:root {
  --bg: #0b0b0c;
  --fg: #f2efe9;
  --muted: #8d8a85;
  --line: rgba(242, 239, 233, 0.12);
  --accent: #ff5a1f;
  --ink: #140a05;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --sans: "Inter Tight", system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --gutter: clamp(16px, 6vw, 96px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }

/* ---------- Fixed layers ---------- */
#scene, .glow, .grain, .flash, .tags {
  position: fixed; inset: 0; width: 100%; height: 100lvh; pointer-events: none;
}
#scene { z-index: 1; opacity: 0; transition: opacity 1200ms var(--ease-out); }
#scene.ready { opacity: 1; }
.glow {
  z-index: 0;
  background:
    radial-gradient(40vw 40vw at var(--gx, 70%) 50%, rgba(255, 90, 31, 0.13), transparent 70%),
    radial-gradient(60vw 50vw at 20% 110%, rgba(120, 140, 255, 0.06), transparent 70%);
  transition: background-position 600ms var(--ease-out);
}
.grain {
  z-index: 50; opacity: 0.07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.flash { z-index: 2; background: var(--accent); opacity: 0; }
.tags { z-index: 3; }

main { position: relative; z-index: 4; }

/* ---------- Header ---------- */
.top {
  position: fixed; z-index: 20; top: 0; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px var(--gutter);
  mix-blend-mode: difference;
}
.logo { font-weight: 700; font-size: 20px; letter-spacing: -0.03em; }
.logo span { font-weight: 400; font-size: 0.6em; vertical-align: super; }
.top nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.top nav a { opacity: 0.75; transition: opacity 200ms ease; }
.lang {
  display: inline-flex; gap: 2px; padding: 3px; border-radius: 99px;
  border: 1px solid rgba(255,255,255,0.3); font-size: 12px; font-weight: 600;
}
.lang span { padding: 3px 8px; border-radius: 99px; transition: background-color 200ms ease, color 200ms ease; }
html[lang="en"] .lang [data-l="en"], html[lang="es"] .lang [data-l="es"] { background: #fff; color: #000; }
.progress { position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: rgba(255,255,255,0.12); }
.progress i { display: block; height: 100%; background: #fff; transform-origin: 0 50%; transform: scaleX(0); }

/* ---------- Rail + chapter ---------- */
.rail {
  position: fixed; z-index: 10; right: calc(var(--gutter) * 0.45); top: 50%; transform: translateY(-50%);
  list-style: none; display: flex; flex-direction: column; gap: 14px;
}
.rail li { pointer-events: auto; }
.rail button {
  display: flex; align-items: center; justify-content: flex-end; gap: 10px;
  font: 500 11px var(--mono); color: var(--muted); letter-spacing: 0.04em;
}
.rail button span { opacity: 0; transform: translateX(6px); transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out); }
.rail button i {
  width: 6px; height: 6px; border-radius: 50%; background: currentColor;
  transition: transform 300ms var(--ease-out), background-color 300ms ease;
}
.rail .on button { color: var(--fg); }
.rail .on button i { background: var(--accent); transform: scale(1.6); }
.rail .on button span { opacity: 1; transform: none; }

.chapter {
  position: fixed; z-index: 10; left: var(--gutter); bottom: 28px;
  display: flex; align-items: baseline; gap: 8px; font: 500 12px var(--mono); color: var(--muted);
  mix-blend-mode: difference;
}
.chapter b { color: var(--fg); font-weight: 500; }
.chapter em { font: inherit; margin-left: 10px; color: var(--fg); display: inline-block; }

/* ---------- Steps ---------- */
.step {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  padding: 120px var(--gutter);
}
.step .copy { width: min(500px, 100%); }
.step.left .copy { margin-right: auto; }
.step.right .copy { margin-left: auto; margin-right: 4vw; }
.step + .step { min-height: 130vh; }

.eyebrow {
  display: flex; align-items: center; gap: 10px;
  font: 500 12px var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 22px;
}
.live { width: 7px; height: 7px; border-radius: 50%; background: #3ddc84; box-shadow: 0 0 0 0 rgba(61,220,132,0.6); animation: live 2s infinite; }
@keyframes live { 70% { box-shadow: 0 0 0 8px rgba(61,220,132,0); } 100% { box-shadow: 0 0 0 0 rgba(61,220,132,0); } }

h1, h2 { font-weight: 600; letter-spacing: -0.045em; line-height: 0.98; text-wrap: balance; }
h1 { font-size: clamp(46px, 6.4vw, 96px); }
h2 { font-size: clamp(40px, 4.8vw, 72px); }
h1 em, h2 em { color: var(--accent); font-size: 1.08em; line-height: 0.9; }
.hero .copy { width: min(640px, 100%); }
.lead { margin-top: 26px; color: #bdb9b2; font-size: clamp(16px, 1.25vw, 19px); max-width: 44ch; text-wrap: pretty; }

/* Buttons */
.ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 22px; border-radius: 99px;
  font-size: 15px; font-weight: 600;
  transition: transform 160ms var(--ease-out), background-color 200ms ease, border-color 200ms ease, color 200ms ease;
}
.btn:active, .media-card:active, .clips button:active, .rail button:active { transform: scale(0.97); }
.btn.primary { background: var(--fg); color: var(--bg); }
.btn.ghost { border: 1px solid var(--line); background: rgba(255,255,255,0.03); backdrop-filter: blur(8px); }
.btn.small { height: 42px; margin-top: 18px; font-size: 14px; }
.btn.dark { background: var(--ink); color: var(--accent); }
.btn.outline { border: 1.5px solid var(--ink); color: var(--ink); }

@media (hover: hover) and (pointer: fine) {
  .top nav a:hover { opacity: 1; }
  .btn.primary:hover { background: var(--accent); color: var(--ink); }
  .btn.ghost:hover { border-color: rgba(242,239,233,0.35); }
  .btn.outline:hover { background: var(--ink); color: var(--accent); }
  .media-card:hover img { transform: scale(1.04); }
  .clips button:hover img { transform: scale(1.06); }
  .mail:hover span { transform: translate(4px, -4px); }
  .rail button:hover span { opacity: 1; transform: none; }
}

/* Scroll hint */
.hint {
  position: absolute; left: var(--gutter); bottom: 80px;
  display: flex; align-items: center; gap: 12px; font: 500 12px var(--mono); color: var(--muted); letter-spacing: 0.04em;
}
.hint span { width: 1px; height: 36px; background: var(--line); position: relative; overflow: hidden; }
.hint span::after {
  content: ""; position: absolute; left: 0; top: 0; width: 1px; height: 12px; background: var(--accent);
  animation: drip 1.8s var(--ease-in-out) infinite;
}
@keyframes drip { from { transform: translateY(-12px); } to { transform: translateY(36px); } }

/* Method list */
.method { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 40px; border-top: 1px solid var(--line); }
.method li { padding: 16px 12px 0 0; display: grid; gap: 6px; }
.method b { font: 500 11px var(--mono); color: var(--accent); }
.method span { font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }

/* Chips */
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.chips li {
  padding: 7px 13px; border-radius: 99px; border: 1px solid var(--line);
  font: 500 12.5px var(--mono); color: #d8d4cc; background: rgba(255,255,255,0.025);
}

/* Facts */
.facts { list-style: none; margin-top: 32px; border-top: 1px solid var(--line); }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.facts b { font-weight: 600; }
.facts span { color: var(--muted); text-align: right; }

/* Media */
.media-card {
  display: flex; align-items: center; gap: 16px; margin-top: 26px; padding: 8px 18px 8px 8px; width: 100%;
  border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.03); text-align: left;
  transition: transform 160ms var(--ease-out), border-color 200ms ease;
}
.media-card img { width: 76px; height: 76px; object-fit: cover; border-radius: 12px; transition: transform 500ms var(--ease-out); }
.media-card span { display: grid; flex: 1; }
.media-card b { font-weight: 600; font-size: 15px; }
.media-card small { font: 500 12px var(--mono); color: var(--muted); }
.media-card { overflow: hidden; }
.media-card::after { content: "▶"; font-size: 12px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: var(--ink); }

.clips { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 32px; }
.clips button { position: relative; aspect-ratio: 16 / 9; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); transition: transform 160ms var(--ease-out); }
.clips img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 600ms var(--ease-out); }
.clips button::after {
  content: "▶"; position: absolute; left: 10px; bottom: 10px; font-size: 9px;
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: rgba(0,0,0,0.55); backdrop-filter: blur(6px);
}

/* Contact */
.contact { min-height: 100vh !important; justify-content: center; text-align: center; color: var(--ink); flex-direction: column; }
.contact .copy { width: min(900px, 100%); margin: 0 auto; }
.contact .eyebrow { justify-content: center; color: rgba(20,10,5,0.6); }
.contact h2 { font-size: clamp(56px, 10vw, 160px); }
.contact h2 em { color: var(--ink); }
.contact .lead { color: rgba(20,10,5,0.72); margin-left: auto; margin-right: auto; }
.contact .ctas { justify-content: center; }
.mail {
  display: inline-flex; align-items: center; gap: 12px; margin-top: 36px;
  font-size: clamp(20px, 2.6vw, 34px); font-weight: 600; letter-spacing: -0.03em;
  border-bottom: 2px solid var(--ink); padding-bottom: 4px;
}
.mail span { display: inline-block; transition: transform 250ms var(--ease-out); }
.contact footer {
  position: absolute; left: var(--gutter); right: var(--gutter); bottom: 28px;
  display: flex; justify-content: space-between; gap: 16px; font: 500 12px var(--mono); color: rgba(20,10,5,0.6);
}

/* Header chrome over the orange ending */
body.accent .top, body.accent .chapter { mix-blend-mode: normal; color: var(--ink); }
body.accent .chapter b, body.accent .chapter em { color: var(--ink); }
body.accent .lang { border-color: rgba(20,10,5,0.35); }
html[lang] body.accent .lang span[data-l] { background: none; color: var(--ink); }
html[lang="en"] body.accent .lang [data-l="en"], html[lang="es"] body.accent .lang [data-l="es"] { background: var(--ink); color: var(--accent); }
body.accent .progress { background: rgba(20,10,5,0.15); }
body.accent .progress i { background: var(--ink); }
body.accent .rail button, body.accent .rail .on button { color: var(--ink); }
body.accent .rail .on button i { background: var(--ink); }
.top, .chapter, .rail button { transition: color 300ms ease; }

/* 3D part labels */
.tag {
  position: absolute; left: 0; top: 0; display: flex; align-items: center; gap: 0;
  font: 500 11px var(--mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--fg);
  white-space: nowrap; will-change: transform, opacity;
}
.tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(255,90,31,0.18); flex: none; transform: translate(-50%, 0); }
.tag i { width: 54px; height: 1px; background: rgba(242,239,233,0.35); margin-right: 10px; }
.tag b { font-weight: 500; padding: 5px 9px; border: 1px solid var(--line); border-radius: 6px; background: rgba(11,11,12,0.6); backdrop-filter: blur(6px); }

/* ---------- Reveal ---------- */
[data-reveal] {
  opacity: 0; transform: translateY(18px); filter: blur(6px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out), filter 800ms var(--ease-out);
  transition-delay: calc(var(--d, 0) * 70ms + 120ms);
}
.in [data-reveal] { opacity: 1; transform: none; filter: blur(0); }
.w { display: inline-block; overflow: hidden; vertical-align: top; padding: 0.04em 0 0.1em; margin-bottom: -0.1em; }
.w > span { display: inline-block; transform: translateY(110%); transition: transform 1000ms var(--ease-out); transition-delay: calc(var(--i) * 45ms); }
.in .w > span { transform: none; }
.clips button { opacity: 0; transform: translateY(10px); transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out); transition-delay: calc(var(--i) * 60ms + 400ms); }
.in .clips button { opacity: 1; transform: none; }
/* Language swap */
[data-i18n] { transition: opacity 180ms ease, filter 180ms ease; }
.swapping [data-i18n] { opacity: 0; filter: blur(3px); }

/* Video dialog */
.player {
  margin: auto; border: 0; padding: 0; background: #000; border-radius: 18px; overflow: visible;
  width: min(1000px, 92vw); color: var(--fg);
  opacity: 0; transform: scale(0.96); transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out), overlay 250ms allow-discrete, display 250ms allow-discrete;
}
.player[open] { opacity: 1; transform: none; }
@starting-style { .player[open] { opacity: 0; transform: scale(0.96); } }
.player video { display: block; width: 100%; height: auto; border-radius: 18px; background: #000; }
.player::backdrop { background: rgba(5,5,6,0.8); backdrop-filter: blur(10px); }
.player .close {
  position: absolute; top: -14px; right: -14px; width: 36px; height: 36px; border-radius: 50%;
  background: var(--fg); color: var(--bg); font-size: 22px; line-height: 1; transition: transform 160ms var(--ease-out);
}
.player .close:active { transform: scale(0.94); }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .top nav a { display: none; }
  .rail, .tags { display: none; }
  .step { align-items: flex-end; padding: 96px 16px 72px; }
  /* card starts under the phone when the section is centred, then scrolls over it */
  .step + .step { min-height: 140vh; align-items: flex-start; padding-top: 70vh; }
  .step .copy, .step.right .copy {
    margin: 0; padding: 22px; border-radius: 22px;
    background: rgba(11,11,12,0.72); border: 1px solid var(--line);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  }
  .hero .copy { background: none; border: 0; backdrop-filter: none; padding: 0; }
  .hero { align-items: flex-end; }
  .hint { display: none; }
  .method { grid-template-columns: repeat(2, 1fr); row-gap: 16px; }
  .contact .copy { background: none; border: 0; backdrop-filter: none; padding: 0; }
  .contact { align-items: center; }
  .contact footer { flex-direction: column; align-items: center; }
  .chapter { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal], .clips button { transform: none; filter: none; transition: opacity 400ms ease; }
  .w > span { transform: none; transition: none; }
  .hint span::after, .live { animation: none; }
}