/* ============================================================================
   Scalp Engine — public home page.
   Depends on core.css ("Deep Signal"). Tokens only; no raw colours.
   ========================================================================= */

/* scroll-reveal must never be able to hide content when JS is absent or broken */
html:not(.js) .reveal{opacity:1;transform:none}

.skip{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-160%);transition:transform .2s var(--ease);
  padding:10px 16px;border-radius:var(--r-pill);
  background:var(--slab-2);border:1px solid var(--edge-2);font-weight:650;font-size:13px;
}
.skip:focus,.skip:focus-visible{transform:none}
main:focus{outline:none}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ============================================================== NAV ==== */
.nav{
  position:sticky;top:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s;
}
.nav.is-stuck{
  background:var(--veil);border-bottom-color:var(--edge);
  backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
}
.nav-in{display:flex;align-items:center;gap:20px}
.mark{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.02em;flex:none}
.mark-glyph{display:block;line-height:0}
.mark-name{font-size:15.5px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:13.5px;color:var(--ink-3)}
.nav-links a{position:relative;padding:4px 0;transition:color .18s}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--sweep);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-cta{display:flex;gap:9px;margin-left:auto;flex:none}
.nav-links+.nav-cta{margin-left:0}
@media(max-width:880px){.nav-links{display:none}}
@media(max-width:420px){.mark-name{display:none}}

/* ============================================================= HERO ==== */
.hero{
  position:relative;overflow:hidden;
  padding:clamp(48px,7vw,92px) 0 clamp(56px,7vw,96px);
}
.tape{position:absolute;inset:0;width:100%;height:100%;opacity:.72;pointer-events:none;z-index:0}
.tape-fade{
  position:absolute;inset:0;pointer-events:none;z-index:1;
  background:
    radial-gradient(ellipse 62% 54% at 26% 46%,var(--void) 18%,var(--veil-2) 58%,transparent 80%),
    linear-gradient(180deg,var(--void) 0%,transparent 24%,transparent 74%,var(--void) 100%);
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;gap:clamp(34px,5vw,58px);align-items:center;
  grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
}
@media(max-width:1000px){.hero-grid{grid-template-columns:minmax(0,1fr)}}

.hero-copy h1{font-size:clamp(34px,4.6vw,56px);margin:14px 0 20px;max-width:15ch}
.hero-copy .lede{max-width:52ch}
.hero-cta{margin-top:28px;gap:12px}
.hero-facts{
  list-style:none;display:flex;flex-wrap:wrap;gap:9px 22px;
  margin-top:26px;font-size:13px;color:var(--ink-3);
}
.hero-facts li{display:flex;align-items:center;gap:8px}
.tick{
  width:15px;height:15px;border-radius:50%;flex:none;
  background:var(--long-dim);border:1px solid var(--long-edge);
  position:relative;
}
.tick::after{
  content:"";position:absolute;left:4px;top:3.5px;width:4px;height:7px;
  border:solid var(--long);border-width:0 1.6px 1.6px 0;transform:rotate(42deg);
}

/* ================================================== LIFECYCLE DEMO ==== */
.demo{position:relative;max-width:520px;margin-left:auto;width:100%}
@media(max-width:1000px){.demo{margin:0 auto}}

.demo-head{margin-bottom:12px;gap:10px;flex-wrap:wrap}
.demo-head .dot{transition:background .3s}
.demo.is-watching .demo-head .dot{background:var(--ink-4)}
.demo.is-armed  .demo-head .dot,
.demo.is-live   .demo-head .dot{background:var(--long);color:var(--long-glow);animation:beacon 2.2s infinite}
.demo.is-short.is-armed .demo-head .dot,
.demo.is-short.is-live  .demo-head .dot{background:var(--short);color:var(--short-glow)}
.demo.is-hit     .demo-head .dot{background:var(--long)}
.demo.is-stopped .demo-head .dot{background:var(--short)}
#demoPhase{color:var(--ink-2);transition:color .3s}

.tag-illus{
  font-family:var(--mono);font-size:10px;letter-spacing:1.3px;text-transform:uppercase;
  color:var(--hold);background:var(--hold-dim);border:1px solid var(--hold-edge);
  padding:4px 10px;border-radius:var(--r-pill);font-weight:650;white-space:nowrap;
}

.sig-host{position:relative;border-radius:var(--r-lg)}
.sig{
  position:relative;overflow:hidden;
  min-height:352px;display:flex;flex-direction:column;gap:18px;
  transition:border-color .4s var(--ease),background .4s var(--ease);
}
.demo.is-armed .sig,.demo.is-live .sig{border-color:var(--long-edge-soft)}
.demo.is-short.is-armed .sig,.demo.is-short.is-live .sig{border-color:var(--short-edge-soft)}
.demo.is-hit .sig{border-color:var(--long-edge-strong)}
.demo.is-stopped .sig{border-color:var(--short-edge-strong)}

/* idle scanning shimmer, only while WATCHING */
.scan{
  position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .4s;
  background:linear-gradient(100deg,transparent 38%,var(--scan-line) 50%,transparent 62%);
  background-size:220% 100%;
}
.demo.is-watching .scan{opacity:1;animation:scan-sweep 3.4s var(--ease-in-out) infinite}
@keyframes scan-sweep{from{background-position:130% 0}to{background-position:-90% 0}}

.sig-top{align-items:flex-start;gap:12px}
.sig-title{font-family:var(--display);font-size:20px;font-weight:700;letter-spacing:-.02em;margin-top:5px;line-height:1.25}
.demo.is-armed .sig-title,.demo.is-live .sig-title,.demo.is-hit .sig-title{color:var(--long)}
.demo.is-short .sig-title{color:var(--short)}
.demo.is-watching .sig-title{color:var(--ink-2)}

.levels{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.lvl{
  background:var(--well-2);border:1px solid var(--edge);border-radius:var(--r-sm);
  padding:11px 12px;display:flex;flex-direction:column;gap:4px;min-width:0;
}
.lvl-k{
  /* a field label is content: --ink-3 is the dimmest ink that still clears 4.5:1 */
  font-family:var(--mono);font-size:9.5px;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--ink-3);font-weight:650;
}
.lvl-v{font-size:clamp(13px,3.3vw,17px);font-weight:650;letter-spacing:-.02em;transition:color .3s}
.demo.is-watching .lvl-v{color:var(--ink-3)}
.lvl.is-target .lvl-v{color:var(--long)}
.lvl.is-stop .lvl-v{color:var(--short)}
.demo.is-watching .lvl.is-target .lvl-v,
.demo.is-watching .lvl.is-stop .lvl-v{color:var(--ink-3)}

.trackbox{display:flex;flex-direction:column;gap:7px}
.trackbox-k{font-family:var(--mono);letter-spacing:.6px}
.demo.is-watching .track{opacity:.4}
.track{transition:opacity .4s}

.sig-foot{align-items:flex-end;gap:14px;margin-top:auto;transition:opacity .34s var(--ease)}
/* The resolve overlay slides up over exactly this row. Hand the space over
   instead of half-covering the premium and ghosting the ring through it. */
.demo.is-hit .sig-foot,.demo.is-stopped .sig-foot{opacity:0}
.prem{display:flex;flex-direction:column;gap:3px;min-width:0}
.prem-v{font-family:var(--display);font-size:26px;font-weight:700;letter-spacing:-.03em;line-height:1.1}
.demo.is-watching .prem-v{color:var(--ink-4)}
.prem-sub{max-width:26ch}

.ringbox{position:relative;width:54px;height:54px;flex:none;display:grid;place-items:center}
.ringbox .ring{position:absolute;inset:0}
#demoRing{stroke-dasharray:131.95;stroke-dashoffset:131.95}
.ring-t{font-size:11.5px;font-weight:650;color:var(--ink-2);position:relative}
/* While WATCHING the dial is off. Dimming the whole box also dimmed the
   "3m" label to ~2:1, so only the ring graphic fades; the label steps down
   the ink ramp instead and stays legible. */
.demo.is-watching .ringbox .ring{opacity:.3}
.demo.is-watching .ring-t{color:var(--ink-3)}
.ringbox .ring,.ring-t{transition:opacity .4s,color .4s}

/* resolve overlay */
.outcome{
  position:absolute;left:0;right:0;bottom:0;padding:16px 22px;
  display:flex;align-items:center;gap:14px;
  border-top:1px solid var(--edge);
  background:linear-gradient(0deg,var(--void),var(--deep));   /* opaque: nothing bleeds through */
  transform:translateY(102%);transition:transform .5s var(--ease);
}
.demo.is-hit .outcome,.demo.is-stopped .outcome{transform:none}
.outcome-ico{flex:none}
.outcome-ico path{opacity:0}          /* only the resolved outcome's glyph is ever drawn */
.ok-path{stroke:var(--long)}
.no-path{stroke:var(--short)}
.demo.is-hit .ok-path,.demo.is-stopped .no-path{opacity:1}
.outcome-k{font-size:12px;font-weight:650;letter-spacing:.4px;color:var(--ink-2);text-transform:uppercase;font-family:var(--mono)}
.outcome-v{font-family:var(--display);font-size:22px;font-weight:750;letter-spacing:-.03em;line-height:1.2}
.demo.is-hit .outcome-v{color:var(--long)}
.demo.is-stopped .outcome-v{color:var(--short)}

.sig .pill{white-space:nowrap}

.demo-narr{margin-top:12px;max-width:46ch}

@media(max-width:520px){
  .hero .eyebrow{letter-spacing:1.4px;font-size:10.5px}
  .sig{padding:17px;gap:15px;min-height:330px}
  .sig-top .eyebrow{letter-spacing:1.2px;font-size:10px}
  .sig-title{font-size:18px}
  .levels{gap:7px}
  .lvl{padding:9px 8px}
  .lvl-k{font-size:9px;letter-spacing:.9px}
  .sig .pill{font-size:10px;padding:4px 9px}
  .prem-v{font-size:23px}
  .outcome{padding:14px 17px;gap:11px}
  .outcome-v{font-size:19px}
}

/* ====================================================== TICKER STRIP === */
.strip{
  border-top:1px solid var(--edge);border-bottom:1px solid var(--edge);
  background:var(--film);padding:13px 0;position:relative;z-index:2;
}
.tick-item{display:flex;align-items:center;gap:9px;white-space:nowrap;font-size:12.5px;color:var(--ink-3)}
.tick-item b{color:var(--ink);font-weight:650;letter-spacing:-.01em}
.tick-item .lot{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.9px;color:var(--ink-2);
  border:1px solid var(--edge);border-radius:var(--r-pill);padding:2px 9px;
}
.tick-item .sep{color:var(--ink-3)}
.tick-item.on b{color:var(--long)}

/* ========================================================== SECTIONS === */
.sec-head{margin-bottom:38px;max-width:64ch}
.sec-head h2{margin:10px 0 14px}
.sec-head .lede{font-size:16.5px}

/* stepper */
.stepper{
  list-style:none;display:grid;gap:14px;
  grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:none;
}
@media(max-width:1000px){.stepper{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.stepper{grid-template-columns:minmax(0,1fr)}}
.step{
  position:relative;padding:22px 20px 24px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--edge);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.step::before{
  content:"";position:absolute;top:-1px;left:20px;right:20px;height:2px;border-radius:2px;
  background:var(--sweep);opacity:.65;
}
.step:nth-child(4)::before{background:var(--sweep-long)}
.step-n{
  display:inline-block;font-size:10.5px;letter-spacing:2px;font-weight:700;
  color:var(--beam-2);margin-bottom:12px;
}
.step:nth-child(2) .step-n{color:var(--hold)}
.step:nth-child(3) .step-n{color:var(--long)}
.step:nth-child(4) .step-n{color:var(--ink-2)}
.step h3{margin-bottom:9px}
.step::after{
  content:"";position:absolute;top:34px;right:-11px;width:8px;height:8px;
  border-top:1.5px solid var(--edge-2);border-right:1.5px solid var(--edge-2);
  transform:rotate(45deg);
}
.step:last-child::after{display:none}
@media(max-width:1000px){.step::after{display:none}}

/* capability cards */
.cap{transition:transform .3s var(--ease),border-color .3s,background .3s}
.cap:hover{transform:translateY(-3px);border-color:var(--edge-2);background:var(--glass-2)}
.cap-ico{
  display:grid;place-items:center;width:40px;height:40px;border-radius:12px;
  background:var(--beam-dim);border:1px solid var(--beam-edge);color:var(--beam-2);
  margin-bottom:15px;
}
.cap h3{margin-bottom:9px}
.cap em{color:var(--ink-2);font-style:italic}
/* Six cards. Auto-fit lands on four columns past ~1180px and strands two on a
   second row, so cap the track count and let it read as a clean 3 x 2. */
@media(min-width:1040px){
  #capabilities .g3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* stats */
.stats{
  margin-top:26px;padding:26px 24px 22px;border-radius:var(--r-lg);
  border:1px solid var(--edge);background:var(--film);
}
.stats-k{margin-bottom:18px;color:var(--ink-3);line-height:1.6;letter-spacing:1.4px}
.stats-grid{gap:14px}
.stat{display:flex;flex-direction:column;gap:5px}
.stat-v{font-family:var(--display);font-size:clamp(28px,4vw,38px);font-weight:750;letter-spacing:-.035em;line-height:1}
.stats-note{margin-top:20px;max-width:74ch}

/* "what this is not" */
.not{border-color:var(--short-edge-faint);background:var(--short-wash)}
.not h3{margin-bottom:8px;color:var(--ink)}
.not h3::before{
  content:"";display:inline-block;width:14px;height:2px;border-radius:2px;
  background:var(--short);vertical-align:middle;margin-right:9px;
}

/* FAQ */
.faq{border-top:1px solid var(--edge)}
.qa{border-bottom:1px solid var(--edge)}
.qa-h{font-size:inherit;font-weight:inherit;letter-spacing:normal;line-height:inherit}
.q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 2px;text-align:left;font-size:16px;font-weight:650;letter-spacing:-.012em;
  color:var(--ink-2);transition:color .2s;
}
.q:hover{color:var(--ink)}
.q[aria-expanded="true"]{color:var(--ink)}
.chev{
  width:11px;height:11px;flex:none;border-right:1.8px solid var(--ink-3);
  border-bottom:1.8px solid var(--ink-3);transform:rotate(45deg) translate(-2px,-2px);
  transition:transform .3s var(--ease),border-color .2s;
}
.q[aria-expanded="true"] .chev{transform:rotate(225deg) translate(-2px,-2px);border-color:var(--beam-2)}
.a{padding:0 2px 22px;max-width:70ch}
.a p{margin:0}

/* CTA band */
.cta-band{padding-bottom:clamp(64px,8vw,110px)}
.cta-band h2{margin-bottom:14px}
.cta-lede{margin:0 auto}
.cta-row{justify-content:center;margin-top:28px;gap:12px}

/* ============================================================ FOOTER === */
.foot{border-top:1px solid var(--edge);padding:34px 0 46px;background:var(--well-2)}
.foot-top{flex-wrap:wrap;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--edge)}
.foot-glyph{color:var(--ink-2);line-height:0}
.foot-name{font-weight:700;letter-spacing:-.02em}
.foot-links{display:flex;flex-wrap:wrap;gap:20px;font-size:13px;color:var(--ink-3)}
.foot-links a:hover{color:var(--ink)}
/* The risk disclaimer is the most important paragraph on the page; it does not
   get the dimmest ink on the page. */
.foot-risk{margin-top:22px;color:var(--ink-3);max-width:104ch;line-height:1.75}
.foot-risk strong{color:var(--ink-2)}

/* ==================================================== REDUCED MOTION === */
@media (prefers-reduced-motion:reduce){
  .demo.is-watching .scan{opacity:0;animation:none}
  .tape{opacity:.34}
  .outcome{transition:none}
}