/* Allibiya v2 — product-launch language: one headline, one object, a lot of air.
   Layout: centred hero over a fixed 3D stage; sticky scroll chapters; one black chapter; bento + numbers. */
:root {
  --bg: #fbfbfd;
  --tint: #f5f5f7;
  --ink: #1d1d1f;
  --mute: #6e6e73;
  --line: #d2d2d7;
  --blue: #0066cc;
  --cta: #0071e3;
  --wa: #25a244;
  --night: #000000;
  --night-ink: #f5f5f7;
  --night-mute: #86868b;
  --ice: #64c8f0;

  --f: "Readex Pro", "Segoe UI", Tahoma, sans-serif;
  --t-display: clamp(3rem, 1.4rem + 6.4vw, 7.6rem);
  --t-h2: clamp(2.3rem, 1.3rem + 3.8vw, 5rem);
  --t-h3: clamp(1.5rem, 1.15rem + 1.2vw, 2.25rem);
  --t-lead: clamp(1.12rem, 0.98rem + 0.55vw, 1.6rem);
  --t-body: 1.0625rem;
  --t-small: 0.8125rem;

  --gut-l: max(22px, env(safe-area-inset-left, 0px));
  --gut-r: max(22px, env(safe-area-inset-right, 0px));
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { overflow-x: clip; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--f); font-size: var(--t-body); line-height: 1.6; overflow-x: clip; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 600; text-wrap: balance; }
:focus-visible { outline: 2px solid var(--cta); outline-offset: 3px; border-radius: 6px; }
.ltr { direction: ltr; unicode-bidi: isolate; display: inline-block; }
.wrap { max-width: 1180px; margin-inline: auto; padding-left: var(--gut-l); padding-right: var(--gut-r); }

/* fixed 3D stage sits behind transparent sections; opaque sections hide it */
#scene { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; display: block; }
main { position: relative; }

/* ---------- nav: thin translucent bar ---------- */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--bg); }
.nav {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; height: 52px;
  background: rgba(251, 251, 253, 0.78); backdrop-filter: saturate(180%) blur(18px); -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}
.nav .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.brand img { width: 34px; height: auto; }
.nav-links { display: flex; gap: 2rem; font-size: var(--t-small); }
.nav-links a { text-decoration: none; color: rgba(29, 29, 31, 0.8); transition: color 0.2s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav .nav-cta { font-size: 0.78rem; padding: 0.35rem 0.9rem; }
.menu-btn { display: none; width: 40px; height: 40px; border: 0; background: transparent; cursor: pointer; position: relative; }
.menu-btn i { position: absolute; left: 11px; right: 11px; height: 1.5px; background: var(--ink); transition: transform 0.4s var(--ease-out), top 0.4s var(--ease-out); }
.menu-btn i:first-child { top: 16px; } .menu-btn i:last-child { top: 23px; }
.menu-btn[aria-expanded="true"] i:first-child { top: 19.5px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] i:last-child { top: 19.5px; transform: rotate(-45deg); }
.menu { position: fixed; inset: 52px 0 0; z-index: 19; background: var(--bg); padding: 1.5rem var(--gut-r) 2rem var(--gut-l); display: grid; align-content: start; gap: 0.2rem; opacity: 0; transform: translateY(-8px); transition: opacity 0.35s var(--ease), transform 0.35s var(--ease-out); }
.menu.open { opacity: 1; transform: none; }
.menu a { font-size: 1.75rem; font-weight: 600; text-decoration: none; padding-block: 0.55rem; border-bottom: 1px solid var(--line); }
.menu a[aria-current="page"] { color: var(--blue); }
html.menu-open, html.menu-open body { overflow: hidden; }

/* ---------- type + links ---------- */
.eyebrow { font-size: var(--t-lead); font-weight: 500; color: var(--mute); }
.display { font-size: var(--t-display); font-weight: 700; line-height: 1.12; letter-spacing: -0.01em; }
.h2 { font-size: var(--t-h2); font-weight: 700; line-height: 1.18; }
.h3 { font-size: var(--t-h3); font-weight: 600; line-height: 1.3; }
.lead { font-size: var(--t-lead); color: var(--mute); line-height: 1.55; max-width: 34ch; }
.center { text-align: center; margin-inline: auto; }
.links { display: flex; flex-wrap: wrap; gap: 1.2rem 2rem; align-items: center; }
.center.links, .links.center { justify-content: center; }
.link { color: var(--blue); text-decoration: none; font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.3rem); }
.link::after { content: " ‹"; }
.link:hover { text-decoration: underline; }
.pill {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  background: var(--cta); color: #fff; text-decoration: none; border: 0; cursor: pointer;
  font-family: var(--f); font-size: 1.0625rem; padding: 0.8rem 1.6rem; border-radius: 999px;
  transition: background 0.2s, transform 0.2s var(--ease-out);
}
.pill:hover { background: #0077ed; }
.pill:active { transform: scale(0.97); }
.pill.wa { background: var(--wa); }
.pill.wa:hover { background: #2bb64d; }
.pill.ghost { background: transparent; color: var(--blue); box-shadow: inset 0 0 0 1px var(--blue); }
.pill svg { width: 20px; height: 20px; fill: currentColor; }

/* ---------- reveal ---------- */
.js .rv { opacity: 0; transform: translateY(32px); transition: opacity 1s var(--ease), transform 1.2s var(--ease-out); transition-delay: var(--d, 0s); }
.js .rv.in { opacity: 1; transform: none; }

/* ---------- sections ---------- */
.sec { position: relative; padding-block: clamp(5rem, 3rem + 8vw, 10rem); }
.sec-tint { background: var(--tint); }
.sec-night { background: var(--night); color: var(--night-ink); }
.sec-night .lead, .sec-night .eyebrow { color: var(--night-mute); }

/* hero: words up top, the cylinder rises from below */
.hero { min-height: 100vh; min-height: 100svh; padding-top: clamp(4.5rem, 3rem + 6vw, 8rem); display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1.4rem; }
.hero .lead { margin-inline: auto; max-width: 40ch; }
.rise-track { height: 160vh; }

/* sticky chapter */
.track { position: relative; }
.stage { position: sticky; top: 52px; height: calc(100vh - 52px); height: calc(100svh - 52px); overflow: hidden; }

/* exploded view */
.explode-track { height: 320vh; }
.explode-head { position: absolute; inset: clamp(2rem, 1rem + 4vh, 4rem) 0 auto; text-align: center; padding-inline: var(--gut-l) var(--gut-r); display: grid; gap: 0.8rem; justify-items: center; }
.callouts { position: absolute; inset: 0; pointer-events: none; }
.callouts svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.callouts line { stroke: var(--ink); stroke-width: 1; opacity: 0.35; }
.callouts circle { fill: var(--ink); }
.callout { position: absolute; width: min(280px, 34vw); opacity: 0; transform: translateY(10px); transition: opacity 0.6s var(--ease), transform 0.8s var(--ease-out); }
.callout.on { opacity: 1; transform: none; }
.callout b { display: block; font-size: 1.15rem; font-weight: 600; }
.callout span { color: var(--mute); font-size: 0.98rem; line-height: 1.5; }

/* night chapter */
.cold-track { height: 240vh; }
.cold .stage { display: grid; place-items: center; text-align: center; }
#vapor { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.cold-copy { position: relative; display: grid; gap: 1.2rem; justify-items: center; padding-inline: var(--gut-l) var(--gut-r); }
.cold-num { font-size: clamp(6rem, 2rem + 17vw, 19rem); font-weight: 700; line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; direction: ltr;
  background: linear-gradient(180deg, #ffffff 20%, #9fdcf5 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cold-copy .lead { max-width: 30ch; color: #c7d3db; }
.cold-copy small { color: var(--night-mute); font-size: var(--t-small); letter-spacing: 0.08em; }

/* picker */
.picker { min-height: 100vh; min-height: 100svh; display: flex; align-items: center; }
.picker .wrap { width: 100%; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2rem; align-items: center; }
.pick-copy { display: grid; gap: 1.1rem; min-width: 0; }
.pick-name { font-size: clamp(3rem, 1.6rem + 5vw, 6.5rem); font-weight: 700; line-height: 1.1; transition: opacity 0.3s; }
.pick-name.swap { opacity: 0; }
.spec { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin: 0.6rem 0 0; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.spec div { min-width: 0; }
.spec dt { color: var(--mute); font-size: var(--t-small); }
.spec dd { margin: 0.2rem 0 0; font-weight: 600; font-size: 1.05rem; font-variant-numeric: tabular-nums; }
.swatches { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 0.8rem; }
.sw { width: 34px; height: 34px; border-radius: 50%; border: 0; cursor: pointer; background: var(--c); position: relative; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.15); transition: transform 0.2s var(--ease-out); }
.sw::after { content: ""; position: absolute; inset: -5px; border-radius: 50%; box-shadow: 0 0 0 2px var(--cta); opacity: 0; transition: opacity 0.2s; }
.sw[aria-pressed="true"]::after { opacity: 1; }
.sw:hover { transform: scale(1.08); }
.sw-label { color: var(--mute); font-size: var(--t-small); min-height: 1.4em; }

/* numbers */
.nums { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2rem; margin-top: clamp(2.5rem, 2rem + 3vw, 5rem); }
.num { display: grid; gap: 0.4rem; min-width: 0; }
.num b { font-size: clamp(2.8rem, 1.8rem + 3vw, 5rem); font-weight: 700; line-height: 1.05; direction: ltr; text-align: right; font-variant-numeric: tabular-nums;
  background: linear-gradient(90deg, #0a5fb4, #2bb3e8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.num span { color: var(--mute); font-size: 1rem; }

/* full-bleed moment */
.moment { position: relative; min-height: 92vh; display: flex; align-items: flex-end; color: #fff; overflow: hidden; isolation: isolate; }
.moment img { position: absolute; inset: 0; width: 100%; height: 115%; object-fit: cover; z-index: -2; will-change: transform; }
.moment::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0.25) 55%, rgba(0, 0, 0, 0.05) 100%); }
.moment .wrap { width: 100%; padding-bottom: clamp(3rem, 2rem + 5vw, 7rem); }
.moment .h2 { max-width: 16ch; }

/* bento */
.bento { display: grid; grid-template-columns: 1.3fr 1fr; grid-template-rows: auto auto; gap: 1.2rem; margin-top: clamp(2.5rem, 2rem + 3vw, 4.5rem); }
.tile { position: relative; overflow: hidden; border-radius: 28px; background: var(--tint); min-height: 340px; display: flex; flex-direction: column; justify-content: flex-end; padding: 2rem; isolation: isolate; text-decoration: none; }
.tile:first-child { grid-row: span 2; min-height: 700px; }
.tile img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 1.4s var(--ease-out); }
.tile::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0) 60%); }
.tile:hover img { transform: scale(1.04); }
.tile .h3 { color: #fff; }
.tile p { color: rgba(255, 255, 255, 0.82); margin-top: 0.3rem; max-width: 36ch; }
.tile .chips { display: flex; gap: 0.4rem; margin-top: 0.9rem; direction: ltr; justify-content: flex-end; }
.tile .chips span { color: #fff; font-size: 0.85rem; padding: 0.15rem 0.7rem; border-radius: 999px; background: rgba(255, 255, 255, 0.18); }

/* closing call */
.call { text-align: center; display: grid; justify-items: center; gap: 1.4rem; }
.phones { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 2.2rem; margin-top: 0.6rem; color: var(--mute); }
.phones b { color: var(--ink); font-weight: 600; direction: ltr; unicode-bidi: isolate; }

/* footer */
.foot { background: var(--tint); color: var(--mute); font-size: 0.75rem; padding-block: 2.4rem calc(2.4rem + env(safe-area-inset-bottom, 0px)); }
.foot .wrap { display: grid; gap: 1rem; }
.foot nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; }
.foot a { text-decoration: none; color: var(--ink); opacity: 0.8; }
.foot .row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem; padding-top: 1rem; border-top: 1px solid var(--line); }

/* ---------- split headings: words rise out of a line mask ---------- */
.js .split { visibility: hidden; }
.js .split.ready { visibility: visible; }
.split .ln { padding-block: 0.06em; margin-block: -0.06em; }

/* ---------- page transition curtain: covers on leave, lifts off on enter ---------- */
.curtain {
  position: fixed; inset: 0; z-index: 40; pointer-events: none;
  background: radial-gradient(120% 90% at 50% 110%, #1b6c9c 0%, #07253d 45%, #02080f 100%);
  display: grid; place-items: center; transform: translateY(101%);
}
.curtain p { color: #fff; font-size: var(--t-h2); font-weight: 700; opacity: 0; transform: translateY(24px); }
html.is-changing .curtain { transition: transform 0.75s cubic-bezier(0.76, 0, 0.24, 1); }
html.is-changing .curtain p { transition: opacity 0.5s 0.25s var(--ease), transform 0.8s 0.2s var(--ease-out); }
html.is-leaving .curtain { transform: none; }
html.is-leaving .curtain p { opacity: 1; transform: none; }
html.is-rendering .curtain { transform: translateY(-101%); }
html.is-rendering .curtain p { opacity: 0; transform: translateY(-40px); transition-delay: 0s; }
html.is-changing { cursor: progress; }

/* ---------- inner-page hero ---------- */
.page-hero { min-height: 88vh; min-height: 88svh; display: flex; flex-direction: column; justify-content: center; }
.page-hero > .wrap { width: 100%; }
.center-col { display: grid; justify-items: center; text-align: center; gap: 1.4rem; }

/* air mix bar */
.mix { width: min(720px, 100%); margin-top: 2rem; display: grid; gap: 0.9rem; }
.mix-bar { display: flex; height: 14px; border-radius: 99px; overflow: hidden; background: var(--line); direction: ltr; }
.mix-bar i { width: var(--w); min-width: 3px; background: var(--c); transform-origin: left; }
.mix-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.8rem; color: var(--mute); font-size: 0.95rem; }
.mix-legend b { color: var(--ink); font-weight: 600; direction: ltr; unicode-bidi: isolate; }

/* process steps: one sticky stage, copy changes with scroll, lab column on the left */
.steps-track { height: 650vh; }
.steps-grid { height: 100%; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; }
.steps { position: relative; min-height: 22rem; }
.step { position: absolute; inset: 0 0 auto; display: grid; gap: 1rem; opacity: 0; transform: translateY(40px); transition: opacity 0.6s var(--ease), transform 0.9s var(--ease-out); pointer-events: none; }
.step.on { opacity: 1; transform: none; pointer-events: auto; }
.step.past { transform: translateY(-40px); }
.step-no { color: var(--blue); font-weight: 600; font-size: var(--t-small); letter-spacing: 0.04em; }
.readout { position: absolute; inset: auto var(--gut-r) clamp(1.5rem, 4vh, 3rem) auto; display: grid; gap: 0.6rem; justify-items: end; }
.readout b { font-size: clamp(2.6rem, 1.6rem + 3vw, 4.5rem); font-weight: 700; line-height: 1; direction: ltr; font-variant-numeric: tabular-nums; }
.readout .rail { width: 180px; height: 3px; background: var(--line); border-radius: 3px; overflow: hidden; direction: ltr; }
.readout .rail i { display: block; height: 100%; background: var(--cta); transform-origin: left; transform: scaleX(0); }

.nums-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.num b.ice { background: linear-gradient(90deg, #ffffff, #8fd8f7); -webkit-background-clip: text; background-clip: text; }
.sec-night .num span { color: var(--night-mute); }

/* gases: the cylinder stays, each gas is a screen of copy */
.gas { min-height: 100vh; min-height: 100svh; display: flex; align-items: center; }
.gas .wrap { width: 100%; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.gas .pick-copy { opacity: 0.18; transform: translateY(30px); transition: opacity 0.7s var(--ease), transform 1s var(--ease-out); }
.gas.on .pick-copy { opacity: 1; transform: none; }
.gas-sym { font-size: var(--t-small); font-weight: 600; letter-spacing: 0.08em; color: var(--blue); direction: ltr; text-align: right; }
.dot { display: inline-block; width: 0.8em; height: 0.8em; border-radius: 50%; background: var(--c); box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.18); margin-inline-end: 0.4em; vertical-align: -0.05em; }
.services { list-style: none; padding: 0; margin: clamp(2.5rem, 2rem + 3vw, 4.5rem) 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 2.4rem 2rem; counter-reset: s; }
.services li { display: grid; gap: 0.4rem; padding-top: 1.2rem; border-top: 1px solid var(--line); counter-increment: s; }
.services li::before { content: "0" counter(s); color: var(--blue); font-size: var(--t-small); font-weight: 600; }
.services b { font-size: 1.25rem; font-weight: 600; }
.services span { color: var(--mute); }

/* sectors: three photo layers drift at different speeds behind the headline */
.layers-hero { position: relative; min-height: 120vh; overflow: hidden; display: grid; place-items: center; isolation: isolate; }
.layer { position: absolute; border-radius: 26px; overflow: hidden; box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.35); z-index: -1; will-change: transform; }
.layer img { width: 100%; height: 100%; object-fit: cover; }
.l1 { width: 30vw; aspect-ratio: 4 / 5; top: 8%; right: -4vw; }
.l2 { width: 24vw; aspect-ratio: 1; bottom: 6%; left: 4vw; }
.l3 { width: 18vw; aspect-ratio: 3 / 4; top: 14%; left: 14vw; }
.layers-copy { padding: 2.2rem; border-radius: 32px; background: rgba(251, 251, 253, 0.72); backdrop-filter: blur(22px) saturate(160%); -webkit-backdrop-filter: blur(22px) saturate(160%); max-width: 860px; }
.h-track { height: 340vh; }
.h-track .stage { display: flex; align-items: center; }
.h-rail { display: flex; gap: 2vw; padding-inline: 6vw; will-change: transform; }
.h-card { position: relative; flex: 0 0 min(78vw, 1100px); height: min(72vh, 680px); border-radius: 32px; overflow: hidden; display: flex; align-items: flex-end; color: #fff; isolation: isolate; }
.h-card img { position: absolute; inset: 0; width: 120%; max-width: none; height: 100%; object-fit: cover; z-index: -2; }
.h-card::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0) 62%); }
.h-body { padding: clamp(1.6rem, 1rem + 2.5vw, 3.2rem); display: grid; gap: 0.7rem; max-width: 46ch; }
.h-body .gas-sym { color: #9fdcf5; }
.h-body p:last-child { color: rgba(255, 255, 255, 0.85); }

/* contact: the coast draws itself, pins drop in */
.coast { position: relative; margin: clamp(2rem, 1rem + 4vw, 4rem) 0 0; aspect-ratio: 1000 / 260; }
.coast svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.coast-line { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; }
.pin { position: absolute; left: var(--x); top: var(--y); display: grid; justify-items: center; transform: translate(-50%, -50%); direction: rtl; }
.pin i { width: 14px; height: 14px; border-radius: 50%; background: var(--cta); box-shadow: 0 0 0 6px rgba(0, 113, 227, 0.16); }
.pin b { position: absolute; white-space: nowrap; font-weight: 600; font-size: 0.95rem; text-align: center; line-height: 1.3; }
.pin b small { display: block; font-weight: 400; color: var(--mute); font-size: 0.75rem; }
.pin[data-side="up"] b { bottom: 22px; }
.pin[data-side="down"] b { top: 22px; }
.sea { position: absolute; left: 50%; top: 2%; transform: translateX(-50%); color: var(--mute); font-size: var(--t-small); letter-spacing: 0.3em; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 3rem; align-items: start; }
.contact-copy { display: grid; gap: 1.3rem; }
.lines { margin: 0; display: grid; }
.line { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding-block: 1.2rem; border-bottom: 1px solid var(--line); }
.line dt { color: var(--mute); font-size: var(--t-small); }
.line dd { margin: 0.2rem 0 0; font-size: clamp(1.2rem, 1rem + 0.8vw, 1.6rem); font-weight: 600; }
.copy { font-family: var(--f); font-size: 0.85rem; border: 0; background: #fff; color: var(--blue); border-radius: 99px; padding: 0.45rem 1rem; cursor: pointer; box-shadow: inset 0 0 0 1px var(--line); }
.copy:hover { box-shadow: inset 0 0 0 1px var(--blue); }
.branches { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1.5rem; }
.branches li { display: grid; gap: 0.3rem; padding-top: 1.2rem; border-top: 2px solid var(--ink); }
.branches b { font-size: 1.3rem; }
.branches span { color: var(--mute); }

/* ---------- phones ---------- */
@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .menu-btn { display: block; }
  .picker .wrap { grid-template-columns: minmax(0, 1fr); }
  .picker { align-items: flex-end; padding-top: 52vh; }
  .pick-copy { background: rgba(251, 251, 253, 0.92); border-radius: 22px; padding: 1.4rem; }
  .nums { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bento { grid-template-columns: minmax(0, 1fr); }
  .tile:first-child { grid-row: auto; min-height: 460px; }
  /* phones: callouts become a list under the cylinder, no tracking lines */
  .callouts { inset: auto 0 0; padding: 0 var(--gut-r) 1.4rem var(--gut-l); display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem 1rem; }
  .callouts svg { display: none; }
  .callout { position: static; width: auto; }
  .callout b { font-size: 0.98rem; }
  .callout span { font-size: 0.82rem; }
}
@media (max-width: 860px) {
  .steps-grid { grid-template-columns: minmax(0, 1fr); align-items: end; padding-bottom: 7rem; }
  .steps { min-height: 15rem; background: rgba(251, 251, 253, 0.9); border-radius: 22px; }
  .step { padding: 1.3rem; }
  .step .h2 { font-size: 2rem; }
  .step .lead { font-size: 1.02rem; }
  .readout { inset: 1.2rem var(--gut-r) auto auto; }
  .readout b { font-size: 2.2rem; }
  .readout .rail { width: 110px; }
  .nums-3 { grid-template-columns: minmax(0, 1fr); }
  .gas { align-items: flex-end; padding-bottom: 8vh; }
  .gas .wrap { grid-template-columns: minmax(0, 1fr); }
  .gas .pick-name { font-size: 2.6rem; }
  .l1 { width: 52vw; right: -12vw; top: 4%; }
  .l2 { width: 44vw; left: -6vw; bottom: 4%; }
  .l3 { width: 34vw; left: 4vw; top: 10%; }
  .layers-copy { padding: 1.4rem; margin-inline: var(--gut-l) var(--gut-r); }
  .h-track { height: auto; }
  .h-track .stage { position: static; height: auto; display: block; padding-block: 3rem; }
  .h-rail { display: grid; gap: 1rem; padding-inline: var(--gut-l) var(--gut-r); transform: none !important; }
  .h-card { height: 520px; flex: none; }
  .h-card img { width: 100%; }
  .pin b { font-size: 0.72rem; }
  .pin b small { display: none; }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .branches { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 520px) {
  .callout span { display: none; }
  .spec { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .split { visibility: visible !important; }
  .step, .gas .pick-copy { transition: none; }
  .js .rv { opacity: 1; transform: none; transition: none; }
  .callout { transition: none; }
}