/* Mundos extintos — web comercial del Miniatlas del Pérmico. Mobile-first, sin dependencias.
   Tipografías: Alfa Slab One (títulos), Source Serif 4 (texto), Barlow Condensed (datos). SIL OFL 1.1. */
@font-face{font-family:"Alfa Slab One";src:url("../fonts/alfa-slab-one.woff2") format("woff2");font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("../fonts/source-serif-4.woff2") format("woff2");font-weight:400 700;font-style:normal;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("../fonts/source-serif-4-italic.woff2") format("woff2");font-weight:400 700;font-style:italic;font-display:swap}
@font-face{font-family:"Barlow Condensed";src:url("../fonts/barlow-condensed-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Barlow Condensed";src:url("../fonts/barlow-condensed-700.woff2") format("woff2");font-weight:700;font-display:swap}

:root{
  --rock:#16110e; --rock-2:#211914; --stone:#E4E6DF; --stone-2:#D6D9D0; --bone:#F2EFE6; --ink:#1a1411; --muted:#5c5348;
  --perm:#B1452B; --perm-hi:#E2593A; --gold:#E8C58E;
  --h:#5ED3AC; --i:#F2B24C; --r:#B99BFF; --hl:#157058; --il:#8B5A00; --rl:#6A3BC9;
  --font-title:"Alfa Slab One",Georgia,serif; --font-text:"Source Serif 4",Georgia,serif; --font-data:"Barlow Condensed","Arial Narrow",sans-serif;
  --gutter:clamp(18px,5vw,56px); --max:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--rock);color:var(--bone);font:400 1.125rem/1.55 var(--font-text);text-rendering:optimizeLegibility}
[hidden]{display:none!important}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--font-title);font-weight:400;line-height:1.08;margin:0}
p{margin:0 0 1em}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--bone);color:var(--ink);padding:10px 16px;border-radius:4px;font-family:var(--font-data);font-weight:700}
.skip:focus{top:12px}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:2px}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}

/* aviso de vista privada */
.private{background:#2a1d12;color:var(--gold);font:700 .95rem/1.3 var(--font-data);letter-spacing:.02em;padding:8px var(--gutter);text-align:center;border-bottom:1px solid #4a3522}
.private[hidden]{display:none}

/* cabecera */
.top{position:absolute;inset:auto 0 auto 0;z-index:20;padding:14px var(--gutter);display:flex;justify-content:space-between;align-items:center;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font:400 1.3rem/1 var(--font-title);color:var(--bone)}
.brand svg{width:26px;height:26px;flex:none}
.top nav{display:none;gap:26px;font:700 1rem var(--font-data);letter-spacing:.03em}
.top nav a{text-decoration:none;opacity:.9}.top nav a:hover{opacity:1;text-decoration:underline;text-underline-offset:5px}
@media (min-width:860px){.top nav{display:flex}}
.top .mini{font:700 .95rem var(--font-data);letter-spacing:.03em;text-decoration:none;border:1.5px solid rgba(242,239,230,.6);padding:8px 14px;border-radius:999px}
@media (min-width:860px){.top .mini{display:none}}

/* botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:14px 26px;border-radius:999px;border:2px solid transparent;font:700 1.12rem/1.1 var(--font-data);letter-spacing:.03em;text-decoration:none;cursor:pointer;transition:transform .15s ease,background-color .15s ease}
.btn-primary{background:var(--perm-hi);color:#190d08;border-color:var(--perm-hi)}
.btn-primary:hover{transform:translateY(-1px);background:#ee6a4b}
.btn-ghost{background:rgba(22,17,14,.5);color:var(--bone);border-color:rgba(242,239,230,.7)}
.btn-ghost:hover{background:rgba(242,239,230,.12)}
.btn[aria-disabled="true"]{background:#3a2d24;border-color:#5b4a3c;color:#cdbfae;cursor:not-allowed;transform:none}
.btn small{font:500 .85rem var(--font-data);opacity:.85;letter-spacing:.02em}

/* héroe */
.hero{position:relative;min-height:min(100svh,880px);display:grid;align-items:end;overflow:hidden;background:var(--rock)}
.hero picture,.hero img.bg{position:absolute;inset:0;width:100%;height:100%}
.hero img.bg{object-fit:cover;object-position:76% center}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,var(--rock) 4%,rgba(22,17,14,.88) 24%,rgba(22,17,14,.35) 52%,rgba(22,17,14,.1) 74%),linear-gradient(90deg,rgba(22,17,14,.55),rgba(22,17,14,0) 55%)}
.hero .in{position:relative;z-index:2;padding:120px var(--gutter) 44px;max-width:var(--max);margin:0 auto;width:100%}
.hero h1{font-size:clamp(2.7rem,9.5vw,5.6rem);max-width:12ch;text-shadow:0 2px 24px rgba(0,0,0,.5)}
.hero .lede{font-size:clamp(1.15rem,3.4vw,1.5rem);line-height:1.4;max-width:34ch;margin:18px 0 26px;color:#efe8d6}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.hero .facts{margin:22px 0 0;font:500 1.05rem var(--font-data);color:var(--gold);letter-spacing:.02em}
@media (max-width:520px){.cta-row .btn{width:100%}.hero img.bg{object-position:80% center}}

/* secciones */
section{position:relative}
.sec{padding:clamp(64px,10vw,120px) 0}
.sec-light{background:var(--stone);color:var(--ink)}
.sec-rock2{background:var(--rock-2)}
.sec h2{font-size:clamp(1.9rem,5.6vw,3.2rem);max-width:20ch}
.sec .intro{font-size:clamp(1.15rem,3vw,1.4rem);max-width:46ch;margin-top:18px;color:inherit;opacity:.92}
.strata{display:block;width:100%;height:14px;background:linear-gradient(90deg,#F04028 0 22%,#F25F4C 22% 51%,#F4796A 51% 80%,#F9A598 80%)}

/* tres etiquetas */
.seals{list-style:none;margin:36px 0 0;padding:0;display:grid;gap:0;border-top:1px solid rgba(26,20,17,.25)}
.seals li{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid rgba(26,20,17,.25);align-items:start}
.seals svg{width:46px;height:46px}
.seals h3{font-size:1.5rem;margin-bottom:4px}
.seals p{margin:0;max-width:48ch}
.seals .h h3,.seals .h svg{color:var(--hl)}.seals .i h3,.seals .i svg{color:var(--il)}.seals .r h3,.seals .r svg{color:var(--rl)}
@media (min-width:900px){
  .split{display:grid;grid-template-columns:1fr 1.15fr;gap:64px;align-items:start}
  .seals{margin-top:6px}
}

/* fósil / pintura, lado a lado */
.cmp-tabs{display:flex;gap:10px;margin:28px 0 18px;flex-wrap:wrap}
.cmp-tabs button{font:700 1rem var(--font-data);letter-spacing:.03em;background:transparent;color:var(--bone);border:1.5px solid rgba(242,239,230,.5);padding:9px 18px;border-radius:999px;cursor:pointer}
.cmp-tabs button[aria-pressed="true"]{background:var(--bone);color:var(--ink);border-color:var(--bone)}
.pair{display:grid;gap:26px;margin-top:28px}
.pair figure{margin:0}
.pair .ph{aspect-ratio:4/3;border-radius:6px;overflow:hidden;background:#000}
.pair .ph img{width:100%;height:100%;object-fit:cover}
.pair .ph.top img{object-position:50% 14%}
.pair figcaption{font-size:.98rem;line-height:1.4;color:#d8d0c0;margin-top:12px;max-width:60ch}
.pair figcaption a{color:var(--gold)}
.lbl{display:block;font:700 1.02rem var(--font-data);letter-spacing:.03em;margin-bottom:4px}
.lbl.h{color:#8fc7e8}.lbl.r{color:#f0a38c}
.pair-note{margin-top:22px}
@media (min-width:900px){.pair{grid-template-columns:1fr 1fr;gap:34px}}

/* animales */
.animals{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.an{position:relative;border-radius:6px;overflow:hidden;background:#000;aspect-ratio:3/4}
.an img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.an:hover img{transform:scale(1.03)}
.an figcaption,.an .cap{position:absolute;inset:auto 0 0 0;padding:44px 14px 14px;background:linear-gradient(0deg,rgba(14,10,8,.94),rgba(14,10,8,0))}
.an h3{font-size:1.25rem}
.an p{margin:4px 0 0;font:500 1rem/1.2 var(--font-data);color:#e0d6c2;letter-spacing:.02em}
.an em{font-style:italic;font-family:var(--font-text);font-weight:400;font-size:1rem;display:block;color:var(--gold);margin-top:2px}
@media (min-width:760px){
  .animals{grid-template-columns:repeat(3,1fr);gap:20px 20px;padding-bottom:30px}
  .an,.an:nth-child(n+4){aspect-ratio:4/5}
  .an:nth-child(3n+2){transform:translateY(34px)}
}
.note-small{font:500 1rem/1.35 var(--font-data);letter-spacing:.02em;color:#cfc4b2;margin-top:18px;max-width:70ch}

/* vista previa */
.strip{display:flex;gap:16px;overflow-x:auto;padding:6px var(--gutter) 20px;margin:36px calc(-1*var(--gutter)) 0;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:#6b5a49 transparent}
.strip li{flex:0 0 min(86vw,560px);scroll-snap-align:center;list-style:none}
.strip button{all:unset;display:block;cursor:zoom-in;border-radius:6px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.35)}
.strip button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.strip img{width:100%;aspect-ratio:297/210;object-fit:cover}
.strip .c{font:500 1rem/1.3 var(--font-data);color:#cfc4b2;margin-top:10px;letter-spacing:.02em}
.strip ul{display:contents}
.phones{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:44px;max-width:760px}
.phones button{all:unset;display:block;cursor:zoom-in;border:5px solid #070504;border-radius:18px;overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.phones button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.phones img{width:100%;aspect-ratio:9/16;object-fit:cover}
@media (max-width:520px){.phones{grid-template-columns:repeat(2,1fr)}}
dialog{border:0;padding:0;background:transparent;max-width:min(96vw,1400px);max-height:94svh;overflow:visible}
dialog::backdrop{background:rgba(8,6,5,.88)}
dialog img{max-height:90svh;width:auto;max-width:96vw;border-radius:6px;margin:0 auto}
dialog form{position:absolute;top:-4px;right:0}
dialog .close{font:700 1rem var(--font-data);background:var(--bone);color:var(--ink);border:0;border-radius:999px;padding:10px 18px;cursor:pointer;transform:translateY(-100%)}

/* utilidades */
.mt{margin-top:34px}
.muted{color:var(--muted)}

/* qué incluye */
.incl{list-style:none;margin:34px 0 0;padding:0;display:grid;gap:0}
.incl li{display:grid;grid-template-columns:44px 1fr;gap:6px 18px;padding:22px 0;border-top:1px solid rgba(26,20,17,.28);align-items:baseline}
.incl li:last-child{border-bottom:1px solid rgba(26,20,17,.28)}
.incl .n{font:400 2.3rem/1 var(--font-title);color:var(--perm);grid-row:1/4}
.incl h3{font-size:1.4rem;grid-column:2}
.incl p{margin:6px 0 0;grid-column:2;max-width:56ch}
.incl .meta{font:700 1rem var(--font-data);letter-spacing:.03em;color:var(--muted);grid-column:2}
.free{margin-top:26px;padding:18px 20px;border:1.5px dashed rgba(26,20,17,.45);border-radius:6px;max-width:60ch}
.free p{margin:0 0 10px}
.free a{font-weight:600}

/* compra */
.buy{display:grid;gap:34px}
@media (min-width:900px){.buy{grid-template-columns:1fr 1fr;gap:70px;align-items:center}}
.price{font:400 clamp(3rem,11vw,5rem)/1 var(--font-title);color:var(--bone);display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:6px 0 0}
.price small{font:500 1.1rem var(--font-data);color:var(--gold);letter-spacing:.03em;white-space:nowrap}
.buy .box{padding:6px 0}
.buy ul{margin:18px 0 26px;padding-left:20px}
.buy li{margin:6px 0}
.status{font:700 1rem/1.3 var(--font-data);color:var(--gold);margin:12px 0 0;letter-spacing:.02em}
.cover-img{border-radius:6px;box-shadow:0 18px 60px rgba(0,0,0,.55)}

/* transparencia */
.trans{list-style:none;padding:0;margin:34px 0 0;display:grid;gap:0}
.trans li{padding:18px 0;border-top:1px solid rgba(26,20,17,.28);display:grid;grid-template-columns:1fr;gap:4px}
.trans li:last-child{border-bottom:1px solid rgba(26,20,17,.28)}
.trans b{font-family:var(--font-title);font-weight:400;font-size:1.2rem}
@media (min-width:860px){.trans li{grid-template-columns:280px 1fr;gap:34px}}

/* canal y faq */
.about{display:grid;gap:30px}
@media (min-width:900px){.about{grid-template-columns:1.1fr 1fr;gap:70px;align-items:center}}
.about img{border-radius:6px}
details{border-top:1px solid rgba(242,239,230,.25)}
details:last-of-type{border-bottom:1px solid rgba(242,239,230,.25)}
summary{cursor:pointer;list-style:none;padding:20px 40px 20px 0;font:400 1.2rem/1.25 var(--font-title);position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);font:700 1.8rem var(--font-data);color:var(--gold)}
details[open] summary::after{content:"–"}
details p{padding:0 0 22px;max-width:62ch;margin:0}
.faq{margin-top:34px}

/* pie */
footer{background:#0f0b09;padding:54px 0 40px;font-size:1rem;color:#cdc3b2}
footer .cols{display:grid;gap:30px}
@media (min-width:760px){footer .cols{grid-template-columns:1.4fr 1fr 1fr}}
footer h2{font:700 1.05rem var(--font-data);letter-spacing:.04em;margin:0 0 12px;color:var(--bone)}
footer ul{list-style:none;margin:0;padding:0}footer li{margin:7px 0}
footer a{text-underline-offset:4px}
footer .small{font-size:.92rem;margin-top:28px;max-width:80ch;color:#a89e8d}

/* páginas legales */
.legal{background:var(--stone);color:var(--ink);min-height:100svh}
.legal header{background:var(--rock);padding:18px var(--gutter)}
.legal main{max-width:760px;margin:0 auto;padding:54px var(--gutter) 90px}
.legal h1{font-size:clamp(2rem,6vw,3rem);margin-bottom:18px}
.legal h2{font-size:1.4rem;margin:34px 0 10px}
.legal .pending{background:#fff4d6;border-left:5px solid #c58a00;padding:12px 16px;border-radius:3px;margin:18px 0;font-size:1rem}
.legal ul{padding-left:22px}
.legal a{color:#6A3BC9}
.legal .back{display:inline-block;margin-top:34px;font:700 1rem var(--font-data);letter-spacing:.03em}
.legal table{border-collapse:collapse;width:100%;font-size:.95rem}
.legal td,.legal th{border-bottom:1px solid rgba(26,20,17,.25);padding:8px 10px 8px 0;text-align:left;vertical-align:top}

@media print{.top,.private,.btn,.strip,.cmp-tabs{display:none}body{background:#fff;color:#000}}

/* qué recibes + compra */
.deal{display:grid;gap:30px;margin-top:6px}
.deal .incl{margin-top:18px}
.buybox{order:-1;background:var(--rock);color:var(--bone);border-radius:8px;padding:26px 24px;align-self:start}
.buybox .btn{width:100%}
.buybox .status{font-size:.98rem}
.sample-link{margin:16px 0 0;font-size:1rem}
.sample-link a{color:var(--gold)}
@media (min-width:900px){.deal{grid-template-columns:1.25fr 1fr;gap:56px;align-items:start}.buybox{order:0;position:sticky;top:90px}}
.note-small{font-size:.95rem;line-height:1.45;max-width:70ch;margin-top:22px}
.phones-title{font-size:1.2rem;margin:44px 0 0}
.phones{margin-top:18px}
.cta-after{margin:30px 0 0}
/* barra fija de compra (solo celular) */
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom));background:rgba(22,17,14,.94);border-top:1px solid rgba(242,239,230,.2)}
.sticky .btn{width:100%;min-height:48px}
@media (min-width:860px){.sticky{display:none!important}}