/* Shelf Engineering v2 — "one lit line"
   The shelf is a single glowing horizontal line, reinterpreted per page:
   home = a shelf of items collapsing to one · how-it-works = a circuit a pulse travels
   adoption = the baseline stats stand on · for-businesses = a prompt line */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#080b0e;
  --card:#0d1117;
  --surface:#161b22;
  --border:#262e3a;
  --border-hover:#354050;
  --text:#d0d7e0;
  --text-bright:#ecf0f5;
  --text-muted:#7d8a98;
  --text-dim:#4e5c6a;

  --cyan:#00d4e0;
  --cyan-muted:#4a8090;
  --cyan-dim:rgba(0,212,224,.1);
  --cyan-glow:rgba(0,212,224,.35);

  --amber:#f0a020;
  --amber-muted:#8a7540;
  --amber-dim:rgba(240,160,32,.1);
  --amber-glow:rgba(240,160,32,.35);

  --green:#3dd68c;
  --green-dim:rgba(61,214,140,.1);

  --font-display:'Instrument Serif',Georgia,serif;
  --font-mono:'JetBrains Mono','SF Mono',monospace;
  --font-body:'Outfit',-apple-system,sans-serif;
}

html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* grain */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:9999;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat:repeat;background-size:180px;
}

.wrap{max-width:1060px;margin:0 auto;width:100%;padding:0 2.5rem}

/* ── nav ── */
header{border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;background:rgba(8,11,14,.82);backdrop-filter:blur(10px)}
nav{display:flex;justify-content:space-between;align-items:center;padding:1.4rem 2.5rem;max-width:1060px;margin:0 auto;width:100%}
.logo{font-family:var(--font-mono);font-weight:700;font-size:.82rem;color:var(--text-dim);text-decoration:none;letter-spacing:.02em;text-transform:uppercase;transition:color .4s}
.logo:hover{color:var(--text-muted)}
.logo .m{color:var(--cyan)} .logo .w{color:var(--amber)}
.nav-links{display:flex;gap:1.8rem;align-items:center}
.nav-links a{font-family:var(--font-mono);font-size:.74rem;color:var(--text-muted);text-decoration:none;letter-spacing:.03em;transition:color .3s}
.nav-links a:hover{color:var(--text-bright)}
.nav-links a.cta{color:var(--amber);border:1px solid var(--amber-muted);border-radius:3px;padding:.4rem .8rem}
.nav-links a.cta:hover{background:var(--amber-dim);color:var(--amber)}

main{flex:1;width:100%}

/* ── type scaffolding ── */
.kicker{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--amber);margin-bottom:1.5rem}
.kicker.cyan{color:var(--cyan)}
section{padding:5.5rem 0}
section + section{border-top:1px solid var(--border)}
.section-head{margin-bottom:2.6rem;max-width:680px}
.section-head .kicker{margin-bottom:1rem}
.section-head h2{font-family:var(--font-display);font-weight:400;font-size:clamp(1.9rem,3.8vw,2.6rem);color:var(--text-bright);letter-spacing:-.01em;line-height:1.1}
.section-head p{margin-top:1rem;color:var(--text-muted);font-weight:300;font-size:1.06rem}
.lead{font-size:1.14rem;color:var(--text-muted);max-width:640px;font-weight:300}
em{font-style:italic}

/* ── hero ── */
.hero{padding:6.5rem 0 0;border-top:none}
.hero h1{font-family:var(--font-display);font-weight:400;font-size:clamp(2.9rem,7.2vw,5.2rem);line-height:1.02;color:var(--text-bright);letter-spacing:-.015em;max-width:16ch}
.hero h1 em{color:var(--amber)}
.hero .lead{margin-top:1.8rem;font-size:1.18rem}
.hero-stagger{opacity:0;transform:translateY(14px);animation:heroRise .8s cubic-bezier(.2,.7,.2,1) forwards}
.hero-stagger:nth-child(1){animation-delay:.05s}
.hero-stagger:nth-child(2){animation-delay:.15s}
.hero-stagger:nth-child(3){animation-delay:.28s}
.hero-stagger:nth-child(4){animation-delay:.4s}
@keyframes heroRise{to{opacity:1;transform:none}}

.btn-row{display:flex;gap:1rem;flex-wrap:wrap;margin-top:2.4rem}
.btn{font-family:var(--font-mono);font-size:.8rem;text-decoration:none;padding:.78rem 1.35rem;border-radius:3px;letter-spacing:.02em;transition:all .3s;display:inline-flex;align-items:center;gap:.5rem}
.btn-primary{background:var(--amber);color:#1a1206;font-weight:700}
.btn-primary:hover{box-shadow:0 0 24px var(--amber-glow)}
.btn-ghost{border:1px solid var(--border-hover);color:var(--text-muted)}
.btn-ghost:hover{border-color:var(--cyan-muted);color:var(--text-bright)}

/* ── THE LINE — shared shelf-line visual language ── */
.shelfline{display:block;width:100%;height:auto}
.shelfline .rail{stroke:var(--border-hover);stroke-width:1}
.shelfline .rail.lit{stroke:var(--cyan);filter:drop-shadow(0 0 6px var(--cyan-glow))}
.shelfline .rail.lit-amber{stroke:var(--amber);filter:drop-shadow(0 0 6px var(--amber-glow))}

/* line draws itself in when revealed */
.draw path,.draw line{stroke-dasharray:1200;stroke-dashoffset:1200}
.revealed .draw path,.revealed .draw line{animation:drawIn 1.4s cubic-bezier(.3,.6,.2,1) forwards}
@keyframes drawIn{to{stroke-dashoffset:0}}

/* ── reveal on scroll ── */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.revealed{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}.reveal.d2{transition-delay:.22s}.reveal.d3{transition-delay:.34s}

/* ── venue test (home) ── */
.eras{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:3px;overflow:hidden;margin-top:2.4rem}
.era{background:var(--card);padding:1.9rem 1.7rem 1.7rem;position:relative}
.era .when{font-family:var(--font-mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.14em;display:block;margin-bottom:.9rem;color:var(--text-dim)}
.era.now .when{color:var(--cyan)}
.era.mid .when{color:var(--cyan-muted)}
.era.next .when{color:var(--amber)}
.era h3{font-family:var(--font-display);font-weight:400;font-size:1.5rem;color:var(--text-bright);margin-bottom:.6rem}
.era p{font-size:.9rem;color:var(--text-muted)}
.era .mini{margin:1.2rem 0 .2rem;height:56px}
.era .shelf-note{margin-top:1rem;padding-top:.9rem;border-top:1px solid var(--border);font-family:var(--font-mono);font-size:.68rem;color:var(--text-dim);letter-spacing:.03em}
.era .shelf-note b{font-weight:400}
.era.now .shelf-note b{color:var(--cyan)}
.era.mid .shelf-note b{color:var(--cyan-muted)}
.era.next .shelf-note b{color:var(--amber)}

/* mini shelf bars */
.mini .bar-item{fill:var(--cyan);opacity:.85}
.mini .bar-dim{fill:var(--cyan-muted);opacity:.25}
.mini .bar-one{fill:var(--cyan);filter:drop-shadow(0 0 5px var(--cyan-glow))}
.mini .beam{fill:url(#beamGrad)}
.mini .ghost{fill:var(--text-dim);opacity:.28}
.revealed .mini .bar-item{animation:barPop .5s ease forwards}
.mini .scanbeam{animation:scan 3.2s ease-in-out infinite}
@keyframes scan{0%,100%{transform:translateX(0)}50%{transform:translateX(96px)}}

/* ── two-sided contrast (old/new shelf) ── */
.contrast{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:2.4rem}
.panel{background:var(--card);border:1px solid var(--border);border-radius:3px;padding:2rem;position:relative;overflow:hidden}
.panel::before{content:"";position:absolute;top:0;left:0;right:0;height:2px}
.panel.cyan::before{background:linear-gradient(90deg,var(--cyan),transparent 70%)}
.panel.amber::before{background:linear-gradient(90deg,var(--amber),transparent 70%)}
.panel .tag{font-family:var(--font-mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.12em;padding:.22rem .55rem;border-radius:3px;display:inline-block;margin-bottom:1.1rem}
.panel.cyan .tag{color:var(--cyan);background:var(--cyan-dim)}
.panel.amber .tag{color:var(--amber);background:var(--amber-dim)}
.panel.green .tag{color:var(--green);background:var(--green-dim)}
.panel h3{font-family:var(--font-display);font-weight:400;font-size:1.55rem;color:var(--text-bright);margin-bottom:.8rem}
.panel p{font-size:.94rem;color:var(--text-muted)}
.panel ul{list-style:none;margin-top:.4rem}
.panel li{position:relative;padding-left:1.25rem;margin-bottom:.65rem;font-size:.92rem;color:var(--text)}
.panel li::before{content:"›";position:absolute;left:0;color:var(--cyan-muted)}
.panel.amber li::before{color:var(--amber-muted)}
.panel.green li::before{content:"+";color:var(--green);font-weight:700}
.panel.dim li::before{content:"−";color:var(--text-dim)}
.panel.dim .tag{color:var(--text-muted);background:rgba(125,138,152,.08)}

/* ── circuit diagram (how it works) ── */
.circuit-wrap{margin-top:2.6rem;background:var(--card);border:1px solid var(--border);border-radius:3px;padding:2.4rem 2rem 1.6rem;overflow-x:auto}
.circuit{display:block;min-width:640px;width:100%;height:auto}
.circuit text{font-family:var(--font-mono)}
.circuit .node{fill:var(--surface);stroke:var(--border-hover);stroke-width:1}
.circuit .node-label{fill:var(--text-bright);font-size:13px;letter-spacing:.06em;text-transform:uppercase;font-weight:700}
.circuit .node-num{fill:var(--text-dim);font-size:10px;letter-spacing:.1em}
.circuit .sub-label{fill:var(--text-muted);font-size:11px}
.circuit .wire{stroke:var(--border-hover);stroke-width:1;fill:none}
.circuit .wire-lit{stroke:var(--amber);stroke-width:1.5;fill:none;filter:drop-shadow(0 0 4px var(--amber-glow))}
.circuit .pulse-path{stroke:var(--amber);stroke-width:2;fill:none;stroke-dasharray:26 660;stroke-dashoffset:686;filter:drop-shadow(0 0 6px var(--amber-glow))}
.revealed .circuit .pulse-path{animation:pulseTravel 4.5s linear infinite .8s}
@keyframes pulseTravel{to{stroke-dashoffset:0}}
.circuit .leaf{fill:var(--cyan-dim);stroke:var(--cyan-muted);stroke-width:1}
.circuit .leaf-label{fill:var(--cyan);font-size:10.5px;letter-spacing:.04em}
.circuit-caption{font-family:var(--font-mono);font-size:.68rem;color:var(--text-dim);margin-top:1.2rem;letter-spacing:.03em}

/* ── timeline (past/present/future) ── */
.timeline{margin-top:2.6rem;position:relative}
.timeline .track{height:1px;background:linear-gradient(90deg,var(--text-dim),var(--cyan) 50%,var(--amber));opacity:.7;position:relative}
.revealed .timeline .track::after{content:"";position:absolute;top:-2px;width:5px;height:5px;border-radius:3px;background:var(--amber);box-shadow:0 0 10px var(--amber-glow);animation:trackGlide 6s ease-in-out infinite}
@keyframes trackGlide{0%,100%{left:0}50%{left:calc(100% - 5px)}}
.tl-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:1.8rem}
.tl-col .when{font-family:var(--font-mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.14em;margin-bottom:.6rem}
.tl-col.past .when{color:var(--text-dim)}
.tl-col.present .when{color:var(--cyan)}
.tl-col.future .when{color:var(--amber)}
.tl-col h4{font-family:var(--font-display);font-weight:400;font-size:1.3rem;color:var(--text-bright);margin-bottom:.5rem}
.tl-col p{font-size:.88rem;color:var(--text-muted)}

/* ── stats on the baseline (adoption) ── */
.statline{margin-top:3rem}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem;align-items:end}
.stat .num{font-family:var(--font-display);font-size:clamp(3rem,6vw,4.6rem);line-height:1;color:var(--cyan);letter-spacing:-.02em}
.stat.amber .num{color:var(--amber)}
.stat .label{font-size:.95rem;color:var(--text);margin-top:.7rem;max-width:30ch}
.stat .src{margin-top:1rem}
.stat .src a{font-family:var(--font-mono);font-size:.64rem;color:var(--text-dim);letter-spacing:.06em;text-decoration:none;border:1px solid var(--border);border-radius:3px;padding:.32rem .6rem;display:inline-block;transition:color .3s,border-color .3s}
.stat .src a:hover{color:var(--text-muted);border-color:var(--border-hover)}
.baseline{height:1px;background:linear-gradient(90deg,var(--cyan-muted),var(--cyan) 40%,var(--amber-muted));margin-top:2.6rem;position:relative;opacity:.8}
.baseline::after{content:"";position:absolute;inset:-1px 0;box-shadow:0 0 14px var(--cyan-glow)}
.figures-note{font-family:var(--font-mono);font-size:.68rem;color:var(--text-dim);margin-top:1.4rem;letter-spacing:.02em}

/* ── prompt console (for businesses) ── */
.console{margin-top:2.6rem;background:var(--card);border:1px solid var(--border);border-radius:3px;overflow:hidden}
.console-bar{display:flex;align-items:center;gap:.5rem;padding:.7rem 1.1rem;border-bottom:1px solid var(--border);background:var(--surface)}
.console-bar span{width:9px;height:9px;border-radius:3px;background:var(--border-hover)}
.console-bar .t{width:auto;height:auto;background:none;font-family:var(--font-mono);font-size:.64rem;color:var(--text-dim);letter-spacing:.1em;text-transform:uppercase;margin-left:.4rem}
.console-body{padding:1.6rem 1.4rem;font-family:var(--font-mono);font-size:.88rem;line-height:2.1}
.console-body .pline{display:block;color:var(--text);opacity:0;transform:translateY(4px);transition:opacity .5s ease,transform .5s ease}
.console-body .pline.on{opacity:1;transform:none}
.console-body .pmark{color:var(--amber);margin-right:.7rem}
.console-body .pline em{color:var(--cyan);font-style:normal}
.console-body .cursor{display:inline-block;width:.55em;height:1.1em;background:var(--amber);vertical-align:text-bottom;margin-left:.35rem;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.console-foot{padding:1rem 1.4rem;border-top:1px solid var(--border);font-size:.86rem;color:var(--text-muted)}

/* ── control spectrum: control → influence → visibility → out of reach ── */
.spectrum{margin-top:2.8rem}
.spec-track{height:1px;background:linear-gradient(90deg,var(--green),var(--cyan) 34%,var(--cyan-muted) 64%,var(--text-dim));opacity:.85;position:relative}
.revealed .spec-track::after{content:"";position:absolute;top:-2px;left:0;width:5px;height:5px;border-radius:3px;background:var(--green);box-shadow:0 0 10px rgba(61,214,140,.4)}
.spec-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:1.7rem;margin-top:1.8rem}
.band .when{font-family:var(--font-mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.14em;margin-bottom:.7rem}
.band.ctrl .when{color:var(--green)}
.band.infl .when{color:var(--cyan)}
.band.vis .when{color:var(--cyan-muted)}
.band.out .when{color:var(--text-dim)}
.band h4{font-family:var(--font-display);font-weight:400;font-size:1.25rem;color:var(--text-bright);margin-bottom:.7rem}
.band ul{list-style:none}
.band li{position:relative;padding-left:1.15rem;margin-bottom:.6rem;font-size:.87rem;color:var(--text-muted)}
.band.ctrl li::before{content:"+";position:absolute;left:0;color:var(--green);font-weight:700}
.band.infl li::before{content:"›";position:absolute;left:0;color:var(--cyan)}
.band.vis li::before{content:"○";position:absolute;left:0;color:var(--cyan-muted);font-size:.7em;top:.35em}
.band.out li::before{content:"−";position:absolute;left:0;color:var(--text-dim)}

/* per-stat arrival channel */
.stat .via{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:.8rem}
.stat .via.choice{color:var(--cyan)}
.stat .via.default{color:var(--amber)}
.stat .via.effect{color:var(--text-muted)}

/* ── how we help: three steps on a line ── */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:2.4rem}
.step{background:var(--card);border:1px solid var(--border);border-radius:3px;padding:1.8rem;position:relative}
.step .stag{font-family:var(--font-mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.12em;display:inline-block;margin-bottom:1rem;padding:.22rem .55rem;border-radius:3px}
.step:nth-child(1) .stag,.step:nth-child(2) .stag{color:var(--cyan);background:var(--cyan-dim)}
.step:nth-child(3) .stag{color:var(--amber);background:var(--amber-dim)}
.step h3{font-family:var(--font-display);font-weight:400;font-size:1.45rem;color:var(--text-bright);margin-bottom:.7rem}
.step p{font-size:.9rem;color:var(--text-muted)}

/* ── takeaway rule ── */
.takeaway{margin-top:2.2rem;padding:1.4rem 1.6rem;border-left:2px solid var(--green);background:var(--green-dim);border-radius:3px;font-size:1rem;color:var(--text);max-width:720px}

/* ── notes ledger ── */
.notes-list{margin-top:2.6rem;border-top:1px solid var(--border)}
a.note-row{display:grid;grid-template-columns:150px 1fr auto;gap:1.8rem;align-items:baseline;padding:1.7rem .4rem;border-bottom:1px solid var(--border);text-decoration:none;transition:background .3s}
a.note-row:hover{background:var(--card)}
.note-row .ntag{font-family:var(--font-mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.14em}
.note-row .ntag.cyan{color:var(--cyan)}
.note-row .ntag.amber{color:var(--amber)}
.note-row h3{font-family:var(--font-display);font-weight:400;font-size:1.5rem;color:var(--text-bright);line-height:1.15}
.note-row p{font-size:.9rem;color:var(--text-muted);margin-top:.4rem;max-width:56ch}
.note-row .arrow{font-family:var(--font-mono);font-size:.8rem;color:var(--text-dim);transition:color .3s,transform .3s}
a.note-row:hover .arrow{color:var(--cyan);transform:translateX(4px)}
@media (max-width:820px){
  a.note-row{grid-template-columns:1fr;gap:.5rem}
  .note-row .arrow{display:none}
}

/* ── final CTA ── */
.cta-final{border-top:1px solid var(--border);text-align:center;padding:6rem 0}
.cta-final h2{font-family:var(--font-display);font-weight:400;font-size:clamp(2rem,4.4vw,3.1rem);color:var(--text-bright);margin-bottom:1rem;letter-spacing:-.01em}
.cta-final p{color:var(--text-muted);max-width:520px;margin:0 auto 2.2rem;font-weight:300}

/* ── footer ── */
footer{border-top:1px solid var(--border);padding:2.5rem 0}
.footer-inner{display:flex;justify-content:space-between;align-items:center;max-width:1060px;margin:0 auto;padding:0 2.5rem;font-family:var(--font-mono);font-size:.72rem;color:var(--text-dim)}
.footer-inner .m{color:var(--cyan)} .footer-inner .w{color:var(--amber)}

/* ── page intro (subpages) ── */
.page-intro{padding:5.5rem 0 4rem;border-top:none}
.page-intro h1{font-family:var(--font-display);font-weight:400;font-size:clamp(2.5rem,5.4vw,3.9rem);line-height:1.04;color:var(--text-bright);letter-spacing:-.012em;max-width:20ch}
.page-intro h1 em{color:var(--amber)}
.page-intro .lead{margin-top:1.6rem}

/* ── reduced motion: everything lands instantly ── */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .hero-stagger,.reveal{opacity:1!important;transform:none!important}
  .draw path,.draw line,.circuit .pulse-path{stroke-dasharray:none!important;stroke-dashoffset:0!important}
  .console-body .pline{opacity:1!important;transform:none!important}
}

@media (max-width:820px){
  .wrap{padding:0 1.4rem}
  nav{padding:1.2rem 1.4rem}
  .nav-links{gap:1rem}
  .nav-links a:not(.cta){display:none}
  .eras,.contrast,.tl-cols,.stat-row,.steps{grid-template-columns:1fr}
  .spec-cols{grid-template-columns:1fr 1fr;gap:2rem 1.6rem}
  .stat-row{gap:2.6rem}
  .hero{padding-top:4.5rem}
  section{padding:4rem 0}
}