:var(--panel2);transform:translateY(-2px)}
.card.hover:hover:before{background:linear-gradient(90deg,var(--muted),transparent 92%)}
.card h3{margin-bottom:9px}
.card p:last-child{margin-bottom:0}
.card .num{font-family:var(--mono);font-size:1.8rem;font-weight:600;color:var(--ink);line-height:1;
  display:block;margin-bottom:12px;letter-spacing:-.02em}
.card.step .num{font-size:.68rem;font-weight:500;letter-spacing:.22em;color:var(--dim)}

.cat{display:flex;flex-direction:column;gap:8px;color:var(--ink)}
.cat:hover{text-decoration:none}
.cat .ic{font-size:1.45rem;line-height:1;opacity:.9}
.cat h3{font-size:1.02rem;margin:6px 0 0}
.cat small{color:var(--muted);font-size:.86rem;line-height:1.55}
.cat-go{color:var(--tc-on,var(--muted));margin-top:auto;padding-top:16px;font-family:var(--mono);font-size:.67rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--dim)}
.cat:hover .cat-go{color:var(--ink)}

/* ---------------- split ---------------- */
.sides{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:820px){.sides{grid-template-columns:1fr}}
.side{padding:36px;background:var(--panel);position:relative}
.side:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
.side ul{padding-left:18px;color:var(--muted);margin:0 0 24px}
.side li{margin:9px 0}

/* ---------------- project cards ---------------- */
.proj-card{display:flex;flex-direction:column;gap:13px;color:var(--ink)}
.proj-card:hover{text-decoration:none}
.proj-card.soon{background:var(--soon)}
.proj-card.soon .pc-out{color:var(--dim)}
.pc-top{display:flex;align-items:center;gap:11px;flex-wrap:wrap}
.pc-ic{font-size:.98rem;line-height:1;opacity:.85}
.pc-track{color:var(--tc-on,var(--muted));font-family:var(--mono);font-size:.74rem;font-weight:500;letter-spacing:.17em;
  text-transform:uppercase;color:var(--dim)!important}
.proj-card h3,.proj-card .pc-title{margin:0;font-size:1.2rem;font-weight:800;letter-spacing:-.02em;line-height:1.28}
.pc-out{margin:0;color:var(--muted);font-size:.92rem}
.pc-stack{display:flex;flex-wrap:wrap;gap:3px}
.pc-foot{display:flex;align-items:center;gap:11px;flex-wrap:wrap;margin-top:auto;padding-top:17px;
  font-family:var(--mono);font-size:.75rem;letter-spacing:.07em;text-transform:uppercase;color:var(--dim);
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.pc-go{margin-left:auto;color:var(--muted);white-space:nowrap}
.proj-card:hover .pc-go{color:var(--ink)}

.pick{color:var(--ink);display:flex;flex-direction:column}
.pick:hover{text-decoration:none}
.pick-ic{font-size:1.6rem;line-height:1;opacity:.9}
.pick h3{margin:16px 0 9px;font-size:1.18rem}
.pick p{color:var(--muted);font-size:.93rem}
.pick-go{margin:auto 0 0;padding-top:18px;color:var(--muted);font-family:var(--mono);font-size:.69rem;
  letter-spacing:.11em;text-transform:uppercase;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.pick:hover .pick-go{color:var(--ink)}

/* ---------------- paths ---------------- */
.path-card{display:flex;flex-direction:column;gap:11px;color:var(--ink)}
.path-card:hover{text-decoration:none}
.path-steps{display:flex;flex-direction:column;gap:9px;margin:10px 0}
.path-step{display:flex;gap:12px;align-items:baseline;font-size:.86rem;color:var(--muted)}
.path-step b{font-family:var(--mono);font-size:.67rem;color:var(--dim);flex:none;font-weight:500}
.path-full{padding:52px 0;border-top:1px solid transparent;border-image:var(--rule-soft) 1;
  border-image-width:1px 0 0}
.path-full:first-child{border:0;padding-top:0}
.path-meta{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:26px 0 0}
@media(max-width:700px){.path-meta{grid-template-columns:1fr}}
.path-meta div{display:flex;flex-direction:column;gap:7px;padding:20px 22px;background:var(--panel);position:relative}
.path-meta div:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
.path-meta b{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);font-weight:500}
.path-meta span{font-size:.92rem;color:var(--muted)}
.path-track{list-style:none;padding:0;margin:32px 0 0;position:relative}
.path-track:before{content:"";position:absolute;left:19px;top:14px;bottom:44px;width:1px;
  background:linear-gradient(180deg,var(--line2),var(--line2) 70%,transparent)}
.path-track li{display:flex;gap:24px;padding-bottom:32px;position:relative}
.path-track .num{flex:none;width:38px;height:38px;display:grid;place-items:center;border-radius:0;
  font-family:var(--mono);font-size:.8rem;font-weight:600;background:var(--bg);
  border:1px solid var(--line2);color:var(--dim);z-index:1;transition:.18s}
.path-track .body{flex:1;min-width:0;padding-top:7px}
.path-track h3{margin:0 0 7px;font-size:1.1rem}
.path-track .why{margin:0 0 6px;max-width:74ch;color:var(--muted);font-size:.94rem;line-height:1.6}

.mp-head{margin-bottom:38px}
.mp-outcome{margin:12px 0 0;padding-top:12px;max-width:64ch;color:var(--dim);font-size:.93rem;line-height:1.6;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.mp-done{margin:18px 0 0;max-width:70ch;padding:24px 26px;background:var(--panel)}
.mp-done h3{margin:0 0 8px;font-size:1.15rem}
.mp-done p{margin:0 0 12px;color:var(--muted)}
.mp-done ul{margin:0;padding-left:20px;color:var(--muted)}
.mp-done li{margin:7px 0}
.mp-done a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--faint)}
.mp-progress{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.ring{--pct:0;flex:none;width:82px;height:82px;display:grid;place-items:center;position:relative;
  background:var(--panel);overflow:hidden}
.ring:before{content:"";position:absolute;left:0;bottom:0;width:100%;height:calc(var(--pct)*1%);
  background:linear-gradient(180deg,var(--shade),var(--shade2))}
.ring b{position:relative;font-family:var(--mono);font-size:1.05rem;font-weight:600;color:var(--ink)}
.mp-head h2{margin:0 0 7px}
.mp-head p{margin:0}
.mp-track li.is-done .body h3 a{color:var(--dim);text-decoration:line-through}
.mp-track li.is-done .why{color:var(--dim)}
.tickable{cursor:pointer}
.tickable:hover{border-color:var(--muted);color:var(--ink)}
.mp-track li.is-done .num{border-color:var(--line2);color:var(--muted)}
.mp-track li.is-next .num{border-color:var(--accent);color:var(--accent)}
.next-flag{display:block;font-family:var(--mono);font-size:.63rem;font-weight:500;letter-spacing:.22em;
  text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.why-picked{margin:0 0 13px;max-width:74ch;color:var(--dim);font-size:.85rem;line-height:1.55}
.why-picked span{color:var(--faint);margin-right:6px}
.mp-foot{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:18px}
.pathway-empty{padding:60px 36px}
.pathway-empty h2{margin-bottom:12px;font-size:1.5rem}
.ps{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:32px;padding-top:24px;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.ps-pos{font-family:var(--mono);font-size:.71rem;letter-spacing:.11em;text-transform:uppercase;color:var(--muted)}
.ps-pos.dim{color:var(--dim)}

/* ---------------- filters ---------------- */
.filters{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.filters select,.filters input{background:var(--panel);border:1px solid var(--line);color:var(--ink);
  padding:14px 16px;font-family:var(--mono);font-size:.8rem;letter-spacing:.09em;text-transform:uppercase;
  flex:1;min-width:152px;border-radius:0;transition:border-color .18s}
.filters input{text-transform:none;letter-spacing:0;flex:2}
.filters select:focus,.filters input:focus{outline:none;border-color:var(--muted)}
.count{font-family:var(--mono);font-size:.77rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);padding:18px 0}
.empty{padding:60px 36px;text-align:center;color:var(--dim);background:var(--panel)}

/* ---------------- forms ---------------- */
form.brief{background:var(--panel);padding:36px;position:relative}
form.brief:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
fieldset{border:0;padding:0;margin:0 0 38px}
fieldset:last-of-type{margin-bottom:22px}
legend{font-family:var(--mono);font-size:.8rem;font-weight:500;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink);margin-bottom:9px;padding:0}
label{display:block;font-family:var(--mono);font-size:.76rem;font-weight:400;letter-spacing:.11em;
  text-transform:uppercase;color:var(--dim);margin:20px 0 8px}
label .opt{text-transform:none;letter-spacing:0}
input[type=text],input[type=email],input[type=url],input[type=number],select,textarea{
  width:100%;background:var(--bg);border:1px solid var(--line);color:var(--ink);padding:14px 15px;
  font-family:var(--sans);font-size:.95rem;border-radius:0;transition:border-color .18s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--muted)}
textarea{min-height:114px;resize:vertical}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:9px}
.chips label{margin:0;display:inline-flex;align-items:center;gap:9px;padding:11px 16px;cursor:pointer;
  border:1px solid var(--line);color:var(--muted);background:transparent;
  font-family:var(--mono);font-size:.71rem;letter-spacing:.06em;text-transform:none;transition:.18s}
.chips label:hover{border-color:var(--line2);color:var(--ink)}
.chips label:has(input:checked){border-color:var(--muted);color:var(--ink)}
.chips input{accent-color:var(--muted)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:640px){.two{grid-template-columns:1fr}}
.form-foot{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:12px}
.form-layout{display:grid;grid-template-columns:1fr 330px;gap:36px;align-items:start}
@media(max-width:960px){.form-layout{grid-template-columns:1fr}}
.sticky{position:sticky;top:96px}
@media(max-width:960px){.sticky{position:static}}
.checklist{list-style:none;padding:0;margin:0}
.checklist li{display:flex;gap:12px;padding:12px 0;font-size:.88rem;color:var(--muted);
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.checklist li:first-child{border:0;padding-top:0}
.checklist li:before{content:"—";color:var(--dim);font-family:var(--mono)}

details{padding:20px 0;border-top:1px solid transparent;border-image:var(--rule-soft) 1;border-image-width:1px 0 0}
summary{cursor:pointer;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:18px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";font-family:var(--mono);color:var(--dim)}
details[open] summary:after{content:"–"}
details p{margin:14px 0 0;color:var(--muted)}

/* ---------------- article ---------------- */
.article{max-width:var(--max)}
/* Measure, not pixels: 740px was running to 89 characters a line. Typographic
   guidance puts comfortable long-form at 60-75; 66ch lands mid-range at every
   type size. */
.article>*{max-width:66ch}
.article>.table-scroll,.article>pre,.article>figure{max-width:100%}
.article>.table-scroll{max-width:740px}
.article h2{margin-top:56px;font-size:1.65rem}
.article h2:first-child{margin-top:0}
.article p,.article li{color:var(--prose);font-size:1.07rem;line-height:1.72;overflow-wrap:break-word}
.table-scroll{overflow-x:auto;margin:26px 0;max-width:100%}
.table-scroll:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.table-scroll table{margin:0}
@media(max-width:760px){.table-scroll table{min-width:560px}}
.article table{width:100%;border-collapse:collapse;margin:26px 0;font-size:.92rem}
.article th,.article td{text-align:left;padding:14px 16px;vertical-align:top;
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}
.article th{font-family:var(--mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--dim);font-weight:500}
.callout{padding:22px 26px;margin:34px 0;background:var(--panel);color:var(--prose2);position:relative}
.callout:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--muted),transparent)}
.warn-line{padding:16px 0 16px 22px;margin:26px 0;color:var(--warn);position:relative}
.warn-line:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--warn),transparent)}

pre{background:var(--code-bg);padding:24px;overflow-x:auto;margin:22px 0;max-width:100%;position:relative}
pre:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
pre:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
pre code{font-family:var(--mono);font-size:.83rem;line-height:1.7;color:var(--code-ink);white-space:pre}
:not(pre)>code{font-family:var(--mono);font-size:.86em;color:var(--ink);background:var(--code-inline);
  padding:1px 6px;overflow-wrap:anywhere;word-break:break-word}

/* ---------------- banners ---------------- */
.cta-band{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;
  padding:42px;background:var(--panel);position:relative}
.cta-band:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--muted),transparent 85%)}
.cta-band h2,.cta-band h3{margin:0 0 7px}
.notice{padding:15px 0 15px 20px;font-family:var(--mono);font-size:.75rem;line-height:1.65;
  color:var(--muted);position:relative}
.notice:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--line2),transparent)}
.success,.sub-done{padding:28px 32px;background:var(--panel);color:var(--muted);position:relative}
.success:before,.sub-done:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--accent),transparent)}
.success b,.sub-done b{color:var(--ink)}

.page-head{padding:78px 0 34px}
.page-head p{font-size:1.06rem;line-height:1.62;color:var(--muted);max-width:64ch}

/* ---------------- footer ---------------- */
footer{padding:60px 0 36px;color:var(--dim);font-size:.9rem;
  border-top:1px solid transparent;border-image:var(--rule) 1;border-image-width:1px 0 0}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;margin-bottom:48px}
@media(max-width:820px){footer .cols{grid-template-columns:1fr 1fr}}
footer h2{color:var(--ink);margin:0 0 16px;font-family:var(--mono);font-size:.75rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:10px 0}
footer a{color:var(--muted)}
/* Click Shift credit — sits under the brand blurb, separated by a fading rule
   rather than a hard border. */
.cs-cred{margin:18px 0 0;padding-top:14px;font-family:var(--mono);font-size:.76rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--dim);max-width:320px;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.cs-cred a{color:var(--ink)}
footer .bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;padding-top:28px;
  font-family:var(--mono);font-size:.76rem;letter-spacing:.07em;text-transform:uppercase;
  border-top:1px solid transparent;border-image:var(--rule-soft) 1;border-image-width:1px 0 0}

/* ---------------- profile bar ---------------- */
/* One compact row at every width. The chip strip scrolls horizontally rather
   than wrapping, so the bar never grows taller than a single line. */
.profile-bar{position:sticky;top:70px;z-index:40;background:var(--barbg);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;border-image:var(--rule-soft) 1;border-image-width:0 0 1px}
.pb-inner{display:flex;align-items:center;gap:16px;flex-wrap:nowrap;padding-top:9px;padding-bottom:9px;
  position:relative}
.pb-chips{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;flex:1;min-width:0;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  -webkit-mask:linear-gradient(90deg,#000 calc(100% - 28px),transparent);
  mask:linear-gradient(90deg,#000 calc(100% - 28px),transparent)}
.pb-chips::-webkit-scrollbar{display:none}
.pb-label{flex:none;font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--dim);margin-right:4px}
.pb-chip{flex:none;display:inline-flex;align-items:center;gap:8px;padding:6px 11px;cursor:pointer;
  border-radius:0;white-space:nowrap;font-family:var(--mono);font-size:.68rem;letter-spacing:.04em;
  color:var(--muted);border:1px solid var(--line);background:transparent;transition:.18s}
.pb-chip:hover,.pb-chip[aria-expanded=true]{border-color:var(--muted);color:var(--ink)}
.pb-chip .caret{font-size:.62rem;color:var(--dim)}
.pb-right{display:flex;align-items:center;gap:14px;flex:none;flex-wrap:nowrap}
.pb-prog,.pb-edit{font-family:var(--mono);font-size:.65rem;letter-spacing:.13em;text-transform:uppercase;
  white-space:nowrap}
.pb-prog{color:var(--dim)}
.pb-edit{color:var(--muted)}
.pb-right .btn{padding:7px 13px;font-size:.65rem}
.pb-menu{position:absolute;top:calc(100% + 8px);z-index:60;width:308px;max-width:calc(100vw - 48px);
  padding:0;border:1px solid var(--line2);background:var(--panel);box-shadow:0 20px 50px -20px var(--shadow)}
.pb-opt{display:flex;gap:13px;width:100%;text-align:left;padding:13px 15px;cursor:pointer;
  background:none;border:0;color:var(--ink);font:inherit;font-size:.85rem;
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}
.pb-opt:last-child{border:0}
.pb-opt:hover{background:var(--panel2)}
.pb-opt.on{background:var(--panel2)}
.pb-opt.on b{color:var(--accent)}
.pb-opt .ic{font-size:1rem;flex:none;opacity:.85}
.pb-opt b{display:block;font-size:.85rem;font-weight:600}
.pb-opt small{display:block;color:var(--dim);font-size:.75rem;line-height:1.45;margin-top:3px}
@media(max-width:900px){
  .profile-bar{top:70px}
  .pb-label{display:none}
  .pb-inner{gap:12px}
  .pb-prog{display:none}
  .pb-edit{display:none}
}
@media(max-width:520px){.pb-right .btn{max-width:44vw;overflow:hidden;text-overflow:ellipsis;display:block;
  white-space:nowrap;line-height:1.6}}

#toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,12px);z-index:200;opacity:0;
  pointer-events:none;padding:14px 24px;background:var(--panel2);color:var(--ink);
  font-family:var(--mono);font-size:.7rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;
  box-shadow:0 20px 44px -18px var(--shadow);transition:opacity .2s,transform .2s}
#toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------------- wizard ---------------- */
.wiz-wrap{max-width:820px}
.wz{background:var(--panel);padding:44px;position:relative}
.wz:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--muted),transparent 88%)}
@media(max-width:640px){.wz{padding:28px 22px}}
.wz-top{display:flex;align-items:center;gap:20px;margin-bottom:28px}
.wz-bar{flex:1;height:1px;background:linear-gradient(90deg,var(--line2),var(--line2) 85%,transparent)}
.wz-bar i{display:block;height:1px;background:linear-gradient(90deg,var(--ink),var(--muted));
  transition:width .3s ease}
.wz-step{font-family:var(--mono);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--dim);white-space:nowrap}
.wz-crumbs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:30px}
.crumb-chip{display:inline-flex;align-items:center;gap:10px;padding:7px 12px;cursor:pointer;border-radius:0;
  font-family:var(--mono);font-size:.67rem;letter-spacing:.05em;color:var(--dim);
  border:1px solid var(--line);background:transparent;transition:.18s}
.crumb-chip:hover{border-color:var(--muted);color:var(--ink)}
.crumb-chip span{font-size:.68rem;color:var(--dim)}
.wz h2{font-size:clamp(1.5rem,3.4vw,2rem);margin-bottom:10px}
.wz-help{font-size:.94rem;margin-bottom:30px;color:var(--muted)}
.wz-opts{display:grid;gap:2px}
.wz-opt{display:flex;align-items:center;gap:18px;width:100%;text-align:left;cursor:pointer;border:0;
  padding:22px 24px;background:var(--panel2);color:var(--ink);font:inherit;border-radius:0;position:relative;
  transition:background .18s,padding-left .18s}
.wz-opt:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,transparent,var(--muted),transparent);opacity:0;transition:opacity .18s}
.wz-opt:hover{background:var(--hover);padding-left:28px}
.wz-opt:hover:before{opacity:1}
.wz-opt .k{flex:none;width:24px;height:24px;display:grid;place-items:center;border:1px solid var(--line2);
  font-family:var(--mono);font-size:.66rem;font-weight:600;color:var(--dim)}
.wz-opt:hover .k{border-color:var(--muted);color:var(--ink)}
.wz-opt .ic{font-size:1.3rem;flex:none;line-height:1;opacity:.9}
.wz-opt .t{flex:1;min-width:0}
.wz-opt .t b{display:block;font-size:1.02rem;letter-spacing:-.01em}
.wz-opt .t small{display:block;color:var(--muted);font-size:.86rem;line-height:1.5;margin-top:4px}
.wz-opt .go{flex:none;font-family:var(--mono);color:var(--dim)}
.wz-opt:hover .go{color:var(--ink)}
.wz-foot{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin-top:30px}
.wz-first{margin:28px 0;padding:28px;background:var(--panel2);position:relative}
.wz-first:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--accent),transparent)}
.wz-first h3{margin:0 0 9px;font-size:1.3rem}
.wz-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:12px}

/* ---------------- course ---------------- */
.co-layout{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}
@media(max-width:940px){.co-layout{grid-template-columns:1fr;gap:24px}}
.co-layout>*{min-width:0}
.co-nav{position:sticky;top:166px;min-width:0}
@media(max-width:940px){.co-nav{position:static}}
.co-navlabel{display:block;font-family:var(--mono);font-size:.63rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--dim);margin-bottom:16px}
.co-nav ol{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:0}
.co-navitem{display:flex;gap:14px;align-items:flex-start;width:100%;text-align:left;cursor:pointer;
  padding:14px 0;border:0;background:none;color:var(--muted);font:inherit;font-size:.86rem;
  transition:color .18s;min-width:0;
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}
.co-navitem:hover{color:var(--ink)}
.co-navitem.on{color:var(--ink)}
.co-navitem .n{flex:none;width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--line);
  font-family:var(--mono);font-size:.63rem;font-weight:600;color:var(--dim)}
.co-navitem.on .n{border-color:var(--muted);color:var(--ink)}
.co-navitem.done .n{border-color:var(--line2);color:var(--muted)}
.co-navitem span{min-width:0;overflow-wrap:anywhere}
.co-navitem small{display:block;font-family:var(--mono);font-size:.63rem;letter-spacing:.11em;
  text-transform:uppercase;color:var(--dim);margin-top:4px}
.co-main{min-width:0}
.co-lesson{padding:42px;background:var(--panel);position:relative}
.co-lesson:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
@media(max-width:640px){.co-lesson{padding:28px 22px}}
.co-crumb{font-family:var(--mono);font-size:.65rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--dim);margin-bottom:14px}
.co-lesson h2{margin-bottom:24px;font-size:clamp(1.6rem,3.4vw,2.1rem)}
.co-lesson h3.co-h{font-size:1.22rem;margin:38px 0 14px}
.co-lesson h4{font-size:.96rem;margin:28px 0 9px;color:var(--muted);font-family:var(--mono);
  font-weight:500;letter-spacing:.05em}
.co-lesson p{color:var(--prose);font-size:1.02rem}
.co-check{margin-top:44px;padding-top:34px;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.co-q{margin:26px 0 0}
.co-qt{font-weight:650;color:var(--ink);margin-bottom:14px}
.co-opts{display:grid;gap:2px}
.co-opt{text-align:left;cursor:pointer;padding:15px 18px;border:0;background:var(--panel2);
  color:var(--ink);font:inherit;font-size:.92rem;border-radius:0;position:relative;
  transition:background .18s,padding-left .18s}
.co-opt:hover:not(:disabled){background:var(--hover);padding-left:24px}
.co-opt:disabled{cursor:default}
.co-opt.right,.co-opt.wrong{background:var(--panel2)}
.co-opt.right:before,.co-opt.wrong:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px}
.co-opt.right{color:var(--ink)}
.co-opt.right:before{background:linear-gradient(180deg,var(--accent),transparent)}
.co-opt.wrong{color:var(--dim)}
.co-opt.wrong:before{background:linear-gradient(180deg,var(--bad),transparent)}
.co-why{margin:14px 0 0;padding:14px 0 14px 20px;font-size:.89rem;color:var(--muted);position:relative}
.co-why:before{content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--warn),transparent)}
.co-why.ok:before{background:linear-gradient(180deg,var(--accent),transparent)}
.co-foot{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin-top:38px;
  padding-top:26px;border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}

/* certificate */
.cert-locked{padding:48px;text-align:center;color:var(--dim);margin:26px 0;background:var(--panel);
  font-family:var(--mono);font-size:.78rem;letter-spacing:.16em;text-transform:uppercase}
.cert-form{margin:30px 0}
.cert-wrap{overflow-x:auto;margin:34px 0}
.cert-wrap>.cert{min-width:min(660px,100%);aspect-ratio:1.414/1;background:var(--panel);padding:0;position:relative}
.cert-wrap>.cert:before{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(160deg,rgba(124,242,169,.5),rgba(255,255,255,.14) 35%,transparent 70%);
  -webkit-mask:linear-gradient(#000,#000) content-box,linear-gradient(#000,#000);
  -webkit-mask-composite:xor;mask:linear-gradient(#000,#000) content-box,linear-gradient(#000,#000);
  mask-composite:exclude;padding:1px}
.cert-inner{height:100%;padding:clamp(24px,5%,50px);text-align:center;display:flex;flex-direction:column;
  align-items:center;justify-content:center}
.cert-top{display:flex;align-items:center;gap:12px;margin-bottom:4px}
.cert-bot{font-size:1.5rem;line-height:1}
.cert-brand{font-family:var(--mono);font-weight:600;letter-spacing:.26em;font-size:.74rem;
  text-transform:uppercase;color:var(--ink)}
.cert-kicker{margin:20px 0 0;font-family:var(--mono);font-size:.68rem;font-weight:500;letter-spacing:.36em;
  text-transform:uppercase;color:var(--muted)}
.cert-pre{margin:34px 0 0;font-family:var(--mono);font-size:.68rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim)}
.cert-name{margin:12px 0 0;font-size:clamp(1.9rem,4.6vw,3rem);font-weight:800;letter-spacing:-.045em;
  color:var(--ink);line-height:1.05}
.cert-role{margin:10px 0 0;font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);min-height:1.2em}
.cert-body{margin:22px auto 0;max-width:74%;color:var(--muted);font-size:.91rem;line-height:1.7}
.cert-foot{display:flex;gap:clamp(30px,9%,90px);margin-top:auto;padding-top:32px}
.cert-foot div{display:flex;flex-direction:column;gap:6px;min-width:160px;padding-top:12px;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.cert-foot span{font-family:var(--mono);font-size:.8rem;color:var(--ink);letter-spacing:.05em}
.cert-foot small{font-family:var(--mono);font-size:.61rem;color:var(--dim);letter-spacing:.18em;
  text-transform:uppercase}
.cert-sig{color:var(--muted)!important}
.cert-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
@media print{
  .nav,.profile-bar,footer,.cta-band,.co-nav,.cert-form,.cert-actions,.page-head,.no-print,#toast{display:none!important}
  body,.co-lesson,.co-layout{background:#fff!important;border:0!important;padding:0!important}
  .cert-wrap>.cert{break-inside:avoid;min-width:0;width:100%}
}

/* ---------------- builds ---------------- */
.bd-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.bd-head h2{margin:0 0 9px}
.bd-head p{margin:0;max-width:580px}
.bd-grid{margin-bottom:28px}
.bd-card{display:flex;flex-direction:column;gap:12px}
.bd-top{display:flex;align-items:center;gap:13px}
.bd-ic{font-size:1.2rem;line-height:1;opacity:.85}
.bd-card h3{margin:0;font-size:1.05rem}
.bd-url{font-family:var(--mono);font-size:.75rem;word-break:break-all;color:var(--muted)}
.bd-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:15px;
  font-family:var(--mono);font-size:.67rem;letter-spacing:.09em;text-transform:uppercase;color:var(--dim);
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}
.bd-del{background:none;border:0;color:var(--dim);cursor:pointer;font:inherit;font-family:var(--mono);
  font-size:.67rem;letter-spacing:.09em;text-transform:uppercase;padding:0}
.bd-del:hover{color:var(--bad)}
.bd-empty{padding:52px 32px}
.bd-share{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.bd-share p{margin:0;font-size:.9rem}
.bd-modal{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:22px;
  background:rgba(4,5,7,.88);backdrop-filter:blur(3px)}
.bd-dialog{width:100%;max-width:470px;padding:32px;background:var(--panel);position:relative;
  box-shadow:0 30px 70px -24px var(--shadow)}
.bd-dialog:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--muted),transparent 88%)}
.bd-dialog h3{margin-bottom:20px;font-size:1.3rem}
.bd-dialog textarea{min-height:86px}
.bd-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:26px}

/* ---------------- helpers ---------------- */
.helper-layout{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:start}
@media(max-width:960px){.helper-layout{grid-template-columns:1fr}}
.hr-head{margin:60px 0 28px}
.hr-head h2{margin:0 0 9px}
.hr-head p{max-width:680px;margin:0}
.helper-card{display:flex;flex-direction:column;gap:14px}
.hc-top{display:flex;gap:16px;align-items:center}
.avatar{width:46px;height:46px;flex:none;display:grid;place-items:center;border-radius:0;
  background:var(--panel2)!important;color:var(--ink);font-family:var(--mono);font-weight:600;font-size:.86rem;
  border:1px solid var(--line2)}
.hc-name{font-weight:700;font-size:1.06rem;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hc-role{font-family:var(--mono);font-size:.69rem;letter-spacing:.09em;text-transform:uppercase;
  color:var(--dim);margin-top:4px}
.hc-links{display:flex;gap:20px;flex-wrap:wrap;font-family:var(--mono);font-size:.73rem}
.hc-links a{color:var(--muted)}
.hc-foot{padding-top:18px;margin-top:auto;
  border-top:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:1px 0 0}

/* ---------------- project detail ---------------- */
.proj-head h1{max-width:940px}
.crumb{display:inline-block;font-family:var(--mono);font-size:.76rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted);margin-bottom:20px}
.spec-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:36px}
.spec{padding:18px 20px;background:var(--panel);position:relative}
.spec:before{content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--line2),transparent 92%)}
.spec span{display:block;font-family:var(--mono);font-size:.73rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--dim);margin-bottom:7px}
.spec b{font-size:.89rem;font-weight:600;overflow-wrap:break-word}
.article.proj{max-width:var(--max)}
.article.proj>*{max-width:820px}
.article.proj h2{margin-top:56px;font-size:1.55rem}
.article.proj h2:first-of-type{margin-top:30px}

/* ---------------- subscribe ---------------- */
.subscribe{flex:1;min-width:290px}
.sub-row{display:flex;gap:10px;flex-wrap:wrap}
.sub-row input{flex:1;min-width:190px}
.sub-done{font-family:var(--mono);font-size:.82rem}

::selection{background:var(--sel);color:var(--ink)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:1px}
.btn.primary:focus-visible{outline-color:var(--ink)}
/* never remove focus for keyboard users, even where we restyle */
.wz-opt:focus-visible,.co-opt:focus-visible,.pb-chip:focus-visible,.pb-opt:focus-visible,
.co-navitem:focus-visible,.tickable:focus-visible,.crumb-chip:focus-visible,.bd-del:focus-visible{
  outline:3px solid var(--accent);outline-offset:-3px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------------- guides hub ---------------- */
#guide-list{display:block}
.guide-group{margin-bottom:52px}
.guide-group:last-child{margin-bottom:0}
.guide-topic{font-family:var(--mono);font-size:.78rem;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--dim);margin:0 0 20px;padding-bottom:14px;
  border-bottom:1px solid transparent;border-image:var(--rule-lead) 1;border-image-width:0 0 1px}

/* ---------------- accessibility ---------------- */
.skip-link{position:absolute;left:8px;top:-60px;z-index:200;padding:12px 20px;
  background:var(--accent);color:var(--bg);font-family:var(--mono);font-size:.78rem;
  font-weight:600;letter-spacing:.1em;text-transform:uppercase;transition:top .15s}
.skip-link:focus{top:8px;text-decoration:none}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
/* decorative rules must not be announced or relied on for meaning */
.card:before,.side:before,.spec:before,.wz:before,.co-lesson:before,
.cta-band:before,.pre:before{pointer-events:none}
/* respect a user's contrast preference */
@media(prefers-contrast:more){
  :root{--muted:#c3cad4;--dim:#aeb5bf;--line2:#5a616c;--line:#3c424b}
  :root[data-theme="light"]{--muted:#333b47;--dim:#3d4551;--line2:#8d95a1;--line:#b9c0ca}
  .article a,.co-lesson a{text-decoration-color:currentColor}
}

/* ---------------- end-of-build handoff ---------------- */
.pf{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:32px 34px;background:var(--panel);
  border-left:2px solid transparent;border-image:linear-gradient(180deg,var(--line2),transparent) 1;
  border-image-width:0 0 0 2px}
.pf.is-done{border-image:linear-gradient(180deg,var(--accent),transparent) 1;border-image-width:0 0 0 2px}
.pf-main{max-width:56ch}
.pf-main h2{margin:6px 0 8px;font-size:clamp(1.3rem,2.4vw,1.75rem)}
.pf-main p{margin:0;font-size:.97rem}
.pf-act{display:flex;align-items:center;gap:14px;flex-wrap:wrap;flex:none}
@media(max-width:700px){.pf{padding:26px 22px}.pf-act{width:100%}.pf-act .btn{flex:1 1 auto;text-align:center}}

/* ---------------- measure ----------------
   Any descriptive paragraph that would otherwise inherit the full 1180px
   container. 68ch keeps every one of these inside comfortable reading range;
   measured before this, several ran past 130 characters a line. */
.section>.wrap>p,.section>.wrap>.muted,.path-head .muted,.path-head p,
.cta-band p,.mp-foot p,.empty,.co-intro p{max-width:68ch}
.path-full .why,.path-track .why{max-width:68ch}

/* The strip's next-link is a convenience; the full handoff lives at the foot of
   the page, so here the title is shortened and hard-capped rather than allowed
   to push the layout wide on a phone. */
.ps-next{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* the ask on the certificate screen — kept visually quieter than the certificate */
.cert-next{margin-top:34px}
@media print{.cert-next{display:none!important}}