:root {
  color-scheme: dark;
  --paper: #060606;
  --ink: #F0ECE6;
  --ink-soft: rgba(240, 236, 230, .70);
  --ink-mute: rgba(240, 236, 230, .55);
  --accent: #EFA52A;
  --steel: #27302A;
  --bronze: #3E392C;
  --rule: rgba(255, 255, 255, .10);
  --gutter: 80px;
  --display: "Outfit", system-ui, sans-serif;
  --text: "DM Sans", system-ui, sans-serif;
}
@media (max-width: 760px) { :root { --gutter: 20px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 var(--text); }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* Barra superior: logo · idioma · Luz */
.top {
  position: absolute; inset: 0 0 auto 0; z-index: 3;
  display: flex; align-items: center; gap: 24px;
  padding: 28px var(--gutter);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 500 19px/1 var(--display); letter-spacing: -.02em; }
.brand img { width: 26px; height: 26px; }
.top nav { margin-left: auto; display: flex; align-items: center; gap: 22px; font-size: 15px; }
.top nav a { color: var(--ink-soft); text-decoration: none; }
.top nav a:hover { color: var(--ink); }

/* Hero: el video a sangre, el texto abajo a la izquierda */
.hero { position: relative; min-height: 100vh; min-height: 100dvh; display: flex; align-items: flex-end; overflow: hidden; }
.hero video, .hero .poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(to top, rgba(6,6,6,.94) 0%, rgba(6,6,6,.65) 24%, rgba(6,6,6,0) 64%),
    linear-gradient(to right, rgba(6,6,6,.86) 0%, rgba(6,6,6,.66) 36%, rgba(6,6,6,.28) 61%, rgba(6,6,6,0) 82%);
}
.hero-copy { position: relative; z-index: 2; padding: 0 var(--gutter) 72px; max-width: 900px; }
.hero h1 { margin: 0; font: 400 clamp(40px, 6.2vw, 92px)/.98 var(--display); letter-spacing: -.045em; text-wrap: balance; }
.hero .lede { margin: 22px 0 0; max-width: 34em; color: var(--ink-soft); font-size: clamp(17px, 1.4vw, 20px); }
.actions { margin-top: 34px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 26px; }
.btn {
  appearance: none; border: 0; cursor: pointer; min-height: 48px; padding: 0 26px;
  border-radius: 999px; background: var(--ink); color: var(--paper);
  font: 500 16px/1 var(--text); display: inline-flex; align-items: center;
}
.btn:hover { background: #fff; }
.proof { margin: 0; color: var(--ink-mute); font-size: 15px; }

/* Sectores: cada uno enciende sus procesos al compás del video; al final quedan todos y «Agentic OS» */
.sectors {
  position: absolute; z-index: 2; right: var(--gutter); top: 50%; transform: translateY(-50%);
  width: min(340px, 36vw); text-align: right; font-family: var(--display); letter-spacing: -.01em;
}
.sector { display: none; }
.sector.active { display: block; }
.sector-name { margin: 0 0 14px; font: 400 clamp(26px, 2.6vw, 38px)/1 var(--display); letter-spacing: -.035em; color: var(--ink); }
.sector ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.sector li {
  display: flex; align-items: center; justify-content: flex-end; gap: 12px;
  font-size: clamp(15px, 1.3vw, 19px); line-height: 1.2; color: var(--ink);
  max-height: 0; opacity: 0; transform: translateX(14px); overflow: hidden;
  transition: max-height .45s cubic-bezier(.2,.7,.2,1), opacity .45s ease, transform .45s cubic-bezier(.2,.7,.2,1);
}
.sector li::after { content: ""; flex: none; width: 10px; height: 14px; background: var(--steel); outline: 1px solid var(--rule); transition: background .4s ease .15s, box-shadow .4s ease .15s; }
.sector li.on { max-height: 48px; opacity: 1; transform: none; }
.sector li.on::after { background: var(--accent); box-shadow: 0 0 18px rgba(239,165,42,.55); }
.sector.active .sector-name { animation: sector-in .5s cubic-bezier(.2,.7,.2,1) both; }
@keyframes sector-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.sectors.all .sector { display: block; }
.sectors.all .sector ul { display: none; }
.sectors.all .sector-name { margin: 0 0 8px; font-size: clamp(18px, 1.6vw, 24px); color: var(--ink-soft); }
.sectors .os { display: none; margin: 18px 0 0; font: 400 clamp(26px, 2.6vw, 38px)/1 var(--display); letter-spacing: -.035em; }
.sectors.all .os { display: block; }
.sectors .os b { font-weight: 400; color: var(--accent); }

.sound {
  position: absolute; z-index: 2; right: var(--gutter); bottom: 72px;
  appearance: none; cursor: pointer; min-height: 44px; padding: 0 16px; border-radius: 999px;
  background: rgba(6,6,6,.35); color: var(--ink-soft); border: 1px solid var(--rule); font: 400 14px/1 var(--text);
}
.sound:hover { color: var(--ink); }

@media (max-width: 1024px) {
  .hero { flex-direction: column; align-items: stretch; justify-content: space-between; padding-top: 84px; }
  .sectors { position: relative; z-index: 2; top: auto; right: auto; left: auto; transform: none; width: auto; min-height: 196px; padding: 0 var(--gutter); }
  .sector-name { font-size: 24px; margin-bottom: 10px; }
  .sector ul { gap: 6px; }
  .sector li { font-size: 15px; }
  .sectors.all .sector-name { font-size: 17px; margin-bottom: 4px; }
  .sectors .os { font-size: 24px; margin-top: 10px; }
  .hero-copy { margin-top: 28px; padding-bottom: 104px; }
  .sound { bottom: 28px; right: auto; left: var(--gutter); }
}
@media (max-width: 420px) {
  .top { padding-top: 20px; gap: 12px; }
  .top nav a[data-luz] { display: none; }
  .brand { font-size: 17px; }
  .hero { padding-top: 72px; }
  .hero h1 { font-size: 34px; }
}

/* La torre en corte: de los sistemas que ya existen hacia arriba */
.tower { padding: 140px var(--gutter) 150px; border-top: 1px solid var(--rule); }
.tower h2 { margin: 0; max-width: 15em; font: 400 clamp(32px, 4.2vw, 60px)/1.02 var(--display); letter-spacing: -.04em; text-wrap: balance; }
.tower > p { margin: 20px 0 0; max-width: 36em; color: var(--ink-soft); }
.floors { margin: 72px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column-reverse; max-width: 1100px; }
.floors li { transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); transition-delay: calc(var(--i, 0) * 140ms); display: grid; grid-template-columns: minmax(180px, 22%) 1fr; gap: 8px 40px; padding: 26px 0; border-top: 1px solid var(--rule); }
.floors li:first-child { border-bottom: 1px solid var(--rule); background: linear-gradient(to right, rgba(39,48,42,.55), rgba(39,48,42,0) 70%); }
.floors h3 { margin: 0; font: 400 22px/1.2 var(--display); letter-spacing: -.02em; }
.floors p { margin: 0; color: var(--ink-soft); max-width: 40em; }
@media (max-width: 760px) {
  .tower { padding: 88px var(--gutter) 96px; }
  .floors { margin-top: 48px; }
  .floors li { grid-template-columns: 1fr; padding: 22px 0; }
}

.foot { padding: 40px var(--gutter) 56px; border-top: 1px solid var(--rule); display: flex; flex-wrap: wrap; gap: 12px 32px; color: var(--ink-mute); font-size: 14px; }
.foot .sig { color: var(--ink-soft); font-family: var(--display); }
.foot a { color: var(--ink-mute); }

.js .floors[data-reveal] li { opacity: 0; transform: translateY(18px); }
.js .floors[data-reveal].in li { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .floors[data-reveal] li { opacity: 1; transform: none; transition: none; }
  .sector li { transition: none; }
  .sector.active .sector-name { animation: none; }
  .sector li, .sector li::after { transition: none; }
}