/* Assembly Floor — assemblyfloor.com
   Industrial precision. Light is canon. The thread is the signature. */

:root{
  --bg:#eef2f7; --panel:#ffffff; --ink:#12294a; --tx:#33475f; --mu:#6b7f96;
  --line:rgba(0,113,188,.20); --ac:#0071BC; --ac2:#0d86d8;
  --hero1:#f7fafd; --hero2:#e4eefa;
  --gr:#00a884; --am:#c9860f; --rd:#d81b22; --pu:#8844CC;
  --earth1:#04070d; --earth2:#0a1f3a; --earth-ink:#c6dcef; --earth-mu:#7d9ab5;
  --shadow:0 2px 14px rgba(18,41,74,.07);
  --r:8px;
  --thread:#0071BC; /* JS repaints this as the story moves */
  --wrap:1120px;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--tx);
  font-family:Rajdhani,system-ui,sans-serif;font-size:17.5px;line-height:1.62;font-weight:500;
  overflow-x:clip}
h1,h2,h3,h4,.eb,.btn,.wm{font-family:Oswald,sans-serif;font-weight:600;letter-spacing:.04em;text-transform:uppercase}
h1,h2,h3,h4{color:var(--ink);margin:0}
p{margin:0 0 1em}
.mono{font-family:'IBM Plex Mono',monospace;font-style:normal}
img{max-width:100%;height:auto;display:block}
a{color:var(--ac)}
::selection{background:rgba(0,113,188,.18)}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---------- the thread (left-edge, full-journey) ---------- */
#thread{position:fixed;top:0;left:0;width:4px;height:100%;z-index:98;pointer-events:none;
  background:rgba(0,113,188,.10)}
#thread i{position:absolute;top:0;left:0;width:100%;height:0;
  background:var(--thread);transition:background .5s;display:block}
#thread b{position:absolute;left:-3px;width:10px;height:10px;border-radius:50%;
  background:var(--thread);transition:background .5s;box-shadow:0 0 10px var(--thread);display:block}
@media (prefers-reduced-motion:reduce){#thread{display:none}}

/* ---------- header ---------- */
#hd{position:fixed;top:0;left:0;right:0;z-index:97;display:flex;align-items:center;
  justify-content:space-between;padding:0 22px;height:58px;
  background:transparent;transition:background .3s,box-shadow .3s}
#hd.on{background:rgba(255,255,255,.92);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
#hd .wm{font-size:15px;letter-spacing:.18em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
#hd .wm i{width:16px;height:3px;background:var(--ac);display:inline-block}
.btn{display:inline-block;background:var(--ac);color:#fff;text-decoration:none;
  font-size:13px;letter-spacing:.14em;padding:11px 22px;border-radius:6px;border:0;cursor:pointer;
  transition:background .2s,transform .15s}
.btn:hover{background:#005e9c}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--ac);box-shadow:inset 0 0 0 2px var(--ac)}
.btn.ghost:hover{background:rgba(0,113,188,.08)}
#hd .btn{padding:9px 18px}

/* ---------- hero ---------- */
.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:80px 22px 110px;position:relative;overflow:hidden;
  background:linear-gradient(165deg,var(--hero1),var(--hero2))}
.hero:before{content:"";position:absolute;inset:0;
  background:radial-gradient(120% 80% at 50% 0%,rgba(0,113,188,.14),transparent 62%)}
.hero .grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent);
  -webkit-mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent)}
.hero .wrap{position:relative;z-index:2}
.hero .eb{font-size:12px;letter-spacing:.32em;color:var(--ac)}
.hero h1{font-size:clamp(54px,15vw,138px);line-height:.9;margin:16px 0 0}
.hero h1 .sub{display:block;color:var(--ac);font-size:clamp(19px,4.6vw,32px);letter-spacing:.07em;margin-top:16px}
.hero p{max-width:44ch;font-size:clamp(17px,4.2vw,21px);margin:26px 0 0}
.hero .cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.hero .meta{margin-top:40px;display:flex;gap:10px 26px;flex-wrap:wrap;
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.1em;color:var(--mu)}
.hero .meta span:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--ac);margin-right:8px;vertical-align:1px}
.hero .scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.3em;color:var(--mu);z-index:2}
.hero .scroll:after{content:"";display:block;width:1px;height:34px;background:var(--ac);
  margin:8px auto 0;animation:drip 1.8s ease-in-out infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}
  55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* load-in */
.up{opacity:0;transform:translateY(18px);animation:up .7s forwards}
@keyframes up{to{opacity:1;transform:none}}
.d1{animation-delay:.1s}.d2{animation-delay:.25s}.d3{animation-delay:.4s}.d4{animation-delay:.55s}.d5{animation-delay:.7s}

/* ---------- sections ---------- */
section{padding:96px 0;position:relative}
.eb{font-size:12px;letter-spacing:.3em;color:var(--ac);display:flex;align-items:center;gap:12px}
.eb:before{content:"";width:26px;height:2px;background:var(--ac);display:inline-block}
.eb .mono{color:var(--mu);letter-spacing:.12em;font-size:11px}
h2{font-size:clamp(32px,6.6vw,58px);line-height:1.02;margin:18px 0 0}
.lede{max-width:56ch;font-size:clamp(17px,4vw,20px);margin:22px 0 0}
.lede strong,.copy strong{color:var(--ink)}
.copy{max-width:60ch}

/* connector spine between sections */
.spine{height:110px;position:relative;pointer-events:none}
.spine:before{content:"";position:absolute;left:50%;top:0;bottom:26px;width:2px;margin-left:-1px;
  background:var(--ac);transform:scaleY(0);transform-origin:top;transition:transform .8s ease}
.spine:after{content:"";position:absolute;left:50%;bottom:14px;width:10px;height:10px;margin-left:-5px;
  border-radius:50%;background:var(--ac);opacity:0;transition:opacity .4s .5s}
.spine.go:before{transform:scaleY(1)}
.spine.go:after{opacity:1}
.spine.amber:before,.spine.amber:after{background:var(--am)}
.spine.green:before,.spine.green:after{background:var(--gr)}

/* reveal on view */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.rv.go{opacity:1;transform:none}
.rv2{transition-delay:.12s}.rv3{transition-delay:.24s}.rv4{transition-delay:.36s}
@media (prefers-reduced-motion:reduce){
  .rv,.spine:before,.spine:after{opacity:1!important;transform:none!important;transition:none!important}
  .up{opacity:1;transform:none;animation:none}
  .hero .scroll:after{animation:none}
}

/* figure cards */
.fig{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden;margin:38px 0 0}
.fig img{width:100%}
.fig figcaption{padding:12px 18px;border-top:1px solid var(--line);
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;color:var(--mu)}

/* pain cards */
.pains{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:38px}
.pain{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--rd);
  border-radius:var(--r);box-shadow:var(--shadow);padding:24px 22px}
.pain .tag{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.22em;color:var(--rd)}
.pain h3{font-size:19px;margin:12px 0 8px;line-height:1.25}
.pain p{margin:0;color:var(--mu);font-size:16px}

/* mechanism rows */
.mech{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-top:74px}
.mech:first-of-type{margin-top:44px}
.mech .fig{margin:0}
.mech h3{font-size:clamp(22px,4.4vw,30px);line-height:1.08}
.mech .k{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.24em;color:var(--ac);display:block;margin-bottom:12px}
.mech p{margin:14px 0 0;font-size:17px}
.mech .pull{color:var(--ink);font-weight:600;font-size:18px}
@media (max-width:880px){.mech{grid-template-columns:1fr;gap:22px}
  .mech.flip .fig{order:-1}}

/* red→green tag micro-interaction */
.tagflip{display:inline-flex;align-items:center;gap:10px;margin-top:16px;
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em}
.tagflip .t{padding:6px 14px;border-radius:4px;color:#fff;background:var(--rd);
  position:relative;transition:background .6s .3s}
.tagflip .t:before{content:"";position:absolute;left:-5px;top:50%;width:8px;height:8px;margin-top:-4px;
  border-radius:50%;background:var(--bg);border:1px solid rgba(0,0,0,.2)}
.tagflip .t span{display:inline-block;min-width:8ch;text-align:center}
.go .tagflip .t{background:var(--gr)}
.tagflip .arrow{color:var(--mu)}

/* serial section */
.serial{display:grid;grid-template-columns:1fr 420px;gap:48px;align-items:start}
.serial .stick{position:sticky;top:80px}
.serial .fig{margin:0}
.qs{margin:30px 0 0;padding:0;list-style:none}
.qs li{padding:16px 0;border-top:1px solid var(--line);color:var(--ink);
  font-family:Oswald,sans-serif;font-weight:500;font-size:clamp(18px,3.6vw,24px);letter-spacing:.02em;
  display:flex;gap:16px;align-items:baseline}
.qs li:last-child{border-bottom:1px solid var(--line)}
.qs .mono{color:var(--ac);font-size:13px}
@media (max-width:960px){.serial{grid-template-columns:1fr}.serial .stick{position:static;max-width:440px}}

/* ---------- the descent ---------- */
#descent{background:linear-gradient(var(--earth1),var(--earth2) 140%);color:var(--earth-ink);padding:0}
#descent .stagewrap{height:520svh;position:relative}
#descent .stage{position:sticky;top:0;height:100svh;overflow:hidden;display:flex;align-items:center;justify-content:center}
#descent svg{position:absolute;inset:0;width:100%;height:100%}
#descent .beat{position:absolute;left:50%;transform:translate(-50%,20px);width:min(640px,88vw);
  text-align:center;opacity:0;transition:opacity .5s,transform .5s;pointer-events:none}
#descent .beat.on{opacity:1;transform:translate(-50%,0)}
#descent .beat h3{color:#fff;font-size:clamp(26px,6vw,46px);line-height:1.05}
#descent .beat p{color:var(--earth-mu);font-size:clamp(15px,3.6vw,18px);margin:14px 0 0}
#descent .beat .mono{color:var(--earth-ink)}
#descent .beat.top{top:12svh}
#descent .beat.bottom{bottom:10svh}
.bignum{font-family:'IBM Plex Mono',monospace;font-weight:500;color:#fff;
  font-size:clamp(56px,14vw,120px);line-height:1;display:block}
.bignum small{display:block;font-family:Oswald,sans-serif;font-size:clamp(12px,2.4vw,15px);
  letter-spacing:.3em;color:var(--am);margin-top:10px;text-transform:uppercase}
#descent .alert{display:inline-block;text-align:left;background:#0b1728;border:1px solid rgba(232,160,32,.5);
  border-left:4px solid var(--am);border-radius:6px;padding:16px 20px;margin-top:18px;
  font-family:'IBM Plex Mono',monospace;font-size:clamp(11px,2.8vw,13px);line-height:1.9;color:var(--earth-ink);
  box-shadow:0 2px 18px rgba(0,0,0,.5)}
#descent .alert b{color:var(--am);letter-spacing:.18em}
#descent .alert .g{color:var(--gr)}
#descent .outro{padding:90px 0 100px}
#descent .outro .fig{background:#0b1728;border-color:rgba(0,113,188,.35)}
#descent .outro .fig figcaption{color:var(--earth-mu);border-color:rgba(0,113,188,.35)}
#descent .outro h2{color:#fff}
#descent .outro .lede{color:var(--earth-ink)}
#descent .outro .eb{color:var(--ac2)}
#descent .stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:44px}
#descent .stat{background:#0b1728;border:1px solid rgba(0,113,188,.35);border-radius:var(--r);padding:22px}
#descent .stat .v{font-family:'IBM Plex Mono',monospace;font-size:clamp(30px,6vw,44px);color:#fff;line-height:1.1}
#descent .stat .l{font-family:Oswald,sans-serif;font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--earth-mu);margin-top:8px;line-height:1.6}
/* reduced-motion / no-js fallback for the descent */
#descent .stagewrap.static{height:auto;padding:90px 0 0}
#descent .stagewrap.static .stage{position:static;height:auto;flex-direction:column;gap:44px;padding:0 22px}
#descent .stagewrap.static .beat{position:static;transform:none;opacity:1;pointer-events:auto}
#descent .stagewrap.static svg{display:none}

/* ---------- assistant ---------- */
#assistant .eb{color:var(--pu)}
#assistant .eb:before{background:var(--pu)}
.bullets{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:34px;
  padding:0;list-style:none}
.bullets li{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:18px 20px;font-size:16px}
.bullets li b{display:block;font-family:Oswald,sans-serif;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;font-size:13.5px;color:var(--ink);margin-bottom:6px}
.asks{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.asks span{background:var(--panel);border:1px solid var(--line);border-radius:999px;
  padding:9px 18px;font-size:15px;color:var(--ink);box-shadow:var(--shadow)}
.asks span:before{content:"“";color:var(--pu)}
.asks span:after{content:"”";color:var(--pu)}

/* office trio */
.trio{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:38px}
.trio .fig{margin:0}

/* case study */
#case{background:var(--ink);color:#c6dcef}
#case .eb{color:var(--ac2)}
#case h2{color:#fff}
#case .lede{color:#c6dcef}
#case .copy{color:#9fb8d4;max-width:64ch}
#case .copy strong{color:#fff}

/* ---------- contact ---------- */
#contact .panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:clamp(24px,5vw,48px);margin-top:38px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px}
@media (max-width:880px){#contact .panel{grid-template-columns:1fr}}
#contact label{display:block;font-family:Oswald,sans-serif;font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink);margin:18px 0 6px}
#contact label:first-child{margin-top:0}
#contact input,#contact textarea{width:100%;border:1px solid var(--line);border-radius:6px;
  background:var(--bg);padding:12px 14px;font-family:Rajdhani,sans-serif;font-size:17px;color:var(--ink)}
#contact input:focus,#contact textarea:focus{outline:2px solid var(--ac);outline-offset:1px;border-color:var(--ac)}
#contact textarea{min-height:120px;resize:vertical}
#contact .send{margin-top:22px;width:100%}
#contact .note{font-size:14px;color:var(--mu);margin-top:14px}
#form-state{margin-top:16px;padding:14px 16px;border-radius:6px;font-size:15.5px;display:none}
#form-state.ok{display:block;background:rgba(0,168,132,.1);border:1px solid var(--gr);color:#00614c}
#form-state.err{display:block;background:rgba(216,27,34,.08);border:1px solid var(--rd);color:#8f1216}
.cf-turnstile{margin-top:20px}

/* ---------- footer ---------- */
footer{background:var(--panel);border-top:1px solid var(--line);padding:64px 0 40px}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px}
@media (max-width:880px){footer .cols{grid-template-columns:1fr 1fr}}
@media (max-width:520px){footer .cols{grid-template-columns:1fr}}
footer .wm{font-size:16px;letter-spacing:.18em;color:var(--ink);display:flex;align-items:center;gap:10px}
footer .wm i{width:16px;height:3px;background:var(--ac);display:inline-block}
footer .tag{color:var(--mu);font-size:15px;margin-top:12px;max-width:30ch}
footer h4{font-size:12.5px;letter-spacing:.2em;color:var(--mu)}
footer ul{list-style:none;padding:0;margin:14px 0 0}
footer li{margin:9px 0}
footer a{color:var(--tx);text-decoration:none;font-size:15.5px}
footer a:hover{color:var(--ac)}
footer .base{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;color:var(--mu)}

/* ---------- subpages ---------- */
.page{padding:130px 0 90px;min-height:70svh}
.page h1{font-size:clamp(34px,7vw,58px);line-height:1.04}
.page .updated{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--mu);margin:14px 0 34px}
.page h2{font-size:clamp(20px,4vw,27px);margin:40px 0 12px}
.page p,.page li{max-width:70ch}
.page ul{padding-left:22px}

/* focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--ac);outline-offset:2px}