/* Marketing Digital · estilos */
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}img{max-width:100%}[hidden]{display:none!important}

/* Layout: portada con temario; una página por módulo con índice lateral (cajón en móvil) y lecciones seguidas */
:root{
  --bg:#f3f4f7; --surface:#ffffff; --ink:#141a2b; --muted:#5b6275; --line:#d9dce5;
  --signal:#ff5a1f; --signal-ink:#c2410c; --signal-soft:#ffe8dd; --done:#1f8a5b; --cool:#2f5bd3;
  --f-display:"Poppins", "Helvetica Neue", Arial, sans-serif;
  --f-body:"Poppins", "Helvetica Neue", Arial, sans-serif;
  --f-mono:"DM Mono", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f1320; --surface:#171c2c; --ink:#e9ebf2; --muted:#9aa1b5; --line:#2a3145;
  --signal:#ff6a33; --signal-ink:#ff8a5c; --signal-soft:#3a2219; --done:#3fbf86; --cool:#7f9cff; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f1320; --surface:#171c2c; --ink:#e9ebf2; --muted:#9aa1b5; --line:#2a3145;
  --signal:#ff6a33; --signal-ink:#ff8a5c; --signal-soft:#3a2219; --done:#3fbf86; --cool:#7f9cff; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.75}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--bg)}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* Cabecera */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:16px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--f-display);font-weight:800;font-size:22px;letter-spacing:-.02em}
.brand svg{width:28px;height:28px;flex:none}
.brand small{font-family:var(--f-mono);font-weight:400;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.top-prog{margin-left:auto;display:flex;align-items:center;gap:10px;font-family:var(--f-mono);font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.bar{width:110px;height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--signal);transition:width .4s}
.menu-btn{display:none;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:6px 12px;font-family:var(--f-mono);font-size:12px;cursor:pointer}

/* Portada */
.hero{padding-block:56px 40px}
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--signal-ink)}
.hero h1{font-family:var(--f-display);font-weight:800;font-size:clamp(42px,8vw,92px);line-height:.95;letter-spacing:-.03em;margin:14px 0 22px;text-wrap:balance;max-width:14ch}
.hero h1 em{font-style:normal;color:var(--signal)}
.hero p.lead{font-size:21px;max-width:60ch;color:var(--muted);margin:0 0 28px}
.hero-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;border:0;background:var(--signal);color:#fff;font-family:var(--f-display);font-weight:700;font-size:16px;cursor:pointer;text-decoration:none}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:40px;font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.stats b{display:block;font-family:var(--f-display);font-size:34px;color:var(--ink);font-weight:700;letter-spacing:-.02em}

/* Ondas de señal decorativas */
.wave{width:100%;height:60px;display:block;color:var(--signal);opacity:.9}

.map-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px;margin:48px 0 18px}
.map-head h2{font-family:var(--f-display);font-size:30px;margin:0;letter-spacing:-.02em}
.map-head span{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.blocks{display:grid;gap:36px;padding-bottom:64px}
.block h3{font-family:var(--f-mono);font-weight:500;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.mods{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.mod{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:12px;text-decoration:none;cursor:pointer;text-align:left;transition:border-color .2s,transform .2s}
.mod:hover{border-color:var(--signal);transform:translateY(-2px)}
.mod .n{grid-row:span 3;font-family:var(--f-display);font-weight:800;font-size:34px;line-height:1;color:var(--signal);font-variant-numeric:tabular-nums;min-width:1.4em}
.mod .t{font-family:var(--f-display);font-weight:700;font-size:19px;line-height:1.2}
.mod .d{font-size:15px;color:var(--muted);line-height:1.45}
.mod .m{font-family:var(--f-mono);font-size:11px;color:var(--muted);display:flex;gap:10px;align-items:center;margin-top:6px}
.dots{display:inline-flex;gap:3px}
.dots i{width:7px;height:7px;border-radius:50%;background:var(--line)}
.dots i.on{background:var(--done)}

/* Lector */
.reader{display:grid;grid-template-columns:290px minmax(0,1fr);gap:48px;padding-block:32px 80px}
nav.toc{position:sticky;top:calc(env(safe-area-inset-top,0px) + 76px);align-self:start;max-height:calc(100vh - 100px);overflow:auto;font-family:var(--f-display);font-size:14px;padding-right:6px}
.toc a.home{display:block;font-family:var(--f-mono);font-size:12px;color:var(--muted);text-decoration:none;margin-bottom:14px}
.toc details{border-top:1px solid var(--line);padding:8px 0}
.toc summary{cursor:pointer;list-style:none;display:flex;gap:10px;font-weight:700;line-height:1.3;padding:4px 0}
.toc summary::-webkit-details-marker{display:none}
.toc summary .n{font-family:var(--f-mono);font-weight:500;font-size:12px;color:var(--signal-ink);min-width:2ch;padding-top:2px}
.toc ol{list-style:none;margin:4px 0 4px 0;padding:0 0 0 calc(2ch + 10px)}
.toc li a{display:flex;gap:8px;padding:5px 8px;border-radius:6px;text-decoration:none;color:var(--muted);line-height:1.3}
.toc li a:hover{color:var(--ink);background:var(--surface)}
.toc li a.cur{color:var(--ink);background:var(--signal-soft)}
.toc li a .ck{width:10px;flex:none;color:var(--done)}

article{max-width:68ch;min-width:0}
.crumb{font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 14px}
.crumb b{color:var(--signal-ink);font-weight:500}
article h1{font-family:var(--f-display);font-weight:800;font-size:clamp(32px,5vw,50px);line-height:1.05;letter-spacing:-.03em;margin:12px 0 28px;text-wrap:balance}
article h2{font-family:var(--f-display);font-size:23px;letter-spacing:-.01em;margin:36px 0 8px;text-wrap:balance}
article p{margin:0 0 18px}
article ul{padding-left:1.2em;margin:0 0 18px}
article li{margin-bottom:8px}
article strong{font-weight:600}
.key{margin:32px 0;padding:20px 22px;border-left:4px solid var(--signal);background:var(--surface);border-radius:0 10px 10px 0}
.key span{display:block;font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--signal-ink);margin-bottom:6px}
.key p{margin:0;font-size:18px;font-weight:500;line-height:1.55}
.tbl{overflow-x:auto;margin:0 0 22px;border:1px solid var(--line);border-radius:10px}
.tbl table{border-collapse:collapse;width:100%;font-size:15px;min-width:460px}
.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-family:var(--f-mono);font-weight:500;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--surface)}
.tbl tr:last-child td{border-bottom:0}
.lesson-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.mark{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);cursor:pointer;font-family:var(--f-display);font-weight:700;font-size:15px}
.mark[aria-pressed="true"]{border-color:var(--done);color:var(--done)}
.pager{display:flex;gap:10px;flex-wrap:wrap}
.pager a{display:block;padding:10px 16px;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-family:var(--f-display);font-size:14px;max-width:260px;line-height:1.3}
.pager a small{display:block;font-family:var(--f-mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.pager a.next{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.pager a.next small{color:inherit;opacity:.7}

footer.foot{border-top:1px solid var(--line);font-family:var(--f-mono);font-size:12px;color:var(--muted)}
footer.foot .wrap{padding-block:24px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}

@media (max-width:860px){
  .reader{grid-template-columns:minmax(0,1fr);gap:0}
  .menu-btn{display:inline-block}
  nav.toc{position:fixed;inset:0 auto 0 0;width:min(86vw,340px);max-height:none;z-index:20;background:var(--bg);border-right:1px solid var(--line);padding:calc(env(safe-area-inset-top,0px) + 20px) 16px calc(env(safe-area-inset-bottom,0px) + 20px) max(16px,env(safe-area-inset-left,0px));transform:translateX(-105%);transition:transform .25s}
  nav.toc.open{transform:none}
  .scrim{position:fixed;inset:0;background:rgb(0 0 0 / .4);z-index:15}
  .bar{width:60px}
  body{font-size:17px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}


.fig{margin:30px 0;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:16px}
.fig svg{width:100%;height:auto;display:block;overflow:visible}
.fig figcaption{font-family:var(--f-body);font-size:14px;line-height:1.5;color:var(--muted);margin-top:12px}
.fig .t{font-family:var(--f-display);font-size:12.5px;fill:var(--ink)}
.fig .tm{font-family:var(--f-display);font-size:11px;fill:var(--muted)}
.fig .tb{font-weight:600}
.fig .on-fill{fill:#fff}
.fig .on-fill2{fill:#fff;opacity:.85}
.fig .on-ink{fill:var(--bg)}
.fig .sig-t{fill:var(--signal-ink)}
.s-sig{fill:var(--signal)} .s-cool{fill:var(--cool)} .s-done{fill:var(--done)} .s-mut2{fill:var(--muted)} .s-ink{fill:var(--ink)}
.s-soft{fill:var(--signal-soft)} .s-bg{fill:var(--bg)} .s-surf{fill:var(--surface)} .s-line{fill:var(--line)}
.ln-sig{stroke:var(--signal)} .ln-soft{stroke:var(--signal-soft)} .ln-line{stroke:var(--line)} .ln-mut{stroke:var(--muted)}
.bx{fill:var(--bg);stroke:var(--line);stroke-width:1.5}
.bx-sig{fill:var(--signal)}
.bx-banner{fill:var(--surface);stroke:var(--line);stroke-width:1.5;filter:drop-shadow(0 6px 14px rgb(0 0 0 / .12))}
.chip{fill:var(--surface);stroke:var(--line);stroke-width:1.5}
.br{fill:var(--signal)} .br0{opacity:.12} .br1{opacity:.22} .br2{opacity:.4} .br3{opacity:1}
.fig *{transform-box:fill-box}
/* Bucles ambientales: siempre activos, el fotograma en reposo ya es completo */
@keyframes ring{0%{transform:scale(1);opacity:.5}100%{transform:scale(2.2);opacity:0}}
.ring{transform-origin:center;animation:ring 6s ease-out infinite}
@keyframes ring2{0%{transform:scale(1);opacity:.7}100%{transform:scale(3.6);opacity:0}}
.ring2{transform-origin:center;animation:ring2 4s ease-out infinite;opacity:0}
@keyframes flow{to{stroke-dashoffset:-20}}
.flow{stroke-dasharray:5 5;animation:flow 1.2s linear infinite}
@keyframes spin{to{stroke-dashoffset:-100}}
.spin{animation:spin 8s linear infinite}
@keyframes bob{50%{transform:translateY(-3px)}}
.bob{animation:bob 3s ease-in-out infinite}
/* Entradas: solo al entrar en pantalla (.play) */
@keyframes gx{from{transform:scaleX(0)}}
@keyframes gy{from{transform:scaleY(0)}}
@keyframes pop{from{transform:scale(0);opacity:0}}
@keyframes draw{from{stroke-dashoffset:1}}
@keyframes up{from{transform:translateY(60px);opacity:0}}
.gx{transform-origin:left center} .gy{transform-origin:center bottom} .pop{transform-origin:center}
.draw{stroke-dasharray:1}
.play .gx{animation:gx 1s cubic-bezier(.2,.7,.2,1) both}
.play .gy{animation:gy .9s cubic-bezier(.2,.7,.2,1) both}
.play .pop{animation:pop .5s cubic-bezier(.3,1.4,.5,1) both}
.play .draw{animation:draw 1.6s ease-out both}
.play .slideup{animation:up .8s cubic-bezier(.2,.7,.2,1) .3s both}
/* Escena del buscador: bucle de escritura → respuesta → fuentes */
@keyframes typer{0%{transform:translateX(0)}22%,100%{transform:translateX(316px)}}
@keyframes fadein{0%,24%{opacity:0}34%,100%{opacity:1}}
@keyframes chipin{0%,46%{opacity:0;transform:translateY(8px)}56%,100%{opacity:1;transform:none}}
.typer{transform:translateX(316px)}
.play .typer{animation:typer 9s steps(36,end) infinite}
.play .fadein{animation:fadein 9s ease infinite}
.play .chipin{animation:chipin 9s ease infinite}
/* Portada */
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,360px);gap:32px;align-items:center}
.hero-art{width:100%;height:auto;max-width:360px;justify-self:end}
.hring{fill:none;stroke:var(--signal);stroke-width:2;transform-box:fill-box;transform-origin:center;animation:ring 3s ease-out infinite}
.harc{stroke:var(--ink);stroke-width:14;stroke-linecap:round}
@keyframes arc{0%,100%{opacity:1}50%{opacity:.25}}
.harc.a1{animation:arc 3s ease-in-out infinite}
.harc.a2{animation:arc 3s ease-in-out .3s infinite}
.harc.a3{animation:arc 3s ease-in-out .6s infinite}

.fig .mono{font-family:var(--f-mono);font-size:11.5px;fill:var(--ink)}
.fig .done-t{fill:var(--done)} .fig .cool-t{fill:var(--cool)}
.ln-cool{stroke:var(--cool)} .ln-ink{stroke:var(--ink)} .ln-bg{stroke:var(--bg)}
.ln-street{stroke:var(--line);stroke-width:10;stroke-linecap:round}
.st1{stop-color:var(--signal)} .st2{stop-color:var(--ink)}
@keyframes moveIn{from{transform:translate(var(--dx),var(--dy))}}
.play .moveIn{animation:moveIn 1.6s cubic-bezier(.5,0,.2,1) .2s both}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.bounce{animation:bounce 1.6s ease-in-out infinite}
@keyframes floatUp{0%{transform:translateY(0) scale(.6);opacity:0}15%{opacity:1}100%{transform:translateY(-140px) scale(1.1);opacity:0}}
.floatUp{transform-origin:center;animation:floatUp 2.8s ease-out infinite;opacity:0}
@keyframes hl{0%,30%,100%{opacity:.45}10%,20%{opacity:1}}
.hl{animation:hl 3.6s ease-in-out infinite}
/* Ilustración de portada */
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:40px;align-items:center}
.hero-art{width:100%;height:auto;display:block}
.hero-art .hf{fill:var(--signal-soft);stroke:var(--signal);stroke-width:2;stroke-linejoin:round}
.hero-art .hft{paint-order:stroke;stroke:var(--signal-soft);stroke-width:4px;font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;fill:var(--signal-ink)}
.hero-art .hc{fill:var(--surface);stroke:var(--line);stroke-width:1.5}
.hero-art .hct{font-family:var(--f-display);font-weight:600;font-size:13px;fill:var(--ink)}
.hero-art .hp{fill:var(--ink)} .hero-art .ringp.hp{fill:none;stroke:var(--signal);stroke-width:2;transform-origin:center;animation:ringp 2.4s ease-out infinite}
@keyframes ringp{0%{transform:scale(1);opacity:.8}100%{transform:scale(1.18,1.5);opacity:0}}
.hero-art .hpt{font-family:var(--f-display);font-weight:700;font-size:15px;fill:var(--bg)}
.hero-art .s-sig{fill:var(--signal)}
.hero-art *{transform-box:fill-box}
@media (max-width:860px){.hero-grid{grid-template-columns:minmax(0,1fr);gap:28px}.hero-art{max-width:440px;justify-self:start}}

.brand span{white-space:nowrap}
.toc .home.gl.t2{border-top:0;margin-top:4px;padding-top:0}
.recursos{padding-bottom:48px}
.rec-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.rec{display:grid;align-content:start;gap:6px;padding:20px;border-radius:14px;background:var(--surface);border:1px solid var(--line);text-decoration:none;transition:border-color .2s,transform .2s}
.rec:hover{border-color:var(--signal);transform:translateY(-2px)}
.rec b{font-family:var(--f-display);font-size:18px;line-height:1.3}
.rec span:last-child:not(.eyebrow){font-size:14px;color:var(--muted)}
.rec-main{background:var(--signal);border-color:var(--signal);color:#fff}
.rec-main .eyebrow,.rec-main span:last-child:not(.eyebrow){color:#fff;opacity:.9}
.rec-dark{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.rec-dark .eyebrow{color:var(--signal)}.rec-dark span:last-child:not(.eyebrow){color:var(--bg);opacity:.75}
.novedades{padding-bottom:48px}
.nov-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.nov-list li{display:grid;grid-template-columns:minmax(0,180px) minmax(0,1fr);gap:8px 24px;padding:18px 0;border-bottom:1px solid var(--line);font-size:16px}
.nov-list time{font-family:var(--f-mono);font-size:13px;color:var(--signal-ink);padding-top:3px}
@media (max-width:560px){.nov-list li{grid-template-columns:minmax(0,1fr)}}
.guide{max-width:72ch}
.guide h1{margin-top:6px}
.guide .g2{font-family:var(--f-display);font-size:24px;letter-spacing:-.01em;margin:36px 0 10px;text-wrap:balance}
.guide p,.guide li{font-size:17px}
.guide ul{padding-left:1.2em}.guide li{margin-bottom:8px}
.note{font-size:14px;color:var(--muted);margin:-8px 0 24px}
.quiz{display:grid;gap:16px;max-width:760px}
.quiz fieldset{margin:0;padding:18px 18px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface);min-width:0}
.quiz legend{float:left;width:100%;display:flex;gap:12px;font-family:var(--f-display);font-weight:600;font-size:17px;line-height:1.4;margin-bottom:12px;padding:0}
.quiz legend span{font-family:var(--f-mono);font-weight:500;color:var(--signal-ink);font-size:13px;padding-top:3px;min-width:2ch}
.quiz label{clear:both;display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:10px;cursor:pointer;font-size:16px;line-height:1.45}
.quiz label:hover{background:var(--bg)}
.quiz input{margin-top:4px;accent-color:var(--signal);flex:none}
.quiz label.right{background:color-mix(in srgb,var(--done) 14%,transparent)}
.quiz label.wrong{background:var(--signal-soft)}
.quiz fieldset.is-miss{border-color:var(--signal)}
.quiz fieldset.is-ok{border-color:var(--done)}
.quiz .exp{clear:both;margin:8px 4px 4px;font-size:14px;color:var(--muted)}
.quiz-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.quiz-result{max-width:760px;margin:24px 0 0;padding:18px 20px;border-radius:14px;font-size:17px;border:1px solid var(--line)}
.quiz-result.ok{background:color-mix(in srgb,var(--done) 14%,var(--surface));border-color:var(--done)}
.quiz-result.ko,.quiz-result.warn{background:var(--signal-soft);border-color:var(--signal)}
.cert{max-width:760px;margin-top:24px;padding:24px;border-radius:16px;background:var(--surface);border:1px solid var(--line)}
.cert h2{font-family:var(--f-display);font-size:24px;margin:0 0 12px}
.cert label{display:block;font-size:14px;color:var(--muted);margin-bottom:6px}
.cert-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.cert input{flex:1 1 220px;min-width:0;font:inherit;font-size:16px;padding:12px 14px;border-radius:999px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.cert input[aria-invalid="true"]{border-color:var(--signal)}
.cert img{display:block;width:100%;height:auto;margin-top:18px;border-radius:10px}
.btn{font:inherit;font-family:var(--f-display);font-weight:700}
.case{margin-top:64px;padding:28px 24px;border-radius:18px;background:var(--surface);border:1px solid var(--line);position:relative;overflow:hidden}
.case::before{content:"";position:absolute;inset:0 auto 0 0;width:6px;background:var(--signal)}
.case h2{font-family:var(--f-display);font-size:clamp(22px,3.2vw,28px);letter-spacing:-.02em;margin:6px 0 16px;text-wrap:balance}
.case-g{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.case-g h3{font-family:var(--f-mono);font-weight:500;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.case-g p{margin:0;font-size:16px}
.case-l{margin:20px 0 0;padding-top:16px;border-top:1px solid var(--line);font-size:16px}
.case-l b{color:var(--signal-ink)}
.case-s{margin:10px 0 0;font-size:13px;color:var(--muted)}
.case-s a{color:var(--muted)}
.guide-link{display:grid;gap:2px;margin:20px 0 8px;padding:16px 18px;border-radius:12px;background:var(--signal-soft);text-decoration:none;font-family:var(--f-display);font-weight:600;font-size:16px;line-height:1.35}
.guide-link .eyebrow{font-weight:400;font-size:11px}
.guide-link:hover{color:var(--signal-ink)}
.sources{margin:28px 0 8px;padding:16px 18px;border:1px dashed var(--line);border-radius:12px}
.sources h4{margin:0 0 8px;font-family:var(--f-mono);font-weight:500;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.sources ul{margin:0;padding-left:1.1em}.sources li{font-size:14px;margin-bottom:6px}
.sources a{color:var(--ink);text-decoration-color:var(--signal);text-underline-offset:3px}
.toc .home.gl{margin:16px 0 0;padding-top:12px;border-top:1px solid var(--line);color:var(--signal-ink)}
.gl-cta{padding-block:8px 48px}
.gl-cta a{display:grid;gap:4px;padding:24px;border-radius:16px;background:var(--ink);color:var(--bg);text-decoration:none}
.gl-cta a .eyebrow{color:var(--signal)}
.gl-cta a b{font-family:var(--f-display);font-size:clamp(22px,3vw,28px);line-height:1.15;letter-spacing:-.02em}
.gl-cta a span:last-child{opacity:.75;font-size:15px}
.gl-cta a:hover b{color:var(--signal)}
.gl-nav{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 32px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 58px);z-index:2;background:var(--bg);padding-block:10px;border-bottom:1px solid var(--line)}
.gl-nav a{font-family:var(--f-mono);font-size:13px;width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:var(--surface)}
.gl-nav a:hover{border-color:var(--signal);color:var(--signal-ink)}
.gl-letter{font-family:var(--f-display);font-size:28px;color:var(--signal);margin:32px 0 8px;scroll-margin-top:130px}
.gl-list{margin:0;max-width:820px}
.gl-term{padding:16px 0;border-bottom:1px solid var(--line);scroll-margin-top:130px}
.gl-term dt{font-family:var(--f-display);font-weight:700;font-size:18px}
.gl-term dd{margin:4px 0 0;color:var(--muted);font-size:16px}
.gl-term dd a{font-size:14px;color:var(--signal-ink);white-space:nowrap}
.gl-page{padding-block:32px 72px}
.gl-page h1{font-family:var(--f-display);font-weight:800;font-size:clamp(34px,6vw,60px);line-height:1.02;letter-spacing:-.03em;margin:10px 0 14px}
.gl-page .lead{font-size:19px;color:var(--muted);max-width:60ch;margin:0 0 20px}
.h1-eyebrow{display:block;font-size:12px;letter-spacing:.12em;margin-bottom:14px;font-weight:400}
.byline{font-size:14px;color:var(--muted);margin:-8px 0 24px}
.byline a{color:var(--ink);font-weight:600;text-decoration:none}
.byline a:hover{color:var(--signal-ink)}
.mod-hero .byline{margin:-12px 0 24px}
.hero .byline{margin:22px 0 0}
.migas{font-family:var(--f-mono);font-size:12px;color:var(--muted);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:4px 8px}
.migas a{color:var(--muted);text-decoration:none}.migas a:hover{color:var(--signal-ink)}
.summary{margin:28px 0 0;padding:20px 22px;background:var(--surface);border:1px solid var(--line);border-radius:14px}
.summary h2{font-family:var(--f-display);font-size:18px;margin:0 0 10px}
.summary ul{margin:0;padding-left:1.1em}.summary li{margin-bottom:8px;font-size:16px}
.summary li::marker{color:var(--signal)}
.faq{margin-top:64px;padding-top:32px;border-top:1px solid var(--line)}
.faq h2{font-family:var(--f-display);font-size:clamp(24px,3.4vw,30px);letter-spacing:-.02em;margin:0 0 16px;text-wrap:balance}
.faq-i{border-bottom:1px solid var(--line)}
.faq-i summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:16px 0;font-family:var(--f-display);font-weight:600;font-size:17px;line-height:1.4}
.faq-i summary::-webkit-details-marker{display:none}
.faq-i summary::after{content:"+";color:var(--signal);font-size:22px;line-height:1;flex:none;transition:transform .2s}
.faq-i[open] summary::after{transform:rotate(45deg)}
.faq-i p{margin:0 0 18px;color:var(--muted);font-size:16px}
.faq-wrap{padding-bottom:64px}
.faq-wrap .faq-i p{max-width:75ch}
.faq-wrap .faq{margin-top:0}
footer.foot a{color:inherit}
.brand{font-weight:700;font-size:20px}
html{-webkit-text-size-adjust:100%}
article p, article li{overflow-wrap:anywhere}
@media (max-width:560px){
  .brand{font-size:17px;gap:8px}.brand svg{width:24px;height:24px}
  .top-prog .bar{display:none}
  header.top .wrap{gap:10px}
  .hero{padding-block:28px 24px}
  .hero p.lead{font-size:17px}
  .stats{gap:20px}.stats b{font-size:28px}
  .mod-hero p.lead{font-size:17px}
  .lesson-list a{font-size:15px;grid-template-columns:1.8em minmax(0,1fr) auto}
  section.lesson{padding-top:40px}
  section.lesson + section.lesson{margin-top:36px}
  .fig{padding:12px;margin:24px -4px;border-radius:12px}
  .key{padding:16px 16px}
  .key p{font-size:16px}
  .mod-pager a,.mod-pager a.next{text-align:left;flex-basis:100%}
  .map-head h2{font-size:24px}
  .mod{padding:16px}
}
.mod-hero{padding-block:8px 8px}
.mod-hero .num{font-family:var(--f-display);font-weight:800;font-size:clamp(64px,12vw,120px);line-height:.85;color:var(--signal);letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.mod-hero h1{margin:10px 0 12px}
.mod-hero p.lead{font-size:20px;color:var(--muted);margin:0 0 24px}
.lesson-list{list-style:none;margin:0 0 8px;padding:0;border-top:1px solid var(--line)}
.lesson-list li{border-bottom:1px solid var(--line)}
.lesson-list a{display:grid;grid-template-columns:2.2em minmax(0,1fr) auto;gap:10px;align-items:baseline;padding:12px 0;text-decoration:none;font-family:var(--f-display);font-size:17px}
.lesson-list a:hover{color:var(--signal-ink)}
.lesson-list .i{font-family:var(--f-mono);font-size:12px;color:var(--signal-ink)}
.lesson-list .mn{font-family:var(--f-mono);font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.lesson-list .ck{color:var(--done)}
section.lesson{padding-top:56px;scroll-margin-top:calc(env(safe-area-inset-top,0px) + 72px)}
section.lesson + section.lesson{border-top:1px solid var(--line);margin-top:48px}
section.lesson h2.lt{font-family:var(--f-display);font-weight:800;font-size:clamp(28px,4.4vw,40px);line-height:1.08;letter-spacing:-.025em;margin:10px 0 24px;text-wrap:balance}
article h3{font-family:var(--f-display);font-size:22px;letter-spacing:-.01em;margin:32px 0 8px;text-wrap:balance}
.lesson .mark{margin-top:8px}
.mod-pager{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:64px;padding-top:24px;border-top:1px solid var(--line)}
.mod-pager a{display:block;flex:1 1 220px;padding:14px 18px;border:1px solid var(--line);border-radius:12px;text-decoration:none;font-family:var(--f-display);font-size:16px;line-height:1.3}
.mod-pager a small{display:block;font-family:var(--f-mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:2px}
.mod-pager a.next{text-align:right;background:var(--ink);color:var(--bg);border-color:var(--ink)}
.mod-pager a.next small{color:inherit;opacity:.7}
.toc .mods-list{list-style:none;margin:0;padding:0}
.toc .mods-list > li{border-top:1px solid var(--line);padding:6px 0}
.toc .mods-list > li > a{display:flex;gap:10px;font-weight:700;line-height:1.3;padding:4px 0;text-decoration:none;color:var(--ink);background:none}
.toc .mods-list > li > a .n{font-family:var(--f-mono);font-weight:500;font-size:12px;color:var(--signal-ink);min-width:2ch;padding-top:2px}
.toc .mods-list > li.cur > a{color:var(--signal-ink)}