:root{
  --bg:#0b0b0d;--surface:#131317;--surface-2:#1a1a1f;--surface-3:#222229;--line:#2b2b33;
  --text:#ececef;--muted:#a3a3ad;--faint:#6f6f7a;
  --red:#e30613;--red-2:#ff3341;--red-soft:rgba(227,6,19,.12);--red-line:rgba(227,6,19,.45);
  --ok:#2fbf71;--ok-soft:rgba(47,191,113,.12);--bad:#ff4d5a;--bad-soft:rgba(255,77,90,.12);--amber:#f5b301;--amber-soft:rgba(245,179,1,.10);
  --img-bg:#ffffff;--shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:14px;--maxw:1240px;
  --font:"Barlow",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-c:"Barlow Condensed","Barlow",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f4f3f1;--surface:#ffffff;--surface-2:#f7f6f4;--surface-3:#eeece9;--line:#dedbd6;
  --text:#16161a;--muted:#55555f;--faint:#8a8a93;
  --red:#c8000f;--red-2:#e30613;--red-soft:rgba(200,0,15,.07);--red-line:rgba(200,0,15,.35);
  --ok:#14864a;--ok-soft:rgba(20,134,74,.09);--bad:#c41d2b;--bad-soft:rgba(196,29,43,.08);--amber:#9a6b00;--amber-soft:rgba(245,179,1,.12);
  --shadow:0 8px 24px rgba(0,0,0,.08);color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.62;overflow-x:hidden}
img{max-width:100%;height:auto}
a{color:var(--red-2)}
button{font:inherit;cursor:pointer}
::selection{background:var(--red);color:#fff}

/* ---------- barra superior ---------- */
.topbar{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:var(--maxw);margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);min-width:0}
.brand-mark{width:30px;height:30px;flex:none}
.brand-txt{font-family:var(--font-c);font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-txt b{color:var(--red-2)}
.top-sp{flex:1}
.icon-btn{background:var(--surface-2);border:1px solid var(--line);color:var(--text);border-radius:10px;height:36px;min-width:36px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:14px}
.icon-btn:hover{border-color:var(--red-line)}
.progress{height:3px;background:transparent}
.progress>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--red),var(--red-2));transition:width .15s}

/* ---------- portada ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 400px at 85% -10%,rgba(227,6,19,.28),transparent 60%),
  repeating-linear-gradient(90deg,transparent 0 59px,color-mix(in srgb,var(--line) 55%,transparent) 59px 60px),
  repeating-linear-gradient(0deg,transparent 0 59px,color-mix(in srgb,var(--line) 55%,transparent) 59px 60px);
  mask-image:linear-gradient(180deg,#000 30%,transparent);opacity:.9}
.hero-in{position:relative;max-width:var(--maxw);margin:0 auto;padding:56px 16px 44px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:end}
.kicker{font-family:var(--font-c);text-transform:uppercase;letter-spacing:.18em;font-size:14px;color:var(--red-2);font-weight:600;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.kicker .free{background:var(--ok-soft);color:var(--ok);border:1px solid color-mix(in srgb,var(--ok) 40%,transparent);padding:2px 8px;border-radius:99px;letter-spacing:.08em;font-size:12px}
.hero h1{font-family:var(--font-c);font-weight:700;font-size:clamp(34px,5.4vw,64px);line-height:1.02;margin:10px 0 12px;letter-spacing:-.005em;text-wrap:balance}
.hero .sub{color:var(--muted);font-size:clamp(16px,1.6vw,19px);max-width:760px;margin:0;text-wrap:pretty}
.bignum{font-family:var(--font-c);font-weight:700;font-size:clamp(84px,13vw,170px);line-height:.8;color:transparent;-webkit-text-stroke:2px var(--red);opacity:.95;user-select:none}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:6px 12px;font-size:14px;color:var(--muted)}
.chip svg{width:15px;height:15px;color:var(--red-2)}
.chip b{color:var(--text);font-weight:600}
.author{margin-top:18px;font-size:14px;color:var(--faint)}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:28px 16px 64px;display:grid;grid-template-columns:270px minmax(0,1fr);gap:40px;align-items:start}
.toc{position:sticky;top:68px;max-height:calc(100vh - 84px);overflow:auto;padding-right:4px;scrollbar-width:thin}
.toc h4{font-family:var(--font-c);text-transform:uppercase;letter-spacing:.14em;font-size:13px;color:var(--faint);margin:0 0 10px}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{counter-increment:t}
.toc a{display:grid;grid-template-columns:26px 1fr;gap:6px;align-items:start;padding:7px 8px;border-radius:9px;color:var(--muted);text-decoration:none;font-size:14.5px;line-height:1.35;border-left:2px solid transparent}
.toc a::before{content:counter(t,decimal-leading-zero);font-family:var(--mono);font-size:11.5px;color:var(--faint);padding-top:2px}
.toc a:hover{background:var(--surface-2);color:var(--text)}
.toc a.active{background:var(--red-soft);color:var(--text);border-left-color:var(--red)}
.toc a.done::before{content:"✓";color:var(--ok);font-family:var(--font)}
.toc .sub a{grid-template-columns:1fr;padding:4px 8px 4px 40px;font-size:13px}
.toc .sub a::before{content:none}
.toc .sub{counter-reset:none}
.toc .sub li{counter-increment:none}
.toc .toc-extra{margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.toc .toc-extra a{grid-template-columns:26px 1fr}
.toc .toc-extra a::before{content:"★";color:var(--red-2)}
.toc .toc-extra li:last-child a::before{content:"✎"}

main{min-width:0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.objectives{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;margin-bottom:34px;border-color:var(--red-line);background:linear-gradient(135deg,var(--red-soft),transparent 70%),var(--surface)}
.obj-ic{width:44px;height:44px;border-radius:12px;background:var(--red);display:grid;place-items:center;color:#fff}
.objectives h2{font-family:var(--font-c);font-size:22px;margin:0 0 8px;text-transform:uppercase;letter-spacing:.04em}
.objectives ul{margin:0;padding-left:20px;color:var(--text)}
.objectives li{margin:4px 0}

/* ---------- secciones de contenido ---------- */
.sec{scroll-margin-top:76px;margin:0 0 44px}
.sec-h{display:flex;align-items:baseline;gap:14px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:20px}
.sec-n{font-family:var(--mono);font-size:13px;color:var(--red-2);background:var(--red-soft);border:1px solid var(--red-line);border-radius:7px;padding:2px 8px;flex:none;transform:translateY(-4px)}
.sec h2{font-family:var(--font-c);font-weight:700;font-size:clamp(25px,3vw,34px);line-height:1.1;margin:0;text-wrap:balance}
.content{max-width:820px}
.content p{margin:0 0 14px}
.content ul,.content ol{padding-left:22px;margin:0 0 16px}
.content li{margin:6px 0}
.content li::marker{color:var(--red-2)}
.content strong{color:var(--text)}
.content h3{scroll-margin-top:76px}
h3.norma{display:flex;align-items:center;gap:10px;font-family:var(--font-c);font-size:16px;letter-spacing:.1em;margin:30px 0 14px;color:var(--text);background:var(--surface-2);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:10px;padding:8px 12px;width:fit-content;max-width:100%}
h3.norma img.icon{border-radius:4px;background:var(--img-bg);padding:2px}
.content h2,.content h3:not(.norma):not(.resumen-h){font-family:var(--font-c);font-size:22px;margin:26px 0 12px}
img.icon{display:inline-block;vertical-align:middle;margin:0}
img.zoom{display:block;border-radius:10px;background:var(--img-bg);padding:6px;margin:10px 0 6px;cursor:zoom-in;border:1px solid var(--line);transition:transform .2s,box-shadow .2s}
img.zoom:hover{box-shadow:0 0 0 2px var(--red-line)}
p:has(> img.zoom){margin-bottom:4px}
p:has(> img.zoom + img.zoom),p:has(> img.zoom ~ img.zoom){display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start}
p:has(> img.zoom ~ img.zoom) img.zoom{flex:1 1 220px;max-width:calc(50% - 6px)!important;object-fit:contain}
.credit{font-size:12.5px;color:var(--faint);font-style:italic;margin:-2px 0 18px!important}
aside.note{position:relative;margin:18px 0 22px;padding:16px 18px 16px 20px;background:var(--amber-soft);border:1px solid color-mix(in srgb,var(--amber) 35%,transparent);border-left:4px solid var(--amber);border-radius:12px}
aside.note p{margin:0 0 6px}aside.note p:last-child{margin:0}
.note-label{display:inline-flex;gap:6px;align-items:center;font-family:var(--font-c);text-transform:uppercase;letter-spacing:.12em;font-size:12.5px;font-weight:700;color:var(--amber);margin-bottom:6px}
.note-label::before{content:"!";display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:var(--amber);color:#111;font-family:var(--font);font-size:12px;letter-spacing:0}
.indent{padding-left:16px;border-left:2px solid var(--line);margin:0 0 14px}
.formula{display:block;overflow-x:auto;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:12px 0 16px;text-align:center}
math{font-size:1.08em}
.formula math{font-size:1.18em}
.table-wrap{overflow-x:auto;margin:14px 0 20px;border-radius:12px;-webkit-overflow-scrolling:touch}
table.data{border-collapse:collapse;width:100%;font-size:14.5px;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.data th,table.data td{border-bottom:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
table.data thead th{background:var(--red);color:#fff;font-family:var(--font-c);letter-spacing:.04em;font-weight:600;font-size:15px}
table.data tbody tr:nth-child(even){background:var(--surface-2)}
table.data td p,table.data th p{margin:0}
table.gallery{width:100%;border-collapse:separate;border-spacing:10px 6px}
table.gallery td,table.gallery th{vertical-align:top;text-align:center;font-size:13px;color:var(--muted);font-weight:400;padding:0;border:0;background:none}
table.gallery img.zoom{margin:0 auto 4px}
table.gallery p{margin:0}
h3.resumen-h{display:flex;align-items:center;gap:10px;font-family:var(--font-c);text-transform:uppercase;letter-spacing:.06em;font-size:20px;margin:34px 0 0;padding:14px 18px;background:var(--surface-2);border:1px solid var(--line);border-bottom:0;border-radius:14px 14px 0 0}
h3.resumen-h::before{content:"";width:22px;height:22px;flex:none;background:var(--ok);-webkit-mask:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 11l3 3L22 4M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11" fill="none" stroke="black" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>') center/contain no-repeat;mask:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 11l3 3L22 4M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11" fill="none" stroke="black" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>') center/contain no-repeat}
ul.checklist{list-style:none;padding:8px 10px 10px;margin:0 0 22px;background:var(--surface);border:1px solid var(--line);border-radius:0 0 14px 14px}
ul.checklist li{margin:0}
ul.checklist label{display:grid;grid-template-columns:24px 1fr;gap:10px;align-items:start;padding:9px 8px;border-radius:9px;cursor:pointer}
ul.checklist label:hover{background:var(--surface-2)}
ul.checklist input{appearance:none;width:20px;height:20px;margin:3px 0 0;border:2px solid var(--faint);border-radius:6px;display:grid;place-items:center;cursor:pointer}
ul.checklist input:checked{background:var(--ok);border-color:var(--ok)}
ul.checklist input:checked::after{content:"";width:6px;height:11px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translate(-1px,-1px)}
ul.checklist input:checked+span{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--faint)}
ul.checklist p{margin:0}
.cl-count{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--muted);letter-spacing:0;text-transform:none}

/* diagramas reconstruidos */
.diagram{margin:16px 0 22px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.d-title{font-family:var(--font-c);text-transform:uppercase;letter-spacing:.1em;font-size:14px;color:var(--red-2);font-weight:600;margin-bottom:12px}
.d-steps{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.d-inline .d-steps{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.d-steps li{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;background:var(--surface-2);border:1px solid var(--line);border-radius:11px;padding:12px;margin:0}
.d-steps li::marker{content:none}
.d-k{width:34px;height:34px;border-radius:9px;background:var(--red);color:#fff;display:grid;place-items:center;font-family:var(--font-c);font-weight:700;font-size:18px}
.d-steps strong{display:block;line-height:1.25}
.d-steps span:not(.d-k){display:block;color:var(--muted);font-size:14.5px;margin-top:3px;line-height:1.4}
.d-kv{display:grid;gap:8px}
.d-row{display:grid;grid-template-columns:190px 1fr;gap:14px;padding:10px 12px;background:var(--surface-2);border-radius:10px;border:1px solid var(--line);font-size:15px}
.d-row strong{color:var(--red-2);font-family:var(--font-c);font-size:16px;letter-spacing:.02em}
.d-row span{color:var(--muted)}
.d-hub{display:grid;gap:12px;justify-items:center}
.d-core{background:var(--red);color:#fff;font-family:var(--font-c);font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:14px 22px;border-radius:12px;text-align:center}
.d-sats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;width:100%;position:relative}
.d-sats span{background:var(--surface-2);border:1px solid var(--red-line);border-radius:11px;padding:12px 8px;text-align:center;font-weight:600;font-size:15px;position:relative}
.d-sats span::before{content:"";position:absolute;left:50%;top:-12px;height:12px;border-left:2px solid var(--red-line)}
.bars .bar{display:grid;grid-template-columns:minmax(120px,240px) 1fr 52px;gap:12px;align-items:center;margin:8px 0;font-size:14.5px}
.bar-l{color:var(--muted);line-height:1.25}
.bar-t{height:14px;background:var(--surface-3);border-radius:99px;overflow:hidden}
.bar-f{display:block;height:100%;background:linear-gradient(90deg,var(--red),var(--red-2));border-radius:99px}
.bar-v{font-family:var(--mono);font-size:13.5px;text-align:right}
.bars figcaption{font-size:12.5px;color:var(--faint);margin-top:8px}

/* ---------- ideas clave ---------- */
.keys{margin:10px 0 48px;scroll-margin-top:76px}
.keys h2,.quiz h2{font-family:var(--font-c);font-weight:700;font-size:clamp(25px,3vw,34px);margin:0 0 16px;display:flex;gap:12px;align-items:center}
.keys-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;counter-reset:k}
.key{counter-increment:k;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 16px 16px 18px;position:relative;overflow:hidden}
.key::before{content:counter(k,decimal-leading-zero);display:block;font-family:var(--mono);font-size:12px;color:var(--red-2);margin-bottom:6px}
.key::after{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--red)}

/* ---------- test ---------- */
.quiz{scroll-margin-top:76px}
.quiz-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px;position:relative;overflow:hidden}
.quiz-intro{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}
.quiz-intro p{margin:0;color:var(--muted)}
.qfacts{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:12px 20px;font-weight:600;border:1px solid transparent;font-size:16px;text-decoration:none}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-2)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed}
.btn-ghost{background:var(--surface-2);color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--red-line)}
.qhead{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.qcount{font-family:var(--mono);font-size:13px;color:var(--muted)}
.qdots{display:flex;gap:5px}
.qdots i{width:22px;height:5px;border-radius:9px;background:var(--surface-3)}
.qdots i.on{background:var(--red)}
.qdots i.cur{background:var(--red-2);box-shadow:0 0 0 2px var(--red-soft)}
.qtext{font-size:clamp(19px,2.2vw,23px);font-weight:600;line-height:1.35;margin:0 0 18px;text-wrap:pretty}
.opts{display:grid;gap:10px}
.opt{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:center;text-align:left;background:var(--surface-2);border:1.5px solid var(--line);color:var(--text);border-radius:12px;padding:12px 14px;font-size:16px;line-height:1.4;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--red-line)}
.opt .l{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:var(--surface-3);font-family:var(--font-c);font-weight:700;font-size:17px}
.opt[aria-pressed="true"]{border-color:var(--red);background:var(--red-soft)}
.opt[aria-pressed="true"] .l{background:var(--red);color:#fff}
.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}
.result{display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center}
.ring{--p:0;width:150px;height:150px;border-radius:50%;background:conic-gradient(var(--rc,var(--red)) calc(var(--p)*1%),var(--surface-3) 0);display:grid;place-items:center}
.ring>div{width:118px;height:118px;border-radius:50%;background:var(--surface);display:grid;place-items:center;text-align:center}
.ring b{font-family:var(--font-c);font-size:44px;line-height:1}
.ring small{display:block;color:var(--muted);font-size:13px}
.verdict{font-family:var(--font-c);font-size:30px;font-weight:700;margin:0 0 6px}
.verdict.pass{color:var(--ok)}.verdict.fail{color:var(--bad)}
.res-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.review{margin-top:26px;display:grid;gap:12px}
.rv{border:1px solid var(--line);border-radius:14px;padding:16px;background:var(--surface-2)}
.rv.ok{border-left:4px solid var(--ok)}.rv.ko{border-left:4px solid var(--bad)}
.rv h5{margin:0 0 10px;font-size:16.5px;line-height:1.4}
.rv .tag{font-family:var(--mono);font-size:12px;padding:2px 8px;border-radius:6px;margin-right:6px}
.rv.ok .tag{background:var(--ok-soft);color:var(--ok)}.rv.ko .tag{background:var(--bad-soft);color:var(--bad)}
.rv ul{list-style:none;margin:0 0 10px;padding:0;display:grid;gap:6px}
.rv li{padding:7px 10px;border-radius:9px;font-size:15px;color:var(--muted);background:var(--surface)}
.rv li.c{color:var(--text);background:var(--ok-soft);outline:1px solid color-mix(in srgb,var(--ok) 45%,transparent)}
.rv li.w{color:var(--text);background:var(--bad-soft);outline:1px solid color-mix(in srgb,var(--bad) 45%,transparent);text-decoration:line-through;text-decoration-color:var(--bad)}
.rv li.c::before{content:"✓ ";color:var(--ok);font-weight:700}
.rv li.w::before{content:"✗ ";color:var(--bad);font-weight:700}
.rv .exp{font-size:15px;color:var(--muted);margin:0;padding-left:12px;border-left:2px solid var(--red-line)}
.best{font-size:14px;color:var(--faint);margin-top:10px}

/* ---------- certificado ---------- */
dialog{border:0;padding:0;background:transparent;max-width:min(980px,96vw);width:100%;color:var(--text)}
dialog::backdrop{background:rgba(0,0,0,.72);backdrop-filter:blur(3px)}
.dlg{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px}
.dlg-h{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px}
.dlg-h h3{margin:0;font-family:var(--font-c);font-size:22px}
.field{display:grid;gap:6px;margin-bottom:14px}
.field input{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:11px 12px;color:var(--text);font:inherit}
.field input:focus{outline:2px solid var(--red);border-color:transparent}
.cert{background:#fff;color:#141416;border-radius:6px;aspect-ratio:1.414/1;width:100%;position:relative;overflow:hidden;font-family:var(--font);container-type:inline-size}
.cert-in{position:absolute;inset:3.2cqw;border:.35cqw solid #141416;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:4cqw}
.cert-in::before{content:"";position:absolute;inset:.9cqw;border:.12cqw solid #e30613}
.cert .c-band{position:absolute;left:0;top:0;bottom:0;width:2.2cqw;background:#e30613}
.cert .c-k{font-family:var(--font-c);letter-spacing:.35em;text-transform:uppercase;font-size:1.6cqw;color:#e30613;font-weight:600}
.cert .c-t{font-family:var(--font-c);font-size:5.4cqw;font-weight:700;margin:.6cqw 0 1.6cqw;line-height:1}
.cert .c-s{font-size:1.6cqw;color:#55555f}
.cert .c-n{font-family:var(--font-c);font-size:4.2cqw;font-weight:600;border-bottom:.15cqw solid #141416;padding:0 3cqw .4cqw;margin:1.2cqw 0 1.4cqw;min-width:50%}
.cert .c-p{font-size:1.75cqw;max-width:78%;line-height:1.45}
.cert .c-p b{color:#e30613}
.cert .c-f{display:flex;justify-content:space-between;width:84%;margin-top:3cqw;font-size:1.35cqw;color:#55555f}
.cert .c-f div{border-top:.12cqw solid #8a8a93;padding-top:.6cqw;min-width:30%}
.cert .c-code{position:absolute;right:2.2cqw;bottom:1.4cqw;font-family:var(--mono);font-size:1.05cqw;color:#8a8a93}

/* ---------- navegación entre píldoras y pie ---------- */
.pillnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:48px}
.pillnav a{display:block;text-decoration:none;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px}
.pillnav a:hover{border-color:var(--red-line)}
.pillnav small{display:block;color:var(--faint);font-family:var(--font-c);text-transform:uppercase;letter-spacing:.12em;font-size:12.5px}
.pillnav .next{text-align:right}
footer{border-top:1px solid var(--line);color:var(--faint);font-size:13.5px}
footer .in{max-width:var(--maxw);margin:0 auto;padding:22px 16px 36px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}

/* lightbox */
.lb{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.88);display:none;align-items:center;justify-content:center;padding:20px;cursor:zoom-out}
.lb.open{display:flex}
.lb img{max-width:96vw;max-height:92vh;background:#fff;border-radius:8px;padding:6px}

.mob-toc{display:none}
.reveal{animation:rv .45s ease both}
@keyframes rv{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

@media (max-width:980px){
  .wrap{grid-template-columns:1fr;gap:0}
  .toc{display:none}
  .mob-toc{display:block;margin-bottom:24px}
  .mob-toc details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 16px}
  .mob-toc summary{font-family:var(--font-c);text-transform:uppercase;letter-spacing:.1em;font-weight:600;cursor:pointer}
  .mob-toc ol{margin:10px 0 0;padding-left:22px}
  .mob-toc li{margin:6px 0}
  .mob-toc a{color:var(--text);text-decoration:none}
  .hero-in{grid-template-columns:1fr}
  .bignum{position:absolute;right:12px;top:18px;font-size:96px;opacity:.35}
}
@media (max-width:640px){
  body{font-size:16px}
  .hero-in{padding:38px 16px 30px}
  .card,.quiz-card{padding:18px}
  .objectives{grid-template-columns:1fr}
  .quiz-intro,.result{grid-template-columns:1fr}
  .ring{margin:0 auto}
  .d-row{grid-template-columns:1fr;gap:4px}
  .d-sats{grid-template-columns:1fr 1fr}
  .d-sats span::before{display:none}
  .bars .bar{grid-template-columns:1fr 46px;gap:4px 10px}
  .bars .bar-l{grid-column:1/-1}
  .pillnav{grid-template-columns:1fr}
  .brand-txt span{display:none}
  p:has(> img.zoom ~ img.zoom) img.zoom{max-width:100%!important}
  table.gallery,table.gallery tbody,table.gallery thead,table.gallery tr,table.gallery td,table.gallery th{display:block;width:100%}
}
@media print{
  :root{--bg:#fff;--surface:#fff;--surface-2:#f6f6f6;--text:#000;--muted:#333;--line:#ccc}
  body.printing-cert>*:not(dialog){display:none!important}
  body.printing-cert dialog{position:static;max-width:none}
  body.printing-cert .dlg{border:0;padding:0;background:#fff}
  body.printing-cert .dlg>*:not(.cert){display:none!important}
  .topbar,.toc,.mob-toc,.pillnav,.quiz,.lb{display:none!important}
  .wrap{display:block}
  @page{margin:10mm}
}
.hide-s{}@media (max-width:640px){.hide-s{display:none}}
.quiz-card{scroll-margin-top:84px}
.content .d-steps{padding:0;margin:0}
.content .d-steps li{margin:0}
dialog{max-height:94vh;overflow:auto}