/* Biblioteca · ficha de libro (v5, skill frontend-design). Identidad base: Dosis/Raleway, crema, marrón, teal, cielo, oro.
   Idea central: la portada «apoyada en una balda» (filete marrón al pie de una franja cielo claro). Todo lo demás, sobrio.
   Móvil primero; escalones a 641 px (tablet) y 1024 px (composición de librería: franja de producto en 3 columnas
   —portada | título, datos y compra | Detaljer— y texto de lectura debajo, alineado con el título).
   Variante .is-cover-pop (activa en book.php): portada +50 % que cruza la balda; quitar la clase = composición sin sobresalir. */
.bk-book { --bk-ink: var(--color-brown); --bk-label: var(--color-teal); --bk-line: #EADFD3; --band-bg: #EAF4F8; --band-shelf: #B5835E; --band-text: #22313A; text-align: left; }
[data-theme="dark"] .bk-book { --bk-ink: var(--color-accent-warm); --bk-label: #8FCFE0; --bk-line: var(--color-border); --band-bg: #15303B; --band-shelf: #B9784A; --band-text: var(--color-text); }
.main-hx > .content-card.bk-book { --bk-max: 1240px; width: calc(100% - 1rem); max-width: var(--bk-max); margin-inline: auto; padding: 0 0 1.5rem; overflow: hidden; border-radius: 10px; }

/* Migas fuera de la tarjeta, sobre el fondo de la página */
.bk-crumbs-out { width: calc(100% - 1rem); max-width: 1240px; margin: .9rem auto 0; font-size: .82rem; position: relative; z-index: 1; }
.bk-crumbs-out a { color: var(--bk-ink, var(--color-brown)); }
[data-theme="dark"] .bk-crumbs-out a { color: var(--color-accent-warm); }

/* Franja con balda */
.bk-band { background: var(--band-bg); color: var(--band-text); padding: 1.1rem 1rem 0; border-bottom: 3px solid var(--band-shelf); }
.bk-hero { display: grid; grid-template-columns: 40% 1fr; gap: 1rem; align-items: start; }
.bk-hero-cover { align-self: start; min-width: 0; }
.bk-book-cover { aspect-ratio: 2 / 3; overflow: hidden; border-radius: 2px 3px 3px 2px; box-shadow: -1px 0 0 rgba(0,0,0,.12) inset, 0 -2px 10px rgba(0,0,0,.08), 6px 0 14px rgba(0,0,0,.14); background: rgba(0,0,0,.04); }
[data-theme="dark"] .bk-book-cover { box-shadow: 0 2px 4px rgba(0,0,0,.5), 0 12px 26px rgba(0,0,0,.45); }
.bk-hero-main { align-self: stretch; display: flex; flex-direction: column; justify-content: flex-start; gap: 1rem; min-width: 0; padding-bottom: 1rem; }
.bk-hero-main .bk-buy { margin-top: auto; }
.bk-hero-main h1 { margin: 0 0 .5rem; padding-top: 0; font-family: var(--font-heading); font-weight: 600; font-size: clamp(1.35rem, 5.2vw, 2.6rem); line-height: 1.05; color: var(--bk-ink); text-align: left; overflow-wrap: anywhere; }
.bk-byline { margin: 0 0 .3rem; font-size: .92rem; }

/* Datos con etiqueta, estilo librería: etiqueta pequeña en teal, dato en negrita */
.bk-spec { display: grid; grid-template-columns: 1fr; gap: .28rem; margin: 0; font-size: .9rem; line-height: 1.3; }
.bk-spec div { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 .35rem; }
.bk-spec dt { font-size: .78rem; color: var(--bk-label); }
.bk-spec dt::after { content: ":"; }
.bk-spec dd { margin: 0; font-weight: 600; }
.bk-spec .is-age dd { box-shadow: inset 0 -.45em 0 var(--color-gold); }
[data-theme="dark"] .bk-spec .is-age dd { color: #FFD866; box-shadow: inset 0 -2px 0 #FFCC00; }

/* Compra: «Kjøp hos» una vez + dos botones de logo, con el acento de marca de cada tienda (filete inferior + icono) */
.bk-buy-head { display: flex; justify-content: space-between; align-items: baseline; gap: .5rem; margin: 0 0 .25rem; }
.bk-buy-head span { font-family: var(--font-heading); font-weight: 700; font-size: 1rem; color: var(--bk-ink); }
.bk-buy-head small { font-size: .68rem; opacity: .6; }
[data-theme="dark"] .bk-buy-head small { opacity: .75; }
.bk-buy { max-width: 340px; }
.bk-buy-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .45rem; max-width: 320px; }
.bk-buy-btn { position: relative; display: flex; align-items: center; justify-content: center; height: 48px; padding: 0 1.4rem 0 .5rem; color: var(--color-teal); background: #fff; border: 1px solid #C9DCE4; border-bottom-width: 3px; border-radius: 4px; transition: border-color .15s ease, box-shadow .15s ease, transform .08s ease; }
.bk-buy-btn.is-norli { border-bottom-color: #004F6B; --store: #004F6B; }
.bk-buy-btn.is-ark { border-bottom-color: #E8740C; --store: #C25A00; }
.bk-buy-ext { position: absolute; right: .45rem; top: 50%; transform: translateY(-50%); color: var(--store, var(--color-teal)); opacity: .9; }
.bk-buy-logo { max-height: 32px; max-width: 100%; width: auto; height: auto; display: block; }
.bk-buy-btn.is-ark .bk-buy-logo { max-height: 36px; }
.bk-buy-btn.is-off { cursor: default; }
a.bk-buy-btn:focus-visible { outline: 3px solid var(--color-gold); outline-offset: 2px; }
[data-theme="dark"] .bk-buy-btn { background: #DDE5EA; border-color: #3A6476; }
[data-theme="dark"] .bk-buy-btn.is-norli { border-bottom-color: #3E9DC0; }
[data-theme="dark"] .bk-buy-btn.is-ark { border-bottom-color: #F2954D; }
/* hover solo con ratón; al tocar (móvil) el botón se hunde */
@media (hover: hover) {
  a.bk-buy-btn:hover { border-color: var(--store, var(--color-teal)); box-shadow: 0 3px 10px rgba(31, 94, 115, .18); }
  a.bk-buy-btn:hover .bk-buy-ext { opacity: 1; }
}
a.bk-buy-btn:active { transform: translateY(2px); border-bottom-width: 1px; margin-bottom: 2px; box-shadow: none; }
@media (prefers-reduced-motion: reduce) { .bk-buy-btn { transition: none; } a.bk-buy-btn:active { transform: none; } .bk-details summary::after { transition: none; } }

/* Contenido tras la franja */
.bk-body { padding: 0 1rem; }
.bk-columns { display: flex; flex-direction: column; }
.bk-side { display: contents; }
.bk-columns .bk-recommend { order: -1; }
.bk-columns .bk-main { order: 0; }
.bk-columns .bk-details { order: 1; }
.bk-recommend { max-width: 68ch; margin: 1.6rem auto 0; padding-left: .9rem; border-left: 3px solid var(--color-gold); }
.bk-recommend p { margin: 0; font-size: 1.06rem; line-height: 1.55; }
[data-theme="dark"] .bk-recommend p { color: #E8E3DA; }
.bk-section { margin-top: 2rem; }
.bk-section > p, .bk-section > ul { max-width: 68ch; margin-left: auto; margin-right: auto; }
.content-card.bk-book .bk-section h2 { font-size: 1.3rem; line-height: 1.2; margin: 0 0 .6rem; }
.content-card.bk-book .bk-hero-main h1 { font-size: 1.6rem; }

/* «Detaljer om boken»: plegable. is-flow = tras el texto (móvil/tablet); is-side = en la franja (escritorio) */
.bk-details { max-width: 68ch; margin: 2.25rem auto 0; border-top: 1px solid var(--bk-line); border-bottom: 1px solid var(--bk-line); }
.bk-columns .bk-details { width: 100%; align-self: stretch; }
.bk-details[open] { padding-bottom: .5rem; }
.bk-details summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; font-family: var(--font-heading); font-weight: 700; font-size: 1.1rem; color: var(--bk-ink); }
.content-card.bk-book .bk-details summary { font-size: 1.05rem; }
.bk-details summary::-webkit-details-marker { display: none; }
.bk-details summary::after { content: ""; width: .45rem; height: .45rem; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); transition: transform .2s ease; margin-right: .3rem; }
.bk-details[open] summary::after { transform: rotate(-135deg); }
.bk-details summary:focus-visible { outline: 2px solid var(--bk-ink); outline-offset: 2px; }
.bk-facts { display: grid; grid-template-columns: 1fr; gap: 0; margin: 0 0 .5rem; }
.bk-facts div { display: flex; justify-content: space-between; gap: 1rem; padding: .45rem 0; border-top: 1px dotted var(--bk-line); }
.bk-facts dt { font-size: .82rem; color: var(--bk-label); }
.bk-facts dd { margin: 0; font-weight: 600; text-align: right; }
.bk-details .bk-cover-credit { margin: 0 0 .75rem; font-size: .8rem; opacity: .75; text-align: left; }
.bk-details.is-side { display: none; }

/* Pie: sugeridos, aviso de enlaces, volver */
.bk-foot { padding: 0 1rem; }
.bk-more-row { display: grid; grid-auto-flow: column; grid-auto-columns: 128px; gap: 1rem; overflow-x: auto; padding-bottom: .5rem; scroll-snap-type: x mandatory; }
.bk-more-row .bk-card { scroll-snap-align: start; }
.bk-more-row .bk-card-cover { border-radius: 2px 3px 3px 2px; }
.bk-more-all { text-align: center; margin-top: .75rem; }
.bk-more-all a { color: var(--bk-ink); font-weight: 600; }
.bk-book .bk-disclosure { max-width: 68ch; margin: 2rem auto 0; font-size: .8rem; }
.bk-book .bk-foot .bk-disclosure { background: none; border: 0; border-top: 1px solid var(--bk-line); border-radius: 0; padding: 1rem 0 0; font-size: .8rem; opacity: .85; }

/* ===== ≥ 641 px ===== */
@media (min-width: 641px) {
  .bk-crumbs-out, .main-hx > .content-card.bk-book { width: calc(100% - 2rem); }
  .bk-band { padding: 1.75rem 2rem 0; }
  .bk-hero { grid-template-columns: clamp(200px, 34%, 270px) 1fr; gap: 2.75rem; }
  .bk-hero-main { justify-content: flex-start; gap: 1.75rem; padding: .25rem 0 1.6rem; }
  .bk-hero-text, .bk-buy { max-width: 600px; }
  .bk-spec { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem 2rem; font-size: 1rem; }
  .bk-spec div { flex-direction: column; gap: .1rem; }
  .bk-spec dt::after { content: none; }
  .bk-buy-btn { height: 54px; }
  .bk-buy-logo { max-height: 36px; }
  .bk-buy-btn.is-ark .bk-buy-logo { max-height: 40px; }
  .bk-body { padding: 0 2rem; }
  .bk-more-row { grid-auto-flow: row; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); grid-auto-columns: auto; overflow: visible; }
  .content-card.bk-book .bk-hero-main h1 { font-size: 2.2rem; }
  .content-card.bk-book .bk-section h2 { font-size: 1.45rem; }
}
@media (min-width: 641px) and (max-width: 1023px) {
  .bk-foot { padding: 0 2rem; }
  .bk-foot .bk-more-row { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}

/* ===== ≥ 1024 px: composición de librería ===== */
@media (min-width: 1024px) {
  .main-hx > .content-card.bk-book { padding-bottom: 0; }
  .content-card.bk-book { --pad: 3rem; --cover: 250px; --colgap: 2.25rem; }
  .bk-band { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 3rem; align-items: start; padding: 2.25rem var(--pad) 0; }
  .bk-hero { grid-template-columns: var(--cover) minmax(0, 1fr); gap: var(--colgap); align-items: start; }
  .bk-hero-main { justify-content: flex-start; gap: 1.4rem; align-self: start; padding: 0 0 2rem; }
  .bk-hero-main h1 { margin: -.2rem 0 .6rem; }
  .content-card.bk-book .bk-hero-main h1 { font-size: 2.05rem; }
  .content-card.bk-book .bk-section h2 { font-size: 1.4rem; }
  .bk-hero-text { max-width: none; }
  .bk-buy { max-width: 340px; }
  .bk-buy-row { max-width: none; }
  .bk-spec { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-spec dt { font-size: .8rem; }
  .bk-buy-btn { height: 50px; }
  .bk-buy-logo { max-height: 32px; }
  .bk-buy-btn.is-ark .bk-buy-logo { max-height: 36px; }
  .bk-details { margin-left: 0; width: 100%; }
  .bk-details.is-side { display: block; max-width: none; margin: 0 0 2rem; align-self: start; border-top: 0; border-color: #C9DCE4; }
  .bk-details.is-side summary { padding: .35rem 0 .9rem; }
  .bk-details.is-side .bk-facts div { border-top-color: #C9DCE4; }
  .bk-details.is-flow { display: none; }
  [data-theme="dark"] .bk-details.is-side, [data-theme="dark"] .bk-details.is-side .bk-facts div { border-color: #2C5566; }
  .bk-body { max-width: none; margin: 0; padding: 2.25rem var(--pad) .5rem calc(var(--pad) + var(--cover) + var(--colgap)); }
  .bk-recommend { margin: 0; }
  .bk-body .bk-recommend, .bk-body .bk-section > p, .bk-body .bk-section > ul { margin-left: 0; max-width: 80ch; text-align: justify; hyphens: auto; }
  .content-card.bk-book .bk-body .bk-section h2, .bk-more h2 { text-align: left; }
  .bk-book .bk-disclosure { margin-left: 0; }
  .bk-foot { padding: .25rem var(--pad) 2rem; border-top: 1px solid var(--bk-line); margin-top: .75rem; }
  .bk-foot .bk-more { margin-top: .75rem; }
  .bk-foot .bk-more-row { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .bk-foot .bk-disclosure { margin-left: 0; max-width: 68ch; }
}

/* ===== Variante «portada que sobresale» (.is-cover-pop; la sombra oscura rige en todos los anchos, el resto ≥ 1024 px) ===== */
[data-theme="dark"] .is-cover-pop .bk-book-cover { box-shadow: 0 2px 6px rgba(0,0,0,.6), 0 20px 40px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.04); }
@media (min-width: 1024px) {
  .content-card.bk-book.is-cover-pop { --cover: 375px; --overhang: calc(var(--cover) * 1.5 * .45); }
  .is-cover-pop .bk-band { padding-top: 2rem; }
  .is-cover-pop .bk-hero-cover { align-self: start; position: relative; z-index: 2; margin-bottom: calc(-1 * var(--overhang)); }
  .is-cover-pop .bk-book-cover { box-shadow: 0 2px 4px rgba(0,0,0,.2), 0 18px 36px rgba(0,0,0,.22); }
  .is-cover-pop .bk-hero-main { padding-bottom: 1.75rem; }
  .is-cover-pop .bk-details.is-side { margin-bottom: 1.75rem; }
  .is-cover-pop .bk-body { min-height: calc(var(--overhang) + .5rem); padding-top: 1.25rem; padding-bottom: 0; }
  .is-cover-pop .bk-main > .bk-section:first-child { margin-top: .75rem; }
}
@media (min-width: 1024px) and (max-width: 1279px) {
  .content-card.bk-book.is-cover-pop { --cover: 300px; --pad: 2.25rem; --colgap: 1.75rem; }
  .is-cover-pop .bk-band { grid-template-columns: minmax(0, 1fr) 240px; gap: 2rem; }
}

/* Flechas laterales prev/siguiente entre fichas (book-nav.js) */
.bk-navarrow { position: fixed; top: 50%; transform: translateY(-50%); z-index: 40; width: 2.6rem; height: 4.2rem; display: flex; align-items: center; justify-content: center; font-size: 2.4rem; line-height: 1; text-decoration: none; color: var(--color-text); background: var(--color-surface); border: 1px solid var(--color-border); box-shadow: 0 2px 8px rgba(0,0,0,.25); opacity: .85; }
.bk-navarrow.is-prev { left: 0; border-radius: 0 10px 10px 0; border-left: 0; }
.bk-navarrow.is-next { right: 0; border-radius: 10px 0 0 10px; border-right: 0; }
.bk-navarrow:hover, .bk-navarrow:focus-visible { opacity: 1; color: var(--color-accent-warm); }
.bk-navarrow.is-off { display: none; }
@media (max-width: 700px) { .bk-navarrow { width: 1.7rem; height: 3rem; font-size: 1.8rem; opacity: .6; } }

/* Edad y género de la ficha técnica enlazan a su estantería (edad/tema) */
.bk-spec dd a, .bk-facts dd a { color: inherit; text-decoration: none; }
.bk-facts dd a { color: var(--bk-ink); text-decoration: underline; text-underline-offset: 3px; }
.bk-spec dd a:hover, .bk-spec dd a:focus-visible { text-decoration: underline; text-underline-offset: 3px; }
.bk-facts dd a:hover, .bk-facts dd a:focus-visible { color: var(--color-gold-text, var(--bk-ink)); }