/* ============================================================
   FOLLOW THE CLICK · v2 — the neural cut
   A 3D point-cloud brain lives behind the page. Every chapter,
   it reorganises into a new formation. Scroll = flight.
   ============================================================ */
:root{
  --brand:#0d7f49; --brand-hi:#2fb872;
  --product:#ce2a6c; --product-hi:#ee5b95;
  --neutral:#8b8f98;
  --night:#0b0c0e; --night-2:#131417; --night-line:#26282d;
  --day:#fafaf8; --day-raised:#fff; --day-line:#e7e7e3;
  --ink:#16171a; --ink-muted:#5b5e66; --ink-subtle:#8b8e96;
  --w-ink:#f5f6f7; --w-muted:#a8acb4; --w-subtle:#71757e;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --r:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--night);color:var(--w-ink);font-family:var(--font);
  font-size:1.0625rem;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3,p{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block}
.wrap{max-width:1200px;margin-inline:auto;padding-inline:24px}
a:focus-visible,button:focus-visible{outline:2px solid var(--brand-hi);outline-offset:2px;border-radius:4px}

/* ---------- the brain ---------- */
#brain{position:fixed;inset:0;z-index:0;pointer-events:none}

/* ---------- header ---------- */
.hdr{position:fixed;inset:0 0 auto;z-index:50;height:60px;display:flex;align-items:center;
  background:color-mix(in srgb,var(--night) 78%,transparent);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.08)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;width:100%}
.mark{font-size:1.125rem;font-weight:600;letter-spacing:-.03em;color:#fff}
.mark span{color:var(--brand-hi)}
.hdr nav{display:flex;gap:28px;align-items:center}
.hdr nav a{font-size:.9375rem;color:var(--w-muted);transition:color .15s}
.hdr nav a:hover{color:#fff}
.hdr .cta{background:var(--brand);color:#fff;border-radius:8px;padding:9px 16px;
  font-size:.9375rem;font-weight:500;transition:background .15s}
.hdr .cta:hover{background:var(--brand-hi)}
.menu-toggle{display:none;width:40px;height:40px;border:1px solid rgba(255,255,255,.14);border-radius:11px;
  align-items:center;justify-content:center;flex-direction:column;gap:6px;padding:0;
  transition:background .2s,border-color .2s,transform .2s}
.menu-toggle:hover{border-color:var(--brand-hi);transform:translateY(-1px)}
.menu-toggle span{width:17px;height:1px;background:currentColor;transition:transform .2s ease}
.menu-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.menu-toggle[aria-expanded="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.mobile-menu{display:none}
body.day-mode .hdr{background:color-mix(in srgb,var(--day) 86%,transparent);border-bottom-color:var(--day-line)}
body.day-mode .mark{color:var(--ink)}
body.day-mode .hdr nav a{color:var(--ink-muted)}
body.day-mode .hdr nav a:hover{color:var(--ink)}
body.day-mode .hdr .cta,body.day-mode .hdr .cta:hover{color:#fff}
.hdr,.mark,.hdr nav a{transition:background-color .5s,color .5s,border-color .5s}

/* ---------- HUD ---------- */
.hud{position:fixed;left:26px;top:50%;transform:translateY(-50%);z-index:40;display:grid;gap:13px}
.hud a{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-size:.5625rem;
  text-transform:uppercase;letter-spacing:.12em;color:var(--w-subtle);transition:color .2s}
.hud i{width:6px;height:6px;border-radius:50%;background:currentColor;font-style:normal;flex:none;transition:box-shadow .2s}
.hud a.on{color:#fff}
.hud a.on i{box-shadow:0 0 8px currentColor}
.hud a.c-m.on{color:var(--product-hi)} .hud a.c-g.on{color:var(--brand-hi)}
body.day-mode .hud a{color:#b9bcc2} body.day-mode .hud a.on{color:var(--ink)}
body.day-mode .hud a.c-m.on{color:var(--product)} body.day-mode .hud a.c-g.on{color:var(--brand)}
@media(max-width:1150px){.hud{display:none}}

/* ---------- hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;z-index:2;
  text-align:center;padding:120px 0 80px}
.hero .wrap{width:100%}
.tick{display:inline-flex;align-items:baseline;gap:10px;font-family:var(--mono);font-size:.6875rem;
  text-transform:uppercase;letter-spacing:.1em;color:var(--w-subtle);margin-bottom:28px}
.tick b{font-weight:400;color:var(--w-ink);font-variant-numeric:tabular-nums;font-size:.8125rem}
.tick .pulse{width:6px;height:6px;border-radius:50%;background:var(--brand-hi);align-self:center;
  animation:pulse 2.2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{font-size:clamp(3.4rem,9.5vw,8.5rem);font-weight:650;letter-spacing:-.045em;line-height:.98;color:#fff}
.hero h1 em{font-style:normal;background:linear-gradient(96deg,#f27ba8,var(--product-hi) 55%,#b82360);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{max-width:56ch;margin:30px auto 0;font-size:1.1875rem;line-height:1.55;color:var(--w-muted)}
.hero .start{display:inline-flex;flex-direction:column;align-items:center;gap:10px;margin-top:52px;
  font-family:var(--mono);font-size:.625rem;text-transform:uppercase;letter-spacing:.14em;color:var(--w-subtle)}
.hero .start svg{width:14px;height:22px;animation:drop 1.8s ease-in-out infinite}
@keyframes drop{0%,100%{transform:translateY(0);opacity:.9}50%{transform:translateY(7px);opacity:.4}}

/* ---------- stations ---------- */
.station{min-height:100vh;display:flex;align-items:center;position:relative;z-index:2;padding:70px 0}
.station .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;width:100%}
.station .cell{grid-column:1;max-width:560px;position:relative}
.station.flip .cell{grid-column:2;justify-self:end}
.bignum{position:absolute;top:-.55em;left:-.12em;z-index:-1;font-size:clamp(7rem,16vw,15rem);
  font-weight:700;letter-spacing:-.04em;line-height:1;color:transparent;
  -webkit-text-stroke:1.5px rgba(255,255,255,.07);user-select:none;pointer-events:none}
.stamp{display:inline-flex;align-items:center;gap:12px;font-family:var(--mono);font-size:.6875rem;
  text-transform:uppercase;letter-spacing:.11em;margin-bottom:18px}
.stamp .t{color:var(--w-subtle)}
.stamp .who{padding:4px 10px;border-radius:4px;border:1px solid}
.who.n{color:var(--neutral);border-color:rgba(139,143,152,.4)}
.who.m{color:var(--product-hi);border-color:color-mix(in srgb,var(--product-hi) 45%,transparent)}
.who.g{color:var(--brand-hi);border-color:color-mix(in srgb,var(--brand-hi) 45%,transparent)}
.station h2{font-size:clamp(2.1rem,4.4vw,3.4rem);font-weight:640;letter-spacing:-.03em;line-height:1.05;color:#fff}
.station .body{margin-top:20px;color:var(--w-muted);max-width:52ch}
.station .body+.body{margin-top:12px}

/* content sits on translucent slabs so the brain reads through */
.slab{background:color-mix(in srgb,var(--night) 62%,transparent);border:1px solid rgba(255,255,255,.07);
  border-radius:16px;padding:34px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
@supports not (backdrop-filter:blur(6px)){.slab{background:rgba(11,12,14,.88)}}

.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out}
.rv.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}

.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.chips span{font-size:.875rem;color:var(--w-muted);border:1px solid var(--night-line);
  border-radius:8px;padding:8px 14px;background:rgba(19,20,23,.82)}
.chips span.lit{color:#fff;border-color:var(--neutral)}

.panel{background:rgba(19,20,23,.86);border:1px solid var(--night-line);border-radius:var(--r);
  padding:22px;font-size:.875rem}
.panel .ph{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;
  font-family:var(--mono);font-size:.625rem;text-transform:uppercase;letter-spacing:.1em;color:var(--w-subtle)}
.row{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--night-line);color:var(--w-muted)}
.row:first-of-type{border-top:0}
.row .nm{flex:1;color:var(--w-ink)}
.bar{width:70px;height:4px;border-radius:2px;background:#26282d;overflow:hidden;flex:none}
.bar i{display:block;height:100%;background:var(--product-hi);width:var(--w)}
.tag{font-family:var(--mono);font-size:.5625rem;text-transform:uppercase;letter-spacing:.08em;
  padding:3px 7px;border-radius:4px}
.tag.hot{background:color-mix(in srgb,var(--product-hi) 16%,transparent);color:var(--product-hi)}
.tag.ok{background:color-mix(in srgb,var(--brand-hi) 16%,transparent);color:var(--brand-hi)}
.tag.run{background:rgba(120,160,255,.14);color:#9db9ff}
.cap{margin-top:10px;font-family:var(--mono);font-size:.5625rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--w-subtle);text-align:right}

.web{border:1px solid var(--night-line);border-radius:14px;overflow:hidden;background:#fff;color:var(--ink)}
.web .wbar{display:flex;align-items:center;gap:6px;padding:9px 13px;background:#f4f4f2;border-bottom:1px solid #e5e5e2}
.web .wbar i{width:8px;height:8px;border-radius:50%;background:#d9d9d5}
.web .wurl{margin-left:8px;font-family:var(--mono);font-size:.5625rem;color:#9a9a96}
.web .wbody{padding:18px}
.web .wt{font-weight:650;font-size:1rem;letter-spacing:-.02em}
.web .ws{font-size:.75rem;color:#71757b;margin-top:3px}
.web .wsearch{margin-top:12px;display:flex;gap:8px}
.web .wsearch b{flex:1;height:34px;border:1.5px solid var(--brand);border-radius:8px;
  display:flex;align-items:center;padding:0 12px;font-weight:400;font-size:.8125rem;color:#3c3f45}
.web .wsearch span{height:34px;display:flex;align-items:center;padding:0 14px;border-radius:8px;
  background:var(--brand);color:#fff;font-size:.8125rem;font-weight:500}
.web .wres{margin-top:12px;border:1px solid #e8e8e5;border-radius:8px;padding:11px 13px}
.web .wres+.wres{margin-top:8px}
.web .wres b{display:block;font-size:.8125rem;color:#0d5cb6;font-weight:500}
.web .wres span{display:block;font-size:.6875rem;color:#71757b;margin-top:2px}
.web .wres .ad{font-family:var(--mono);font-size:.5rem;letter-spacing:.06em;color:var(--brand);
  border:1px solid var(--brand-line,#bfe3cf);border-radius:3px;padding:1px 4px;margin-right:6px;vertical-align:1px}

.ledger{background:rgba(19,20,23,.86);border:1px solid var(--night-line);border-radius:var(--r);padding:22px}
.ledger .lrow{display:flex;justify-content:space-between;align-items:baseline;padding:11px 0;
  border-top:1px solid var(--night-line);font-size:.9375rem;color:var(--w-muted)}
.ledger .lrow:first-child{border-top:0}
.ledger .lrow b{font-family:var(--mono);font-size:.8125rem;font-weight:400}
.ledger .in b{color:var(--neutral)}
.ledger .out{color:var(--w-ink)} .ledger .out b{color:var(--brand-hi)}
.ledger .net{border-top:1px dashed #3a3d44}
.ledger .net b{color:#fff;font-size:.9375rem}
.loopnote{display:inline-flex;align-items:center;gap:10px;margin-top:26px;
  font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;letter-spacing:.1em;color:var(--product-hi)}
.loopnote i{display:inline-block;font-style:normal;animation:spin 3.5s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- daylight ---------- */
.day{background:var(--day);color:var(--ink);position:relative;z-index:2;border-top:1px solid var(--day-line)}
.day .inner{padding-block:110px 40px}
.day .kick{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;letter-spacing:.11em;color:var(--ink-subtle)}
.day h2{font-size:clamp(2.4rem,5.5vw,4.2rem);font-weight:650;letter-spacing:-.035em;line-height:1.02}
.day .lead{font-size:1.1875rem;color:var(--ink-muted);max-width:58ch;margin-top:22px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:52px}
.stats>div{background:var(--day-raised);border:1px solid var(--day-line);border-radius:var(--r);padding:26px}
.stats b{display:block;font-size:2rem;font-weight:650;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.stats span{display:block;font-family:var(--mono);font-size:.625rem;text-transform:uppercase;
  letter-spacing:.09em;color:var(--ink-subtle);margin-top:8px;line-height:1.6}
.stats .g b{color:var(--brand)}
.doors{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:64px}
.door{position:relative;border-radius:16px;padding:34px;overflow:hidden;display:flex;flex-direction:column;
  min-height:300px;border:1px solid var(--day-line);background:var(--day-raised);
  transition:transform .25s,border-color .25s,box-shadow .25s}
.door:hover{transform:translateY(-4px)}
.door.m:hover{border-color:var(--product);box-shadow:0 24px 48px -24px color-mix(in srgb,var(--product) 35%,transparent)}
.door.g:hover{border-color:var(--brand);box-shadow:0 24px 48px -24px color-mix(in srgb,var(--brand) 35%,transparent)}
.door::before{content:"";position:absolute;inset:0 0 auto;height:3px}
.door.m::before{background:var(--product)} .door.g::before{background:var(--brand)}
.door .dl{font-family:var(--mono);font-size:.625rem;text-transform:uppercase;letter-spacing:.1em}
.door.m .dl{color:var(--product)} .door.g .dl{color:var(--brand)}
.door h3{font-size:1.625rem;font-weight:650;letter-spacing:-.025em;margin-top:10px}
.door p{color:var(--ink-muted);font-size:.9375rem;margin-top:10px;max-width:44ch}
.door ul{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:7px}
.door li{font-size:.875rem;color:var(--ink-muted);display:flex;gap:9px;align-items:baseline}
.door li::before{content:"—";flex:none}
.door.m li::before{color:var(--product)} .door.g li::before{color:var(--brand)}
.door .go{margin-top:auto;padding-top:22px;font-weight:550;font-size:.9375rem;display:inline-flex;gap:7px;align-items:center}
.door.m .go{color:var(--product)} .door.g .go{color:var(--brand)}
.door .go::after{content:"→";transition:transform .2s}
.door:hover .go::after{transform:translateX(4px)}
.finale{text-align:center;padding-block:110px 90px}
.finale h2{font-size:clamp(2.2rem,5vw,3.6rem)}
.btnrow{display:flex;gap:12px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;min-height:48px;padding:0 24px;border-radius:9px;
  font-size:1rem;font-weight:550;transition:background .15s,border-color .15s,transform .15s}
.btn-g{background:var(--brand);color:#fff}
.btn-g:hover{background:var(--brand-hi);transform:translateY(-1px)}
.btn-o{border:1px solid #d5d5d0;color:var(--ink)}
.btn-o:hover{border-color:var(--ink)}
.ft{border-top:1px solid var(--day-line);padding:34px 0;display:flex;justify-content:space-between;
  gap:18px;flex-wrap:wrap;font-size:.875rem;color:var(--ink-subtle)}
.ft .mark{color:var(--ink);font-size:1rem}

@media(max-width:900px){
  .station .wrap{grid-template-columns:1fr}
  .station.flip .cell{grid-column:1;justify-self:start}
  .station{min-height:100vh;min-height:100svh;padding-block:21vh;padding-block:21svh}
  .doors,.stats{grid-template-columns:1fr}
  .hdr nav a:not(.cta){display:none}
  .hdr nav{gap:10px}
  .menu-toggle{display:flex}
  .mobile-menu{position:fixed;top:72px;right:24px;width:min(300px,calc(100vw - 48px));z-index:49;display:grid;
    background:linear-gradient(145deg,rgba(22,24,27,.98),rgba(11,12,14,.98));padding:10px;
    border:1px solid color-mix(in srgb,var(--brand-hi) 22%,rgba(255,255,255,.1));border-radius:18px;
    box-shadow:0 28px 70px rgba(0,0,0,.42),0 3px 14px rgba(0,0,0,.24);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);visibility:hidden;opacity:0;
    transform:translateY(-8px) scale(.97);transform-origin:top right;pointer-events:none;
    transition:opacity .2s ease,transform .25s cubic-bezier(.2,.8,.2,1),visibility .2s}
  .mobile-menu::before{content:"";position:absolute;right:18px;top:-6px;width:12px;height:12px;
    background:#15171a;border-left:1px solid color-mix(in srgb,var(--brand-hi) 22%,rgba(255,255,255,.1));
    border-top:1px solid color-mix(in srgb,var(--brand-hi) 22%,rgba(255,255,255,.1));transform:rotate(45deg)}
  .mobile-menu.open{visibility:visible;opacity:1;transform:none;pointer-events:auto}
  .mobile-menu a{display:grid;grid-template-columns:30px 1fr 18px;align-items:center;min-height:52px;
    padding:0 12px;border-radius:11px;font-size:1rem;font-weight:600;letter-spacing:-.015em;
    transition:background .16s,color .16s,transform .16s}
  .mobile-menu a::before{font-family:var(--mono);font-size:.625rem;letter-spacing:.08em;color:var(--w-subtle)}
  .mobile-menu a:nth-child(1)::before{content:"01"}.mobile-menu a:nth-child(2)::before{content:"02"}
  .mobile-menu a:nth-child(3)::before{content:"03"}.mobile-menu a:nth-child(4)::before{content:"04"}
  .mobile-menu a::after{content:"↗";font-size:.875rem;color:var(--w-subtle);transition:transform .16s,color .16s}
  .mobile-menu a:hover,.mobile-menu a:focus-visible{background:rgba(47,184,114,.12);color:var(--brand-hi);transform:translateX(2px)}
  .mobile-menu a:hover::after,.mobile-menu a:focus-visible::after{color:var(--brand-hi);transform:translate(2px,-2px)}
  body.menu-open{overflow:hidden}
  body.day-mode .menu-toggle{color:var(--brand);border-color:color-mix(in srgb,var(--brand) 45%,transparent)}
  body.day-mode .menu-toggle[aria-expanded="true"]{color:#fff}
  body.day-mode .mobile-menu{background:linear-gradient(145deg,#fff,var(--day));color:var(--ink);
    border-color:color-mix(in srgb,var(--brand) 18%,var(--day-line));box-shadow:0 28px 70px rgba(16,24,20,.2),0 3px 12px rgba(16,24,20,.08)}
  body.day-mode .mobile-menu::before{background:#fff;border-color:color-mix(in srgb,var(--brand) 18%,var(--day-line))}
  body.day-mode .mobile-menu a::before,body.day-mode .mobile-menu a::after{color:var(--ink-subtle)}
  body.day-mode .mobile-menu a:hover,body.day-mode .mobile-menu a:focus-visible{background:color-mix(in srgb,var(--brand) 10%,#fff);color:var(--brand)}
  .slab{padding:24px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* loading screen — chapter zero */
#loader{position:fixed;inset:0;z-index:200;background:#0b0c0e;display:flex;
  align-items:center;justify-content:center;transition:opacity .34s ease}
#loader.out{opacity:0;pointer-events:none}
#loader canvas{width:100%;height:100%}
#loader .wm{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  margin-top:calc(min(28vw,28vh) + 18px);
  font-weight:700;font-size:clamp(1.15rem,3.4vw,1.9rem);letter-spacing:.34em;
  padding-left:.34em;color:#f5f6f7;opacity:0;transition:opacity .45s ease}
#loader.wm-in .wm{opacity:1}