:root {
  --bg: #000;
  --panel: rgba(22, 22, 22, .55);
  --fg: #fff;
  --muted: rgba(255, 255, 255, .62);
  --faint: rgba(255, 255, 255, .14);
  --accent: #f5a623;
  --sage: #b7b7a4;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --ease-io: cubic-bezier(.77, 0, .18, 1);
  --pad-x: clamp(20px, 7vw, 140px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: Poppins, system-ui, sans-serif;
  font-weight: 300;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

em { font-style: normal; color: var(--accent); }
strong { font-weight: 500; color: var(--fg); }

/* ---------- Atmosphere ---------- */
#field { position: fixed; inset: 0; z-index: 0; display: block; }

.grain {
  position: fixed; inset: -50%; z-index: 1; pointer-events: none; opacity: .06;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 1s steps(6) infinite;
}
@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); }
  60% { transform: translate(-2%, -1%); }
  80% { transform: translate(3%, 3%); }
}

.vignette {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, .8) 100%);
}

/* viewfinder corners, borrowed from the LND DEEP mark */
.corners, .frame {
  --c: rgba(255, 255, 255, .35); --l: 22px; --t: 1.5px;
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(var(--c), var(--c)) top left / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) top left / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) top right / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) top right / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) bottom left / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) bottom left / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) bottom right / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) bottom right / var(--t) var(--l);
  background-repeat: no-repeat;
}
.frame {
  position: fixed; inset: 18px; z-index: 3; --l: 28px;
  opacity: 0; transform: scale(1.04);
  transition: opacity 1.4s var(--ease) .2s, transform 1.6s var(--ease) .2s;
}
body.ready .frame { opacity: 1; transform: none; }

/* scanning line on every transition */
.scan {
  position: fixed; left: 0; right: 0; top: 0; height: 2px; z-index: 6; pointer-events: none;
  background: var(--accent); opacity: 0;
  box-shadow: 0 0 16px 2px var(--accent), 0 0 70px 8px rgba(245, 166, 35, .35);
}
.scan::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 30vh;
  background: linear-gradient(to top, rgba(245, 166, 35, .14), transparent);
}
.scan.rev::after { bottom: auto; top: 2px; background: linear-gradient(to bottom, rgba(245, 166, 35, .14), transparent); }
.scan.run { animation: scan 1s var(--ease-io) forwards; }
.scan.rev.run { animation-name: scanRev; }
@keyframes scan { 0% { transform: translateY(-2vh); opacity: 1; } 85% { opacity: 1; } 100% { transform: translateY(102vh); opacity: 0; } }
@keyframes scanRev { 0% { transform: translateY(102vh); opacity: 1; } 85% { opacity: 1; } 100% { transform: translateY(-2vh); opacity: 0; } }

.cursor {
  position: fixed; left: 0; top: 0; width: 38px; height: 38px; margin: -19px 0 0 -19px; z-index: 9;
  border: 1px solid rgba(255, 255, 255, .45); border-radius: 50%; pointer-events: none;
  transition: width .3s var(--ease), height .3s var(--ease), margin .3s var(--ease), border-color .3s, background .3s;
  opacity: 0;
}
.cursor.on { opacity: 1; }
.cursor.hover { width: 70px; height: 70px; margin: -35px 0 0 -35px; border-color: var(--accent); background: rgba(245, 166, 35, .06); }
@media (hover: none) { .cursor { display: none; } }

/* ---------- Bars ---------- */
.topbar, .bottombar {
  position: fixed; left: 0; right: 0; z-index: 8;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 0 calc(var(--pad-x) * .5);
  opacity: 0; transition: opacity 1.2s var(--ease) .6s, transform 1.2s var(--ease) .6s;
}
.topbar { top: 0; height: 92px; transform: translateY(-20px); }
.bottombar { bottom: 0; height: 80px; transform: translateY(20px); }
body.ready .topbar, body.ready .bottombar { opacity: 1; transform: none; }

.logo svg { height: 24px; width: auto; display: block; }
.section-name {
  font-size: 12px; font-weight: 500; letter-spacing: .32em; text-transform: uppercase; color: var(--muted);
  overflow: hidden; height: 18px;
}
.section-name span { display: inline-block; transition: transform .5s var(--ease), opacity .5s; }
.section-name span.out { transform: translateY(-110%); opacity: 0; }
.section-name span.in { transform: translateY(110%); opacity: 0; transition: none; }

.btn {
  justify-self: end; font: inherit; font-size: 12px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: var(--fg); background: transparent; border: 1px solid rgba(255, 255, 255, .7);
  padding: 11px 18px; cursor: pointer; display: inline-flex; gap: 14px; align-items: center;
  transition: background .3s, color .3s, border-color .3s;
}
.btn:hover { background: var(--fg); color: #000; }
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover .arr { transform: translate(3px, -3px); }

.hint { font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: rgba(255, 255, 255, .4); }
.dots { display: flex; gap: 10px; }
.dots button {
  width: 34px; height: 18px; background: none; border: 0; cursor: pointer; position: relative;
}
.dots button::before {
  content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 2px; background: rgba(255, 255, 255, .25);
  transition: background .4s, transform .4s var(--ease);
}
.dots button:hover::before { background: rgba(255, 255, 255, .6); }
.dots button.active::before { background: var(--accent); transform: scaleY(1.5); }

.counter { justify-self: end; display: flex; align-items: center; gap: 14px; font-size: 12px; font-weight: 500; letter-spacing: .15em; }
.counter #tot { color: rgba(255, 255, 255, .4); }
.counter .bar { width: 90px; height: 1px; background: rgba(255, 255, 255, .2); position: relative; overflow: hidden; }
.counter .bar i { position: absolute; inset: 0; background: var(--accent); transform-origin: left; transform: scaleX(.25); transition: transform 1s var(--ease); }

/* ---------- Slides ---------- */
.deck { position: fixed; inset: 0; z-index: 4; }
.slide {
  position: absolute; inset: 0; visibility: hidden; pointer-events: none;
  padding: 120px var(--pad-x) 100px;
}
.slide.active { visibility: visible; pointer-events: auto; }
.slide.leaving { visibility: visible; }

/* generic reveal */
[data-anim] {
  opacity: 0; transform: translateY(40px); filter: blur(10px);
  transition: opacity .9s var(--ease), transform 1.2s var(--ease), filter .9s var(--ease);
  transition-delay: var(--d, 0s);
}
.active [data-anim] { opacity: 1; transform: none; filter: blur(0); }
.leaving [data-anim] {
  opacity: 0; transform: translateY(-30px); filter: blur(8px);
  transition-duration: .45s; transition-timing-function: ease-in; transition-delay: calc(var(--d, 0s) * .12);
}

[data-anim="flip"] { transform: perspective(1200px) translateY(90px) rotateX(38deg) scale(.92); }
.leaving [data-anim="flip"] { transform: perspective(1200px) translateY(-40px) rotateX(-20deg) scale(.96); }

[data-anim="mask"], .active [data-anim="mask"], .leaving [data-anim="mask"] { opacity: 1; transform: none; filter: none; overflow: hidden; }
[data-anim="mask"] > span { display: inline-block; transform: translateY(110%); transition: transform 1.2s var(--ease) var(--d, 0s); }
.active [data-anim="mask"] > span { transform: none; }
.leaving [data-anim="mask"] > span { transform: translateY(-110%); transition-duration: .5s; transition-delay: 0s; }

/* split characters */
[data-split] { perspective: 800px; }
[data-split] .w { display: inline-block; white-space: nowrap; }
[data-split] .c {
  display: inline-block; opacity: 0; transform-origin: 50% 100%;
  transform: translateY(.5em) rotateX(-80deg); filter: blur(10px);
  transition: opacity .8s var(--ease), transform 1.1s var(--ease), filter .8s var(--ease);
  transition-delay: calc(var(--d, 0s) + var(--ci) * 38ms);
}
.active [data-split] .c { opacity: 1; transform: none; filter: blur(0); }
.leaving [data-split] .c {
  opacity: 0; transform: translateY(-.35em); filter: blur(6px);
  transition-duration: .4s; transition-delay: calc(var(--ci) * 12ms);
}

/* ---------- Typography ---------- */
.kicker {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 12px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--accent);
}
.kicker::before { content: ""; width: 34px; height: 1px; background: var(--accent); }

.title {
  font-weight: 200; line-height: 1.02; letter-spacing: -.01em;
  font-size: clamp(42px, min(6.2vw, 11vh), 124px);
  margin: 18px 0 0;
}
.lead { font-size: clamp(15px, min(1.25vw, 2.2vh), 21px); line-height: 1.65; color: var(--muted); max-width: 40ch; }

/* ---------- 01 ---------- */
.s1 { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.eye-anchor { width: min(44vw, 66vh); aspect-ratio: 2 / 1; flex: none; }
.s1-text { margin-top: 1vh; display: flex; flex-direction: column; align-items: center; }
.s1 .kicker::after { content: ""; width: 34px; height: 1px; background: var(--accent); }
.mega {
  font-weight: 200; font-size: clamp(44px, min(10.5vw, 17vh), 200px); line-height: 1;
  letter-spacing: .6em; margin: 2vh 0 0 .06em;
  transition: letter-spacing 2.6s var(--ease) .4s;
}
.active .mega { letter-spacing: .06em; }
.leaving .mega { letter-spacing: .3em; transition-duration: .6s; transition-delay: 0s; }
.sub {
  font-weight: 200; font-size: clamp(26px, min(4vw, 7vh), 72px); line-height: 1.15; letter-spacing: .02em; margin-top: .5vh;
}
.tag { margin-top: 2.6vh; font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: var(--muted); }
.begin {
  position: absolute; bottom: 104px; left: 50%; margin-left: -130px; width: 260px; text-align: center; white-space: nowrap;
  font-size: 11px; letter-spacing: .25em; text-transform: uppercase; color: rgba(255, 255, 255, .45);
}
.begin kbd {
  font: inherit; display: inline-block; border: 1px solid rgba(255, 255, 255, .4); padding: 2px 8px; margin: 0 4px;
  animation: nudge 1.6s var(--ease) infinite;
}
@keyframes nudge { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(5px); border-color: var(--accent); color: var(--accent); } }

/* ---------- 02 ---------- */
.s2 { display: flex; flex-direction: column; justify-content: center; gap: clamp(24px, 5vh, 60px); }
.s2-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 6vw; }
.s2 .title { font-size: clamp(40px, min(5.4vw, 10vh), 110px); }
.s2 .lead { max-width: 46ch; }

.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(14px, 1.8vw, 32px); }
.card-wrap { perspective: 1000px; }
.card {
  --rx: 0deg; --ry: 0deg; --mx: 50%; --my: 50%;
  position: relative; height: 100%;
  padding: clamp(18px, 2vw, 34px);
  background: var(--panel); border: 1px solid var(--faint);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transform: rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform .5s var(--ease), border-color .4s, background .4s;
  transform-style: preserve-3d;
}
.card:hover { border-color: transparent; background: rgba(30, 30, 30, .6); }
.card .corners { --c: var(--tone); --l: 16px; --t: 2px; inset: -1px; transition: inset .5s var(--ease); }
.card:hover .corners { inset: -8px; }
.card::before {
  content: ""; position: absolute; inset: -1px; padding: 1px; pointer-events: none;
  background: conic-gradient(from var(--ang), transparent 0 62%, var(--tone) 82%, transparent 92%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: spin 5s linear infinite; opacity: .55; transition: opacity .4s;
}
.card:hover::before { opacity: 1; }
.card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .4s;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(255, 255, 255, .09), transparent 45%);
}
.card:hover::after { opacity: 1; }
@property --ang { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes spin { to { --ang: 360deg; } }

.orb { width: min(46%, 21vh); aspect-ratio: 1; margin: 0 auto clamp(12px, 2.4vh, 28px); }
.card-body { transform: translateZ(30px); }
.chip {
  display: inline-block; font-size: 10.5px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase;
  color: var(--tone); border: 1px solid color-mix(in srgb, var(--tone) 45%, transparent); padding: 5px 10px;
}
.brand {
  display: flex; flex-direction: column; margin: clamp(10px, 1.8vh, 18px) 0 clamp(8px, 1.4vh, 14px);
  font-weight: 400; font-size: clamp(26px, min(2.4vw, 4.4vh), 44px); line-height: .95; letter-spacing: .05em;
}
.brand b { font-weight: 400; color: var(--tone); }
.card p { font-size: clamp(13px, min(.95vw, 1.75vh), 16px); line-height: 1.6; color: var(--muted); }

/* ---------- 03 ---------- */
.s3 { display: grid; grid-template-columns: 1.15fr .85fr; gap: 4vw; align-items: center; }
.s3 .title { font-size: clamp(42px, min(6.4vw, 12vh), 130px); }
.s3 .lead { margin-top: 2.4vh; }
.ecg { display: block; width: min(100%, 560px); height: 46px; margin: 2.6vh 0 1.6vh; overflow: visible; }
.ecg path { fill: none; stroke-linejoin: round; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.ecg-base { stroke: rgba(255, 255, 255, .18); stroke-width: 1.2; stroke-dasharray: 900; stroke-dashoffset: 900; transition: stroke-dashoffset 2.2s var(--ease) 1.2s; }
.active .ecg-base { stroke-dashoffset: 0; }
.ecg-pulse {
  stroke: var(--accent); stroke-width: 2; stroke-dasharray: 90 900;
  filter: drop-shadow(0 0 6px var(--accent));
  animation: ecg 2.4s linear infinite;
}
@keyframes ecg { from { stroke-dashoffset: 90; } to { stroke-dashoffset: -900; } }

.values { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(14px, 2.6vh, 30px) 3vw; max-width: 760px; }
.values li { position: relative; padding-top: 16px; }
.values li::before {
  content: ""; position: absolute; left: 0; top: 0; height: 1px; width: 100%; background: var(--faint);
  transform: scaleX(0); transform-origin: left; transition: transform 1.2s var(--ease) calc(var(--d) + .2s);
}
.active .values li::before { transform: none; }
.values li::after {
  content: ""; position: absolute; left: 0; top: 0; height: 1px; width: 40px; background: var(--accent);
}
.num { font-size: 11px; font-weight: 500; letter-spacing: .2em; color: var(--accent); }
.values h4, .teams h4 { font-weight: 400; font-size: clamp(16px, min(1.35vw, 2.4vh), 22px); margin: 6px 0 4px; }
.values p, .teams p { font-size: clamp(12.5px, min(.9vw, 1.7vh), 15px); line-height: 1.6; color: var(--muted); }

.heart-col { display: flex; align-items: center; justify-content: center; height: 100%; }
.heart-anchor { width: min(100%, 62vh); aspect-ratio: 1; }

/* ---------- 04 ---------- */
.s4 { display: grid; grid-template-columns: 1fr 1fr; gap: 4vw; align-items: center; }
.s4 .title { font-size: clamp(40px, min(5.2vw, 10vh), 110px); }
.teams { list-style: none; margin-top: clamp(20px, 4.5vh, 50px); max-width: 560px; }
.teams li {
  display: grid; grid-template-columns: 48px 1fr; align-items: baseline;
  padding: clamp(10px, 1.8vh, 18px) 0; border-top: 1px solid var(--faint); cursor: default;
  transition: padding .4s var(--ease), border-color .4s;
}
.teams li:last-child { border-bottom: 1px solid var(--faint); }
.teams li h4 { margin-top: 0; transition: color .3s; }
.teams li:hover { padding-left: 12px; border-color: rgba(245, 166, 35, .5); }
.teams li:hover h4 { color: var(--accent); }

.diagram-col { display: flex; align-items: center; justify-content: center; height: 100%; }
.diagram { position: relative; width: min(100%, 64vh); aspect-ratio: 1; }
.lbl { position: absolute; transform: translate(-50%, 0); white-space: nowrap; cursor: default; }
.lbl span {
  display: inline-flex; gap: 8px; align-items: center;
  font-size: 11px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase;
  padding: 6px 10px; background: rgba(0, 0, 0, .55); border: 1px solid var(--faint);
  transition: border-color .3s, color .3s;
}
.lbl:hover span { border-color: var(--accent); color: var(--accent); }
.lbl i { font-style: normal; color: var(--accent); }
.l-core { left: 50%; top: 21%; transform: translate(-50%, -100%); }
.l-dev { left: 25%; top: 76%; }
.l-design { left: 75%; top: 76%; }
.l-ext { left: 86%; top: 12%; transform: translate(-30%, -50%); }

/* ---------- Small screens ---------- */
@media (max-width: 900px) {
  :root { --pad-x: 20px; }
  .topbar { height: 64px; }
  .hint, .section-name { display: none; }
  .slide { padding: 80px 20px 80px; overflow-y: auto; }
  .s2, .s3, .s4 { display: flex; flex-direction: column; justify-content: flex-start; gap: 28px; }
  .s2-head { flex-direction: column; align-items: flex-start; gap: 16px; }
  .products { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr; }
  .heart-col, .diagram-col { width: 100%; height: auto; }
  .heart-anchor { width: 70%; }
  .diagram { width: 100%; }
  .begin { bottom: 90px; }
}

@media (prefers-reduced-motion: reduce) {
  .grain, .ecg-pulse, .card::before, .begin kbd { animation: none; }
}