/* El cuaderno de cuadros de las clases del curso (clase.html de cada módulo): mismas fuentes y tokens.
   Ámbar = lo que se destaca (positivo, el modelo de la lección), azul verdoso = el contraste (negativo, la alternativa). */
:root {
  --bg: #F2F4F5; --paper: #FFFFFF; --ink: #15202A; --muted: #56636F; --line: #D2D9DF; --grid: #E5E9EC;
  --c1: #A85600; --c1-soft: #FBE8D2; --c0: #00708C; --c0-soft: #D4ECF2;
  --ok: #1C774A; --err: #B0261D; --code: #E9EDF0;
  --f-display: "Familjen Grotesk", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1317; --paper: #161C22; --ink: #E1E6EA; --muted: #9AA6B1; --line: #2A333C; --grid: #171D23;
    --c1: #F0A54C; --c1-soft: #3A2914; --c0: #5DC5E0; --c0-soft: #11343F;
    --ok: #5BC98D; --err: #F2897F; --code: #0B0F12; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1317; --paper: #161C22; --ink: #E1E6EA; --muted: #9AA6B1; --line: #2A333C; --grid: #171D23;
  --c1: #F0A54C; --c1-soft: #3A2914; --c0: #5DC5E0; --c0-soft: #11343F;
  --ok: #5BC98D; --err: #F2897F; --code: #0B0F12; color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--bg); color: var(--ink);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  font: 400 1.0625rem/1.65 var(--f-body);
}
a { color: var(--c0); }
:focus-visible { outline: 2px solid var(--c0); outline-offset: 2px; }

/* Ruta: los capítulos, arriba de cada página */
.ruta { border-bottom: 1px solid var(--line); background: var(--paper); }
.ruta ol { list-style: none; margin: 0 auto; padding: 10px 16px; max-width: 1200px; display: flex; flex-wrap: wrap; gap: 4px 6px; }
.ruta a { display: flex; gap: 8px; align-items: baseline; padding: 6px 10px; border-radius: 6px; color: var(--ink); text-decoration: none; font: 500 .9rem/1.3 var(--f-display); }
.ruta a span { font: 600 .74rem var(--f-mono); color: var(--muted); }
.ruta a:hover { background: var(--bg); }
.ruta a[aria-current="page"] { background: var(--ink); color: var(--paper); }
.ruta a[aria-current="page"] span { color: var(--paper); opacity: .7; }

.wrap { max-width: 1200px; margin: 0 auto; padding-inline: 16px; padding-block: 28px 96px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px; }
@media (min-width: 960px) { .wrap { grid-template-columns: 200px minmax(0, 1fr); gap: 56px; padding-inline: 32px; } }

.toc-k, .eyebrow, .k { font: 600 .72rem/1.2 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.toc ol { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 2px; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
@media (min-width: 960px) {
  .toc { position: sticky; top: 28px; align-self: start; }
  .toc ol { grid-template-columns: 1fr; }
}
.toc a { display: flex; gap: 10px; padding: 6px 8px; border-radius: 6px; color: var(--ink); text-decoration: none; font: 500 .93rem/1.3 var(--f-display); }
.toc a:hover { background: var(--paper); }
.toc a span { font: 600 .78rem/1.65 var(--f-mono); color: var(--muted); min-width: 1.1em; }

main { min-width: 0; }
h1 { font: 700 clamp(2.3rem, 6vw, 3.5rem)/1.02 var(--f-display); letter-spacing: -.02em; margin: .25em 0 .4em; text-wrap: balance; }
h2 { font: 700 clamp(1.6rem, 3.4vw, 2.1rem)/1.1 var(--f-display); letter-spacing: -.01em; margin: 0; text-wrap: balance; }
h3 { font: 600 1.22rem/1.25 var(--f-display); margin: 2.2em 0 .5em; text-wrap: balance; }
h4 { font: 600 1.02rem/1.3 var(--f-display); margin: 0 0 .3em; }
p, li { max-width: 68ch; }
.lesson ul, .lesson ol { padding-left: 1.3em; }
.lesson li { margin: .35em 0; }
dfn { font-style: italic; font-weight: 600; }
var { font-style: italic; }
.t-c1 { color: var(--c1); } .t-c0 { color: var(--c0); }
.ok { color: var(--ok); } .bad { color: var(--err); }

code { font-family: var(--f-mono); font-size: .84em; background: var(--code); padding: .08em .32em; border-radius: 4px; overflow-wrap: anywhere; }
pre { font: 400 .83rem/1.6 var(--f-mono); background: var(--code); padding: 14px 16px; border-radius: 8px; overflow-x: auto; margin: 1.2em 0; max-width: 100%; }
pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }
pre .c { color: var(--muted); }

.lede { font-size: 1.17rem; line-height: 1.6; margin: 0; }
.howto { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin-top: 1.6em; }
.howto p { margin: 0 0 .4em; font-size: 1rem; }
.howto pre { margin: .6em 0 0; }

.lesson { padding-top: 76px; scroll-margin-top: 8px; }
.lhead { display: flex; gap: 16px; align-items: baseline; border-top: 2px solid var(--ink); padding-top: 16px; margin-bottom: 22px; }
.lnum { font: 700 2.4rem/1 var(--f-display); font-variant-numeric: tabular-nums; }
.file { font: 500 .8rem/1.4 var(--f-mono); color: var(--muted); margin: .45em 0 0; }

.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin: 1.6em 0; }
.panel > .k { margin: 0 0 14px; }
.panel p { font-size: 1rem; }
.note { border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; background: var(--paper); max-width: 68ch; margin: 1.5em 0; font-size: 1rem; }
.note .k { display: block; margin-bottom: 4px; }
.note.trap .k { color: var(--err); } .note.rule .k { color: var(--ok); } .note.paper .k { color: var(--c1); }
.note p { margin: .3em 0; }
.formula { font: italic 400 1.22rem/1.5 var(--f-body); margin: 1em 0; overflow-x: auto; }
.formula .op { font-style: normal; }

.tbl { overflow-x: auto; margin: 1.2em 0; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font: 600 .72rem/1.3 var(--f-mono); text-transform: uppercase; letter-spacing: .07em; color: var(--muted); }
td.n, th.n { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--f-mono); font-size: .86rem; }
td.m { font-family: var(--f-mono); font-size: .86rem; white-space: nowrap; }

.seg { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.seg-k { font: 600 .7rem/1 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); align-self: center; min-width: 6.5em; }
button { font: 500 .82rem/1.2 var(--f-mono); padding: 7px 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 6px; cursor: pointer; }
button:hover { border-color: var(--muted); }
button:disabled { opacity: .45; cursor: default; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
input[type="range"] { width: 100%; accent-color: var(--ink); }
input[type="number"] { font: 500 .9rem var(--f-mono); width: 5.5em; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); }
.rlabel { display: grid; gap: 6px; font: 600 .72rem/1.2 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.rlabel b { font-size: .95rem; color: var(--ink); letter-spacing: 0; text-transform: none; }
.sliders { display: grid; gap: 14px 20px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin-bottom: 14px; }

.two { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .two { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; } }
.two > * { min-width: 0; }
svg.plot, svg.diag { width: 100%; height: auto; display: block; }
.ax { stroke: var(--muted); stroke-width: 1; }
.gl { stroke: var(--grid); stroke-width: 1; }
.tick { fill: var(--muted); font: 500 11px var(--f-mono); }
.lab { fill: var(--ink); font: 600 12px var(--f-mono); }
.readout { font: 500 .86rem/1.85 var(--f-mono); font-variant-numeric: tabular-nums; overflow-x: auto; }
.readout b { font-weight: 600; }
.cap { font: 500 .78rem/1.4 var(--f-mono); color: var(--muted); margin-top: 8px; }

/* Diagramas SVG: cajas, flechas y rótulos que siguen el tema */
.d-box { fill: var(--paper); stroke: var(--line); stroke-width: 1.5; }
.d-box.c1 { fill: var(--c1-soft); stroke: var(--c1); }
.d-box.c0 { fill: var(--c0-soft); stroke: var(--c0); }
.d-t { fill: var(--ink); font: 600 13px var(--f-mono); }
.d-s { fill: var(--muted); font: 500 11px var(--f-mono); }
.d-a { stroke: var(--ink); stroke-width: 1.5; fill: none; }
.d-a.c1 { stroke: var(--c1); } .d-a.c0 { stroke: var(--c0); }
.d-head { fill: var(--ink); } .d-head.c1 { fill: var(--c1); } .d-head.c0 { fill: var(--c0); }

/* El autómata: una placa blanca con píxeles grandes */
canvas.placa { display: block; width: 100%; max-width: 432px; aspect-ratio: 1; image-rendering: pixelated; border: 1px solid var(--line); border-radius: 8px; background: #fff; touch-action: none; }
canvas.placa.pincel { cursor: crosshair; }
img.pix { image-rendering: pixelated; display: block; width: 100%; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.lab-grid { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 820px) { .lab-grid { grid-template-columns: minmax(0, 432px) minmax(0, 1fr); align-items: start; } }
.lab-grid > * { min-width: 0; }
.canales { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(82px, 1fr)); }
.canales figure { margin: 0; }
.canales canvas { width: 100%; aspect-ratio: 1; image-rendering: pixelated; border: 1px solid var(--line); border-radius: 4px; display: block; }
.canales figcaption { font: 500 .72rem/1.3 var(--f-mono); color: var(--muted); margin-top: 4px; }
.mini-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.mini-grid figure { margin: 0; }
.mini-grid figcaption { font: 500 .76rem/1.35 var(--f-mono); color: var(--muted); margin-top: 6px; }
.mini-grid canvas { display: block; width: 100%; aspect-ratio: 1; image-rendering: pixelated; border: 1px solid var(--line); border-radius: 6px; background: #fff; }

/* Tiras de barras pequeñas: estado, percepción, ocultas, cambio */
.tira { display: flex; gap: 1px; align-items: stretch; height: 34px; margin: 4px 0 2px; }
.tira i { flex: 1 1 0; min-width: 0; border-radius: 1px; }
.tira-k { display: flex; justify-content: space-between; font: 500 .7rem/1.3 var(--f-mono); color: var(--muted); }

/* Capítulos: tarjetas de la ruta de lectura */
.capitulos { list-style: none; padding: 0; margin: 24px 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.capitulos li { max-width: none; margin: 0; }
.capitulos a { display: block; height: 100%; background: var(--paper); border: 1px solid var(--line); border-top: 3px solid var(--ink); border-radius: 8px; padding: 14px 16px; color: var(--ink); text-decoration: none; }
.capitulos a:hover { border-color: var(--muted); }
.capitulos b { display: block; font: 700 1.05rem/1.3 var(--f-display); margin: 2px 0 6px; }
.capitulos span { font: 600 .72rem var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--c1); }
.capitulos p { margin: 0; font-size: .95rem; line-height: 1.5; }

/* Decisiones: qué, alternativas, por qué */
.decision { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin: 14px 0; }
.decision h4 { font-size: 1.08rem; margin-bottom: 8px; }
.decision dl { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px 16px; margin: 0; font-size: 1rem; }
@media (min-width: 720px) { .decision dl { grid-template-columns: 9.5em minmax(0, 1fr); } }
.decision dt { font: 600 .72rem/1.9 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.decision dd { margin: 0 0 6px; max-width: 68ch; }

details { border: 1px solid var(--line); border-radius: 8px; background: var(--paper); padding: 12px 16px; margin: 10px 0; max-width: 78ch; }
summary { cursor: pointer; font-size: 1rem; }
details[open] summary { margin-bottom: 8px; }
details p { margin: .3em 0; font-size: 1rem; }

.sigue { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 64px; padding-top: 16px; border-top: 2px solid var(--ink); }
.sigue a { font: 600 1rem/1.3 var(--f-display); text-decoration: none; }
.sigue a span { display: block; font: 600 .7rem var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }