/* ==========================================================================
   Tareas de aprendizaje resilientes — 7.º SIPEMAT
   Sistema visual: papel cuadriculado académico + espiral áurea (identidad
   del simposio: proporción áurea, sol, jangada y bandera de Alagoas).
   Lienzo fijo 1920 × 1080, escalado al tamaño de la pantalla.
   ========================================================================== */

:root {
  --paper: #FBFAF6;
  --paper-2: #F3F1EA;
  --ink: #0C1626;
  --ink-2: #13233A;
  --navy: #163B63;
  --navy-2: #1F4E79;
  --text: #1C2633;
  --muted: #5D6A7A;
  --line: rgba(22, 59, 99, .14);
  --teal: #12877A;
  --red: #EE4136;
  --cyan: #2FB8EA;
  --orange: #FF7A1A;
  --gold: #F2B630;
  --violet: #6B5BA8;
  --cream-hi: #FFF6E3;

  --serif: 'Fraunces', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --sans: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
  --math: 'STIX Two Text', 'Cambria Math', 'Times New Roman', serif;
  --mono: 'JetBrains Mono', Consolas, monospace;

  --ease: cubic-bezier(.2, .7, .15, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: #05080E;
  color: var(--text);
  font-family: var(--sans);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.hide-cursor, body.hide-cursor * { cursor: none !important; }
img { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* ---------- Lienzo ---------- */
#viewport { position: fixed; inset: 0; overflow: hidden; }
#stage {
  position: absolute; left: 50%; top: 50%;
  width: 1920px; height: 1080px;
  transform-origin: 0 0;
  overflow: hidden;
  background: var(--paper);
  box-shadow: 0 30px 120px rgba(0,0,0,.55);
}

/* ---------- Diapositivas ---------- */
.slide {
  position: absolute; inset: 0;
  width: 1920px; height: 1080px;
  overflow: hidden;
  opacity: 0; visibility: hidden;
  transform: translateX(60px) scale(.985);
  transition: opacity .75s var(--ease), transform .9s var(--ease), visibility 0s linear .9s;
  will-change: opacity, transform;
}
.slide.past { transform: translateX(-60px) scale(.985); }
.slide.active {
  opacity: 1; visibility: visible; transform: none;
  transition: opacity .75s var(--ease), transform .9s var(--ease), visibility 0s;
  z-index: 2;
}

/* Fondo claro: papel milimetrado */
.slide.light {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(22,59,99,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,59,99,.045) 1px, transparent 1px),
    linear-gradient(rgba(22,59,99,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,59,99,.02) 1px, transparent 1px);
  background-size: 240px 240px, 240px 240px, 48px 48px, 48px 48px;
  background-position: -1px -1px;
}
.slide.light::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 80% 70% at 40% 45%, rgba(251,250,246,0) 0%, rgba(251,250,246,.75) 100%);
}

/* Fondo oscuro: tinta con resplandores del simposio */
.slide.dark {
  background:
    radial-gradient(900px 600px at 88% 8%, rgba(238,65,54,.20), transparent 60%),
    radial-gradient(800px 700px at 4% 100%, rgba(47,184,234,.18), transparent 60%),
    radial-gradient(700px 500px at 60% 120%, rgba(255,122,26,.14), transparent 60%),
    linear-gradient(160deg, #0E1B2E 0%, #0A1322 55%, #070D18 100%);
  color: #F2EFE7;
}
.slide.dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 50%, #000 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 50%, #000 30%, transparent 85%);
}
.slide.bleed { background: #0A1322; }

/* Riel lateral del simposio */
.rail {
  position: absolute; top: 0; right: 0; bottom: 0; width: 92px;
  display: grid; grid-template-rows: repeat(3, 1fr); z-index: 5;
}
.rail i { display: grid; place-items: center; }
.rail i img { width: 54px; opacity: .97; }
.rail .r { background: var(--red); }
.rail .c { background: var(--cyan); }
.rail .o { background: var(--orange); }
.rail .o img { width: 50px; }

/* Zona de contenido */
.wrap { position: absolute; left: 112px; right: 196px; top: 78px; bottom: 100px; z-index: 3; }
.dark .wrap, .bleed .wrap { right: 112px; }

/* Encabezados */
.eyebrow {
  display: flex; align-items: center; gap: 16px;
  font: 700 19px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase;
  color: var(--teal);
}
.eyebrow .num {
  font: 600 italic 22px/1 var(--serif); letter-spacing: 0; text-transform: none;
  color: var(--red);
}
.eyebrow .sep { width: 34px; height: 1.5px; background: currentColor; opacity: .5; }
.dark .eyebrow { color: #7FD6F2; }

h1, h2, h3 { font-family: var(--serif); font-weight: 560; color: var(--navy); letter-spacing: -.012em; }
.title {
  margin-top: 22px;
  font-size: 66px; line-height: 1.04;
  font-variation-settings: "opsz" 144;
}
.title em { font-style: italic; color: var(--teal); font-weight: 480; }
.dark h1, .dark h2, .dark h3 { color: #FFFDF8; }

p { font-size: 27px; line-height: 1.5; }
.lead { font-size: 30px; line-height: 1.45; color: var(--text); }
.muted { color: var(--muted); }
.hl { color: var(--red); font-weight: 700; }
.hl-o { color: var(--orange); font-weight: 700; }
.hl-t { color: var(--teal); font-weight: 700; }
.math { font-family: var(--math); font-style: italic; }
.math .up { font-style: normal; }
.nowrap { white-space: nowrap; }

/* Pie de página académico */
.foot {
  position: absolute; left: 112px; right: 196px; bottom: 34px; z-index: 4;
  display: flex; justify-content: space-between; align-items: baseline; gap: 40px;
  font: 500 17px/1.3 var(--sans); color: var(--muted);
}
.dark .foot, .bleed .foot { right: 112px; color: rgba(242,239,231,.62); }
.bleed .foot { text-shadow: 0 1px 8px rgba(0,0,0,.7); color: rgba(255,255,255,.85); }
.foot .cite { font-style: italic; }
.foot .pg { font-family: var(--mono); font-size: 16px; letter-spacing: .06em; white-space: nowrap; }
.foot .pg b { color: var(--navy); font-weight: 600; }
.dark .foot .pg b, .bleed .foot .pg b { color: #fff; }
.foot .sec { margin-right: 18px; font-family: var(--sans); letter-spacing: .14em; text-transform: uppercase; font-size: 14px; }

/* Barra de progreso */
#progress {
  position: absolute; left: 0; bottom: 0; height: 5px; width: 0; z-index: 50;
  background: linear-gradient(90deg, var(--red), var(--orange) 50%, var(--cyan));
  transition: width .8s var(--ease);
}

/* ---------- Animaciones de entrada ---------- */
.rise { opacity: 0; }
.slide.active .rise { animation: rise 1s var(--ease) both; animation-delay: calc(var(--d, 0) * 110ms + 180ms); }
@keyframes rise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }
.slide.active .pop { animation: pop .9s var(--ease) both; animation-delay: calc(var(--d, 0) * 110ms + 180ms); }
/* Ítems de lista que aparecen solos, uno tras otro (--i = orden) */
:root { --seq-step: 600ms; --seq-start: 650ms; }
.seq { opacity: 0; }
.slide.active .seq { animation: rise .8s var(--ease) both; animation-delay: calc(var(--i, 0) * var(--seq-step) + var(--seq-start)); }
.f .seq { --seq-start: 250ms; }               /* dentro de un fragmento: arranca cuando este aparece */
.slide.active .f:not(.on) .seq { animation: none; }
@keyframes seq-fade { from { opacity: 0; filter: blur(4px); } to { opacity: 1; filter: none; } }
@keyframes pop { from { opacity: 0; transform: scale(.92); } to { opacity: 1; transform: none; } }

/* Fragmentos (revelado progresivo) */
.f { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .7s var(--ease), filter .6s; }
.f.on { opacity: 1; transform: none; }
.f.blur { filter: blur(8px); }
.f.blur.on { filter: none; }

/* Ken Burns para fotografías */
.kb { transform-origin: 50% 50%; }
.slide.active .kb { animation: kb 24s ease-out both; }
@keyframes kb { from { transform: scale(1.0); } to { transform: scale(1.07) translate(-.6%, -.4%); } }

/* Espiral áurea */
svg.phi .sq { fill: none; stroke: currentColor; stroke-width: 1.2; opacity: .55; vector-effect: non-scaling-stroke; }
svg.phi .sp { fill: none; stroke: currentColor; stroke-width: 2.6; stroke-linecap: round; }
.slide.active svg.phi.draw .sp { animation: drawsp 3.6s var(--ease) both .3s; }
.slide.active svg.phi.draw .sq { animation: fadesq 2.4s ease both .2s; }
@keyframes drawsp { from { stroke-dashoffset: var(--len); } to { stroke-dashoffset: 0; } }
@keyframes fadesq { from { opacity: 0; } }

/* Tarjetas y elementos genéricos */
.card {
  background: #fff; border-radius: 22px;
  box-shadow: 0 1px 0 rgba(22,59,99,.06), 0 18px 50px -18px rgba(22,59,99,.28);
  border: 1px solid rgba(22,59,99,.08);
}
.frame { border-radius: 22px; overflow: hidden; box-shadow: 0 24px 60px -20px rgba(12,22,38,.45); background: #fff; }
.frame img { width: 100%; height: 100%; object-fit: cover; }
.chip {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 20px; border-radius: 999px;
  font: 600 22px/1.1 var(--sans);
  background: #fff; border: 1.5px solid rgba(255,122,26,.45); color: #9C4206;
}
.cap { font: 500 18px/1.35 var(--sans); color: var(--muted); margin-top: 12px; }
.cap b { font-family: var(--serif); font-style: italic; color: var(--navy); font-weight: 600; margin-right: 6px; }

/* Ampliación de imágenes (lupa) */
.zoomable { cursor: zoom-in; position: relative; }
.lens {
  position: absolute; width: 420px; height: 420px; border-radius: 50%;
  pointer-events: none; z-index: 30; display: none;
  border: 5px solid #fff;
  box-shadow: 0 20px 60px rgba(0,0,0,.45), inset 0 0 0 1px rgba(0,0,0,.1);
  background-repeat: no-repeat; background-color: #fff;
}
.zoomable.lensing { cursor: none; }
.zoomable.lensing .lens { display: block; }
.zoom-hint {
  position: absolute; right: 18px; bottom: 18px; z-index: 6;
  font: 600 15px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase;
  background: rgba(12,22,38,.78); color: #fff; padding: 10px 14px; border-radius: 999px;
  opacity: .0; transition: opacity .3s;
}
.zoomable:hover .zoom-hint { opacity: 1; }

/* ======================================================================
   Diapositivas específicas
   ====================================================================== */

/* 1 — Portada */
.cover .bg-phi { position: absolute; right: 30px; top: 60px; width: 1150px; color: rgba(31,78,121,.16); z-index: 1; }
.cover .top { position: absolute; left: 112px; right: 196px; top: 64px; display: flex; justify-content: space-between; align-items: flex-start; z-index: 3; }
.cover .top img { height: 168px; width: auto; }
.cover .theme { max-width: 780px; padding-left: 26px; position: relative; margin-top: 8px; }
.cover .theme::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 8px; border-radius: 4px; background: var(--red); }
.cover .theme small { display: block; font: 700 15px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.cover .theme p { font: 400 38px/1.18 var(--sans); color: var(--ink-2); letter-spacing: -.005em; }
.cover .main { position: absolute; left: 112px; right: 196px; top: 318px; z-index: 3; }
.cover .kicker { font: 700 19px/1 var(--sans); letter-spacing: .22em; text-transform: uppercase; color: var(--red); display: flex; gap: 16px; align-items: center; }
.cover .kicker i { width: 46px; height: 2px; background: var(--red); display: inline-block; }
.cover h1 { margin-top: 26px; font-size: 76px; line-height: 1.02; font-weight: 600; font-variation-settings: "opsz" 144; color: var(--navy); max-width: 1500px; }
.cover h1 em { font-style: italic; font-weight: 450; color: var(--teal); }
.cover .sub { margin-top: 28px; font: 400 italic 38px/1.25 var(--serif); color: var(--teal); }
.cover .author { position: absolute; left: 112px; top: 742px; display: flex; align-items: center; gap: 28px; z-index: 3; }
.cover .author img { height: 112px; width: auto; }
.cover .author .who { padding: 0 8px; }
.cover .author .name { font: 600 46px/1.05 var(--serif); color: var(--ink); letter-spacing: -.01em; }
.cover .author .aff { font: 500 25px/1.4 var(--sans); color: var(--muted); margin-top: 8px; }
.cover .sponsors {
  position: absolute; left: 112px; right: 196px; bottom: 44px; z-index: 3;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 16px 30px; border-radius: 18px; background: #fff;
  box-shadow: 0 10px 40px -20px rgba(22,59,99,.4); border: 1px solid rgba(22,59,99,.08);
}
.cover .sponsors img { height: 58px; width: auto; object-fit: contain; mix-blend-mode: multiply; }
.cover .sponsors img.sq { height: 70px; }
.cover .sponsors .lbl { font: 700 13px/1.2 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); writing-mode: vertical-rl; transform: rotate(180deg); }

/* Figura geométrica (problema) */
.eq { font-family: var(--math); font-style: italic; font-size: 70px; color: var(--ink); text-align: center; letter-spacing: .01em; }
.eq .o { font-style: normal; margin: 0 .32em; color: var(--red); }
svg.fig { width: 100%; height: auto; overflow: visible; }
svg.fig .reg-a { fill: rgba(238,65,54,.07); }
svg.fig .reg-b { fill: rgba(47,184,234,.16); }
svg.fig .reg-c { fill: rgba(255,122,26,.08); }
svg.fig .edge { fill: none; stroke: var(--navy-2); stroke-width: 3.5; stroke-linejoin: round; }
svg.fig .inner { stroke: var(--navy-2); stroke-width: 2.4; }
svg.fig .dim { stroke: var(--cyan); stroke-width: 4; stroke-linecap: round; }
svg.fig .tick { stroke: var(--cyan); stroke-width: 3; }
svg.fig .dimt { font: 700 32px var(--sans); fill: #0E8FC2; text-anchor: middle; }
svg.fig .pt { font: italic 36px var(--math); fill: var(--navy); text-anchor: middle; }
svg.fig .seg { font: italic 26px var(--math); fill: var(--muted); text-anchor: middle; }
svg.fig .hx { stroke: var(--red); stroke-width: 4; }
svg.fig .hxt { font: italic 600 32px var(--math); fill: var(--red); text-anchor: end; }
.figbox { padding: 34px 44px 26px; }

/* 3, 7, 9 — imagen a sangre */
.bleed .full { position: absolute; inset: 0; }
.bleed .full img { width: 100%; height: 100%; object-fit: cover; }
.bleed .shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(5,10,20,0) 70%, rgba(5,10,20,.55) 100%); z-index: 2; pointer-events: none; }
.bleed .tag {
  position: absolute; left: 112px; top: 64px; z-index: 4;
  font: 700 17px/1 var(--sans); letter-spacing: .22em; text-transform: uppercase; color: #fff;
  background: rgba(12,22,38,.55); backdrop-filter: blur(6px); padding: 12px 18px; border-radius: 999px;
}

/* Divisores de sección */
.divider .big-num {
  position: absolute; left: 96px; top: 60px;
  font: 300 italic 400px/0.8 var(--serif); font-variation-settings: "opsz" 144;
  color: transparent; -webkit-text-stroke: 2px rgba(255,255,255,.22);
  z-index: 2;
}
.divider .phi { position: absolute; right: -40px; bottom: -60px; width: 1100px; color: rgba(127,214,242,.30); z-index: 1; }
.divider .content { position: absolute; left: 112px; right: 640px; top: 560px; z-index: 3; }
.divider h2 { font-size: 94px; line-height: 1.0; font-weight: 520; font-variation-settings: "opsz" 144; }
.divider h2 em { font-style: italic; color: #FFC46B; font-weight: 400; }
.divider .desc { margin-top: 30px; font: 400 30px/1.45 var(--sans); color: rgba(242,239,231,.78); max-width: 1000px; }
.divider .tri { position: absolute; left: 112px; top: 470px; display: flex; gap: 10px; z-index: 3; }
.divider .tri i { width: 54px; height: 10px; border-radius: 6px; }

/* 5 — Colombia */
.co .grid { display: grid; grid-template-columns: 500px 1fr; gap: 56px; margin-top: 30px; }
.co ol.nums li { font-size: 22.5px; line-height: 1.42; margin-bottom: 10px; padding-left: 54px; }
.co ol.nums li::before { width: 34px; height: 34px; font-size: 20px; }
.co .group + .group { margin-top: 22px; }
.co .visuals .cube .frame { width: 230px !important; height: 270px !important; }
.co .visuals .cube { height: 270px !important; }
.co .visuals { display: flex; flex-direction: column; gap: 22px; }
.co .visuals .cube { height: 300px; display: flex; gap: 22px; }
.co .visuals .cube .frame { flex: 0 0 auto; width: 262px; height: 300px; }
.co .visuals .cube .frame img { object-fit: contain; background: #fff; padding: 6px; }
.co .visuals .cube .note { font: 500 22px/1.45 var(--sans); color: var(--muted); align-self: center; }
.co .visuals .cube .note b { color: var(--navy); font-weight: 700; display: block; font-family: var(--serif); font-size: 28px; margin-bottom: 6px; }
.co .visuals .cover-img { height: 186px; }
.co .visuals .cover-img img { object-fit: cover; object-position: 60% 50%; }
.co h3, .br h3 { font: 700 18px/1 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--orange); margin-bottom: 16px; display: flex; gap: 12px; align-items: center; }
.co h3 small, .br h3 small { font-weight: 500; letter-spacing: .04em; text-transform: none; color: var(--muted); font-size: 18px; }
ol.nums { list-style: none; counter-reset: n; }
ol.nums li { counter-increment: n; position: relative; padding-left: 58px; font-size: 25px; line-height: 1.45; margin-bottom: 14px; color: var(--text); }
ol.nums li::before {
  content: counter(n); position: absolute; left: 0; top: 2px;
  width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  font: 600 italic 22px/1 var(--serif); color: #fff; background: var(--navy-2);
}
ol.nums.o li::before { background: var(--teal); }
ol.nums li b { color: var(--navy); }

/* 6 — Brasil */
.br .head { display: flex; justify-content: space-between; align-items: flex-start; }
.br .head img { height: 210px; width: auto; margin-top: -8px; mix-blend-mode: multiply; }
.br .quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; margin-top: 8px; }
.br blockquote {
  position: relative; padding: 26px 30px 24px 34px; border-radius: 20px;
  background: linear-gradient(180deg, #fff, #FAFCFF);
  border: 1px solid rgba(18,135,122,.18);
  font: 400 italic 24.5px/1.45 var(--serif); color: var(--ink-2);
}
.br blockquote::before {
  content: "“"; position: absolute; left: 18px; top: -44px;
  font: 600 120px/1 var(--serif); color: var(--teal); opacity: .9;
}
.br blockquote cite { display: block; margin-top: 12px; font: 600 normal 17px/1.3 var(--sans); color: var(--teal); letter-spacing: .02em; }
.br .comp { margin-top: 30px; }
.br .comp ul { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px 22px; }
.br .comp li {
  position: relative; padding: 18px 20px 18px 66px; border-radius: 16px; background: rgba(255,255,255,.85);
  border: 1px solid var(--line); font-size: 19.5px; line-height: 1.38; color: var(--text);
}
.br .comp li span {
  position: absolute; left: 18px; top: 18px; width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; background: var(--teal); color: #fff; font: 600 italic 20px/1 var(--serif);
}

/* 7 — Comparativo */
.cmp .wrap { right: 112px; }
.cmp .side { position: absolute; left: 112px; top: 78px; width: 250px; z-index: 3; }
.cmp .side h2 { font-size: 46px; line-height: 1.06; margin-top: 18px; }
.cmp .side p { font-size: 21px; line-height: 1.5; color: var(--muted); margin-top: 22px; }
.cmp .side .hint { margin-top: 28px; font: 600 16px/1.4 var(--sans); letter-spacing: .06em; text-transform: uppercase; color: var(--teal); display: flex; gap: 10px; align-items: center; }
.cmp .pic { position: absolute; left: 400px; top: 40px; width: 1400px; height: 933px; z-index: 3; }
.cmp .pic img { width: 100%; height: 100%; object-fit: contain; border-radius: 18px; box-shadow: 0 30px 80px -24px rgba(12,22,38,.5); }

/* 8 — Mapas */
.maps .q1 { position: absolute; left: 112px; top: 92px; width: 720px; z-index: 4; }
.maps .q2 { position: absolute; left: 860px; top: 690px; width: 860px; z-index: 4; }
.maps .q { font: 400 italic 33px/1.38 var(--serif); color: var(--ink-2); }
.maps .q b { font-style: normal; font-weight: 600; color: var(--navy); }
.maps .q .k { color: var(--teal); font-weight: 600; }
.maps .m1 { position: absolute; left: 40px; top: 360px; width: 870px; z-index: 2; }
.maps .m2 { position: absolute; left: 850px; top: 60px; width: 900px; z-index: 2; }
.maps .m1 img, .maps .m2 img { mix-blend-mode: multiply; }

/* 10 — Diana */
.target .scene { position: absolute; inset: 0; z-index: 3; }
.target .dia { position: absolute; left: 560px; top: 150px; width: 760px; height: 760px; }
.target .dia > img { width: 100%; height: 100%; }
.target .core { position: absolute; left: 50%; top: 50%; width: 230px; height: 230px; transform: translate(-50%, -50%); border-radius: 50%; overflow: hidden; background: #fff; box-shadow: inset 0 0 0 6px rgba(255,255,255,.7); }
.target .core img { width: 100%; height: 100%; object-fit: cover; }
.target .arrow { position: absolute; left: 50%; top: 50%; width: 520px; height: 300px; transform-origin: 0 100%; transform: translate(-6px, -300px); z-index: 4; pointer-events: none; }
.target.active .arrow { animation: fly 1.1s cubic-bezier(.3,.9,.3,1) both 1.1s; }
@keyframes fly {
  0% { opacity: 0; transform: translate(-6px, -300px) translate(420px, -180px); }
  60% { opacity: 1; transform: translate(-6px, -300px); }
  72% { transform: translate(-6px, -300px) rotate(-1.2deg); }
  84% { transform: translate(-6px, -300px) rotate(.8deg); }
  100% { opacity: 1; transform: translate(-6px, -300px); }
}
.target .who { position: absolute; width: 330px; text-align: center; }
.target .who .ph { width: 330px; height: 330px; border-radius: 50%; overflow: hidden; background: #fff; box-shadow: 0 20px 60px -20px rgba(12,22,38,.4); border: 8px solid #fff; }
.target .who .ph img { width: 100%; height: 100%; object-fit: cover; }
.target .who p { font: 600 22px/1.3 var(--sans); color: var(--muted); margin-top: 18px; letter-spacing: .12em; text-transform: uppercase; }
.target .t1 { left: 140px; top: 330px; }
.target .t2 { left: 1410px; top: 380px; }
.target .qm { position: absolute; left: 400px; top: 210px; font: 700 210px/1 var(--serif); color: var(--red); z-index: 5; }
.target.active .qm { animation: wob 3.2s ease-in-out infinite 1.6s; }
@keyframes wob { 0%,100% { transform: rotate(0); } 50% { transform: rotate(9deg) translateY(-6px); } }
.target .ask { position: absolute; left: 112px; top: 78px; z-index: 6; }

/* 11 — Tres imágenes + flujo */
.trio .row { display: flex; gap: 28px; align-items: flex-start; margin-top: 36px; }
.trio .row figure { flex: 0 0 auto; }
.trio .row .frame { height: 350px; }
.trio .row .frame img { object-fit: contain; background: #fff; }
.trio .flow { display: flex; align-items: center; gap: 22px; margin-top: 58px; }
.trio .step {
  flex: 1; height: 168px; border-radius: 26px; display: grid; place-items: center; text-align: center;
  font: 600 40px/1.1 var(--serif); color: #fff; padding: 0 30px;
  box-shadow: 0 24px 50px -22px rgba(12,22,38,.55);
}
.trio .step small { display: block; font: 700 15px/1 var(--sans); letter-spacing: .22em; text-transform: uppercase; opacity: .8; margin-bottom: 12px; }
.trio .s1 { background: linear-gradient(140deg, #7A5FB0, #5B4A93); }
.trio .s2 { background: linear-gradient(140deg, #2B5C9B, #1C3F70); }
.trio .s3 { background: linear-gradient(140deg, #17A2B8, #0F7F8E); }
.trio .arr { flex: 0 0 70px; color: var(--orange); }

/* 13 — Tecnología e IA (oscura) */
.tech .quote { position: absolute; left: 112px; top: 120px; width: 900px; z-index: 3; }
.tech .quote p { font: 400 italic 46px/1.28 var(--serif); color: #FFFDF8; font-variation-settings: "opsz" 144; }
.tech .quote p b { font-style: normal; font-weight: 600; color: #FFC46B; }
.tech .im1 { position: absolute; left: 112px; top: 560px; width: 640px; height: 400px; z-index: 3; }
.tech .im2 { position: absolute; right: 112px; top: 96px; width: 760px; height: 470px; z-index: 3; }
.tech .ask { position: absolute; left: 820px; right: 112px; top: 610px; z-index: 3; }
.tech .ask p { font: 500 36px/1.35 var(--sans); color: #CDEFFC; }
.tech .ask p::before { content: "?"; float: left; font: 700 italic 120px/0.9 var(--serif); color: var(--orange); margin: 4px 22px 0 0; }
.tech .claim {
  position: absolute; left: 820px; right: 112px; top: 846px; z-index: 3;
  padding: 26px 34px; border-radius: 20px; background: rgba(255,246,227,.08); border: 1px solid rgba(255,196,107,.4);
  font: 500 29px/1.4 var(--sans); color: #FFF1D6;
}
.tech .claim b { color: #FF9A50; }
.tech .frame { box-shadow: 0 30px 90px -20px rgba(0,0,0,.7); border: 1px solid rgba(255,255,255,.12); }

/* 14 — ¿Qué tan preparados? */
.ready .grid { display: grid; grid-template-columns: 700px 1fr; gap: 64px; margin-top: 36px; }
.ready .grid .frame { height: 420px; }
.ready .src { font-size: 25px; line-height: 1.5; color: var(--text); }
.ready ul.bul { list-style: none; margin-top: 20px; }
.ready ul.bul li { position: relative; padding-left: 40px; font-size: 26px; line-height: 1.45; margin-bottom: 14px; }
.ready ul.bul li::before { content: ""; position: absolute; left: 4px; top: 14px; width: 14px; height: 14px; border-radius: 4px; background: var(--red); transform: rotate(45deg); }
.ready .stats { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 24px; margin-top: 34px; }
.ready .stat { padding: 24px 28px; }
.ready .stat .n { font: 600 64px/1 var(--serif); color: var(--navy); font-variation-settings: "opsz" 144; display: flex; gap: 18px; align-items: baseline; }
.ready .stat .n small { font-size: 30px; color: var(--muted); font-weight: 500; }
.ready .stat .n .sep { color: rgba(22,59,99,.25); font-weight: 300; }
.ready .stat p { font-size: 19px; line-height: 1.4; color: var(--muted); margin-top: 10px; }
.ready .stat.hot .n { color: var(--red); }
.ready .stat.cool .n { color: var(--teal); }

/* 16 — Pregunta del problema */
.ask-fig .q { margin-top: 26px; text-align: center; font: 500 40px/1.3 var(--sans); color: var(--ink); }
.ask-fig .q b { font-family: var(--serif); font-style: italic; font-weight: 600; color: var(--red); }

/* 17 — Tres lentes */
.lenses .cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 44px; position: relative; }
.lenses .lens-card { padding: 34px 36px 30px; border-radius: 30px; position: relative; min-height: 470px; }
.lenses .lens-card .ic { width: 82px; height: 82px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 18px; }
.lenses .lens-card h3 { font: 700 21px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 18px; }
.lenses .lens-card li { list-style: none; font: 500 29px/1.5 var(--sans); color: var(--text); }
.lenses .lens-card li.lead-in { font: 600 italic 30px/1.3 var(--serif); margin-bottom: 8px; }
.lenses .l1 { background: #EAF1F8; border: 2px solid rgba(31,78,121,.35); }
.lenses .l1 h3, .lenses .l1 li.lead-in { color: var(--navy-2); }
.lenses .l1 .ic { background: var(--navy-2); }
.lenses .l2 { background: #E5F4F1; border: 2px solid rgba(18,135,122,.4); }
.lenses .l2 h3 { color: var(--teal); }
.lenses .l2 .ic { background: var(--teal); }
.lenses .l2 .dn { color: var(--teal); font-size: 26px; line-height: 1; margin: 2px 0 2px 4px; }
.lenses .l3 { background: #FDF2E4; border: 2px solid rgba(232,111,60,.45); }
.lenses .l3 h3 { color: #D9622B; }
.lenses .l3 .ic { background: #E8703C; }
.lenses .l3 li { display: flex; gap: 14px; align-items: baseline; }
.lenses .l3 li::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: #E8703C; flex: 0 0 auto; transform: translateY(-4px); }
.lenses .decision {
  margin: 44px auto 0; width: 1400px; text-align: center; padding: 30px 40px; border-radius: 24px;
  background: var(--ink-2); color: #fff; font: 500 34px/1.35 var(--sans);
  box-shadow: 0 30px 60px -30px rgba(12,22,38,.8);
}
.lenses .decision b { font-family: var(--serif); font-style: italic; color: #FFC46B; font-weight: 600; }
.lenses .conn { position: absolute; left: 0; right: 0; top: 0; height: 100%; pointer-events: none; }

/* 18 — Definición */
.def .defq {
  font: 400 italic 39px/1.32 var(--serif); color: var(--ink-2); font-variation-settings: "opsz" 144;
  max-width: 1600px;
}
.def .defq b { font-style: normal; font-weight: 600; color: var(--navy); }
.def .defq .k { color: var(--teal); font-weight: 600; }
.def .grid { display: grid; grid-template-columns: 660px 1fr 1fr; gap: 36px; margin-top: 40px; }
.def .grid .frame { height: 470px; }
.def .grid .frame img { object-position: 50% 50%; }
.def .box { padding: 30px 30px 26px; border-radius: 26px; }
.def .stay { background: #EAF1F8; border: 2px solid rgba(31,78,121,.3); }
.def .move { background: #FFF6EC; border: 2px dashed rgba(255,122,26,.55); }
.def .box h3 { font: 700 19px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 20px; display: flex; gap: 12px; align-items: center; }
.def .stay h3 { color: var(--navy-2); }
.def .move h3 { color: #C55A12; }
.def .stay li { list-style: none; position: relative; padding-left: 40px; font: 500 23px/1.4 var(--sans); margin-bottom: 14px; }
.def .stay li::before { content: ""; position: absolute; left: 0; top: 7px; width: 22px; height: 22px; border-radius: 6px; background: var(--navy-2); box-shadow: inset 0 0 0 5px #EAF1F8; outline: 2px solid var(--navy-2); }
.def .move .chips { display: flex; flex-wrap: wrap; gap: 12px; }
.def .move .chip { font-size: 20px; padding: 10px 16px; }
.slide.active .def-anim .chip { animation: drift 6s ease-in-out infinite; }
.def .move .chip:nth-child(2n) { --drift: -1.5s; }
.def .move .chip:nth-child(3n) { --drift: -3s; }
.slide.active .def-anim.on .chip.seq { animation: seq-fade .7s var(--ease) both, drift 6s ease-in-out infinite; animation-delay: calc(var(--i) * var(--seq-step) + var(--seq-start)), var(--drift, 0s); }
@keyframes drift { 0%,100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-5px) rotate(-1deg); } }

/* 19 — Permanece / cambia */
.split .formula {
  margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-radius: 22px; overflow: hidden;
  box-shadow: 0 18px 50px -24px rgba(12,22,38,.45);
}
.split .formula > div { padding: 22px 32px; font: 500 28px/1.35 var(--sans); display: flex; gap: 18px; align-items: center; }
.split .formula .p { background: var(--navy-2); color: #fff; }
.split .formula .c { background: #FFE9D6; color: #7A3608; }
.split .formula b { font: 700 18px/1 var(--sans); letter-spacing: .22em; padding: 9px 12px; border-radius: 8px; }
.split .formula .p b { background: rgba(255,255,255,.16); }
.split .formula .c b { background: rgba(255,122,26,.2); color: #B54C0A; }
.split .pic { margin-top: 26px; height: 680px; }
.split .pic img { width: 100%; height: 100%; object-fit: contain; }

/* 20 — Tabla de diseño */
.design table { width: 100%; border-collapse: separate; border-spacing: 0; margin-top: 30px; }
.design th { text-align: left; font: 700 17px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); padding: 0 22px 14px; border-bottom: 2px solid var(--navy-2); }
.design td { padding: 13px 22px; border-bottom: 1px solid var(--line); vertical-align: top; }
.design td.n { width: 70px; font: 500 italic 22px/1.4 var(--serif); color: var(--orange); padding-right: 0; }
.design td.d { width: 430px; font: 700 24px/1.35 var(--sans); color: var(--navy); }
.design td.q { font: 400 24px/1.38 var(--sans); color: var(--text); }
.design tr:hover td { background: rgba(47,184,234,.07); }
.slide.active .design tbody tr { animation: rise .8s var(--ease) both; animation-delay: calc(var(--r) * var(--seq-step) + 500ms); }

/* 21 — Exploración interactiva */
.explore .grid { display: grid; grid-template-columns: 1100px 1fr; gap: 48px; margin-top: 26px; }
.explore .stagefig { padding: 22px 30px 10px; }
.explore .ctrl { display: flex; align-items: center; gap: 24px; padding: 14px 30px 26px; }
.explore .ctrl label { font: italic 600 34px/1 var(--math); color: var(--red); white-space: nowrap; min-width: 190px; }
.explore input[type=range] { flex: 1; -webkit-appearance: none; appearance: none; height: 10px; border-radius: 6px; background: linear-gradient(90deg, var(--red) var(--p, 50%), #E1E6EE var(--p, 50%)); outline: none; }
.explore input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 38px; height: 38px; border-radius: 50%; background: #fff; border: 4px solid var(--red); box-shadow: 0 6px 16px rgba(238,65,54,.4); cursor: grab; }
.explore input[type=range]::-moz-range-thumb { width: 32px; height: 32px; border-radius: 50%; background: #fff; border: 4px solid var(--red); cursor: grab; }
.explore .play { width: 62px; height: 62px; border-radius: 50%; background: var(--ink-2); color: #fff; display: grid; place-items: center; flex: 0 0 auto; box-shadow: 0 10px 24px -8px rgba(12,22,38,.6); }
.explore .play svg { width: 26px; height: 26px; }
.explore .read { display: flex; flex-direction: column; gap: 22px; }
.explore .meter { padding: 22px 28px 16px; }
.explore .meter .lbl { font: 700 17px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); display: flex; justify-content: space-between; align-items: center; }
.explore .meter .val { font: 600 76px/1 var(--serif); font-variation-settings: "opsz" 144; color: var(--navy); margin: 10px 0 4px; font-variant-numeric: tabular-nums; }
.explore .meter .val small { font: 500 24px/1 var(--sans); color: var(--muted); margin-left: 10px; }
.explore .meter.p .val { color: var(--teal); }
.explore .meter.a .val { color: var(--orange); }
.explore .badge { font: 700 14px/1 var(--sans); letter-spacing: .14em; padding: 8px 12px; border-radius: 999px; background: rgba(18,135,122,.12); color: var(--teal); }
.explore .badge.o { background: rgba(255,122,26,.13); color: #C55A12; }
.explore .pulse { animation: pulse .6s ease; }
@keyframes pulse { 0% { transform: scale(1); } 40% { transform: scale(1.06); } 100% { transform: scale(1); } }
.explore svg.mini { width: 100%; height: 150px; display: block; }
.explore svg.mini .ax { stroke: #C5CDD8; stroke-width: 1.5; }
.explore svg.mini .cv { fill: none; stroke-width: 4; stroke-linecap: round; }
.explore svg.mini .t { font: 500 15px var(--sans); fill: var(--muted); }
.explore .alg { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; margin-top: 18px; }
.explore .alg > div { padding: 18px 22px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
.explore .alg small { display: block; font: 700 14px/1 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.explore .alg .m { font: italic 27px/1.3 var(--math); color: var(--ink); }
.explore .alg .m .up { font-style: normal; }
.explore .alg .note { font: 400 18px/1.4 var(--sans); color: var(--muted); margin-top: 6px; }

/* 22 — Tres mediaciones */
.med .cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 32px; }
.med .mc { padding: 0; overflow: hidden; border-radius: 26px; }
.med .mc .hd { padding: 22px 28px 18px; display: flex; gap: 18px; align-items: center; color: #fff; }
.med .mc .hd .lt { width: 58px; height: 58px; border-radius: 50%; background: rgba(255,255,255,.95); display: grid; place-items: center; font: 700 30px/1 var(--sans); flex: 0 0 auto; }
.med .mc .hd h3 { color: #fff; font: 600 30px/1.1 var(--serif); }
.med .mc .hd p { font: 500 17px/1.3 var(--sans); opacity: .9; margin-top: 4px; }
.med .mc .bd { padding: 22px 28px 26px; background: #fff; }
.med .mc .bd li { list-style: none; position: relative; padding-left: 26px; font: 400 21.5px/1.42 var(--sans); margin-bottom: 10px; }
.med .mc .bd li::before { content: "›"; position: absolute; left: 4px; top: -2px; font: 700 26px/1.3 var(--sans); }
.med .a .hd { background: linear-gradient(135deg, #EE4136, #C9302A); } .med .a .lt { color: #C9302A; } .med .a li::before { color: #EE4136; }
.med .b .hd { background: linear-gradient(135deg, #17A39A, #0F7F75); } .med .b .lt { color: #0F7F75; } .med .b li::before { color: #12877A; }
.med .c .hd { background: linear-gradient(135deg, #2462A8, #163B63); } .med .c .lt { color: #163B63; } .med .c li::before { color: #2462A8; }
.med .core {
  margin-top: 26px; padding: 22px 30px; border-radius: 22px; background: #FFF7E1; border: 2px solid rgba(242,182,48,.6);
  display: grid; grid-template-columns: 250px repeat(3, 1fr); gap: 24px; align-items: center;
}
.med .core h4 { font: 700 17px/1.3 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: #8A6410; }
.med .core div { font: 500 21px/1.38 var(--sans); }
.med .core div b { display: block; font: 600 italic 24px/1.2 var(--serif); color: var(--navy); margin-bottom: 4px; }
.med .core .m { font-family: var(--math); font-style: italic; }
.med .eqty {
  margin-top: 22px; text-align: center; font: 500 30px/1.35 var(--sans); color: var(--ink);
}
.med .eqty b { color: var(--orange); font-family: var(--serif); font-style: italic; font-size: 36px; }

/* 22a–c — Una diapositiva por mediación (A, B, C): tres escenas, un clic cada una.
   El estilo base es el estado final; las animaciones parten de oculto (fill: both),
   así la vista estática, la impresión y las miniaturas muestran la escena completa. */
.mx-a { --acc: #D8352B; --acc-soft: rgba(238,65,54,.11); --acc-g: linear-gradient(135deg, #EE4136, #C9302A); }
.mx-b { --acc: #0F7F75; --acc-soft: rgba(18,135,122,.11); --acc-g: linear-gradient(135deg, #17A39A, #0F7F75); }
.mx-c { --acc: #2462A8; --acc-soft: rgba(36,98,168,.11); --acc-g: linear-gradient(135deg, #2462A8, #163B63); }
.mx .mx-head { display: flex; align-items: center; gap: 26px; margin-top: 20px; }
.mx .mx-head .lt { width: 84px; height: 84px; border-radius: 50%; background: var(--acc-g); color: #fff; display: grid; place-items: center; font: 700 44px/1 var(--sans); flex: 0 0 auto; box-shadow: 0 14px 30px -12px var(--acc); }
.mx .mx-head .title { margin-top: 0; font-size: 60px; }
.mx .mx-head .title em { color: var(--acc); }
.mx .mx-head .res { margin-top: 6px; font: 600 19px/1.3 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.mx .pnls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; height: 690px; }
.mx .pnl { background: #fff; border-radius: 24px; overflow: hidden; display: flex; flex-direction: column; border-top: 6px solid var(--acc); box-shadow: 0 1px 0 rgba(22,59,99,.06), 0 18px 50px -18px rgba(22,59,99,.28); }
.mx .pnl .ph { display: flex; gap: 16px; align-items: flex-start; padding: 20px 24px 16px; min-height: 104px; border-bottom: 1px solid var(--line); }
.mx .pnl .ph i { flex: 0 0 auto; width: 44px; height: 44px; border-radius: 50%; background: var(--acc-soft); color: var(--acc); display: grid; place-items: center; font: 600 italic 26px/1 var(--serif); }
.mx .pnl .ph p { font: 500 21px/1.38 var(--sans); color: var(--ink); }
.mx .pnl .pb { flex: 1; min-height: 0; position: relative; padding: 16px 20px; display: grid; place-items: center; }
.mx svg.ill { width: 100%; height: 100%; overflow: visible; }

/* Utilidades de animación por escena */
.mx .an-draw { stroke-dasharray: 1 1; }
.mx .an-pop { transform-box: fill-box; transform-origin: center; }
.mx .an-gone { opacity: 0; }
.mx .an-dots { opacity: 0; }
.slide.active .pnl.on .an-draw { animation: mxdraw var(--du, .9s) ease-in-out both var(--dl, 0s); }
.slide.active .pnl.on .an-fade { animation: mxfade .6s var(--ease) both var(--dl, 0s); }
.slide.active .pnl.on .an-write { animation: mxwrite var(--du, .45s) linear both var(--dl, 0s); }
.slide.active .pnl.on .an-pop { animation: mxpop .55s cubic-bezier(.3, 1.5, .5, 1) both var(--dl, 0s); }
.slide.active .pnl.on .an-gone { animation: mxgone 1.5s ease both var(--dl, 0s); }
.slide.active .pnl.on .an-bar { animation: mxbar 1.1s var(--ease) both var(--dl, 0s); }
.slide.active .pnl.on .an-stick { animation: mxstick .6s cubic-bezier(.3, 1.4, .5, 1) both var(--dl, 0s); }
.slide.active .pnl.on .an-dots { animation: mxdots .95s linear both var(--dl, 0s); }
@keyframes mxdraw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes mxfade { from { opacity: 0; transform: translateY(8px); } }
@keyframes mxwrite { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }
@keyframes mxpop { from { opacity: 0; transform: scale(.4); } }
@keyframes mxgone { 0%, 30% { opacity: 1; } 100% { opacity: 0; } }
@keyframes mxbar { from { transform: scaleX(0); } }
@keyframes mxstick { from { opacity: 0; transform: rotate(var(--r)) translateY(-34px) scale(1.25); } to { transform: rotate(var(--r)); } }
@keyframes mxdots { 0%, 85% { opacity: 1; } 100% { opacity: 0; } }

/* A · papel y lápiz */
.mx .pen { fill: none; stroke: #2B3440; stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round; }
.mx .pen.thin { stroke-width: 2; stroke-dasharray: 1 1; }
.mx .hand { font: italic 500 24px/1 var(--serif); fill: #2B3440; }
.mx .hand.sm { font-size: 19px; }
.mx .nb { width: 100%; height: 100%; padding: 26px 22px 18px 58px; border-radius: 14px; position: relative;
  background: #FFFEF8 repeating-linear-gradient(transparent 0 43px, rgba(47,120,200,.28) 43px 44px);
  box-shadow: inset 0 0 0 1px rgba(22,59,99,.08); }
.mx .nb::before { content: ""; position: absolute; left: 40px; top: 0; bottom: 0; width: 2px; background: rgba(238,65,54,.45); }
.mx .nb .tb { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); row-gap: 4px; margin-top: 6px; }
.mx .nb .tb span { display: block; font: italic 500 30px/40px var(--serif); color: #24303F; text-align: center; }
.mx .nb .tb span.h { font: 700 15px/40px var(--sans); letter-spacing: .05em; text-transform: uppercase; color: var(--acc); border-bottom: 2px solid #2B3440; }
.mx .nb .tb span.pc { color: var(--red); font-weight: 700; }
.mx .nb .ring { grid-column: 4; grid-row: 2 / 5; position: absolute; inset: -6px 2px -4px; border: 3px solid var(--red); border-radius: 50%; transform: rotate(-3deg); pointer-events: none; }
.mx .nb .hand { display: block; font: italic 600 26px/1.3 var(--serif); color: var(--red); }
.mx .nb .note { margin-top: 30px; }
.mx .nb .note2 { margin-top: 14px; color: #2B3440; font-weight: 500; font-size: 23px; }
.mx .strip { fill: none; stroke-width: 9; stroke-linejoin: miter; }
.slide.active .pnl.on .strip { animation: 1.5s cubic-bezier(.55, 0, .35, 1) both var(--dl, 0s); }
.slide.active .pnl.on .strip.st1 { animation-name: mxst1; }
.slide.active .pnl.on .strip.st2 { animation-name: mxst2; }
.slide.active .pnl.on .strip.st3 { animation-name: mxst3; }
@keyframes mxst1 { 0%, 18% { d: path("M30 130L222 130L222 114L30 114L30 130"); } 100% { d: path("M30 130L222 130L238 130L430 130L446 130"); } }
@keyframes mxst2 { 0%, 18% { d: path("M30 290L198 290L198 250L30 250L30 290"); } 100% { d: path("M30 290L198 290L238 290L406 290L446 290"); } }
@keyframes mxst3 { 0%, 18% { d: path("M30 450L174 450L174 386L30 386L30 450"); } 100% { d: path("M30 450L174 450L238 450L382 450L446 450"); } }

/* B · proyector, votación y tablero */
.mx .proj { position: relative; width: 100%; height: 100%; display: flex; flex-direction: column; justify-content: space-between; }
.mx .proj .beam { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.mx .proj .screen { position: relative; z-index: 1; }
.mx .proj .roll { height: 14px; border-radius: 7px; background: linear-gradient(#56606E, #2B3440); margin: 0 -6px; }
.mx .proj .scr { background: #fff; border: 1px solid #D9DEE6; border-top: 0; box-shadow: 0 18px 40px -18px rgba(12,22,38,.45); padding: 0 14px 10px; }
.mx .proj .gg { display: flex; align-items: center; gap: 8px; padding: 8px 0 4px; font: 600 14px/1 var(--sans); color: var(--muted); letter-spacing: .04em; }
.mx .proj .gg i { width: 12px; height: 12px; border-radius: 50%; border: 2.5px solid #6557D2; }
.mx .proj svg.mxfig { display: block; width: 100%; height: auto; }
.mx .proj .gctl { display: flex; align-items: center; gap: 14px; margin-top: 2px; }
.mx .proj .gctl label { font: italic 600 22px/1 var(--math); color: var(--red); white-space: nowrap; min-width: 112px; }
.mx .proj input[type=range] { flex: 1; -webkit-appearance: none; appearance: none; height: 8px; border-radius: 5px; background: linear-gradient(90deg, var(--red) var(--p, 50%), #E1E6EE var(--p, 50%)); outline: none; }
.mx .proj input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 26px; height: 26px; border-radius: 50%; background: #fff; border: 3px solid var(--red); cursor: grab; }
.mx .proj input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: #fff; border: 3px solid var(--red); cursor: grab; }
.mx .proj .grd { display: flex; gap: 26px; margin-top: 8px; font: italic 22px/1 var(--math); color: var(--ink); }
.mx .proj .grd b { font-style: normal; font-family: var(--sans); }
.mx .proj .grd span:first-child b { color: var(--teal); }
.mx .proj .grd span:last-child b { color: var(--orange); }
.mx .proj .crowd { position: relative; z-index: 1; width: 100%; height: auto; }
.mx .poll { width: 100%; }
.mx .poll .q { font: 600 24px/1.35 var(--sans); color: var(--ink); }
.mx .poll .hands { display: flex; gap: 6px; margin: 18px 0 22px; }
.mx .poll .hands span { width: 30px; height: 30px; color: var(--acc); }
.mx .poll .hands svg { width: 100%; height: 100%; fill: var(--acc-soft); stroke: currentColor; stroke-width: 1.6; stroke-linejoin: round; }
.mx .poll .opt { position: relative; display: grid; grid-template-columns: 176px 1fr 66px; align-items: center; gap: 12px; margin-bottom: 16px; padding: 10px 14px; border-radius: 14px; background: #F6F8FB; }
.mx .poll .opt .lab { font: 600 21px/1.2 var(--sans); color: var(--ink); }
.mx .poll .opt .bar { height: 16px; border-radius: 8px; background: #E4E9F0; overflow: hidden; }
.mx .poll .opt .bar i { display: block; height: 100%; border-radius: 8px; background: #9AA8B8; transform-origin: 0 50%; }
.mx .poll .opt b { font: 700 21px/1 var(--sans); color: var(--muted); text-align: right; }
.mx .poll .opt.ok { background: var(--acc-soft); box-shadow: inset 0 0 0 2px var(--acc); }
.mx .poll .opt.ok .bar i { background: var(--acc); }
.mx .poll .opt.ok b { color: var(--acc); }
.mx .poll .chk { position: absolute; right: -12px; top: -12px; width: 34px; height: 34px; border-radius: 50%; background: var(--acc); color: #fff; display: grid; place-items: center; font: 700 20px/1 var(--sans); font-style: normal; }
.mx .poll .vrd { margin-top: 14px; font: 500 20px/1.4 var(--sans); color: var(--text); }
.mx .poll .vrd b { color: var(--teal); }
.mx .board { width: 100%; height: 100%; border-radius: 12px; border: 12px solid #8B5E34; padding: 18px 18px 14px;
  background: radial-gradient(ellipse at 30% 20%, #2F5D4C, #1E4436 70%); box-shadow: inset 0 0 40px rgba(0,0,0,.35), 0 14px 30px -14px rgba(0,0,0,.5); display: flex; flex-direction: column; }
.mx .board .chalk { align-self: flex-start; font: italic 500 30px/1.2 var(--serif); color: #F4F1E6; text-shadow: 0 0 2px rgba(255,255,255,.5); border-bottom: 2px solid rgba(244,241,230,.55); padding-bottom: 4px; }
.mx .board .stk { flex: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding-top: 22px; }
.mx .sticky { position: relative; transform: rotate(var(--r)); padding: 18px 18px 40px; font: 500 22px/1.38 var(--sans); color: #1F2732; box-shadow: 0 10px 18px -8px rgba(0,0,0,.55); }
.mx .sticky b { font-weight: 700; }
.mx .sticky small { position: absolute; left: 16px; bottom: 12px; font: italic 600 15px/1 var(--serif); color: rgba(31,39,50,.65); }
.mx .sticky.y { background: #FFE97A; } .mx .sticky.p { background: #FFB8C6; } .mx .sticky.b { background: #A9DDF5; } .mx .sticky.g { background: #B8EBA6; }

/* C · hoja de cálculo, gráficas, chat */
.mx .sheet { width: 100%; border-radius: 12px; overflow: hidden; border: 1px solid #CDD5DF; background: #fff; box-shadow: 0 14px 30px -18px rgba(12,22,38,.4); }
.mx .sheet .win { display: flex; align-items: center; gap: 7px; padding: 9px 12px; background: #1D6F42; color: #fff; font: 600 14px/1 var(--sans); }
.mx .sheet .win i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.55); }
.mx .sheet .win span { margin-left: 8px; }
.mx .sheet .fx { display: flex; align-items: center; gap: 12px; padding: 8px 12px; border-bottom: 1px solid #DCE2EA; font: 500 18px/1.2 var(--mono); color: var(--ink); }
.mx .sheet .fx b { font: italic 700 18px/1 var(--serif); color: var(--muted); padding-right: 12px; border-right: 1px solid #DCE2EA; }
.mx .sheet .fx span { display: inline-block; }
.mx .sheet .sg { display: grid; grid-template-columns: 40px 1fr 1fr 1fr; }
.mx .sheet .sg span { height: 34px; display: grid; place-items: center; border-right: 1px solid #E6EAF0; border-bottom: 1px solid #E6EAF0; font: 500 18px/1 var(--mono); color: var(--ink); }
.mx .sheet .sg .ch, .mx .sheet .sg .rn { background: #F2F4F7; color: var(--muted); font: 600 14px/1 var(--sans); }
.mx .sheet .sg .hd { font: italic 600 19px/1 var(--math); background: #FAFBFC; }
.mx .sheet .sg .hd.b { color: var(--teal); box-shadow: inset 0 -3px 0 var(--teal); }
.mx .sheet .sg .hd.c { color: var(--orange); box-shadow: inset 0 -3px 0 var(--orange); }
.mx .sheet .sg .cb { color: var(--teal); font-weight: 700; }
.mx .sheet .sg .cb.sel { box-shadow: inset 0 0 0 2.5px #1D6F42; }
.mx .sheet .sg .cc { color: #C25A10; }
.mx .sheet .cap, .mx .chat .cap { padding: 10px 14px; font: 500 19px/1.3 var(--sans); color: var(--text); text-align: center; }
.mx .sheet .cap .t { color: var(--teal); } .mx .sheet .cap .o { color: var(--orange); }
.mx .gph .ax { stroke: #3D4A5C; stroke-width: 2.5; }
.mx .gph text { font: 500 17px var(--sans); fill: var(--muted); }
.mx .gph text.vx { font: italic 600 22px var(--math); fill: var(--ink); }
.mx .gph text.lg { font: italic 600 19px var(--math); fill: var(--ink); }
.mx .gph .cv { fill: none; stroke-width: 5; stroke-linecap: round; }
.mx .chat { width: 100%; height: 100%; display: flex; flex-direction: column; border-radius: 14px; background: #F4F6FA; border: 1px solid #DCE2EA; overflow: hidden; }
.mx .chat .top { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: #fff; border-bottom: 1px solid #DCE2EA; font: 700 17px/1 var(--sans); color: var(--ink); }
.mx .chat .top small { font: 500 14px/1 var(--sans); color: var(--muted); }
.mx .chat .av { width: 30px; height: 30px; border-radius: 50%; background: var(--acc-g); display: grid; place-items: center; flex: 0 0 auto; }
.mx .chat .av svg { width: 17px; height: 17px; fill: #fff; }
.mx .chat .msgs { flex: 1; display: flex; flex-direction: column; gap: 12px; padding: 14px; }
.mx .chat .msg { display: flex; gap: 8px; align-items: flex-end; max-width: 92%; }
.mx .chat .msg p { position: relative; padding: 10px 14px; border-radius: 16px; font: 400 17.5px/1.38 var(--sans); }
.mx .chat .msg.me { align-self: flex-end; }
.mx .chat .msg.me p { background: var(--acc); color: #fff; border-bottom-right-radius: 4px; }
.mx .chat .msg.ai p { background: #fff; color: var(--ink); border-bottom-left-radius: 4px; box-shadow: 0 1px 0 rgba(22,59,99,.08); }
.mx .chat .msg .dots { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); display: flex; gap: 5px; }
.mx .chat .msg .dots i { width: 8px; height: 8px; border-radius: 50%; background: #9AA8B8; animation: mxbounce 1s ease-in-out infinite; }
.mx .chat .msg .dots i:nth-child(2) { animation-delay: .15s; } .mx .chat .msg .dots i:nth-child(3) { animation-delay: .3s; }
@keyframes mxbounce { 0%, 100% { transform: translateY(0); } 40% { transform: translateY(-5px); } }
.mx .chat .cap { background: #fff; border-top: 1px solid #DCE2EA; }
.mx .chat .cap b, .mx .sheet .cap b { display: inline; margin: 0; font: inherit; font-weight: 700; color: var(--acc); }
.mx .sheet .cap b { font-family: var(--math); font-style: italic; }

/* 25b — Ir más allá: la misma figura cercada como corral y como huerto */
.mx-d { --acc: #C9620E; --acc-soft: rgba(255,122,26,.12); --acc-g: linear-gradient(135deg, #FF9A3C, #D9650C); }
.mx-d .mx-head .res { text-transform: none; letter-spacing: 0; font: 500 24px/1.3 var(--sans); color: var(--text); }
.mx-d .ctx { display: grid; grid-template-columns: 1fr 64px 1fr; align-items: center; margin-top: 26px; }
.mx-d .ctx .pnl { padding: 14px 18px 12px; border-top-width: 5px; }
.mx-d .ctx figcaption { font: 500 22px/1.2 var(--sans); color: var(--ink); margin-bottom: 8px; }
.mx-d .ctx figcaption b { color: var(--acc); }
.mx-d .ctx .eq { justify-self: center; width: 52px; height: 52px; border-radius: 50%; background: var(--acc-g); color: #fff; display: grid; place-items: center; font: 700 34px/1 var(--sans); box-shadow: 0 10px 22px -10px var(--acc); }
.mx-d svg.ill { display: block; width: 100%; height: auto; }
.mx-d .rail { fill: none; stroke: #8B5A2B; stroke-width: 3; }
.mx-d .post { fill: #5E3A1E; }
.mx-d .lbl { font: 700 17px var(--sans); fill: #A85410; letter-spacing: .06em; }
.mx-d .lbl.m { font: italic 600 18px var(--math); fill: var(--ink); letter-spacing: 0; }
.mx-d .qbox { margin-top: 20px; padding: 18px 26px; border-top-width: 5px; }
.mx-d .qs { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 40px; }
.mx-d .qs li { display: flex; gap: 14px; align-items: flex-start; font: 400 19.5px/1.38 var(--sans); color: var(--text); }
.mx-d .qs li i { flex: 0 0 auto; width: 30px; height: 30px; margin-top: 1px; border-radius: 50%; background: var(--acc-soft); color: var(--acc); display: grid; place-items: center; font: 700 18px/1 var(--serif); font-style: normal; }
.mx-d .qs li b { color: var(--acc); }
.mx-d .beyond { margin-top: 16px; text-align: center; font: 500 25px/1.4 var(--sans); color: var(--ink); }
.mx-d .beyond b { font-family: var(--serif); font-style: italic; color: var(--acc); }
.mx-d .beyond .lx { font: italic 26px/1 var(--math); color: var(--muted); white-space: nowrap; }

/* 24 — Problema de las monedas */
.coins .grid { display: grid; grid-template-columns: 860px 1fr; gap: 70px; margin-top: 30px; }
.coins .setup { font: 400 31px/1.45 var(--sans); color: var(--ink); }
.coins .setup b { color: var(--navy); }
.coins .pic { margin-top: 30px; height: 470px; }
.coins .pic img { object-fit: cover; }
.coins .tasks { display: flex; flex-direction: column; gap: 26px; }
.coins .task { padding: 28px 32px; }
.coins .task .verb { font: 700 18px/1 var(--sans); letter-spacing: .22em; text-transform: uppercase; margin-bottom: 12px; display: flex; gap: 12px; align-items: center; }
.coins .task .verb i { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; color: #fff; font: 600 italic 18px/1 var(--serif); }
.coins .task p { font: 500 30px/1.38 var(--sans); color: var(--ink); }
.coins .t1 .verb { color: var(--red); } .coins .t1 .verb i { background: var(--red); }
.coins .t2 .verb { color: var(--teal); } .coins .t2 .verb i { background: var(--teal); }
.coins .t3 .verb { color: var(--navy-2); } .coins .t3 .verb i { background: var(--navy-2); }

/* Monedas (dibujadas en CSS) */
.coin {
  --s: 44px; width: var(--s); height: var(--s); border-radius: 50%; display: inline-grid; place-items: center;
  font: 800 calc(var(--s) * .3)/1 var(--sans); color: rgba(60,40,10,.85); letter-spacing: -.02em;
  box-shadow: 0 3px 6px rgba(0,0,0,.25), inset 0 -3px 5px rgba(0,0,0,.18), inset 0 2px 3px rgba(255,255,255,.6);
  flex: 0 0 auto;
}
.coin.c100 { background: radial-gradient(circle at 35% 30%, #FFF1BE 0%, #E8BE55 38%, #C08D2A 75%, #9C6E1B 100%); }
.coin.c200 { background: radial-gradient(circle at 35% 30%, #FFFFFF 0%, #D9DEE5 40%, #A9B1BC 78%, #8A929D 100%); color: rgba(30,36,44,.8); }
.coin.c500 { background: radial-gradient(circle at 50% 50%, #E2B65C 0 40%, #6E5524 41% 43%, #D5DAE1 44% 70%, #A3ABB6 100%); color: rgba(50,30,5,.9); }

/* 25 — Tabla de soluciones */
.sols .grid { display: grid; grid-template-columns: 1010px 1fr; gap: 44px; margin-top: 22px; }
.sols table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.sols th { font: 700 15px/1.2 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); text-align: center; padding: 0 8px 10px; border-bottom: 2px solid var(--orange); }
.sols th .coin { --s: 26px; vertical-align: middle; margin-right: 6px; }
.sols td { text-align: center; font: 500 21px/1 var(--sans); padding: 6.5px 8px; border-bottom: 1px solid rgba(255,122,26,.18); color: var(--text); }
.sols td:first-child { font: 600 italic 20px/1 var(--serif); color: var(--orange); }
.sols td.tot { font-weight: 700; color: var(--navy); }
.sols td.each { font-weight: 700; color: var(--teal); }
.sols tbody tr { cursor: pointer; transition: background .2s; }
.sols tbody tr.mark td { background: rgba(238,65,54,.10); }
.sols tbody tr:hover td { background: rgba(47,184,234,.12); }
.sols tbody tr.sel td { background: var(--ink-2); color: #fff; }
.sols tbody tr.sel td:first-child { color: #FFC46B; }
.sols tbody tr.sel td.tot, .sols tbody tr.sel td.each { color: #9EE6F7; }
.sols .panel { padding: 28px 30px; position: relative; min-height: 820px; }
.sols .panel .lbl { font: 700 15px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.sols .panel h3 { font: 600 40px/1.1 var(--serif); margin: 10px 0 4px; }
.sols .panel .sub { font: 500 20px/1.4 var(--sans); color: var(--muted); }
.sols .panel .tbl { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 8px; }
.sols .panel .tbl .coin { --s: 46px; }
.sols .panel .bro { display: grid; grid-template-columns: 120px 1fr 90px; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.sols .panel .bro .who { font: 600 18px/1.2 var(--sans); color: var(--navy); }
.sols .panel .bro .cs { display: flex; flex-wrap: wrap; gap: 5px; }
.sols .panel .bro .cs .coin { --s: 36px; }
.sols .panel .bro .sum { font: 700 22px/1 var(--sans); color: var(--teal); text-align: right; font-variant-numeric: tabular-nums; }
.sols .panel .warn { margin-top: 14px; padding: 18px 20px; border-radius: 16px; background: #FFF0EE; border: 1.5px solid rgba(238,65,54,.45); font: 500 19px/1.45 var(--sans); color: #7C1E17; }
.sols .panel .warn b { color: var(--red); }
.sols .panel .hint { position: absolute; left: 30px; right: 30px; bottom: 24px; font: 500 16px/1.4 var(--sans); color: var(--muted); display: flex; gap: 10px; align-items: center; }
.sols .panel .split-h { font: 700 15px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); margin: 20px 0 4px; }

/* 26 — Fundamentación */
.proof .grid { display: grid; grid-template-columns: 1fr 560px; gap: 60px; margin-top: 30px; }
.proof .steps { display: flex; flex-direction: column; gap: 16px; }
.proof .st { display: grid; grid-template-columns: 54px 1fr; gap: 20px; align-items: start; padding: 18px 26px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
.proof .st .k { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; background: var(--navy-2); color: #fff; font: 600 italic 22px/1 var(--serif); }
.proof .st p { font-size: 24px; line-height: 1.45; }
.proof .st .m { font: italic 28px/1.4 var(--math); color: var(--ink); }
.proof .st .m .up { font-style: normal; }
.proof .st .m .r { color: var(--red); font-style: normal; font-weight: 600; }
.proof .viz { padding: 26px 28px; }
.proof .viz h4 { font: 700 15px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); margin-bottom: 18px; }
.proof .viz .rowa { display: grid; grid-template-columns: 110px 1fr 46px; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); }
.proof .viz .rowa .lab { font: italic 26px/1 var(--math); color: var(--navy); }
.proof .viz .rowa .dots { display: flex; flex-wrap: wrap; gap: 6px; }
.proof .viz .rowa .dots i { width: 30px; height: 30px; border-radius: 50%; background: var(--teal); color: #fff; font: 600 13px/30px var(--sans); text-align: center; font-style: normal; transition: background .4s, box-shadow .4s; }
.proof .viz .rowa .cnt { font: 700 26px/1 var(--serif); color: var(--orange); text-align: right; }
.proof .viz .tot { display: flex; justify-content: space-between; align-items: baseline; margin-top: 16px; font: 600 24px/1 var(--sans); color: var(--navy); }
.proof .viz .tot b { font: 600 56px/1 var(--serif); color: var(--orange); }
.proof.flag .viz .rowa .dots i.bad { background: #fff; color: var(--red); box-shadow: inset 0 0 0 3px var(--red); }
.proof .nb { margin-top: 20px; padding: 22px 28px; border-radius: 20px; background: var(--ink-2); color: #EEF4FA; font: 400 22px/1.5 var(--sans); }
.proof .nb b { color: #FFC46B; }
.proof .nb .t { font: 600 italic 30px/1.2 var(--serif); color: #fff; margin-bottom: 8px; display: block; }

/* 27 — Cierre */
.close .phi { position: absolute; right: -80px; top: -40px; width: 1000px; color: rgba(255,196,107,.22); z-index: 1; }
.close .wrap { top: 92px; }
.close h1 { font-size: 118px; line-height: 1; font-weight: 520; font-variation-settings: "opsz" 144; }
.close h1 em { font-style: italic; color: #FFC46B; font-weight: 400; }
.close .tool { margin-top: 56px; font: 400 48px/1.25 var(--sans); color: rgba(242,239,231,.75); }
.close .tool b { display: block; font: 600 58px/1.15 var(--serif); color: #fff; margin-top: 8px; }
.close .tool b em { color: #7FD6F2; }
.close .pp { margin-top: 44px; display: grid; grid-template-columns: 1fr 1.25fr; gap: 50px; max-width: 1560px; }
.close .pp p { font: 400 27px/1.5 var(--sans); color: rgba(242,239,231,.86); padding-left: 26px; border-left: 3px solid rgba(255,196,107,.6); }
.close .pp p + p { border-left-color: rgba(127,214,242,.6); }
.close .final { position: absolute; left: 112px; right: 112px; bottom: 120px; z-index: 3; font: 400 italic 58px/1.15 var(--serif); color: #FFFDF8; }
.close .final::before { content: ""; display: block; width: 120px; height: 3px; background: linear-gradient(90deg, var(--red), var(--orange), var(--cyan)); margin-bottom: 30px; border-radius: 2px; }
.close .sig { position: absolute; right: 112px; top: 100px; text-align: right; font: 500 21px/1.45 var(--sans); color: rgba(242,239,231,.7); z-index: 3; }
.close .sig b { display: block; font: 600 28px/1.2 var(--serif); color: #fff; }

/* 28-29 — Referencias */
.refs .cols { column-count: 2; column-gap: 70px; margin-top: 30px; }
.refs h3 { font: 700 17px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--orange); margin: 0 0 16px; break-after: avoid; }
.refs h3:not(:first-child) { margin-top: 26px; }
.refs .ref { font: 400 20.5px/1.45 var(--serif); color: var(--text); padding-left: 36px; text-indent: -36px; margin-bottom: 14px; break-inside: avoid; }
.refs .ref i { font-style: italic; }
.refs .ref a { color: var(--navy-2); text-decoration: none; font-family: var(--sans); font-size: 16.5px; word-break: break-all; border-bottom: 1px solid rgba(31,78,121,.25); }
.refs .ref a:hover { color: var(--red); }

/* ======================================================================
   Interfaz: barra de herramientas, vista general, ayuda, presentador
   ====================================================================== */
#toolbar {
  position: fixed; right: 18px; bottom: 18px; z-index: 100;
  display: flex; gap: 6px; padding: 6px; border-radius: 14px;
  background: rgba(10,16,28,.82); backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
  opacity: 0; transform: translateY(10px); transition: opacity .3s, transform .3s;
}
body.ui #toolbar { opacity: 1; transform: none; }
#toolbar button { width: 42px; height: 42px; border-radius: 10px; color: #E9EEF5; display: grid; place-items: center; }
#toolbar button:hover { background: rgba(255,255,255,.12); }
#toolbar svg { width: 20px; height: 20px; }
#toolbar .lang, #pv .lang { display: flex; gap: 2px; padding: 3px; margin: 0 4px; border-radius: 11px; background: rgba(255,255,255,.08); }
#toolbar .lang button, #pv .lang button { width: auto; height: 36px; padding: 0 9px; border-radius: 8px; font: 600 13px/1 var(--sans); letter-spacing: .08em; color: #9FB0C4; }
#toolbar .lang button.on, #pv .lang button.on { background: #FFC46B; color: #1B2533; }
#toolbar .count { color: #9FB0C4; font: 500 13px/42px var(--mono); padding: 0 10px; min-width: 70px; text-align: center; }

#blank { position: fixed; inset: 0; z-index: 90; background: #000; opacity: 0; pointer-events: none; transition: opacity .4s; }
#blank.on { opacity: 1; pointer-events: auto; }
#blank.white { background: #fff; }

#laser { position: absolute; width: 26px; height: 26px; margin: -13px 0 0 -13px; border-radius: 50%; z-index: 80; pointer-events: none; display: none;
  background: radial-gradient(circle, #fff 0 18%, #ff2a2a 30%, rgba(255,42,42,.45) 55%, rgba(255,42,42,0) 72%); }
body.lasering #laser { display: block; }

#overview {
  position: fixed; inset: 0; z-index: 95; overflow: auto; padding: 50px 60px 80px;
  background: rgba(6,10,18,.96); backdrop-filter: blur(6px);
  display: none;
}
#overview.on { display: block; }
#overview h2 { color: #fff; font: 600 34px/1 var(--serif); margin-bottom: 8px; }
#overview .sub { color: #8FA0B6; font: 500 16px/1.4 var(--sans); margin-bottom: 34px; }
#overview .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 30px 26px; }
#overview .tile { cursor: pointer; }
#overview .thumb { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; border-radius: 10px; outline: 2px solid transparent; transition: outline-color .2s, transform .2s; background: #111; }
#overview .tile:hover .thumb { outline-color: rgba(255,255,255,.5); transform: translateY(-3px); }
#overview .tile.cur .thumb { outline: 3px solid var(--orange); }
#overview .thumb .slide { opacity: 1 !important; visibility: visible !important; transform-origin: 0 0; transition: none !important; }
#overview .thumb .slide * { animation: none !important; }
#overview .thumb .f, #overview .thumb .rise, #overview .thumb .seq { opacity: 1 !important; transform: none !important; filter: none !important; }
#overview .meta { display: flex; gap: 12px; margin-top: 10px; color: #C8D3E0; font: 500 14px/1.3 var(--sans); }
#overview .meta b { font-family: var(--mono); color: var(--orange); font-weight: 600; }

#help {
  position: fixed; inset: 0; z-index: 96; display: none; place-items: center; background: rgba(6,10,18,.72); backdrop-filter: blur(6px);
}
#help.on { display: grid; }
#help .box { background: #fff; border-radius: 22px; padding: 40px 48px; width: 760px; box-shadow: 0 40px 100px rgba(0,0,0,.5); }
#help h2 { font: 600 34px/1 var(--serif); color: var(--navy); margin-bottom: 22px; }
#help dl { display: grid; grid-template-columns: 210px 1fr; gap: 12px 20px; font: 500 17px/1.4 var(--sans); }
#help dt { text-align: right; }
#help kbd { font: 600 14px/1 var(--mono); background: #EEF2F7; border: 1px solid #D5DDE7; border-bottom-width: 3px; border-radius: 7px; padding: 5px 9px; margin-left: 4px; color: var(--ink); }
#help .foot-note { margin-top: 24px; font: 400 15px/1.5 var(--sans); color: var(--muted); }

#jump { position: fixed; left: 50%; top: 40px; transform: translateX(-50%); z-index: 97; background: rgba(10,16,28,.9); color: #fff; font: 600 28px/1 var(--mono); padding: 16px 26px; border-radius: 14px; display: none; }
#jump.on { display: block; }

/* ---------- Vista del presentador ---------- */
body.presenter { background: #0A0F18; color: #E6ECF4; }
body.presenter #viewport { position: fixed; left: 24px; top: 92px; width: calc(62vw - 36px); bottom: 24px; border-radius: 12px; }
body.presenter #toolbar { display: none; }
#pv { display: none; }
body.presenter #pv { display: block; }
#pv .bar { position: fixed; left: 24px; right: 24px; top: 18px; height: 56px; display: flex; align-items: center; gap: 28px; font-family: var(--sans); }
#pv .bar .timer { font: 600 40px/1 var(--mono); color: #fff; cursor: pointer; }
#pv .bar .timer.paused { color: #FFC46B; }
#pv .bar .clock { font: 500 22px/1 var(--mono); color: #8FA0B6; }
#pv .bar .pos { font: 600 22px/1 var(--mono); color: var(--orange); }
#pv .bar .ttl { flex: 1; font: 500 18px/1.2 var(--sans); color: #C8D3E0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#pv .bar button { padding: 10px 16px; border-radius: 10px; background: rgba(255,255,255,.08); font: 600 14px/1 var(--sans); color: #E6ECF4; }
#pv .bar button:hover { background: rgba(255,255,255,.16); }
#pv .side { position: fixed; right: 24px; top: 92px; bottom: 24px; width: calc(38vw - 36px); display: flex; flex-direction: column; gap: 18px; }
#pv .nextlbl { font: 700 12px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: #8FA0B6; }
#pv .next { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; border-radius: 10px; background: #111; flex: 0 0 auto; }
#pv .next .slide { opacity: 1 !important; visibility: visible !important; transform-origin: 0 0; transition: none !important; }
#pv .next .slide * { animation: none !important; }
#pv .next .f, #pv .next .rise, #pv .next .seq { opacity: 1 !important; transform: none !important; filter: none !important; }
#pv .notes { flex: 1; overflow: auto; background: #111826; border-radius: 12px; padding: 22px 26px; font: 400 var(--nfs, 22px)/1.55 var(--sans); color: #E6ECF4; }
#pv .notes p { font: inherit; margin-bottom: .7em; }
#pv .notes b { color: #FFC46B; }
#pv .notes .stepinfo { font: 600 13px/1 var(--mono); color: var(--orange); margin-bottom: 14px; letter-spacing: .06em; }
aside.notes { display: none; }

/* ---------- Movimiento reducido ---------- */
@media (prefers-reduced-motion: reduce) {
  .slide, .f { transition-duration: .01s !important; }
  .slide.active .rise, .slide.active .seq, .slide.active .pop, .slide.active .kb, .slide.active .chip, .slide.active svg.phi .sp { animation: none !important; opacity: 1; }
}

/* ---------- Modo estático (capturas / exportación) ---------- */
body.static .f, body.static .rise, body.static .seq { opacity: 1 !important; transform: none !important; filter: none !important; animation: none !important; }
body.static .slide { transition: none !important; }
body.static .slide * { animation-duration: 0s !important; animation-delay: 0s !important; }

/* ---------- Impresión / PDF ---------- */
@media print {
  @page { size: 1920px 1080px; margin: 0; }
  html, body { overflow: visible !important; height: auto !important; background: #fff; }
  #viewport { position: static !important; overflow: visible !important; }
  #stage { position: static !important; transform: none !important; box-shadow: none !important; width: 1920px; height: auto; overflow: visible; background: none; }
  .slide { position: relative !important; opacity: 1 !important; visibility: visible !important; transform: none !important; page-break-after: always; break-after: page; }
  .slide * { animation: none !important; }
  .f, .rise, .seq { opacity: 1 !important; transform: none !important; filter: none !important; }
  #toolbar, #overview, #help, #blank, #laser, #progress, #pv, #jump, .zoom-hint { display: none !important; }
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* ---------- Ajustes tras revisión visual ---------- */
.target .t2 { top: 330px; }
/* Diana: secuencia del pptx (4 clics)
   1 · los libros salen del centro hacia abajo a la izquierda
   2 · los estudiantes viajan al centro de la diana
   3 · aparece el docente · 4 · aparece el «?» */
.target .core { transform: none; margin: -115px 0 0 -115px; }
.target .core.f { opacity: 1; transform: none; z-index: 1; transition: translate 2s cubic-bezier(.5,0,.5,1); }
.target .core.f.on { translate: -690px 350px; }
.target .t2.f { opacity: 1; transform-origin: 165px 165px; transition: translate 2s cubic-bezier(.5,0,.5,1), scale 2s cubic-bezier(.5,0,.5,1); }
.target .t2.f.on { translate: -635px 35px; scale: .72; }
.target .t2 p { transition: opacity .6s; }
.target .t2.f.on p { opacity: 0; }
.target .dia-arrow { position: absolute; left: 560px; top: 150px; width: 760px; height: 760px; z-index: 4; pointer-events: none; }
.maps .m1 { width: 820px; }
.trio .row { margin-top: 30px; }
.trio .flow { margin-top: 46px; }
.ready .stat .n { gap: 14px; }
.ready .stat .n .v { white-space: nowrap; }
.ready .stat .n .v small { font-size: 34px; margin-left: 4px; color: var(--muted); font-weight: 500; }
.def .grid { grid-template-columns: 560px 1fr 1fr; }
.def .box h3 { letter-spacing: .14em; font-size: 18px; white-space: nowrap; }
.split .pic { height: 630px; }
.design table { margin-top: 22px; }
.design th { padding: 0 18px 12px; }
.design td { padding: 9px 18px; }
.design td.d { width: 360px; font-size: 22.5px; }
.design td.q { font-size: 22.5px; }
.design td.n { width: 64px; font-size: 21px; }
.explore svg.fig#figLive { display: block; height: 470px; width: auto; max-width: 100%; margin: 0 auto; }
.explore .stagefig { padding: 16px 24px 0; }
.explore .ctrl { padding: 10px 30px 22px; }
.explore .alg { margin-top: 20px; }
.explore .alg > div { padding: 16px 20px; }
.coins .pic { height: 519px; }
.coins .pic img { object-fit: contain; background: #fff; }
.sols th .coin { display: block; margin: 0 auto 6px; }
.sols td { padding: 5.6px 8px; }
.proof .viz .rowa { grid-template-columns: 84px 1fr 40px; }
.proof .viz .rowa .dots i { width: 27px; height: 27px; font-size: 12px; line-height: 27px; }
.proof .viz .rowa .dots { gap: 5px; }
.refs .ref a { word-break: normal; overflow-wrap: anywhere; }
.trio .title { margin-top: 18px; }