/* ==========================================================
   EPITAXY LAB — white-first, Apple-style bands, monochrome
   Display: Michroma · Body: IBM Plex Sans · Utility: IBM Plex Mono
   ========================================================== */

:root{
  /* Apple-derived neutrals */
  --white:#FFFFFF;
  --grey:#F5F5F7;
  --text-l:#1D1D1F;
  --mute-l:#6E6E73;
  --line-l:#D2D2D7;
  --fill-l:#F5F5F7;

  --black:#000000;
  --black-2:#0C0C0E;
  --text-d:#F5F5F7;
  --mute-d:#86868B;
  --line-d:#2C2C2F;

  --display:'Michroma','Eurostile','Bank Gothic',system-ui,sans-serif;
  --body:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',Helvetica,Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;

  --wrap:1280px;
  --pad:clamp(20px,4vw,48px);
  --nav-h:60px;
  --band-y:clamp(96px,12vw,168px);
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--white);
  color:var(--text-l);
  font-family:var(--body);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
p{margin:0}
h1,h2,h3{margin:0;font-weight:500}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid currentColor;outline-offset:3px}

/* ---------- tokens per band ---------- */
.band{
  --bg:var(--white); --fg:var(--text-l); --mute:var(--mute-l); --line:var(--line-l); --fill:var(--fill-l);
  --ink:0,0,0;
  background:var(--bg); color:var(--fg);
  padding:var(--band-y) 0;
  position:relative;
}
.band.grey{--bg:var(--grey);--fill:var(--white)}
.band.dark{
  --bg:var(--black); --fg:var(--text-d); --mute:var(--mute-d); --line:var(--line-d); --fill:var(--black-2);
  --ink:255,255,255;
}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad);position:relative}

/* ---------- type ---------- */
.display{
  font-family:var(--display);
  font-weight:400;
  text-transform:uppercase;
  letter-spacing:.01em;
  line-height:1.12;
  text-wrap:balance;
}
h1.display{font-size:clamp(32px,5.4vw,76px);line-height:1.04;letter-spacing:-.005em}
h2.display{font-size:clamp(24px,3.2vw,44px)}
h3{font-size:22px;line-height:1.3;font-weight:600;letter-spacing:-.01em}
.mono{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;font-variant-numeric:tabular-nums}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--mute);margin-bottom:22px;
}
.lede{font-size:clamp(19px,1.6vw,23px);line-height:1.45;max-width:58ch;color:var(--fg);font-weight:400;letter-spacing:-.005em}
.muted{color:var(--mute)}
.copy{display:flex;flex-direction:column;gap:22px;max-width:62ch}
.copy .eyebrow{margin-bottom:0}
.copy p:not(.lede):not(.eyebrow):not(.mono){max-width:58ch;color:var(--mute);font-size:17px}
.fine{font-size:14px;line-height:1.55;color:var(--mute);border-top:1px solid var(--line);padding-top:14px;margin-top:auto}
.section-head{display:flex;flex-direction:column;gap:18px;margin-bottom:clamp(48px,6vw,80px);max-width:72ch}
.section-head .eyebrow{margin-bottom:6px}
.section-head .lede{color:var(--mute)}
.svg-mono{font-family:var(--mono)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:999px;
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid transparent;white-space:nowrap;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.btn-solid{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.btn-solid:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 12px 30px -12px rgba(var(--ink),.45)}
.btn-ghost{border-color:var(--line);color:var(--fg);background:transparent}
.btn-ghost:hover{border-color:var(--fg);transform:translateY(-2px)}
.btn .arrow{width:14px;height:14px;transition:transform .25s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}

/* ---------- nav ---------- */
.nav{
  --bg:var(--white); --fg:var(--text-l); --mute:var(--mute-l); --line:var(--line-l);
  position:fixed;top:0;left:0;right:0;z-index:50;height:var(--nav-h);
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(0,0,0,.08);
  color:var(--fg);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.nav.over-dark{background:rgba(0,0,0,.6);border-bottom-color:rgba(255,255,255,.12);--fg:var(--text-d);--mute:var(--mute-d);--bg:var(--black);color:var(--fg)}
.nav-in{height:100%;display:flex;align-items:center;gap:32px}
.wordmark{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--display);font-size:13px;letter-spacing:.22em;
}
.wordmark span{color:var(--mute);margin-left:.35em}
.mark{width:22px;height:22px;fill:currentColor}
.links{display:flex;gap:28px;margin-left:auto}
.links a{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mute);transition:color .15s ease;
}
.links a:hover{color:var(--fg)}
.nav-cta{height:36px;padding:0 18px;font-size:12px}
.only-mobile{display:none}
.burger{
  display:none;width:44px;height:44px;margin-right:-10px;
  background:none;border:0;cursor:pointer;color:var(--fg);
  flex-direction:column;justify-content:center;align-items:center;gap:6px;
}
.burger span{display:block;width:22px;height:1.5px;background:currentColor;transition:transform .2s ease}
.burger[aria-expanded="true"] span:first-child{transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-3.75px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  overflow:hidden;
  padding-top:calc(var(--nav-h) + clamp(88px,11vw,150px));
  padding-bottom:clamp(80px,10vw,130px);
}
#lattice{
  position:absolute;top:0;right:0;bottom:0;width:60%;height:100%;
  pointer-events:none;
  -webkit-mask-image:linear-gradient(to right,transparent 0%,#000 36%,#000 100%),linear-gradient(to top,transparent 0%,#000 22%);
  -webkit-mask-composite:source-in;
  mask-image:linear-gradient(to right,transparent 0%,#000 36%,#000 100%),linear-gradient(to top,transparent 0%,#000 22%);
  mask-composite:intersect;
}
.hero-in{display:flex;flex-direction:column;gap:30px}
.hero-in .eyebrow{margin-bottom:0}
.hero-in h1{max-width:12ch;position:relative}
.hero-in .lede{max-width:50ch;color:#424245}
.readout{
  display:inline-flex;flex-wrap:wrap;gap:6px 0;margin-top:22px;
  color:var(--mute);text-transform:uppercase;font-size:11.5px;letter-spacing:.14em;
}
.readout span{display:inline-flex;align-items:center}
.readout span + span::before{content:"";width:1px;height:12px;background:var(--line);margin:0 14px}
.readout .dot{width:6px;height:6px;border-radius:50%;background:var(--fg);margin-right:10px;animation:blink 1.6s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

/* liquid-metal sheen on the headline */
.js .sheen{
  background:linear-gradient(100deg,var(--fg) 0%,var(--fg) 38%,#9A9AA0 50%,var(--fg) 62%,var(--fg) 100%);
  background-size:260% 100%;
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  animation:sheen 7s linear infinite;
}
@keyframes sheen{from{background-position:120% 0}to{background-position:-140% 0}}

/* hero entrance */
.js .hero-in > *{animation:rise .9s var(--ease) both}
.js .hero-in > :nth-child(1){animation-delay:.05s}
.js .hero-in > :nth-child(2){animation-delay:.15s}
.js .hero-in > :nth-child(3){animation-delay:.28s}
.js .hero-in > :nth-child(4){animation-delay:.40s}
.js .hero-in > :nth-child(5){animation-delay:.52s}
@keyframes rise{from{opacity:0;transform:translateY(22px);filter:blur(8px)}to{opacity:1;transform:none;filter:blur(0)}}

/* ---------- marquee ---------- */
.marquee{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:18px 0;overflow:hidden;background:var(--white);
  -webkit-mask-image:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent);
  mask-image:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent);
}
.track{display:flex;width:max-content;gap:0;animation:marquee 60s linear infinite;will-change:transform}
.marquee:hover .track{animation-play-state:paused}
.track ul{display:flex;gap:0;padding-right:0}
.track li{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute);
  padding:0 28px;white-space:nowrap;display:flex;align-items:center;gap:28px;
}
.track li::after{content:"";width:5px;height:5px;border:1px solid currentColor;transform:rotate(45deg);opacity:.6}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- reveal on scroll ---------- */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease);transition-delay:calc(var(--i,0) * 90ms)}
.js .reveal.in{opacity:1;transform:none}

/* ---------- grids ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,110px)}
.v-center{align-items:center}
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cols-3 .col{background:var(--bg);padding:clamp(28px,3.4vw,44px);display:flex;flex-direction:column;gap:14px;position:relative;overflow:hidden}
.cols-3 .col p{color:var(--mute);max-width:40ch}
.cols-3 .col h3{font-size:19px}

/* ---------- the name (cross-section) ---------- */
.def{color:var(--mute);margin-top:-8px}
.stack{margin:0;color:var(--fg)}
.stack svg{width:100%;height:auto;overflow:visible}
.stack .layer{transform-box:fill-box;transform-origin:50% 100%;transform:scaleY(0);transition:transform 1.1s var(--ease)}
.stack .layer:nth-child(1){transition-delay:.1s}
.stack .layer:nth-child(2){transition-delay:.35s}
.stack .layer:nth-child(3){transition-delay:.6s}
.stack .layer:nth-child(4){transition-delay:.85s}
.stack .label{opacity:0;transition:opacity .8s var(--ease)}
.stack .label:nth-child(1){transition-delay:1.2s}.stack .label:nth-child(2){transition-delay:1.05s}
.stack .label:nth-child(3){transition-delay:.9s}.stack .label:nth-child(4){transition-delay:.75s}.stack .label:nth-child(5){transition-delay:1.4s}
.stack .dop circle{opacity:0;transition:opacity .6s var(--ease)}
.stack.in .layer{transform:scaleY(1)}
.stack.in .label{opacity:1}
.stack.in .dop circle{opacity:1;animation:pulse 3.2s ease-in-out infinite;animation-delay:calc(var(--d) * .25s + 1.4s)}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
:not(.js) .stack .layer{transform:none}:not(.js) .stack .label{opacity:1}:not(.js) .stack .dop circle{opacity:1}

/* ---------- services lattice ---------- */
.lattice-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--line);border:1px solid var(--line);
}
.cell{
  background:var(--bg);padding:clamp(30px,3.6vw,52px);
  display:flex;flex-direction:column;gap:16px;position:relative;overflow:hidden;
}
.cell::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .35s var(--ease);
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(var(--ink),.06),transparent 60%);
}
.cell:hover::after{opacity:1}
.cell .tag{margin-bottom:6px}
.tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--mute)}
.cell > p:not(.tag):not(.fine){color:var(--mute);max-width:52ch}
.cell ul{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.cell li{position:relative;padding-left:20px;font-size:15.5px;line-height:1.5}
.cell li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;
  border:1px solid currentColor;transform:rotate(45deg);
}
.cell h3{transition:transform .35s var(--ease)}
.cell:hover h3{transform:translateX(4px)}

/* ---------- work / device ---------- */
.work{overflow:hidden}
.device{margin:0;display:flex;flex-direction:column;align-items:center;gap:22px;perspective:1400px}
.device-frame{
  position:relative;width:min(100%,340px);aspect-ratio:435/900;
  border:1px solid rgba(255,255,255,.18);border-radius:44px;padding:11px;
  background:linear-gradient(160deg,#1a1a1c,#050506);
  box-shadow:0 40px 90px -30px rgba(0,0,0,.9),inset 0 0 0 1px rgba(255,255,255,.04);
  transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));
  transition:transform .6s var(--ease);
  will-change:transform;
}
.device-frame::before{ /* dynamic island */
  content:"";position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:92px;height:26px;border-radius:999px;background:#000;z-index:2;
}
.device-frame::after{ /* moving sheen */
  content:"";position:absolute;inset:0;border-radius:44px;pointer-events:none;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.14) 45%,transparent 60%);
  background-size:220% 100%;background-position:var(--sx,120%) 0;
  transition:background-position .6s var(--ease);
}
.device-frame img{
  width:100%;height:100%;object-fit:cover;border-radius:34px;
  filter:grayscale(1) contrast(1.06);
}
.device figcaption{color:var(--mute);text-transform:uppercase}
.specs{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:8px 0 0;
  background:var(--line);border:1px solid var(--line);
  text-transform:none;letter-spacing:.02em;font-size:13px;
}
.specs > div{background:var(--bg);padding:14px 16px;display:flex;flex-direction:column;gap:6px}
.specs dt{color:var(--mute);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.specs dd{margin:0;line-height:1.45}

/* ---------- process ---------- */
.steps{
  display:grid;grid-template-columns:repeat(5,1fr);gap:clamp(20px,2.5vw,36px);
  position:relative;padding-top:1px;
}
.steps::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--line)}
.steps-line{
  position:absolute;top:0;left:0;right:0;height:1px;background:var(--fg);
  transform:scaleX(var(--p,0));transform-origin:left;transition:transform .2s linear;
}
.steps li{padding-top:24px;display:flex;flex-direction:column;gap:12px;position:relative}
.steps li::before{
  content:"";position:absolute;top:-4px;left:0;width:7px;height:7px;border-radius:50%;
  background:var(--bg);border:1px solid var(--fg);
}
.step-meta{display:flex;justify-content:space-between;color:var(--mute);text-transform:uppercase}
.steps h3{font-size:19px}
.steps li > p:not(.step-meta){color:var(--mute);font-size:15px;line-height:1.55}
.commit{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(40px,5vw,64px)}
.commit li{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--line);border-radius:999px;padding:10px 18px;color:var(--fg);
}

/* ---------- AI (dark, 3D lattice) ---------- */
.ai{overflow:hidden}
#cube{
  position:absolute;top:0;right:-6%;bottom:0;width:62%;height:100%;pointer-events:none;
  -webkit-mask-image:linear-gradient(to right,transparent 0%,#000 30%,#000 100%),linear-gradient(to bottom,transparent 0%,#000 15%,#000 85%,transparent 100%);
  -webkit-mask-composite:source-in;
  mask-image:linear-gradient(to right,transparent 0%,#000 30%,#000 100%),linear-gradient(to bottom,transparent 0%,#000 15%,#000 85%,transparent 100%);
  mask-composite:intersect;
  opacity:.9;
}
.ai .cols-3{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.12)}
.ai .cols-3 .col{background:rgba(0,0,0,.55);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}

/* ---------- contact ---------- */
.mail{
  font-family:var(--display);font-size:clamp(14px,1.5vw,18px);letter-spacing:.06em;
  border-bottom:1px solid var(--line);padding-bottom:6px;transition:border-color .15s ease;
}
.mail:hover{border-color:var(--fg)}
.form{display:flex;flex-direction:column;gap:26px;padding-top:6px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;
  color:var(--fg);font:inherit;font-size:16px;padding:10px 0 12px;
  transition:border-color .2s ease;
}
.field select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(-45deg,transparent 50%,currentColor 50%);
  background-position:calc(100% - 12px) 55%,calc(100% - 6px) 55%;background-size:6px 6px;background-repeat:no-repeat;padding-right:28px}
.field select option{color:#1D1D1F;background:#fff}
.field textarea{resize:vertical;min-height:110px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--fg)}
.field.invalid input,.field.invalid textarea{border-bottom-color:#B3261E}
.form-foot{display:flex;align-items:center;gap:18px;flex-wrap:wrap}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);padding:clamp(56px,7vw,88px) 0 40px}
.foot-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid var(--line);
}
.foot-grid > div{display:flex;flex-direction:column;gap:18px}
.foot-grid > div p{max-width:34ch;font-size:15px}
.foot-grid nav{display:flex;flex-direction:column;gap:12px}
.foot-grid nav a{font-size:15px;color:var(--fg);opacity:.85;transition:opacity .15s ease}
.foot-grid nav a:hover{opacity:1}
.foot-grid nav .tag{margin-bottom:6px}
.foot-bottom{
  display:grid;grid-template-columns:1fr 2fr;gap:24px;padding-top:28px;
  color:var(--mute);font-size:12px;line-height:1.6;letter-spacing:.03em;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .steps{grid-template-columns:repeat(3,1fr);row-gap:44px}
  .foot-grid{grid-template-columns:1fr 1fr}
  #cube{width:80%;opacity:.5}
}
@media (max-width:860px){
  .links{
    display:none;position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;gap:0;padding:8px var(--pad) 24px;
    background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);color:var(--text-l);
  }
  .nav.over-dark .links{background:rgba(0,0,0,.96)}
  .links.open{display:flex}
  .links a{padding:16px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--fg)}
  .links a.btn{margin-top:20px;border-bottom:0;padding:0 24px;color:var(--bg)}
  .only-mobile{display:inline-flex}
  .nav-cta{display:none}
  .burger{display:flex;margin-left:auto}
  #lattice{width:100%;opacity:.4;
    -webkit-mask-image:linear-gradient(to top,transparent 0%,#000 30%);mask-image:linear-gradient(to top,transparent 0%,#000 30%)}
  #cube{width:100%;right:0;opacity:.35}
  .grid-2{grid-template-columns:1fr}
  .cols-3{grid-template-columns:1fr}
  .lattice-grid{grid-template-columns:1fr}
  .device{align-items:flex-start}
  .device-frame{width:min(100%,290px)}
  .foot-bottom{grid-template-columns:1fr}
}
@media (max-width:600px){
  .steps{grid-template-columns:1fr;row-gap:36px}
  .specs{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  h3{font-size:19px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .js .reveal{opacity:1;transform:none}
  .js .sheen{-webkit-text-fill-color:currentColor;color:inherit;background:none}
  .stack .layer{transform:none}.stack .label{opacity:1}.stack .dop circle{opacity:1}
  .steps-line{transform:none}
}

/* process wrapper (line + list share one origin) */
.steps-wrap{position:relative}

/* ---------- language switcher ---------- */
.nav{--ink:0,0,0}
.nav.over-dark{--ink:255,255,255}
.lang{display:flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);border-radius:999px}
.lang button{
  background:none;border:0;cursor:pointer;
  height:28px;padding:0 10px;border-radius:999px;
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--mute);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.lang button:hover{color:var(--fg)}
.lang button[aria-pressed="true"]{color:var(--bg);background:var(--fg)}
@media (max-width:860px){
  .lang{margin-left:auto}
  .lang button{height:26px;padding:0 8px;font-size:10.5px}
  .burger{margin-left:0}
}

/* nav breathing room once the language switcher joins the row */
@media (max-width:1120px){
  .nav-in{gap:20px}
  .links{gap:20px}
  .links a{font-size:11.5px;letter-spacing:.1em}
  .nav-cta{padding:0 14px;letter-spacing:.06em}
}
@media (max-width:960px) and (min-width:861px){
  .nav-cta{display:none}
}