/* Mi mundo de Beakman: una columna tranquila sobre papel de cuaderno cuadriculado.
   El verde lima de la bata es el color de acento; el texto va en verde muy oscuro. */
:root {
  color-scheme: light;
  --lime: #A6D41E;        /* la bata */
  --lime-dark: #7FA80F;
  --lime-soft: #EEF6D6;
  --ink: #1F3A0B;         /* titulares, enlaces, texto sobre lima */
  --text: #1F2A17;
  --muted: #4E5A45;
  --paper: #FCFDF7;
  --card: #FFFFFF;
  --line: #DCE6C6;
  --grid: rgba(127, 168, 15, 0.10);
  --note: #FFF6D1;        /* pósit */
  --note-line: #E8D27A;
  --code: #F2F6E6;
  --display: "Fredoka", "Nunito", system-ui, sans-serif;
  --body: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "DejaVu Sans Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
body {
  margin: 0; color: var(--text); font: 17px/1.6 var(--body);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  overflow-wrap: break-word;
}
img { max-width: 100%; }
.wrap { max-width: 1000px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
h1, h2, h3 { font-family: var(--display); font-weight: 600; color: var(--ink); text-wrap: balance; margin: 0; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5.5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3.6vw, 2rem); }
h3 { font-size: 1.2rem; }
p, li { max-width: 66ch; }
p { margin: 0; }
a { color: var(--ink); text-decoration-color: var(--lime); text-underline-offset: 3px; text-decoration-thickness: 2px; }
a:hover { text-decoration-color: var(--lime-dark); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--lime-dark); outline-offset: 2px; border-radius: 6px; }
code { font-family: var(--mono); font-size: 0.88em; background: var(--code); padding: 0.1em 0.35em; border-radius: 4px; }
pre { font-family: var(--mono); font-size: 0.88rem; line-height: 1.5; background: #1F2A17; color: #F2F6E6;
  padding: 14px 16px; border-radius: 12px; overflow-x: auto; margin: 0; max-width: 100%; }
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

/* barra de arriba */
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font: 600 1.15rem var(--display); color: var(--ink); text-decoration: none; }
.brand img { width: 36px; height: 36px; }
.top nav { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.97rem; justify-content: flex-end; }
.top nav a { text-decoration: none; color: var(--muted); font-weight: 600; }
.top nav a:hover { color: var(--ink); }

/* portada */
.hero { display: grid; grid-template-columns: 1.25fr 1fr; gap: 40px; align-items: center; padding-block: 28px 48px; }
.kicker { font-weight: 700; color: #4F6B0A; letter-spacing: 0.02em; margin-bottom: 10px; font-size: 0.95rem; }
.lead { font-size: 1.2rem; margin-top: 16px; color: var(--text); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--lime); color: var(--ink); font-weight: 800;
  text-decoration: none; padding: 12px 20px; border-radius: 999px; border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink); transition: transform .1s, box-shadow .1s; }
.btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.btn.ghost { background: var(--card); }
.btn.soon { background: var(--lime-soft); color: var(--muted); border-color: var(--line); box-shadow: none; cursor: default; font-weight: 700; }
.btn.soon:hover { transform: none; }
.polaroids { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.polaroids img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; object-position: center 20%; background: #fff;
  border: 8px solid #fff; border-bottom-width: 22px; box-shadow: 0 10px 24px -14px rgba(31, 58, 11, .55); border-radius: 4px; }
.polaroids img:nth-child(1) { transform: rotate(-3deg); }
.polaroids img:nth-child(2) { transform: rotate(2.5deg); }
.polaroids img:nth-child(3) { transform: rotate(1.5deg); object-position: 72% 30%; }
.polaroids img:nth-child(4) { transform: rotate(-2deg); }

/* secciones */
section { padding-block: 44px; }
section.tint { background: rgba(238, 246, 214, .75); border-block: 1px solid var(--line); }
.head { margin-bottom: 26px; }
.head p { margin-top: 8px; color: var(--muted); font-size: 1.08rem; }
.prose > * + * { margin-top: 14px; }
.prose h2 { margin-top: 40px; }
.prose h3 { margin-top: 28px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 6px; }

/* tarjetas de asignatura */
.subjects { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.subject { background: var(--card); border: 2px solid var(--ink); border-radius: 18px; overflow: hidden;
  display: flex; flex-direction: column; box-shadow: 4px 4px 0 var(--lime); }
.subject img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; object-position: center 22%; border-bottom: 2px solid var(--ink); }
.subject.ciencias img { object-position: 75% 30%; }
.subject .body { padding: 16px 16px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.subject p { font-size: 0.97rem; color: var(--muted); }
.subject .tag { font-size: 0.85rem; font-weight: 700; color: var(--ink); background: var(--lime-soft); border-radius: 6px; padding: 2px 8px; align-self: flex-start; }
.subject .btn { margin-top: auto; align-self: flex-start; padding: 9px 16px; font-size: 0.95rem; }

/* pasos */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.steps li { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px 18px 18px 64px; position: relative; counter-increment: step; max-width: none; }
.steps li::before { content: counter(step); position: absolute; left: 16px; top: 16px; width: 34px; height: 34px; border-radius: 50%;
  background: var(--lime); color: var(--ink); font: 600 1.1rem/34px var(--display); text-align: center; border: 2px solid var(--ink); }
.steps strong { display: block; color: var(--ink); font-family: var(--display); font-weight: 600; font-size: 1.1rem; margin-bottom: 4px; }

/* sí / no */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.box { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; }
.box h3 { margin-bottom: 10px; }
.box ul { margin: 0; padding-left: 1.2em; }
.box li + li { margin-top: 6px; }
.box.yes { border-top: 6px solid var(--lime); }
.box.no { border-top: 6px solid #C9A227; }
.note { background: var(--note); border: 1px solid var(--note-line); border-radius: 12px; padding: 14px 18px; margin-top: 20px; max-width: 760px; }
.note p { max-width: none; }

/* comandos */
.cmds { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 165px), 1fr)); gap: 12px; list-style: none; padding: 0; margin: 0; }
.cmds li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; max-width: none; }
.cmds b { display: block; color: var(--ink); font-family: var(--display); font-weight: 600; font-size: 1.05rem; }
.cmds span { color: var(--muted); font-size: 0.95rem; }
.cmds .own { border-color: var(--lime); background: var(--lime-soft); }
.flow { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 14px 0 0; }
.flow li { background: var(--card); border: 2px solid var(--ink); border-radius: 999px; padding: 4px 14px; font-weight: 700; font-size: 0.95rem; max-width: none; }

/* cómo funciona */
.how { display: grid; grid-template-columns: minmax(0, 380px) 1fr; gap: 40px; align-items: start; }
.diagram { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 14px; }
.diagram svg { display: block; width: 100%; height: auto; }
.how ol { margin: 0; padding-left: 1.3em; }
.how li + li { margin-top: 10px; }

/* preguntas */
.faq { display: grid; gap: 10px; max-width: 780px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.faq details[open] { border-color: var(--lime-dark); }
.faq summary { cursor: pointer; font-weight: 800; color: var(--ink); }
.faq details p { margin-top: 8px; color: var(--muted); }
.faq details p + p { margin-top: 6px; }

/* créditos y pie */
.tribute { max-width: 780px; }
.small { font-size: 0.92rem; color: var(--muted); }
footer { border-top: 1px solid var(--line); padding-block: 26px 40px; color: var(--muted); font-size: 0.93rem; background: var(--paper); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }

/* guía técnica */
.doc { max-width: 780px; padding-block: 10px 50px; }
.doc .lead { margin-top: 12px; }
.doc ol.big > li { margin-top: 18px; }
.doc ol.big > li > strong:first-child { color: var(--ink); }
.doc pre { margin-top: 10px; }
.toc { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 20px; margin-top: 24px; }
.toc ol { margin: 6px 0 0; padding-left: 1.3em; }

@media (max-width: 900px) {
  .subjects { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .how { grid-template-columns: 1fr; }
  .diagram { max-width: 420px; }
}
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 28px; padding-top: 12px; }
  .polaroids { max-width: 300px; }
  .split { grid-template-columns: 1fr; }
  .hide-sm { display: none; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .subjects { grid-template-columns: 1fr; }
  .brand span { font-size: 1rem; }
  section { padding-block: 34px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

/* frases del proyecto */
.quotes { margin: 6px 0 0; padding: 4px 0 4px 18px; border-left: 6px solid var(--lime); }
.quotes p { font: 600 1.2rem/1.4 var(--display); color: var(--ink); }
.quotes p + p { margin-top: 6px; }

/* por qué: tarjetas de razones */
.reasons { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.reason { background: var(--card); border: 1px solid var(--line); border-left: 6px solid var(--lime); border-radius: 16px; padding: 18px 20px; }
.reason h3 { margin-bottom: 6px; }
.reason p { color: var(--text); }
.contrast { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 28px; }
.contrast .box p + p { margin-top: 8px; }

/* conversación de ejemplo */
.chat { display: grid; gap: 10px; max-width: 680px; margin-top: 8px; }
.chat p { padding: 10px 14px; border-radius: 16px; max-width: 88%; }
.chat .me { justify-self: end; background: var(--lime-soft); border: 1px solid var(--line); border-bottom-right-radius: 4px; }
.chat .bk { justify-self: start; background: var(--card); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.chat .who { display: block; font-size: 0.8rem; font-weight: 800; color: var(--muted); margin-bottom: 2px; }
.caption { color: var(--muted); font-size: 0.95rem; margin-top: 10px; max-width: 680px; }

/* situaciones de uso */
.cases { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: 14px; list-style: none; padding: 0; margin: 0; }
.cases li { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; max-width: none; }
.cases b { display: block; color: var(--ink); font-family: var(--display); font-weight: 600; font-size: 1.05rem; margin-bottom: 4px; }
.cases q { font-weight: 700; color: var(--ink); }

/* avisos dentro de la guía */
.warn { background: var(--note); border: 1px solid var(--note-line); border-radius: 12px; padding: 12px 16px; }
.doc .warn { margin-top: 14px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.doc th { color: var(--ink); }

@media (max-width: 760px) {
  .reasons, .contrast { grid-template-columns: 1fr; }
}

/* enlace a Sponsors en el menú */
.top nav a.nav-sponsor { color: var(--ink); background: var(--lime-soft); border: 1px solid var(--lime); border-radius: 999px; padding: 0 10px; }
.top nav a.nav-sponsor:hover { background: var(--lime); }

/* conversación animada (ver el script de index.html) */
.chat.anim p { opacity: 0; transform: translateY(6px); transition: opacity .4s ease, transform .4s ease; position: relative; }
.chat.anim p.shown { opacity: 1; transform: none; }
.chat.anim.fading p.shown { opacity: 0; transition-duration: .6s; }
/* «escribiendo»: la burbuja de Beakman sigue invisible y en su sitio sale una pequeña con tres puntos */
.chat.anim p.typing { opacity: 1; transform: none; background: transparent; border-color: transparent; }
.chat.anim p.typing > * { visibility: hidden; }
.chat.anim p.typing { color: transparent; }
.chat.anim p.typing::before { content: ""; position: absolute; left: 0; top: 0; width: 62px; height: 36px;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px 16px 16px 4px; }
.chat.anim p.typing::after { content: ""; position: absolute; left: 17px; top: 15px; width: 6px; height: 6px; border-radius: 50%;
  background: var(--muted); box-shadow: 11px 0 0 var(--muted), 22px 0 0 var(--muted); animation: dots 1s infinite; }
@keyframes dots { 0%, 100% { opacity: .3; } 50% { opacity: .9; } }