:root{
  --primary:#2a82c6; --primary-d:#1b5f94; --on-primary:#fff;
  --primary-c:#d6e8f7; --on-primary-c:#0b3557;
  --tertiary:#7a5af5; --ok:#1e8a4c; --warn:#b26a00; --bad:#c0392b;
  --bg:#f7f9fc; --surface:#ffffff; --surface-2:#eef3f9; --line:#d9e2ec;
  --text:#1a2633; --muted:#5a6b7d; --code:#0d2236;
  --shadow:0 1px 2px rgba(16,40,70,.08),0 4px 14px rgba(16,40,70,.06);
  --r:16px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --primary:#6fb3ea; --primary-d:#9ccbf2; --on-primary:#06223a;
    --primary-c:#173b5a; --on-primary-c:#d6e8f7;
    --bg:#0e141b; --surface:#151d26; --surface-2:#1c2632; --line:#2a3644;
    --text:#e4ebf2; --muted:#9aabbd; --code:#e4ebf2;
    --shadow:0 1px 2px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"]{
  --primary:#6fb3ea; --primary-d:#9ccbf2; --on-primary:#06223a;
  --primary-c:#173b5a; --on-primary-c:#d6e8f7;
  --bg:#0e141b; --surface:#151d26; --surface-2:#1c2632; --line:#2a3644;
  --text:#e4ebf2; --muted:#9aabbd; --code:#e4ebf2;
  --shadow:0 1px 2px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 "Segoe UI",Roboto,system-ui,-apple-system,sans-serif}
a{color:var(--primary)}
img{max-width:100%}
code{font-family:ui-monospace,Consolas,monospace;background:var(--surface-2);padding:.1em .4em;border-radius:6px;font-size:.92em}

/* Barra superior */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:16px;padding:10px 20px;background:var(--surface);border-bottom:1px solid var(--line)}
.logos{display:flex;align-items:center;gap:12px;background:#fff;border-radius:12px;padding:5px 12px;border:1px solid var(--line)}
.logos img{height:46px;width:auto;object-fit:contain;image-rendering:auto}
.logos .sep{width:1px;height:32px;background:var(--line)}
.brand{display:flex;flex-direction:column;line-height:1.2;margin-left:6px}
.brand small{color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em}
.brand b{font-size:1.05rem}
.top-actions{margin-left:auto;display:flex;gap:8px}
.icon-btn{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;height:40px;min-width:40px;padding:0 12px;cursor:pointer;font-size:.9rem}
.icon-btn:hover{background:var(--surface-2)}
#menuBtn{display:none}

/* Layout */
.layout{display:grid;grid-template-columns:260px minmax(0,1fr) 220px;max-width:1440px;margin:0 auto}
.drawer{position:sticky;top:61px;height:calc(100vh - 61px);overflow:auto;padding:20px 12px;border-right:1px solid var(--line)}
.drawer h4{margin:18px 12px 6px;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.drawer a{display:block;padding:8px 14px;border-radius:999px;text-decoration:none;color:var(--text);font-size:.93rem}
.drawer a:hover{background:var(--surface-2)}
.drawer a.active{background:var(--primary-c);color:var(--on-primary-c);font-weight:600}
main{padding:28px 40px 60px;min-width:0}
.toc{position:sticky;top:61px;height:calc(100vh - 61px);padding:28px 16px;font-size:.88rem}
.toc b{display:block;margin-bottom:8px;color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em}
.toc a{display:block;padding:4px 10px;border-left:2px solid var(--line);color:var(--muted);text-decoration:none}
.toc a.active{border-color:var(--primary);color:var(--primary);font-weight:600}

.crumb{color:var(--muted);font-size:.85rem}
h1{font-size:2.4rem;line-height:1.15;margin:.2em 0 .3em}
h2{font-size:1.65rem;margin:2.2em 0 .5em;padding-top:.2em}
h3{font-size:1.2rem;margin:1.6em 0 .4em}
.lead{font-size:1.12rem;color:var(--muted);max-width:760px}

/* Slider */
.slider{position:relative;border-radius:24px;overflow:hidden;margin:26px 0;box-shadow:var(--shadow);aspect-ratio:21/8;min-height:300px}
.track{display:flex;height:100%;transition:transform .6s cubic-bezier(.2,0,0,1)}
.slide{flex:0 0 100%;position:relative;display:flex;align-items:center;padding:40px 56px;color:#fff;overflow:hidden}
.slide .txt{position:relative;z-index:2;max-width:560px}
.slide .tag{display:inline-block;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;background:rgba(255,255,255,.18);padding:4px 10px;border-radius:999px}
.slide h2{margin:.4em 0 .3em;font-size:2rem;color:#fff;padding:0}
.slide p{margin:0 0 1em;opacity:.92}
.slide .cta{display:inline-block;background:#fff;color:#0b3557;padding:10px 20px;border-radius:999px;font-weight:600;text-decoration:none}
.s1{background:linear-gradient(120deg,#0b3557,#2a82c6)}
.s2{background:linear-gradient(120deg,#2b1a5e,#7a5af5)}
.s3{background:linear-gradient(120deg,#0f3d2a,#1e8a4c)}
.chipart{position:absolute;right:40px;top:50%;transform:translateY(-50%);width:44%;max-width:460px;opacity:.95;z-index:1}
.arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.85);color:#0b3557;font-size:1.6rem;cursor:pointer;z-index:3}
.arrow.prev{left:12px}.arrow.next{right:12px}
.dots{position:absolute;bottom:14px;left:0;right:0;display:flex;justify-content:center;gap:8px;z-index:3}
.dots button{width:10px;height:10px;border-radius:999px;border:0;background:rgba(255,255,255,.5);cursor:pointer;transition:width .3s}
.dots button.on{width:28px;background:#fff}
.caption{font-size:.8rem;color:var(--muted);margin-top:-14px}

.slide .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.slide .shade{position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(6,20,35,.88) 0%,rgba(6,20,35,.55) 55%,rgba(6,20,35,.15) 100%);display:none}
.slide.has-img .shade{display:block}.slide.has-img .chipart{display:none}
figure.photo{margin:18px 0}figure.photo img{width:100%;border-radius:var(--r);display:block;aspect-ratio:16/9;object-fit:cover;background:var(--surface-2)}
figure.photo figcaption{font-size:.8rem;color:var(--muted);margin-top:6px}
.video{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);background:#000;margin:16px 0}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
/* Componentes */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin:18px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.card h3{margin:.2em 0 .4em}
.card p{margin:.3em 0;color:var(--muted);font-size:.95rem}
.card .big{font-size:2rem;font-weight:700;color:var(--primary)}
.note{border-radius:var(--r);padding:16px 20px;margin:18px 0;background:var(--primary-c);color:var(--on-primary-c);border-left:5px solid var(--primary)}
.note.warn{background:#fff3e0;color:#5c3700;border-color:var(--warn)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .note.warn{background:#3a2a10;color:#ffe2b8}}
:root[data-theme="dark"] .note.warn{background:#3a2a10;color:#ffe2b8}
.note h4{margin:0 0 .3em}
.note p{margin:.3em 0}
.anatomy{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:16px 0}
.anatomy div{background:var(--surface-2);border-radius:12px;padding:14px}
.anatomy b{display:block;color:var(--primary)}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);margin:16px 0}
table{border-collapse:collapse;width:100%;min-width:720px;font-size:.92rem}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--surface-2);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
tr:last-child td{border-bottom:0}
tr.hl td{background:var(--primary-c);color:var(--on-primary-c)}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;font-weight:600}
.p-hist{background:#e6e6e6;color:#444}.p-vig{background:#d6f0e0;color:#14532d}.p-nuevo{background:#e7defd;color:#3b2490}.p-esp{background:#fde9cf;color:#6b3a00}

/* Línea de tiempo */
.timeline{display:flex;gap:0;overflow-x:auto;padding:8px 0 4px;margin:18px 0}
.tl{flex:1 0 140px;position:relative;padding-top:26px;text-align:center}
.tl:before{content:"";position:absolute;top:9px;left:0;right:0;height:3px;background:var(--line)}
.tl:after{content:"";position:absolute;top:2px;left:50%;transform:translateX(-50%);width:17px;height:17px;border-radius:50%;background:var(--primary);border:3px solid var(--surface)}
.tl b{display:block}.tl span{font-size:.82rem;color:var(--muted)}

/* Perfiles (pestañas) */
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-top:16px}
.tabs button{border:0;background:none;color:var(--muted);padding:10px 16px;font:inherit;font-weight:600;cursor:pointer;border-bottom:3px solid transparent}
.tabs button.on{color:var(--primary);border-color:var(--primary)}
.panel{display:none;background:var(--surface);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);padding:22px}
.panel.on{display:block}
.reco{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:12px 0}
.reco div{background:var(--surface-2);border-radius:12px;padding:12px}
.reco small{display:block;color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em}
.reco b{font-size:1.15rem}

/* Calculadora */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);margin:18px 0}
.calc .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.calc label{font-size:.85rem;color:var(--muted);display:block;margin-bottom:6px}
.calc select,.calc input[type=range]{width:100%}
.calc select{padding:10px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);color:var(--text);font:inherit}
.result{margin-top:18px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.result .val{font-size:2.6rem;font-weight:800;color:var(--primary)}
.bar{height:12px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin-top:10px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--tertiary));width:0;transition:width .5s}
.formula{font-family:ui-monospace,Consolas,monospace;font-size:.88rem;color:var(--muted);margin-top:8px}

/* Debate */
.versus{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.versus .card ul{margin:.4em 0;padding-left:1.2em}

/* Quiz */
.quiz .q{margin:14px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.quiz .opts{display:grid;gap:8px;margin-top:10px}
.quiz .opts button{text-align:left;padding:10px 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);color:var(--text);font:inherit;cursor:pointer}
.quiz .opts button.right{background:#d6f0e0;border-color:var(--ok);color:#14532d}
.quiz .opts button.wrong{background:#fde2df;border-color:var(--bad);color:#7a1d12}
.quiz .fb{margin-top:8px;font-size:.92rem;color:var(--muted);display:none}

.pager{display:flex;justify-content:space-between;gap:12px;margin-top:40px}
.pager a{flex:1;border:1px solid var(--line);border-radius:var(--r);padding:14px 18px;text-decoration:none;background:var(--surface)}
.pager small{display:block;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:22px;text-align:center;color:var(--muted);font-size:.88rem}

@media (max-width:1180px){.layout{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}}
@media (max-width:860px){
  .layout{grid-template-columns:1fr}
  #menuBtn{display:inline-block}
  .drawer{position:fixed;left:0;top:61px;width:280px;background:var(--surface);z-index:30;transform:translateX(-100%);transition:transform .3s;box-shadow:var(--shadow)}
  .drawer.open{transform:none}
  main{padding:20px 16px 48px}
  h1{font-size:1.8rem}
  .brand{display:none}
  .logos img{height:40px}
  .logos{padding:4px 8px;gap:8px}
  .slider{aspect-ratio:auto;min-height:380px}
  .slide{padding:28px 24px 48px;align-items:flex-start}
  .slide h2{font-size:1.45rem}
  .chipart{opacity:.18;width:80%;right:-10%}
  .versus{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){.track,.bar i{transition:none}}

/* Galería de fotos reales y logos */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin:16px 0}
.gallery figure{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#fff;display:block}
.gallery figcaption{padding:10px 12px;font-size:.85rem;line-height:1.4}
.gallery figcaption b{display:block;font-size:.95rem}
.gallery figcaption small{color:var(--muted);font-size:.72rem}
.gallery.wide img{aspect-ratio:4/3;object-fit:contain;background:#f3f5f8}
td.thumb{width:110px}
td.thumb img{width:100px;height:56px;object-fit:contain;background:#fff;border-radius:6px;border:1px solid var(--line);display:block}
.logo-wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin:16px 0}
.logo-wall figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 10px 8px;display:flex;flex-direction:column;align-items:center;gap:8px;min-height:110px;justify-content:space-between}
.logo-wall img{max-width:100%;max-height:46px;object-fit:contain}
.logo-wall figcaption{font-size:.74rem;color:#4a5866;text-align:center;line-height:1.3}
.logo-wall .txtlogo{font-weight:800;font-size:1.15rem;color:#1a2633;letter-spacing:.02em;height:46px;display:flex;align-items:center}
.brand-logo{height:28px;max-width:130px;object-fit:contain;background:#fff;border-radius:6px;padding:3px 6px}
.credit{font-size:.72rem;color:var(--muted)}

.brand-logo{width:auto;max-height:32px;height:auto}