/* ============================================================
   Lecturas en el Perú — hoja de estilos
   Identidad editorial: papel cálido, tinta de imprenta, oro/teal/granate.
   Claro por defecto; oscuro con relieve real vía [data-theme="dark"].
   ============================================================ */
:root{
  /* Claro (por defecto) */
  --papel:#FBF8F1; --papel-2:#F4EFE3; --superficie:#FFFFFF;
  --tinta:#1C2A47; --texto:#2A2F38; --suave:#636A79;
  --ocre:#B07D1E; --oro-claro:#E7CE95; --verde:#2E6E68; --rosa:#A8445A;
  --linea:#E8E1D1; --enfasis:#F3EDDF;
  --sombra:0 1px 2px rgba(28,42,71,.05), 0 8px 24px rgba(28,42,71,.07);
  --sombra-alta:0 18px 50px rgba(28,42,71,.16);
  --anillo:var(--ocre);
  --serif:"Literata", Georgia, "Times New Roman", serif;
  --sans:"Archivo", "Helvetica Neue", Arial, sans-serif;
  --radio:14px; --radio-sm:9px; --max:1140px;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
:root[data-theme="dark"]{
  --papel:#0D1120; --papel-2:#0A0E1A; --superficie:#171E2F;
  --tinta:#EEF1F8; --texto:#CBD1DE; --suave:#95A0B4;
  --ocre:#E6B860; --oro-claro:#6b5a2e; --verde:#61B5AD; --rosa:#E08195;
  --linea:#29324A; --enfasis:#1D2639;
  --sombra:0 1px 2px rgba(0,0,0,.35), 0 10px 30px rgba(0,0,0,.40);
  --sombra-alta:0 22px 60px rgba(0,0,0,.60);
}

*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 76px);overflow-x:hidden}
.hero>*,.grid2>*,.grid3>*{min-width:0}
body{
  margin:0;color:var(--texto);font-family:var(--serif);font-size:1.0625rem;line-height:1.7;
  background:
    radial-gradient(1200px 520px at 82% -8%, color-mix(in srgb, var(--ocre) 12%, transparent), transparent 60%),
    linear-gradient(180deg, var(--papel) 0%, var(--papel) 60%, var(--papel-2) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--tinta);text-decoration-color:color-mix(in srgb, var(--ocre) 55%, transparent);text-underline-offset:3px}
a:hover{text-decoration-color:var(--ocre)}
:focus-visible{outline:3px solid var(--anillo);outline-offset:2px;border-radius:3px}
.saltar{position:absolute;left:-999px}
.saltar:focus{left:1rem;top:1rem;background:var(--superficie);padding:.6rem .9rem;border-radius:var(--radio-sm);z-index:60;box-shadow:var(--sombra)}

/* ---------- Barra ---------- */
.barra{position:sticky;top:0;z-index:30;
  background:color-mix(in srgb, var(--papel) 82%, transparent);
  backdrop-filter:saturate(1.3) blur(10px);-webkit-backdrop-filter:saturate(1.3) blur(10px);
  border-bottom:1px solid var(--linea)}
.barra-in{max-width:var(--max);margin:0 auto;padding:.75rem 1.25rem;display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}
.marca{font-weight:800;text-decoration:none;font-size:1.12rem;color:var(--tinta);letter-spacing:-.01em;display:inline-flex;align-items:center;gap:.5rem}
.marca::before{content:"";width:20px;height:22px;border-radius:2px 3px 3px 2px;flex:0 0 auto;
  background:linear-gradient(90deg, var(--rosa) 0 30%, var(--ocre) 30% 62%, var(--verde) 62% 100%);
  box-shadow:inset -2px 0 0 rgba(0,0,0,.18)}
.barra nav{display:flex;gap:1.15rem;flex-wrap:wrap;font-family:var(--sans);font-size:.9rem;align-items:center;margin-left:auto}
.barra nav a{text-decoration:none;color:var(--suave);padding:.2rem 0;position:relative}
.barra nav a:hover{color:var(--tinta)}
.barra nav a.destacado{color:var(--tinta);font-weight:600}
.barra nav a.destacado::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--ocre);border-radius:2px}
.tema{font:inherit;font-size:1rem;line-height:1;cursor:pointer;background:transparent;border:1px solid var(--linea);
  color:var(--texto);width:38px;height:34px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center}
.tema:hover{border-color:var(--ocre);background:var(--enfasis)}

main{max-width:var(--max);margin:0 auto;padding:0 1.25rem}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center;padding:4rem 0 3rem}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.06;margin:0 0 1.1rem;color:var(--tinta);font-weight:800;letter-spacing:-.015em;max-width:15ch}
.bajada{font-size:1.2rem;line-height:1.6;max-width:50ch;margin:0 0 1.6rem;color:var(--texto)}
.fuente{font-family:var(--sans);font-size:.82rem;color:var(--suave);margin-top:.9rem}
.fuente a{color:var(--suave)}

/* Estante de lomos (hero) */
.estante{display:flex;align-items:flex-end;gap:16px;height:360px;padding:0 .4rem;max-width:100%;
  position:relative;border-bottom:0}
.lomo{min-width:0}
.estante::after{content:"";position:absolute;left:-6px;right:-6px;bottom:-1px;height:12px;border-radius:3px;
  background:linear-gradient(180deg, var(--tinta), color-mix(in srgb, var(--tinta) 60%, #000));
  box-shadow:0 10px 22px color-mix(in srgb, var(--tinta) 30%, transparent)}
.lomo{position:relative;flex:1;max-width:96px;border-radius:4px 4px 0 0;
  transition:height .7s cubic-bezier(.2,.75,.2,1);display:flex;flex-direction:column;
  justify-content:space-between;align-items:center;padding:.7rem 0 .6rem;color:#fff;
  box-shadow:inset -6px 0 10px rgba(0,0,0,.18), inset 2px 0 0 rgba(255,255,255,.18), 0 6px 14px rgba(0,0,0,.14)}
.lomo.corto{justify-content:flex-start;padding-top:.4rem}
.lomo.corto .tit{position:absolute;bottom:100%;margin-bottom:.45rem;writing-mode:horizontal-tb;transform:none;color:var(--texto);font-size:.82rem}
.lomo.corto::before,.lomo.corto::after{display:none}
.lomo::before,.lomo::after{content:"";position:absolute;left:12%;right:12%;height:1.5px;background:rgba(255,255,255,.4)}
.lomo::before{top:16px}.lomo::after{bottom:16px}
.lomo .pct{font-family:var(--sans);font-weight:700;font-size:1.06rem;z-index:1;text-shadow:0 1px 2px rgba(0,0,0,.25)}
.lomo .tit{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--serif);font-weight:600;font-size:.94rem;white-space:nowrap;z-index:1;max-height:72%;overflow:hidden;text-overflow:ellipsis;text-shadow:0 1px 2px rgba(0,0,0,.25)}
.lomo.l0{background:linear-gradient(180deg,#3a857e,var(--verde))}
.lomo.l1{background:linear-gradient(180deg,#5d6a89,#4a5572)}
.lomo.l2{background:linear-gradient(180deg,#c89434,var(--ocre))}
.lomo.l3{background:linear-gradient(180deg,#b85268,var(--rosa))}
@media (prefers-reduced-motion: reduce){.lomo{transition:none}}

/* ---------- Controles tipo "chip" ---------- */
.selector{display:inline-flex;flex-wrap:wrap;gap:.45rem;font-family:var(--sans)}
.selector button{font:inherit;font-size:.9rem;padding:.44rem .95rem;border:1px solid var(--linea);
  background:var(--superficie);color:var(--texto);border-radius:999px;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.selector button:hover{border-color:var(--ocre)}
.selector button[aria-checked="true"]{background:var(--tinta);color:#fff;border-color:var(--tinta)}
:root[data-theme="dark"] .selector button[aria-checked="true"]{color:var(--papel)}

.actores{display:flex;gap:1rem 1.25rem;align-items:center;flex-wrap:wrap;padding:1.4rem 0;
  border-top:1px solid var(--linea);border-bottom:1px solid var(--linea);
  font-family:var(--sans);font-size:.95rem;color:var(--suave)}
.actores p{margin:0;font-weight:600;color:var(--tinta)}

/* ---------- Bloques ---------- */
.bloque{padding:3.25rem 0;border-bottom:1px solid var(--linea)}
.bloque:last-of-type{border-bottom:0}
h2{font-size:clamp(1.7rem,3.1vw,2.3rem);color:var(--tinta);margin:0 0 .6rem;line-height:1.14;letter-spacing:-.01em}
h3{font-family:var(--sans);font-weight:600;font-size:1.08rem;color:var(--tinta);margin:2.25rem 0 .6rem}
.lead{font-size:1.18rem;max-width:62ch;margin:0 0 1.9rem;color:var(--texto)}
.nota{font-family:var(--sans);font-size:.86rem;color:var(--suave);max-width:70ch;line-height:1.6}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}

figure{margin:0;background:var(--superficie);border:1px solid var(--linea);border-radius:var(--radio);
  padding:1.1rem 1.1rem .85rem;min-width:0;box-shadow:var(--sombra)}
figure .lienzo{position:relative;width:100%}
figcaption{font-family:var(--sans);font-size:.83rem;color:var(--suave);margin-top:.7rem;line-height:1.5}

/* KPI / cifras como fichas */
.cifras{margin-top:1.9rem;display:grid;gap:1rem}
.cifras div{position:relative;background:var(--superficie);border:1px solid var(--linea);border-left:4px solid var(--ocre);
  border-radius:var(--radio-sm);padding:.85rem 1rem;box-shadow:var(--sombra)}
.cifras b{display:block;font-family:var(--serif);font-weight:800;font-size:2rem;color:var(--tinta);line-height:1.05;letter-spacing:-.01em}
.cifras span{display:block;margin-top:.25rem;font-family:var(--sans);font-size:.9rem;color:var(--suave);line-height:1.5}
.cifras.col{margin-top:0}

.impl{margin-top:1.4rem;background:var(--enfasis);border:1px solid var(--linea);border-radius:var(--radio-sm);
  padding:1rem 1.2rem;max-width:80ch;font-size:1.02rem;position:relative}
.impl::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:var(--radio-sm) 0 0 var(--radio-sm);background:var(--verde)}
.impl[hidden]{display:none}
.veredicto{margin-top:2.25rem;padding:1.6rem 1.9rem;border:1px solid var(--tinta);border-radius:var(--radio);
  background:var(--superficie);max-width:82ch;box-shadow:var(--sombra)}
.veredicto h3{margin-top:0}

/* Tablas */
.tabla-scroll{overflow-x:auto;border:1px solid var(--linea);border-radius:var(--radio);background:var(--superficie);box-shadow:var(--sombra)}
table{border-collapse:collapse;width:100%;font-family:var(--sans);font-size:.92rem}
th,td{text-align:left;padding:.7rem .9rem;border-bottom:1px solid var(--linea);vertical-align:top}
tr:last-child td{border-bottom:0}
th{color:var(--tinta);background:var(--enfasis);font-weight:600;position:sticky;top:0}
tbody tr:nth-child(even) td{background:color-mix(in srgb, var(--enfasis) 45%, transparent)}

.vacios li{margin:.5rem 0;max-width:80ch}
.fuentes{font-family:var(--sans);font-size:.9rem}
.fuentes li{margin:.5rem 0;max-width:95ch}
.fuentes li:target{background:var(--enfasis);outline:2px solid var(--ocre);border-radius:4px;padding:.2rem .4rem}
.tag{display:inline-block;font-family:var(--sans);font-size:.72rem;padding:.1rem .5rem;border:1px solid var(--linea);
  border-radius:999px;color:var(--suave);margin-left:.4rem;vertical-align:middle}

.pie{max-width:var(--max);margin:0 auto;padding:2.5rem 1.25rem 3.5rem;font-family:var(--sans);font-size:.9rem;color:var(--suave);line-height:1.7}
.pie a{color:var(--tinta)}
.pie .apoyo{margin-top:.6rem;font-size:.88rem}

/* Página de recomendaciones */
.doc{max-width:720px;margin:0 auto;padding:3.25rem 1.25rem}
.doc h1{max-width:none;font-size:clamp(2rem,4vw,2.9rem)}
.doc h2{margin-top:3rem;font-family:var(--serif);font-weight:800}
.doc h3{font-family:var(--serif);font-weight:700;font-size:1.25rem}
.doc p,.doc li{max-width:70ch}
.doc .lead{font-size:1.22rem}
.doc .tabla-scroll{margin:1.25rem 0}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .hero{grid-template-columns:1fr;gap:2rem;padding:2.5rem 0 2rem}
  .estante{height:280px}
  .grid2,.grid3{grid-template-columns:1fr}
  .barra{position:static}
  .barra-in{gap:.75rem}
  .barra nav{gap:.85rem;font-size:.85rem;margin-left:0}
}

/* ============================================================
   Asistente (chat)
   ============================================================ */
.chat-fab{position:fixed;right:20px;bottom:20px;z-index:50;width:60px;height:60px;border-radius:50%;
  border:none;cursor:pointer;color:#fff;font-size:1.5rem;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 120% at 30% 25%, color-mix(in srgb,var(--tinta) 80%, #fff 0%), var(--tinta));
  box-shadow:0 8px 24px rgba(0,0,0,.30), inset 0 0 0 2px color-mix(in srgb,var(--ocre) 55%, transparent);
  margin-bottom:env(safe-area-inset-bottom,0px);transition:transform .18s,box-shadow .18s}
.chat-fab:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.36), inset 0 0 0 2px var(--ocre)}
.chat-fab[hidden]{display:none}

.chat-panel{position:fixed;right:20px;bottom:20px;z-index:51;width:min(390px,calc(100vw - 32px));
  height:min(600px,calc(100vh - 110px));background:var(--superficie);border:1px solid var(--linea);
  border-radius:18px;box-shadow:var(--sombra-alta);display:flex;flex-direction:column;overflow:hidden;
  animation:chat-in .22s cubic-bezier(.2,.8,.2,1)}
.chat-panel[hidden]{display:none}
@keyframes chat-in{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.chat-panel{animation:none}.chat-fab{transition:none}}
.chat-cab{display:flex;align-items:center;gap:.6rem;padding:.85rem 1rem;color:#fff;font-family:var(--sans);
  background:linear-gradient(135deg, var(--tinta), color-mix(in srgb,var(--tinta) 72%, var(--verde)))}
.chat-cab .pt{width:9px;height:9px;border-radius:50%;background:#56d6a0;box-shadow:0 0 0 3px rgba(86,214,160,.25);flex:0 0 auto}
.chat-cab strong{font-size:1rem;flex:1}
.chat-x{background:rgba(255,255,255,.14);border:none;color:#fff;font-size:1.3rem;line-height:1;cursor:pointer;
  width:32px;height:32px;border-radius:999px;display:flex;align-items:center;justify-content:center}
.chat-x:hover{background:rgba(255,255,255,.28)}
.chat-cuerpo{flex:1;overflow-y:auto;padding:1.1rem;display:flex;flex-direction:column;gap:.65rem;background:var(--papel)}
.chat-msg{max-width:86%;padding:.65rem .85rem;border-radius:16px;font-size:.95rem;line-height:1.55;
  font-family:var(--sans);white-space:pre-wrap;word-wrap:break-word;box-shadow:var(--sombra)}
.chat-msg.bot{align-self:flex-start;background:var(--superficie);border:1px solid var(--linea);color:var(--texto);border-bottom-left-radius:5px}
.chat-msg.user{align-self:flex-end;background:var(--tinta);color:#fff;border-bottom-right-radius:5px}
:root[data-theme="dark"] .chat-msg.user{color:var(--papel)}
.chat-msg.aviso{background:transparent;border:1px dashed var(--linea);color:var(--suave);box-shadow:none}
.chat-msg.cargando{opacity:.75;font-style:italic;box-shadow:none}
.chat-sugs{display:flex;flex-wrap:wrap;gap:.4rem;padding:.6rem .8rem;border-top:1px solid var(--linea);background:var(--superficie)}
.chat-sug{font-family:var(--sans);font-size:.8rem;padding:.4rem .7rem;border:1px solid var(--linea);
  border-radius:999px;background:transparent;color:var(--tinta);cursor:pointer;transition:background .15s,border-color .15s}
.chat-sug:hover{background:var(--enfasis);border-color:var(--ocre)}
.chat-pie{display:flex;gap:.5rem;padding:.7rem .8rem;border-top:1px solid var(--linea);background:var(--superficie)}
.chat-input{flex:1;padding:.6rem .8rem;border:1px solid var(--linea);border-radius:11px;background:var(--papel);
  color:var(--texto);font-family:var(--sans);font-size:.95rem}
.chat-input:focus{outline:2px solid var(--ocre);outline-offset:0;border-color:var(--ocre)}
.chat-send{padding:.6rem 1rem;border:none;border-radius:11px;background:var(--ocre);color:#1b1500;
  font-family:var(--sans);font-weight:700;cursor:pointer}
.chat-send:hover{filter:brightness(1.05)}
.chat-send:disabled{opacity:.6;cursor:default}
@media (max-width:480px){
  .chat-panel{right:8px;left:8px;bottom:8px;width:auto;height:min(80vh,620px)}
}

/* ---------- Apoyo ---------- */
.apoyo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:.5rem;max-width:760px}
.apoyo-card{display:flex;flex-direction:column;gap:.15rem;text-decoration:none;color:var(--texto);
  background:var(--superficie);border:1px solid var(--linea);border-radius:var(--radio);
  padding:1.15rem 1.2rem;box-shadow:var(--sombra);transition:border-color .15s,transform .15s}
a.apoyo-card:hover{border-color:var(--ocre);transform:translateY(-2px)}
.apoyo-card .ap-ico{font-size:1.6rem;line-height:1}
.apoyo-card strong{font-family:var(--sans);font-size:1.02rem;color:var(--tinta);margin-top:.35rem}
.apoyo-card .ap-sub{font-family:var(--sans);font-size:.85rem;color:var(--suave)}
@media (max-width:680px){ .apoyo-grid{grid-template-columns:1fr} }
@media (prefers-reduced-motion:reduce){ a.apoyo-card:hover{transform:none} }