/* Landing «observatorio del tiempo». Escena fija detrás; el contenido es HTML accesible.
   Movimiento: la capa de reducción está al final y sigue la regla de app.js (data-movimiento). */
@font-face { font-family: "Literata"; src: url("../fonts/Literata-normal.woff2") format("woff2"); font-weight: 300 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Literata"; src: url("../fonts/Literata-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Schibsted Grotesk"; src: url("../fonts/SchibstedGrotesk-normal.woff2") format("woff2"); font-weight: 400 800; font-display: swap; }

:root {
  --obs-ease: cubic-bezier(.16, 1, .3, 1);
  --serif: "Literata", Georgia, serif;
  --sans: "Schibsted Grotesk", system-ui, sans-serif;
  --cab: 72px;
  --gut: clamp(16px, 4vw, 56px);
}
html[data-theme="dark"], html:not([data-theme]) {
  color-scheme: dark;
  --bg: #071019; --bg-2: #0d1c2a; --glow: #14304a;
  --text: #E8E9E3; --text-2: #BAC6CE; --linea: rgba(182, 194, 203, .26);
  --acc: #F2AE5C; --acc-texto: #F2AE5C; --acc-sobre: #1b1204;
  --azul: #608CFF; --azul-texto: #A9C0FF;
  --vidrio: rgba(9, 20, 31, .66); --vidrio-fuerte: rgba(9, 20, 31, .86);
}
html[data-theme="light"] {
  color-scheme: light;
  --bg: #E8E9E3; --bg-2: #F3F3EE; --glow: #FFFFFF;
  --text: #0C1A26; --text-2: #364754; --linea: rgba(12, 26, 38, .28);
  --acc: #F2AE5C; --acc-texto: #7A4300; --acc-sobre: #1b1204;
  --azul: #2F57C8; --azul-texto: #2447AE;
  --vidrio: rgba(243, 243, 238, .7); --vidrio-fuerte: rgba(243, 243, 238, .9);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: auto; -webkit-text-size-adjust: 100%; }
body.obs { margin: 0; background: var(--bg); color: var(--text); font: 400 1.0625rem/1.55 var(--sans); overflow-x: hidden; }
.oculto-visual { position: absolute !important; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; }
.saltar:focus { position: fixed !important; left: 12px; top: 12px; width: auto; height: auto; margin: 0; clip: auto; z-index: 100; padding: 12px 16px; background: var(--acc); color: var(--acc-sobre); border-radius: 12px; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3, p { margin: 0; }

/* ---------- Cabecera ---------- */
.obs-cab { position: fixed; z-index: 30; inset: 0 0 auto 0; height: var(--cab); padding: 0 var(--gut); display: flex; align-items: center; justify-content: space-between; gap: 16px; pointer-events: none; }
.obs-cab > * { pointer-events: auto; }
.obs-cab::before { content: ""; position: absolute; inset: 0 0 -24px 0; z-index: -1; pointer-events: none; background: linear-gradient(180deg, color-mix(in srgb, var(--bg) 88%, transparent), transparent); }
.obs-marca { font: 500 1.5rem/1 var(--serif); letter-spacing: -.01em; text-decoration: none; padding: 10px 4px; }
.obs-nav { display: none; gap: 6px; }
.obs-nav a { text-decoration: none; padding: 12px 16px; border-radius: 22px; color: var(--text-2); transition: color .2s, background .2s; }
.obs-nav a:hover { color: var(--text); background: var(--vidrio); }
.obs-cab-acciones { display: flex; gap: 8px; align-items: center; }
.obs-boton { min-width: 44px; height: 44px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--linea); border-radius: 22px; background: var(--vidrio); color: var(--text); font: 500 .9rem var(--sans); text-decoration: none; cursor: pointer; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: border-color .18s, background .18s, transform .18s var(--obs-ease); }
.obs-boton:hover { border-color: var(--acc); }
.obs-boton:active { transform: scale(.97); }
.obs-etq-largo { display: none; }
.obs-menu { position: relative; }
.obs-menu summary { list-style: none; min-width: 44px; height: 44px; padding: 0 16px; display: inline-flex; align-items: center; border: 1px solid var(--linea); border-radius: 22px; background: var(--vidrio); cursor: pointer; font-weight: 500; font-size: .9rem; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.obs-menu summary::-webkit-details-marker { display: none; }
.obs-menu nav { position: absolute; right: 0; top: 52px; min-width: 200px; display: grid; padding: 8px; border: 1px solid var(--linea); border-radius: 18px; background: var(--vidrio-fuerte); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.obs-menu nav a { text-decoration: none; padding: 13px 14px; border-radius: 12px; }
.obs-menu nav a:hover { background: var(--bg-2); }
@media (min-width: 900px) {
  .obs-nav { display: flex; }
  .obs-menu { display: none; }
  .obs-etq-largo { display: inline; }
  .obs-boton-buscar .obs-etq-largo { display: inline; }
}

/* ---------- Escena fija ---------- */
.obs-escena { position: fixed; inset: 0; z-index: 0; overflow: hidden;
  background: radial-gradient(1100px 760px at 66% 38%, var(--glow) 0%, var(--bg-2) 46%, var(--bg) 100%); }
.obs-escena::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, color-mix(in srgb, var(--bg) 70%, transparent), transparent 18%, transparent 78%, color-mix(in srgb, var(--bg) 55%, transparent)); }
.obs-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: pan-y; pointer-events: none; opacity: 0; transition: opacity .9s var(--obs-ease); }
.obs-escena[data-estado="listo"] .obs-canvas { opacity: 1; }
.obs-escena[data-interactiva="si"] .obs-canvas { pointer-events: auto; cursor: grab; }
.obs-escena[data-arrastrando="si"] .obs-canvas { cursor: grabbing; }
.obs-escena[data-sobre-hito="si"] .obs-canvas { cursor: pointer; }
.obs-alt { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--text); transition: opacity .9s var(--obs-ease); }
.obs-escena[data-estado="listo"] .obs-alt { opacity: 0; pointer-events: none; }
.obs-alt .alt-pin line { stroke: var(--acc); stroke-width: 1.6; }
.obs-alt .alt-pin circle { fill: var(--acc); }
.obs-alt .alt-pin .alt-zona { fill: transparent; }
.obs-alt .alt-pin:focus-visible circle, .obs-alt .alt-pin:hover circle { fill: var(--text); }
.obs-alt .alt-capa, .obs-alt .alt-pin { transition: opacity .5s var(--obs-ease); }
.obs-alt.hay-sel .alt-capa:not(.sel), .obs-alt.hay-sel .alt-pin:not(.sel) { opacity: .28; }
.obs-alt .alt-capa.sel { opacity: 1; }
.obs-etiquetas { position: absolute; inset: 0; pointer-events: none; }
.obs-etq { position: absolute; left: 0; top: 0; font: 500 .8rem/1.2 var(--sans); color: var(--text); white-space: nowrap; padding: 4px 10px; border-radius: 12px; background: var(--vidrio); border: 1px solid var(--linea); opacity: 0; will-change: transform, opacity; }
.obs-pista { position: absolute; left: 0; top: 0; max-width: 260px; padding: 10px 14px; border-radius: 14px; background: var(--vidrio-fuerte); border: 1px solid var(--linea); backdrop-filter: blur(12px); font-size: .875rem; line-height: 1.35; pointer-events: none; will-change: transform; }
.obs-pista strong { display: block; font: 500 .8rem var(--sans); color: var(--acc-texto); margin-bottom: 2px; }

/* ---------- Estructura de secciones ---------- */
.obs-main { position: relative; z-index: 2; outline: none; pointer-events: none; }
.obs-seccion > * { pointer-events: auto; }
.obs-seccion > .obs-hero-texto { pointer-events: none; }
.obs-seccion { position: relative; min-height: 100svh; padding: calc(var(--cab) + 4vh) var(--gut) 12vh; }
.obs-vidrio, .obs-cab-seccion, .obs-bloque, .obs-razones li, .obs-huellas, .obs-hilos { --x: 0; }
.obs-cab-seccion h2 { font: 300 clamp(2.1rem, 5.2vw, 4.4rem)/1 var(--serif); letter-spacing: -.03em; max-width: 11em; text-wrap: balance; }
.obs-cab-ancha h2 { max-width: 14em; }
.obs-cab-seccion h2, .obs-cab-seccion p { text-shadow: 0 0 26px var(--bg), 0 0 10px var(--bg); }
.obs-cab-seccion p { margin-top: 18px; color: var(--text-2); max-width: 38ch; font-size: 1.125rem; }
.obs-nota-escena { margin-top: 28px; max-width: 46ch; font-size: .875rem; color: var(--text-2); }

/* ---------- Hero ---------- */
.obs-hero { display: flex; flex-direction: column; justify-content: flex-end; gap: 18px; padding-bottom: max(5vh, 24px); pointer-events: none; min-width: 0; }
.obs-seccion { max-width: 100vw; }
.obs-hero a, .obs-hero button, .obs-hero input, .obs-hero form, .obs-hero .obs-tarjeta, .obs-mando { pointer-events: auto; }
.obs-hero-texto { pointer-events: none; max-width: 40rem; transition: opacity .5s var(--obs-ease), transform .7s var(--obs-ease); }
.obs-hero h1 { font: 300 clamp(2.9rem, 7.4vw, 6.9rem)/.94 var(--serif); letter-spacing: -.035em; text-wrap: balance; text-shadow: 0 0 36px var(--bg), 0 0 12px var(--bg); }
.obs-entrada { margin-top: 22px; max-width: 30rem; font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: var(--text-2); text-shadow: 0 1px 14px var(--bg); }
.obs-acciones { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; pointer-events: auto; }
.obs-cta { height: 52px; padding: 0 28px; display: inline-flex; align-items: center; border: 0; border-radius: 26px; background: var(--acc); color: var(--acc-sobre); font: 600 1rem var(--sans); text-decoration: none; cursor: pointer; transition: transform .22s var(--obs-ease), box-shadow .22s; box-shadow: 0 0 0 0 transparent; }
.obs-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px var(--acc); }
.obs-cta:active { transform: scale(.98); }
.obs-boton-sec { height: 48px; padding: 0 22px; border-radius: 24px; border: 1px solid var(--linea); background: var(--vidrio); color: var(--text); font: 500 .95rem var(--sans); cursor: pointer; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: border-color .18s; }
.obs-boton-sec:hover { border-color: var(--acc); }
.obs-buscador { display: flex; align-items: center; gap: 8px; }
.obs-buscador input { height: 48px; width: min(15rem, 46vw); padding: 0 18px; border-radius: 24px; border: 1px solid var(--linea); background: var(--vidrio); color: var(--text); font: 400 .95rem var(--sans); backdrop-filter: blur(12px); }
.obs-buscador input::placeholder { color: var(--text-2); }
.obs-buscador input:focus-visible { border-color: var(--acc); outline-offset: 2px; }

/* Mando: épocas, hitos, herramientas */
.obs-mando { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; align-content: end; min-width: 0; }
.obs-epocas { display: flex; gap: 8px; overflow-x: auto; padding: 4px 2px 6px; margin: 0 -2px; scrollbar-width: none; }
.obs-epocas::-webkit-scrollbar { display: none; }
.obs-epoca { flex: 0 0 auto; min-height: 52px; padding: 6px 16px; display: grid; text-align: left; align-content: center; border: 1px solid var(--linea); border-radius: 18px; background: var(--vidrio); color: var(--text); font: inherit; cursor: pointer; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: border-color .18s, background .18s, transform .22s var(--obs-ease); }
.obs-epoca:hover { border-color: var(--acc); }
.obs-epoca[aria-checked="true"] { border-color: var(--acc); background: color-mix(in srgb, var(--acc) 20%, var(--vidrio-fuerte)); transform: translateX(0); }
.obs-epoca-nombre { font: 500 .95rem/1.2 var(--sans); }
.obs-epoca-n { font-size: .78rem; color: var(--text-2); }
.obs-epoca[aria-checked="true"] .obs-epoca-n { color: var(--text); }
.obs-hitos { list-style: none; margin: 0; padding: 2px; display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.obs-hitos[hidden] { display: none; }
.obs-hito { min-height: 44px; padding: 6px 14px; display: grid; text-align: left; border: 1px solid var(--linea); border-radius: 14px; background: var(--vidrio); color: var(--text); font: 400 .82rem/1.25 var(--sans); cursor: pointer; backdrop-filter: blur(12px); white-space: nowrap; transition: border-color .18s; }
.obs-hito:hover, .obs-hito[aria-current="true"] { border-color: var(--acc); }
.obs-hito-fecha { font: 600 .78rem var(--sans); color: var(--acc-texto); }
.obs-herramientas { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 6px 6px 6px 14px; border-radius: 22px; background: var(--vidrio); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.obs-ayuda { font-size: .8rem; line-height: 1.3; color: var(--text-2); }
.obs-herramientas .obs-boton-sec { height: 44px; }

/* Tarjeta de historia: nace del marcador seleccionado */
.obs-tarjeta { position: fixed; left: var(--gut); right: var(--gut); bottom: max(3vh, 12px); z-index: 25; padding: 20px 22px 22px; border: 1px solid var(--linea); border-radius: 22px; background: var(--vidrio-fuerte); backdrop-filter: blur(22px) saturate(1.25); -webkit-backdrop-filter: blur(22px) saturate(1.25); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .6); transform-origin: var(--ox, 50%) var(--oy, 100%); }
.obs-tarjeta[hidden] { display: none; }
.obs-tarjeta-fecha { font: 600 .85rem var(--sans); color: var(--acc-texto); }
.obs-tarjeta-titulo { margin: 6px 0 10px; font: 400 clamp(1.45rem, 2.6vw, 2.1rem)/1.1 var(--serif); letter-spacing: -.015em; }
.obs-tarjeta-resumen { color: var(--text-2); font-size: 1rem; }
.obs-tarjeta-lugares { margin-top: 10px; font-size: .84rem; color: var(--text-2); }
.obs-tarjeta-lugares:empty { display: none; }
.obs-tarjeta-enlace { margin-top: 16px; display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 22px; border-radius: 22px; background: var(--acc); color: var(--acc-sobre); font: 600 .95rem var(--sans); text-decoration: none; }
.obs-tarjeta-cerrar { position: absolute; right: 12px; top: 12px; min-width: 44px; height: 44px; border: 0; background: transparent; color: var(--text-2); font: 500 .85rem var(--sans); cursor: pointer; border-radius: 22px; }
.obs-tarjeta-cerrar:hover { color: var(--text); }
.obs-hero[data-sel="si"] .obs-hero-texto { opacity: 0; transform: translateY(24px); pointer-events: none; visibility: hidden; transition: opacity .35s var(--obs-ease), transform .5s var(--obs-ease), visibility 0s .5s; }
.obs-hero[data-sel="si"] .obs-acciones { visibility: hidden; }

@media (min-width: 900px) {
  .obs-hero { display: grid; grid-template-columns: minmax(0, 1fr) 19rem; align-items: end; column-gap: 40px; padding-bottom: 7vh; }
  .obs-hero-texto { grid-column: 1; }
  .obs-mando { grid-column: 2; grid-row: 1; align-self: end; max-height: calc(100svh - var(--cab) - 9vh); }
  .obs-epocas { flex-direction: column-reverse; overflow: visible; }
  .obs-epoca { min-height: 56px; }
  .obs-hitos { flex-direction: column; overflow: visible; }
  .obs-hito { white-space: normal; }
  .obs-tarjeta { right: auto; left: var(--gut); width: min(27rem, 38vw); bottom: 7vh; }
  .obs-escena[data-estado] ~ .obs-main .obs-tarjeta { }
}
@media (max-height: 620px) and (min-width: 900px) { .obs-epocas { gap: 5px; } .obs-epoca { min-height: 46px; } }
@media (max-width: 599px) { .obs-boton-buscar { display: none; } }
@media (max-width: 899px) {
  .obs-hero .obs-buscador { display: none; }
  .obs-hero { gap: 12px; }
  .obs-entrada { margin-top: 14px; }
  .obs-acciones { margin-top: 18px; }
  .obs-ayuda { font-size: .78rem; }
}

/* ---------- 2 · Descubrir ---------- */
.obs-descubrir { display: flex; flex-direction: column; justify-content: center; gap: 36px; }
.obs-huellas { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; max-width: 70rem; align-items: end; }
.obs-huella { width: 100%; min-height: 150px; padding: 20px; display: grid; gap: 4px; align-content: end; text-align: left; border: 1px solid var(--linea); border-radius: 24px; background: var(--vidrio); color: var(--text); font: inherit; cursor: pointer; position: relative; overflow: hidden; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); transition: border-color .2s, transform .45s var(--obs-ease); }
.obs-huella:hover, .obs-huella[aria-pressed="true"] { border-color: var(--acc); transform: translateY(-4px); }
.obs-huella-obj { position: absolute; inset: 0 0 auto 0; height: 55%; opacity: .9; }
.obs-huella-t { position: relative; font: 400 1.5rem/1.1 var(--serif); letter-spacing: -.015em; }
.obs-huella-d { position: relative; color: var(--text-2); font-size: .95rem; }
.obs-huella-f { position: relative; margin-top: 8px; font: 600 .78rem var(--sans); color: var(--acc-texto); }
.obs-huella-ceniza .obs-huella-obj { background: radial-gradient(circle at 30% 70%, color-mix(in srgb, var(--text) 38%, transparent) 0 2px, transparent 3px) 0 0 / 14px 14px, radial-gradient(circle at 70% 30%, color-mix(in srgb, var(--text) 26%, transparent) 0 1.5px, transparent 2.5px) 5px 7px / 11px 11px, linear-gradient(180deg, transparent, color-mix(in srgb, var(--text) 14%, transparent)); mask-image: linear-gradient(180deg, transparent, #000 70%); -webkit-mask-image: linear-gradient(180deg, transparent, #000 70%); }
.obs-huella-linea .obs-huella-obj { background: linear-gradient(90deg, transparent 0 54%, var(--acc) 54% calc(54% + 2px), transparent calc(54% + 2px)), repeating-linear-gradient(90deg, var(--linea) 0 1px, transparent 1px 28px), repeating-linear-gradient(0deg, var(--linea) 0 1px, transparent 1px 28px); }
.obs-huella-red .obs-huella-obj { background: radial-gradient(circle at 18% 70%, var(--acc) 0 4px, transparent 5px), radial-gradient(circle at 42% 30%, var(--acc) 0 4px, transparent 5px), radial-gradient(circle at 66% 62%, var(--acc) 0 4px, transparent 5px), radial-gradient(circle at 88% 26%, var(--acc) 0 4px, transparent 5px), linear-gradient(160deg, transparent 22%, color-mix(in srgb, var(--azul) 70%, transparent) 22.4% 23.4%, transparent 24%) , repeating-linear-gradient(90deg, var(--linea) 0 1px, transparent 1px 28px); }
@media (min-width: 900px) {
  .obs-descubrir { justify-content: flex-end; }
  .obs-descubrir .obs-cab-seccion { margin-left: auto; margin-right: 0; width: min(26rem, 100%); }
  .obs-huellas { grid-template-columns: 1.1fr .9fr 1.25fr; }
  .obs-huellas li:nth-child(2) { transform: translateY(-34px); }
  .obs-huellas li:nth-child(2) .obs-huella:hover { transform: translateY(-4px); }
  .obs-huella { min-height: 230px; }
}

/* ---------- 3 · Avanzar ---------- */
.obs-avanzar { display: flex; flex-direction: column; justify-content: center; gap: 36px; }
.obs-par { display: grid; gap: 22px; }
.obs-bloque { padding: 22px 22px 14px; border: 1px solid var(--linea); border-radius: 24px; background: var(--vidrio); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.obs-bloque h3 { font: 600 .85rem var(--sans); color: var(--acc-texto); margin-bottom: 6px; }
.obs-filas { list-style: none; margin: 0; padding: 0; }
.obs-fila a { display: grid; grid-template-columns: 5.5rem 1fr; gap: 14px; align-items: baseline; padding: 14px 0; border-top: 1px solid var(--linea); text-decoration: none; position: relative; transition: padding .35s var(--obs-ease); }
.obs-fila:first-child a { border-top: 0; }
.obs-fila-anio { font: 300 1.5rem/1 var(--serif); letter-spacing: -.02em; }
.obs-fila-titulo { font-size: .98rem; line-height: 1.3; }
.obs-fila a:hover, .obs-fila a[data-activo="si"] { padding-left: 8px; }
.obs-fila a:hover .obs-fila-titulo, .obs-fila a[data-activo="si"] .obs-fila-titulo { color: var(--acc-texto); }
@media (min-width: 900px) {
  .obs-par { grid-template-columns: minmax(0, 24rem) 1fr minmax(0, 26rem); }
  .obs-remoto { grid-column: 1; align-self: start; }
  .obs-reciente { grid-column: 3; align-self: end; }
}

/* ---------- 4 · Conectar ---------- */
.obs-conectar { display: flex; flex-direction: column; justify-content: flex-end; gap: 22px; }
.obs-hilos { display: grid; gap: 10px; max-width: 40rem; }
.obs-hilo { min-height: 64px; padding: 10px 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; text-align: left; border: 1px solid var(--linea); border-radius: 20px; background: var(--vidrio); color: var(--text); font: 400 .98rem/1.25 var(--sans); cursor: pointer; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transition: border-color .2s, background .2s; }
.obs-hilo[aria-pressed="true"] { border-color: var(--azul-texto); background: color-mix(in srgb, var(--azul) 18%, var(--vidrio-fuerte)); }
.obs-hilo:hover { border-color: var(--azul-texto); }
.obs-hilo-tipo { flex-basis: 100%; font: 600 .78rem var(--sans); color: var(--azul-texto); }
.obs-nota-hilo { max-width: 40rem; padding: 14px 18px; border-radius: 16px; background: var(--vidrio); border: 1px solid var(--linea); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); color: var(--text-2); font-size: .95rem; }
.obs-enlaces-hilo { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.obs-enlace { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-weight: 600; text-decoration: underline; text-decoration-color: var(--acc); text-underline-offset: 5px; text-decoration-thickness: 2px; }
.obs-enlace:hover { color: var(--acc-texto); }
.obs-enlace::after { content: "↗"; }
@media (min-width: 900px) { .obs-conectar { padding-left: calc(var(--gut) + 2vw); } }

/* ---------- 5 · Importa ---------- */
.obs-importa { padding-bottom: 4vh; }
.obs-importa .obs-cab-seccion { position: sticky; top: calc(var(--cab) + 12px); z-index: 2; }
.obs-razones { list-style: none; margin: 8vh 0 0; padding: 0; display: grid; gap: 28vh; max-width: 30rem; }
.obs-razones li { padding: 22px 24px 24px; border: 1px solid var(--linea); border-radius: 22px; background: var(--vidrio); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); transition: border-color .3s, transform .6s var(--obs-ease); }
.obs-razones li[data-activo="si"] { border-color: var(--acc); }
.obs-razones h3 { font: 400 1.9rem/1.05 var(--serif); letter-spacing: -.02em; margin-bottom: 10px; }
.obs-razones p { color: var(--text-2); margin-bottom: 12px; }
.obs-razones li:last-child { margin-bottom: 18vh; }
@media (min-width: 900px) { .obs-razones { margin-left: auto; margin-right: 4vw; } .obs-importa .obs-cab-seccion { max-width: 18rem; } }

/* ---------- 6 · Elegir ---------- */
.obs-elegir { display: flex; flex-direction: column; justify-content: center; gap: 28px; background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--bg) 78%, transparent) 40%); }
.obs-puertas { display: grid; gap: 12px; max-width: 72rem; }
.obs-puerta { display: grid; gap: 6px; padding: 22px 24px; border: 1px solid var(--linea); border-radius: 24px; background: var(--vidrio); text-decoration: none; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); position: relative; transition: border-color .2s, transform .45s var(--obs-ease); }
.obs-puerta:hover { border-color: var(--acc); transform: translateY(-4px); }
.obs-puerta > span[aria-hidden] { position: absolute; right: 22px; top: 18px; font-size: 1.3rem; color: var(--acc-texto); }
.obs-puerta-t { font: 300 2.4rem/1 var(--serif); letter-spacing: -.025em; }
.obs-puerta-d { color: var(--text-2); max-width: 26ch; }
.obs-buscador-grande { display: grid; gap: 8px; max-width: 40rem; }
.obs-buscador-grande label { font: 500 .9rem var(--sans); color: var(--text-2); }
.obs-buscador-grande > div { display: flex; gap: 8px; }
.obs-buscador-grande input { flex: 1; width: auto; min-width: 0; }
.obs-juegos { color: var(--text-2); font-size: .95rem; }
.obs-juegos a { font-weight: 600; }
@media (min-width: 900px) { .obs-puertas { grid-template-columns: repeat(3, 1fr); } .obs-puerta:nth-child(2) { margin-top: 28px; } .obs-puerta:nth-child(3) { margin-top: 56px; } }

/* ---------- Pie: fuentes aquí y solo aquí ---------- */
.obs-pie { position: relative; z-index: 3; background: var(--bg); border-top: 1px solid var(--linea); padding: 56px var(--gut) 40px; }
.obs-pie-in { max-width: 72rem; display: grid; gap: 32px; }
.obs-pie h2 { font: 400 1.9rem/1.1 var(--serif); letter-spacing: -.02em; margin-bottom: 8px; }
.obs-pie-fuentes p { color: var(--text-2); margin-bottom: 18px; max-width: 40ch; }
.obs-pie-enlaces { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 22px; }
.obs-pie-enlaces a { display: inline-flex; min-height: 44px; align-items: center; color: var(--text-2); }
.obs-pie-enlaces a:hover { color: var(--text); }
.obs-pie-nota { font-size: .85rem; color: var(--text-2); max-width: 70ch; }
@media (min-width: 900px) { .obs-pie-in { grid-template-columns: 1fr 1fr; } .obs-pie-nota { grid-column: 1 / -1; } }

/* ---------- Sin JavaScript o sin WebGL: composición alternativa ---------- */
html:not(.js) .obs-hero .obs-epocas, html:not(.js) .obs-hero .obs-herramientas { display: none; }
.obs-sin-webgl .obs-ayuda { display: none; }

/* La escena debe asomar entre bloques en pantallas estrechas */
@media (max-width: 899px) { .obs-par { gap: 36svh; } .obs-descubrir { justify-content: flex-end; } .obs-huellas { gap: 10px; } .obs-huella { min-height: 128px; } }

/* ---------- Reducción de movimiento / efectos desactivados ---------- */
html[data-movimiento="no"] .obs-hero-texto, html[data-movimiento="no"] .obs-huella, html[data-movimiento="no"] .obs-puerta,
html[data-movimiento="no"] .obs-razones li, html[data-movimiento="no"] .obs-fila a, html[data-movimiento="no"] .obs-cta { transition: none; }
html[data-movimiento="no"] .obs-huella:hover, html[data-movimiento="no"] .obs-puerta:hover, html[data-movimiento="no"] .obs-cta:hover { transform: none; }
html[data-movimiento="no"] .obs-canvas, html[data-movimiento="no"] .obs-alt { transition: none; }
@media (prefers-reduced-motion: reduce) { .obs-canvas, .obs-alt { transition: none; } }

/* Superficie compartida con la ficha de la historia (la gestiona motion.js) */
[data-event-surface] { position: absolute; inset: 0; z-index: -1; border-radius: inherit; background: transparent; pointer-events: none; }
[data-event-surface][style*="acontecimiento"] { background: color-mix(in srgb, var(--acc) 16%, var(--vidrio-fuerte)); }
.obs-fila a, .obs-razones .obs-enlace, .obs-tarjeta-enlace, .obs-enlaces-hilo .obs-enlace { position: relative; isolation: isolate; }
.obs-tarjeta-enlace [data-event-surface][style*="acontecimiento"] { background: var(--acc); }
.regreso-seleccionado { outline: 2px solid var(--acc); outline-offset: 4px; }
/* La tarjeta solo se muestra donde la escena sigue la selección */
.obs-tarjeta[data-lejos="si"] { visibility: hidden; opacity: 0; pointer-events: none; }
@media (max-width: 899px) {
  .obs-hero[data-sel="si"] .obs-mando { visibility: hidden; }
  .obs-tarjeta { max-height: 52svh; overflow: auto; }
}