?/* ============================================================
   EL SISTEMA — rework cinematográfico.
   Dark permanente: la luz es la lección, no el fondo.
   Consume tokens de tokens.css.
   ============================================================ */

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

:root {
  --font-sans: 'InterVariable', 'Inter Variable', 'Inter', system-ui, sans-serif;
  --font-display: 'Clash Display', var(--font-sans);
  --bg: #06050c;
  --surface-glass: color-mix(in oklch, oklch(16% 0.03 var(--hue)) 55%, transparent);
  --line: oklch(100% 0 0 / 0.09);
  --line-bright: oklch(100% 0 0 / 0.2);
  --ink: oklch(96% 0.01 var(--hue));
  --ink-dim: oklch(72% 0.02 var(--hue));
  --ink-faint: oklch(52% 0.02 var(--hue));
  --brand: oklch(68% 0.19 var(--hue));
  --brand-hot: oklch(75% 0.17 var(--hue));
  --accent: oklch(78% 0.14 calc(var(--hue) + 100));
}

html { scroll-behavior: auto; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  cursor: none;
}
@media (pointer: coarse) { body { cursor: auto; } }

h1, h2, h3, h4, p { margin: 0; }
a { color: var(--brand-hot); }
button { font: inherit; color: inherit; cursor: none; }
@media (pointer: coarse) { button { cursor: pointer; } }
code, kbd { font: var(--font-code); }
code { background: oklch(100% 0 0 / 0.07); padding: 0.1em 0.4em; border-radius: var(--radius-small); color: var(--brand-hot); }
kbd { border: 1px solid var(--line-bright); border-bottom-width: 2px; border-radius: var(--radius-small); padding: 0.05em 0.5em; }
em { font-style: italic; }
::selection { background: var(--brand); color: #fff; }

:where(button, a, input, [tabindex]):focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* �?�?�?�?�?�? MUNDO + GRANO �?�?�?�?�?�? */
#world {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}
.noise {
  position: fixed; inset: -50%;
  z-index: 2;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 900ms steps(4) infinite;
}
@keyframes grain {
  0% { transform: translate(0, 0); } 25% { transform: translate(-2%, 3%); }
  50% { transform: translate(3%, -2%); } 75% { transform: translate(-3%, -3%); }
}
@media (prefers-reduced-motion: reduce) { .noise { animation: none; } }

main { position: relative; z-index: 3; }

/* �?�?�?�?�?�? LOADER �?�?�?�?�?�? */
.loader {
  position: fixed; inset: 0;
  z-index: 200;
  background: var(--bg);
  display: grid; place-items: center;
}
.loader__core { text-align: center; display: grid; gap: var(--space-200); }
.loader__glyph { font-size: 2.4rem; color: var(--brand-hot); animation: pulse 1.2s var(--motion-easing-inout-bold) infinite; }
@keyframes pulse { 50% { transform: scale(1.25) rotate(45deg); opacity: 0.6; } }
.loader__count {
  font: 600 4.5rem/1 var(--font-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}
.loader__label {
  font: var(--font-code); font-size: 0.72rem;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--ink-faint);
}

/* �?�?�?�?�?�? CURSOR �?�?�?�?�?�? */
.cursor { position: fixed; inset: 0; z-index: 150; pointer-events: none; }
@media (pointer: coarse) { .cursor { display: none; } }
.cursor__dot {
  position: absolute;
  width: 6px; height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--brand-hot);
}
.cursor__ring {
  position: absolute;
  width: 44px; height: 44px;
  margin: -22px 0 0 -22px;
  border: 1px solid var(--line-bright);
  border-radius: 50%;
  display: grid; place-items: center;
  transition: scale var(--motion-duration-medium) var(--motion-easing-out-bold),
              background var(--motion-duration-medium) linear,
              border-color var(--motion-duration-medium) linear;
}
.cursor.is-hover .cursor__ring {
  scale: 1.6;
  background: color-mix(in oklch, var(--brand) 22%, transparent);
  border-color: var(--brand);
}
.cursor__label {
  font: var(--font-code); font-size: 0.55rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  opacity: 0;
  transition: opacity var(--motion-duration-short) linear;
}
.cursor.is-hover .cursor__label { opacity: 1; }

/* �?�?�?�?�?�? HUD �?�?�?�?�?�? */
.hud {
  position: fixed; inset: 0 0 auto 0;
  z-index: 100;
  display: flex; align-items: center; gap: var(--space-400);
  padding: var(--space-200) clamp(16px, 3vw, 40px);
  mix-blend-mode: normal;
}
.hud__brand {
  font: 600 0.9rem/1 var(--font-display);
  letter-spacing: 0.18em;
  color: var(--ink);
  text-decoration: none;
}
.hud__chapter {
  margin-inline: auto;
  font: var(--font-code); font-size: 0.72rem;
  letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--ink-dim);
  display: flex; gap: var(--space-150); align-items: baseline;
}
.hud__chapter em { font-style: normal; color: var(--brand-hot); }
.hud__hint { font: var(--font-code); font-size: 0.68rem; color: var(--ink-faint); }
@media (width < 700px) { .hud__hint { display: none; } }
.hud__progress {
  position: absolute; inset: auto 0 0 0;
  height: 1px;
  background: var(--line);
}
.hud__progress i {
  display: block; height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transform-origin: left;
  transform: scaleX(0);
}

/* �?�?�?�?�?�? GRID OVERLAY �?�?�?�?�?�? */
.grid-overlay {
  position: fixed; inset: 0; z-index: 90;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--motion-duration-medium) var(--motion-easing-out-practical);
}
.grid-overlay.is-on { opacity: 1; }
.grid-overlay__inner {
  height: 100%;
  max-width: var(--layout-fixed-wide);
  margin-inline: auto;
  padding-inline: var(--layout-margin);
  display: grid; grid-template-columns: repeat(12, 1fr);
  gap: var(--layout-gutter);
}
.grid-overlay__inner i {
  background: color-mix(in oklch, var(--brand) 7%, transparent);
  border-inline: 1px solid color-mix(in oklch, var(--brand) 20%, transparent);
}

/* �?�?�?�?�?�? CAP�?TULOS �?�?�?�?�?�? */
.ch {
  position: relative;
  max-width: var(--layout-fixed-wide);
  margin-inline: auto;
  padding: clamp(90px, 16vh, 160px) clamp(16px, 3vw, 40px);
}
.ch__num {
  font: var(--font-code); font-size: 0.78rem;
  letter-spacing: 0.5em;
  color: var(--accent);
}
.ch__title {
  font: 600 clamp(3.4rem, 1.2rem + 11vw, 9.5rem)/0.94 var(--font-display);
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin-block: var(--space-150) var(--space-400);
  overflow: hidden;
}
.ch__title .char { display: inline-block; }
.ch__lede {
  max-width: 62ch;
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.2rem);
  line-height: 1.65;
  color: var(--ink-dim);
  text-wrap: pretty;
}
.ch__lede code { font-size: 0.85em; }
.ch__head { margin-block-end: clamp(48px, 8vh, 90px); }

/* split helpers */
[data-split] .line { display: block; overflow: hidden; }
.hero__row--outline, .outro__title .hero__row--outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
}

/* �?�?�?�?�?�? HERO �?�?�?�?�?�? */
.ch--hero {
  min-height: 100svh;
  display: grid; place-items: center;
  text-align: center;
  max-width: none;
}
.hero__pre {
  font: var(--font-code); font-size: 0.78rem;
  letter-spacing: 0.35em; text-transform: uppercase;
  color: var(--ink-dim);
  margin-block-end: var(--space-400);
}
.hero__title {
  font: 700 clamp(4.2rem, 2rem + 14vw, 13rem)/0.9 var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.hero__row { display: block; overflow: hidden; }
.hero__row .char { display: inline-block; transform: translateY(110%); }
.hero__post {
  max-width: 52ch;
  margin: var(--space-500) auto 0;
  color: var(--ink-dim);
  text-wrap: pretty;
}
.hero__scroll {
  position: absolute; inset: auto 0 clamp(20px, 4vh, 44px) 0;
  display: grid; place-items: center; gap: var(--space-100);
  font: var(--font-code); font-size: 0.65rem;
  letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--ink-faint);
}
.hero__scroll i {
  width: 1px; height: 52px;
  background: linear-gradient(var(--brand-hot), transparent);
  animation: drop 1.8s var(--motion-easing-inout-bold) infinite;
}
@keyframes drop { from { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); } to { transform: scaleY(0); transform-origin: bottom; } }

/* �?�?�?�?�?�? INTERLUDIO �?�?�?�?�?�? */
.ch--interlude { max-width: none; padding: 0; height: 260vh; }
.interlude__pin {
  position: sticky; top: 0;
  height: 100svh;
  display: grid; place-items: center;
  text-align: center;
  padding-inline: clamp(16px, 4vw, 60px);
}
.interlude__line {
  grid-area: 1 / 1;
  max-width: 24ch;
  font: 500 clamp(1.6rem, 1rem + 3.4vw, 3.4rem)/1.2 var(--font-display);
  opacity: 0;
  text-wrap: balance;
}
.interlude__line em { color: var(--brand-hot); font-style: normal; }
.interlude__line--big em { color: var(--accent); }

/* �?�?�?�?�?�? PANELES �?�?�?�?�?�? */
.panel {
  position: relative;
  background: var(--surface-glass);
  backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid var(--line);
  border-radius: var(--radius-xxlarge);
  padding: clamp(24px, 4vw, 48px);
  margin-block-start: clamp(32px, 5vh, 56px);
}
.panel__tag {
  font: var(--font-code); font-size: 0.68rem;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--accent);
  margin-block-end: var(--space-400);
}
.panel__note {
  font-size: 0.85rem; line-height: 1.6;
  color: var(--ink-faint);
  margin-block-start: var(--space-300);
  max-width: 78ch;
  text-wrap: pretty;
}
.panel__note b { color: var(--ink-dim); }
.panel--split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: clamp(24px, 4vw, 56px); align-items: center; }
.panel__prose { display: grid; gap: var(--space-300); color: var(--ink-dim); max-width: 52ch; }
.panel__prose b, .panel__prose strong { color: var(--ink); }

/* �?�?�?�?�?�? 01 TOKENS �?�?�?�?�?�? */
.token-anatomy {
  font: var(--font-code);
  font-size: clamp(1.2rem, 0.5rem + 3.4vw, 2.6rem);
  overflow-wrap: anywhere;
  margin-block-end: var(--space-400);
}
.token-anatomy b { color: var(--ink-faint); }
.ta { border-bottom: 3px solid currentColor; padding-bottom: 3px; position: relative; }
.ta--f { color: var(--brand-hot); }
.ta--p { color: var(--accent); }
.ta--m { color: oklch(70% 0.19 25); }
.ta--s { color: oklch(80% 0.15 85); }
.ta:hover::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 12px); left: 50%;
  translate: -50% 0;
  width: max-content; max-width: 40ch;
  background: oklch(14% 0.03 var(--hue));
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-large);
  box-shadow: var(--elevation-shadow-overlay);
  padding: var(--space-150) var(--space-250);
  font-size: 0.8rem; line-height: 1.5;
  color: var(--ink);
  z-index: 10;
}
.token-legend {
  list-style: none; margin: 0 0 var(--space-300); padding: 0;
  display: flex; flex-wrap: wrap; gap: var(--space-300);
  font: var(--font-code); font-size: 0.72rem;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--ink-dim);
}
.token-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; background: currentColor; margin-inline-end: 8px; }
.token-legend .ta--f, .token-legend .ta--p, .token-legend .ta--m, .token-legend .ta--s { border: none; }

.demo-card {
  color-scheme: light;
  background: var(--elevation-surface-raised);
  color: var(--color-text);
  border-radius: var(--radius-xlarge);
  box-shadow: var(--elevation-shadow-raised);
  padding: var(--space-400);
  display: grid; gap: var(--space-150); justify-items: start;
  max-width: 340px;
  margin-block-end: var(--space-300);
  transition: background 400ms var(--motion-easing-inout-bold), color 400ms var(--motion-easing-inout-bold);
}
.demo-card.is-dark { color-scheme: dark; }
.demo-card p { color: var(--color-text-subtle); font-size: 0.9rem; }

/* �?�?�?�?�?�? 02 COLOR �?�?�?�?�?�? */
.hue-scrub { margin-block-start: clamp(32px, 5vh, 56px); }
.hue-scrub__value {
  font: 600 clamp(2rem, 1rem + 4vw, 4rem)/1 var(--font-display);
  margin-block-end: var(--space-300);
}
.hue-scrub__value output { color: var(--brand-hot); font-variant-numeric: tabular-nums; }
.hue-scrub__ramp {
  display: grid; grid-template-columns: repeat(12, 1fr);
  height: clamp(64px, 12vh, 110px);
  border-radius: var(--radius-large);
  overflow: clip;
  border: 1px solid var(--line);
}
.hue-scrub__ramp i { background: oklch(var(--l) var(--c) var(--hue)); }
.roles-line { display: flex; flex-wrap: wrap; gap: var(--space-150); }
.lz {
  font: 600 0.8rem/1 var(--font-sans);
  font-style: normal;
  padding: 0.5em 0.9em;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.lz--neutral   { background: oklch(100% 0 0 / 0.08); color: var(--ink-dim); }
.lz--brand     { background: color-mix(in oklch, var(--brand) 22%, transparent); color: var(--brand-hot); }
.lz--info      { background: oklch(64% 0.15 240 / 0.2); color: oklch(75% 0.12 240); }
.lz--success   { background: oklch(64% 0.16 152 / 0.2); color: oklch(75% 0.14 152); }
.lz--warning   { background: oklch(78% 0.15 80 / 0.22); color: oklch(82% 0.13 85); }
.lz--danger    { background: oklch(60% 0.2 25 / 0.2); color: oklch(74% 0.16 25); }
.lz--discovery { background: oklch(60% 0.18 300 / 0.2); color: oklch(76% 0.14 300); }
.lz--accent    { background: color-mix(in oklch, var(--accent) 22%, transparent); color: var(--accent); }

.contrast-lab {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(20px, 3vw, 48px);
  align-items: center;
}
@media (width < 820px) { .contrast-lab { grid-template-columns: 1fr; } }
.contrast-lab__ctl { display: grid; gap: var(--space-200); font: 600 0.8rem/1 var(--font-sans); }
.contrast-lab__ctl input[type='color'] {
  width: 72px; height: 44px;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-medium);
  background: none; padding: 3px;
  display: block; margin-top: 6px;
  cursor: none;
}
.metric {
  font: 600 clamp(2.2rem, 1.6rem + 2vw, 3.4rem)/1 var(--font-display);
  font-variant-numeric: tabular-nums;
}
.contrast-lab__prev {
  border-radius: var(--radius-xlarge);
  padding: clamp(20px, 3vw, 40px);
  transition: background 150ms linear, color 150ms linear;
}
.cp-big { font: 700 1.6rem/1.2 var(--font-display); }
.contrast-lab__prev p:last-child { font-size: 0.9rem; margin-top: var(--space-100); }
.wcag { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-150); font: var(--font-code); font-size: 0.75rem; }
.wcag li { padding-left: 1.7em; position: relative; color: var(--ink-dim); }
.wcag li::before { content: '✕'; position: absolute; left: 0; color: oklch(65% 0.18 25); font-weight: 700; }
.wcag li.pass::before { content: '✓'; color: oklch(72% 0.15 152); }

/* �?�?�?�?�?�? 03 TIPO �?�?�?�?�?�? */
.type-scrub {
  height: 220vh;
  margin-block: clamp(-40px, -4vh, -60px) 0;
}
.type-scrub__word {
  position: sticky; top: 0;
  height: 100svh;
  display: grid; place-items: center;
  font-family: var(--font-sans);
  font-size: clamp(5rem, 24vw, 22rem);
  line-height: 1;
  font-weight: 100;
  font-variation-settings: 'wght' var(--wght, 100);
  letter-spacing: -0.02em;
}
.type-lab { display: grid; grid-template-columns: minmax(220px, 300px) 1fr; gap: clamp(24px, 4vw, 56px); }
@media (width < 760px) { .type-lab { grid-template-columns: 1fr; } }
.type-lab__ctl, .lab-ctl { font: 600 0.8rem/1.4 var(--font-sans); }
.type-lab__ctl output, .lab-ctl output { color: var(--brand-hot); }
.type-lab__stage { display: grid; gap: var(--space-150); overflow: clip; align-content: center; }
.tsx {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs, 1rem);
  line-height: 1.15;
  white-space: nowrap;
  transition: font-size var(--motion-duration-short) var(--motion-easing-out-practical);
}
.tsx[data-step='0'], .tsx[data-step='-1'] { font-family: var(--font-sans); font-weight: 400; white-space: normal; max-width: 55ch; }
.tsx[data-step='-1'] { color: var(--ink-faint); }
.measure { max-width: var(--measure); font-size: 0.95rem; color: var(--ink-dim); transition: max-width 80ms linear; }

input[type='range'] {
  appearance: none;
  width: 100%; height: 3px;
  border-radius: 99px;
  background: var(--line-bright);
  margin-block: var(--space-200);
  cursor: none;
}
input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--brand-hot);
  box-shadow: 0 0 16px color-mix(in oklch, var(--brand) 70%, transparent);
}
input[type='range']::-moz-range-thumb { width: 16px; height: 16px; border: none; border-radius: 50%; background: var(--brand-hot); }
label:has(> input[type='range']) { display: block; }

/* �?�?�?�?�?�? 04 ESPACIO �?�?�?�?�?�? */
.breath { height: 240vh; }
.breath__stage {
  position: sticky; top: 12vh;
  display: grid; gap: var(--gap, 8px);
  max-width: 460px;
  margin-inline: auto;
}
.breath__group { display: grid; gap: var(--space-100); }
.breath__group h4 { font: 600 0.8rem/1 var(--font-sans); color: var(--ink-dim); }
.ghost-input {
  height: 44px;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-medium);
  background: oklch(100% 0 0 / 0.03);
}
.ghost-input--s { width: 40%; }
.breath__caption {
  position: sticky; top: calc(12vh + 420px);
  max-width: 460px; margin: var(--space-400) auto 0;
  font-size: 0.82rem; color: var(--ink-faint);
  text-align: center; text-wrap: pretty;
}
.breath__caption span { color: var(--brand-hot); font-variant-numeric: tabular-nums; }

.space-scale { display: grid; gap: var(--space-150); }
.ss { display: grid; grid-template-columns: 52px auto 1fr; align-items: center; gap: var(--space-200); }
.ss i { width: var(--w); height: 20px; background: linear-gradient(180deg, var(--brand-hot), var(--brand)); border-radius: 2px; box-shadow: 0 0 12px color-mix(in oklch, var(--brand) 40%, transparent); }
.ss b { font: var(--font-code); font-size: 0.68rem; color: var(--accent); letter-spacing: 0.2em; }

/* �?�?�?�?�?�? 05 ELEVACIÓN �?�?�?�?�?�? */
.elev-stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
  gap: var(--space-300);
  margin-block-start: clamp(32px, 5vh, 56px);
  perspective: 1200px;
}
.elev {
  border-radius: var(--radius-xlarge);
  padding: var(--space-400);
  display: grid; gap: var(--space-100); align-content: start;
  font-size: 0.85rem;
  transition: translate var(--motion-duration-medium) var(--motion-easing-out-bold);
}
.elev:hover { translate: 0 -8px; }
.elev p { color: var(--ink-faint); }
.elev--sunken  { background: oklch(7% 0.015 var(--hue)); border: 1px solid var(--line); }
.elev--default { background: oklch(11% 0.02 var(--hue)); border: 1px solid var(--line); }
.elev--raised  { background: oklch(15% 0.025 var(--hue)); box-shadow: var(--elevation-shadow-raised); }
.elev--overlay { background: oklch(20% 0.03 var(--hue)); box-shadow: var(--elevation-shadow-overlay); translate: 0 -6px; }

.shadow-lab { display: grid; grid-template-columns: minmax(210px, 280px) 1fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
@media (width < 760px) { .shadow-lab { grid-template-columns: 1fr; } }
.shadow-lab__ctl { display: grid; gap: var(--space-050); font: 600 0.8rem/1.3 var(--font-sans); }
.shadow-lab__ctl output { color: var(--brand-hot); }
.shadow-lab__stage { display: grid; place-items: center; padding-block: var(--space-400); }
.shadow-card {
  background: oklch(17% 0.03 var(--hue));
  border-radius: var(--radius-xlarge);
  padding: var(--space-400);
  max-width: 320px;
  display: grid; gap: var(--space-100);
}
.shadow-card p { font-size: 0.85rem; color: var(--ink-dim); }
.shadow-css {
  grid-column: 1 / -1;
  font-size: 0.7rem; line-height: 1.7;
  white-space: pre; overflow-x: auto;
  padding: var(--space-250);
  border-radius: var(--radius-large);
  background: oklch(0% 0 0 / 0.35);
  color: var(--ink-dim);
}

/* �?�?�?�?�?�? 06 MOTION �?�?�?�?�?�? */
.motion-lab { display: grid; grid-template-columns: minmax(230px, 300px) 1fr; gap: clamp(24px, 4vw, 56px); }
@media (width < 800px) { .motion-lab { grid-template-columns: 1fr; } }
.motion-lab__ctl { display: grid; gap: var(--space-300); align-content: start; }
.seg { display: grid; gap: 3px; background: oklch(100% 0 0 / 0.05); padding: 4px; border-radius: var(--radius-large); }
.seg__btn {
  border: none; background: transparent;
  padding: var(--space-100) var(--space-200);
  border-radius: var(--radius-medium);
  font: var(--font-code); font-size: 0.75rem;
  color: var(--ink-dim);
  text-align: start;
  transition: background var(--motion-duration-xxshort) linear, color var(--motion-duration-xxshort) linear;
}
.seg__btn:hover { color: var(--ink); }
.seg__btn.is-active { background: color-mix(in oklch, var(--brand) 25%, transparent); color: var(--ink); }
.motion-lab__stage { display: grid; gap: var(--space-300); align-content: start; }
.bezier { width: min(190px, 100%); background: oklch(0% 0 0 / 0.3); border: 1px solid var(--line); border-radius: var(--radius-large); }
.bezier__diag { stroke: var(--line-bright); stroke-width: 1; fill: none; }
.bezier__curve { stroke: var(--brand-hot); stroke-width: 3; fill: none; stroke-linecap: round; filter: drop-shadow(0 0 6px var(--brand)); }
.motion-track {
  height: 52px;
  border-radius: 99px;
  background: oklch(0% 0 0 / 0.3);
  border: 1px solid var(--line);
  position: relative; overflow: clip;
}
.motion-ball {
  position: absolute; top: 50%; left: 8px;
  translate: 0 -50%;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-hot), var(--accent));
  box-shadow: 0 0 24px color-mix(in oklch, var(--brand) 60%, transparent);
}
.motion-ball.is-playing { animation: slide var(--dur, 250ms) var(--ease, cubic-bezier(0.4,1,0.6,1)) forwards; }
@keyframes slide { to { left: calc(100% - 44px); } }
.motion-css { font-size: 0.72rem; padding: var(--space-200); border-radius: var(--radius-large); background: oklch(0% 0 0 / 0.35); color: var(--ink-dim); }

.flag-stage { min-height: 84px; display: grid; justify-items: end; align-items: start; margin-block-start: var(--space-300); }
.flag {
  background: oklch(19% 0.03 var(--hue));
  box-shadow: var(--elevation-shadow-overlay);
  border-radius: var(--radius-large);
  border-inline-start: 3px solid oklch(70% 0.15 152);
  padding: var(--space-200) var(--space-300);
  display: flex; gap: var(--space-150); align-items: center;
  font-size: 0.82rem;
  max-width: 380px;
}
.flag.enter { animation: flagIn 250ms var(--motion-easing-out-bold) both; }
.flag.exit { animation: flagOut 200ms var(--motion-easing-in-practical) both; }
@keyframes flagIn { from { opacity: 0; transform: translateX(48px); } }
@keyframes flagOut { to { opacity: 0; transform: translateX(24px); } }

/* �?�?�?�?�?�? 07 GESTALT �?�?�?�?�?�? */
.g-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: var(--space-300);
}
.g-card {
  background: var(--surface-glass);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xlarge);
  padding: var(--space-400);
  transition: border-color var(--motion-duration-medium) linear, translate var(--motion-duration-medium) var(--motion-easing-out-bold);
}
.g-card:hover { border-color: color-mix(in oklch, var(--brand) 50%, transparent); translate: 0 -6px; }
.g-card h4 { font: 600 1.05rem/1 var(--font-display); margin-block-end: var(--space-250); }
.g-card p { font-size: 0.84rem; color: var(--ink-faint); margin-block-start: var(--space-250); }
.g-demo {
  height: 110px;
  border-radius: var(--radius-large);
  background: oklch(0% 0 0 / 0.3);
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-150);
  padding: var(--space-200);
}
.g-demo i { width: 20px; height: 20px; border-radius: 50%; background: var(--ink-faint); flex: none; }
.g-prox span { width: 40px; }
.g-sim i.alt { background: var(--brand-hot); border-radius: 4px; }
.g-closure { height: 86px; }
.g-closure circle { stroke: var(--ink-dim); }
.g-fg { background: oklch(4% 0.01 var(--hue)); }
.g-fg__chip {
  background: oklch(22% 0.04 var(--hue));
  box-shadow: var(--elevation-shadow-overlay);
  border-radius: var(--radius-large);
  padding: var(--space-150) var(--space-400);
  font-size: 0.82rem; font-weight: 600;
}
.g-region__box { display: flex; gap: var(--space-150); border: 2px solid var(--line-bright); border-radius: var(--radius-large); padding: var(--space-150); }
.g-focal i.pop { background: oklch(66% 0.2 25); scale: 1.3; box-shadow: 0 0 18px oklch(60% 0.2 25 / 0.6); }

/* �?�?�?�?�?�? 08 ARCHIVO �?�?�?�?�?�? */
.ch--archive { max-width: none; padding: 0; }
.archive__pin {
  height: 100svh;
  overflow: clip;
  display: grid;
  align-content: center;
  gap: clamp(24px, 4vh, 56px);
}
.archive__head { padding-inline: clamp(16px, 3vw, 40px); display: flex; align-items: baseline; gap: var(--space-400); flex-wrap: wrap; }
.archive__head .ch__title { margin: 0; font-size: clamp(2.6rem, 1rem + 7vw, 6rem); }
.archive__hint { font: var(--font-code); font-size: 0.7rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--ink-faint); }
.archive__track {
  display: flex; gap: clamp(16px, 2vw, 32px);
  padding-inline: clamp(16px, 3vw, 40px);
  width: max-content;
  will-change: transform;
}
.a-card {
  width: min(78vw, 460px);
  flex: none;
  background: var(--surface-glass);
  backdrop-filter: blur(18px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xxlarge);
  padding: clamp(24px, 3vw, 40px);
  display: grid; gap: var(--space-300); align-content: start;
}
.a-card h3 { font: 600 1.6rem/1 var(--font-display); }
.a-card > p { font-size: 0.84rem; color: var(--ink-faint); }
.a-card--last { background: color-mix(in oklch, var(--brand) 14%, transparent); border-color: color-mix(in oklch, var(--brand) 40%, transparent); }
.a-manifesto { font: 600 1.5rem/1.25 var(--font-display); }

.btn {
  padding: var(--space-100) var(--space-300);
  min-height: 42px;
  border: none;
  border-radius: var(--radius-medium);
  font-weight: 600; font-size: 0.9rem;
  transition: background var(--motion-duration-xxshort) linear, transform var(--motion-duration-xxshort) var(--motion-easing-out-practical), box-shadow var(--motion-duration-short) linear;
}
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: var(--opacity-disabled); }
.btn--brand { background: var(--brand); color: #fff; }
.btn--brand:hover:not(:disabled) { background: var(--brand-hot); box-shadow: 0 6px 24px color-mix(in oklch, var(--brand) 50%, transparent); }
.btn--subtle { background: oklch(100% 0 0 / 0.09); color: var(--ink); }
.btn--subtle:hover { background: oklch(100% 0 0 / 0.14); }
.btn--ghost { background: transparent; color: var(--brand-hot); }
.btn--ghost:hover { background: color-mix(in oklch, var(--brand) 15%, transparent); }
.btn--danger { background: oklch(56% 0.19 25); color: #fff; }
.btn--danger:hover { background: oklch(62% 0.2 25); }
.btn-stack { display: grid; gap: var(--space-150); justify-items: start; }

.fld { display: grid; gap: var(--space-075); font: 600 0.8rem/1 var(--font-sans); }
.fld input {
  font: 400 0.95rem/1 var(--font-sans);
  padding: var(--space-150);
  border: 1px solid var(--line-bright);
  border-radius: var(--radius-medium);
  background: oklch(0% 0 0 / 0.3);
  color: var(--ink);
  width: 100%;
}
.fld input:focus-visible { outline: none; border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand); }
.fld.is-error input { border-color: oklch(60% 0.2 25); box-shadow: 0 0 0 1px oklch(60% 0.2 25); }
.fld__msg { font-weight: 400; min-height: 1.2em; color: oklch(70% 0.17 25); }
.fld.is-ok .fld__msg { color: oklch(72% 0.15 152); }

.icon-demo { width: min(200px, 60%); background: oklch(0% 0 0 / 0.3); border: 1px solid var(--line); border-radius: var(--radius-xlarge); justify-self: center; }
.icon-demo__keys * { stroke: var(--ink); fill: none; stroke-width: 0.25; }
.icon-demo__glyph { stroke: var(--brand-hot); stroke-width: var(--sw, 1.5); stroke-linecap: butt; stroke-linejoin: miter; }

.rad-row { display: flex; gap: var(--space-150); flex-wrap: wrap; }
.rad-row i {
  width: 58px; height: 58px;
  display: grid; place-items: center;
  border: 2px solid var(--line-bright);
  border-radius: var(--r);
  font: var(--font-code); font-size: 0.7rem;
  font-style: normal;
  transition: border-color var(--motion-duration-short) linear;
}
.rad-row i:hover { border-color: var(--brand-hot); }

/* �?�?�?�?�?�? OUTRO �?�?�?�?�?�? */
.ch--outro {
  min-height: 100svh;
  display: grid; place-items: center;
  text-align: center;
  max-width: none;
}
.outro__pre { font: var(--font-code); font-size: 0.75rem; letter-spacing: 0.35em; text-transform: uppercase; color: var(--accent); margin-block-end: var(--space-400); }
.outro__title {
  font: 700 clamp(3rem, 1.4rem + 9.5vw, 9rem)/0.94 var(--font-display);
  text-transform: uppercase;
}
.outro__title span { display: block; overflow: hidden; }
.outro__title .char { display: inline-block; transform: translateY(110%); }
.outro__post { margin-block-start: var(--space-400); font-size: 1.15rem; color: var(--ink-dim); }
.outro__post em { color: var(--brand-hot); }
.outro__meta { margin-block: var(--space-500); font-size: 0.78rem; color: var(--ink-faint); max-width: 60ch; margin-inline: auto; text-wrap: pretty; }
.outro__cta { text-decoration: none; display: inline-grid; place-items: center; }

/* reveal base (GSAP toma el control; esto es el estado inicial) */
[data-reveal] { opacity: 0; transform: translateY(40px); }
.no-js [data-reveal], .gsap-off [data-reveal] { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
  .hero__row .char, .outro__title .char { transform: none; }
  .interlude__line { opacity: 1; position: static; }
  .ch--interlude { height: auto; padding: var(--space-800) var(--space-400); display: grid; gap: var(--space-400); }
}