@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:500;font-display:swap;src:url("../vendor/fuentes/barlow-condensed-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:600;font-display:swap;src:url("../vendor/fuentes/barlow-condensed-latin-600-normal.woff2") format("woff2")}
@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:700;font-display:swap;src:url("../vendor/fuentes/barlow-condensed-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"Barlow Condensed";font-style:normal;font-weight:800;font-display:swap;src:url("../vendor/fuentes/barlow-condensed-latin-800-normal.woff2") format("woff2")}
@font-face{font-family:"Karla";font-style:normal;font-weight:400;font-display:swap;src:url("../vendor/fuentes/karla-latin-variable-normal.woff2") format("woff2")}
@font-face{font-family:"Karla";font-style:normal;font-weight:500;font-display:swap;src:url("../vendor/fuentes/karla-latin-variable-normal.woff2") format("woff2")}
@font-face{font-family:"Karla";font-style:normal;font-weight:600;font-display:swap;src:url("../vendor/fuentes/karla-latin-variable-normal.woff2") format("woff2")}
@font-face{font-family:"Karla";font-style:normal;font-weight:700;font-display:swap;src:url("../vendor/fuentes/karla-latin-variable-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url("../vendor/fuentes/ibm-plex-mono-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url("../vendor/fuentes/ibm-plex-mono-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:600;font-display:swap;src:url("../vendor/fuentes/ibm-plex-mono-latin-600-normal.woff2") format("woff2")}

:root {
  --p-void: #181818;
  --p-olive: #282b29;
  --p-light: #f7f7f9;
  --p-white: #fefefe;
  --p-red: #ff1841;
  --p-mint: #b8e0d8;
  --p-lime: #c1f100;
  --paper: var(--p-void);
  --surface: #202020;
  --ink: var(--p-white);
  --muted: var(--p-mint);
  --line: rgb(254 254 254 / .18);
  --accent: var(--p-red);
  --signal: var(--p-lime);
  --on-accent: var(--p-void);
  --eco: var(--p-mint);
  --his: var(--p-red);
  --fil: var(--p-lime);
  --ing: var(--p-white);
  --ok-soft: color-mix(in srgb, var(--p-mint) 17%, var(--surface));
  --bad-soft: color-mix(in srgb, var(--p-red) 15%, var(--surface));
  --gold-soft: color-mix(in srgb, var(--p-red) 12%, var(--surface));
  --ui: "Karla", "Helvetica Neue", Arial, sans-serif;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
  color-scheme: dark;
}

body.bg-void {
  --paper: var(--p-void);
  --surface: #202020;
  --ink: var(--p-white);
  --muted: var(--p-mint);
  --line: rgb(254 254 254 / .18);
  --eco: var(--p-mint);
  --his: var(--p-red);
  --fil: var(--p-lime);
  --ing: var(--p-white);
  color-scheme: dark;
}
body.bg-olive {
  --paper: var(--p-olive);
  --surface: #313532;
  --ink: var(--p-white);
  --muted: var(--p-mint);
  --line: rgb(184 224 216 / .24);
  --accent: #ff5c73;
  --eco: var(--p-mint);
  --his: #ff5c73;
  --fil: var(--p-lime);
  --ing: var(--p-white);
  color-scheme: dark;
}
body.bg-light {
  --paper: var(--p-light);
  --surface: var(--p-white);
  --ink: var(--p-void);
  --muted: #46534f;
  --line: rgb(24 24 24 / .18);
  --accent: #c91236;
  --on-accent: var(--p-white);
  --signal: #687600;
  --eco: #28655b;
  --his: #c91236;
  --fil: #687600;
  --ing: var(--p-void);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  min-width: 0;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ui);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 1.25s ease, color 1.25s ease;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3E%3Cpath d='M0 1.5h8' stroke='%23fefefe' stroke-width='.6'/%3E%3C/svg%3E");
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
button:disabled { cursor: not-allowed; }
a { color: inherit; text-decoration-color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 5px; }
a:hover { color: var(--accent); }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.05; text-wrap: balance; }
[hidden] { display: none !important; }
::selection { background: var(--accent); color: var(--on-accent); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; }
body.bg-light :focus-visible { outline-color: var(--accent); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #171717; }
::-webkit-scrollbar-thumb { background: #545454; border: 2px solid #171717; }
::-webkit-scrollbar-thumb:hover { background: var(--p-red); }
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 120;
  padding: 12px 16px;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--mono);
  font-size: 12px;
  transform: translateY(-180%);
  transition: transform 160ms ease-out;
}
.skip-link:focus { transform: translateY(0); }
.noscript { margin: 32px; padding: 16px; border: 1px solid var(--accent); font-family: var(--mono); }

/* Cabecera / navegación de nodos. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px calc(12px + env(safe-area-inset-top, 0px));
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  transition: background-color 1.25s ease, border-color 1.25s ease;
}
.site-header::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: -1px;
  width: 54px;
  height: 3px;
  background: var(--accent);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
}
.brand-mark {
  position: relative;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--display);
  font-size: 28px;
  font-weight: 800;
  clip-path: polygon(0 0, 78% 0, 100% 22%, 100% 100%, 22% 100%, 0 78%);
}
.brand strong { display: block; font-family: var(--mono); font-size: 15px; letter-spacing: .12em; line-height: 1.2; }
.brand small { display: none; color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: .04em; }
.edition { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.edition span { display: none; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; letter-spacing: .12em; }
.edition span::before { content: ""; width: 6px; height: 6px; background: var(--signal); box-shadow: 0 0 0 2px color-mix(in srgb, var(--signal) 18%, transparent); }
.edition strong { font-size: 14px; font-weight: 500; }
.main-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 12px env(safe-area-inset-bottom, 0px);
  background: var(--paper);
  border-top: 1px solid var(--line);
  transition: background-color 1.25s ease, border-color 1.25s ease;
}
.main-nav button {
  position: relative;
  min-height: 60px;
  padding: 10px 8px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color 160ms ease-out, background-color 160ms ease-out;
}
.main-nav button::before { content: ""; position: absolute; top: -1px; left: 22%; right: 22%; height: 3px; background: transparent; }
.main-nav button[aria-current="page"] { color: var(--ink); }
.main-nav button[aria-current="page"]::before { background: var(--accent); }
.main-nav button:hover { background: var(--surface); color: var(--accent); }

#app { min-height: calc(100dvh - 72px); padding-bottom: 100px; }
.page-shell { width: min(100%, 1480px); margin: 0 auto; padding: 28px 20px 72px; }
.eyebrow {
  margin-bottom: 16px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.muted { color: var(--muted); }
.small { font-size: 12px; }
.serif { font-family: var(--display); }
.tabular { font-variant-numeric: tabular-nums; }
[data-scramble] { min-height: 1.4em; }

/* Portada: tipografía brutalista + cel anime + retícula asimétrica. */
.route-layout { display: flex; flex-direction: column; gap: 48px; }
.home-main { position: relative; min-width: 0; }
.hero {
  position: relative;
  isolation: isolate;
  min-height: calc(100dvh - 100px);
  padding: 40px 0 32px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: .12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cg fill='none' stroke='%23b8e0d8' stroke-width='.6'%3E%3Cpath d='M0 30h40V0M80 0v40h40M0 90h30v30M90 90h30M60 45v30M45 60h30'/%3E%3Ccircle cx='60' cy='60' r='3'/%3E%3C/g%3E%3C/svg%3E");
}
.hero-year {
  position: absolute;
  z-index: -1;
  right: -12px;
  top: -60px;
  color: var(--ink);
  opacity: .045;
  font-family: var(--display);
  font-size: clamp(240px, 60vw, 480px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.08em;
  pointer-events: none;
  user-select: none;
}
.hero-copy { position: relative; z-index: 2; min-width: 0; }
.hero h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-family: var(--display);
  font-size: clamp(60px, 17vw, 100px);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: .82;
  text-transform: uppercase;
}
.hero h1 em { display: block; color: var(--accent); font-style: normal; }
.hero-code { margin-bottom: 20px; color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: .05em; }
.hero-intro { max-width: 580px; margin-bottom: 0; font-size: 18px; line-height: 1.55; }
.hero-actions { display: flex; flex-direction: column; align-items: stretch; gap: 12px; margin-top: 28px; }
.hero-coordinate { display: none; }
.operative {
  position: relative;
  z-index: 1;
  height: 500px;
  margin: 32px 0 0;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}
.operative img { position: relative; z-index: 1; width: auto; height: 100%; object-fit: contain; object-position: center bottom; }
.operative-sigil {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(86vw, 380px);
  transform: translate(-50%, -50%);
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  opacity: .26;
}
.operative figcaption {
  position: absolute;
  z-index: 2;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-top: 1px solid var(--accent);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
}
.operative figcaption span:last-child { color: var(--signal); }

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 13px 20px;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .035em;
  text-decoration: none;
  text-transform: uppercase;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: transform 140ms ease-out, background-color 160ms ease-out, color 160ms ease-out;
}
.button:hover { transform: translate(-2px, -2px); }
.button:active { transform: translate(0); }
.button.secondary { background: transparent; color: var(--ink); border-color: var(--line); }
.button.secondary:hover { border-color: var(--accent); background: var(--surface); color: var(--accent); }
.button.gold { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.button.gold:hover { background: var(--p-white); color: var(--p-void); border-color: var(--p-white); }
.button.danger { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.button:disabled { opacity: .38; transform: none; }
.text-button {
  min-height: 44px;
  padding: 8px 0;
  border: 0;
  border-bottom: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.text-button:hover { color: var(--ink); border-color: var(--ink); }
.link-arrow::after { content: " ↗"; font-size: .9em; }

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 0 40px;
  border-bottom: 1px solid var(--line);
}
.metric { min-width: 0; padding: 20px 8px; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric strong { display: block; font-family: var(--display); font-size: clamp(34px, 8vw, 52px); font-weight: 600; line-height: 1; font-variant-numeric: tabular-nums; }
.metric span { display: block; margin-top: 8px; color: var(--muted); font-family: var(--mono); font-size: 12px; line-height: 1.5; text-transform: uppercase; }
.continue-block { margin: 48px 0; }
.continue-block h2 { max-width: 760px; margin-bottom: 16px; font-family: var(--display); font-size: clamp(42px, 10vw, 66px); font-weight: 700; letter-spacing: -.02em; text-transform: uppercase; }
.continue-block > p:not(.eyebrow) { max-width: 680px; color: var(--muted); }
.unit-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 20px 0 28px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.lens-strip { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.lens-cell { padding: 16px 8px 16px 0; border-bottom: 1px solid var(--line); }
.lens-cell strong { display: block; margin-bottom: 4px; font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; }
.lens-cell span { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
.lens-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; background: var(--lens); transform: rotate(45deg); }
.route-aside { min-width: 0; order: 2; }
.route-aside-header { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 12px; }
.route-aside h2 { margin: 0; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.route-list { border-top: 1px solid var(--line); }
.route-item {
  width: 100%;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  min-height: 78px;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  transition: background-color 160ms ease-out, transform 160ms ease-out;
}
.route-item:hover { background: var(--surface); transform: translateX(4px); }
.route-number {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  clip-path: polygon(0 0, 75% 0, 100% 25%, 100% 100%, 25% 100%, 0 75%);
}
.route-item.current .route-number { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.route-item.read .route-number { background: var(--muted); border-color: var(--muted); color: var(--p-void); }
.route-copy { min-width: 0; }
.route-copy small { display: block; margin-bottom: 3px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.route-copy strong { display: block; font-family: var(--display); font-size: 21px; font-weight: 600; line-height: 1.05; text-transform: uppercase; }
.route-progress { grid-column: 2; height: 2px; background: var(--line); }
.route-progress span { display: block; height: 100%; background: var(--accent); }
.home-note { max-width: 760px; margin: 40px 0 0; padding: 28px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--line); }
.home-note p { margin: 0; font-size: 19px; line-height: 1.55; }
.home-note strong { color: var(--accent); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }

/* Consola de práctica y telemetría. */
.page-heading { max-width: 980px; margin-bottom: 48px; }
.page-heading h1 { margin-bottom: 20px; font-family: var(--display); font-size: clamp(54px, 13vw, 88px); font-weight: 800; letter-spacing: -.03em; line-height: .86; text-transform: uppercase; }
.page-heading > p:last-child { max-width: 700px; margin-bottom: 0; font-size: 19px; }
.practice-grid { display: grid; gap: 48px; }
.practice-panel { border-top: 3px solid var(--accent); padding-top: 24px; }
.practice-panel h2 { margin-bottom: 8px; font-family: var(--display); font-size: 38px; font-weight: 700; text-transform: uppercase; }
.practice-panel > p { max-width: 620px; color: var(--muted); }
.field { display: grid; gap: 8px; margin: 20px 0; }
.field label, .field-label { font-family: var(--mono); font-size: 12px; font-weight: 500; letter-spacing: .04em; text-transform: uppercase; }
.field select, .field input {
  width: 100%;
  min-height: 50px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
}
.field select:hover, .field input:hover { border-color: var(--accent); }
.practice-start { width: 100%; margin-top: 8px; }
.diagnostic-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); }
.diagnostic-row .muted { font-family: var(--mono); font-size: 12px; }
.progress-section h2 { margin-bottom: 16px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.mastery-list { border-top: 1px solid var(--line); }
.mastery-row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.mastery-row strong { font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; }
.mastery-row small { color: var(--muted); font-family: var(--mono); font-size: 12px; font-variant-numeric: tabular-nums; }
.mastery-row .line-bar { grid-column: 1 / -1; grid-row: 2; }
.line-bar { height: 4px; overflow: hidden; background: var(--line); }
.line-bar span { display: block; height: 100%; background: var(--lens, var(--accent)); transition: width 240ms ease-out; }
.calibration-box { margin-top: 32px; padding: 24px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--line); }
.calibration-box strong { display: block; font-family: var(--display); font-size: 34px; font-weight: 600; text-transform: uppercase; }
.calibration-box p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.unit-progress-table { margin-top: 48px; }
.unit-progress-table details { border-top: 1px solid var(--line); }
.unit-progress-table details:last-child { border-bottom: 1px solid var(--line); }
.unit-progress-table summary { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; }
.unit-progress-table summary::marker { color: var(--accent); }
.unit-progress-content { padding: 0 0 20px; }
.unit-progress-content .line-bar { margin: 8px 0; }
.unit-progress-content p { margin-bottom: 8px; color: var(--muted); font-family: var(--mono); font-size: 12px; }
.unit-progress-content .text-button { margin-right: 20px; }

/* Protocolo / método. */
.method-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 48px; }
.method-layout > * { min-width: 0; }
.method-principle { max-width: 800px; margin-bottom: 40px; padding: 24px 0 24px 20px; border-left: 3px solid var(--accent); }
.method-principle p { margin: 0; font-family: var(--display); font-size: 31px; font-weight: 500; line-height: 1.15; text-transform: uppercase; }
.evidence-list { border-top: 1px solid var(--line); }
.evidence-item { border-bottom: 1px solid var(--line); }
.evidence-item summary { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; font-family: var(--display); font-size: 25px; font-weight: 600; text-transform: uppercase; }
.evidence-item summary::marker { color: var(--accent); }
.evidence-body { max-width: 740px; padding: 0 0 24px; }
.evidence-body p { font-size: 17px; line-height: 1.6; }
.evidence-body .app-use { padding: 14px 16px; background: var(--gold-soft); border-left: 1px solid var(--accent); font-size: 14px; }
.evidence-body cite { display: block; margin-top: 12px; color: var(--muted); font-family: var(--mono); font-size: 12px; font-style: normal; }
.settings { border-top: 3px solid var(--accent); padding-top: 24px; }
.settings h2 { margin-bottom: 8px; font-family: var(--display); font-size: 36px; font-weight: 700; text-transform: uppercase; }
.settings-note { color: var(--muted); font-size: 14px; }
.settings-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.data-note { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 12px; }

/* Capa de lectura: HUD sobrio para no competir con el contenido. */
.study {
  --paper: #181818;
  --surface: #202020;
  --ink: #fefefe;
  --muted: #b8e0d8;
  --line: rgb(254 254 254 / .18);
  --eco: #b8e0d8;
  --his: #ff1841;
  --fil: #c1f100;
  --ing: #fefefe;
  --ok-soft: color-mix(in srgb, #b8e0d8 17%, #202020);
  --bad-soft: color-mix(in srgb, #ff1841 15%, #202020);
  --gold-soft: color-mix(in srgb, #ff1841 12%, #202020);
  position: fixed;
  inset: 0;
  z-index: 60;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--paper);
  color: var(--ink);
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.study-header {
  position: sticky;
  top: 0;
  z-index: 5;
  min-height: 64px;
  display: grid;
  grid-template-columns: auto minmax(60px, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 8px 20px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.study-progress { height: 3px; overflow: hidden; background: var(--line); }
.study-progress span { display: block; width: 0; height: 100%; background: var(--accent); transition: width 220ms ease-out; }
.study-status { min-width: 64px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }
.study-content { width: min(100%, 1220px); margin: 0 auto; padding: 28px 20px 72px; }
.lesson-layout { display: grid; gap: 32px; }
.lesson-rail { min-width: 0; }
.lesson-rail .unit-kicker { display: block; color: var(--accent); font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.lesson-rail .big-number { display: block; margin: 8px 0; color: transparent; font-family: var(--display); font-size: 96px; font-weight: 800; line-height: .9; letter-spacing: -.04em; -webkit-text-stroke: 1px var(--accent); }
.lesson-rail p { max-width: 180px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.lesson-article { min-width: 0; max-width: 800px; }
.lesson-article > header { margin-bottom: 40px; }
.lesson-article h1 { margin-bottom: 20px; font-family: var(--display); font-size: clamp(52px, 12vw, 78px); font-weight: 800; letter-spacing: -.025em; line-height: .88; text-transform: uppercase; }
.lesson-question { max-width: 720px; margin-bottom: 16px; font-size: 22px; font-weight: 600; line-height: 1.35; }
.lesson-intro { max-width: 700px; color: var(--muted); font-size: 18px; }
.lesson-section { display: grid; gap: 8px; padding: 30px 0; border-top: 1px solid var(--line); }
.lesson-section .lens-label { color: var(--lens); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.lesson-section h2 { margin: 0; font-family: var(--display); font-size: 36px; font-weight: 600; text-transform: uppercase; }
.lesson-section .section-label { color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.lesson-section p { max-width: 700px; margin: 10px 0 0; font-size: 19px; line-height: 1.65; }
.counterpoint { margin: 16px 0 32px; padding: 28px; background: var(--surface); border: 1px solid var(--accent); clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%); }
.counterpoint h2 { margin-bottom: 12px; color: var(--accent); font-family: var(--display); font-size: 32px; font-weight: 700; text-transform: uppercase; }
.counterpoint p { max-width: 680px; margin: 0; font-size: 18px; line-height: 1.55; }
.connection-box { max-width: 740px; margin: 32px 0; padding: 22px; background: var(--signal); color: var(--p-void); clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%); }
.connection-box h2 { margin-bottom: 8px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.connection-box p { margin: 0; font-size: 19px; font-weight: 600; }
.source-list { margin: 32px 0; }
.source-list h2 { margin-bottom: 12px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.source-list ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.source-list li { display: flex; flex-direction: column; gap: 2px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.source-list a { color: var(--muted); font-family: var(--mono); font-size: 12px; font-weight: 500; }
.source-list small { color: var(--muted); font-size: 12px; }
.lesson-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 32px; }

/* Preguntas: alto contraste, respuesta directa y jerarquía de consola. */
.quiz-shell { max-width: 920px; margin: 0 auto; }
.quiz-context { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-bottom: 26px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.quiz-context .lens-name { color: var(--lens); font-weight: 600; letter-spacing: .08em; }
.quiz-question { max-width: 860px; margin-bottom: 30px; font-family: var(--display); font-size: clamp(36px, 8vw, 50px); font-weight: 600; line-height: 1.02; }
.options { display: grid; gap: 12px; }
.option {
  width: 100%;
  min-height: 62px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--surface);
  text-align: left;
  font-size: 18px;
  line-height: 1.35;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: border-color 140ms ease-out, background-color 140ms ease-out, transform 140ms ease-out;
}
.option:hover:not(:disabled) { border-color: var(--accent); transform: translateX(3px); }
.option:active:not(:disabled) { transform: translateX(0); }
.option-letter { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 12px; }
.option.selected { border-color: var(--accent); background: var(--gold-soft); }
.option.selected .option-letter { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.option.correct { border-color: var(--eco); background: var(--ok-soft); }
.option.correct .option-letter { background: var(--eco); border-color: var(--eco); color: var(--p-void); }
.option.incorrect { border-color: var(--his); background: var(--bad-soft); }
.option.incorrect .option-letter { background: var(--his); border-color: var(--his); color: var(--on-accent); }
.option:disabled { opacity: 1; color: var(--ink); }
.confidence { margin: 30px 0 20px; padding: 16px; border: 1px solid var(--line); }
.confidence legend { padding: 0 8px; font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; }
.confidence-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.confidence-options button { min-height: 48px; padding: 8px; border: 1px solid var(--line); border-radius: 0; background: transparent; font-family: var(--mono); font-size: 12px; text-transform: uppercase; transition: background-color 140ms ease-out, border-color 140ms ease-out; }
.confidence-options button:hover { border-color: var(--accent); }
.confidence-options button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.quiz-submit { width: 100%; }
.feedback { margin-top: 30px; padding-top: 24px; border-top: 3px solid var(--eco); }
.feedback.wrong { border-color: var(--his); }
.feedback h2 { margin-bottom: 12px; font-family: var(--display); font-size: 34px; font-weight: 700; line-height: 1.05; text-transform: uppercase; }
.feedback p { max-width: 780px; font-size: 18px; line-height: 1.55; }
.feedback .calibration-note { padding: 13px 16px; background: var(--gold-soft); border-left: 1px solid var(--accent); font-family: var(--mono); font-size: 12px; }
.option-review { margin: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.option-review summary { min-height: 54px; display: flex; align-items: center; cursor: pointer; font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; }
.option-review summary::marker { color: var(--accent); }
.option-review ul { margin: 0; padding: 0; list-style: none; }
.option-review li { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 12px; padding: 14px 0; border-top: 1px solid var(--line); }
.option-review li strong { color: var(--accent); font-family: var(--mono); font-size: 12px; }
.option-review li p { margin: 0; font-size: 14px; }
.next-question { width: 100%; margin-top: 8px; }
.quiz-footnote { margin-top: 16px; color: var(--muted); font-family: var(--mono); font-size: 12px; text-align: center; text-transform: uppercase; }
.summary { max-width: 820px; margin: 24px auto; }
.summary h1 { margin-bottom: 20px; font-family: var(--display); font-size: clamp(56px, 13vw, 88px); font-weight: 800; letter-spacing: -.03em; line-height: .86; text-transform: uppercase; }
.summary-lead { max-width: 680px; font-size: 19px; }
.summary-metrics { margin: 32px 0; }
.summary-actions { display: flex; flex-direction: column; gap: 12px; }
.review-missed { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--accent); }
.review-missed h2 { font-family: var(--display); font-size: 32px; font-weight: 700; text-transform: uppercase; }
.review-missed ul { padding-left: 20px; }
.review-missed li { margin-bottom: 12px; font-size: 17px; }
.review-missed li::marker { color: var(--accent); }

/* Diálogos y avisos. */
.confirm-dialog {
  width: min(calc(100% - 40px), 500px);
  padding: 28px;
  border: 1px solid var(--accent);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: none;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}
.confirm-dialog::backdrop { background: rgb(24 24 24 / .78); }
.confirm-dialog h2 { margin-bottom: 12px; font-family: var(--display); font-size: 40px; font-weight: 700; text-transform: uppercase; }
.confirm-dialog p { font-size: 17px; }
.dialog-actions { display: flex; flex-direction: column-reverse; gap: 12px; margin-top: 24px; }
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(76px + env(safe-area-inset-bottom, 0px));
  z-index: 90;
  width: max-content;
  max-width: calc(100% - 32px);
  transform: translateX(-50%);
  padding: 12px 18px;
  border: 1px solid var(--accent);
  background: var(--p-void);
  color: var(--p-white);
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
}

/* Sistema visual: escenas, guía, iconografía y hilo de recorrido. */
.unit-svg { overflow: visible; }
.unit-svg .accent { stroke: var(--accent); }
.route-list { position: relative; }
.route-thread {
  position: absolute;
  z-index: 0;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 4px;
  height: 100%;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2px;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  opacity: .55;
  pointer-events: none;
}
.route-item { position: relative; z-index: 1; grid-template-columns: 32px 40px minmax(0, 1fr); gap: 10px; }
.route-number { background: var(--paper); }
.route-glyph { width: 40px; height: 34px; display: grid; place-items: center; color: var(--muted); transition: color 150ms ease-out, transform 150ms ease-out; }
.route-glyph .unit-svg { width: 40px; height: 30px; }
.route-item:hover .route-glyph { color: var(--accent); transform: rotate(-3deg) scale(1.08); }
.route-progress { grid-column: 3; }
.lens-icon { width: 28px; height: 28px; display: inline-grid; place-items: center; flex: none; }
.lens-svg { width: 24px; height: 24px; }
.lens-heading { display: flex; align-items: center; gap: 8px; color: var(--lens); }
.unit-scene {
  margin: 0 0 40px;
  padding: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.unit-scene .unit-svg { width: 100%; height: auto; max-height: 280px; color: var(--muted); }
.unit-scene figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; margin-top: 20px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--accent); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.lesson-rail { position: relative; }
.lesson-guide { position: absolute; right: 0; top: 0; width: 110px; height: 110px; object-fit: contain; border-bottom: 1px solid var(--accent); }
.practice-heading { max-width: 100%; }
.practice-operative { max-width: 520px; margin: 0 0 32px; border-bottom: 1px solid var(--accent); }
.practice-operative img { width: 100%; height: auto; max-height: 320px; object-fit: contain; object-position: center bottom; }
.practice-operative figcaption, .summary-operative figcaption { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; color: var(--muted); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.practice-operative figcaption span:last-child { color: var(--signal); }
.method-loop { margin: 0 0 40px; padding: 20px 0; overflow-x: auto; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--line); }
.method-loop-head { display: flex; justify-content: space-between; gap: 16px; color: var(--accent); font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.learning-loop { width: 100%; min-width: 540px; height: auto; margin: 16px 0; color: var(--muted); }
.learning-loop marker { color: var(--accent); }
.method-loop figcaption { color: var(--muted); font-family: var(--mono); font-size: 12px; }
.feedback-heading { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 18px; align-items: start; }
.feedback-guide { width: 88px; height: 88px; object-fit: contain; border: 1px solid var(--eco); background: var(--surface); clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%); }
.feedback.wrong .feedback-guide { border-color: var(--his); }
.feedback-heading p { margin-bottom: 0; }
.summary-operative { max-width: 500px; margin: 28px 0; border-bottom: 1px solid var(--accent); }
.summary-operative img { width: 100%; height: auto; max-height: 300px; object-fit: contain; object-position: center bottom; }

/* Capa de juego: archivos giratorios, reacciones, combos y partículas. */
.scene-flip { display: block; width: 100%; aspect-ratio: 4 / 3; padding: 0; border: 0; background: transparent; text-align: left; perspective: 1000px; }
.scene-inner { position: relative; display: block; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 650ms cubic-bezier(.2,.72,.2,1); }
.scene-flip.is-flipped .scene-inner { transform: rotateY(180deg); }
.scene-face { position: absolute; inset: 0; display: block; overflow: hidden; backface-visibility: hidden; background: var(--surface); }
.scene-front img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.08); will-change: transform; }
.scene-tag { position: absolute; left: 12px; bottom: 12px; padding: 6px 8px; border-left: 2px solid var(--accent); background: #181818; color: #b8e0d8; font-family: var(--mono); font-size: 12px; text-transform: uppercase; }
.scene-back { transform: rotateY(180deg); display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 12px; padding: 14px; color: var(--muted); }
.scene-back-visual .unit-svg { width: 100%; height: auto; max-height: 220px; }
.scene-back-copy { display: grid; gap: 10px; color: var(--ink); font-family: var(--display); font-size: 20px; font-weight: 600; line-height: 1.05; text-transform: uppercase; }
.scene-back-copy small { color: var(--accent); font-family: var(--mono); font-size: 12px; }
.scene-back-copy > span { color: var(--muted); font-family: var(--mono); font-size: 12px; line-height: 1.4; }
.image-failed .scene-inner { transform: none !important; }
.image-failed .scene-front { display: none; }
.image-failed .scene-back { transform: none; }
.confidence { position: relative; }
.confidence legend { padding-right: 64px; }
.confidence-reaction { position: absolute; right: 10px; top: -36px; width: 64px; height: 64px; object-fit: contain; border: 1px solid var(--line); background: var(--paper); clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%); }
.combo-display { min-height: 24px; display: flex; align-items: center; gap: 9px; margin: -10px 0 10px; color: var(--signal); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .04em; transform-origin: left center; }
.combo-display.active::before { content: ""; width: 24px; height: 7px; background: var(--signal); clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%); }
.fx-particle-layer { position: fixed; inset: 0; z-index: 100; pointer-events: none; }
.fx-particle-layer i { position: absolute; display: block; width: 8px; height: 8px; clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); }
.summary-operative.victory { max-width: 420px; margin-right: auto; margin-left: auto; text-align: center; }
.summary-operative.victory img { max-height: 340px; margin: 0 auto; }
.summary-operative.victory figcaption { justify-content: center; }

@media (min-width: 600px) {
  .brand small, .edition span { display: flex; }
  .hero-actions, .lesson-actions, .summary-actions { flex-direction: row; align-items: center; }
  .hero-actions .button, .lesson-actions .button, .summary-actions .button { width: auto; }
  .lens-strip { grid-template-columns: repeat(4, 1fr); }
  .lens-cell { padding-right: 16px; }
  .practice-start { width: auto; min-width: 250px; }
  .settings-actions { flex-direction: row; flex-wrap: wrap; }
  .dialog-actions { flex-direction: row; justify-content: flex-end; }
  .quiz-submit, .next-question { width: auto; min-width: 230px; }
  .mastery-row { grid-template-columns: minmax(120px, 1fr) minmax(120px, 1.6fr) auto; }
  .mastery-row .line-bar { grid-column: auto; grid-row: auto; }
}

@media (min-width: 768px) {
  .site-header { padding-left: 32px; padding-right: 32px; }
  .site-header::after { right: 32px; }
  .main-nav { position: static; display: flex; gap: 8px; padding: 0; background: transparent; border: 0; }
  .main-nav button { min-width: 88px; min-height: 44px; }
  .main-nav button::before { top: auto; bottom: -14px; left: 20%; right: 20%; }
  #app { padding-bottom: 0; }
  .page-shell { padding: 44px 32px 88px; }
  .practice-grid { grid-template-columns: minmax(0, 1.12fr) minmax(300px, .88fr); gap: 64px; }
  .method-layout { grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: 64px; }
  .settings { position: sticky; top: 104px; align-self: start; }
  .practice-heading { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: end; }
  .practice-operative { margin-bottom: 0; }
  .scene-flip { aspect-ratio: 3 / 2; }
  .scene-back { gap: 24px; padding: 24px; }
  .scene-back-copy { font-size: 26px; }
  .study-content { padding: 40px 32px 88px; }
  .lesson-layout { grid-template-columns: 160px minmax(0, 1fr); gap: 48px; }
  .lesson-rail { position: sticky; top: 104px; align-self: start; }
  .lesson-guide { position: static; width: 160px; height: 160px; margin-top: 24px; }
  .lesson-actions { justify-content: flex-start; }
  .toast { bottom: 24px; }
}

@media (min-width: 1024px) {
  .route-layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 64px; }
  .route-aside { order: 0; }
  .route-aside-inner { position: sticky; top: 104px; }
  .home-main { order: 2; }
  .hero { min-height: 730px; height: calc(100dvh - 104px); max-height: 980px; padding-top: 48px; }
  .hero-copy { width: 66%; padding-top: 24px; }
  .hero h1 { max-width: 880px; font-size: clamp(96px, 9.6vw, 154px); }
  .hero-intro { max-width: 530px; }
  .hero-code { font-size: 12px; }
  .hero-coordinate { position: absolute; right: 0; top: 48px; display: block; color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: .08em; writing-mode: vertical-rl; }
  .operative { position: absolute; right: -20px; bottom: 0; width: 43%; height: 91%; margin: 0; }
  .operative figcaption { right: 20px; }
  .operative-sigil { width: min(30vw, 420px); }
  .continue-block { margin-top: 48px; }
  .study-header { padding-left: 32px; padding-right: 32px; }
}

@media (min-width: 1400px) {
  .route-layout { gap: 80px; }
  .hero-copy { width: 68%; }
  .operative { right: -40px; width: 45%; }
  .operative figcaption { right: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .anime-scene-image { transform: none !important; }
  .fx-particle-layer { display: none !important; }
}

/* RED REACTOR · marca, entrada y expedición */
.rr-mark{display:inline-flex;align-items:center;justify-content:center;gap:0;font-family:var(--display);font-size:22px;line-height:1;letter-spacing:-.12em}
.rr-mark b{font-weight:800}
.rr-mark .rr-reverse{display:inline-block;transform:scaleX(-1);color:var(--signal);font-weight:800}
.rr-mark{animation:rrPulse 6s ease-in-out infinite}
@keyframes rrPulse{0%,100%{filter:drop-shadow(0 0 0 rgba(255,24,65,0))}50%{filter:drop-shadow(0 0 10px rgba(255,24,65,.35))}}
#scroll-meter{position:fixed;z-index:60;top:0;left:0;right:0;height:3px;background:rgba(127,127,127,.14);pointer-events:none}
#scroll-meter span{display:block;width:0;height:100%;background:var(--signal);transition:width .18s ease-out}
.beginner-welcome{border:1px solid var(--line);padding:22px;margin:22px 0;background:var(--paper)}
.beginner-welcome h2{font-family:var(--display);font-size:clamp(28px,4vw,46px);margin-bottom:10px}
.beginner-welcome p{max-width:70ch}
.beginner-block{padding:18px 20px;margin-bottom:24px;border-left:2px solid var(--accent);background:var(--gold-soft)}
.beginner-block h2{font-family:var(--display);font-size:clamp(24px,3vw,34px);margin-bottom:8px}
.beginner-basic{font-size:1.04rem;line-height:1.65;max-width:70ch}
.beginner-example{max-width:70ch;color:var(--muted)}
.beginner-terms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}
.beginner-terms details{border-top:1px dashed var(--line);padding-top:8px}
.beginner-terms summary{cursor:pointer;color:var(--accent);font-family:var(--mono);font-size:.78rem}
.beginner-terms p{color:var(--muted);font-size:.86rem;margin:7px 0 0}
.expedition{margin:28px 0;padding:22px;border:1px solid var(--line);background:var(--paper)}
.expedition-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:16px}
.expedition-grid button{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-align:left;transition:transform .18s ease,border-color .18s ease,background-color .18s ease}
.expedition-grid button:hover{border-color:var(--accent);transform:translateY(-2px)}
.expedition-grid span{font-family:var(--mono);color:var(--accent);font-size:.7rem}
.expedition-grid small{line-height:1.35}
.expedition-grid em{margin-top:auto;color:var(--muted);font-family:var(--mono);font-size:.62rem;font-style:normal;letter-spacing:.08em;text-transform:uppercase}
.expedition-grid button.completed{border-color:var(--signal);background:var(--ok-soft)}
.expedition-grid button.completed em{color:var(--signal)}
.source-challenge,.data-options{display:grid;gap:10px;margin:18px 0}
.source-option{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:14px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-align:left}
.source-option small{color:var(--muted);font-family:var(--mono);font-size:.68rem}
.source-option.correct,.chain-option.correct,.data-option.correct{border-color:var(--signal);background:var(--ok-soft)}
.source-option.incorrect,.chain-option.incorrect,.data-option.incorrect{border-color:var(--accent);background:var(--bad-soft)}
.chain-list{display:grid;gap:8px;padding:0;list-style:none;max-width:760px}
.chain-option{display:flex;align-items:center;gap:12px;width:100%;padding:11px 14px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-align:left}
.chain-option span{display:grid;place-items:center;min-width:28px;height:28px;border:1px solid var(--accent);color:var(--accent);font-family:var(--mono);font-size:.72rem}
.chain-option.selected{border-color:var(--signal);background:var(--gold-soft)}
.data-chart{display:grid;gap:12px;max-width:720px;margin:20px 0}
.data-disclaimer{max-width:720px;margin:-6px 0 20px;padding-left:12px;border-left:2px solid var(--accent);color:var(--muted);font-family:var(--mono);font-size:.72rem;line-height:1.55}
.data-row{display:grid;grid-template-columns:minmax(110px,1fr) 3fr 44px;align-items:center;gap:12px;font-family:var(--mono);font-size:.76rem}
.data-track{height:9px;background:var(--line);overflow:hidden}
.data-track i{display:block;height:100%;background:var(--signal);transition:width .5s ease-out}
.data-option{padding:13px 16px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-align:left}
#source-feedback,#chain-feedback,#data-feedback{min-height:24px}
[data-reveal]{opacity:0;transform:translate3d(0,18px,0);transition:opacity .55s ease-out,transform .55s ease-out}
[data-reveal].is-visible{opacity:1;transform:translate3d(0,0,0)}
[data-parallax]{will-change:transform;transform:translate3d(0,calc(var(--parallax-y,0)*1px),0);transition:transform .08s linear}
[data-tilt]{transform-style:preserve-3d;transition:transform .18s ease-out}
@media(max-width:900px){.expedition-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.beginner-terms{grid-template-columns:1fr}.data-row{grid-template-columns:95px 1fr 32px;font-size:.68rem}}
@media(max-width:560px){.expedition-grid{grid-template-columns:1fr}.beginner-welcome{padding:16px}.data-row{grid-template-columns:76px 1fr 26px;font-size:.62rem}}
@media(prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none}[data-parallax]{transform:none!important}.rr-mark{animation:none}}

/* Desafíos entre Camaradas */
.duel-cta{display:flex;align-items:center;justify-content:space-between;gap:28px;margin:28px 0;padding:24px;border:1px solid var(--accent);background:var(--paper)}
.duel-cta h2{max-width:760px;margin-bottom:10px;font-family:var(--display);font-size:clamp(28px,4vw,48px);line-height:1.05;text-transform:uppercase}
.duel-cta p:not(.eyebrow){max-width:680px;color:var(--muted)}
.duel-cta .button{flex:none;text-decoration:none}
@media(max-width:700px){.duel-cta{flex-direction:column;align-items:flex-start;padding:18px}.duel-cta .button{width:100%;justify-content:center}}

.home-note strong{color:#ff8a9b}

/* Logotipo idéntico a la portada principal */
.tr-home.logo{font-weight:700;font-size:1.05rem;white-space:nowrap;flex-shrink:0;color:inherit;text-decoration:none;cursor:pointer;display:inline-block}
.tr-home.logo::before{content:"▮";color:#E5233D;margin-right:8px}
.tr-home.logo:hover{color:#E5233D}
@media(max-width:700px){.tr-home.logo{font-size:.92rem}}

/* Inglés académico como extensión opcional de la ruta. */
.english-toggle{display:block;max-width:100%;margin:8px 0 16px;text-align:left;white-space:normal;line-height:1.5}
.setting-check{display:flex;align-items:flex-start;gap:12px;margin:24px 0;cursor:pointer}
.setting-check input{width:22px;height:22px;margin:2px 0 0;flex:none;accent-color:var(--accent)}
.setting-check span{display:grid;gap:6px}
.setting-check strong{font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.setting-check small{color:var(--muted);font-size:14px;line-height:1.55}
.setting-check:focus-within{outline:2px solid var(--accent);outline-offset:5px}