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

html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { position: relative; z-index: 1; overflow-x: clip; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
svg { display: block; }
::selection { background: var(--amber); color: #0b0b0b; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 4px; border-radius: 4px; }

/* Lienzo WebGL: fijo detrás de todo */
#gl {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh; height: 100lvh;
  z-index: 0; display: block; pointer-events: none;
}
.no-webgl #gl { display: none; }

/* Tipografía */
.display {
  font-family: var(--f-display);
  font-weight: 800;
  font-stretch: 125%;
  text-transform: uppercase;
  line-height: .9;
  letter-spacing: -0.012em;
}
.eyebrow, .sec__tag, .mono {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* Texto dividido en palabras/caracteres (ver ui/split.js) */
.w {
  display: inline-block;
  white-space: nowrap; /* una palabra nunca se parte dentro de su máscara */
  overflow: hidden;
  vertical-align: top;
  padding: .06em .03em .1em;
  margin: -.06em -.03em -.1em;
}
.c { display: inline-block; will-change: transform; }

/* Navegación */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 18px var(--gutter);
  color: var(--ink);
  transition: color .4s;
}
.nav__brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-stretch: 125%;
  font-size: 11px; line-height: 1.02; letter-spacing: .03em;
}
.nav__brand svg { width: 30px; height: 30px; color: var(--amber); }
.nav__links {
  display: flex; gap: clamp(18px, 2.4vw, 32px);
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
}
.nav__links a { color: var(--ink-2); transition: color .3s; }
.nav__links a:hover { color: var(--ink); }
.nav__end { display: flex; align-items: center; gap: 14px; }

.lang {
  display: flex; padding: 3px; gap: 2px;
  border: 1px solid var(--line); border-radius: 999px;
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .1em;
}
.lang button {
  padding: 6px 9px; border-radius: 999px; color: var(--ink-3);
  transition: background .3s, color .3s;
}
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.lang button:not([aria-pressed="true"]):hover { color: var(--ink); }

.nav__cta {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  padding: 10px 16px; border: 1px solid var(--line); border-radius: 999px;
  transition: background .3s, color .3s, border-color .3s;
}
.nav__cta:hover { background: var(--amber); color: #0b0b0b; border-color: var(--amber); }

body.is-light .nav { color: var(--paper-ink); }
body.is-light .nav__links a { color: var(--paper-ink-2); }
body.is-light .nav__links a:hover { color: var(--paper-ink); }
body.is-light .lang, body.is-light .nav__cta { border-color: var(--paper-line); }
body.is-light .lang button { color: var(--paper-ink-2); }
body.is-light .lang button[aria-pressed="true"] { background: var(--paper-ink); color: var(--paper); }

/* Menú móvil */
.nav__burger { display: none; position: relative; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 999px; }
.nav__burger i { position: absolute; left: 12px; right: 12px; height: 1.5px; background: currentColor; transition: transform .35s, top .35s; }
.nav__burger i:first-child { top: 15px; }
.nav__burger i:last-child { top: 23px; }
.nav__burger[aria-expanded="true"] i:first-child { top: 19px; transform: rotate(45deg); }
.nav__burger[aria-expanded="true"] i:last-child { top: 19px; transform: rotate(-45deg); }
body.is-light .nav__burger { border-color: var(--paper-line); }

.mnav {
  position: fixed; inset: 0; z-index: 45;
  display: flex; flex-direction: column; justify-content: center; gap: 36px;
  padding: 96px var(--gutter) 40px;
  background: var(--bg); color: var(--ink);
  overflow-y: auto; overscroll-behavior: contain;
}
.mnav[hidden] { display: none; }
.mnav__list { list-style: none; display: flex; flex-direction: column; }
.mnav__list a {
  display: flex; align-items: baseline; gap: 16px; padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--f-display); font-weight: 800; font-stretch: 125%;
  font-size: clamp(24px, 7vw, 34px); line-height: 1.1; text-transform: uppercase;
}
.mnav__list a:hover, .mnav__list a:focus-visible { color: var(--amber); }
.mnav__n { font-family: var(--f-mono); font-size: 11px; font-weight: 400; letter-spacing: .14em; color: var(--amber); }
.mnav__cta {
  align-self: flex-start;
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  padding: 14px 22px; border-radius: 999px; background: var(--amber); color: #0b0b0b;
}
@media (prefers-reduced-motion: no-preference) {
  .mnav:not([hidden]) { animation: mnavIn .35s ease-out; }
  @keyframes mnavIn { from { opacity: 0; } }
}
/* Con el menú abierto la barra siempre en tinta clara, aunque la sección de atrás sea clara. */
body.menu-open .nav { color: var(--ink); }
body.menu-open .lang, body.menu-open .nav__burger { border-color: var(--line); }
body.menu-open .lang button { color: var(--ink-3); }
body.menu-open .lang button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__burger { display: block; }
}
@media (max-width: 520px) {
  .nav { padding-top: 14px; padding-bottom: 14px; }
  .nav__cta { display: none; }
}

/* HUD: sección actual + progreso */
.hud {
  position: fixed; left: var(--gutter); bottom: 22px; z-index: 40;
  display: flex; align-items: center; gap: 12px;
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-2); pointer-events: none; transition: color .4s;
}
.hud.is-hidden { opacity: 0; }
.hud { transition: color .4s, opacity .4s; }
.hud__num { color: var(--ink); transition: color .4s; }
.hud__sep { width: 28px; height: 1px; background: currentColor; opacity: .5; }
.hud__bar {
  position: fixed; right: calc(var(--gutter) * .5); top: 50%; z-index: 40;
  width: 1px; height: 120px; transform: translateY(-50%);
  background: var(--line); pointer-events: none;
}
.hud__bar i {
  position: absolute; inset: 0; background: var(--amber);
  transform-origin: top; transform: scaleY(0);
}
body.is-light .hud { color: var(--paper-ink-2); }
body.is-light .hud__num { color: var(--paper-ink); }
body.is-light .hud__bar { background: var(--paper-line); }

/* Cursor propio (solo puntero fino) */
.cursor {
  position: fixed; left: 0; top: 0; z-index: 100;
  width: 10px; height: 10px; margin: -5px 0 0 -5px;
  border-radius: 50%; background: var(--amber);
  pointer-events: none; opacity: 0;
  transition: width .35s var(--ease-out), height .35s var(--ease-out), margin .35s var(--ease-out),
              background-color .3s, border-color .3s, opacity .3s;
  border: 1px solid transparent;
}
.cursor.is-on { opacity: 1; }
.cursor.is-hover {
  width: 46px; height: 46px; margin: -23px 0 0 -23px;
  background-color: transparent; border-color: var(--amber);
}
@media (pointer: coarse) { .cursor { display: none; } }

/* Secciones con escenario fijo (sticky) */
.sec { position: relative; height: calc(var(--len, 100) * 1vh); }
.stage {
  position: sticky; top: 0;
  height: 100vh; height: 100svh;
  overflow: hidden;
}
.sec__tag {
  position: absolute; top: var(--edge-top); left: var(--gutter);
  color: var(--ink-3);
}

@media (prefers-reduced-motion: reduce) {
  .cursor { display: none; }
  * { scroll-behavior: auto !important; }
}