/* Feature case studies (Roborock, Momenta) — shared layer on top of site.css.
   Each page sets its brand tokens on .cf-<brand>; components only read --brand / --brand-2. */
.cf-roborock { --brand: #EC0028; --brand-2: #A5BDDE; --graphite: #313142; --graphite-2: #0B0B10; --metal: #9C9C9C; --techwhite: #F1F5F8; }
.cf-momenta { --brand: #0266E9; --brand-2: #0850FC; --brand-3: #1849C7; --ice: #E2EDFE; --mist: #F2F5FD; }
.cf .s-graphite { --bg: #0B0B10; --fg: #F1F5F8; --muted: rgba(241, 245, 248, .62); --rule: rgba(241, 245, 248, .12); --raise: #17171F; --accent: var(--brand);
  background: radial-gradient(120% 70% at 50% 0%, #26262F 0%, #0B0B10 55%, #050507 100%); color: var(--fg); }
.cf .s-ice { --bg: #F2F5FD; --fg: #0B1A3A; --muted: rgba(11, 26, 58, .64); --rule: rgba(11, 26, 58, .12); --raise: #FFFFFF; --accent: var(--brand);
  background: linear-gradient(180deg, #E8F0FF 0%, #F6F9FF 60%, #FFFFFF 100%); color: var(--fg); }
.cf .s-blue { --bg: #0266E9; --fg: #FFFFFF; --muted: rgba(255, 255, 255, .78); --rule: rgba(255, 255, 255, .24); --raise: #1849C7; --accent: #FFFFFF; background: var(--bg); color: var(--fg); }
.cf .eyebrow::before { background: var(--accent); }
.cf .s-paper, .cf .s-ink { --accent: var(--brand); }
.cf-momenta .s-ink { --accent: #5B9BFF; }

/* ---------- shared ---------- */
.cf figure { margin: 0; }
.cf-overview { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(40px, 6vw, 120px); align-items: start; }
.cf-overview .statement { font-size: clamp(1.7rem, 3.2vw, 3rem); }
.cf-overview .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
@media (max-width: 900px) { .cf-overview { grid-template-columns: 1fr; } }
.cf-figs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: clamp(56px, 7vw, 110px); border-top: 1px solid var(--rule); }
.cf-fig { display: grid; gap: 6px; padding: 22px 20px 0 0; }
.cf-fig b { font-family: var(--f-display); font-size: clamp(2rem, 4.2vw, 4.2rem); line-height: 1; letter-spacing: -.02em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.cf-fig b em { font-style: normal; color: var(--accent); }
.cf-fig > span { color: var(--muted); font-size: .92rem; }
@media (max-width: 760px) { .cf-figs { grid-template-columns: 1fr 1fr; row-gap: 22px; } }
.cf-note { margin-top: 18px; font-size: .84rem; color: var(--muted); max-width: 60em; }
.cf-shot { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #000; border-radius: 0 0 var(--arc) 0; }
.cf-shot img { width: 100%; height: 100%; object-fit: cover; }
.cf-shot figcaption, .cf-cap { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.cf-row { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 5vw, 96px); align-items: center; }
.cf-row--flip { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.cf-row--flip > :first-child { order: 2; }
@media (max-width: 900px) { .cf-row, .cf-row--flip { grid-template-columns: 1fr; } .cf-row--flip > :first-child { order: 0; } }
.cf-decision { display: grid; gap: 14px; }
.cf-decision__tag { display: inline-flex; align-items: center; gap: 10px; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.cf-decision__tag::before { content: ""; width: 22px; height: 2px; background: currentColor; }

.cf-palette { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: clamp(8px, 1vw, 14px); }
.cf-sw { display: grid; grid-template-rows: 150px auto; border-radius: 0 0 20px 0; overflow: hidden; background: var(--raise); transition: transform .5s var(--ease); }
.cf-sw:hover { transform: translateY(-6px); }
.cf-sw__c { background: var(--c); position: relative; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .06); }
.cf-sw__c small { position: absolute; left: 14px; bottom: 12px; font-family: var(--f-mono); font-size: .7rem; letter-spacing: .06em; color: var(--t, #fff); }
.cf-sw__b { padding: 14px 16px 18px; display: grid; gap: 6px; }
.cf-sw__b b { font-weight: 600; }
.cf-sw__b span { font-size: .86rem; color: var(--muted); line-height: 1.45; }
@media (max-width: 900px) { .cf-palette { grid-template-columns: repeat(2, minmax(0, 1fr)); } .cf-sw { grid-template-rows: 100px auto; } }

.cf-live { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(10px, 1.4vw, 20px); align-items: start; }
.cf-live__col { display: grid; gap: clamp(10px, 1.4vw, 20px); }
.cf-live__col figure { margin: 0; overflow: hidden; background: #0E1430; }
.cf-live__col img { width: 100%; height: auto; }
.cf-live__col:nth-child(2) { margin-top: 14vh; }
.cf-live__col:nth-child(3) { margin-top: 5vh; }
@media (max-width: 900px) { .cf-live { grid-template-columns: 1fr 1fr; } .cf-live__col:nth-child(3) { display: none; } .cf-live__col:nth-child(2) { margin-top: 8vh; } }

/* ================= Roborock ================= */
/* hero: the opening slide fills the screen, then settles into a card */
.rb-hero { position: relative; height: 100svh; min-height: 600px; }
.rb-hero.is-scrub { height: 230vh; }
.rb-hero__pin { position: sticky; top: 0; height: 100svh; min-height: 600px; overflow: hidden;
  background: radial-gradient(110% 80% at 50% 0%, #313142 0%, #0B0B10 55%, #000 100%); }
.rb-hero__card { position: absolute; left: 50%; top: 58%; width: min(74vw, 1120px, calc((100svh - 360px) * 1.7778)); aspect-ratio: 16 / 9; transform: translate(-50%, calc(-50% + var(--ty, 0px))) scale(var(--s, 1)); transform-origin: 50% 50%;
  border-radius: 0 0 calc(var(--arc) / var(--s, 1)) 0; overflow: hidden; background: #000; box-shadow: 0 70px 140px -50px rgba(236, 0, 40, .45); will-change: transform; }
.rb-hero__card img { width: 100%; height: 100%; object-fit: cover; }
.rb-hero__card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.82) 0%, rgba(0,0,0,.35) 40%, rgba(0,0,0,.2) 62%, rgba(0,0,0,.7) 100%); opacity: var(--shade, 0); }
.rb-hero__top { position: absolute; left: 0; right: 0; top: clamp(96px, 12vh, 140px); z-index: 2; display: grid; gap: 16px; }
.rb-hero__title { font-size: clamp(2.3rem, 4.8vw, 5.2rem); line-height: .98; letter-spacing: -.035em; font-weight: 600; font-variation-settings: "wdth" 106; max-width: 13em; }
.rb-hero__title em { font-style: normal; color: var(--brand); }
.rb-hero__bottom { position: absolute; left: 0; right: 0; bottom: calc(22px + env(safe-area-inset-bottom, 0px)); z-index: 2; }
.cf-meta { display: flex; flex-wrap: wrap; gap: 10px 34px; padding-top: 16px; border-top: 1px solid rgba(241, 245, 248, .16); }
.cf-meta span { display: grid; gap: 2px; }
.cf-meta b { font-family: var(--f-display); font-size: clamp(1rem, 1.5vw, 1.3rem); font-weight: 800; }
.cf-meta small { font-family: var(--f-mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; opacity: .62; }
@media (max-width: 700px) { .rb-hero__card { width: 92vw; top: 60%; } }

/* converge diagram: four inputs, one story */
.rb-converge { width: 100%; height: auto; overflow: visible; margin-top: clamp(32px, 4vw, 64px); }
.rb-converge text { font-family: var(--f-sans); font-size: 15px; fill: var(--fg); }
.rb-converge .lbl-s { font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em; fill: var(--muted); }
.rb-converge path.ln { fill: none; stroke: rgba(241, 245, 248, .28); stroke-width: 1.5; }
.rb-converge path.ln-hot { fill: none; stroke: var(--brand); stroke-width: 2.5; }
.rb-converge circle.node { fill: #0B0B10; stroke: rgba(241, 245, 248, .5); stroke-width: 1.5; }
.rb-converge circle.out { fill: var(--brand); }

/* story spine (pinned) */
.rb-story { position: relative; }
.rb-story.is-scrub { height: calc(100svh + 5 * 62vh); }
.rb-story__pin { position: relative; }
.rb-story.is-scrub .rb-story__pin { position: sticky; top: 0; height: 100svh; display: grid; align-items: center; overflow: hidden; }
.rb-story__grid { display: grid; grid-template-columns: minmax(0, 4.6fr) minmax(0, 7.4fr); gap: clamp(28px, 4vw, 80px); align-items: center; padding-block: clamp(80px, 9vh, 120px) 40px; }
.rb-steps { position: relative; display: grid; gap: 0; margin-top: 28px; padding-left: 26px; }
.rb-steps__rail { position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px; background: var(--rule); }
.rb-steps__rail i { position: absolute; inset: 0; background: var(--brand); transform-origin: top; transform: scaleY(var(--p, 0)); box-shadow: 0 0 12px var(--brand); }
.rb-step { position: relative; display: grid; gap: 4px; padding: 9px 0; opacity: .38; transition: opacity .5s var(--ease); }
.rb-step::before { content: ""; position: absolute; left: -31px; top: 19px; width: 12px; height: 12px; background: #0B0B10; box-shadow: inset 0 0 0 2px var(--rule); transition: background .4s, box-shadow .4s; }
.rb-step b { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .12em; color: var(--brand); }
.rb-step h3 { font-size: clamp(1.1rem, 1.6vw, 1.45rem); font-weight: 600; letter-spacing: -.01em; }
.rb-step p { color: var(--muted); font-size: .94rem; max-height: 0; overflow: hidden; transition: max-height .6s var(--ease); }
.rb-step.is-on { opacity: 1; }
.rb-step.is-on::before, .rb-step.is-past::before { background: var(--brand); box-shadow: none; }
.rb-step.is-on p { max-height: 6em; }
.rb-step__img { display: none; }
.no-js .rb-step { opacity: 1; }
.no-js .rb-step p { max-height: none; }
.no-js .rb-step__img { display: block; }
.no-js .rb-screen-wrap { display: none; }
@media (prefers-reduced-motion: reduce) {
  .rb-step { opacity: 1; }
  .rb-step p { max-height: none; }
  .rb-step__img { display: block; }
  .rb-screen-wrap { display: none; }
}
.rb-screen { position: relative; aspect-ratio: 16 / 9; border-radius: 0 0 var(--arc) 0; overflow: hidden; background: #000; box-shadow: 0 60px 120px -50px rgba(236, 0, 40, .4), 0 0 0 1px rgba(255,255,255,.06); }
.rb-screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: scale(1.03); transition: opacity .8s var(--ease), transform 1.6s var(--ease); }
.rb-screen img.is-on { opacity: 1; transform: none; }
.rb-screen-wrap { display: grid; gap: 14px; }
.rb-screen__label { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--brand); }
.rb-story .h2 { font-size: clamp(1.8rem, 3.2vw, 3.2rem); }
@media (max-width: 900px) {
  .rb-story.is-scrub { height: auto; }
  .rb-story.is-scrub .rb-story__pin { position: relative; height: auto; }
  .rb-story__grid { grid-template-columns: 1fr; }
  .rb-screen-wrap { display: none; }
  .rb-step { opacity: 1; padding: 18px 0; }
  .rb-step p { max-height: none; }
  .rb-step__img { display: block; margin-top: 12px; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 0 0 20px 0; }
  .rb-step__img img { width: 100%; height: 100%; object-fit: cover; }
  .rb-step::before { background: var(--brand); box-shadow: none; }
}

.rb-styles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(10px, 1.4vw, 20px); margin-top: clamp(32px, 4vw, 56px); }
.rb-styles figure { margin: 0; display: grid; gap: 10px; }
.rb-styles .cf-shot { border-radius: 0 0 18px 0; }
.rb-styles figcaption b { display: block; font-weight: 600; font-size: 1rem; color: var(--fg); text-transform: none; letter-spacing: 0; font-family: var(--f-sans); }
@media (max-width: 900px) { .rb-styles { grid-template-columns: 1fr 1fr; } }

/* ================= Momenta ================= */
/* hero: brand-blue hall, a big stage screen that zooms forward until it fills the view */
.mo-hero { position: relative; height: 100svh; min-height: 620px; }
.mo-hero.is-scrub { height: 240vh; }
.mo-hero__pin { position: sticky; top: 0; height: 100svh; min-height: 620px; overflow: hidden; background: #021A55; color: #fff; perspective: 1800px; }
.mo-hero__bg { position: absolute; inset: -4%; will-change: transform; }
.mo-hero__bg img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.15) brightness(.9); }
.mo-hero__tint { position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 55% at 50% 72%, rgba(8, 80, 252, .55), transparent 70%),
    linear-gradient(180deg, rgba(2, 26, 85, .86) 0%, rgba(2, 50, 160, .4) 42%, rgba(2, 26, 85, .9) 100%); }
.mo-hero__bg::after { content: ""; position: absolute; inset: 0; background: #0266E9; mix-blend-mode: multiply; }
.mo-hero__streaks { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.mo-hero__streaks i { position: absolute; height: 1.5px; width: 40vw; left: -40vw; border-radius: 2px; background: linear-gradient(90deg, transparent, rgba(160, 200, 255, .9), transparent); animation: streak 5s linear infinite; }
.mo-hero__streaks i:nth-child(1) { top: 18%; animation-delay: 0s; }
.mo-hero__streaks i:nth-child(2) { top: 41%; animation-delay: -1.7s; width: 26vw; }
.mo-hero__streaks i:nth-child(3) { top: 64%; animation-delay: -3.4s; }
.mo-hero__streaks i:nth-child(4) { top: 88%; animation-delay: -.8s; width: 18vw; }
.mo-hero__streaks i:nth-child(5) { top: 30%; animation-delay: -2.6s; width: 34vw; animation-duration: 7s; }
@keyframes streak { to { transform: translateX(150vw); } }
.mo-hero__top { position: absolute; left: 0; right: 0; top: clamp(96px, 12vh, 140px); z-index: 3; display: grid; gap: 16px; }
.mo-hero .crumbs, .mo-hero .eyebrow { color: rgba(255, 255, 255, .72); }
.mo-hero .eyebrow::before { background: #7FB2FF; }
.mo-hero__title { font-size: clamp(2.4rem, 4.7vw, 5.6rem); line-height: .96; letter-spacing: -.04em; font-weight: 600; font-variation-settings: "wdth" 108; max-width: none; text-wrap: balance; }
.mo-hero__title em { font-style: normal; color: #7FB2FF; }
.mo-screen { position: absolute; left: 50%; top: 64%; z-index: 2; width: min(56vw, 1040px, calc((100svh - 380px) * 1.7778)); aspect-ratio: 16 / 9; border-radius: 6px; overflow: hidden; background: #0266E9;
  transform: translate(-50%, calc(-50% + var(--ty, 0px))) scale(var(--s, 1)) rotateX(var(--rx, 0deg)); transform-origin: 50% 50%;
  box-shadow: 0 0 0 1px rgba(160, 200, 255, .35), 0 40px 120px -20px rgba(8, 80, 252, .9), 0 0 160px rgba(8, 80, 252, .45); will-change: transform; }
.mo-screen img { width: 100%; height: 100%; object-fit: cover; }
.mo-reflect { position: absolute; left: 50%; top: calc(64% + min(56vw, 1040px, calc((100svh - 380px) * 1.7778)) * .5625 / 2 + 8px); z-index: 1; width: min(56vw, 1040px, calc((100svh - 380px) * 1.7778));
  height: 90px; transform: translateX(-50%); overflow: hidden; opacity: .3; filter: blur(3px);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent); mask-image: linear-gradient(180deg, #000, transparent); }
.mo-reflect img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transform: scaleY(-1); transform-origin: top; }
.mo-hero__bottom { position: absolute; left: 0; right: 0; bottom: calc(22px + env(safe-area-inset-bottom, 0px)); z-index: 3; }
.mo-hero .cf-meta { border-top-color: rgba(255, 255, 255, .2); }
@media (max-width: 700px) {
  .mo-screen, .mo-reflect { width: 92vw; }
  .mo-screen { top: 60%; }
  .mo-reflect { display: none; }
}

/* three layers of the talk */
.mo-layers { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 32px); margin-top: clamp(40px, 5vw, 72px); }
.mo-layers svg.mo-layers__line { position: absolute; left: 0; right: 0; top: 34px; width: 100%; height: 4px; overflow: visible; }
.mo-layer { position: relative; display: grid; gap: 12px; padding-top: 70px; }
.mo-layer__dot { position: absolute; top: 18px; left: 0; width: 36px; height: 36px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 2px var(--brand), 0 10px 26px rgba(2, 102, 233, .3); display: grid; place-items: center; font-family: var(--f-mono); font-size: .72rem; color: var(--brand); }
.mo-layer p { color: var(--muted); }
@media (max-width: 760px) { .mo-layers { grid-template-columns: 1fr; } .mo-layers svg.mo-layers__line { display: none; } }

/* slide navigator (pinned horizontal) */
.mo-track { position: relative; }
.mo-track.is-scrub { height: var(--h, 400vh); }
.mo-track__pin { position: relative; }
.mo-track.is-scrub .mo-track__pin { position: sticky; top: 0; height: 100svh; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1fr); align-content: center; gap: clamp(20px, 3vh, 36px); }
.mo-track .h2 { font-size: clamp(1.8rem, 3vw, 3rem); }
.mo-track__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 20px; }
.mo-track__row { width: max-content; display: flex; gap: clamp(16px, 2vw, 32px); padding-inline: max(var(--gutter), calc((100vw - min(52vw, 820px, calc((100svh - 380px) * 1.7778))) / 2)); will-change: transform; }
.mo-card { flex: none; width: min(52vw, 820px, calc((100svh - 380px) * 1.7778)); display: grid; gap: 12px; transform-origin: 50% 50%; transition: opacity .3s; }
.mo-card__screen { aspect-ratio: 16 / 9; overflow: hidden; border-radius: 6px; background: #E2EDFE; box-shadow: 0 30px 70px -30px rgba(2, 102, 233, .45), 0 0 0 1px rgba(2, 102, 233, .12); }
.mo-card__screen img { width: 100%; height: 100%; object-fit: cover; }
.mo-card__cap { display: flex; gap: 14px; align-items: baseline; }
.mo-card__cap b { font-family: var(--f-mono); font-size: .74rem; letter-spacing: .1em; color: var(--brand); }
.mo-card__cap span { font-weight: 600; }
.mo-nav { display: flex; gap: 6px; align-items: center; justify-content: center; }
.mo-nav i { width: 26px; height: 3px; background: var(--rule); transition: background .3s, width .3s; }
.mo-nav i.is-on { background: var(--brand); width: 46px; }
@media (max-width: 900px) {
  .mo-track.is-scrub { height: auto; }
  .mo-track.is-scrub .mo-track__pin { position: relative; height: auto; }
  .mo-track__row { width: auto; flex-direction: column; padding-inline: var(--gutter); transform: none !important; }
  .mo-card { width: 100%; transform: none !important; opacity: 1 !important; }
  .mo-nav { display: none; }
}

/* diagram types */
.mo-diag { display: grid; gap: clamp(56px, 7vw, 110px); margin-top: clamp(40px, 5vw, 72px); }
.mo-diag__glyph { width: 64px; height: 64px; }
.mo-diag__glyph svg { width: 100%; height: 100%; overflow: visible; }
.mo-diag__glyph .g { fill: none; stroke: var(--brand); stroke-width: 3; stroke-linecap: round; }
.mo-diag__glyph .g2 { fill: none; stroke: #9DB9F5; stroke-width: 3; stroke-linecap: round; }
.mo-diag__glyph .spin { transform-origin: 32px 32px; animation: spin 6s linear infinite; }
.mo-diag__glyph .draw { stroke-dasharray: 160; stroke-dashoffset: 160; animation: drawline 3.2s var(--ease) infinite; }
@keyframes drawline { 0% { stroke-dashoffset: 160; } 55%, 100% { stroke-dashoffset: 0; } }
.mo-diag .cf-shot { border-radius: 6px; background: #E2EDFE; box-shadow: 0 30px 70px -30px rgba(2, 102, 233, .4); }

.mo-focus { position: relative; }
.mo-focus .cf-shot { border-radius: 6px; }

/* Show every slide when scroll-driven navigation is inactive. */
.mo-track:not(.is-scrub) .mo-track__row { width: auto; flex-direction: column; padding-inline: var(--gutter); transform: none !important; }
.mo-track:not(.is-scrub) .mo-card { width: min(100%, 1100px); margin-inline: auto; transform: none !important; opacity: 1 !important; }
.mo-track:not(.is-scrub) .mo-nav { display: none; }