/* CULTURA21 — página del libro de Ron Wood (usa los colores y fuentes de style.css) */

.nav__links a[aria-current="page"]{color:var(--paper);border-color:var(--red)}

.shop{max-width:1180px;margin:0 auto;padding:32px 20px 56px}

/* ---------- producto: galería + compra ---------- */
.shop__top{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:start}

.gallery__main{
  margin:0;aspect-ratio:3/2;background:#0b0605;
  border:1px solid var(--hair);border-radius:4px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.gallery__main img{width:100%;height:100%;object-fit:contain}
.gallery__thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:8px;margin-top:10px}
.gallery__thumbs button{
  padding:0;border:1px solid var(--hair);border-radius:3px;background:#0b0605;cursor:pointer;
  aspect-ratio:1;overflow:hidden;opacity:.7;transition:opacity .2s,border-color .2s;
}
.gallery__thumbs button:hover{opacity:1}
.gallery__thumbs button.is-active{opacity:1;border-color:var(--brass);box-shadow:0 0 0 1px var(--brass)}
.gallery__thumbs img{width:100%;height:100%;object-fit:cover}

.buy{
  position:sticky;top:calc(var(--nav-h) + 20px);
  background:linear-gradient(180deg,#24120e,#170a08);
  border:1px solid rgba(196,163,108,.35);border-radius:6px;
  padding:26px 26px 22px;
  box-shadow:inset 0 1px 0 rgba(239,230,214,.06),0 30px 70px -30px #000;
}
.buy__lead{margin:0 0 6px;color:var(--brass);font-style:italic;font-size:16px}
.buy__title{margin:0;font-family:var(--display);font-weight:400;font-size:38px;line-height:1.05}
.buy__by{margin:8px 0 18px;color:var(--dim)}
.buy__facts{list-style:none;margin:0 0 22px;padding:16px 0 0;border-top:1px solid var(--hair);display:grid;gap:9px;font-size:15px;line-height:1.45}
.buy__facts li{position:relative;padding-left:18px}
.buy__facts li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:1px;background:var(--brass)}
.buy__btn{
  display:flex;align-items:center;justify-content:center;height:56px;border-radius:4px;
  background:var(--red);color:#fff;font-weight:700;font-size:20px;letter-spacing:.01em;
  transition:background .2s,transform .1s;
}
.buy__btn:hover{background:#ff4a49}
.buy__btn:active{transform:translateY(1px)}
.buy__pay{margin:12px 0 0;font-size:14px;line-height:1.45;color:var(--dim);text-align:center}

/* ---------- bloques ---------- */
.block{margin-top:56px}
.block__title{margin:0 0 16px;font-family:var(--display);font-weight:400;font-size:30px}

.video__frame{position:relative;aspect-ratio:16/9;background:#000;border:1px solid var(--hair);border-radius:4px;overflow:hidden}
.video__frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* descripción sobre "papel", como una página del libro */
.paper{
  background:var(--paper);color:var(--ink);border-radius:4px;
  padding:clamp(24px,5vw,56px);
  display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(28px,5vw,64px);
}
.paper__banner{grid-column:1 / -1;width:min(100%,560px);margin:0 auto 32px;mix-blend-mode:multiply}
.paper__lang h2{
  margin:0 0 14px;padding-bottom:10px;border-bottom:1px solid rgba(20,9,8,.18);
  font-family:var(--display);font-weight:400;font-size:26px;color:#7d1512;
}
.paper__intro{margin:0 0 10px;font-size:18px;line-height:1.55}
.paper__name{margin:0 0 18px;font-family:var(--display);font-size:24px}
.specs{margin:0;display:grid;grid-template-columns:auto 1fr;gap:9px 16px;font-size:15px;line-height:1.5}
.specs dt{font-style:italic;color:#6b5236}
.specs dd{margin:0}
.paper__cta{grid-column:1 / -1;width:min(100%,360px);margin:36px auto 0}
.paper__cta .buy__pay{color:#5e4d3d}

/* barra de compra del teléfono */
.buybar{display:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .shop__top{grid-template-columns:1fr;gap:20px}
  .buy{position:static}
  .paper{grid-template-columns:1fr}
  .paper__lang + .paper__lang{margin-top:36px}
}
@media (max-width:600px){
  .shop{padding:16px 10px 40px}
  .buy{padding:20px 18px}
  .buy__title{font-size:32px}
  .block{margin-top:40px}
  .block__title{font-size:24px}
  .specs{grid-template-columns:1fr;gap:2px}
  .specs dd{margin-bottom:10px}
  .buybar{
    display:flex;align-items:center;gap:12px;
    position:fixed;left:0;right:0;bottom:0;z-index:60;
    padding:10px 12px calc(10px + env(safe-area-inset-bottom));
    background:rgba(20,9,8,.95);border-top:1px solid var(--hair);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .buybar__name{flex:1;font-size:14px;color:var(--dim);font-style:italic;line-height:1.3}
  .buybar__btn{padding:12px 22px;border-radius:4px;background:var(--red);color:#fff;font-weight:700}
  .page-libro .foot{padding-bottom:70px}
}