/* Product pages (Cooling · Heating · Air & light) — the D3 "In Your Hands" studio, extended to a whole family.
   Every product turns round as you scroll: each real angle swings in, then the next product swings in.
   Phones first: the product owns the upper half, its card docks low. */
.cat-page .thumb-cta, .thumb-cta[hidden] { display: none !important; }
.cat-world { position: relative; color: var(--ink); --bg1: #ffffff; --bg2: #eef1f7; --bg3: #e1e7f1; background: radial-gradient(90% 70% at 62% 50%, var(--bg1) 0%, var(--bg2) 55%, var(--bg3) 100%); }
.cat-world[data-cat="hot"] { --bg1: #fffdf8; --bg2: #f7efe4; --bg3: #ecdfcc; }
.cat-world[data-cat="air"] { --bg1: #ffffff; --bg2: #f1f2f5; --bg3: #e4e6ec; }
.cat-canvas { position: sticky; top: 0; height: 100vh; height: 100dvh; z-index: 0; overflow: hidden; }
.cat-canvas + .cat-hud + .beat { margin-top: -100vh; margin-top: -100dvh; }
.cat-canvas canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.cat-world .gl-fallback { display: none; }
.cat-world.no-gl .gl-fallback { display: grid; place-items: center; position: absolute; inset: 0; background: none; }
.cat-world.no-gl .gl-fallback img { width: min(50vw, 520px); height: auto; margin-left: 30vw; }

/* HUD: where am I in this family */
.cat-hud { position: fixed; left: var(--gutter); bottom: var(--space-6); z-index: 30; display: flex; align-items: center; gap: var(--space-4); padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4); border-radius: var(--radius-pill); background: color-mix(in oklab, var(--white) 86%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid color-mix(in oklab, var(--ink) 10%, transparent);
  font: 600 var(--text-xs)/1 var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); opacity: 0; visibility: hidden; transition: opacity var(--dur-slow) var(--ease-out), visibility 0s linear var(--dur-slow); }
.cat-hud.on { opacity: 1; visibility: visible; transition: opacity var(--dur-slow) var(--ease-out); }
.cat-hud b { color: var(--ink); font-variant-numeric: tabular-nums; }
.cat-hud [data-cat-name] { text-transform: none; letter-spacing: .01em; font-size: var(--text-sm); color: var(--ink); margin-left: var(--space-1); }
.cat-hud ol { display: flex; list-style: none; margin: 0; padding: 0; }
.cat-hud a { display: grid; place-items: center; width: 28px; height: var(--tap); }
.cat-hud a i { width: 7px; height: 7px; border-radius: 50%; background: color-mix(in oklab, var(--ink) 22%, transparent); transition: background-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out); }
.cat-hud a:hover i { background: var(--ink-2); }
.cat-hud li.on a i { background: var(--navy-700); transform: scale(1.4); }
.cat-world[data-cat="hot"] .cat-hud li.on a i { background: #a5560f; }
.cat-hud a:focus-visible { outline: 2px solid var(--blue-500); outline-offset: -4px; border-radius: 50%; }

/* beats */
.cat-world .beat { position: relative; z-index: 1; display: flex; align-items: center; pointer-events: none; min-height: 100vh; min-height: calc(190dvh + (var(--views, 1) - 1) * 55dvh); }
.cat-world .beat a { pointer-events: auto; }
.cat-world .beat-hero { min-height: 100vh; min-height: 100dvh; padding-top: var(--space-24); }
.cat-world .beat-card { position: sticky; top: calc(50dvh - 13rem); max-width: 26rem; pointer-events: auto; }
.cat-world .beat { align-items: stretch; padding-top: 32dvh; padding-bottom: 18dvh; }
.cat-world .beat > .wrap { display: flex; flex-direction: column; }
.cat-world .beat-hero { align-items: center; padding-top: var(--space-24); padding-bottom: 0; }
.cat-world .beat-hero > .wrap { display: block; }
.cat-world .beat.right .beat-card { margin-left: auto; margin-right: var(--space-12); }
.cat-world .hero-h { font-size: clamp(2.6rem, 1rem + 5.4vw, 6rem); line-height: .98; letter-spacing: -.045em; margin: var(--space-6) 0; max-width: 11ch; color: var(--ink); text-wrap: balance; }
.cat-world .lede { max-width: 34ch; color: var(--ink-2); }
.cat-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); list-style: none; margin: var(--space-8) 0 0; padding: 0; max-width: 36rem; }
.cat-chips a { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 var(--space-4); border-radius: var(--radius-pill); border: 1px solid color-mix(in oklab, var(--ink) 16%, transparent); background: color-mix(in oklab, var(--white) 70%, transparent); color: var(--ink); text-decoration: none; font: 500 var(--text-sm)/1 var(--font-body); transition: border-color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out); }
.cat-chips a:hover { border-color: var(--navy-700); background: var(--white); }
.beat-num { font: 600 var(--text-xs)/1.4 var(--font-body); letter-spacing: .16em; text-transform: uppercase; color: var(--blue-500); }
.cat-world[data-cat="hot"] .beat-num { color: #a5560f; }
.cat-world .beat h2 { font-size: var(--text-4xl); line-height: 1.04; letter-spacing: -.035em; margin: var(--space-3) 0 var(--space-3); color: var(--ink); text-wrap: balance; }
.cat-world .beat p { color: var(--ink-2); text-wrap: pretty; }
.beat-views { font: 600 var(--text-xs)/1.6 var(--font-body); letter-spacing: .08em; text-transform: uppercase; margin: var(--space-4) 0 0; color: color-mix(in oklab, var(--ink-2) 70%, transparent) !important; }
.beat-views span { transition: color var(--dur) var(--ease-out); }
.beat-views span.on { color: var(--ink); }
.beat-facts { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4) var(--space-6); margin: var(--space-5) 0 var(--space-6); }
.beat-facts div { border-top: 1px solid color-mix(in oklab, var(--ink) 12%, transparent); padding-top: var(--space-2); }
.beat-facts dt { font-size: var(--text-xs); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }
.beat-facts dd { margin: var(--space-1) 0 0; font: 500 var(--text-lg)/1.2 var(--font-display); color: var(--navy-700); font-variant-numeric: tabular-nums; }

/* the rest of the range */
.cat-next { padding: var(--sec) 0; background: #0a0f1c; }
.cat-next h2 { font-size: clamp(2.2rem, 1rem + 4vw, 4rem); color: var(--white); margin: var(--space-4) 0 var(--space-10); }
.cat-cards { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-10); }
.cat-card { display: grid; gap: var(--space-2); align-content: end; min-height: 280px; padding: var(--space-6); border-radius: var(--radius-sm); border: 1px solid var(--line); background: radial-gradient(80% 70% at 70% 30%, #16264a 0%, #0d162c 70%); color: var(--white); text-decoration: none; position: relative; overflow: hidden; transition: border-color var(--dur) var(--ease-out); }
.cat-card img { position: absolute; right: 6%; top: 8%; width: auto; height: 52%; max-width: 50%; object-fit: contain; transition: transform 600ms var(--ease-out); }
.cat-card:hover { border-color: color-mix(in oklab, var(--ice) 50%, transparent); }
.cat-card:hover img { transform: translateY(-6px) rotate(-2deg); }
.cat-card b { font: 400 var(--text-3xl)/1.05 var(--font-display); letter-spacing: -.03em; }
.cat-card em { font-style: normal; color: var(--steel-300); font-size: var(--text-sm); }

@media (max-width: 760px), (max-aspect-ratio: 9/10) {
  .cat-hud { left: 50%; right: auto; bottom: auto; top: calc(var(--nav-h, 64px) + var(--space-2)); transform: translateX(-50%); padding: var(--space-1) var(--space-1) var(--space-1) var(--space-4); white-space: nowrap; }
  .cat-hud a { width: 22px; }
  .cat-world .beat { padding-top: 0; padding-bottom: 0; }
  .cat-world .beat > .wrap { justify-content: flex-end; }
  .cat-world .beat-hero { align-items: flex-start; padding-top: calc(var(--space-20) + var(--space-4)); }
  .cat-world .hero-h { font-size: clamp(2.3rem, 1.1rem + 7vw, 3.4rem); margin: var(--space-3) 0; }
  .cat-world .lede { font-size: var(--text-base); }
  .cat-chips { margin-top: var(--space-5); }
  .cat-chips a { min-height: 40px; padding: 0 var(--space-3); font-size: var(--text-xs); }
  .cat-world .beat-card { top: auto; bottom: 0; position: sticky; margin: 0 calc(var(--gutter) * -1); max-width: none; padding: var(--space-5) var(--gutter) calc(var(--space-5) + env(safe-area-inset-bottom, 0px)); background: color-mix(in oklab, var(--white) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-top: 1px solid color-mix(in oklab, var(--ink) 10%, transparent); }
  .cat-world .beat .beat-card, .cat-world .beat.right .beat-card { margin: 0 calc(var(--gutter) * -1); }
  .cat-world .beat h2 { font-size: var(--text-3xl); margin: var(--space-1) 0 var(--space-2); }
  .cat-world .beat-card > p:not(.beat-num):not(.beat-views) { font-size: var(--text-sm); }
  .beat-facts { margin: var(--space-3) 0 var(--space-4); gap: var(--space-3) var(--space-4); }
  .beat-facts dd { font-size: var(--text-base); }
  .cat-world .beat-card .btn { width: 100%; }
  .cat-cards { grid-template-columns: 1fr; }
  .cat-card { min-height: 220px; }
}
@media (max-aspect-ratio: 9/10) and (max-height: 700px) {
  .cat-world .beat-card > p:not(.beat-num):not(.beat-views) { display: none; }
}
@media (max-aspect-ratio: 9/10) and (min-width: 700px) {
  .cat-world .beat-card { padding-inline: var(--space-12); }
  .cat-world .beat-card .btn { width: auto; }
  .beat-facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* v6: technical specs + PDF on every product */
.beat-cta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); }
.spec-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-height: var(--cta-h); padding: 0 var(--space-5); border-radius: var(--radius-pill);
  border: 1px solid color-mix(in oklab, var(--ink) 22%, transparent); background: color-mix(in oklab, var(--white) 70%, transparent); color: var(--ink); font: 600 var(--text-sm)/1 var(--font-body); cursor: pointer;
  transition: border-color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out); }
.spec-btn:hover { border-color: var(--navy-700); background: var(--white); }
.spec-btn svg { width: 18px; height: 18px; }
.spec-dlg { width: min(640px, calc(100% - 2 * var(--gutter))); max-height: min(86dvh, 820px); padding: 0; border: 0; border-radius: 14px; background: var(--white); color: var(--ink); box-shadow: 0 30px 80px -20px rgb(7 13 26 / .45); overscroll-behavior: contain; }
.spec-dlg::backdrop { background: rgb(7 13 26 / .55); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.spec-dlg[open] { animation: spec-in 320ms var(--ease-out); }
@keyframes spec-in { from { opacity: 0; transform: translateY(16px); } }
.spec-in { display: flex; flex-direction: column; max-height: inherit; }
.spec-dlg header { position: relative; padding: var(--space-6) var(--space-16) var(--space-4) var(--space-6); border-bottom: 1px solid color-mix(in oklab, var(--ink) 10%, transparent); }
.spec-dlg h2 { font-size: var(--text-2xl); letter-spacing: -.025em; line-height: 1.1; margin-top: var(--space-2); }
.spec-x { position: absolute; right: var(--space-3); top: var(--space-3); width: var(--tap); height: var(--tap); border: 0; border-radius: 50%; background: color-mix(in oklab, var(--ink) 6%, transparent); color: var(--ink); font-size: 1.6rem; line-height: 1; cursor: pointer; }
.spec-body { overflow: auto; padding: var(--space-2) var(--space-6) var(--space-4); }
.spec-body h3 { font: 600 var(--text-xs)/1.4 var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--blue-500); margin: var(--space-5) 0 var(--space-1); }
.cat-world[data-cat="hot"] ~ .spec-dlg .spec-body h3 { color: #a5560f; }
.spec-body dl { margin: 0; }
.spec-body dl div { display: grid; grid-template-columns: 11rem 1fr; gap: var(--space-4); padding: var(--space-2) 0; border-top: 1px solid color-mix(in oklab, var(--ink) 10%, transparent); font-size: var(--text-sm); }
.spec-body dt { color: var(--ink-2); }
.spec-body dd { margin: 0; font-weight: 600; }
.spec-miss { margin-top: var(--space-5); font-size: var(--text-xs); color: #9a2b1b; }
.spec-dlg footer { padding: var(--space-4) var(--space-6) calc(var(--space-4) + env(safe-area-inset-bottom, 0px)); border-top: 1px solid color-mix(in oklab, var(--ink) 10%, transparent); }
.spec-dlg footer .btn { width: 100%; }
@media (max-width: 760px), (max-aspect-ratio: 9/10) {
  .beat-cta { flex-wrap: nowrap; }
  .cat-world .beat-card .beat-cta .btn { flex: 1 1 auto; width: auto; padding: 0 var(--space-4); }
  .spec-btn { flex: 0 0 auto; padding: 0 var(--space-4); }
  .spec-long { display: none; }
  .spec-dlg { width: 100%; max-width: none; margin: auto 0 0; border-radius: 16px 16px 0 0; max-height: 88dvh; }
  @keyframes spec-in { from { transform: translateY(40px); opacity: 0; } }
  .spec-body dl div { grid-template-columns: 8.5rem 1fr; }
}