/* Agentis Air, "Daylight" system.
   Colour carries meaning: amber = what is in the air, cyan = charged and captured, clear = clean. */

:root {
  --air-0: #F5F8F9;
  --air-1: #ECF2F4;
  --air-2: #DFE9EC;
  --paper: #FBFCFB;
  --ink: #0A2830;
  --ink-2: #385560;
  --ink-3: #567079;
  --deep: #06222B;
  --deep-2: #0B303B;
  --teal: #007297;
  --teal-ink: #005F80;
  --cyan: #00A6CE;
  --cyan-soft: #7DD3E8;
  --amber: #C98A2B;
  --amber-ink: #8A5A12;
  --good: #2FB574;
  --line: rgba(10, 40, 48, .12);
  --line-2: rgba(10, 40, 48, .2);
  --line-inv: rgba(240, 250, 252, .16);

  --ff: "Amulya", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  --fs-d1: clamp(3.1rem, 6.3vw, 6.6rem);
  --fs-d2: clamp(2.3rem, 4.3vw, 4.25rem);
  --fs-d3: clamp(1.7rem, 2.6vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 1.5vw, 1.5rem);
  --fs-lead: clamp(1.125rem, 1.35vw, 1.3125rem);
  --fs-body: 1.0625rem;
  --fs-sm: .9375rem;
  --fs-xs: .8125rem;
  --fs-label: .75rem;

  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px;
  --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px; --s-11: 176px;
  --pad: clamp(20px, 4.4vw, 72px);
  --max: 1360px;
  --nav-h: 76px;

  --r-chip: 999px; --r-sm: 10px; --r-md: 18px; --r-lg: 28px;

  /* Two-mode easing. Entrances decelerate, exits accelerate, never the same curve for both. */
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-in: cubic-bezier(.5, 0, .9, .4);
  --ease-ui: cubic-bezier(.2, 0, .38, .9);
  --ease-move: cubic-bezier(.4, .14, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 16px); }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }
body {
  margin: 0; background: var(--air-0); color: var(--ink);
  font-family: var(--ff); font-size: var(--fs-body); line-height: 1.6; font-weight: 400;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; overflow-x: clip;
}
img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--cyan); color: #fff; }

.wrap { width: 100%; max-width: calc(var(--max) + var(--pad) * 2); margin-inline: auto; padding-inline: var(--pad); }
.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(16px, 2vw, 32px); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: fixed; left: 16px; top: -80px; z-index: 1000; background: var(--ink); color: #fff; padding: 12px 18px; border-radius: var(--r-chip); transition: top .2s var(--ease-ui); }
.skip:focus { top: 12px; }

/* ---------- type ---------- */
.d1 { font-size: var(--fs-d1); line-height: .98; letter-spacing: -.038em; font-weight: 300; }
.d2 { font-size: var(--fs-d2); line-height: 1.03; letter-spacing: -.032em; font-weight: 300; text-wrap: balance; }
.d3 { font-size: var(--fs-d3); line-height: 1.12; letter-spacing: -.024em; font-weight: 300; text-wrap: balance; }
.h3 { font-size: var(--fs-h3); line-height: 1.25; letter-spacing: -.012em; font-weight: 500; }
.lead { font-size: var(--fs-lead); line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
.body { color: var(--ink-2); max-width: 62ch; text-wrap: pretty; }
.body + .body { margin-top: 1em; }
.label { font-size: var(--fs-label); line-height: 1.2; letter-spacing: .14em; text-transform: uppercase; font-weight: 500; color: var(--ink-3); }
.label b { color: var(--teal-ink); font-weight: 500; }
.num { font-variant-numeric: tabular-nums lining-nums; font-feature-settings: "tnum" 1, "lnum" 1; }
.note { font-size: var(--fs-xs); line-height: 1.5; color: var(--ink-3); max-width: 70ch; }
.tlink { color: var(--teal-ink); border-bottom: 1px solid rgba(0, 114, 151, .35); transition: border-color .2s var(--ease-ui), color .2s var(--ease-ui); }
@media (hover: hover) { .tlink:hover { color: var(--ink); border-color: var(--ink); } }

/* ---------- buttons ---------- */
.btn {
  --bg: var(--ink); --fg: #F3FAFB;
  display: inline-flex; align-items: center; gap: 10px; min-height: 52px; padding: 0 26px;
  border-radius: var(--r-chip); background: var(--bg); color: var(--fg);
  font-size: 1rem; font-weight: 500; letter-spacing: -.005em; white-space: nowrap;
  transition: background-color .22s var(--ease-ui), color .22s var(--ease-ui), transform .16s var(--ease-ui), box-shadow .22s var(--ease-ui);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .08) inset, 0 10px 24px -14px rgba(6, 34, 43, .55);
}
.btn .arr { width: 16px; height: 16px; flex: none; transition: transform .22s var(--ease-ui); }
.btn:active { transform: scale(.97); }
.btn-ghost { --bg: transparent; --fg: var(--ink); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn-light { --bg: #F3FAFB; --fg: var(--deep); }
.btn-ghost-inv { --bg: transparent; --fg: #EAF6F8; box-shadow: inset 0 0 0 1px var(--line-inv); }
.btn-sm { min-height: 42px; padding: 0 18px; font-size: .9375rem; }
@media (hover: hover) {
  .btn:hover { --bg: var(--teal); }
  .btn:hover .arr { transform: translateX(3px); }
  .btn-ghost:hover { --bg: var(--ink); --fg: #F3FAFB; box-shadow: inset 0 0 0 1px var(--ink); }
  .btn-light:hover { --bg: #fff; }
  .btn-ghost-inv:hover { --bg: #EAF6F8; --fg: var(--deep); }
}

/* ---------- air layers (fixed, behind content) ---------- */
.air-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    linear-gradient(118deg, rgba(255, 253, 246, 0) 18%, rgba(255, 252, 240, .85) 40%, rgba(255, 253, 246, 0) 62%),
    linear-gradient(180deg, #E6EFF2 0%, var(--air-0) 62%, var(--paper) 100%);
}
.air-bg::after { content: ""; position: absolute; inset: 0; opacity: var(--dim, 0); background: radial-gradient(110% 90% at 68% 42%, #0C3644 0%, #06222B 52%, #03171D 100%); }
.air-canvas { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; opacity: 0; transition: opacity 1.6s var(--ease-ui); }
.air-canvas.is-on { opacity: 1; }
main, .footer { position: relative; z-index: 2; }

/* ---------- nav ---------- */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--nav-h); transition: transform .42s var(--ease-move), background-color .3s var(--ease-ui), box-shadow .3s var(--ease-ui); }
.nav.is-solid { background: rgba(245, 248, 249, .82); -webkit-backdrop-filter: saturate(1.4) blur(18px); backdrop-filter: saturate(1.4) blur(18px); box-shadow: 0 1px 0 var(--line); }
.nav.is-hidden { transform: translateY(-100%); }
/* while the room is dimmed the bar goes dark with it, so scrolling back up never flashes a white strip over the scene */
.is-dim .nav.is-solid { background: rgba(4, 26, 33, .72); box-shadow: 0 1px 0 var(--line-inv); }
.nav .brand { transition: color .3s var(--ease-ui); }
.is-dim .nav .brand { color: #EAF6F8; }
.is-dim .nav .nav-links a { color: #B7D0D7; }
.is-dim .nav .nav-links a[aria-current="page"] { color: #fff; }
.is-dim .nav .btn-ghost { --fg: #EAF6F8; box-shadow: inset 0 0 0 1px var(--line-inv); }
.is-dim .nav .btn:not(.btn-ghost) { --bg: #EAF6F8; --fg: var(--deep); }
.is-dim .nav .nav-toggle { color: #EAF6F8; box-shadow: inset 0 0 0 1px var(--line-inv); }
@media (hover: hover) { .is-dim .nav .nav-links a:hover { color: #fff; } .is-dim .nav .btn-ghost:hover { --bg: #EAF6F8; --fg: var(--deep); } .is-dim .nav .btn:not(.btn-ghost):hover { --bg: #fff; } }
.nav-in { height: 100%; display: flex; align-items: center; gap: var(--s-6); }
.brand { display: block; flex: none; color: var(--teal); }
.brand svg { height: 30px; width: auto; }
.brand .a { fill: currentColor; } .brand .b { fill: var(--cyan); }
.nav-links { display: flex; gap: clamp(14px, 2.2vw, 34px); margin-left: auto; }
.nav-links a { position: relative; font-size: .9688rem; color: var(--ink-2); padding: 10px 2px; transition: color .2s var(--ease-ui); }
.nav-links a::after { content: ""; position: absolute; left: 2px; right: 2px; bottom: 4px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform .28s var(--ease-out); }
.nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a[aria-current="page"]::after { transform: scaleX(1); }
@media (hover: hover) { .nav-links a:hover { color: var(--ink); } .nav-links a:hover::after { transform: scaleX(1); } }
.nav-cta { display: flex; gap: 10px; align-items: center; }
.nav-toggle { display: none; min-height: 44px; padding: 0 16px; border-radius: var(--r-chip); box-shadow: inset 0 0 0 1px var(--line-2); font-size: .9375rem; font-weight: 500; }

.menu { position: fixed; inset: 0; z-index: 49; background: var(--air-0); padding: calc(var(--nav-h) + 24px) var(--pad) 32px; display: flex; flex-direction: column; overflow-y: auto;
  opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .24s var(--ease-in), transform .24s var(--ease-in), visibility 0s linear .24s; }
.menu.is-open { opacity: 1; visibility: visible; transform: none; transition: opacity .3s var(--ease-out), transform .3s var(--ease-out), visibility 0s; }
.menu a.m { display: flex; justify-content: space-between; align-items: baseline; font-size: clamp(1.9rem, 8vw, 2.6rem); font-weight: 300; letter-spacing: -.03em; line-height: 1.1; padding: 16px 0; border-bottom: 1px solid var(--line); }
.menu a.m span { font-size: var(--fs-label); letter-spacing: .14em; color: var(--ink-3); font-weight: 500; }
.menu-cta { margin-top: auto; padding-top: 28px; display: grid; gap: 10px; }
.menu-cta .btn { justify-content: center; }

/* ---------- reveal on ready / on approach ---------- */
.js [data-rv] { opacity: 0; transform: translate3d(0, 26px, 0); }
.js [data-rv="fade"] { transform: none; }
.js [data-rv].rv-in, .js .is-ready [data-rv-hero] { opacity: 1; transform: none; transition: opacity .9s var(--ease-out) var(--d, 0ms), transform 1.05s var(--ease-out) var(--d, 0ms); }
.mask-line { display: block; overflow: hidden; padding-bottom: .12em; margin-bottom: -.12em; }
.mask-line > span { display: block; }
.js .mask-line > span { transform: translate3d(0, 112%, 0); }
.js .is-ready .mask-line > span, .js .mask-line.rv-in > span { transform: none; transition: transform 1.1s var(--ease-out) var(--d, 0ms); }

/* =====================================================================
   THE JOURNEY: hero, every-side tour, inside view, fan speeds.
   Static by default (photo + schematic window). html.motion pins the chapters
   and a real-time 3D Brio 650 on the fixed canvas travels through them.
   ===================================================================== */
.journey { position: relative; }
.ch { position: relative; }
.ch-grid { position: relative; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(16px, 2vw, 32px); align-items: center; }
.ch-hero { padding-top: calc(var(--nav-h) + 24px); padding-bottom: var(--s-8); }
.ch-tour, .ch-inside, .ch-speeds { padding-block: clamp(56px, 7vw, 104px); border-top: 1px solid var(--line); }
.hero-copy { grid-column: 1 / span 6; position: relative; z-index: 3; }
.hero-copy .label { display: flex; align-items: center; gap: 12px; margin-bottom: var(--s-6); }
.hero-copy .label i { width: 28px; height: 1px; background: var(--ink-3); }
.hero-copy h1 { margin-bottom: var(--s-6); }
.hero-copy .lead { max-width: 33em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: var(--s-7); }
.hero-certs { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: var(--s-7); font-size: var(--fs-xs); color: var(--ink-3); letter-spacing: .02em; }
.hero-certs li { display: flex; align-items: center; gap: 8px; }
.hero-certs li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--teal); }

/* static fallback figure: the product photo with the schematic window projected onto its front face (scene.js) */
.brio { grid-column: 7 / span 6; position: relative; z-index: 2; justify-self: center; width: min(100%, 560px); aspect-ratio: 899 / 1189; isolation: isolate; }
.brio > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; z-index: 1; filter: drop-shadow(0 30px 40px rgba(6, 34, 43, .1)); }
.brio-shadow { position: absolute; left: 6%; right: 2%; bottom: -1.5%; height: 9%; z-index: 0; border-radius: 50%; background: radial-gradient(closest-side, rgba(6, 34, 43, .28), rgba(6, 34, 43, 0) 100%); filter: blur(10px); transform: skewX(-24deg); }
.brio-led, .brio-flow { display: none; }
.xray { position: absolute; left: 0; top: 0; width: 400px; height: 680px; z-index: 3; transform-origin: 0 0; border-radius: 14px; overflow: hidden; display: none;
  background: linear-gradient(180deg, #082A35 0%, #051C24 100%);
  box-shadow: 0 0 0 1.5px rgba(0, 166, 206, .55), 0 0 0 7px rgba(6, 34, 43, .08), inset 0 0 60px rgba(0, 0, 0, .55); }
.js .xray { display: block; visibility: hidden; }
.xray svg, .xray canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.xray .lyr { opacity: 1; }
.xray .lyr-tag { font: 500 15px/1 var(--ff); letter-spacing: .12em; fill: #9FDDEC; }
.xray .tick { stroke: rgba(125, 211, 232, .7); stroke-width: 1.5; fill: none; }
.xray-note { position: absolute; left: 50%; bottom: -4.5%; transform: translateX(-50%); z-index: 4; white-space: nowrap; font-size: .6875rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); opacity: 0; }

.ch-copy { grid-column: 1 / span 7; position: relative; z-index: 3; }
.ch-copy .label { display: block; margin-bottom: var(--s-5); }
.ch-copy .d2 { margin-bottom: var(--s-5); }
.ch-copy .lead { max-width: 30em; }
.dims { display: flex; flex-wrap: wrap; gap: 0; margin-top: var(--s-7); border-top: 1px solid var(--line-2); max-width: 34rem; }
.dims > div { flex: 1 1 0; padding: 18px 18px 0 0; }
.dims > div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.dims dt { font-size: clamp(1.9rem, 2.8vw, 2.75rem); font-weight: 300; letter-spacing: -.04em; line-height: 1; white-space: nowrap; }
.dims dt small { font-size: .38em; letter-spacing: 0; margin-left: .2em; color: var(--ink-2); font-weight: 400; }
.dims dd { margin-top: 8px; font-size: var(--fs-xs); color: var(--ink-3); }
.tour-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(24px, 4vw, 72px); margin: var(--s-8) auto 0; padding-inline: var(--pad); max-width: calc(var(--max) + var(--pad) * 2); }
.tour-notes li { padding: 14px 0; border-top: 1px solid var(--line); font-size: var(--fs-sm); color: var(--ink-2); }
.tour-notes b { color: var(--ink); font-weight: 500; margin-right: 6px; }

.stages { grid-column: 1 / -1; position: relative; z-index: 3; }
.stages-head { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: var(--s-6); }
.stages-head h2 { max-width: 14em; }
.stage-wrap { position: relative; }
.stage-list { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: clamp(14px, 1.6vw, 28px); }
.stage { position: relative; padding-top: var(--s-5); border-top: 1px solid var(--line-2); }
.stage .n { display: block; font-size: var(--fs-label); letter-spacing: .14em; color: var(--teal-ink); font-weight: 500; margin-bottom: 10px; }
.stage h3 { margin-bottom: 8px; }
.stage p { color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.55; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.chips li { font-size: .75rem; letter-spacing: .01em; padding: 6px 11px; border-radius: var(--r-chip); box-shadow: inset 0 0 0 1px var(--line-2); color: var(--ink-2); white-space: nowrap; }
.rail { display: none; }
.outro { grid-column: 1 / span 7; margin-top: var(--s-8); position: relative; z-index: 3; }
.outro .d2 { margin-bottom: var(--s-5); }
.outro .lead { max-width: 30em; }
.speeds-panel { grid-column: 1 / -1; position: relative; z-index: 3; }
.speeds-panel > .label { display: block; margin-bottom: var(--s-5); }
.speeds-panel > .d2 { margin-bottom: var(--s-6); }
/* explore: without motion it is a plain grid of part cards. With motion the same articles feed the 3D explorer's panel */
.ch-explore { padding-block: clamp(56px, 7vw, 104px); border-top: 1px solid var(--line); }
.ex-head .label { display: block; margin-bottom: var(--s-5); }
.ex-sub { display: none; }
.parts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(14px, 1.6vw, 24px); margin-top: var(--s-7); }
.part { padding: var(--s-5); border-radius: var(--r-md); background: var(--paper); box-shadow: inset 0 0 0 1px var(--line); }
.part .sum { margin-top: 10px; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.55; }
.pf { margin-top: var(--s-4); }
.pf > div { display: grid; grid-template-columns: 8.2rem 1fr; gap: 14px; padding: 10px 0; border-top: 1px solid var(--line); font-size: var(--fs-xs); line-height: 1.45; }
.pf dt { color: var(--ink-3); }
.pf dd { color: var(--ink); }
.part .pp-alt, .ex-ui, .part-panel { display: none; }
@media (max-width: 900px) { .parts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .parts { grid-template-columns: minmax(0, 1fr); } }
.monitor, .scroll-cue, .turn-hint, .tags, .model-note { display: none; }

/* ----- motion mode: pinned chapters over the 3D canvas ----- */
.motion .journey, .motion .ch-tour { touch-action: pan-y; }
.motion .ch-tour { background: transparent; }
.motion .ch-tour, .motion .ch-inside, .motion .ch-speeds, .motion .ch-explore { padding: 0; border: 0; }
.motion .ch-hero { height: 100vh; height: 100svh; padding: 0; }
.motion .ch-hero .ch-grid { height: 100%; padding-top: var(--nav-h); }
.motion .ch-hero .hero-copy { padding-bottom: 4vh; }
.motion .ch-hero .brio { display: none; }
.motion .ch-tour { height: 340vh; cursor: grab; }
.motion .ch-inside { height: 540vh; }
.motion .ch-speeds { height: 330vh; }
.motion .ch-explore { height: 230vh; }
.motion.is-dragging, .motion.is-dragging .ch-tour { cursor: grabbing; user-select: none; -webkit-user-select: none; }
.motion .ch-pin { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: clip; }
.motion .ch-pin .ch-grid { height: 100%; padding-top: var(--nav-h); }
.motion .ch-copy { grid-column: 1 / span 5; }
.motion .tour-notes { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); margin: 0; padding: 0; }

.motion .stages, .motion .outro { grid-row: 1; align-self: center; margin-top: 0; }
.motion .stages { grid-column: 1 / span 5; opacity: 0; }
.motion .outro { grid-column: 1 / span 5; opacity: 0; }
.motion .stages-head { display: block; margin-bottom: var(--s-6); }
.motion .stages-head .label { color: #8FB3BD; }
.motion .stages-head h2 { margin-top: var(--s-4); font-size: var(--fs-d3); color: #EAF6F8; }
.motion .stage-wrap { padding-left: 28px; }
.motion .stage-list { display: block; position: relative; }
.motion .rail { display: block; position: absolute; left: 0; top: 6px; bottom: 6px; width: 1px; background: rgba(240, 250, 252, .2); }
.motion .rail i { position: absolute; inset: 0; background: var(--cyan-soft); transform-origin: 50% 0; transform: scaleY(0); }
.motion .stage { border: 0; padding: 8px 0; display: grid; grid-template-columns: 38px 1fr; column-gap: 8px; opacity: .4; transition: opacity .4s var(--ease-ui); }
.motion .stage .n { grid-row: 1; margin: 0; padding-top: .42em; color: var(--cyan-soft); }
.motion .stage h3 { grid-column: 2; margin: 0; font-weight: 400; font-size: clamp(1.2rem, 1.6vw, 1.5rem); letter-spacing: -.018em; color: #EAF6F8; }
.motion .stage p { color: #B7D0D7; }
.motion .stage .chips li { color: #CFE3E8; box-shadow: inset 0 0 0 1px var(--line-inv); }
.motion .stage .more { grid-column: 2; display: grid; grid-template-rows: 0fr; transition: grid-template-rows .55s var(--ease-move); }
.motion .stage .more > div { overflow: hidden; min-height: 0; max-width: 30em; opacity: 0; transition: opacity .3s var(--ease-ui); }
.motion .stage.is-active { opacity: 1; }
.motion .stage.is-active .more { grid-template-rows: 1fr; }
.motion .stage.is-active .more > div { opacity: 1; padding-top: 8px; padding-bottom: 4px; transition: opacity .5s var(--ease-ui) .12s; }

.motion .speeds-panel { grid-column: 7 / span 6; align-self: center; }
.motion .speeds-panel > .d2 { font-size: var(--fs-d3); margin-bottom: var(--s-5); }

/* ----- explore: the unit in the centre, fixed labels with leader lines, select one to dive into that part ----- */
.motion .ex-wrap { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
.motion .ex-head { position: absolute; left: var(--pad); right: var(--pad); top: calc(var(--nav-h) + 2vh); text-align: center; opacity: 0; transform: translate3d(0, 14px, 0); transition: opacity .35s var(--ease-in), transform .35s var(--ease-in); }
.motion .ex-head .label { margin-bottom: var(--s-3); }
.motion .ex-head .d2 { font-size: var(--fs-d3); }
.motion .ex-sub { display: block; margin-top: 10px; font-size: var(--fs-sm); color: var(--ink-3); }
.motion .ch-explore.is-in .ex-head { opacity: 1; transform: none; transition: opacity .8s var(--ease-out) .1s, transform .9s var(--ease-out) .1s; }
.motion .ch-explore .parts { display: none; }
.motion .ex-ui { display: block; position: absolute; inset: 0; z-index: 4; pointer-events: none; }
.ex-ui > svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.ex-ln { fill: none; stroke: var(--teal); stroke-width: 1; stroke-dasharray: 1; stroke-dashoffset: 1; opacity: 0; transition: stroke-dashoffset .3s var(--ease-in), opacity .3s linear, stroke .2s linear; }
.is-in .ex-ln { stroke-dashoffset: 0; opacity: .6; transition: stroke-dashoffset 1s var(--ease-out) calc(var(--i) * 70ms + .3s), opacity .2s linear calc(var(--i) * 70ms + .3s), stroke .2s linear; }
.is-in .ex-ln.is-hot { stroke: var(--cyan); opacity: 1; stroke-width: 1.5; }
.ex-dot { position: absolute; left: 0; top: 0; width: 32px; height: 32px; margin: -16px 0 0 -16px; border-radius: 50%; pointer-events: auto; visibility: hidden; transition: visibility 0s linear .3s; }
.ex-dot i { position: absolute; inset: 10px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 2px rgba(255, 255, 255, .92), 0 0 0 7px rgba(0, 114, 151, .16); opacity: 0; transform: scale(.4); transition: opacity .25s var(--ease-in), transform .25s var(--ease-in), background-color .2s linear; }
.ex-dot i::after { content: ""; position: absolute; inset: -5px; border-radius: 50%; border: 1px solid var(--teal); opacity: 0; animation: exPulse 2.8s var(--ease-out) infinite; animation-delay: calc(var(--i) * .35s); }
.ex-dot b { display: none; }
@keyframes exPulse { 0% { transform: scale(.7); opacity: .7; } 70%, 100% { transform: scale(2.2); opacity: 0; } }
.is-in .ex-dot { visibility: visible; transition: visibility 0s; }
.is-in .ex-dot i { opacity: 1; transform: none; transition: opacity .4s var(--ease-out) calc(var(--i) * 70ms + .9s), transform .6s var(--ease-out) calc(var(--i) * 70ms + .9s), background-color .2s linear; }
.is-in .ex-dot.is-hot i { background: var(--cyan); transform: scale(1.35); transition: transform .3s var(--ease-out), background-color .2s linear; }
.ex-lbs { position: absolute; inset: 0; }
.ex-lb { position: absolute; left: 0; top: 0; pointer-events: auto; border-radius: var(--r-chip); visibility: hidden; transition: visibility 0s linear .35s; }
.ex-lb.is-l { --dir: -1; } .ex-lb.is-r { --dir: 1; }
.ex-lb-in { display: inline-flex; align-items: center; gap: 12px; min-height: 46px; padding: 0 14px 0 16px; border-radius: var(--r-chip); white-space: nowrap; font-size: .9375rem; color: var(--ink);
  background: rgba(251, 252, 251, .84); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); box-shadow: inset 0 0 0 1px var(--line), 0 14px 30px -20px rgba(6, 34, 43, .5);
  opacity: 0; transform: translate3d(calc(var(--dir) * 14px), 0, 0); transition: opacity .3s var(--ease-in), transform .3s var(--ease-in), background-color .2s var(--ease-ui), box-shadow .2s var(--ease-ui); }
.ex-lb .n { font-size: var(--fs-label); letter-spacing: .14em; color: var(--teal-ink); font-weight: 500; }
.ex-lb svg { width: 16px; height: 16px; flex: none; color: var(--teal-ink); transition: transform .4s var(--ease-out); }
.is-in .ex-lb { visibility: visible; transition: visibility 0s; }
.is-in .ex-lb-in { opacity: 1; transform: none; transition: opacity .6s var(--ease-out) calc(var(--i) * 70ms + .45s), transform .8s var(--ease-out) calc(var(--i) * 70ms + .45s), background-color .2s var(--ease-ui), box-shadow .2s var(--ease-ui); }
.is-in .ex-lb.is-hot .ex-lb-in { background: var(--paper); box-shadow: inset 0 0 0 1px var(--teal), 0 16px 34px -18px rgba(6, 34, 43, .55); transition: background-color .2s var(--ease-ui), box-shadow .2s var(--ease-ui), transform .16s var(--ease-ui); }
.is-in .ex-lb.is-hot svg { transform: rotate(90deg); }
.is-in .ex-lb:active .ex-lb-in { transform: scale(.97); }
@media (min-width: 901px) and (max-width: 1240px) { .ex-lb-in { white-space: normal; max-width: 212px; text-align: left; line-height: 1.2; padding-block: 8px; } }

.motion .part-panel { display: flex; flex-direction: column; position: absolute; z-index: 5; right: var(--pad); top: 50%; width: min(470px, 36vw); max-height: calc(100svh - var(--nav-h) - 72px); overflow: hidden; padding: 26px 30px 24px; border-radius: var(--r-lg); color: #EAF6F8; outline: none;
  background: rgba(5, 28, 36, .76); -webkit-backdrop-filter: blur(16px) saturate(1.2); backdrop-filter: blur(16px) saturate(1.2); box-shadow: inset 0 0 0 1px var(--line-inv), 0 40px 90px -50px rgba(0, 0, 0, .7);
  opacity: 0; visibility: hidden; transform: translate3d(28px, -50%, 0); transition: opacity .25s var(--ease-in), transform .25s var(--ease-in), visibility 0s linear .25s; }
.motion .ch-explore.is-open .part-panel { opacity: 1; visibility: visible; transform: translate3d(0, -50%, 0); transition: opacity .6s var(--ease-out) .45s, transform .9s var(--ease-out) .45s, visibility 0s; }
.pp-top { flex: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.pp-count { font-size: var(--fs-label); letter-spacing: .14em; color: var(--cyan-soft); font-weight: 500; }
.pp-close { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 12px 0 16px; border-radius: var(--r-chip); font-size: var(--fs-xs); letter-spacing: .04em; color: #CFE3E8; box-shadow: inset 0 0 0 1px var(--line-inv); transition: background-color .2s var(--ease-ui), color .2s var(--ease-ui); }
.pp-close svg { width: 14px; height: 14px; }
@media (hover: hover) { .pp-close:hover { background: #EAF6F8; color: var(--deep); } }
.pp-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding-bottom: 20px; outline-offset: -2px; scrollbar-width: thin; scrollbar-color: rgba(240, 250, 252, .28) transparent; transition: opacity .18s var(--ease-ui);
  -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 20px), transparent); mask-image: linear-gradient(to bottom, #000 calc(100% - 20px), transparent); }
.pp-body.is-swap { opacity: 0; }
.pp-body h3 { font-size: var(--fs-d3); font-weight: 300; letter-spacing: -.024em; line-height: 1.1; color: #F3FAFB; text-wrap: balance; outline: none; }
.pp-body .sum { margin-top: 14px; color: #B7D0D7; font-size: 1rem; line-height: 1.55; }
.pp-body .pf { margin-top: 20px; }
.pp-body .pf > div { grid-template-columns: 8.6rem 1fr; border-top-color: var(--line-inv); font-size: var(--fs-sm); padding: 11px 0; }
.pp-body .pf dt { color: #8FB3BD; }
.pp-body .pf dd { color: #EAF6F8; }
.pp-body .pp-alt { display: inline-flex; margin-top: 16px; }
.pp-nav { flex: none; display: flex; gap: 10px; margin-top: 4px; }
.pp-nav .btn { flex: 1 1 0; justify-content: center; }
.part-panel :focus-visible { outline-color: var(--cyan-soft); }
.motion .ch-explore .model-note { color: var(--ink-3); transition: opacity .4s var(--ease-ui), color .4s var(--ease-ui); }
.motion .ch-explore.is-in .model-note, .motion .ch-explore.is-open .model-note { opacity: .9; }
.is-dim .ch-explore .model-note { color: #8FB3BD; }

.motion .model-note { display: block; position: absolute; right: var(--pad); bottom: clamp(18px, 3.6vh, 36px); z-index: 4; font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase; color: #8FB3BD; opacity: 0; }
.motion .monitor { position: fixed; z-index: 7; left: max(var(--pad), 88px); bottom: clamp(18px, 3.6vh, 36px); display: inline-flex; align-items: center; gap: 12px; padding: 10px 18px 10px 14px; border-radius: var(--r-chip);
  background: rgba(251, 252, 251, .74); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); box-shadow: inset 0 0 0 1px var(--line), 0 12px 30px -18px rgba(6, 34, 43, .4); font-size: var(--fs-sm); color: var(--ink-2);
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .3s var(--ease-ui), transform .3s var(--ease-ui), visibility 0s linear .3s, background-color .4s var(--ease-ui), color .4s var(--ease-ui); }
.motion .monitor.is-on { opacity: 1; visibility: visible; transform: none; transition: opacity .4s var(--ease-out), transform .4s var(--ease-out), visibility 0s, background-color .4s var(--ease-ui), color .4s var(--ease-ui); }
.monitor .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px rgba(201, 138, 43, .18); transition: background-color .8s var(--ease-ui), box-shadow .8s var(--ease-ui); }
.monitor.is-clear .dot { background: var(--good); box-shadow: 0 0 0 4px rgba(47, 181, 116, .2); }
.monitor b { font-weight: 500; color: var(--ink); min-width: 2.6em; display: inline-block; text-align: right; transition: color .4s var(--ease-ui); }
.monitor .sep { width: 1px; height: 14px; background: var(--line-2); }
.is-dim .monitor { background: rgba(6, 34, 43, .62); color: #B7D0D7; box-shadow: inset 0 0 0 1px var(--line-inv); }
.is-dim .monitor b { color: #EAF6F8; }
.is-dim .monitor .sep { background: var(--line-inv); }

.motion .turn-hint { position: absolute; z-index: 5; left: 50%; bottom: clamp(18px, 3.6vh, 36px); transform: translateX(-50%); display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px 0 14px; border-radius: var(--r-chip); font-size: var(--fs-xs); letter-spacing: .04em; color: var(--ink-2);
  background: rgba(251, 252, 251, .6); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); box-shadow: inset 0 0 0 1px var(--line); transition: background-color .2s var(--ease-ui), color .2s var(--ease-ui), transform .16s var(--ease-ui); }
.turn-hint svg { width: 18px; height: 18px; }
.motion .turn-hint:active { transform: translateX(-50%) scale(.97); }
@media (hover: hover) { .motion .turn-hint:hover { background: var(--paper); color: var(--ink); } }
.motion .scroll-cue { position: absolute; z-index: 4; right: var(--pad); bottom: clamp(18px, 3.6vh, 36px); display: flex; align-items: center; gap: 12px; font-size: var(--fs-label); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.scroll-cue i { display: block; width: 1px; height: 38px; background: var(--line-2); position: relative; overflow: hidden; }
.scroll-cue i::after { content: ""; position: absolute; inset: 0; background: var(--teal); transform: translateY(-100%); animation: cue 2.4s var(--ease-move) infinite; }
@keyframes cue { 0% { transform: translateY(-100%); } 60%, 100% { transform: translateY(100%); } }

/* callout tags that track points on the 3D model */
.motion .tags { display: block; position: fixed; inset: 0; z-index: 6; pointer-events: none; overflow: hidden; }
.tag { position: absolute; left: 0; top: 0; opacity: 0; visibility: hidden; will-change: transform, opacity; --c: var(--teal); }
.tag-dot { position: absolute; left: -4px; top: -4px; width: 8px; height: 8px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 22%, transparent); }
.tag-ln { position: absolute; left: 0; top: 0; height: 1px; width: 60px; background: var(--c); opacity: .7; transform-origin: 0 50%; }
.tag-tx { position: absolute; left: 0; top: 0; white-space: nowrap; padding: 9px 14px; border-radius: 12px; background: rgba(251, 252, 251, .86); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); box-shadow: inset 0 0 0 1px var(--line), 0 14px 30px -20px rgba(6, 34, 43, .5); }
.tag-tx b { display: block; font-weight: 500; font-size: .9375rem; letter-spacing: -.005em; color: var(--ink); }
.tag-tx small { display: block; margin-top: 2px; font-size: .8125rem; color: var(--ink-3); }
.is-dim .tag { --c: var(--cyan-soft); }
.is-dim .tag-tx { background: rgba(6, 34, 43, .72); box-shadow: inset 0 0 0 1px var(--line-inv); }
.is-dim .tag-tx b { color: #EAF6F8; } .is-dim .tag-tx small { color: #9DBAC3; }

/* ---------- sections ---------- */
.sec { position: relative; padding-block: clamp(88px, 12vw, 176px); background: var(--air-0); }
.sec-tint { background: var(--air-1); }
.sec-paper { background: var(--paper); }
.sec-deep { background: var(--deep); color: #EAF6F8; }
.sec-deep .label { color: #8FB3BD; } .sec-deep .label b { color: var(--cyan-soft); }
.sec-deep .lead, .sec-deep .body { color: #B7D0D7; }
.sec-tight { padding-block: clamp(64px, 8vw, 112px); }
.sec-head { margin-bottom: clamp(40px, 5vw, 72px); }
.sec-head .label { margin-bottom: var(--s-5); display: block; }
.first-sec { border-top: 1px solid var(--line); }

/* hold: the dust-loading chart */
.hold-copy { grid-column: 1 / span 5; align-self: center; }
.hold-copy .d2 { margin-bottom: var(--s-6); }
.hold-copy .facts { margin-top: var(--s-7); display: grid; gap: 0; }
.fact { display: grid; grid-template-columns: 7.5rem 1fr; gap: 18px; align-items: baseline; padding: 18px 0; border-top: 1px solid var(--line); }
.fact:last-child { border-bottom: 1px solid var(--line); }
.fact dt { font-size: 1.75rem; font-weight: 300; letter-spacing: -.03em; line-height: 1; color: var(--ink); }
.fact dd { font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.5; }
.chart { grid-column: 7 / span 6; align-self: center; background: var(--paper); border-radius: var(--r-lg); padding: clamp(20px, 2.6vw, 40px); box-shadow: inset 0 0 0 1px var(--line), 0 40px 80px -60px rgba(6, 34, 43, .35); }
.chart-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; margin-bottom: 8px; }
.legend { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: var(--fs-xs); color: var(--ink-2); }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 18px; height: 3px; border-radius: 2px; background: var(--teal); }
.legend .m i { background: var(--amber); }
.chart svg { width: 100%; height: auto; overflow: visible; }
.chart .axis { stroke: var(--line-2); stroke-width: 1; fill: none; }
.chart .gridl { stroke: var(--line); stroke-width: 1; fill: none; }
.chart text { font-family: var(--ff); font-size: 12px; fill: var(--ink-3); font-variant-numeric: tabular-nums; }
.chart .ttl { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.chart .ln { fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.chart .ln-a { stroke: var(--teal); } .chart .ln-m { stroke: var(--amber); }
.chart .area-a { fill: url(#gA); opacity: 0; transition: opacity 1.2s var(--ease-ui) 1.1s; }
.js .chart .ln { stroke-dasharray: 1; stroke-dashoffset: 1; }
.js .chart.rv-in .ln { stroke-dashoffset: 0; transition: stroke-dashoffset 2.2s var(--ease-move) .25s; }
.js .chart.rv-in .ln-m { transition-duration: 1.7s; }
.chart.rv-in .area-a, html:not(.js) .chart .area-a { opacity: 1; }
.chart .call { opacity: 1; }
.js .chart .call { opacity: 0; transform: translateY(6px); transition: opacity .6s var(--ease-out) 1.9s, transform .6s var(--ease-out) 1.9s; }
.js .chart.rv-in .call { opacity: 1; transform: none; }
.chart .call text { fill: var(--ink); font-size: 13px; font-weight: 500; }
.chart .call .sub { fill: var(--ink-3); font-weight: 400; font-size: 12px; }
.chart .call circle { fill: var(--paper); stroke-width: 2.5; }
.chart .note { margin-top: 14px; }

/* numbers band */
.nums { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-2); }
.nums > div { padding: clamp(24px, 3vw, 44px) clamp(12px, 2vw, 32px) 0 0; }
.nums > div + div { padding-left: clamp(12px, 2vw, 32px); border-left: 1px solid var(--line); }
.nums .big { font-size: clamp(2.6rem, 5.4vw, 5.25rem); font-weight: 300; letter-spacing: -.045em; line-height: 1; color: var(--ink); white-space: nowrap; }
.nums .big small { font-size: .34em; letter-spacing: 0; margin-left: .18em; color: var(--ink-2); font-weight: 400; }
.nums p { margin-top: 14px; font-size: var(--fs-sm); color: var(--ink-2); max-width: 22em; line-height: 1.5; }

/* quiet: fan-speed instrument */
.quiet-copy { grid-column: 1 / span 5; }
.quiet-copy .d2 { margin-bottom: var(--s-6); }
.owl { margin-top: var(--s-7); padding-top: var(--s-5); border-top: 1px solid var(--line); }
.owl .h3 { margin-bottom: 10px; }
.owl p { color: var(--ink-2); font-size: var(--fs-sm); max-width: 34em; }
.owl p + p { margin-top: 12px; }
.inst { background: var(--deep); color: #EAF6F8; border-radius: var(--r-lg); padding: clamp(22px, 2.8vw, 44px); position: relative; overflow: hidden; box-shadow: 0 50px 90px -60px rgba(6, 34, 43, .7); }
.inst-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.inst .label { color: #8FB3BD; }
.speeds { display: inline-grid; grid-auto-flow: column; gap: 4px; padding: 4px; border-radius: var(--r-chip); background: rgba(255, 255, 255, .06); box-shadow: inset 0 0 0 1px var(--line-inv); position: relative; }
.speeds button { position: relative; z-index: 1; width: 52px; height: 44px; border-radius: var(--r-chip); font-size: 1rem; font-weight: 500; color: #9DBAC3; transition: color .2s var(--ease-ui), transform .16s var(--ease-ui); }
.speeds button[aria-checked="true"] { color: var(--deep); }
.speeds button:active { transform: scale(.95); }
.speeds .thumb { position: absolute; z-index: 0; top: 4px; left: 4px; width: 52px; height: 44px; border-radius: var(--r-chip); background: #EAF6F8; transition: transform .34s var(--ease-move); }
.speeds button:focus-visible { outline-color: var(--cyan-soft); }
.inst-main { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: clamp(16px, 3vw, 40px); align-items: center; margin-top: clamp(24px, 3vw, 40px); }
.rotor { width: clamp(120px, 15vw, 190px); aspect-ratio: 1; position: relative; }
.rotor svg { width: 100%; height: 100%; overflow: visible; }
/* view-box reference box starts at user 0,0, which is the hub because the viewBox is centred */
.rotor .spin { transform-origin: 0 0; animation: rot var(--spin, 3.4s) linear infinite; }
.rotor .ring { fill: none; stroke: var(--line-inv); }
.rotor .blade { fill: rgba(125, 211, 232, .16); stroke: rgba(125, 211, 232, .8); stroke-width: 1; stroke-linejoin: round; }
.rotor .hub { fill: #0E3A47; stroke: rgba(125, 211, 232, .8); }
@keyframes rot { to { transform: rotate(360deg); } }
.reads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(16px, 2.4vw, 36px); margin-top: clamp(20px, 2.4vw, 32px); }
.read .pct { float: right; font-weight: 500; color: var(--cyan-soft); }
.read { padding: 16px 0; border-top: 1px solid var(--line-inv); }
.read .v { font-size: clamp(2rem, 3.3vw, 3.1rem); font-weight: 300; letter-spacing: -.04em; line-height: 1; white-space: nowrap; }
.read .v small { font-size: .38em; letter-spacing: 0; color: #9DBAC3; margin-left: .25em; font-weight: 400; }
.read .k { margin-top: 8px; font-size: var(--fs-xs); color: #9DBAC3; }
.scale { margin-top: clamp(20px, 2.6vw, 34px); }
.scale-row { display: grid; grid-template-columns: 5.5rem 1fr; align-items: center; gap: 16px; padding: 18px 0 12px; }
.scale-row .k { font-size: var(--fs-xs); color: #9DBAC3; }
.track { position: relative; height: 30px; }
.track::before { content: ""; position: absolute; left: 0; right: 0; top: 14px; height: 2px; background: rgba(255, 255, 255, .1); border-radius: 2px; }
.band { position: absolute; top: 9px; height: 12px; border-radius: 6px; background: rgba(255, 255, 255, .1); }
.band span { position: absolute; left: 0; top: 17px; font-size: .6875rem; color: #8FB3BD; white-space: nowrap; letter-spacing: .02em; }
.band.up span { top: auto; bottom: 16px; }
.band.warn { background: rgba(201, 138, 43, .3); }
.band.warn span { color: #E2B877; left: auto; right: 0; }
.mark { position: absolute; top: 5px; left: 0; width: 20px; height: 20px; margin-left: -10px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(0, 166, 206, .22); transition: transform .5s var(--ease-move); }
.fill { position: absolute; left: 0; top: 12px; height: 6px; width: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--teal), var(--cyan)); transform-origin: 0 50%; transform: scaleX(.2); transition: transform .5s var(--ease-move); }
.pin { position: absolute; top: 4px; bottom: 4px; width: 1px; background: #E2B877; }
.pin span { position: absolute; top: 24px; right: 0; transform: translateX(50%); font-size: .6875rem; color: #E2B877; white-space: nowrap; }
.scale-pad { padding-bottom: 14px; }
.inst .note { color: #8FB3BD; margin-top: 18px; }

.owl-fig { grid-column: 7 / span 6; align-self: center; }
.owl-fig img { width: 100%; height: auto; border-radius: var(--r-lg); background: var(--air-2); }
.owl-fig figcaption { margin-top: 12px; }

/* removes */
.removes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 4vw, 72px); }
.removes h3 { padding-bottom: 14px; margin-bottom: 6px; border-bottom: 1px solid var(--line-2); display: flex; justify-content: space-between; align-items: baseline; }
.removes h3 span { font-size: var(--fs-label); letter-spacing: .14em; color: var(--ink-3); font-weight: 500; }
.removes li { font-size: clamp(1.25rem, 1.9vw, 1.75rem); font-weight: 300; letter-spacing: -.02em; line-height: 1.2; padding: 13px 0; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 14px; }
.removes li::before { content: ""; flex: none; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); transition: background-color .6s var(--ease-ui) var(--d, 0ms), transform .6s var(--ease-out) var(--d, 0ms); }
.removes ul.rv-in li::before { background: var(--cyan); }

/* proof rows */
.proof-rows { border-top: 1px solid var(--line-2); }
.proof { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr) minmax(0, 5fr) auto; gap: clamp(14px, 2vw, 32px); align-items: center; padding: clamp(20px, 2.4vw, 34px) 0; border-bottom: 1px solid var(--line); position: relative; transition: background-color .25s var(--ease-ui); }
.proof h3 { font-size: clamp(1.3rem, 2vw, 1.85rem); font-weight: 300; letter-spacing: -.025em; line-height: 1.12; }
.proof .lab { font-size: var(--fs-sm); color: var(--ink-3); }
.proof .lab b { display: block; color: var(--ink); font-weight: 500; font-size: 1rem; }
.proof p { font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.55; }
.proof .go { display: inline-flex; align-items: center; gap: 10px; font-size: var(--fs-sm); font-weight: 500; color: var(--teal-ink); white-space: nowrap; padding: 12px 0; }
.proof .go::after { content: ""; position: absolute; inset: 0; }
.proof .go svg { width: 16px; height: 16px; transition: transform .22s var(--ease-ui); }
@media (hover: hover) { .proof:hover { background: rgba(0, 114, 151, .04); } .proof:hover .go svg { transform: translate(2px, -2px); } }
.certs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: var(--s-7); }
.certs li { font-size: var(--fs-xs); color: var(--ink-2); padding: 9px 16px; border-radius: var(--r-chip); box-shadow: inset 0 0 0 1px var(--line-2); letter-spacing: .01em; }

/* spaces */
.spaces { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 4vw, 64px) clamp(16px, 2vw, 32px); }
.space p { max-width: 46ch; }
.space figure { border-radius: var(--r-md); overflow: hidden; background: var(--air-2); aspect-ratio: 1600 / 1195; }
.space img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease-out); }
@media (hover: hover) { .space:hover img { transform: scale(1.03); } }
.space .label { display: block; margin: var(--s-5) 0 10px; }
.space h3 { font-size: clamp(1.35rem, 1.9vw, 1.75rem); font-weight: 300; letter-spacing: -.025em; line-height: 1.15; margin-bottom: 10px; }
.space p { font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.55; }

/* ashrae band */
.ashrae { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(16px, 2vw, 32px); align-items: end; }
.ashrae .d2 { grid-column: 1 / span 7; }
.ashrae .side { grid-column: 9 / span 4; }
.ashrae .side .body { margin-bottom: var(--s-6); }
.sec-deep .glow { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(60% 80% at 85% 0%, rgba(0, 166, 206, .16), transparent 70%); }

/* platform */
.plat-head { grid-column: 1 / span 7; margin-bottom: clamp(40px, 5vw, 72px); }
.plat-head .d2 { margin-bottom: var(--s-5); }
.cases { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(16px, 2vw, 32px); }
.case { background: var(--paper); border-radius: var(--r-lg); padding: clamp(24px, 3vw, 48px); box-shadow: inset 0 0 0 1px var(--line); }
.case .label { display: block; margin-bottom: var(--s-5); }
.case .stat { display: flex; gap: clamp(20px, 3vw, 48px); margin-bottom: var(--s-5); }
.case .stat div b { display: block; font-size: clamp(2.2rem, 3.6vw, 3.5rem); font-weight: 300; letter-spacing: -.04em; line-height: 1; }
.case .stat div span { display: block; margin-top: 8px; font-size: var(--fs-xs); color: var(--ink-3); max-width: 14em; line-height: 1.4; }
.case p { font-size: var(--fs-sm); color: var(--ink-2); max-width: 46ch; }
.ip { grid-column: 1 / -1; margin-top: clamp(28px, 3vw, 48px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; padding-top: var(--s-5); border-top: 1px solid var(--line); font-size: var(--fs-sm); color: var(--ink-2); }

/* voice */
.voice { grid-column: 2 / span 10; text-align: left; }
.voice blockquote p { font-size: clamp(1.6rem, 3.1vw, 3rem); font-weight: 300; letter-spacing: -.03em; line-height: 1.16; text-wrap: balance; }
.voice blockquote p::before { content: "\201C"; color: var(--teal); margin-left: -.45em; position: absolute; }
.voice figcaption { margin-top: var(--s-6); display: flex; align-items: center; gap: 14px; font-size: var(--fs-sm); color: var(--ink-2); }
.voice figcaption i { width: 28px; height: 1px; background: var(--ink-3); }

/* insights */
.posts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line-2); }
.post { position: relative; padding: clamp(22px, 2.6vw, 40px) clamp(16px, 2vw, 32px) clamp(22px, 2.6vw, 40px) 0; display: flex; flex-direction: column; min-height: 300px; }
.post + .post { padding-left: clamp(16px, 2vw, 32px); border-left: 1px solid var(--line); }
.post .label { margin-bottom: var(--s-5); }
.post h3 { font-size: clamp(1.35rem, 1.9vw, 1.75rem); font-weight: 300; letter-spacing: -.025em; line-height: 1.15; margin-bottom: 12px; }
.post p { font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.55; }
.post .go { margin-top: auto; padding-top: var(--s-5); display: inline-flex; align-items: center; gap: 10px; font-size: var(--fs-sm); font-weight: 500; color: var(--teal-ink); }
.post .go::after { content: ""; position: absolute; inset: 0; }
.post .go svg { width: 16px; height: 16px; transition: transform .22s var(--ease-ui); }
@media (hover: hover) { .post:hover .go svg { transform: translateX(3px); } .post:hover h3 { color: var(--teal-ink); } }
.post h3 { transition: color .2s var(--ease-ui); }

/* cta */
.cta { text-align: left; overflow: hidden; }
.cta-unit { position: absolute; right: max(var(--pad), calc((100% - var(--max)) / 2)); bottom: -9%; width: clamp(220px, 23vw, 330px); height: auto; filter: drop-shadow(0 40px 60px rgba(0, 0, 0, .45)); pointer-events: none; }
.cta h2, .cta-row { position: relative; z-index: 1; }
.cta .d1 { max-width: 11em; margin-bottom: var(--s-6); }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; }
.price { font-size: var(--fs-sm); color: #B7D0D7; }
.price b { color: #EAF6F8; font-weight: 500; }

/* ---------- footer ---------- */
.footer { background: var(--deep); color: #B7D0D7; padding: clamp(56px, 7vw, 104px) 0 32px; border-top: 1px solid var(--line-inv); }
.footer .brand { color: #EAF6F8; margin-bottom: var(--s-5); display: inline-block; }
.footer .brand svg { height: 34px; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 4fr) repeat(3, minmax(0, 2fr)); gap: clamp(24px, 3vw, 56px); }
.foot-about p { font-size: var(--fs-sm); max-width: 30em; }
.foot-about a.mail { display: inline-block; margin-top: var(--s-5); font-size: 1.25rem; font-weight: 300; letter-spacing: -.015em; color: #EAF6F8; border-bottom: 1px solid var(--line-inv); padding-bottom: 4px; transition: border-color .2s var(--ease-ui); }
@media (hover: hover) { .foot-about a.mail:hover { border-color: var(--cyan-soft); } }
.foot-col h3 { font-size: var(--fs-label); letter-spacing: .14em; text-transform: uppercase; font-weight: 500; color: #8FB3BD; margin-bottom: var(--s-4); }
.foot-col li + li { margin-top: 4px; }
.foot-col a { font-size: var(--fs-sm); display: inline-block; padding: 5px 0; color: #CFE3E8; transition: color .2s var(--ease-ui); }
@media (hover: hover) { .foot-col a:hover { color: #fff; } }
.foot-base { margin-top: clamp(40px, 5vw, 80px); padding-top: 22px; border-top: 1px solid var(--line-inv); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font-size: var(--fs-xs); color: #8FB3BD; padding-left: 0; }
.foot-base ul { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.foot-base a { transition: color .2s var(--ease-ui); }
@media (hover: hover) { .foot-base a:hover { color: #fff; } }
/* keep the fixed accessibility button clear of the last footer line */
.footer { padding-bottom: 96px; }

/* ---------- inner pages ---------- */
.page-hero { padding-top: calc(var(--nav-h) + clamp(56px, 9vw, 136px)); padding-bottom: clamp(56px, 7vw, 104px); background: transparent; position: relative; }
.page-hero .label { display: block; margin-bottom: var(--s-6); }
.page-hero h1 { max-width: 12.5em; }
.page-hero .lead { margin-top: var(--s-6); max-width: 36em; }
.split { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(16px, 2vw, 32px); row-gap: var(--s-7); }
.split > .a { grid-column: 1 / span 4; }
.split > .b { grid-column: 6 / span 7; }
.split .d3 { margin-bottom: var(--s-4); }
.form-split > .b { grid-column: 1 / span 7; grid-row: 1; }
.form-split > .a { grid-column: 9 / span 4; grid-row: 1; }
.prose p { color: var(--ink-2); max-width: 62ch; }
.prose p + p { margin-top: 1.1em; }
.prose h3 { margin: 1.8em 0 .5em; }
.wide-fig { margin-top: clamp(40px, 5vw, 72px); }
.wide-fig img { width: 100%; height: auto; border-radius: var(--r-lg); background: var(--air-2); }
.wide-fig figcaption { margin-top: 12px; }

.steps4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2vw, 32px); counter-reset: s; }
.steps4 li { padding-top: var(--s-5); border-top: 1px solid var(--line-2); }
.steps4 .n { display: block; font-size: var(--fs-label); letter-spacing: .14em; color: var(--teal-ink); font-weight: 500; margin-bottom: 10px; }
.steps4 h3 { margin-bottom: 8px; }
.steps4 p { font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.55; }

.spec { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums lining-nums; }
.spec caption { text-align: left; padding-bottom: 14px; }
.spec th, .spec td { text-align: left; padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); font-weight: 400; font-size: var(--fs-sm); vertical-align: baseline; }
.spec thead th { font-size: var(--fs-label); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; border-bottom-color: var(--line-2); }
.spec tbody th { color: var(--ink); font-weight: 500; }
.spec td { color: var(--ink-2); }
.spec-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.spec-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 4vw, 72px); }
.spec-block h3 { margin-bottom: var(--s-4); }
.dl { border-top: 1px solid var(--line-2); }
.dl > div { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: var(--fs-sm); }
.dl dt { color: var(--ink); font-weight: 500; }
.dl dd { color: var(--ink-2); }

.vs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(16px, 2vw, 32px); }
.vs > div { border-radius: var(--r-lg); padding: clamp(24px, 3vw, 44px); }
.vs .brio-col { background: var(--deep); color: #EAF6F8; }
.vs .hepa-col { background: var(--paper); box-shadow: inset 0 0 0 1px var(--line); }
.vs h3 { font-size: clamp(1.4rem, 2vw, 1.9rem); font-weight: 300; letter-spacing: -.025em; margin-bottom: var(--s-5); }
.vs li { padding: 14px 0 14px 26px; border-top: 1px solid var(--line); font-size: var(--fs-sm); line-height: 1.5; position: relative; }
.vs .brio-col li { border-color: var(--line-inv); color: #CFE3E8; }
.vs li::before { content: ""; position: absolute; left: 2px; top: 1.35em; width: 8px; height: 8px; border-radius: 50%; }
.vs .brio-col li::before { background: var(--cyan); }
.vs .hepa-col li::before { background: var(--amber); }
.vs .hepa-col li { color: var(--ink-2); }

.team { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(24px, 4vw, 72px); border-top: 1px solid var(--line-2); }
.person { padding: clamp(24px, 3vw, 40px) 0; border-bottom: 1px solid var(--line); }
.person h3 { font-size: clamp(1.4rem, 2vw, 1.9rem); font-weight: 300; letter-spacing: -.025em; }
.person .label { display: block; margin: 8px 0 var(--s-4); }
.person p { font-size: var(--fs-sm); color: var(--ink-2); max-width: 56ch; }

.form { display: grid; gap: 18px; }
.form .two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field label { display: block; font-size: var(--fs-sm); font-weight: 500; margin-bottom: 8px; }
.field .hint { display: block; font-weight: 400; color: var(--ink-3); font-size: var(--fs-xs); margin-top: 2px; }
.field input, .field select, .field textarea { width: 100%; font: inherit; font-size: 1rem; color: var(--ink); background: var(--paper); border: 0; border-radius: var(--r-sm); padding: 14px 16px; box-shadow: inset 0 0 0 1px var(--line-2); transition: box-shadow .2s var(--ease-ui); }
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; box-shadow: inset 0 0 0 2px var(--teal); }
.field .err { display: none; color: #A3341F; font-size: var(--fs-xs); margin-top: 6px; }
.field.bad .err { display: block; }
.field.bad input, .field.bad textarea { box-shadow: inset 0 0 0 2px #A3341F; }
.form-status { font-size: var(--fs-sm); color: var(--ink-2); min-height: 1.5em; }
.routes { display: grid; gap: 0; border-top: 1px solid var(--line-2); }
.route { position: relative; padding: 22px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 8px 20px; align-items: center; }
.route h3 { font-size: 1.25rem; font-weight: 400; letter-spacing: -.015em; }
.route p { grid-column: 1; font-size: var(--fs-sm); color: var(--ink-2); }
.route .go { grid-row: 1 / span 2; grid-column: 2; color: var(--teal-ink); }
.route .go::after { content: ""; position: absolute; inset: 0; }
.route .go svg { width: 20px; height: 20px; transition: transform .22s var(--ease-ui); }
@media (hover: hover) { .route:hover .go svg { transform: translate(2px, -2px); } }

.e404 { min-height: 100vh; min-height: 100dvh; display: grid; align-items: center; padding-top: var(--nav-h); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .nav-cta .btn-ghost { display: none; }
  .nav-cta { margin-left: auto; }
  .nav-toggle { display: inline-flex; align-items: center; }
  .proof { grid-template-columns: minmax(0, 1fr) auto; }
  .proof h3 { grid-column: 1; } .proof .lab { grid-column: 1; } .proof p { grid-column: 1 / -1; } .proof .go { grid-column: 2; grid-row: 1; }
  .foot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .foot-about { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .hold-copy, .chart, .quiet-copy, .plat-head { grid-column: 1 / -1; }
  .chart { margin-top: var(--s-7); }
  .nums { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nums > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .nums > div:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: clamp(24px, 3vw, 44px); }
  .removes, .spaces, .posts, .cases, .vs, .team, .spec-grid { grid-template-columns: minmax(0, 1fr); }
  .post + .post { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .post { min-height: 0; padding-right: 0; }
  .ashrae .d2, .ashrae .side { grid-column: 1 / -1; }
  .ashrae .side { margin-top: var(--s-6); }
  .voice { grid-column: 1 / -1; padding-left: .6em; }
  .cta-unit { position: relative; right: auto; bottom: auto; display: block; width: min(62%, 300px); margin: 0 0 -18% auto; order: 3; }
  .cta-in { display: flex; flex-direction: column; }
  .split > .a, .split > .b { grid-column: 1 / -1; grid-row: auto; }
  .steps4 { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--s-6); }
  .hero-copy, .brio, .outro { grid-column: 1 / -1; }
  .brio { margin-top: var(--s-7); width: min(78%, 420px); }

  /* motion on narrow screens: the unit holds the upper half, words sit low */
  .ch-copy, .speeds-panel, .owl-fig { grid-column: 1 / -1; }
  .owl-fig { margin-top: var(--s-7); }
  .tour-notes { grid-template-columns: minmax(0, 1fr); }
  .stage-list { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--s-6); }
  .motion .ch-grid { display: block; position: static; }
  /* align-self would centre an absolutely positioned box inside its insets instead of letting it stretch */
  .motion .ch-copy, .motion .stages, .motion .outro, .motion .speeds-panel { align-self: auto; }
  .motion .ch-hero .hero-copy { position: absolute; left: var(--pad); right: var(--pad); top: calc(var(--nav-h) + 1vh); padding: 0; }
  .motion .hero-copy .label { margin-bottom: var(--s-4); }
  .motion .hero-copy h1 { margin-bottom: var(--s-4); }
  .motion .hero-copy .lead { font-size: 1rem; }
  .motion .hero-actions { margin-top: var(--s-5); }
  .motion .hero-certs { display: none; }
  .motion .ch-copy { position: absolute; left: var(--pad); right: var(--pad); top: calc(var(--nav-h) + 1vh); bottom: 78px; display: flex; flex-direction: column; }
  .motion .ch-copy .d2 { font-size: clamp(1.75rem, 7.4vw, 2.3rem); margin-bottom: 0; }
  .motion .ch-copy .label { margin-bottom: var(--s-3); }
  .motion .ch-copy .lead { display: none; }
  .motion .dims { margin-top: auto; max-width: none; }
  .motion .dims dt { font-size: 1.6rem; }
  .motion .stages, .motion .outro { position: absolute; left: var(--pad); right: var(--pad); bottom: 84px; }
  /* phones: the chapter title rides above the unit, the active part's caption sits under it */
  .motion .stages { top: calc(var(--nav-h) + 6px); display: flex; flex-direction: column; justify-content: space-between; pointer-events: none; }
  .motion .stages-head { display: block; margin: 0; }
  .motion .stages-head h2 { margin-top: 6px; font-size: clamp(1.25rem, 5.9vw, 1.6rem); }
  .motion .stage-wrap { padding-left: 0; }
  .motion .stage-list { display: block; min-height: 11.5em; }
  .motion .rail { display: none; }
  .motion .stage { position: absolute; inset: 0 0 auto 0; opacity: 0; transform: translateY(14px); transition: opacity .3s var(--ease-in), transform .3s var(--ease-in); pointer-events: none; }
  .motion .stage.is-active { opacity: 1; transform: none; transition: opacity .5s var(--ease-out) .1s, transform .5s var(--ease-out) .1s; }
  .motion .stage .more { grid-template-rows: 1fr; }
  .motion .stage .more > div { opacity: 1; padding-top: 6px; }
  .motion .outro .d2 { font-size: clamp(1.9rem, 8vw, 2.5rem); margin-bottom: var(--s-3); }
  .motion .outro .lead { font-size: 1rem; }
  .motion .speeds-panel { position: absolute; left: var(--pad); right: var(--pad); top: calc(var(--nav-h) + 1vh); bottom: 78px; display: flex; flex-direction: column; }
  .motion .speeds-panel > .label { margin-bottom: var(--s-3); }
  .motion .speeds-panel > .d2 { font-size: clamp(1.75rem, 7.4vw, 2.3rem); margin: 0; }
  .motion .speeds-panel .inst { margin-top: auto; }
  .motion .inst { padding: 16px 18px; border-radius: var(--r-md); }
  .motion .inst .scale, .motion .inst .note { display: none; }
  .motion .inst .reads { margin-top: 12px; }
  .motion .inst .read { padding: 10px 0; }
  .motion .inst .read .v { font-size: 1.75rem; }
  .motion .inst .read .pct { float: none; display: block; margin-top: 2px; }
  /* explore on a phone: title above the unit, numbered dots on it, the parts as a grid of buttons under it, details as a sheet */
  .motion .ex-head { top: calc(var(--nav-h) + 6px); text-align: left; }
  .motion .ex-head .label { margin-bottom: 6px; }
  .motion .ex-head .d2 { font-size: clamp(1.25rem, 5.9vw, 1.6rem); }
  .motion .ex-sub { margin-top: 4px; font-size: var(--fs-xs); }
  .ex-ui > svg { display: none; }
  .ex-lbs { inset: auto var(--pad) 84px var(--pad); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .ex-lb { position: static; min-width: 0; border-radius: 14px; }
  .ex-lb:last-child { grid-column: 1 / -1; }
  .ex-lb-in { display: flex; width: 100%; min-height: 48px; padding: 6px 12px; gap: 10px; border-radius: 14px; white-space: normal; text-align: left; font-size: .8125rem; line-height: 1.25; transform: translate3d(0, 10px, 0); }
  .ex-lb .t { flex: 1 1 auto; }
  .ex-dot i { inset: 5px; }
  .ex-dot b { display: block; position: absolute; inset: 0; font-size: .625rem; line-height: 22px; text-align: center; color: #fff; font-weight: 500; }
  .motion .part-panel { left: var(--pad); right: var(--pad); top: auto; bottom: 84px; width: auto; max-height: 54svh; padding: 18px 20px; border-radius: 22px; transform: translate3d(0, 24px, 0); }
  .motion .ch-explore.is-open .part-panel { transform: none; }
  .pp-top { margin-bottom: 12px; }
  .pp-body h3 { font-size: 1.5rem; }
  .pp-body .sum { font-size: var(--fs-sm); margin-top: 8px; }
  .pp-body .pf { margin-top: 12px; }
  .pp-body .pf > div { grid-template-columns: 6.6rem 1fr; font-size: var(--fs-xs); padding: 8px 0; }
  .pp-body .pp-alt { margin-top: 10px; }
  .pp-nav { margin-top: 2px; }
  .pp-nav .btn { min-height: 44px; }
  .motion .monitor { bottom: 16px; padding: 8px 14px 8px 12px; font-size: var(--fs-xs); left: auto; right: var(--pad); gap: 8px; }
  .motion .monitor .sep, .motion .monitor .sep + span { display: none; }
  .motion .scroll-cue, .motion .turn-hint, .motion .model-note { display: none; }
  .tag-tx { padding: 6px 10px; border-radius: 10px; }
  .tag-tx b { font-size: .8125rem; } .tag-tx small { display: none; }
}
@media (max-width: 560px) {
  :root { --nav-h: 64px; }
  .chart text { font-size: 19px; }
  .chart .ttl { font-size: 15px; }
  .chart .call text { font-size: 21px; }
  .chart .call .sub { display: none; }
  .brand svg { height: 25px; }
  .nav-cta .btn { min-height: 40px; padding: 0 15px; font-size: .875rem; }
  .nav-in { gap: 10px; }
  .btn { min-height: 50px; padding: 0 22px; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
  .steps4, .stage-list { grid-template-columns: minmax(0, 1fr); }
  .fact { grid-template-columns: 6.4rem 1fr; gap: 14px; }
  .fact dt { font-size: 1.5rem; white-space: nowrap; }
  .inst-main { grid-template-columns: minmax(0, 1fr); }
  .rotor { display: none; }
  .scale-row { grid-template-columns: 1fr; gap: 2px; }
  .form .two { grid-template-columns: minmax(0, 1fr); }
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case .stat { flex-wrap: wrap; }
  .dl > div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
}

/* ---------- reduced motion and the accessibility "pause motion" switch ---------- */
@media (prefers-reduced-motion: reduce) {
  .js [data-rv], .js .mask-line > span { opacity: 1 !important; transform: none !important; transition: none !important; }
  .js .chart .ln { stroke-dashoffset: 0 !important; transition: none !important; }
  .js .chart .call, .chart .area-a { opacity: 1 !important; transform: none !important; transition: none !important; }
  .scroll-cue i::after { animation: none !important; }
  .space img, .mark, .fill, .speeds .thumb { transition: none !important; }
}
html.aa-ax-still .scroll-cue i::after { animation: none !important; }

@media print { .nav, .air-canvas, .air-bg, .axb, .axm { display: none !important; } }