/* ── Design tokens — Brand System v2 (Branding/guidelines/Onefy_Brand_System.md §5) ──
   Copied from apps/onescan/public/styles.css so both surfaces stay one system.
   Monochrome: color never in UI, only via real assets. Light canvas 70/20/10. */
:root {
  --white:      #FFFFFF;
  --pure-black: #000000;
  --black:      #0A0A0A;
  --gray-900:   #1A1A1A;
  --gray-700:   #3D3D3D;
  --gray-500:   #737373;
  --gray-300:   #D4D4D4;
  --gray-100:   #F4F4F4;
  --ink-100: rgba(10,10,10,1.00);
  --ink-85:  rgba(10,10,10,0.85);
  --ink-60:  rgba(10,10,10,0.62);
  --ink-50:  rgba(10,10,10,0.52);
  --ink-30:  rgba(10,10,10,0.34);
  --ink-10:  rgba(10,10,10,0.12);
  --ink-05:  rgba(10,10,10,0.05);
  --ease: cubic-bezier(0.16,1,0.3,1);
  --font-display: 'Space Grotesk', sans-serif;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', Menlo, monospace;
  --radius-card: 14px; --radius-btn: 9px;
  --gutter: 24px;
  --nav-h: 68px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body { background: var(--white); color: var(--gray-700); font-family: var(--font-sans);
  font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
::selection { background: var(--black); color: var(--white); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); color: var(--black); margin: 0; font-weight: 500; text-wrap: balance; }
.lead, .closer, .punch-center { text-wrap: pretty; }
p { margin: 0; }
.mono { font-family: var(--font-mono); }
.wrap { position: relative; z-index: 2; max-width: 1240px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap.narrow { max-width: 920px; }
.center { text-align: center; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--black); color: var(--white);
  padding: 10px 14px; border-radius: 8px; text-decoration: none; }
.skip:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--black); outline-offset: 3px; }

/* ── Scene: faint scanner grid + light that follows the cursor ── */
.scene { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.scene-grid { position: absolute; inset: 0; opacity: .55;
  background-image: linear-gradient(var(--ink-05) 1px, transparent 1px), linear-gradient(90deg, var(--ink-05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%); }
.scene-light { position: absolute; left: 0; top: 0; width: 760px; height: 760px; margin: -380px 0 0 -380px;
  border-radius: 50%; opacity: 0; will-change: transform;
  background: radial-gradient(circle, rgba(10,10,10,.045) 0%, rgba(10,10,10,.018) 35%, transparent 68%);
  transition: opacity .6s var(--ease); }
.cursor-on .scene-light { opacity: 1; }

/* ── Cursor (OneScan fx): dot + lerped ring; difference blend so it inverts on the black band ── */
.cursor-dot, .cursor-ring { position: fixed; left: 0; top: 0; z-index: 9999; pointer-events: none;
  border-radius: 50%; opacity: 0; mix-blend-mode: difference; will-change: transform; }
.cursor-dot { width: 6px; height: 6px; margin: -3px 0 0 -3px; background: var(--white); }
.cursor-ring { width: 34px; height: 34px; margin: -17px 0 0 -17px; border: 1px solid var(--white); }
.cursor-ring::after { content: ''; position: absolute; inset: -1px; border-radius: 50%; border: 1px solid var(--white);
  transform: scale(1); transition: transform .35s var(--ease), opacity .35s var(--ease); opacity: 0; }
.cursor-on .cursor-dot, .cursor-on .cursor-ring { opacity: 1; }
.cursor-hover .cursor-ring::after { transform: scale(1.7); opacity: 1; }
.cursor-down .cursor-ring::after { transform: scale(1.3); }
html.has-cursor, html.has-cursor * { cursor: none !important; }

/* ── Buttons (v2 §8): transform + opacity only; glow lives on a pseudo-element ── */
.btn { --tx: 0px; --ty: 0px; --s: 1; position: relative; display: inline-flex; align-items: center; gap: 0;
  padding: 13px 26px; border-radius: var(--radius-btn); font: 600 15px/1.2 var(--font-sans);
  text-decoration: none; cursor: pointer; border: 1px solid transparent; white-space: nowrap;
  transform: translate3d(var(--tx), var(--ty), 0) scale(var(--s));
  transition: transform .45s var(--ease), background-color .2s, border-color .2s, color .2s; }
.btn::after { content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  box-shadow: 0 0 30px rgba(10,10,10,.28); opacity: 0; transition: opacity .35s var(--ease); }
.btn:hover { --s: 1.02; }
.btn:hover::after { opacity: 1; }
.btn:active { --s: .98; }
.btn-primary { background: var(--black); color: var(--white); }
.btn-ghost { background: transparent; color: var(--black); border-color: var(--gray-300); }
.btn-ghost:hover { border-color: var(--black); }
.btn-ghost::after { box-shadow: 0 0 22px rgba(10,10,10,.1); }
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn .arrow { display: inline-block; margin-left: 10px; transition: transform .45s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: currentColor;
  margin-right: 10px; vertical-align: 1px; animation: dotPulse 2.4s ease-in-out infinite; }
@keyframes dotPulse { 0%,100% { opacity: .3; } 50% { opacity: 1; } }

.eyebrow { font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: .18em;
  text-transform: uppercase; color: var(--gray-500); margin-bottom: 22px; }

/* ── Reticles: scanner target corners ── */
.reticle { position: absolute; width: 14px; height: 14px; pointer-events: none; border: 0 solid var(--black); }
.reticle.tl { left: 0; top: 0; border-left-width: 1px; border-top-width: 1px; }
.reticle.tr { right: 0; top: 0; border-right-width: 1px; border-top-width: 1px; }
.reticle.bl { left: 0; bottom: 0; border-left-width: 1px; border-bottom-width: 1px; }
.reticle.br { right: 0; bottom: 0; border-right-width: 1px; border-bottom-width: 1px; }

/* ── 1 · Nav ── */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; height: var(--nav-h); }
.nav::before { content: ''; position: absolute; inset: 0; background: rgba(255,255,255,.74);
  -webkit-backdrop-filter: blur(20px) saturate(1.2); backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--ink-10); opacity: 0; transition: opacity .4s var(--ease); }
.nav.scrolled::before { opacity: 1; }
.nav-inner { position: relative; height: 100%; max-width: 1240px; margin: 0 auto; padding: 0 var(--gutter);
  display: flex; align-items: center; gap: 36px; }
.nav-logo img { height: 26px; width: auto; }
.nav-logo { display: inline-flex; border-radius: 6px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { position: relative; font-size: 14px; font-weight: 500; color: var(--gray-700); text-decoration: none; padding: 6px 0; }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--black);
  transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.nav-links a:hover { color: var(--black); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--black); }
.nav-hud { margin-left: auto; font-size: 11px; letter-spacing: .14em; color: var(--gray-500); white-space: nowrap; }
.nav-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 1px; overflow: hidden; }
.nav-progress i { display: block; height: 100%; background: var(--black); transform: scaleX(0); transform-origin: left; }

/* ── 2 · Hero ── */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 88px; overflow: hidden; }
.nodes-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.hero-grid { width: 100%; display: grid; grid-template-columns: 1.08fr 1fr; gap: 48px; align-items: center; }
.hero-copy { position: relative; z-index: 3; }
.hero-title { font-size: clamp(40px, 5.3vw, 78px); line-height: 1.02; letter-spacing: -0.035em; margin-bottom: 28px; max-width: 15ch; }
.hero-title .w { display: inline-block; opacity: 0; transform: translateY(0.4em); filter: blur(0); }
.hero-title.go .w { animation: wordIn .9s var(--ease) both; animation-delay: calc(var(--i) * 70ms + 150ms); }
@keyframes wordIn { from { opacity: 0; transform: translateY(0.4em); } to { opacity: 1; transform: none; } }
.hero-sub { font-size: clamp(17px, 1.4vw, 19px); color: var(--gray-700); max-width: 540px; margin-bottom: 36px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.hero-meta { font-size: 12px; letter-spacing: .06em; color: var(--gray-500); }
.hero-mark { position: relative; display: flex; flex-direction: column; align-items: center; }
.mark-anchor { position: relative; width: min(100%, 540px); aspect-ratio: 1; }
.mark-static { position: absolute; inset: 7%; width: 86%; height: 86%; opacity: 0; transition: opacity .6s var(--ease); }
.no-nodes .mark-static { opacity: 1; }
.mark-anchor .reticle { width: 22px; height: 22px; opacity: .5; }
.mark-hud { display: flex; gap: 18px; margin-top: 18px; font-size: 10.5px; letter-spacing: .14em; color: var(--gray-500); text-transform: uppercase; }
.mark-hint { margin-top: 8px; font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--gray-300); }
.hint-touch { display: none; }
@media (pointer: coarse) { .hint-fine { display: none; } .hint-touch { display: inline; } }
.no-nodes .mark-hud, .no-nodes .mark-hint { display: none; }
.hero-scan { position: absolute; left: 0; right: 0; top: 0; height: 1px; z-index: 2; pointer-events: none; opacity: 0;
  background: linear-gradient(90deg, transparent, var(--black), transparent);
  animation: heroScan 2.2s .2s var(--ease) 1 both; }
@keyframes heroScan { 0% { transform: translateY(0); opacity: 0; } 15% { opacity: .7; } 85% { opacity: .5; } 100% { transform: translateY(92vh); opacity: 0; } }
.scroll-hint { position: absolute; left: 50%; bottom: 26px; z-index: 3; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px; font-size: 10px; letter-spacing: .24em;
  color: var(--gray-500); text-decoration: none; }
.scroll-hint span { width: 1px; height: 36px; background: var(--ink-10); position: relative; overflow: hidden; }
.scroll-hint span::after { content: ''; position: absolute; left: 0; top: 0; width: 1px; height: 12px; background: var(--black);
  animation: hintDrop 2s var(--ease) infinite; }
@keyframes hintDrop { from { transform: translateY(-12px); } to { transform: translateY(36px); } }

/* ── Sections ── */
.section { position: relative; padding: 140px 0; }
.section-head { max-width: 860px; margin-bottom: 64px; }
.h-xl { font-size: clamp(34px, 4.4vw, 62px); line-height: 1.06; letter-spacing: -0.03em; margin-bottom: 36px; }
.h-lg { font-size: clamp(30px, 3.4vw, 48px); line-height: 1.1; letter-spacing: -0.025em; margin-bottom: 22px; }
.lead { font-size: 19px; color: var(--gray-700); max-width: 680px; }
.center .lead { margin: 0 auto 40px; }

/* Decode: characters resolve out of scanner noise (OneScan fx.scramble) */
[data-decode] .glyph { color: var(--gray-300); }

.punch { margin-top: 44px; font-size: clamp(15px, 1.35vw, 18px); color: var(--black); line-height: 1.5; }
.punch .caret { color: var(--gray-500); margin-right: 8px; }
.punch::after { content: ''; display: inline-block; width: .6em; height: 1.1em; margin-left: 6px; vertical-align: -0.18em;
  background: var(--black); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* 3 · Manifiesto */
.manifesto-body { display: grid; gap: 18px; font-size: clamp(18px, 1.5vw, 21px); line-height: 1.6; max-width: 760px; }

/* 4 · Diagnóstico — scanner readings */
.readings { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.reading { position: relative; padding: 34px 30px 36px; background: rgba(255,255,255,.7); overflow: hidden;
  border: 1px solid var(--ink-10); border-radius: 4px; }
.reading h3 { font-size: 21px; line-height: 1.3; letter-spacing: -0.01em; margin-bottom: 14px; }
.reading > p:last-child { color: var(--gray-700); }
.reading-tag { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 26px; }
.reading-tag::before { content: '■'; margin-right: 8px; color: var(--black); animation: blink 1.4s steps(1) infinite; }
.reading-beam { position: absolute; left: 0; right: 0; top: 0; height: 1px; opacity: 0; pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--black), transparent); }
.reading.in .reading-beam { animation: readBeam 1.4s var(--ease) calc(var(--d, 0ms) + 200ms) 1 both; }
@keyframes readBeam { 0% { transform: translateY(0); opacity: 0; } 20% { opacity: .8; } 100% { transform: translateY(300px); opacity: 0; } }
.closer { margin-top: 56px; font-size: clamp(19px, 1.7vw, 24px); line-height: 1.45; max-width: 820px; font-family: var(--font-display); color: var(--gray-700); }
.closer strong { color: var(--black); font-weight: 500; }

/* 5 · Onefy ONE — las 4 Cs */
.cs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.c-card { --sx: 50%; --sy: 0%; position: relative; padding: 30px 26px 32px; min-height: 360px; display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius-card); overflow: hidden;
  transition: border-color .3s, transform .5s var(--ease); }
.c-card::before { content: ''; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .4s var(--ease);
  background: radial-gradient(360px circle at var(--sx) var(--sy), rgba(10,10,10,.07), transparent 60%); }
.c-card:hover { border-color: var(--black); transform: translateY(-4px); }
.c-card:hover::before { opacity: 1; }
.c-mark { width: 84px; height: 84px; margin-bottom: auto; overflow: visible; }
.c-mark .ring { fill: none; stroke: var(--ink-10); stroke-width: .045; }
.c-mark .spine { fill: none; stroke: var(--black); stroke-width: .05; stroke-linecap: round; }
.c-mark .hub { fill: var(--white); stroke: var(--black); stroke-width: .05; }
.c-mark .hub.on { fill: var(--black); }
.c-mark .halo { fill: none; stroke: var(--black); stroke-width: .02; opacity: 0; transform-box: fill-box; transform-origin: center; }
.c-card.in .c-mark .halo { animation: halo 2.6s var(--ease) calc(var(--d, 0ms) + 400ms) infinite; }
@keyframes halo { 0% { opacity: .7; transform: scale(1); } 70%, 100% { opacity: 0; transform: scale(2.4); } }
.c-num { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--gray-500); margin: 36px 0 10px; }
.c-card h3 { font-size: 30px; letter-spacing: -0.02em; margin-bottom: 12px; }
.c-card p:last-child { font-size: 15px; color: var(--gray-700); min-height: 6.6em; }
.punch-center { margin-top: 48px; text-align: center; font-family: var(--font-display); font-size: clamp(20px, 2vw, 28px); color: var(--gray-700); }
.punch-center strong { color: var(--black); font-weight: 600; }

/* 6 · Método — ladder */
.ladder { position: relative; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ladder-track { position: absolute; left: 0; right: 0; top: 29px; height: 1px; background: var(--ink-10); }
.ladder-track i { display: block; height: 100%; background: var(--black); transform: scaleX(0); transform-origin: left; }
.rung { position: relative; padding-right: 12px; }
.rung-glyph { position: relative; display: inline-grid; place-items: center; width: 58px; height: 58px; border-radius: 50%;
  background: var(--white); border: 1px solid var(--ink-10); font-size: 26px; color: var(--black); margin-bottom: 30px; line-height: 1; }
.rung-step { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--gray-500); margin-bottom: 10px; }
.rung h3 { font-size: 26px; letter-spacing: -0.015em; margin-bottom: 12px; }
.rung > p:not(.rung-step) { max-width: 340px; }
.rung-link { display: inline-flex; gap: 8px; margin-top: 18px; font-weight: 600; font-size: 15px; color: var(--black);
  text-decoration: none; border-bottom: 1px solid var(--black); padding-bottom: 2px; }
.rung-link span { display: inline-block; transition: transform .45s var(--ease); }
.rung-link:hover span { transform: translateX(4px); }

/* 7 · Cómo funciona */
.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.steps { list-style: none; padding: 0; margin: 28px 0 32px; border-top: 1px solid var(--gray-300); }
.steps li { display: flex; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--gray-300); }
.steps li > span { font-size: 12px; color: var(--gray-500); padding-top: 3px; }
.steps strong { display: block; font-family: var(--font-display); font-weight: 600; font-size: 18px; color: var(--black); margin-bottom: 4px; }
.steps p { font-size: 15px; }
.dry { font-family: var(--font-display); font-size: 19px; color: var(--black); margin-bottom: 30px; max-width: 480px; }

/* the OneScan preview panel — OneScan's dark scan mode, shown as a product surface */
.sim { position: relative; min-height: 540px; border-radius: 18px; background: var(--pure-black); color: rgba(255,255,255,.72);
  padding: 30px; overflow: hidden; }
.sim .reticle { border-color: rgba(255,255,255,.45); margin: 14px; }
.sim-grid { position: absolute; inset: -50% 0 0 0; opacity: .3; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.14) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(circle at 50% 60%, #000 0%, transparent 70%); mask-image: radial-gradient(circle at 50% 60%, #000 0%, transparent 70%);
  animation: simGrid 6s linear infinite; }
@keyframes simGrid { from { transform: translateY(0); } to { transform: translateY(40px); } }
.sim-beam { position: absolute; left: 0; right: 0; top: 0; height: 2px; opacity: .7; pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--white), transparent); box-shadow: 0 0 18px 2px rgba(255,255,255,.45);
  animation: simBeam 3.2s cubic-bezier(.5,0,.5,1) infinite; }
@keyframes simBeam { 0%,100% { transform: translateY(40px); } 50% { transform: translateY(500px); } }
.sim-hud { position: relative; display: flex; justify-content: space-between; font-size: 11px; letter-spacing: .14em; color: rgba(255,255,255,.5); margin: 8px 6px 10px; }
.sim-bar { position: relative; display: grid; grid-template-columns: repeat(10, 1fr); gap: 4px; margin: 0 6px 40px; }
.sim-bar i { height: 2px; background: rgba(255,255,255,.14); transition: background-color .3s; }
.sim-bar i.on { background: var(--white); }
.sim-body, .sim-result { position: relative; margin: 0 6px; transition: opacity .4s var(--ease), transform .5s var(--ease); }
.sim-q { font-family: var(--font-display); font-size: 24px; line-height: 1.25; color: var(--white); margin-bottom: 26px; min-height: 60px; }
.sim-opts { display: grid; gap: 10px; }
.sim-opt { display: flex; align-items: center; gap: 12px; padding: 13px 15px; border-radius: 11px; font-size: 15px;
  border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.03); color: rgba(255,255,255,.86);
  opacity: 0; transform: translateY(8px); transition: opacity .4s var(--ease), transform .5s var(--ease), background-color .2s, color .2s, border-color .2s; }
.sim-opt.show { opacity: 1; transform: none; }
.sim-opt b { flex-shrink: 0; width: 24px; height: 24px; display: inline-grid; place-items: center; border-radius: 6px; font: 500 11px var(--font-mono);
  border: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.55); }
.sim-opt.sel { background: var(--white); color: var(--pure-black); border-color: var(--white); }
.sim-opt.sel b { border-color: rgba(0,0,0,.3); color: var(--pure-black); }
.sim-result { position: absolute; left: 30px; right: 30px; top: 150px; opacity: 0; transform: translateY(12px); pointer-events: none; text-align: center; }
.sim.done .sim-body { opacity: 0; transform: translateY(-12px); }
.sim.done .sim-result { opacity: 1; transform: none; }
.sim-label { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,.5); }
.sim-score { font-size: 104px; font-weight: 700; color: var(--white); line-height: 1; margin: 18px 0 22px; }
.sim-score small { font-size: 22px; color: rgba(255,255,255,.4); font-weight: 400; margin-left: 6px; }
.sim-meter { height: 2px; background: rgba(255,255,255,.14); margin: 0 auto 22px; max-width: 320px; overflow: hidden; }
.sim-meter i { display: block; height: 100%; background: var(--white); transform: scaleX(0); transform-origin: left;
  box-shadow: 0 0 10px rgba(255,255,255,.6); transition: transform 1.4s var(--ease); }
.sim-note { font-size: 11px; color: rgba(255,255,255,.4); letter-spacing: .04em; }

/* 8 · Por qué */
.why-body { font-size: clamp(18px, 1.5vw, 21px); line-height: 1.6; max-width: 760px; }

/* 9 · Qué te llevas */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--black); }
.stat { padding: 30px 26px 10px 0; }
.stat + .stat { padding-left: 26px; border-left: 1px solid var(--ink-10); }
.stat-num { font-size: clamp(56px, 6vw, 88px); font-weight: 700; color: var(--black); line-height: 1; letter-spacing: -0.04em; margin-bottom: 18px; }
.stat-label { font-size: 15px; }

/* 10 · FAQ */
.faq-list { border-top: 1px solid var(--gray-300); }
.faq-list details { border-bottom: 1px solid var(--gray-300); }
.faq-list summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 26px 0; font-family: var(--font-display); font-size: clamp(19px, 1.7vw, 23px); color: var(--black); font-weight: 500; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { position: relative; flex-shrink: 0; width: 16px; height: 16px; }
.faq-list summary i::before, .faq-list summary i::after { content: ''; position: absolute; left: 0; top: 7.5px; width: 16px; height: 1px; background: var(--black);
  transition: transform .45s var(--ease); }
.faq-list summary i::after { transform: rotate(90deg); }
.faq-list details[open] summary i::after { transform: rotate(0deg); }
.faq-list summary:hover i::before { transform: scaleX(1.25); }
.faq-list details p { padding: 0 48px 28px 0; font-size: 17px; max-width: 720px; animation: faqIn .5s var(--ease); }
@keyframes faqIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* 11 · Promise band — the one black band */
.promise { position: relative; z-index: 2; background: var(--pure-black); min-height: 78vh; display: grid; place-items: center; overflow: hidden; padding: 120px var(--gutter); }
.promise::after { content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at 50% 50%, rgba(255,255,255,.07), transparent 60%); }
.promise .nodes-canvas { opacity: .5; }
.promise-anchor { position: absolute; left: 50%; top: 50%; width: min(64vh, 80vw); height: min(64vh, 80vw); transform: translate(-50%, -50%); pointer-events: none; }
.promise-line { position: relative; z-index: 3; font-family: var(--font-display); font-weight: 500; color: var(--white); text-align: center;
  font-size: clamp(40px, 7.4vw, 116px); line-height: 1; letter-spacing: -0.045em; text-shadow: 0 0 40px rgba(255,255,255,.25); }
.promise-line .glyph { color: rgba(255,255,255,.35); }

.final { padding: 150px 0 160px; }
.final .h-lg { margin-bottom: 18px; }

.footer { position: relative; z-index: 2; border-top: 1px solid var(--ink-10); padding: 34px 0; background: var(--white); }
.footer-inner { display: flex; align-items: center; gap: 36px; flex-wrap: wrap; }
.footer img { height: 24px; width: auto; }
.footer nav { display: flex; gap: 22px; }
.footer nav a { font-size: 14px; text-decoration: none; color: var(--gray-700); }
.footer nav a:hover { color: var(--black); text-decoration: underline; text-underline-offset: 4px; }
.footer p { margin-left: auto; font-size: 12px; color: var(--gray-500); letter-spacing: .04em; }

/* ── Reveal on scroll ── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform 1s var(--ease); transition-delay: var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; }
.c-card.reveal.in:hover { transform: translateY(-4px); }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .nav-hud { display: none; }
  .nav .btn { margin-left: auto; }
  .cs { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--ink-10); }
  .how-grid { gap: 48px; }
}
@media (max-width: 900px) {
  :root { --gutter: 20px; }
  .nav-links { display: none; }
  .hero { padding-top: calc(var(--nav-h) + 12px); align-items: flex-start; }
  .hero-grid { grid-template-columns: 1fr; gap: 8px; }
  .hero-mark { order: -1; }
  .mark-anchor { width: min(64vw, 300px); }
  .mark-hud { gap: 12px; font-size: 9.5px; }
  .hero-title { max-width: none; }
  .scroll-hint { display: none; }
  .section { padding: 96px 0; }
  .section-head { margin-bottom: 44px; }
  .readings { grid-template-columns: 1fr; }
  .ladder { grid-template-columns: 1fr; gap: 40px; padding-left: 82px; }
  .ladder-track { left: 29px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .ladder-track i { width: 100%; height: 100%; transform: scaleY(0); transform-origin: top; }
  .rung-glyph { position: absolute; left: -82px; top: -6px; margin: 0; }
  .how-grid { grid-template-columns: 1fr; }
  .sim { min-height: 500px; }
}
@media (max-width: 600px) {
  :root { --gutter: 16px; }
  .cs { grid-template-columns: 1fr; }
  .c-card { min-height: 0; }
  .c-mark { margin-bottom: 8px; }
  .stats { grid-template-columns: 1fr; }
  .stat, .stat + .stat { padding-left: 0; border-left: 0; }
  .stat + .stat { border-top: 1px solid var(--ink-10); }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .footer p { margin-left: 0; }
  .sim { padding: 22px; }
  .sim-q { font-size: 20px; }
  .sim-result { left: 22px; right: 22px; }
  .faq-list details p { padding-right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .hero-title .w { opacity: 1; transform: none; }
  .hero-scan, .sim-beam { display: none; }
}