/* =====================================================================
   Bitácora · Aprendecatalan
   Estils compartits per a tots els tipus d'entrada. Minimalista i actual.
   La tipografia i els colors s'hereten del web: per adaptar-los, canvieu
   NOMÉS els tokens de .bt (a baix).
   ===================================================================== */

.bt {
  /* ---- Tokens: mapeu-los a les variables del web ---- */
  --bt-ink: #2E2C2A;
  --bt-muted: #6B6863;
  --bt-line: #E4E1DC;
  --bt-accent: rgb(38,110,82);
  --bt-accent-soft: rgba(110,190,160,.18);
  --bt-surface: #F2F0EC;
  --bt-page: #FAFAF9;
  --bt-radius: 14px;
  --bt-font: 'Source Serif 4', Georgia, serif;
  --bt-font-display: 'Archivo', system-ui, sans-serif;
  --bt-measure: 66ch;

  font-family: var(--bt-font);
  color: var(--bt-ink);
  font-size: 1.0625rem;
  line-height: 1.75;
  max-width: 760px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
}
.bt *, .bt *::before, .bt *::after { box-sizing: border-box; }
.bt img, .bt video, .bt iframe { max-width: 100%; display: block; }
.bt a { color: var(--bt-accent); text-underline-offset: .2em; text-decoration-thickness: 1px; }

/* ---------- Capçalera ---------- */
.bt-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: .6rem;
  margin: 0 0 1.4rem; font-size: .85rem; color: var(--bt-muted);
}
.bt-meta .bt-tipus {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .28rem .75rem .28rem .6rem; border-radius: 999px;
  background: var(--bt-accent-soft); color: var(--bt-accent);
  font-weight: 600; line-height: 1.2;
}
.bt-meta .bt-tipus::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.bt-titol {
  font-family: var(--bt-font-display);
  font-size: clamp(2.1rem, 5.4vw, 3.4rem);
  font-weight: 650; line-height: 1.04; letter-spacing: -.035em;
  margin: 0 0 1.1rem; text-wrap: balance;
}
.bt-entradeta {
  font-size: clamp(1.1rem, 2.2vw, 1.28rem); line-height: 1.5;
  color: var(--bt-muted); margin: 0 0 2rem; max-width: 56ch; text-wrap: pretty;
}
.bt-signatura {
  display: flex; flex-wrap: wrap; gap: .4rem 2.4rem;
  margin: 0 0 2.6rem; padding-top: 1.1rem;
  border-top: 1px solid var(--bt-line);
  font-size: .9rem; line-height: 1.4;
}
.bt-signatura > span { display: block; }
.bt-signatura b { display: block; font-weight: 400; color: var(--bt-muted); font-size: .82rem; margin-bottom: .15rem; }
.bt-signatura .bt-sep { display: none; }

/* ---------- Cos ---------- */
.bt-cos { max-width: var(--bt-measure); }
.bt-cos p { margin: 0 0 1.25em; text-wrap: pretty; }
.bt-cos h2 {
  font-family: var(--bt-font-display); font-weight: 650; letter-spacing: -.02em;
  font-size: 1.45rem; line-height: 1.25; margin: 2.4em 0 .7em;
}
.bt-cos blockquote {
  margin: 2.4rem 0; padding: 0;
  font-family: var(--bt-font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem); line-height: 1.3; font-weight: 550; letter-spacing: -.02em;
}
.bt-cos blockquote::before { content: ""; display: block; width: 32px; height: 3px; border-radius: 2px; background: var(--bt-accent); margin-bottom: 1rem; }
.bt-cos blockquote p { margin: 0; }

/* ---------- Figures ---------- */
.bt-figura { margin: 0 0 2.2rem; }
.bt-figura img { width: auto; max-width: 100%; height: auto; max-height: 82svh; margin: 0 auto; border-radius: var(--bt-radius); cursor: zoom-in; background: var(--bt-surface); }
.bt-figura figcaption { margin-top: .6rem; font-size: .84rem; color: var(--bt-muted); }
.bt-portada { margin-bottom: 2.8rem; }
.bt-figures { display: grid; gap: 1rem; margin: 2.4rem 0; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.bt-figures .bt-figura { margin: 0; }
.bt-figures img { aspect-ratio: 4 / 3; object-fit: cover; }

/* Poema */
.bt--poema .bt-meta, .bt--poema .bt-signatura { justify-content: center; }
.bt--poema .bt-signatura > span { text-align: center; }
.bt--poema .bt-titol, .bt--poema .bt-entradeta { text-align: center; margin-left: auto; margin-right: auto; }
.bt--poema .bt-portada { max-width: 440px; margin-left: auto; margin-right: auto; }
.bt--poema .bt-cos { margin: 0 auto; max-width: 30ch; }
.bt-poema p { margin: 0 0 1.8em; font-size: 1.18rem; line-height: 1.85; }

/* Notícia */
.bt--noticia .bt-cos p:first-child { font-weight: 600; }

/* ---------- Veu d'alumne ---------- */
.bt-veu {
  display: grid; gap: 1.25rem; align-items: center; grid-template-columns: auto 1fr;
  margin: 0 0 2.8rem; padding: 1.25rem 1.4rem;
  border: 1px solid var(--bt-line); border-radius: calc(var(--bt-radius) + 6px);
}
.bt-veu-foto { width: 76px; height: 76px; border-radius: 50%; object-fit: cover; }
.bt-veu-nom { margin: 0; font-weight: 600; line-height: 1.3; }
.bt-veu-rol { margin: 0 0 .8rem; font-size: .88rem; color: var(--bt-muted); }
.bt-veu--video { display: block; padding: 0; border: 0; }
.bt-video { position: relative; aspect-ratio: 16 / 9; border-radius: var(--bt-radius); overflow: hidden; background: #000; }
.bt-video iframe, .bt-video video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.bt-video--vertical { aspect-ratio: 9 / 16; max-width: 360px; margin: 0 auto; }
.bt-veu-peu { margin: .8rem 0 0; font-size: .9rem; }

.bt-audio { display: flex; align-items: center; gap: .9rem; }
.bt-audio audio { display: none; }
.bt-audio--nojs audio { display: block; width: 100%; }
.bt-play {
  flex: none; width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--bt-ink); color: #fff; display: grid; place-items: center;
  transition: transform .15s ease;
}
.bt-play:hover { transform: scale(1.06); }
.bt-play:focus-visible { outline: 2px solid var(--bt-accent); outline-offset: 3px; }
.bt-play svg { width: 16px; height: 16px; }
.bt-ona { position: relative; flex: 1; min-width: 0; height: 36px; --p: 0%; }
.bt-ona-barres { position: absolute; inset: 0; display: flex; align-items: center; gap: 2px; }
.bt-ona-barres i { flex: 1; border-radius: 2px; background: var(--bt-line); }
.bt-ona-barres i.is-on { background: var(--bt-accent); }
.bt-ona .bt-audio-barra {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer;
}
.bt-ona:focus-within { outline: 2px solid var(--bt-accent); outline-offset: 4px; border-radius: 4px; }
.bt-audio-temps { font-variant-numeric: tabular-nums; font-size: .85rem; color: var(--bt-muted); min-width: 3em; text-align: right; }

.bt-transcripcio { margin: 2.4rem 0 0; border-top: 1px solid var(--bt-line); padding-top: 1.1rem; }
.bt-transcripcio summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
.bt-transcripcio summary::-webkit-details-marker { display: none; }
.bt-transcripcio summary::after { content: "+"; font-weight: 400; color: var(--bt-muted); }
.bt-transcripcio[open] summary::after { content: "–"; }
.bt-transcripcio[open] summary { margin-bottom: 1rem; }

/* ---------- Podcast ---------- */
.bt-escolta { margin: 0 0 2.8rem; }
.bt-spotify iframe { width: 100%; border: 0; border-radius: var(--bt-radius); }
.bt-spotify-buit {
  display: grid; place-items: center; min-height: 152px; padding: 1rem;
  background: var(--bt-surface); border-radius: var(--bt-radius);
  color: var(--bt-muted); text-align: center; font-size: .9rem;
}
.bt-plataformes { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin: 1rem 0 0; font-size: .88rem; }
.bt-plataformes span { color: var(--bt-muted); margin-right: .3rem; }
.bt-plataformes a {
  text-decoration: none; color: var(--bt-ink);
  padding: .35rem .85rem; border: 1px solid var(--bt-line); border-radius: 999px;
}
.bt-plataformes a:hover { border-color: var(--bt-ink); }

/* ---------- Galeria · llibre ---------- */
.bt--galeria { max-width: 1040px; }
.bt--galeria > :not(.bt-llibre) { max-width: 760px; margin-left: auto; margin-right: auto; }
.bt-llibre { margin: 0 0 3rem; }
.bt-llibre-escenari { position: relative; overflow: hidden; padding: 1.2rem 0 1.6rem; touch-action: pan-y; }
.bt-llibre-obert {
  position: relative; margin: 0 auto; width: 100%; max-width: 980px;
  aspect-ratio: 2 / 1.12;
  perspective: 2400px; -webkit-perspective: 2400px;
  transition: transform .6s cubic-bezier(.3,.7,.2,1);
  user-select: none; -webkit-user-select: none;
}
.bt-llibre--single .bt-llibre-obert { max-width: 460px; aspect-ratio: 3 / 4.6; }

/* Pàgines fixes (les visibles) */
.bt-slot {
  position: absolute; top: 0; height: 100%; width: 50%; overflow: hidden;
  background: var(--bt-page); color: var(--bt-ink); border: 1px solid var(--bt-line);
}
.bt-slot--esq { left: 0; border-radius: 12px 0 0 12px; box-shadow: inset -18px 0 22px -20px rgba(0,0,0,.22); }
.bt-slot--dre { left: 50%; border-radius: 0 12px 12px 0; box-shadow: inset 18px 0 22px -20px rgba(0,0,0,.22); }
.bt-slot.is-buit { visibility: hidden; }
.bt-llibre--single .bt-slot--esq { display: none; }
.bt-llibre--single .bt-slot--dre { left: 0; width: 100%; border-radius: 12px; box-shadow: none; }

/* El full que gira */
.bt-full {
  position: absolute; top: 0; left: 50%; width: 50%; height: 100%; z-index: 2;
  transform-origin: left center; transform-style: preserve-3d; -webkit-transform-style: preserve-3d;
  transform: rotateY(0deg);
  transition: transform .72s cubic-bezier(.45,.05,.25,1);
  will-change: transform;
}
.bt-llibre--single .bt-full { left: 0; width: 100%; transition: transform .72s cubic-bezier(.45,.05,.25,1), opacity .72s ease-in; }
.bt-full.is-girada { transform: rotateY(-180deg); }
.bt-llibre--single .bt-full.is-girada { opacity: 0; }
.bt-full.sense-transicio { transition: none; }
.bt-cara {
  position: absolute; inset: 0; overflow: hidden;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  background: var(--bt-page); color: var(--bt-ink); border: 1px solid var(--bt-line);
}
.bt-cara--davant { transform: rotateY(0deg); border-radius: 0 12px 12px 0; box-shadow: inset 18px 0 22px -20px rgba(0,0,0,.22); }
.bt-cara--darrere { transform: rotateY(180deg); border-radius: 12px 0 0 12px; box-shadow: inset -18px 0 22px -20px rgba(0,0,0,.22); }
.bt-llibre--single .bt-cara { border-radius: 12px; box-shadow: 0 10px 30px -18px rgba(0,0,0,.35); }

.bt-pagina { position: absolute; inset: 0; padding: clamp(1.2rem, 5.5%, 2.8rem); display: flex; flex-direction: column; overflow: auto; }
.bt-pagina--imatge { padding: clamp(.8rem, 4%, 2rem); justify-content: center; align-items: center; }
.bt-pagina--imatge img { width: 100%; height: 100%; object-fit: contain; cursor: zoom-in; border-radius: 6px; }
.bt-pagina--portada { justify-content: flex-end; background: var(--bt-ink); color: #fff; }
.bt-pagina--portada .bt-p-tipus { margin: 0 0 auto; font-size: .8rem; opacity: .6; }
.bt-pagina--portada h3 {
  font-family: var(--bt-font-display); font-weight: 650; letter-spacing: -.035em;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem); line-height: 1.02; margin: 0 0 1rem; text-wrap: balance;
}
.bt-pagina--portada p { margin: 0; max-width: 30ch; font-size: .95rem; line-height: 1.5; opacity: .75; }
.bt-p-pista { margin-top: 1.6rem !important; font-size: .8rem !important; opacity: .5 !important; }
.bt-pagina--peu { justify-content: flex-end; font-size: clamp(.84rem, 1.45vw, 1rem); line-height: 1.55; }
.bt-p-num { font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 650; letter-spacing: -.05em; line-height: 1; margin: 0 0 auto; color: var(--bt-line); font-variant-numeric: tabular-nums; }
.bt-p-nom { font-family: var(--bt-font-display); font-weight: 650; letter-spacing: -.02em; font-size: 1.4em; line-height: 1.15; margin: 0 0 .6rem; }
.bt-p-dades { margin: 0 0 1.2rem; display: flex; flex-wrap: wrap; gap: .35rem; }
.bt-p-dades > span { display: inline-block; font-size: .78rem; padding: .2rem .65rem; border-radius: 999px; background: var(--bt-surface); }
.bt-p-dades b { font-weight: 400; color: var(--bt-muted); margin-right: .15rem; }
.bt-p-cita { margin: 0; font-size: 1.05em; }
.bt-p-trad { margin: .8rem 0 0; color: var(--bt-muted); font-size: .9em; }
.bt-pagina--fi { justify-content: center; align-items: center; text-align: center; }
.bt-pagina--fi p { margin: 0; color: var(--bt-muted); font-size: .9rem; }
.bt-pagina--combi { gap: .9rem; font-size: .9rem; line-height: 1.5; padding: .9rem .9rem 1.1rem; }
.bt-pagina--combi img { flex: 1 1 0; min-height: 40%; width: 100%; object-fit: contain; cursor: zoom-in; border-radius: 6px; }
.bt-combi-text { flex: 0 1 auto; overflow: auto; }
.bt-combi-text .bt-p-num { display: none; }
.bt-combi-text .bt-p-nom { font-size: 1.2em; margin-bottom: .4rem; }
.bt-combi-text .bt-p-dades { margin-bottom: .6rem; }

.bt-llibre-nav { display: flex; align-items: center; justify-content: center; gap: .75rem; }
.bt-llibre-nav button {
  width: 44px; height: 44px; border-radius: 50%; cursor: pointer;
  border: 1px solid var(--bt-line); background: var(--bt-page); color: var(--bt-ink);
  display: grid; place-items: center; transition: border-color .15s ease;
}
.bt-llibre-nav button:hover:not(:disabled) { border-color: var(--bt-ink); }
.bt-llibre-nav button:disabled { opacity: .35; cursor: default; }
.bt-llibre-nav button:focus-visible, .bt-llibre-obert:focus-visible { outline: 2px solid var(--bt-accent); outline-offset: 4px; }
.bt-llibre-nav svg { width: 16px; height: 16px; }
.bt-llibre-comptador {
  position: relative; min-width: 8.5rem; text-align: center;
  font-size: .82rem; color: var(--bt-muted); font-variant-numeric: tabular-nums; padding-bottom: .55rem;
}
.bt-llibre-comptador::before, .bt-llibre-comptador::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; border-radius: 2px;
}
.bt-llibre-comptador::before { right: 0; background: var(--bt-line); }
.bt-llibre-comptador::after { width: var(--bt-prog, 0%); background: var(--bt-ink); transition: width .6s ease; }

/* Sense JS */
.bt-llibre-font { display: grid; gap: 1rem; }
.bt-llibre-font .bt-pagina { position: static; min-height: 240px; border: 1px solid var(--bt-line); border-radius: var(--bt-radius); }
.bt-llibre.is-llest .bt-llibre-font { display: none; }
.bt-llibre:not(.is-llest) .bt-llibre-escenari, .bt-llibre:not(.is-llest) .bt-llibre-nav { display: none; }

/* ---------- Visor ---------- */
.bt-visor { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 94vh; }
.bt-visor::backdrop { background: rgba(10,10,12,.9); backdrop-filter: blur(6px); }
.bt-visor img { max-width: 96vw; max-height: 86vh; width: auto; height: auto; margin: 0 auto; border-radius: 8px; }
.bt-visor button { display: block; margin: .9rem auto 0; font: inherit; font-size: .9rem; padding: .45rem 1.3rem; border: 0; border-radius: 999px; background: #fff; color: #111; cursor: pointer; }

/* ---------- Targeta per a la llista ---------- */
.bt-targeta { display: block; color: inherit; text-decoration: none; }
.bt-targeta img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--bt-radius); margin-bottom: 1.1rem; transition: opacity .2s ease; }
.bt-targeta:hover img { opacity: .9; }
.bt-targeta .bt-meta { margin-bottom: .9rem; }
.bt-targeta h2 { font-family: var(--bt-font-display); font-weight: 650; letter-spacing: -.025em; font-size: 1.5rem; line-height: 1.15; margin: 0 0 .5rem; }
.bt-targeta p { margin: 0 0 1rem; color: var(--bt-muted); }
.bt-targeta .bt-signatura { margin: 0; }

@media (max-width: 560px) {
  .bt { font-size: 1.03rem; }
  .bt-meta { margin-bottom: 1rem; }
  .bt-titol { font-size: clamp(1.9rem, 8.6vw, 2.4rem); }
  .bt-entradeta { margin-bottom: 1.5rem; }
  .bt-signatura { gap: .8rem 1.8rem; margin-bottom: 2rem; }
  .bt-portada { margin-bottom: 2rem; }
  .bt-veu { grid-template-columns: auto 1fr; gap: .15rem 1rem; padding: 1rem; }
  .bt-veu > div { display: contents; }
  .bt-veu-foto { grid-column: 1; grid-row: 1 / span 2; width: 52px; height: 52px; }
  .bt-veu-nom { grid-column: 2; grid-row: 1; align-self: end; }
  .bt-veu-rol { grid-column: 2; grid-row: 2; margin: 0; align-self: start; }
  .bt-veu:not(:has(.bt-veu-foto)) .bt-veu-nom, .bt-veu:not(:has(.bt-veu-foto)) .bt-veu-rol { grid-column: 1 / -1; }
  .bt-veu .bt-audio { grid-column: 1 / -1; grid-row: 3; margin-top: .9rem; }
  .bt-veu--video { display: block; padding: 0; }
  .bt-veu--video > div { display: block; }
  .bt-plataformes span { flex-basis: 100%; }
  .bt-cos blockquote { margin: 2rem 0; }
  .bt-pagina--combi { padding: .9rem .9rem 1.1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .bt-llibre-obert, .bt-llibre-comptador::after { transition: none; }
}