:root{
  --negro:#0b0b0c; --azabache:#121214; --oro:#D4AF37; --oro2:#E3C979; --crema:#f6efdf; --papel:#fbf6ea;
  --tinta:#2a2620; --tinta2:#5b5347; --marino:#17293C; --madera:#2a1d14; --madera2:#3a2819;
  --hoja-w:440px; --hoja-h:620px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--negro);color:#eee;font-family:'Poppins',system-ui,sans-serif}
button{font-family:inherit;cursor:pointer}
[hidden]{display:none!important}

/* ---------------- BIBLIOTECA ---------------- */
#biblioteca{min-height:100vh;background:
  radial-gradient(1200px 500px at 50% -120px,rgba(212,175,55,.13),transparent 70%),
  linear-gradient(#0d0c0b,#070707)}
.bib-top{display:flex;justify-content:space-between;align-items:center;padding:18px clamp(16px,4vw,48px)}
.bib-marca{display:flex;gap:12px;align-items:center}
.bib-marca img{width:34px;height:34px;object-fit:contain}
.bib-marca b{display:block;letter-spacing:4px;font-size:.95rem;color:var(--oro2)}
.bib-marca span{font-size:.72rem;color:#9a9286;letter-spacing:1px}
.bib-nota{font-size:.7rem;color:#8a6f2a;border:1px dashed #8a6f2a;border-radius:20px;padding:4px 12px}
.bib-hero{text-align:center;max-width:760px;margin:18px auto 30px;padding:0 16px}
.bib-hero .k{color:var(--oro);letter-spacing:5px;font-size:.72rem;text-transform:uppercase}
.bib-hero h1{font-family:'Cormorant Garamond',serif;font-weight:600;font-size:clamp(2rem,5vw,3.2rem);margin:.25em 0;color:#f3ead4}
.bib-hero p{color:#b9b0a1;line-height:1.7;font-size:.95rem}
.bib-leyenda{display:flex;gap:18px;justify-content:center;font-size:.75rem;color:#a39a8b;margin-top:10px;flex-wrap:wrap}
.pt{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:6px;vertical-align:middle}
.pt.ok{background:var(--oro)} .pt.pend{background:#555} .pt.hecho{background:#5fbf7a}

.estante{max-width:1180px;margin:0 auto 56px;padding:0 clamp(12px,3vw,32px)}
.est-cab{display:flex;align-items:baseline;gap:14px;margin:0 6px 10px;flex-wrap:wrap}
.est-cab .cod{font-size:.7rem;letter-spacing:3px;color:var(--oro);border:1px solid rgba(212,175,55,.4);border-radius:4px;padding:2px 7px}
.est-cab h2{font-family:'Cormorant Garamond',serif;font-size:1.8rem;margin:0;color:#f1e7cf;font-weight:600}
.est-cab .lema{color:#9d9483;font-size:.85rem}
.est-cab .cnt{margin-left:auto;font-size:.75rem;color:#8d8576}
.repisa{position:relative;display:flex;align-items:flex-end;gap:14px;padding:26px 22px 0;min-height:300px;
  overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;
  background:linear-gradient(180deg,rgba(0,0,0,.55),rgba(0,0,0,.15) 60%,transparent),
             repeating-linear-gradient(90deg,#1b130d 0 3px,#20160f 3px 7px);
  border-radius:6px 6px 0 0;box-shadow:inset 0 14px 30px rgba(0,0,0,.6)}
.tabla-madera{height:22px;border-radius:0 0 6px 6px;
  background:linear-gradient(#5b3f27,#3b2817 40%,#24180e);box-shadow:0 14px 26px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,220,160,.25)}

/* un libro de pie en la repisa */
.tomo{flex:0 0 auto;position:relative;width:80px;height:262px;border:none;padding:0;background:none;
  transform-origin:bottom center;transition:transform .35s cubic-bezier(.2,.8,.2,1);margin-bottom:0}
.tomo:hover,.tomo:focus-visible{transform:translateY(-16px) rotate(-1.5deg);outline:none}
.tomo .lomo{position:absolute;inset:0;border-radius:3px 3px 1px 1px;overflow:hidden;
  background:linear-gradient(90deg,rgba(0,0,0,.45),rgba(255,255,255,.08) 18%,rgba(0,0,0,0) 40%,rgba(0,0,0,.35)),var(--c,#17293C);
  box-shadow:3px 0 0 rgba(0,0,0,.35),0 10px 18px rgba(0,0,0,.5);display:flex;flex-direction:column;align-items:center;padding:12px 6px}
.tomo .banda{width:100%;height:2px;background:var(--oro);opacity:.8;margin:6px 0}
.tomo .num{font-family:'Cormorant Garamond',serif;color:var(--oro2);font-size:1.05rem;font-weight:700;letter-spacing:1px}
.tomo .cod{font-size:.55rem;color:#e7d7a8;letter-spacing:2px}
.tomo .tit{flex:1;writing-mode:vertical-rl;transform:rotate(180deg);color:#f3e8cc;font-family:'Cormorant Garamond',serif;
  font-size:.9rem;font-weight:600;line-height:1.08;text-align:center;padding:6px 0;overflow:hidden;min-height:0;align-self:stretch;width:auto}
.tomo img{width:26px;opacity:.9}
.tomo.pend .lomo{filter:saturate(.25) brightness(.62)}
.tomo .cinta{flex:0 0 auto;align-self:stretch;margin:6px -6px 0;background:#2b2b2b;color:#cfc6b3;font-size:.5rem;letter-spacing:1px;line-height:1.25;
  text-align:center;padding:3px 2px;box-shadow:0 2px 6px rgba(0,0,0,.6);text-transform:uppercase;white-space:normal}
.tomo .avance{position:absolute;bottom:0;left:0;height:4px;background:#5fbf7a}
.tomo.hecho::after{content:'✔';position:absolute;top:-10px;right:-8px;background:#5fbf7a;color:#0b2414;width:22px;height:22px;border-radius:50%;
  font-size:.75rem;display:grid;place-items:center;font-weight:700}
.tomo.final{width:96px}
.tomo.final .lomo{background:linear-gradient(90deg,rgba(0,0,0,.45),rgba(255,255,255,.1) 18%,transparent 40%,rgba(0,0,0,.35)),#0f0f10;border:1px solid rgba(212,175,55,.6)}
.etq{position:absolute;bottom:-34px;left:50%;transform:translateX(-50%);white-space:nowrap;font-size:.62rem;color:#8d8576;pointer-events:none;opacity:0;transition:.2s}
.tomo:hover .etq{opacity:1}

/* libro que vuela al centro */
#vuelo{position:fixed;z-index:50;pointer-events:none;transition:all .55s cubic-bezier(.2,.8,.2,1);perspective:1600px}
#vuelo .tapa{position:absolute;inset:0;border-radius:3px 8px 8px 3px;transform-origin:left center;transition:transform .7s ease .45s;
  background:var(--marino);box-shadow:0 30px 60px rgba(0,0,0,.6)}

/* ---------------- LECTOR ---------------- */
#lector{position:fixed;inset:0;display:flex;flex-direction:column;background:
  radial-gradient(900px 600px at 50% 40%,#2a1f15,#0c0907 75%);z-index:20}
.lec-barra{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid rgba(212,175,55,.15);background:rgba(0,0,0,.35)}
.lec-titulo{flex:1;min-width:0;text-align:center;font-size:.82rem;line-height:1.3;color:#d8cba9;letter-spacing:.5px}
.lec-btn{background:transparent;color:#e8dcbc;border:1px solid rgba(212,175,55,.35);border-radius:8px;padding:6px 12px;font-size:.8rem}
.lec-btn:hover{border-color:var(--oro);color:var(--oro2)}
.lec-escena{flex:1;display:grid;place-items:center;perspective:2400px;overflow:hidden;padding:10px}
.libro{position:relative;display:flex;width:calc(var(--hoja-w)*2);height:var(--hoja-h);
  filter:drop-shadow(0 30px 40px rgba(0,0,0,.6))}
.libro.una{width:var(--hoja-w)}
.libro.una .izq,.libro.una .lomo-centro{display:none}
.hoja{position:relative;width:var(--hoja-w);height:var(--hoja-h);overflow:hidden;
  background:var(--papel)}
.hoja.izq{border-radius:6px 0 0 6px;background:linear-gradient(90deg,#efe6d2,var(--papel) 6%,var(--papel) 92%,#e4d8bd)}
.hoja.der{border-radius:0 6px 6px 0;background:linear-gradient(90deg,#e4d8bd,var(--papel) 8%,var(--papel) 94%,#efe6d2)}
.libro.una .hoja.der{border-radius:6px;background:linear-gradient(90deg,#e7dcc3,var(--papel) 5%,var(--papel) 95%,#efe6d2)}
.hoja.vacia{background:transparent!important}
.lomo-centro{position:absolute;left:calc(50% - 14px);top:0;bottom:0;width:28px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(0,0,0,.18) 45%,rgba(0,0,0,.28) 50%,rgba(0,0,0,.18) 55%,transparent)}

/* la hoja que gira */
.hoja-giro{position:absolute;top:0;width:var(--hoja-w);height:var(--hoja-h);transform-style:preserve-3d;z-index:5;
  transition:transform .75s cubic-bezier(.45,.05,.3,1)}
.hoja-giro .cara{position:absolute;inset:0;backface-visibility:hidden;overflow:hidden;background:var(--papel)}
.hoja-giro .cara.atras{transform:rotateY(180deg)}
.hoja-giro .sombra{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,.25),transparent 30%);opacity:0;transition:opacity .75s}

/* contenido de una página */
.pg{position:absolute;inset:0;padding:40px 52px 46px;display:flex;flex-direction:column;color:var(--tinta);
  font-family:'Literata',Georgia,serif;font-size:14.2px;line-height:1.62}
.pg-cab{display:flex;justify-content:space-between;font-family:'Poppins',sans-serif;font-size:9.5px;letter-spacing:1.6px;color:#9c8a5f;
  text-transform:uppercase;border-bottom:1px solid rgba(156,138,95,.35);padding-bottom:6px;margin-bottom:14px;gap:14px;align-items:flex-end;line-height:13px;height:26px;box-sizing:content-box;flex:0 0 auto;overflow:hidden}
.pg-cab span:first-child{white-space:nowrap;flex:0 0 auto}
.pg-cab span:last-child{min-width:0}
.pg-cab span:last-child{text-align:right}
.pg-cuerpo{flex:1;overflow:hidden;position:relative}
.pg-pie{text-align:center;font-family:'Cormorant Garamond',serif;font-size:13px;color:#8f7d55;margin-top:8px}
.pg-cuerpo.desborda{overflow:auto}
.pg p{margin:0 0 .75em;text-align:justify;hyphens:auto;overflow-wrap:break-word}
.pg-cuerpo{overflow-wrap:break-word}
.pg h2{font-family:'Cormorant Garamond',serif;font-size:1.75rem;line-height:1.1;margin:.1em 0 .45em;color:#1d2a39;font-weight:700}
.pg h3{font-family:'Poppins',sans-serif;font-size:.86rem;letter-spacing:.5px;margin:1.1em 0 .45em;color:#1d2a39;font-weight:600}
.pg .lec-k{font-family:'Poppins',sans-serif;font-size:.68rem;letter-spacing:3px;color:#a8873a;text-transform:uppercase;margin-bottom:2px}
.pg ul,.pg ol{margin:0 0 .8em;padding-left:1.25em}
.pg li{margin-bottom:.3em}
.pg ul li::marker{color:#b08f3c}
.pg table{width:100%;table-layout:fixed;overflow-wrap:anywhere;border-collapse:collapse;font-family:'Poppins',sans-serif;font-size:11.2px;line-height:1.45;margin:.2em 0 1em}
.pg th{background:#1d2a39;color:#f2e6c4;text-align:left;font-weight:600;padding:6px 7px}
.pg td{border-bottom:1px solid #e1d6bd;padding:6px 7px;vertical-align:top}
.pg tr:nth-child(even) td{background:rgba(214,196,150,.12)}
.nota{border-left:3px solid #b08f3c;background:rgba(212,175,55,.09);padding:9px 12px;margin:0 0 1em;border-radius:0 6px 6px 0}
.nota .nk{font-family:'Poppins',sans-serif;font-size:.62rem;letter-spacing:2.5px;color:#9a7a2f;text-transform:uppercase;font-weight:600}
.nota .nt{font-weight:600;color:#1d2a39;margin:2px 0 4px}
.nota p:last-child{margin-bottom:0}
.nota.error{border-color:#b6553f;background:rgba(182,85,63,.08)} .nota.error .nk{color:#a2452f}
.nota.ejemplo{border-color:#3f6f8f;background:rgba(63,111,143,.08)} .nota.ejemplo .nk{color:#2f5e7e}
.nota.aplicacion,.nota.ejecuta{border-color:#4d8a5d;background:rgba(77,138,93,.09)} .nota.aplicacion .nk,.nota.ejecuta .nk{color:#3c7a4c}
.nota.numero{border-color:#1d2a39;background:rgba(29,42,57,.07)} .nota.numero .nk{color:#1d2a39}
.dialogo{margin:0 0 1em;font-size:.95em}
.dialogo div{margin-bottom:.45em} .dialogo b{font-family:'Poppins',sans-serif;font-size:.78em;color:#1d2a39;letter-spacing:.3px}
.pg .ejer{border:1px dashed #b08f3c;border-radius:8px;padding:10px 10px 4px;margin:0 0 1em;background:rgba(255,255,255,.55)}
.pg .ejer .ek{font-family:'Poppins',sans-serif;font-size:.62rem;letter-spacing:2.5px;color:#3c7a4c;text-transform:uppercase;font-weight:600}
.pg .ejer textarea,.pg textarea.abierta{width:100%;min-height:38px;border:1px solid #d9cba8;border-radius:5px;background:#fffdf7;
  font-family:'Literata',serif;font-size:12px;padding:4px 6px;resize:vertical;color:var(--tinta);min-width:0;display:block}
.pg .ejer td.fija{font-weight:600;color:#1d2a39;width:34%}
.guardado{font-family:'Poppins',sans-serif;font-size:.6rem;color:#4d8a5d;margin:-6px 0 8px;text-align:right}

/* portada, portadillas */
.pg.portada{padding:0;background:var(--marino);color:#f1e4bf;font-family:'Poppins',sans-serif;align-items:center;justify-content:center;text-align:center}
.pg.portada::before,.pg.portada::after{content:'';position:absolute;width:0;height:0;border-style:solid}
.pg.portada::before{top:0;right:0;border-width:0 120px 120px 0;border-color:transparent #0e1a27 transparent transparent}
.pg.portada::after{bottom:0;left:0;border-width:120px 0 0 120px;border-color:transparent transparent transparent #0e1a27}
.portada .marco{position:absolute;inset:18px;border:1px solid rgba(212,175,55,.55)}
.portada img{width:150px;margin-bottom:26px;filter:drop-shadow(0 4px 10px rgba(0,0,0,.4))}
.portada .k{letter-spacing:5px;font-size:.66rem;color:var(--oro)}
.portada h1{font-family:'Cormorant Garamond',serif;font-size:2.3rem;font-weight:700;line-height:1.05;margin:.3em 26px;color:#f6ecd0}
.portada .sub{font-size:.8rem;color:#cdbf98;margin:0 40px;line-height:1.6}
.portada .tomo-n{margin-top:26px;font-family:'Cormorant Garamond',serif;font-size:1.2rem;color:var(--oro2);letter-spacing:2px}
.portada .pie{position:absolute;bottom:34px;left:0;right:0;font-size:.62rem;letter-spacing:2px;color:#a89a74}
.portadilla{justify-content:center;text-align:center}
.portadilla .cod{font-family:'Poppins',sans-serif;letter-spacing:5px;font-size:.75rem;color:#a8873a}
.portadilla h2{font-size:2.3rem!important;margin:.25em 0!important}
.portadilla .sub{font-style:italic;color:var(--tinta2);margin:0 10px}
.portadilla .orn{color:#b08f3c;margin:22px 0;letter-spacing:8px}
.sello-pend{display:inline-block;margin-top:18px;border:2px solid #8a7a58;color:#8a7a58;border-radius:6px;padding:4px 14px;
  font-family:'Poppins',sans-serif;font-size:.7rem;letter-spacing:3px;transform:rotate(-4deg)}
.toc a{display:flex;gap:6px;color:var(--tinta);text-decoration:none;padding:3px 0;cursor:pointer}
.toc a .pts{flex:1;border-bottom:1px dotted #bfae86;transform:translateY(-4px)}
.toc a.m{font-weight:600;color:#1d2a39;margin-top:8px}
.toc a.s{padding-left:14px;font-size:.93em}
.toc a .tn{white-space:nowrap;min-width:2.2em;text-align:right}
.toc a.off{color:#9a907d;cursor:default}

/* evaluación */
.reac{margin:0 0 .9em;font-size:.95em}
.reac .q{font-weight:600;color:#1d2a39;margin-bottom:4px}
.reac label{display:flex;gap:7px;align-items:flex-start;padding:3px 6px;border-radius:5px;cursor:pointer;font-size:.95em}
.reac label:hover{background:rgba(212,175,55,.12)}
.reac input{margin-top:5px;accent-color:#1d2a39}
.reac.bien .q::after{content:' ✔';color:#3c7a4c}
.reac.mal .q::after{content:' ✘';color:#a2452f}
.reac label.correcta{background:rgba(77,138,93,.18)}
.calif{border:1px solid #1d2a39;border-radius:10px;padding:12px;text-align:center;font-family:'Poppins',sans-serif;background:#fff9ea}
.calif button{background:#1d2a39;color:#f2e6c4;border:none;border-radius:8px;padding:9px 18px;font-size:.8rem}
.calif .res{margin-top:10px;font-size:.82rem;color:var(--tinta)}
.calif .res b{font-size:1.5rem;display:block;color:#1d2a39}
.candado{opacity:.6}

/* pie del lector */
.lec-pie{display:flex;align-items:center;gap:14px;padding:10px 16px 14px;justify-content:center}
.lec-flecha{width:44px;height:44px;border-radius:50%;border:1px solid rgba(212,175,55,.4);background:rgba(0,0,0,.3);color:var(--oro2);font-size:1.6rem;line-height:1}
.lec-flecha:disabled{opacity:.25;cursor:default}
.lec-avance{width:min(420px,60vw);text-align:center;font-size:.72rem;color:#bfb293}
.lec-track{height:3px;background:rgba(255,255,255,.12);border-radius:3px;margin-bottom:6px;overflow:hidden}
.lec-fill{height:100%;background:var(--oro);width:0;transition:width .4s}
#panel-indice{position:absolute;top:0;right:0;bottom:0;width:min(380px,92vw);background:#16120e;border-left:1px solid rgba(212,175,55,.25);
  z-index:30;display:flex;flex-direction:column;box-shadow:-20px 0 40px rgba(0,0,0,.5)}
.pi-cab{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid rgba(212,175,55,.15);color:var(--oro2)}
#pi-lista{overflow:auto;padding:8px 6px 30px}
#pi-lista a{display:flex;gap:8px;padding:8px 12px;color:#ddd2b6;text-decoration:none;font-size:.82rem;border-radius:6px;cursor:pointer}
#pi-lista a:hover{background:rgba(212,175,55,.1)}
#pi-lista a.m{color:var(--oro2);font-weight:600;margin-top:6px}
#pi-lista a.s{padding-left:24px;color:#b9ad90}
#pi-lista a span:last-child{margin-left:auto;color:#7f765f}

#medidor{position:absolute;left:-9999px;top:0;visibility:hidden}

@media (max-width:760px){
  .tomo{width:68px;height:232px}
  .tomo.final{width:80px}
  .repisa{min-height:252px;padding:22px 14px 0;gap:10px}
  .est-cab h2{font-size:1.45rem}
  .pg{padding:30px 30px 34px;font-size:14px}
  .lec-titulo{font-size:.68rem;letter-spacing:.2px}
  .lec-titulo .lt-car{display:none}
}

.ejer-fila{border-bottom:1px solid #e1d6bd;padding:6px 0}
.ejer-fila:last-child{border-bottom:none}
.ef-dato,.ef-campo{display:block;font-family:'Poppins',sans-serif;font-size:11.5px;margin:3px 0}
.ef-dato span,.ef-campo span{display:block;font-size:9.5px;letter-spacing:1px;text-transform:uppercase;color:#9a7a2f}
.ef-dato{font-weight:600;color:#1d2a39}
.tabla-tj{margin:.2em 0 1em;border-top:2px solid #1d2a39}
.tabla-tj .ef-dato{font-weight:400;color:var(--tinta)}
.tabla-tj .ef-tit,.ejer .ef-tit{font-weight:600;color:#1d2a39}

/* ---------- en vivo: cuenta, avisos y carga ---------- */
#ia-cuenta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.ia-volver{font-size:.78rem;color:#d8cba9;text-decoration:none;border:1px solid rgba(212,175,55,.35);border-radius:20px;padding:6px 14px}
.ia-volver:hover{border-color:var(--oro2);color:var(--oro2)}
.ia-plan{font-size:.68rem;letter-spacing:1.5px;text-transform:uppercase;color:#9a9286}
.ia-cta{font-family:'Poppins',sans-serif;font-size:.82rem;font-weight:600;background:var(--oro2);color:#17120a;border:none;border-radius:22px;padding:8px 18px;cursor:pointer}
#ia-aviso{position:fixed;inset:0;z-index:80;background:rgba(5,4,3,.72);display:grid;place-items:center;padding:16px}
#ia-aviso[hidden],#ia-cargando[hidden]{display:none!important}
.ia-av-caja{max-width:420px;width:100%;background:#16120d;border:1px solid rgba(212,175,55,.4);border-radius:14px;padding:26px 24px;box-shadow:0 30px 70px rgba(0,0,0,.6)}
.ia-av-caja h3{font-family:'Cormorant Garamond',serif;font-size:1.55rem;color:#f3e8cc;margin:0 0 10px;line-height:1.15}
.ia-av-caja p{font-size:.88rem;color:#c9bea4;line-height:1.6;margin:0 0 18px}
#ia-aviso-bot{display:flex;gap:10px;flex-wrap:wrap}
.ia-av-btn{font-family:'Poppins',sans-serif;font-size:.82rem;font-weight:600;background:var(--oro2);color:#17120a;border:none;border-radius:22px;padding:9px 18px;cursor:pointer;text-decoration:none}
.ia-av-btn.sec{background:transparent;color:#d8cba9;border:1px solid rgba(212,175,55,.35)}
#ia-cargando{position:fixed;inset:0;z-index:70;background:rgba(5,4,3,.55);display:grid;place-items:center}
.ia-carga-caja{display:flex;flex-direction:column;align-items:center;gap:14px;color:#d8cba9;font-size:.85rem}
.ia-giro{width:38px;height:38px;border-radius:50%;border:3px solid rgba(212,175,55,.25);border-top-color:var(--oro2);animation:iaGiro 1s linear infinite}
@keyframes iaGiro{to{transform:rotate(360deg)}}