/* ============================================================
   aiprify — "Redacted Dossier, in 3D". A classified case-file
   aesthetic taken into depth: manila paper, warm ink, one
   stamped-red accent, serif + mono, black redaction bars, and a
   physical stack of documents you can tilt. Self-contained:
   no external fonts / scripts / trackers.
   ============================================================ */

:root {
  --paper:   #efe7d4;   /* manila */
  --paper-2: #f6f0e2;   /* lighter card stock */
  --paper-3: #e7dec8;   /* darker inset */
  --ink:     #1a1712;   /* warm near-black */
  --ink-2:   #423b2c;
  --faint:   #8b8065;
  --rule:    rgba(26,23,18,0.18);
  --rule-2:  rgba(26,23,18,0.34);
  --redact:  #14110b;   /* redaction bar */
  --stamp:   #b23122;   /* classified red */
  --stamp-2: #932619;

  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --maxw: 1160px;
  --shadow: 0 30px 60px -24px rgba(26,23,18,.55), 0 8px 20px -12px rgba(26,23,18,.4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
em { font-style: italic; }
b { font-weight: 700; }
code { font-family: var(--mono); font-size: 0.84em; background: rgba(26,23,18,.06); padding: .06em .34em; border-radius: 3px; }
.wordmark { font-family: var(--serif); font-weight: 800; letter-spacing: -0.01em; }
.mono, .kicker, .fileno, .clsbar, .nav-links a, .sec-no, .memo-no, .doc-flag, .doc-line,
.doc-divider span, .doc-foot, .demo-label, .counter, .chip, .reg th, .reg td.code,
.step-no, .kit-no, .lg-cap, .req-stamp, .foot-fine, .foot-links a, .scroll-cue span, .doc-tab {
  font-family: var(--mono);
}

/* ---------------------------------------------------------------- backdrop */
.backdrop { position: fixed; inset: 0; z-index: -2; pointer-events: none; overflow: hidden; }
.grain {
  position: absolute; inset: 0; opacity: .5; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
}
.vignette { position: absolute; inset: 0; background: radial-gradient(120% 90% at 50% 8%, transparent 40%, rgba(26,23,18,.10) 100%); }
.watermark {
  position: absolute; top: 40%; left: 50%; transform: translate(-50%,-50%) rotate(-19deg);
  font-family: var(--mono); font-weight: 700; font-size: min(23vw, 300px);
  letter-spacing: .06em; color: var(--ink); opacity: .035; white-space: nowrap;
}

/* floating field of redaction tokens, in depth */
.field { position: absolute; inset: 0; perspective: 900px; transform-style: preserve-3d;
  transform: translate3d(calc(var(--px,0) * 26px), calc(var(--py,0) * 26px), 0); transition: transform .3s ease-out; }
.tok {
  position: absolute; font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: .06em;
  color: var(--paper-2); background: var(--redact); padding: 3px 9px; border-radius: 2px;
  white-space: nowrap; box-shadow: 0 8px 18px -8px rgba(26,23,18,.5);
  will-change: transform, opacity; animation: drift linear infinite;
}
.tok.ghost { color: transparent; background: transparent; border: 1px dashed var(--rule-2); }
@keyframes drift {
  0%   { transform: translate3d(var(--tx), 110vh, var(--tz)) rotate(var(--tr)); opacity: 0; }
  8%   { opacity: .9; }
  92%  { opacity: .9; }
  100% { transform: translate3d(var(--tx), -20vh, var(--tz)) rotate(var(--tr)); opacity: 0; }
}

/* ---------------------------------------------------------------- ticker */
.clsbar {
  position: sticky; top: 0; z-index: 40; overflow: hidden;
  background: var(--ink); color: var(--paper);
  font-size: 11px; letter-spacing: .18em; height: 30px; display: flex; align-items: center;
  border-bottom: 1px solid #000;
}
.clsbar-track { display: inline-flex; gap: 0; white-space: nowrap; animation: ticker 34s linear infinite; }
.clsbar-track span { padding: 0 14px; }
.clsbar-track .sep { color: var(--stamp); opacity: .9; padding: 0 2px; }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------------------------------------------------------------- nav */
.nav {
  position: sticky; top: 30px; z-index: 30;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease, backdrop-filter .25s ease;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(8px) saturate(1.1);
  box-shadow: 0 1px 0 var(--rule), 0 14px 30px -22px rgba(26,23,18,.5);
  border-radius: 0 0 14px 14px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .mark { color: var(--ink); display: inline-flex; }
.brand .wordmark { font-size: 23px; }
.fileno { font-size: 10px; letter-spacing: .12em; color: var(--faint); border-left: 1px solid var(--rule); padding-left: 10px; }
.nav-links { display: flex; gap: 22px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.nav-links a { color: var(--ink-2); position: relative; padding: 4px 0; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 1.5px; background: var(--stamp); transition: width .2s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 12px; }

/* buttons */
.btn, .ghost {
  font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  padding: 10px 16px; border-radius: 8px; display: inline-flex; align-items: center; gap: 8px;
  transition: transform .12s ease, box-shadow .2s ease, background .2s ease;
}
.btn { background: var(--ink); color: var(--paper); box-shadow: 0 10px 22px -12px rgba(26,23,18,.7); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -12px rgba(26,23,18,.8); }
.ghost { border: 1.5px solid var(--rule-2); color: var(--ink); }
.ghost:hover { transform: translateY(-2px); border-color: var(--ink); }
.btn.big, .ghost.big { font-size: 13px; padding: 14px 22px; }

/* ---------------------------------------------------------------- HERO / 3D */
.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  padding: 40px 24px 60px;
  max-width: var(--maxw); margin: 0 auto;
}
.stage {
  position: relative;
  perspective: 1500px;
  perspective-origin: 62% 42%;
}
.scene {
  position: absolute; inset: -6% -4% 0 auto; width: 54%; height: 118%;
  transform-style: preserve-3d;
  transform: rotateX(calc(-7deg + var(--ry, 0deg))) rotateY(var(--rx, 0deg));
  transition: transform .18s ease-out;
  pointer-events: none;
}
.layer { position: absolute; inset: 0; transform-style: preserve-3d; }

/* deep coordinate grid */
.scene-grid {
  transform: translateZ(-360px) translateY(-6%) scale(1.9);
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(60% 60% at 55% 45%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(60% 60% at 55% 45%, #000 30%, transparent 75%);
  opacity: .6;
}

/* stack of case-file documents */
.stack { transform: translateZ(40px); display: grid; place-items: center; }
.doc {
  position: absolute; width: min(420px, 40vw); background: var(--paper-2);
  border: 1px solid var(--rule); border-radius: 4px; box-shadow: var(--shadow);
  transform-style: preserve-3d;
}
.doc-3 { height: 480px; transform: translate3d(46px, 34px, -70px) rotateZ(6.5deg); background: var(--paper-3); }
.doc-2 { height: 500px; transform: translate3d(24px, 16px, -34px) rotateZ(-3.2deg); }
.doc-1 {
  min-height: 512px; padding: 26px 26px 22px; transform: translate3d(-8px, -8px, 0) rotateZ(-0.6deg);
  background:
    repeating-linear-gradient(transparent 0 30px, rgba(26,23,18,.05) 30px 31px),
    var(--paper-2);
}
.doc-tab {
  position: absolute; top: -15px; left: 26px; font-size: 10px; letter-spacing: .14em;
  background: var(--ink); color: var(--paper); padding: 4px 12px; border-radius: 3px 3px 0 0;
  box-shadow: 0 6px 14px -8px rgba(0,0,0,.6);
}
.doc-tab.red { background: var(--stamp); }
.doc-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 12px; padding-top: 4px; }
.memo-no { font-size: 12px; letter-spacing: .14em; color: var(--stamp); font-weight: 700; }
.doc-flag { font-size: 11px; color: var(--faint); }
.doc-line { font-family: var(--mono); font-size: 12px; letter-spacing: .04em; color: var(--ink-2); margin: 0 0 14px; padding-bottom: 12px; border-bottom: 1px dashed var(--rule-2); }
.memo { font-size: 16px; line-height: 1.55; margin: 0; min-height: 3.1em; transition: opacity .35s ease; }
.memo.raw .pii { background: rgba(178,49,34,.14); box-shadow: inset 0 -6px 0 rgba(178,49,34,.22); border-radius: 2px; padding: 0 2px; }
.doc-divider { display: flex; align-items: center; gap: 10px; margin: 16px 0; color: var(--faint); font-size: 10px; letter-spacing: .18em; }
.doc-divider::before, .doc-divider::after { content: ""; height: 1px; background: var(--rule); flex: 1; }
.doc-foot { margin-top: 18px; padding-top: 12px; border-top: 1px solid var(--rule); font-size: 11px; letter-spacing: .1em; }
.doc-foot .ok { color: #2f6b3d; }
.stamp {
  position: absolute; right: 18px; bottom: 60px; transform: rotate(-14deg);
  font-family: var(--mono); font-weight: 800; font-size: 30px; letter-spacing: .06em;
  color: var(--stamp); border: 3px solid var(--stamp); padding: 4px 12px; border-radius: 6px;
  opacity: .82; box-shadow: 0 0 0 1px rgba(178,49,34,.15) inset; mix-blend-mode: multiply;
}

/* redaction bars carrying coded placeholders — the signature move */
.rdct {
  display: inline-block; background: var(--redact); color: var(--paper-2);
  font-family: var(--mono); font-size: .8em; letter-spacing: .04em; font-weight: 700;
  padding: 1px 7px; border-radius: 2px; box-shadow: 0 1px 0 rgba(0,0,0,.4);
  transform: translateY(1px); animation: seal .32s ease both;
}
@keyframes seal { from { transform: translateY(1px) scaleX(.4); opacity: 0; } to { transform: translateY(1px) scaleX(1); opacity: 1; } }

/* hero copy */
.hero-copy { position: relative; z-index: 2; max-width: 620px; }
.kicker { font-size: 12px; letter-spacing: .28em; color: var(--stamp); margin: 0 0 18px; }
.hero-title { font-size: clamp(38px, 6vw, 74px); line-height: 1.02; letter-spacing: -0.02em; font-weight: 800; margin: 0 0 22px; }
.redact-word { position: relative; display: inline-block; color: var(--ink); }
.rw-text { position: relative; z-index: 1; }
.rw-bar {
  position: absolute; inset: 4% -4px; background: var(--redact); border-radius: 4px; z-index: 2;
  transform-origin: left center; transition: transform .7s cubic-bezier(.7,0,.2,1);
}
.redact-word.opened .rw-bar { transform: scaleX(0); }
.hero-sub { font-size: clamp(17px, 1.7vw, 20px); color: var(--ink-2); max-width: 34em; margin: 0 0 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.hero-meta { display: flex; align-items: center; gap: 14px; font-family: var(--mono); font-size: 12px; letter-spacing: .04em; color: var(--faint); }
.hero-meta i { width: 4px; height: 4px; border-radius: 50%; background: var(--stamp); display: inline-block; }

.scroll-cue {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
  display: inline-flex; flex-direction: column; align-items: center; gap: 6px;
  font-size: 10px; letter-spacing: .2em; color: var(--faint);
}
.scroll-cue svg { animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(5px); } }

/* ---------------------------------------------------------------- bands */
.band { position: relative; padding: 92px 24px; }
.band.alt { background: linear-gradient(var(--paper-3), color-mix(in srgb, var(--paper-3) 60%, var(--paper))); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.wrap { max-width: var(--maxw); margin: 0 auto; }
.sec-head { max-width: 720px; margin-bottom: 44px; }
.sec-no { display: inline-block; font-size: 12px; letter-spacing: .2em; color: var(--stamp); margin-bottom: 12px; }
.sec-head h2 { font-size: clamp(26px, 3.4vw, 40px); line-height: 1.12; letter-spacing: -0.01em; margin: 0 0 14px; font-weight: 800; }
.sec-head p { color: var(--ink-2); font-size: 18px; margin: 0; }

/* tilt cards (JS drives --tx/--ty) */
.tilt { transform-style: preserve-3d; transition: transform .18s ease-out, box-shadow .25s ease; }
.tilt.tilting { transform: perspective(1000px) rotateX(var(--ty,0deg)) rotateY(var(--tx,0deg)) translateY(-3px); }

/* ---------------------------------------------------------------- demo */
.demo {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: stretch;
  background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: 14px; padding: 22px;
  box-shadow: var(--shadow);
}
.demo-col { display: flex; flex-direction: column; min-width: 0; }
.demo-label { font-size: 11px; letter-spacing: .1em; color: var(--faint); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.demo-label .counter { margin-left: auto; color: var(--ink); background: var(--ink); color: var(--paper); padding: 2px 8px; border-radius: 20px; font-size: 10px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.live { background: #2f6b3d; box-shadow: 0 0 0 0 rgba(47,107,61,.5); animation: pulse 1.8s infinite; }
.dot.seal { background: var(--stamp); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(47,107,61,.5); } 70% { box-shadow: 0 0 0 8px rgba(47,107,61,0); } 100% { box-shadow: 0 0 0 0 rgba(47,107,61,0); } }
#demoInput, .demo-out {
  flex: 1; min-height: 210px; font-family: var(--mono); font-size: 13.5px; line-height: 1.7;
  padding: 16px; border-radius: 10px; border: 1px solid var(--rule); background: var(--paper);
  white-space: pre-wrap; word-break: break-word;
}
#demoInput { resize: vertical; color: var(--ink); outline: none; }
#demoInput:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(26,23,18,.08); }
.demo-out { background: #17140e; color: #d8cfb6; border-color: #000; overflow: auto; }
.demo-out .rdct { transform: none; }
.demo-arrow { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: var(--faint); }
.demo-arrow span { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip { font-size: 11px; letter-spacing: .04em; background: var(--paper); border: 1px solid var(--rule-2); border-radius: 20px; padding: 4px 10px; color: var(--ink-2); }
.chip b { color: var(--stamp); }

/* ---------------------------------------------------------------- steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { position: relative; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 14px; padding: 28px 24px; box-shadow: 0 20px 40px -28px rgba(26,23,18,.5); }
.step-no { font-size: 13px; letter-spacing: .1em; color: var(--paper); background: var(--stamp); display: inline-block; padding: 4px 10px; border-radius: 4px; margin-bottom: 16px; }
.step h3 { font-size: 21px; margin: 0 0 10px; letter-spacing: -0.01em; }
.step p { color: var(--ink-2); font-size: 16px; margin: 0; }

/* ---------------------------------------------------------------- registry */
.registry { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.reg { width: 100%; border-collapse: collapse; }
.reg th { text-align: left; font-size: 10px; letter-spacing: .16em; color: var(--faint); padding: 16px 22px; border-bottom: 1px solid var(--rule-2); background: var(--paper-3); }
.reg td { padding: 14px 22px; border-bottom: 1px solid var(--rule); vertical-align: middle; }
.reg tr:last-child td { border-bottom: none; }
.reg tr:hover td { background: rgba(178,49,34,.05); }
.reg td.code { font-size: 12px; font-weight: 700; color: var(--stamp); width: 90px; letter-spacing: .06em; }
.reg td.cat { font-weight: 700; font-size: 17px; }
.reg td.method { color: var(--ink-2); font-size: 15px; }

/* ---------------------------------------------------------------- ledger */
.ledger { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.lg { background: var(--ink); color: var(--paper); border-radius: 14px; padding: 30px 24px; text-align: left; box-shadow: var(--shadow); }
.lg-num { display: block; font-family: var(--serif); font-weight: 800; font-size: clamp(40px, 5vw, 60px); line-height: 1; letter-spacing: -0.02em; }
.lg-cap { display: block; margin-top: 12px; font-size: 11px; letter-spacing: .1em; color: color-mix(in srgb, var(--paper) 72%, transparent); text-transform: uppercase; }
.lg:first-child .lg-num { color: var(--paper); }
.lg:not(:first-child) .lg-num { color: var(--stamp); }

/* ---------------------------------------------------------------- kits */
/* auto-fit with a CAP, not 1fr: with a single kit a 1fr column stretches the
   card across the whole band, which reads like a layout bug. Capped and
   centred, one card looks deliberate and several still line up. */
.kits { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 320px)); gap: 18px; justify-content: center; }
.kit { display: flex; flex-direction: column; gap: 8px; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 14px; padding: 24px; box-shadow: 0 20px 40px -30px rgba(26,23,18,.5); }
.kit-no { font-size: 10px; letter-spacing: .14em; color: var(--faint); }
.kit h3 { font-size: 20px; margin: 2px 0 2px; }
.kit p { color: var(--ink-2); font-size: 14.5px; margin: 0; flex: 1; }
.kit-go { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--stamp); margin-top: 8px; }
.kit:hover .kit-go { text-decoration: underline; }

/* ---------------------------------------------------------------- requisition */
.requisition .req {
  position: relative; text-align: center; background: var(--paper-2);
  border: 1px solid var(--rule-2); border-radius: 18px; padding: 56px 32px; box-shadow: var(--shadow);
  max-width: 760px; margin: 0 auto; overflow: hidden;
}
.req-stamp {
  position: absolute; top: 20px; right: -46px; transform: rotate(12deg);
  background: var(--stamp); color: var(--paper); font-size: 11px; letter-spacing: .16em;
  padding: 6px 60px;
}
.req h2 { font-size: clamp(28px, 4vw, 46px); margin: 0 0 14px; letter-spacing: -0.02em; }
.req p { color: var(--ink-2); font-size: 18px; max-width: 44em; margin: 0 auto 28px; }
.req-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------------------------------------------------------------- footer */
.foot { border-top: 1px solid var(--rule-2); padding: 40px 24px; background: var(--paper-3); }
.foot-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.foot .wordmark { font-size: 20px; margin-right: 10px; }
.foot-fine { font-size: 11px; letter-spacing: .06em; color: var(--faint); }
.foot-links { display: flex; gap: 20px; font-size: 12px; }
.foot-links a { color: var(--ink-2); }
.foot-links a:hover { color: var(--stamp); }

/* ---------------------------------------------------------------- reveal */
.reveal { opacity: 0; transform: translateY(26px) rotateX(9deg); transform-origin: top; transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- redaction scanner */
.scanner { background: var(--paper-2); border: 1px solid var(--rule-2); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.scan-head { display: flex; align-items: center; gap: 12px; padding: 13px 20px; background: var(--ink); color: var(--paper); border-bottom: 1px solid #000; }
.scan-title { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; }
.scan-status { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: #7dd68f; border: 1px solid rgba(125,214,143,.45); padding: 2px 9px; border-radius: 20px; }
.scan-status.done { color: #e7dcc0; border-color: rgba(231,220,192,.4); }
.scan-head .counter { margin-left: auto; background: var(--stamp); color: var(--paper); padding: 3px 11px; border-radius: 20px; font-size: 10px; letter-spacing: .06em; }
.scan-head .dot.live { background: #7dd68f; animation: pulseG 1.8s infinite; }
@keyframes pulseG { 0% { box-shadow: 0 0 0 0 rgba(125,214,143,.55);} 70% { box-shadow: 0 0 0 8px rgba(125,214,143,0);} 100% { box-shadow: 0 0 0 0 rgba(125,214,143,0);} }

.scan-bed {
  position: relative; background: #14110b; color: #d8cfb6;
  font-family: var(--mono); font-size: 14px; line-height: 1.95;
  padding: 24px; min-height: 250px; overflow: hidden;
  background-image: repeating-linear-gradient(transparent 0 calc(1.95em - 1px), rgba(255,255,255,.035) calc(1.95em - 1px) 1.95em);
}
.scan-raw { position: relative; z-index: 1; white-space: pre-wrap; word-break: break-word; }
.scan-raw .pii { color: #f0d9a0; }
.scan-bars { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.scan-bars .bar {
  position: absolute; display: flex; align-items: center; justify-content: center;
  background: #000; color: #cdbf9c; font-size: 10.5px; letter-spacing: .03em; font-weight: 700;
  padding: 0 6px; border-radius: 2px; box-shadow: 0 0 0 1px #000, 0 6px 12px -6px rgba(0,0,0,.9);
  transform: scaleX(0); transform-origin: left center; opacity: 0; white-space: nowrap;
  transition: transform .26s cubic-bezier(.3,1.35,.5,1), opacity .18s;
}
.scan-bars .bar.on { transform: scaleX(1); opacity: 1; }
.scan-beam {
  position: absolute; left: 0; right: 0; top: 0; height: 2px; z-index: 3; opacity: 0;
  background: linear-gradient(90deg, transparent, #7dd68f 28%, #d9ffe6 50%, #7dd68f 72%, transparent);
  box-shadow: 0 0 18px 3px rgba(125,214,143,.55);
}
.scan-beam.on { opacity: 1; }
.scan-beam::after { content:""; position: absolute; left: 0; right: 0; bottom: 0; height: 64px; background: linear-gradient(rgba(125,214,143,.16), transparent); }
.scan-corner { position: absolute; width: 13px; height: 13px; border: 2px solid rgba(125,214,143,.45); z-index: 4; }
.scan-corner.tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.scan-corner.tr { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.scan-corner.bl { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.scan-corner.br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }

.scan-edit { padding: 16px 20px; border-top: 1px solid var(--rule); background: var(--paper-3); }
.scan-elabel { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--faint); margin-bottom: 10px; }
#demoInput { width: 100%; min-height: 88px; resize: vertical; font-family: var(--mono); font-size: 13px; line-height: 1.7; color: var(--ink); background: var(--paper); border: 1px solid var(--rule); border-radius: 10px; padding: 12px 14px; outline: none; }
#demoInput:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(26,23,18,.08); }
.scan-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding: 14px 20px; border-top: 1px solid var(--rule); }
.scan-hint { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.scan-foot .chips { margin-left: auto; margin-top: 0; }

/* ---------------------------------------------------------------- evidence board */
.board { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ev {
  position: relative; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 10px;
  padding: 22px 18px 18px; box-shadow: 0 16px 32px -26px rgba(26,23,18,.5); transform-style: preserve-3d;
}
.ev::before {
  content: ""; position: absolute; top: -6px; left: 50%; transform: translateX(-50%);
  width: 11px; height: 11px; border-radius: 50%; background: var(--stamp);
  box-shadow: 0 3px 5px rgba(0,0,0,.4), inset 0 -2px 3px rgba(0,0,0,.35), inset 0 2px 2px rgba(255,255,255,.3);
}
.ev-code { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--paper); background: var(--ink); padding: 3px 9px; border-radius: 3px; display: inline-block; }
.ev h4 { font-size: 18px; margin: 13px 0 6px; letter-spacing: -0.01em; }
.ev p { font-family: var(--mono); font-size: 11.5px; line-height: 1.55; color: var(--ink-2); margin: 0; }

/* a touch more depth on the scroll-reveal */
.reveal { opacity: 0; transform: translateY(34px) rotateX(13deg) scale(.985); transform-origin: top; transition: opacity .75s ease, transform .75s cubic-bezier(.2,.75,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { min-height: auto; padding-top: 30px; }
  .scene { position: relative; inset: auto; width: 100%; height: 420px; margin-top: 30px; transform: rotateX(-4deg); }
  .doc { width: min(360px, 82vw); }
  .steps, .kits { grid-template-columns: 1fr; }
  .ledger { grid-template-columns: repeat(2, 1fr); }
  .board { grid-template-columns: repeat(2, 1fr); }
  .scroll-cue { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .fileno { display: none; }
  .ledger { grid-template-columns: 1fr; }
  .board { grid-template-columns: 1fr; }
  .stamp { font-size: 22px; }
  .scan-bed { font-size: 12.5px; }
}

/* ---------------------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  .scene { transform: rotateX(-6deg) !important; }
  .tok, .clsbar-track, .dot.live, .scroll-cue svg { animation: none !important; }
  .field { display: none; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .tilt.tilting { transform: none !important; }
  .rdct { animation: none; }
  .scan-beam { display: none !important; }
  .scan-head .dot.live { animation: none !important; }
  .scan-bars .bar { transition: none !important; }
}