:root { color-scheme: dark; background: #181512; color: #fff6e8; font: 16px/1.5 system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main { max-width: 81rem; margin: auto; padding: .65rem clamp(.65rem, 2vw, 1.5rem); }
header { display: flex; gap: .5rem 1rem; align-items: baseline; flex-wrap: wrap; }
header a { color: #ffd79a; }
h1 { margin: 0 0 .5rem; font-size: clamp(1.25rem, 3vw, 1.85rem); }
.diapositiva { position: relative; }
img { display: block; width: 100%; height: auto; }
.zona { position: absolute; border-radius: .4rem; }
.zona:hover, .zona:focus-visible { outline: 2px solid #fff4cb; outline-offset: -3px; background: #fff4cb17; }
nav { display: flex; flex-wrap: wrap; gap: .55rem; margin-block: .8rem; }
nav a, button { border: 1px solid #b68b58; border-radius: .4rem; padding: .55rem .85rem; color: #fff6e8; background: #39291c; }
nav a:hover, button:hover { background: #62442b; }
a:focus-visible, button:focus-visible { outline: 2px solid #ffdc9a; outline-offset: 2px; }
button { cursor: pointer; font: inherit; }
button.zona { background: transparent; border: 0; padding: 0; }
button.zona:hover, button.zona:focus-visible { background: #fff4cb17; }
body.pagina-lectura {
  color-scheme: light;
  background: #f5efe3;
  color: #28221d;
  min-height: 100vh;
  text-align: center;
  font-size: clamp(1.25rem, 1rem + 1.25vw, 2.15rem);
}
.pagina-lectura main {
  max-width: 33em;
  padding: clamp(1rem, 4vw, 3rem) clamp(1rem, 5vw, 2.5rem);
}
.pagina-lectura h1 { font-size: 1.6em; }
.pagina-lectura figure { margin: 1.25em 0; }
.pagina-lectura blockquote {
  margin: 0;
  font-family: Georgia, serif;
  font-size: 1em;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.pagina-lectura blockquote p { margin: 0 0 1.15em; }
.pagina-lectura figcaption {
  border-top: 1px solid #ddd4ca;
  margin-top: 1.4em;
  padding-top: .75em;
  font-size: .85em;
}
.continuar-lectura {
  display: inline-block;
  font-size: .9em;
  border-radius: .4rem;
  padding: .65rem 1.35rem;
  background: #39291c;
  color: #fff;
  text-decoration: none;
}
.continuar-lectura:hover { background: #62442b; }

.diapositiva:has(.titulo-portada) { container-type: inline-size; }
.titulo-portada {
  position: absolute;
  left: 5%;
  top: 27%;
  font-size: 7cqw;
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1;
  color: #ffe0a1;
  text-shadow: 0 .035em .025em #793918, 0 .06em .13em #54251b;
  pointer-events: none;
}

main:has(.diapositiva) { max-width: none; }
.diapositiva {
  width: min(100%, calc(max(12rem, 100vh - 7rem) * var(--proporcion, 1.634)));
  width: min(100%, calc(max(12rem, 100dvh - 7rem) * var(--proporcion, 1.634)));
  margin-inline: auto;
}

.visor-diapos h1 {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.visor-diapos .diapositiva {
  width: min(100%, calc(max(12rem, 100vh - 1.3rem) * var(--proporcion, 1.634)));
  width: min(100%, calc(max(12rem, 100dvh - 1.3rem) * var(--proporcion, 1.634)));
}

body.entrada { height: 100vh; height: 100dvh; overflow: hidden; }
.entrada iframe { display: block; width: 100%; height: 100%; border: 0; }
.bienvenida {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: #181512f5;
  text-align: center;
}
.bienvenida[hidden] { display: none; }
.bienvenida p { max-width: 30rem; }
#comenzar-normal { display: block; margin: 1rem auto; }
#pantalla-completa { position: fixed; right: .5rem; top: .5rem; z-index: 5; padding: .1rem .5rem; }

.pagina-lectura { height: 100vh; height: 100dvh; }
.pagina-lectura main {
  font-size: var(--tamano-lectura, clamp(1.25rem, min(3vw, 4.5vh), 2.75rem));
  width: 100%;
  max-width: 58rem;
  height: 100%;
  padding: clamp(.75rem, 2.5vh, 2rem) clamp(1rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: safe center;
  overflow: auto;
}
.pagina-lectura main > * { flex-shrink: 0; }
.pagina-lectura h1 { font-size: 1.2em; margin: 0 0 .45em; }
.pagina-lectura figure { width: 100%; margin: .5em 0; }
.pagina-lectura blockquote { line-height: 1.4; }
.pagina-lectura blockquote p { margin: 0 0 .75em; }
.pagina-lectura blockquote p:last-child { margin-bottom: 0; }
.pagina-lectura figcaption { margin-top: .8em; padding-top: .5em; font-size: .7em; }
.pagina-lectura .continuar-lectura { font-size: .7em; padding: .5em 1em; margin-top: .6em; }

.visor-diapos #audio-estado:not([hidden]) {
  position: fixed;
  bottom: .4rem;
  left: 50%;
  transform: translateX(-50%);
  max-width: 90%;
  margin: 0;
  padding: .3rem .6rem;
  border-radius: .3rem;
  background: #181512e8;
  color: #fff6e8;
  font-size: .85rem;
  pointer-events: none;
}

.boton-entrada {
  display: inline-block;
  color: #fff6e8;
  background: #39291c;
  border: 1px solid #b68b58;
  border-radius: .4rem;
  padding: .75rem 1rem;
  text-decoration: none;
  min-height: 44px;
  touch-action: manipulation;
}
.bienvenida { z-index: 10; }