@font-face { font-family: 'Inter'; src: url('inter-latin-variable.woff2') format('woff2'); font-weight: 100 900; font-display: swap; }

:root {
  --papel: #f6f5f1;
  --tinta: #141414;
  --tinta-suave: #4a4946;
  --luz: #c99a2e;
  --gris: #8d8b86;
  --tr: 240ms;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0; background: var(--papel); color: var(--tinta);
  font-family: 'Inter', system-ui, sans-serif; font-size: 17px; line-height: 1.45;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
body.en-oscura { background: var(--tinta); }
body.en-oscura #capitulos { color: var(--papel); }
body.en-oscura #capitulos button { border-color: rgba(246,245,241,.35); }
body.en-oscura #capitulos button.activo { background: var(--papel); color: var(--tinta); }
body.en-oscura #progreso { background: var(--papel); }

#recorrido { position: relative; width: 100%; }

#escenario { position: fixed; inset: 0; overflow: hidden; }
.esc { position: absolute; inset: 0; will-change: transform; background: var(--papel); visibility: hidden; }
.esc.oscura { background: var(--tinta); }
.esc svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* capas ilustradas */
.marco { position: absolute; left: 50%; top: 50%; width: 1600px; height: 900px; transform: translate(-50%,-50%); transform-origin: center; pointer-events: none; perspective: 1500px; perspective-origin: 50% 50%; }
.vista { position: absolute; inset: 0; transform-style: preserve-3d; transform-origin: 50% 50%; will-change: transform; }
.capa-img { position: absolute; will-change: transform; transform-origin: 800px 450px; --r: 0;
  -webkit-mask-image: linear-gradient(104deg, #000 0, #000 calc(var(--r) * 130% - 30%), transparent calc(var(--r) * 130%)); mask-image: linear-gradient(104deg, #000 0, #000 calc(var(--r) * 130% - 30%), transparent calc(var(--r) * 130%)); }
.capa-img img { display: block; width: 100%; height: auto; }
.capa-img img.pose-b { position: absolute; left: 0; top: 0; opacity: 0; }
.capa-img.vineta { background: var(--papel); border: 3px solid var(--tinta); box-shadow: 8px 8px 0 rgba(20,20,20,.08); overflow: hidden; opacity: 0; -webkit-mask-image: none; mask-image: none; transform-origin: center; }
.capa-img.vineta img { width: 100%; height: 100%; object-fit: cover; }
.esc.oscura .capa-img img { filter: invert(1); }
.esc.oscura .capa-img.vineta { background: var(--tinta); border-color: var(--papel); box-shadow: 8px 8px 0 rgba(246,245,241,.1); }
body.todo .capa-img { --r: 1 !important; }

/* trazos */
.tr { fill: none; stroke: var(--tinta); stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; stroke-dashoffset: 1; }
.ma { fill: var(--tinta); stroke: none; opacity: 0; }
.rotulo { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 13px; fill: var(--tinta); letter-spacing: .01em; }
.rotulo.mano { font-weight: 450; font-style: italic; }
.pan { opacity: 0; }
.panbg { fill: var(--papel); }
.esc.oscura .panbg { fill: var(--tinta); }

/* cabecera y pie */
header { position: fixed; top: 0; left: 0; right: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; padding: 22px 28px; pointer-events: none; color: #fff; mix-blend-mode: difference; }
header > * { pointer-events: auto; }
.marca { font-weight: 640; letter-spacing: -.01em; font-size: 15px; line-height: 1.1; text-decoration: none; color: inherit; }
.marca small { display: block; font-weight: 450; font-size: 10px; letter-spacing: .14em; margin-top: 3px; }
nav { display: flex; gap: 6px; align-items: center; }
nav a, nav button { font: inherit; font-size: 13px; font-weight: 500; color: inherit; background: none; border: 0; padding: 8px 12px; cursor: pointer; text-decoration: none; border-radius: 999px; transition: background var(--tr); }
nav a:hover, nav button:hover { background: rgba(255,255,255,.14); }
nav button.activo { background: #fff; color: #000; }
nav button:focus-visible, nav a:focus-visible, .btn:focus-visible, #capitulos button:focus-visible { outline: 2px solid var(--luz); outline-offset: 2px; }

#capitulos { position: fixed; left: 0; right: 0; bottom: 0; z-index: 10; display: flex; gap: 2px; justify-content: center; padding: 14px 20px 18px; transition: color var(--tr); }
#capitulos button b { font-weight: inherit; }
#capitulos button { font: inherit; font-size: 11.5px; letter-spacing: .02em; color: inherit; background: none; border: 1px solid rgba(20,20,20,.22); border-radius: 999px; padding: 5px 11px; cursor: pointer; opacity: .75; transition: all var(--tr); }
#capitulos button.activo { background: var(--tinta); color: var(--papel); opacity: 1; border-color: transparent; }
#progreso { position: fixed; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--tinta); transform-origin: left; transform: scaleX(0); z-index: 11; }

/* capa de texto */
.capa { position: absolute; inset: 0; pointer-events: none; }
.capa a { pointer-events: auto; }
.txt, .titulo { position: absolute; opacity: 0; will-change: opacity, transform; }
.txt.caja { max-width: 38ch; background: var(--papel); border: 1.5px solid var(--tinta); padding: 14px 18px 15px; font-size: 16.5px; line-height: 1.42; box-shadow: 6px 6px 0 rgba(20,20,20,.06); }
.esc.oscura .txt.caja { box-shadow: 6px 6px 0 rgba(246,245,241,.08); }
.txt.caja p { margin: 0; }
.txt.caja em { font-style: normal; font-weight: 600; color: var(--luz); }
.txt.grande { max-width: 11em; font-weight: 640; font-size: clamp(30px, 4.6vw, 74px); line-height: .98; letter-spacing: -.035em;
  /* halo de papel: la frase grande se lee también sobre tinta densa */
  text-shadow: 0 0 2px var(--papel), 0 0 6px var(--papel), 0 0 14px var(--papel), 0 0 28px var(--papel), 0 0 28px var(--papel); }
.txt.grande.claro { text-shadow: 0 0 2px var(--tinta), 0 0 6px var(--tinta), 0 0 14px var(--tinta), 0 0 28px var(--tinta), 0 0 28px var(--tinta); }
.esc.oscura .txt.grande { text-shadow: 0 0 2px var(--tinta), 0 0 6px var(--tinta), 0 0 14px var(--tinta), 0 0 28px var(--tinta), 0 0 28px var(--tinta); }
.txt.grande p { margin: 0; }
.txt.grande.claro, .titulo.claro { color: var(--papel); }
.titulo { font-weight: 640; font-size: clamp(22px, 2.2vw, 34px); letter-spacing: -.03em; line-height: 1; color: var(--tinta); }
.titulo::before { content: ''; display: block; width: 26px; height: 2px; background: currentColor; margin-bottom: 12px; }

/* posiciones */
.p-tl { top: 14vh; left: 5vw; }
.p-tr { top: 12vh; right: 5vw; text-align: right; }
.p-tr::before { margin-left: auto; }
.p-tr2 { top: 15vh; right: 6vw; }
.p-bl { bottom: 13vh; left: 5vw; }
.p-br { bottom: 13vh; right: 6vw; }
.p-cl { top: 50%; left: 5vw; transform: translateY(-50%); }
.p-cr { top: 46%; right: 5vw; text-align: right; }

/* bloques HTML: portada y cierre */
.bloque { position: absolute; inset: 0; opacity: 0; }
.hero { position: absolute; left: 6vw; top: 50%; transform: translateY(-56%); }
.hero h1 { margin: 0; font-weight: 640; font-size: clamp(40px, 6.2vw, 104px); line-height: .96; letter-spacing: -.04em; max-width: 12em; }
.hero .sub { margin: 26px 0 0 4px; font-size: 18px; color: var(--tinta-suave); }
.hero .desliza { margin: 54px 0 0 4px; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--gris); }
.hero .desliza::after { content: ''; display: inline-block; width: 1px; height: 34px; background: var(--gris); margin-left: 14px; vertical-align: middle; animation: cae 1.8s ease-in-out infinite; }
@keyframes cae { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

.final { position: absolute; left: 6vw; right: 6vw; top: 50%; transform: translateY(-50%); max-width: 1100px; }
.final .aviso { margin: 0 0 34px; font-size: 16.5px; max-width: 36ch; border-left: 2px solid var(--luz); padding-left: 14px; color: var(--tinta-suave); }
.final h2 { margin: 0; font-weight: 640; font-size: clamp(40px, 7vw, 120px); line-height: .92; letter-spacing: -.04em; }
.final .rol { margin: 10px 0 0 2px; font-size: 16px; color: var(--tinta-suave); }
.final .invita { margin: 36px 0 0; font-size: clamp(19px, 2vw, 26px); line-height: 1.3; max-width: 30ch; }
.final .acciones { margin: 34px 0 0; display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-block; font-weight: 560; font-size: 15px; text-decoration: none; color: var(--papel); background: var(--tinta); padding: 13px 22px; border-radius: 999px; transition: transform var(--tr); }
.btn:hover { transform: translateY(-1px); }
.btn.sec { color: var(--tinta); background: transparent; border: 1.5px solid var(--tinta); }

/* modo sin animación: todo visible */
body.todo .pan, body.todo .txt, body.todo .titulo, body.todo .bloque { opacity: 1 !important; transform: none !important; }
body.todo .hero .desliza::after { animation: none; }

/* móvil */
@media (max-width: 760px) {
  body { font-size: 16px; }
  header { padding: 14px 14px; }
  nav a { display: none; }
  nav a#btn-idioma { display: inline-block; }
  nav button { padding: 6px 9px; font-size: 11px; white-space: nowrap; }
  .marca { white-space: nowrap; font-size: 13px; }
  nav { gap: 6px; }
  .txt.caja { max-width: calc(100vw - 28px); font-size: 14.5px; line-height: 1.38; padding: 11px 13px; }
  .p-tl, .p-tr2 { top: 10.5vh; left: 14px; right: 14px; }
  .p-bl, .p-br { top: auto; bottom: 8vh; left: 14px; right: 14px; }
  .p-cl, .p-cr { top: 19vh; bottom: auto; left: 14px; right: 14px; transform: none; text-align: left; }
  .p-tr { top: 10vh; right: 14px; left: auto; }
  .txt.grande { max-width: 8.5em; font-size: clamp(30px, 9.5vw, 48px); }
  .txt.grande.p-tr2, .txt.grande.p-tl { top: 19vh; }
  .titulo { top: 9vh; font-size: 20px; }
  .hero { left: 16px; right: 16px; transform: translateY(-50%); }
  .hero h1 { font-size: clamp(36px, 11vw, 48px); max-width: none; }
  .hero .sub { font-size: 16px; margin-top: 18px; }
  .final { left: 16px; right: 16px; }
  .final h2 { font-size: clamp(36px, 11vw, 56px); }
  #capitulos { padding: 8px 6px 12px; flex-wrap: wrap; gap: 3px; }
  #capitulos button { font-size: 11px; padding: 5px 10px; }
  #capitulos button span { display: none; }
  #capitulos button.activo span { display: inline; }
  body.vertical .txt.m-arriba { top: 10.5vh; bottom: auto; left: 14px; right: 14px; transform: none; text-align: left; }
  body.vertical .txt.m-abajo { top: auto; bottom: 9vh; left: 14px; right: 14px; transform: none; text-align: left; }
  body.vertical .txt.grande.m-arriba { top: 17vh; }
  body.vertical .txt.grande.m-abajo { bottom: 11vh; }
}
@media (prefers-reduced-motion: reduce) { .hero .desliza::after { animation: none; } }