/* QUANT AGENTIC ORCHESTRATION — tema "terminal clarity"
   Paleta alineada con quantarmy.com: fondo #0b0d11, superficie #12151c, acento #4a8ab5 */
:root {
  --bg: #0b0d11;
  --surface: #12151c;
  --surface-2: #171b24;
  --surface-3: #1c212c;
  --border: #1e2230;
  --border-hi: #2a3040;
  --text: #e8e8e8;
  --muted: #9aa0ae;
  --dim: #6d7382;
  --accent: #5b9bc7;
  --accent-hi: #7fb8dd;
  --amber: #d4a24e;
  --green: #4cae7e;
  --red: #c96a6a;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --maxw: 880px;
}

@font-face {
  font-family: "Manrope";
  font-weight: 100 1000;
  font-display: swap;
  src: url("../fonts/Manrope[wght].woff2") format("woff2-variations");
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(91, 155, 199, 0.35); }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hi); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- barra superior ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 0 28px; height: 58px;
  background: rgba(11, 13, 17, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar .brand {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.14em;
  color: var(--text); white-space: nowrap;
}
.topbar .brand b { color: var(--accent); font-weight: 700; }
.topbar nav { display: flex; gap: 4px; margin-left: auto; }
.topbar nav a {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  color: var(--muted); padding: 6px 12px; border-radius: 6px;
}
.topbar nav a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.langswitch { display: inline-flex; align-items: center; gap: 2px; margin-left: 10px; border: 1px solid var(--border-hi); border-radius: 6px; padding: 2px; }
.langswitch .langcur {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: #0b0d11; background: var(--accent); border-radius: 4px; padding: 4px 9px; font-weight: 700;
}
.langswitch a.langalt {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--dim); padding: 4px 9px;
}
.langswitch a.langalt:hover { color: var(--accent-hi); background: none; }
.progressline {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-hi));
  transition: width 0.1s linear;
}

/* ---------- layout con sidebar ---------- */
.layout {
  display: grid; grid-template-columns: 250px minmax(0, 1fr);
  max-width: 1280px; margin: 0 auto; gap: 48px; padding: 0 28px;
}
.sidebar {
  position: sticky; top: 58px; align-self: start;
  height: calc(100vh - 58px); overflow-y: auto;
  padding: 36px 0 60px;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
.sidebar .side-label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em;
  color: var(--dim); margin-bottom: 14px;
}
.sidebar .toc a {
  display: block; padding: 5px 0 5px 14px;
  border-left: 2px solid var(--border);
  color: var(--muted); font-size: 13px; line-height: 1.45;
}
.sidebar .toc a.toc-l3 { padding-left: 28px; font-size: 12.5px; color: var(--dim); }
.sidebar .toc a:hover { color: var(--text); text-decoration: none; }
.sidebar .toc a.active { border-left-color: var(--accent); color: var(--accent-hi); }
.sidebar .side-foot { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--border); }
.sidebar .side-foot a {
  display: block; font-family: var(--mono); font-size: 11.5px; color: var(--dim);
  padding: 4px 0; letter-spacing: 0.06em;
}
.sidebar .side-foot a:hover { color: var(--accent); }

.content { min-width: 0; padding: 44px 0 90px; max-width: var(--maxw); }

/* ---------- cabecera de módulo ---------- */
.modhead { margin-bottom: 44px; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.16em;
  color: var(--accent); border: 1px solid var(--border-hi);
  background: var(--surface); border-radius: 4px; padding: 5px 12px;
}
.kicker::before { content: ""; width: 7px; height: 7px; background: var(--accent); border-radius: 1px; }
.modhead h1 {
  font-size: clamp(28px, 4vw, 40px); line-height: 1.18; letter-spacing: -0.02em;
  margin: 20px 0 14px; font-weight: 800;
}
.modhead .lede { color: var(--muted); font-size: 17.5px; max-width: 70ch; margin: 0; }
.modmeta {
  display: flex; gap: 22px; margin-top: 20px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; color: var(--dim); letter-spacing: 0.05em;
}
.modmeta span b { color: var(--muted); font-weight: 600; }

/* ---------- tipografía de contenido ---------- */
.content h2 {
  font-size: 25px; letter-spacing: -0.015em; line-height: 1.25;
  margin: 64px 0 18px; padding-top: 20px;
  border-top: 1px solid var(--border); font-weight: 750;
}
.content h3 { font-size: 19px; margin: 44px 0 12px; font-weight: 700; color: #f0f0f2; }
.content h4 { font-size: 16px; margin: 30px 0 10px; font-weight: 700; color: var(--accent-hi); }
.content p { margin: 0 0 18px; }
.content ul, .content ol { margin: 0 0 20px; padding-left: 26px; }
.content li { margin-bottom: 8px; }
.content li::marker { color: var(--accent); }
.content strong { color: #fff; font-weight: 700; }
.content em { color: #d7dae0; }
.content hr { border: none; border-top: 1px solid var(--border); margin: 48px 0; }
.content blockquote {
  margin: 24px 0; padding: 16px 22px;
  border-left: 3px solid var(--amber);
  background: rgba(212, 162, 78, 0.06);
  color: #d9d3c5; border-radius: 0 8px 8px 0;
}
.content blockquote p:last-child { margin-bottom: 0; }

/* enlaces a fuentes: discretos */
.content p a, .content li a, .content td a { text-decoration: none; border-bottom: 1px dotted rgba(91,155,199,.45); }
.content p a:hover, .content li a:hover { border-bottom-style: solid; }

/* ---------- código ---------- */
code {
  font-family: var(--mono); font-size: 0.86em;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 5px; padding: 2px 6px; color: #cfe3f0;
}
.highlight {
  position: relative; margin: 26px 0;
  background: #0d1017; border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden;
}
.highlight pre {
  margin: 0; padding: 20px 22px; overflow-x: auto;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.65;
  background: transparent;
}
.highlight code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }
.copybtn {
  position: absolute; top: 10px; right: 10px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  color: var(--dim); background: var(--surface-2);
  border: 1px solid var(--border-hi); border-radius: 5px;
  padding: 4px 10px; cursor: pointer; opacity: 0; transition: opacity .15s;
}
.highlight:hover .copybtn { opacity: 1; }
.copybtn:hover { color: var(--accent-hi); border-color: var(--accent); }
.copybtn.ok { color: var(--green); border-color: var(--green); }

/* ---------- tablas ---------- */
.tablewrap { overflow-x: auto; margin: 26px 0; border: 1px solid var(--border); border-radius: 10px; }
.content table {
  border-collapse: collapse; width: 100%;
  font-size: 14px; line-height: 1.55;
}
.content thead th {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); text-align: left;
  background: var(--surface-2); padding: 12px 16px;
  border-bottom: 1px solid var(--border-hi); white-space: nowrap;
}
.content tbody td { padding: 11px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.content tbody tr:last-child td { border-bottom: none; }
.content tbody tr:hover td { background: rgba(91, 155, 199, 0.045); }

/* ---------- figuras ---------- */
.content figure, .qao-diagram {
  margin: 30px 0; padding: 18px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  text-align: center;
}
.content figure img, .qao-diagram img { max-width: 100%; height: auto; border-radius: 6px; }
.content figure figcaption, .content p > em:only-child { display: block; }
.content figure + p em { color: var(--dim); }
.content p img { max-width: 100%; border-radius: 8px; }
/* pies de figura del curso (párrafo en cursiva tras la imagen) */
.content p:has(> img) { margin-bottom: 4px; }

/* ---------- fórmulas (MathJax) ---------- */
.content mjx-container[jax="CHTML"] { color: var(--text); }
.content mjx-container[jax="CHTML"][display="true"] {
  margin: 24px 0 !important;
  padding: 14px 18px;
  max-width: 100%;
  overflow-x: auto; overflow-y: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  scrollbar-width: thin;
}
.content li mjx-container[jax="CHTML"][display="true"],
.content .qao-exp mjx-container[jax="CHTML"][display="true"] { background: var(--surface-2); }

/* ---------- panel EXPANDE (enriquecimiento) ---------- */
.qao-exp {
  position: relative; margin: 30px 0; padding: 24px 26px 14px;
  background: linear-gradient(180deg, rgba(212,162,78,0.055), rgba(212,162,78,0.02));
  border: 1px solid rgba(212, 162, 78, 0.28);
  border-left: 3px solid var(--amber);
  border-radius: 0 12px 12px 0;
}
.qao-exp-label {
  position: absolute; top: -10px; left: 18px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.22em;
  color: #0b0d11; background: var(--amber);
  padding: 2px 10px; border-radius: 3px; font-weight: 700;
}
.qao-exp h4 { color: var(--amber); margin-top: 6px; }
.qao-exp .highlight { background: #0c0f15; }

/* ---------- objetivos de aprendizaje ---------- */
.content h2:first-of-type { border-top: none; }

/* ---------- quiz ---------- */
.quiz {
  margin: 70px 0 30px; padding: 30px 30px 22px;
  background: var(--surface); border: 1px solid var(--border-hi);
  border-radius: 14px;
}
.quiz-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 6px; }
.quiz-head .q-kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; color: var(--green);
  border: 1px solid rgba(76,174,126,.4); border-radius: 4px; padding: 4px 10px;
}
.quiz-head h2 { border: none; margin: 0; padding: 0; font-size: 23px; }
.quiz-sub { color: var(--muted); font-size: 14.5px; margin: 8px 0 24px; }
.quiz-q { border-top: 1px solid var(--border); padding: 20px 0 8px; }
.quiz-q .q-title { font-weight: 650; margin-bottom: 14px; font-size: 15.5px; }
.quiz-q .q-title .q-num { font-family: var(--mono); color: var(--green); font-size: 12px; margin-right: 10px; }
.quiz-opt {
  display: block; width: 100%; text-align: left;
  margin: 8px 0; padding: 12px 16px;
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px;
  font-family: var(--sans); font-size: 14.5px; line-height: 1.5; cursor: pointer;
  transition: border-color .12s, background .12s;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--accent); background: var(--surface-3); }
.quiz-opt:disabled { cursor: default; opacity: .75; }
.quiz-opt.correct { border-color: var(--green); background: rgba(76,174,126,.12); opacity: 1; }
.quiz-opt.wrong { border-color: var(--red); background: rgba(201,106,106,.10); opacity: 1; }
.quiz-opt .opt-key { font-family: var(--mono); font-size: 11px; color: var(--dim); margin-right: 10px; }
.quiz-why {
  display: none; margin: 12px 0 6px; padding: 13px 16px;
  font-size: 14px; color: #cdd3dd; line-height: 1.6;
  background: rgba(91,155,199,.07); border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
}
.quiz-why.show { display: block; }
.quiz-score {
  display: none; margin-top: 20px; padding: 16px 20px;
  border: 1px solid rgba(76,174,126,.4); border-radius: 10px;
  background: rgba(76,174,126,.08);
  font-family: var(--mono); font-size: 13px; letter-spacing: .05em; color: var(--green);
}
.quiz-score.show { display: block; }

/* ---------- navegación anterior/siguiente ---------- */
.modnav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 70px; padding-top: 26px; border-top: 1px solid var(--border);
}
.modnav a {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.06em;
  color: var(--muted); border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 18px; background: var(--surface);
}
.modnav a:hover { color: var(--accent-hi); border-color: var(--accent); text-decoration: none; }

/* ---------- portada ---------- */
.hero { padding: 84px 28px 60px; max-width: 1150px; margin: 0 auto; }
.hero .sys {
  font-family: var(--mono); font-size: 12px; letter-spacing: .2em; color: var(--green);
  margin-bottom: 22px;
}
.hero .sys::before { content: "● "; }
.hero h1 {
  font-size: clamp(38px, 6vw, 68px); line-height: 1.04; letter-spacing: -0.03em;
  font-weight: 850; margin: 0 0 22px; max-width: 16ch;
}
.hero h1 .hl { color: var(--accent); }
.hero .lede { font-size: 19px; color: var(--muted); max-width: 62ch; margin: 0 0 34px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; font-family: var(--mono); font-size: 13px; letter-spacing: .08em;
  padding: 14px 26px; border-radius: 8px; border: 1px solid var(--border-hi);
  color: var(--text); background: var(--surface);
}
.btn:hover { text-decoration: none; border-color: var(--accent); color: var(--accent-hi); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #0b0d11; font-weight: 700; }
.btn.primary:hover { background: var(--accent-hi); color: #0b0d11; }

.hero-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; margin-top: 56px;
}
.hero-stats .stat { background: var(--surface); padding: 22px 24px; }
.hero-stats .stat b { display: block; font-family: var(--mono); font-size: 26px; color: var(--accent-hi); font-weight: 700; }
.hero-stats .stat span { font-size: 12.5px; color: var(--dim); letter-spacing: .04em; }

.section { max-width: 1150px; margin: 0 auto; padding: 44px 28px; }
.section > .kicker { margin-bottom: 16px; }
.section > h2 { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -0.02em; margin: 14px 0 16px; font-weight: 800; max-width: 24ch; }
.section > .lede { color: var(--muted); max-width: 68ch; font-size: 16.5px; margin-bottom: 30px; }

/* rejilla de módulos */
.modgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 16px; }
.modcard {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 22px 24px; transition: border-color .15s, transform .15s;
}
.modcard:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); }
.modcard .mc-top { display: flex; justify-content: space-between; align-items: center; }
.modcard .mc-num { font-family: var(--mono); font-size: 22px; color: var(--dim); font-weight: 700; }
.modcard .mc-tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .16em; color: var(--accent);
  border: 1px solid var(--border-hi); border-radius: 4px; padding: 3px 9px;
}
.modcard h3 { margin: 0; font-size: 16.5px; line-height: 1.35; color: var(--text); font-weight: 700; }
.modcard p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.55; flex: 1; }
.modcard .mc-go { font-family: var(--mono); font-size: 11px; color: var(--dim); letter-spacing: .1em; }
.modcard:hover .mc-go { color: var(--accent-hi); }

/* pilares / público */
.cols3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.pillar {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px 26px;
}
.pillar .p-k { font-family: var(--mono); font-size: 11px; color: var(--amber); letter-spacing: .18em; margin-bottom: 12px; }
.pillar h3 { margin: 0 0 10px; font-size: 17px; }
.pillar p, .pillar li { font-size: 14.5px; color: var(--muted); }
.pillar ul { margin: 0; padding-left: 20px; }
.pillar li { margin-bottom: 7px; }

/* regla de oro */
.golden {
  border: 1px solid rgba(212,162,78,.35); background: linear-gradient(180deg, rgba(212,162,78,.07), rgba(212,162,78,.02));
  border-radius: 14px; padding: 34px 38px; text-align: center;
}
.golden .g-formula {
  font-family: var(--mono); font-size: clamp(15px, 2.6vw, 22px); letter-spacing: .04em;
  color: var(--amber);
}
.golden .g-formula b { color: #f0d9ac; }
.golden p { color: var(--muted); max-width: 70ch; margin: 16px auto 0; font-size: 15px; }

/* footer */
.footer {
  border-top: 1px solid var(--border); margin-top: 60px;
  padding: 34px 28px 44px; text-align: center;
  font-family: var(--mono); font-size: 11.5px; color: var(--dim); letter-spacing: .08em;
}
.footer a { color: var(--muted); }

/* ---------- catálogo /cursos ---------- */
.cat-hero { padding: 72px 28px 40px; max-width: 1150px; margin: 0 auto; }
.cat-hero h1 { font-size: clamp(32px, 5vw, 52px); letter-spacing: -0.025em; margin: 16px 0 14px; font-weight: 850; }
.cat-hero .lede { color: var(--muted); max-width: 64ch; font-size: 17px; }
.cat-grid { max-width: 1150px; margin: 0 auto; padding: 10px 28px 70px; display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 20px; }
.cat-card {
  position: relative; display: flex; flex-direction: column; gap: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 28px 30px; overflow: hidden; transition: border-color .15s, transform .15s;
}
.cat-card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-3px); }
.cat-card .cc-badge {
  align-self: flex-start; font-family: var(--mono); font-size: 10px; letter-spacing: .18em;
  color: #0b0d11; background: var(--green); font-weight: 700; border-radius: 4px; padding: 3px 10px;
}
.cat-card h2 { margin: 0; font-size: 21px; letter-spacing: -0.01em; color: var(--text); }
.cat-card .cc-sub { font-family: var(--mono); font-size: 11.5px; color: var(--accent); letter-spacing: .06em; }
.cat-card p { margin: 0; color: var(--muted); font-size: 14.5px; flex: 1; }
.cat-card .cc-meta {
  display: flex; gap: 18px; font-family: var(--mono); font-size: 11px; color: var(--dim); letter-spacing: .05em;
  border-top: 1px solid var(--border); padding-top: 14px;
}
.cat-card .cc-go { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: .1em; }
.cat-card:hover .cc-go { color: var(--accent-hi); }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .topbar { padding: 0 16px; gap: 10px; }
  .topbar .brand { font-size: 11px; }
  .layout, .hero, .section, .cat-hero { padding-left: 18px; padding-right: 18px; }
  .quiz { padding: 22px 18px; }
  .cat-grid { grid-template-columns: 1fr; padding-left: 18px; padding-right: 18px; }
}