/* ==========================================================================
   Laboratorio de IA · IBERO — el cluster encendido
   Papel claro por defecto; el hero es siempre una vitrina oscura donde vive el
   cluster 3D. Tema oscuro completo con [data-theme="dark"] (conmutador en la nav).
   Los nombres de los tokens son de material: carbón = fondo, esmalte = tinta.
   ========================================================================== */

:root {
  color-scheme: light;
  --carbon: #f5f3ee;         /* papel cálido: fondo */
  --ash: #ebe8e1;            /* superficie elevada */
  --clay: #d8d3ca;           /* líneas y bordes */
  --clay-soft: #b9b2a8;
  --glaze: #141416;          /* tinta principal */
  --gray: #82786f;           /* Warm Gray 9, color oficial secundario */
  --gray-text: #5f574f;      /* Warm Gray 9 oscurecido para texto pequeño sobre papel */
  --ember: #e00034;          /* Rojo IBERO, Pantone 185 C */
  --ember-hot: #ff6a3a;
  --ember-ink: #b8002b;      /* rojo oscurecido para texto pequeño sobre papel */
  --white: #ffffff;
  --err: #b8002b;
  --noise-blend: multiply;
  --noise-opacity: 0.35;

  /* placas de esmalte: siempre claras, en ambos temas */
  --plate-bg: #ffffff;
  --plate-ink: #0b0b0c;
  --plate-ink-soft: #3b3b3f;
  --plate-ink-meta: #5a534d;
  --plate-rule: rgba(59, 59, 63, 0.35);
  --panel-bg: rgba(255, 255, 255, 0.78);

  --font-display: "Instrument Serif", Georgia, serif;
  --font-label: "JetBrains Mono", ui-monospace, monospace;
  --font-body: "Inter Tight", system-ui, sans-serif;
  --ally: #00e5b0;          /* verde Saptiva: datos y estado listo */
  --ally-deep: #00a896;
  --ally-ink: #007a63;      /* verde oscurecido para texto pequeño sobre papel */

  --max: 1240px;
  --pad: clamp(18px, 4vw, 56px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --fast: 180ms;
}

/* tema oscuro completo; en claro solo la vitrina del cluster queda de noche */
[data-theme="dark"], .stage__vitrine {
  color-scheme: dark;
  --carbon: #0b0b0c;
  --ash: #1a1a1c;
  --clay: #3b3b3f;
  --clay-soft: #55555a;
  --glaze: #eaeae8;
  --gray-text: #9a9088;      /* Warm Gray 9 aclarado para texto pequeño sobre carbón */
  --ember-ink: #ff8a9e;      /* rojo aclarado para texto pequeño sobre carbón */
  --err: #ff8a9e;
  --ally-ink: #4ff0c7;      /* verde aclarado para texto pequeño sobre carbón */
  --noise-blend: screen;
  --noise-opacity: 0.55;
  --plate-bg: #eaeae8;
  --panel-bg: rgba(11, 11, 12, 0.72);
  --btn-grain: 0.35;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-color: var(--clay) var(--carbon);
  scrollbar-width: thin;
}

body {
  margin: 0;
  background: var(--carbon);
  color: var(--glaze);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  min-height: 100dvh;
  position: relative;
}

/* grano de hollín sobre todo el papel negro */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.10  0 0 0 0 0.10  0 0 0 0 0.11  0 0 0 0.22 0'/></filter><rect width='240' height='240' filter='url(%23n)'/></svg>");
  mix-blend-mode: var(--noise-blend);
}

body { transition: background var(--fast) var(--ease), color var(--fast) var(--ease); }

::selection { background: var(--ember); color: var(--white); }
:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

.wrap { max-width: var(--max); width: 100%; min-width: 0; margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); position: relative; z-index: 1; }

/* ----------------------------------------------------------- tipografía */
.brush {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--glaze);
}

.brush em { font-style: italic; color: var(--ember); }

.label {
  font-family: var(--font-label);
  font-weight: 500;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.label--glaze { color: var(--glaze); }

/* ---------------------------------------------------------------- brand */
.brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--clay);
}

.brand__id { display: flex; align-items: center; gap: 18px; }
.brand__logo { height: 32px; width: auto; }
.brand__logo--light { display: none; }
[data-theme="dark"] .brand__logo--light { display: block; }
[data-theme="dark"] .brand__logo--ink { display: none; }
.brand__sep { width: 1px; height: 28px; background: var(--clay-soft); }
.brand__name { font-family: var(--font-body); font-weight: 600; font-size: 1.02rem; letter-spacing: 0.02em; color: var(--glaze); }

.brand__nav { display: flex; gap: 6px 26px; flex-wrap: wrap; }
.brand__nav a {
  font-family: var(--font-label);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-text);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--fast) var(--ease);
}
.brand__nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--ally);
  transform: scaleX(0); transform-origin: left; transition: transform var(--fast) var(--ease);
}
.brand__nav a:hover, .brand__nav a:focus-visible, .brand__nav a[aria-current="page"] { color: var(--glaze); }
.brand__nav a:hover::after, .brand__nav a:focus-visible::after, .brand__nav a[aria-current="page"]::after { transform: scaleX(1); }
.brand__nav a[aria-current="page"]::after { background: var(--ember); }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; flex: none;
  padding: 0; margin: -4px 0 0; border: 1px solid var(--clay); border-radius: 3px;
  background: transparent; cursor: pointer;
  color: var(--gray-text); transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.theme-toggle:hover, .theme-toggle:focus-visible { color: var(--glaze); border-color: var(--clay-soft); }
.theme-toggle svg { width: 15px; height: 15px; stroke: currentColor; stroke-width: 1.6; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .sun, [data-theme="dark"] .theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: block; }

/* ------------------------------------------------------------------ hero */
.stage {
  position: relative;
  min-height: 100dvh;
  background: var(--carbon);
  display: grid;
  grid-template-rows: auto 1fr auto;
  isolation: isolate;
}

/* vitrina del cluster: en claro, un panel de noche dentro del papel */
.stage__vitrine {
  position: relative;
  min-height: min(66vh, 560px);
  align-self: stretch;
  background: #0b0b0c;
  border-radius: 10px;
  overflow: hidden;
  isolation: isolate;
}
/* en oscuro el cluster vuelve a ocupar todo el hero, sin marco: para que el lienzo
   se ancle al hero y no a la columna de texto, el contenedor deja de ser posicionado
   y cada bloque de contenido se eleva por su cuenta */
[data-theme="dark"] .stage > .wrap { position: static; z-index: auto; }
[data-theme="dark"] .stage > header.wrap,
[data-theme="dark"] .stage .status { position: relative; z-index: 1; }
[data-theme="dark"] .stage__vitrine {
  position: absolute;
  inset: 0;
  min-height: 0;
  background: none;
  border-radius: 0;
  z-index: 0;
}

#kiln {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* sin WebGL: el cluster se insinúa con luz y grano */
.no-webgl #kiln { display: none; }
.no-webgl .stage__vitrine::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 46% 52% at 54% 52%, rgba(224, 0, 52, 0.45), transparent 70%),
    radial-gradient(ellipse 26% 20% at 54% 84%, rgba(255, 106, 58, 0.5), transparent 70%);
}
[data-theme="dark"] .no-webgl .stage__vitrine::after {
  background:
    radial-gradient(ellipse 34% 42% at 74% 58%, rgba(224, 0, 52, 0.45), transparent 70%),
    radial-gradient(ellipse 20% 16% at 74% 86%, rgba(255, 106, 58, 0.5), transparent 70%);
}

.stage .wrap { z-index: 1; }

.stage__body {
  display: grid;
  grid-template-columns: minmax(300px, 560px) 1fr;
  align-items: stretch;
  gap: clamp(20px, 4vw, 64px);
  padding: clamp(28px, 5vh, 64px) 0 24px;
}

.stage__copy { max-width: 560px; position: relative; z-index: 1; align-self: center; }
[data-theme="dark"] .stage__body { align-items: center; }

.stage__title {
  font-size: clamp(3rem, 6.6vw, 5.6rem);
  margin: 0 0 14px;
}

.rule {
  display: block;
  width: min(380px, 72%);
  height: 10px;
  margin: 6px 0 24px 2px;
}

.stage__lede {
  margin: 0 0 30px;
  font-size: 1.15rem;
  color: var(--gray-text);
  max-width: 38ch;
}

.stage__lede strong { color: var(--glaze); font-weight: 500; }

.cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* botones: cinta de esmalte y ascua, bordes gastados */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  font-family: var(--font-label);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1.5px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  transition: transform var(--fast) var(--ease), background var(--fast) var(--ease), color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.btn::after {
  /* borde gastado, como pintura sobre arcilla */
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: var(--btn-grain, 0.12);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='60'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='2'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.5 0'/></filter><rect width='120' height='60' filter='url(%23g)'/></svg>");
  mix-blend-mode: multiply;
}
.btn svg { width: 18px; height: 18px; stroke: currentColor; stroke-width: 1.75; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

.btn--ember { background: var(--ember); color: var(--white); border-color: #b80029; }
.btn--ember:hover, .btn--ember:focus-visible { background: #c4002d; }

.btn--glaze { background: var(--white); color: var(--glaze); border-color: var(--glaze); }
[data-theme="dark"] .btn--glaze { background: transparent; }
.btn--glaze:hover, .btn--glaze:focus-visible { background: var(--glaze); color: var(--carbon); }

.btn--ghost { background: transparent; color: var(--gray-text); border-color: var(--clay-soft); }
.btn--ghost:hover, .btn--ghost:focus-visible { color: var(--glaze); border-color: var(--glaze); }

/* panel de estado, como el del horno */
.status {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--clay);
  background: var(--panel-bg);
  backdrop-filter: blur(6px);
  margin-bottom: clamp(20px, 4vh, 36px);
}
.status > div { padding: 14px 18px 16px; border-right: 1px solid var(--clay); min-width: 0; }
.status > div:last-child { border-right: 0; }
.status .label { display: block; margin-bottom: 6px; font-size: 0.72rem; }
.status__v { font-family: var(--font-body); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; color: var(--glaze); line-height: 1.3; }
.status__v small { display: block; font-family: var(--font-body); font-weight: 400; font-size: 0.86rem; color: var(--gray-text); letter-spacing: 0; margin-top: 2px; }
.status__bar { height: 2px; background: var(--clay); margin-top: 10px; position: relative; overflow: hidden; }
.status__bar span { position: absolute; left: 0; top: 0; bottom: 0; background: var(--ally); }
.status__live { color: var(--ally-ink); }

/* -------------------------------------------------------------- secciones */
.section { padding: clamp(56px, 9vh, 120px) 0; border-top: 1px solid var(--clay); }
.section__head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 20px 48px; align-items: end; margin-bottom: clamp(28px, 4vh, 48px); }
.section__title { font-size: clamp(2.2rem, 4.6vw, 3.6rem); margin: 0; }
.section__lede { margin: 0; color: var(--gray-text); font-size: 1.08rem; max-width: 52ch; }
.section__lede a { color: var(--glaze); border-bottom: 1px solid var(--clay-soft); }

/* etapas: la fila del proceso de cocción */
.stages { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--clay); margin: 0; padding: 0; list-style: none; }
.stage-item {
  position: relative;
  padding: 22px 20px 26px;
  border-right: 1px solid var(--clay);
  display: flex; flex-direction: column; gap: 8px;
  transition: background var(--fast) var(--ease);
  min-width: 0;
}
.stage-item:last-child { border-right: 0; }
.stage-item:hover, .stage-item:focus-within, .stage-item.is-hot { background: var(--ash); }
.stage-item.is-hot::before, .stage-item:hover::before { content: ""; position: absolute; left: -1px; right: -1px; top: -1px; height: 2px; background: var(--ally); }
.stage-item__n { font-family: var(--font-label); font-weight: 500; font-size: 1.7rem; color: var(--ember); letter-spacing: 0; line-height: 1; }
.stage-item__t { font-family: var(--font-body); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; color: var(--glaze); }
.stage-item__d { margin: 0; color: var(--gray-text); font-size: 0.95rem; }
.stage-item__d a { color: var(--glaze); border-bottom: 1px solid var(--clay-soft); }

/* regiones: recursos como placas de esmalte */
.regions { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.plate {
  position: relative;
  padding: 26px 26px 28px;
  border-radius: 4px;
  display: flex; flex-direction: column; gap: 10px;
  min-width: 0;
  overflow: hidden;
  transition: transform var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.plate:hover { transform: translateY(-2px); }

.plate--glaze { background: var(--plate-bg); color: var(--plate-ink); grid-column: span 6; border: 1px solid var(--clay); }
[data-theme="dark"] .plate--glaze { border-color: transparent; }
.plate--third { grid-column: span 4; }
.plate--glaze::before {
  /* trazas de circuito: textura generada en canvas al cargar (raku.js) */
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.4;
  background-image: var(--crackle, none);
  background-size: 360px 360px;
  mix-blend-mode: multiply;
  mask-image: radial-gradient(ellipse 78% 70% at 42% 52%, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.18) 45%, #000 100%);
  -webkit-mask-image: radial-gradient(ellipse 78% 70% at 42% 52%, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.18) 45%, #000 100%);
}
.plate--glaze .plate__t { color: var(--plate-ink); }
.plate--glaze .plate__d { color: var(--plate-ink-soft); }
.plate--glaze .plate__meta { color: var(--plate-ink-meta); }
.plate--glaze .plate__link { color: var(--plate-ink); border-color: var(--plate-ink); }
.plate--glaze .plate__link:hover, .plate--glaze .plate__link:focus-visible { background: var(--plate-ink); color: var(--plate-bg); }
.plate--glaze .tag--intranet { border-color: var(--plate-ink); color: var(--plate-ink); }
.plate--glaze .tag--reducing { border-color: var(--plate-ink-meta); color: var(--plate-ink-meta); }

.plate--ash { background: var(--ash); border: 1px solid var(--clay); grid-column: span 4; }
.plate--carbon { background: transparent; border: 1px dashed var(--clay-soft); grid-column: span 4; }
.plate--carbon .plate__t { color: var(--gray-text); }
.plate--wide { grid-column: span 12; }
.plate--half { grid-column: span 6; }

.plate__k { display: flex; justify-content: flex-end; align-items: center; gap: 12px; }
.plate__foot { margin-top: auto; padding-top: 10px; }
.plate__t { font-family: var(--font-body); font-weight: 600; font-size: 1.4rem; letter-spacing: -0.015em; color: var(--glaze); line-height: 1.25; margin: 0; }
.plate__d { margin: 0; color: var(--gray-text); }
.plate__meta { font-family: var(--font-label); font-weight: 500; font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray-text); }
.plate__link {
  align-self: flex-start; margin-top: 8px;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px; border: 1.5px solid var(--glaze); border-radius: 3px;
  font-family: var(--font-label); font-weight: 500; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.plate__link:hover, .plate__link:focus-visible { background: var(--glaze); color: var(--carbon); }
.plate__link svg { width: 15px; height: 15px; stroke: currentColor; stroke-width: 1.75; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.plate__url { font-family: var(--font-label); font-size: 0.78rem; letter-spacing: 0; color: var(--gray-text); overflow-wrap: anywhere; }
.plate--glaze .plate__url { color: var(--plate-ink-meta); }

.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 10px; border-radius: 2px;
  font-family: var(--font-label); font-weight: 500; font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase;
}
.tag--ember { background: var(--ember); color: var(--white); }
.tag--ok { background: var(--ally); color: #0b0b0c; }
.tag--intranet { border: 1px solid var(--glaze); color: var(--glaze); }
.tag--reducing { border: 1px solid var(--clay-soft); color: var(--gray-text); }
.tag svg { width: 12px; height: 12px; stroke: currentColor; stroke-width: 1.75; fill: none; }

/* tabla de datos */
.data { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.data th, .data td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--clay); vertical-align: top; }
.data th { font-family: var(--font-label); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--gray-text); }
.data td:first-child { font-family: var(--font-label); font-weight: 500; letter-spacing: 0; white-space: nowrap; color: var(--glaze); }
.list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.list li { padding: 10px 0 10px 18px; border-bottom: 1px solid var(--clay); position: relative; color: var(--glaze); }
.list li::before { content: ""; position: absolute; left: 0; top: 19px; width: 8px; height: 8px; border-radius: 50%; background: var(--ally); }
.list li:last-child { border-bottom: 0; }
.data tr.is-hot td { color: var(--ally-ink); }
.data tr.is-hot td:first-child { color: var(--ally-ink); }
.plate--glaze .data th { color: var(--plate-ink-meta); }
.plate--glaze .data td { border-color: var(--plate-rule); }
.plate--glaze .data td:first-child { color: var(--plate-ink); }
.plate--glaze .list li { color: var(--plate-ink); border-color: var(--plate-rule); }
.plate--glaze .data tr.is-hot td { color: var(--ally-deep); }

/* --------------------------------------------------------------- footer */
.foot { border-top: 1px solid var(--clay); padding: 36px 0 44px; }
.foot__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr auto; gap: 24px 40px; align-items: start; }
.foot .label { display: block; margin-bottom: 8px; }
.foot__v { font-family: var(--font-body); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; color: var(--glaze); }
.foot__v small { display: block; font-family: var(--font-body); font-weight: 400; color: var(--gray-text); font-size: 0.9rem; letter-spacing: 0; }
.foot__links { display: flex; flex-wrap: wrap; gap: 8px 22px; font-family: var(--font-label); font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--gray-text); }
.foot__links a:hover, .foot__links a:focus-visible { color: var(--glaze); }
.foot__ally { display: flex; align-items: center; gap: 12px; }
.foot__ally img { height: 20px; width: auto; }

/* ------------------------------------------------------------ formularios */
.form-page { min-height: 100dvh; display: grid; grid-template-rows: auto 1fr auto; position: relative; z-index: 1; }
.form-layout { display: grid; grid-template-columns: minmax(260px, 340px) 1fr; gap: clamp(28px, 4vw, 72px); padding: clamp(36px, 6vh, 72px) 0 clamp(40px, 6vh, 80px); align-items: start; }
.form-aside { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 18px; }
.form-aside h1 { font-size: clamp(2.6rem, 4.6vw, 4rem); margin: 0; }
.form-aside p { margin: 0; color: var(--gray-text); }
.steps { list-style: none; margin: 8px 0 0; padding: 0; border-top: 1px solid var(--clay); }
.steps li { border-bottom: 1px solid var(--clay); }
.steps li[hidden] { display: none; }
.steps a { display: grid; grid-template-columns: 40px 1fr; gap: 12px; padding: 11px 6px; align-items: baseline; font-family: var(--font-body); letter-spacing: 0; color: var(--gray-text); transition: color var(--fast) var(--ease), background var(--fast) var(--ease); }
.steps a:hover, .steps a:focus-visible, .steps li.is-active a { color: var(--glaze); background: var(--ash); }
.steps .n { font-weight: 500; color: var(--ally-ink); }

.form { display: flex; flex-direction: column; gap: 22px; }
.form[hidden] { display: none; }
fieldset { border: 1px solid var(--clay); background: var(--ash); padding: 22px 24px 26px; margin: 0; min-width: 0; border-radius: 4px; scroll-margin-top: 24px; }
fieldset[hidden] { display: none; }
legend { font-family: var(--font-body); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em; color: var(--glaze); padding: 0 10px; margin-left: -10px; }
legend .n { font-family: var(--font-label); font-weight: 500; color: var(--ally-ink); margin-right: 10px; }
.help { margin: -4px 0 16px; color: var(--gray-text); font-size: 0.95rem; max-width: 62ch; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 20px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field--full { grid-column: 1 / -1; }
.field label, .field .lbl { font-size: 0.92rem; color: var(--glaze); font-weight: 500; line-height: 1.3; }
.field label .req { color: var(--ember-ink); margin-left: 4px; }
.field .hint { color: var(--gray-text); font-size: 0.86rem; margin: 0; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--carbon); border: 1px solid var(--clay-soft); border-radius: 3px;
  padding: 11px 12px; caret-color: var(--ember);
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.field textarea { min-height: 5.5em; resize: vertical; line-height: 1.45; }
.field input::placeholder, .field textarea::placeholder { color: var(--gray-text); opacity: 0.8; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--ally); box-shadow: 0 0 0 3px rgba(0, 229, 176, 0.2); }
.field input:user-invalid, .field select:user-invalid, .field textarea:user-invalid { border-color: var(--err); }
.field .error { color: var(--err); font-size: 0.86rem; margin: 0; display: none; }
.field input:user-invalid ~ .error, .field select:user-invalid ~ .error, .field textarea:user-invalid ~ .error { display: block; }
.field select { appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23141416' stroke-width='1.5'><path d='M3 6l5 5 5-5'/></svg>"); background-repeat: no-repeat; background-position: right 12px center; background-size: 14px; padding-right: 34px; }

[data-theme="dark"] .field select { background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23eaeae8' stroke-width='1.5'><path d='M3 6l5 5 5-5'/></svg>"); }

.choices { display: flex; flex-wrap: wrap; gap: 10px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; inset: 0; cursor: pointer; margin: 0; }
.choice span {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 14px;
  border: 1px solid var(--clay-soft); border-radius: 3px; background: var(--carbon);
  font-family: var(--font-body); font-weight: 500; font-size: 0.98rem; letter-spacing: 0; line-height: 1.3; color: var(--glaze);
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.choice span::before { content: ""; width: 12px; height: 12px; border: 1.5px solid currentColor; display: inline-block; flex: none; }
.choice input[type="radio"] + span::before { border-radius: 50%; }
.choice input:checked + span { background: var(--glaze); color: var(--carbon); border-color: var(--glaze); }
.choice input:checked + span::before { background: var(--ally); border-color: var(--ally); }
.choice input:focus-visible + span { outline: 2px solid var(--ember); outline-offset: 3px; }
.choices--big .choice span { padding: 16px 22px; font-size: 1.08rem; }

.software-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 12px 16px; padding: 14px 0; border-bottom: 1px solid var(--clay); }
.software-row:last-child { border-bottom: 0; }
.software-row > .lbl { grid-column: 1 / -1; font-family: var(--font-body); font-weight: 600; font-size: 1rem; letter-spacing: 0; color: var(--glaze); }

.form-actions { display: grid; grid-template-columns: 1fr auto; gap: 16px 28px; align-items: center; padding-top: 18px; border-top: 1px solid var(--clay); }
.form-actions p { margin: 0; color: var(--gray-text); font-size: 0.92rem; max-width: 56ch; }

/* sello del horno */
.stamp { border: 2px solid var(--ally); color: var(--ally-ink); padding: 22px 26px; display: grid; grid-template-columns: auto 1fr; gap: 8px 20px; align-items: center; transform: rotate(-1.4deg); background: var(--ash); border-radius: 4px; outline: none; }
.stamp[hidden] { display: none; }
.stamp .brush { font-size: 2rem; color: var(--ally-ink); }
.stamp .label { color: var(--ally-ink); }
.stamp p { margin: 0; color: var(--glaze); grid-column: 2; }
.stamp--err { border-color: var(--err); color: var(--err); transform: none; }
.stamp--err .brush, .stamp--err .label { color: var(--err); }

/* --------------------------------------------------------------- motion */

/* ----------------------------------------------------------- responsive */
@media (max-width: 1080px) {
  .regions { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .plate--glaze { grid-column: span 6; }
  .plate--third { grid-column: span 3; }
  .plate--third:last-child { grid-column: span 6; }
  .plate--ash, .plate--carbon { grid-column: span 3; }
  .plate--wide, .plate--half { grid-column: span 6; }
  .stages { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stage-item { border-right: 0; border-bottom: 1px solid var(--clay); }
  .stage-item:nth-child(odd) { border-right: 1px solid var(--clay); }
  .stage-item:last-child { grid-column: 1 / -1; border-bottom: 0; }
  .status { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .status > div:nth-child(2n) { border-right: 0; }
  .status > div:nth-child(n + 3) { border-top: 1px solid var(--clay); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .software-row { grid-template-columns: 1fr 1fr; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .brand { flex-direction: column; align-items: flex-start; gap: 12px; }
  .brand__nav { flex-wrap: nowrap; overflow-x: auto; width: 100%; min-width: 0; max-width: 100%; padding-bottom: 6px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .brand { width: 100%; min-width: 0; }
  .brand__nav::-webkit-scrollbar { display: none; }
  .brand__nav a { white-space: nowrap; flex: none; }
  .brand__nav { mask-image: linear-gradient(to right, #000 0%, #000 82%, transparent 100%); -webkit-mask-image: linear-gradient(to right, #000 0%, #000 82%, transparent 100%); padding-right: 40px; }
  .brand__nav .nav--cta { display: none; }
  .brand { position: relative; }
  .theme-toggle { position: absolute; top: 16px; right: 0; margin: 0; }
  .brand__nav { padding-right: 46px; }
  .stage__body { grid-template-columns: 1fr; gap: 26px; }
  .stage__vitrine { order: -1; min-height: min(44vh, 360px); }
  [data-theme="dark"] .stage__body { padding-top: min(32vh, 270px); }
  [data-theme="dark"] .stage__vitrine { order: 0; }
  [data-theme="dark"] .stage__copy {
    padding: 22px 0 0;
    background: linear-gradient(180deg, rgba(11, 11, 12, 0) 0%, rgba(11, 11, 12, 0.94) 14%, rgba(11, 11, 12, 0.94) 100%);
  }
  .stage__title { font-size: clamp(2.5rem, 11vw, 3.4rem); margin-bottom: 10px; }
  .stage__lede { font-size: 1.05rem; margin-bottom: 20px; }
  .cta { gap: 10px; }
  .btn { padding: 14px 20px; }
  .section__head { grid-template-columns: 1fr; }
  .regions { grid-template-columns: 1fr; }
  .plate--glaze, .plate--ash, .plate--carbon, .plate--wide, .plate--half, .plate--third, .plate--third:last-child { grid-column: auto; }
  .stages { grid-template-columns: 1fr; }
  .stage-item { border-right: 0 !important; }
  .stage-item:last-child { grid-column: auto; }
  .form-layout { grid-template-columns: 1fr; }
  .form-aside { position: static; }
  .grid, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .software-row { grid-template-columns: 1fr; }
  .form-actions { grid-template-columns: 1fr; }
  .btn { justify-content: center; }
  .foot__grid { grid-template-columns: 1fr; }
  .data, .data tbody, .data tr, .data td { display: block; }
  .data thead { display: none; }
  .data tr { padding: 10px 0; border-bottom: 1px solid var(--clay); }
  .data td { border: 0; padding: 1px 0; white-space: normal; }
  .data td:first-child { padding-bottom: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; }
}