/* ==========================================================================
   REDISEÑO · movimiento y atmósfera (se carga después de app.css)
   ========================================================================== */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: 220ms ease both vt-sale; }
::view-transition-new(root) { animation: 380ms cubic-bezier(.2, .8, .2, 1) both vt-entra; }
@keyframes vt-sale { to { opacity: 0; } }
@keyframes vt-entra { from { opacity: 0; transform: translateY(10px); } }

/* titular palabra a palabra */
.listo-pal .pal { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: .12em; margin-bottom: -.12em; }
.listo-pal .pal > span { display: inline-block; transform: translateY(105%); animation: pal-sube .9s cubic-bezier(.2, .8, .2, 1) forwards; animation-delay: calc(.12s + var(--i) * 70ms); }
@keyframes pal-sube { to { transform: none; } }

/* revelado al hacer scroll */
.js-mov [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .9s cubic-bezier(.2, .8, .2, 1), transform .9s cubic-bezier(.2, .8, .2, 1); }
.js-mov [data-reveal="izq"] { transform: translateX(-34px); }
.js-mov [data-reveal="der"] { transform: translateX(34px); }
.js-mov [data-reveal="escala"] { transform: scale(.94); }
.js-mov [data-reveal].visto { opacity: 1; transform: none; }
.js-mov [data-reveal="grupo"] { opacity: 1; transform: none; }
.js-mov [data-reveal="grupo"] > * { opacity: 0; transform: translateY(22px); transition: opacity .8s cubic-bezier(.2, .8, .2, 1) var(--d, 0ms), transform .8s cubic-bezier(.2, .8, .2, 1) var(--d, 0ms); }
.js-mov [data-reveal="grupo"].visto > * { opacity: 1; transform: none; }

/* brillo que sigue al cursor */
.card, .mod, .prog-item, .glass { position: relative; }
.card::after, .mod::after, .prog-item::after, .glass::after, .bento > *::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .35s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--brand) 13%, transparent), transparent 62%);
}
.card:hover::after, .mod:hover::after, .prog-item:hover::after, .glass:hover::after, .bento > *:hover::after { opacity: 1; }
.card { transition: border-color .3s, box-shadow .3s; }
.btn { position: relative; overflow: hidden; }
.btn .onda { position: absolute; width: 10px; height: 10px; margin: -5px 0 0 -5px; border-radius: 50%; background: rgba(255, 255, 255, .45); transform: scale(0); animation: onda .65s ease-out forwards; pointer-events: none; }
.btn-ghost .onda, .btn-quiet .onda { background: color-mix(in srgb, var(--brand) 25%, transparent); }
@keyframes onda { to { transform: scale(46); opacity: 0; } }
.tilt { transition: transform .25s ease-out; will-change: transform; }

/* superficie de cristal */
.glass { background: color-mix(in srgb, var(--surface) 72%, transparent); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3); border: 1px solid color-mix(in srgb, var(--line) 80%, transparent); border-radius: 20px; box-shadow: var(--shadow); }

/* aurora: luces que se mueven despacio */
.aurora { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.aurora i { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; animation: aurora 20s ease-in-out infinite alternate; }
.aurora i:nth-child(1) { width: 46%; aspect-ratio: 1; left: -8%; top: -20%; background: radial-gradient(circle, #6d4aff, transparent 65%); }
.aurora i:nth-child(2) { width: 38%; aspect-ratio: 1; right: -6%; top: 5%; background: radial-gradient(circle, #e8a400, transparent 65%); animation-duration: 26s; animation-delay: -8s; opacity: .38; }
.aurora i:nth-child(3) { width: 34%; aspect-ratio: 1; left: 32%; bottom: -26%; background: radial-gradient(circle, #3f5aa8, transparent 65%); animation-duration: 30s; animation-delay: -14s; opacity: .4; }
@keyframes aurora { to { transform: translate3d(7%, 6%, 0) scale(1.18); } }

/* ---------- cabecera pública sobre la portada ---------- */
.pub-top { transition: background .35s, border-color .35s, box-shadow .35s; }
body.con-hero .pub-top { position: fixed; left: 0; right: 0; background: transparent; border-color: transparent; backdrop-filter: none; }
body.con-hero .pub-top:not(.scrolled) .marca, body.con-hero .pub-top:not(.scrolled) .marca small, body.con-hero .pub-top:not(.scrolled) .pub-nav a:not(.btn) { color: #fff; }
body.con-hero .pub-top:not(.scrolled) .marca small { opacity: .75; }
body.con-hero .pub-top:not(.scrolled) .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .45); }
body.con-hero .pub-top:not(.scrolled) .btn-ghost:hover { background: rgba(255, 255, 255, .14); }
body.con-hero .pub-top:not(.scrolled) .btn-quiet { color: #fff; }
body.con-hero .pub-top.scrolled { background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(14px) saturate(1.4); border-color: var(--line); box-shadow: 0 8px 30px -22px rgba(0, 0, 0, .5); }
body.con-hero .pub-main { min-height: 0; }

/* ---------- portada ---------- */
.h-hero { position: relative; min-height: min(100svh, 920px); display: grid; align-items: center; overflow: hidden; background: #14112a; color: #fff; isolation: isolate; }
.h-fondo { position: absolute; inset: 0; z-index: -2; }
.h-fondo video, .h-fondo img { position: absolute; inset: -4% 0; width: 100%; height: 108%; object-fit: cover; transform: translateY(var(--py, 0)) scale(1.04); }
.h-fondo video { opacity: 0; transition: opacity 1.6s ease; }
.h-fondo video.lista { opacity: 1; }
.h-vela { position: absolute; inset: 0; z-index: -1; background:
  linear-gradient(90deg, rgba(5, 26, 10, .88) 0%, rgba(5, 26, 10, .62) 46%, rgba(5, 26, 10, .18) 100%),
  linear-gradient(0deg, rgba(5, 26, 10, .92), transparent 38%); }
.h-hero .aurora { z-index: -1; mix-blend-mode: screen; opacity: .8; }
.h-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr); gap: clamp(1.5rem, 4vw, 4rem); align-items: center; padding-top: 7rem; padding-bottom: 6rem; }
.h-hero .eyebrow { color: #d9ceff; font-size: 1.1rem; }
.h-hero h1 { color: #fff; font-size: clamp(2.5rem, 1.3rem + 5.2vw, 5.2rem); line-height: 1; letter-spacing: -.025em; margin-bottom: 1.3rem; max-width: 15ch; }
.h-hero h1 em { color: #b9a6ff; font-style: italic; }
.h-hero .lead { color: rgba(255, 255, 255, .84); font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); max-width: 52ch; margin-bottom: 2rem; }
.h-hero .btn { --b: #fff; background: #fff; color: #2a1f66; border-color: #fff; }
.h-hero .btn:hover { background: #f3efff; color: #2a1f66; }
.h-hero .btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .5); }
.h-hero .btn-ghost:hover { background: rgba(255, 255, 255, .14); border-color: #fff; color: #fff; }
.h-micro { color: rgba(255, 255, 255, .7); font-size: .88rem; margin: 1.2rem 0 0; }
.h-micro a { color: #fff; }
.h-tarjeta { background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .22); border-radius: 22px; padding: 1.5rem; backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .6); color: #fff; }
.h-tarjeta .hero-q { color: #fff; border-color: #b9a6ff; font-size: 1.4rem; }
.h-tarjeta h3 { color: rgba(255, 255, 255, .7); font: 600 .8rem/1 var(--sans); margin: 1.2rem 0 .8rem; letter-spacing: .02em; }
.h-tarjeta .hero-pasos li { background: rgba(255, 255, 255, .1); color: #fff; border: 1px solid rgba(255, 255, 255, .1); transition: transform .3s, background .3s; }
.h-tarjeta .hero-pasos li:hover { transform: translateX(4px); background: rgba(255, 255, 255, .17); }
.h-tarjeta .hero-pasos b { background: #b9a6ff; color: #14112a; }
.h-baja { position: absolute; left: 50%; bottom: 1.6rem; width: 26px; height: 42px; border: 1.5px solid rgba(255, 255, 255, .55); border-radius: 14px; transform: translateX(-50%); }
.h-baja::after { content: ""; position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: #fff; animation: baja 1.8s ease-in-out infinite; }
@keyframes baja { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }
@media (max-width: 900px) { .h-grid { grid-template-columns: 1fr; padding-top: 6.5rem; padding-bottom: 5rem; } .h-vela { background: linear-gradient(0deg, rgba(5, 26, 10, .9), rgba(5, 26, 10, .55)); } .h-baja { display: none; } }

/* cinta de palabras */
.cinta { overflow: hidden; border-block: 1px solid var(--line); background: var(--surface); padding: 1.1rem 0; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.cinta-pista { display: flex; width: max-content; gap: 3rem; animation: cinta 38s linear infinite; }
.cinta:hover .cinta-pista { animation-play-state: paused; }
.cinta span { font: italic 500 clamp(1.4rem, 1rem + 1.6vw, 2.2rem)/1 var(--serif); color: var(--ink-2); white-space: nowrap; display: inline-flex; align-items: center; gap: 3rem; }
.cinta span::after { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--brand); opacity: .55; }
@keyframes cinta { to { transform: translateX(-50%); } }

/* cifras */
.cifras { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin: clamp(2.5rem, 6vw, 4rem) 0; }
.cifra { padding: 1.4rem 1.2rem; border-left: 1px solid var(--line); }
.cifra:first-child { border-left: 0; }
.cifra b { display: block; font: 600 clamp(2.4rem, 1.6rem + 3vw, 4rem)/1 var(--serif); letter-spacing: -.03em; color: var(--brand); }
.cifra span { color: var(--muted); font-size: .92rem; }
@media (max-width: 760px) { .cifras { grid-template-columns: repeat(2, 1fr); } .cifra:nth-child(3) { border-left: 0; } }

/* secciones */
.sec { padding: clamp(3rem, 8vw, 6rem) 0; position: relative; }
.sec-cab { max-width: 60ch; margin-bottom: clamp(1.8rem, 4vw, 3rem); }
.sec-cab h2 { font-size: clamp(1.9rem, 1.3rem + 2.4vw, 3.2rem); line-height: 1.05; letter-spacing: -.02em; }
.sec-cab p { color: var(--ink-2); font-size: 1.1rem; margin: 0; }

/* bento de competencias */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1rem; }
.bento > * { position: relative; border-radius: 22px; padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); overflow: hidden; transition: transform .4s cubic-bezier(.2, .8, .2, 1), border-color .3s, box-shadow .4s; }
.bento > *:hover { transform: translateY(-5px); border-color: var(--brand); box-shadow: 0 26px 50px -30px color-mix(in srgb, var(--brand) 55%, transparent); }
.bento > * { grid-column: span 2; }
.bento > *:nth-child(1) { background: linear-gradient(150deg, var(--brand), var(--brand-2)); color: #fff; border-color: transparent; }
.bento > *:nth-child(1) p, .bento > *:nth-child(1) h3 { color: #fff; }
.bento h3 { font-size: 1.4rem; margin: .8rem 0 .4rem; }
.bento p { margin: 0; color: var(--ink-2); font-size: .98rem; }
.bento .ico-b { width: 52px; height: 52px; border-radius: 14px; background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; }
.bento > *:nth-child(1) .ico-b { background: rgba(255, 255, 255, .16); color: #fff; }
.bento .ico-b svg { width: 28px; height: 28px; }
.js-mov .bento .ico-b svg * { stroke-dasharray: 140; stroke-dashoffset: 140; transition: stroke-dashoffset 1.7s cubic-bezier(.2, .8, .2, 1) .25s; }
.js-mov .bento .visto .ico-b svg *, .js-mov .bento.visto .ico-b svg * { stroke-dashoffset: 0; }
@media (max-width: 860px) { .bento > * { grid-column: span 6 !important; } }
@media (min-width: 861px) and (max-width: 1060px) { .bento > * { grid-column: span 3; } }

/* módulos con portada */
.portadas { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.portada { position: relative; display: flex; flex-direction: column; justify-content: flex-end; min-height: 340px; border-radius: 24px; overflow: hidden; color: #fff; text-decoration: none; isolation: isolate; background: #1d1840; transition: transform .5s cubic-bezier(.2, .8, .2, 1), box-shadow .5s; }
.portada:hover { transform: translateY(-6px); box-shadow: 0 40px 70px -35px rgba(6, 38, 12, .8); color: #fff; }
.portada img, .portada .arte { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 1.2s cubic-bezier(.2, .8, .2, 1); }
.portada:hover img, .portada:hover .arte { transform: scale(1.08); }
.portada::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(4, 24, 9, .94) 0%, rgba(4, 24, 9, .5) 48%, rgba(4, 24, 9, .1) 100%); }
.portada .cont { padding: 1.5rem 1.6rem 1.6rem; }
.portada .num { position: absolute; top: 1.1rem; left: 1.4rem; font: italic 500 1.05rem/1 var(--serif); color: #e3d9ff; background: rgba(255, 255, 255, .12); backdrop-filter: blur(8px); padding: .45rem .85rem; border-radius: 99px; border: 1px solid rgba(255, 255, 255, .22); }
.portada .estado { position: absolute; top: 1.1rem; right: 1.2rem; font-size: .76rem; font-weight: 600; padding: .3rem .75rem; border-radius: 99px; background: rgba(255, 255, 255, .92); color: #2a1f66; }
.portada h3 { color: #fff; font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); margin-bottom: .4rem; }
.portada p { color: rgba(255, 255, 255, .8); margin: 0 0 .9rem; font-size: .96rem; max-width: 46ch; }
.portada .ver { display: inline-flex; gap: .5rem; align-items: center; font-weight: 600; font-size: .92rem; transition: gap .3s; }
.portada:hover .ver { gap: .9rem; }
.portada.pronto { min-height: 190px; filter: saturate(.55) brightness(.8); }
.portada.pronto:hover { transform: none; box-shadow: none; }
.portada.pronto .ver { display: none; }
.portadas.pequenas { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 1.2rem; }
.portadas.pequenas .portada { min-height: 170px; }
.portadas.pequenas .portada h3 { font-size: 1.1rem; margin: 0; }
.portadas.pequenas .portada p { display: none; }
@media (max-width: 900px) { .portadas, .portadas.pequenas { grid-template-columns: 1fr; } .portada { min-height: 280px; } }

/* maqueta de lección */
.maqueta { border-radius: 22px; border: 1px solid var(--line); background: var(--surface); box-shadow: 0 40px 80px -40px rgba(6, 38, 12, .5); overflow: hidden; }
.maqueta-b { display: flex; align-items: center; gap: .4rem; padding: .7rem 1rem; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.maqueta-b i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.maqueta-b span { margin-left: .6rem; font-size: .75rem; color: var(--muted); }
.maqueta-c { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1rem; padding: 1.2rem; }
.maqueta .vid { aspect-ratio: 16/9; border-radius: 12px; background: linear-gradient(150deg, #2a1f66, #120f27); position: relative; overflow: hidden; display: grid; place-items: center; }
.maqueta .vid svg { width: 46px; height: 46px; color: #fff; opacity: .9; z-index: 1; }
.maqueta .vid::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 30% 30%, rgba(179, 234, 92, .35), transparent 55%); animation: pulso-m 6s ease-in-out infinite; }
@keyframes pulso-m { 50% { transform: scale(1.3); opacity: .5; } }
.maqueta .lin { height: 9px; border-radius: 6px; background: var(--surface-3); margin-bottom: .55rem; }
.maqueta .lin.s { width: 70%; } .maqueta .lin.m { width: 88%; } .maqueta .lin.t { height: 14px; width: 54%; background: color-mix(in srgb, var(--brand) 28%, var(--surface-3)); margin-bottom: .9rem; }
.maqueta .opc { display: flex; align-items: center; gap: .5rem; padding: .5rem .7rem; border: 1px solid var(--line-2); border-radius: 9px; margin-bottom: .45rem; font-size: .78rem; color: var(--ink-2); }
.maqueta .opc.ok { animation: acierta 5s ease-in-out infinite; }
@keyframes acierta { 0%, 55% { background: var(--surface); border-color: var(--line-2); } 65%, 100% { background: var(--ok-soft); border-color: var(--ok); } }
.dos-col { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.dos-col ul { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: .9rem; }
.dos-col li { display: grid; grid-template-columns: 38px 1fr; gap: .9rem; align-items: start; }
.dos-col li .ic { width: 38px; height: 38px; border-radius: 11px; background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; }
.dos-col li b { display: block; margin-bottom: .1rem; }
.dos-col li span { color: var(--ink-2); font-size: .95rem; }
@media (max-width: 900px) { .dos-col { grid-template-columns: 1fr; } }

/* preguntas frecuentes */
.faq { display: grid; gap: .7rem; max-width: 820px; }
.faq details { border: 1px solid var(--line); border-radius: 16px; background: var(--surface); overflow: hidden; transition: border-color .3s, box-shadow .3s; }
.faq details[open] { border-color: var(--brand); box-shadow: 0 20px 40px -30px color-mix(in srgb, var(--brand) 60%, transparent); }
.faq summary { cursor: pointer; padding: 1.1rem 1.3rem; font: 600 1.12rem/1.3 var(--serif); list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.6rem/1 var(--sans); color: var(--brand); transition: transform .35s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div { padding: 0 1.3rem 1.2rem; color: var(--ink-2); animation: despliega .45s cubic-bezier(.2, .8, .2, 1); }
@keyframes despliega { from { opacity: 0; transform: translateY(-8px); } }

/* llamada final */
.cta-final { position: relative; border-radius: 30px; overflow: hidden; padding: clamp(2.5rem, 7vw, 5rem) clamp(1.5rem, 5vw, 4rem); text-align: center; color: #fff; background: linear-gradient(150deg, #2a1f66, #14112a); isolation: isolate; }
.cta-final h2 { color: #fff; font-size: clamp(2rem, 1.3rem + 3vw, 3.4rem); max-width: 18ch; margin: 0 auto 1rem; }
.cta-final p { color: rgba(255, 255, 255, .8); max-width: 52ch; margin: 0 auto 1.8rem; font-size: 1.1rem; }
.cta-final .btn { background: #fff; color: #2a1f66; border-color: #fff; }
.cta-final .btn:hover { background: #f3efff; color: #2a1f66; }
.cta-final .btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .5); }
.cta-final .aurora { z-index: -1; }

/* ---------- aula: más vida ---------- */
.continuar { background: linear-gradient(135deg, #6d4aff, #2a1f66 60%, #16355a); background-size: 160% 160%; animation: degrada 14s ease-in-out infinite alternate; }
@keyframes degrada { to { background-position: 100% 100%; } }
.kpi, .mod { transition: transform .35s cubic-bezier(.2, .8, .2, 1), box-shadow .35s, border-color .3s; }
.kpi:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.mod-cover { position: relative; margin: -1.3rem -1.3rem .3rem; height: 132px; border-radius: 12px 12px 0 0; overflow: hidden; background: #1d1840; }
.mod-cover img, .mod-cover .arte { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 1s cubic-bezier(.2, .8, .2, 1); }
a.mod:hover .mod-cover img, a.mod:hover .mod-cover .arte { transform: scale(1.08); }
.mod-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5, 28, 10, .55), transparent 60%); }
.mod.lock .mod-cover { filter: grayscale(.8) brightness(.8); }
.mod.soon .mod-cover { display: none; }
.modulo-cover { position: relative; border-radius: 24px; overflow: hidden; color: #fff; padding: clamp(1.6rem, 4vw, 2.8rem); margin-bottom: 1.6rem; min-height: 230px; display: flex; flex-direction: column; justify-content: flex-end; isolation: isolate; background: #1d1840; }
.modulo-cover img, .modulo-cover .arte { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transform: translateY(var(--py, 0)) scale(1.08); }
.modulo-cover::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(4, 24, 9, .92), rgba(4, 24, 9, .35) 60%, rgba(4, 24, 9, .2)); }
.modulo-cover .eyebrow { color: #d4c6ff; }
.modulo-cover h1 { color: #fff; margin-bottom: .5rem; max-width: 22ch; }
.modulo-cover p { color: rgba(255, 255, 255, .85); max-width: 60ch; margin: 0; font-size: 1.05rem; }
.lec-banner { position: relative; height: 150px; border-radius: 20px; overflow: hidden; margin-bottom: 1.4rem; background: #1d1840; isolation: isolate; }
.lec-banner img, .lec-banner .arte { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; transform: translateY(var(--py, 0)) scale(1.1); }
.lec-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(20,17,42,.55), transparent 70%); }
.hecho-pop { animation: pop .5s cubic-bezier(.2, 1.6, .4, 1); }
@keyframes pop { 0% { transform: scale(.85); } 100% { transform: scale(1); } }
.lec.done .lec-ico { animation: pop .6s cubic-bezier(.2, 1.6, .4, 1); }
.bar > i { background-image: linear-gradient(90deg, var(--brand), color-mix(in srgb, var(--brand) 60%, #b9a6ff)); position: relative; overflow: hidden; }
.bar > i::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .45) 50%, transparent 70%); transform: translateX(-100%); animation: brilla 3.6s ease-in-out infinite; }
@keyframes brilla { 60%, 100% { transform: translateX(100%); } }

@media (prefers-reduced-motion: reduce) {
  .h-fondo video { display: none; }
  .js-mov [data-reveal], .js-mov [data-reveal="grupo"] > * { opacity: 1 !important; transform: none !important; }
  .listo-pal .pal > span { transform: none; animation: none; }
  .aurora i, .cinta-pista, .continuar { animation: none; }
}

/* ---------- marca: sello, logo y docente ---------- */
.marca-sello { width: 38px; height: 38px; border-radius: 10px; background: #fff; display: block; box-shadow: 0 2px 10px -3px rgba(0, 0, 0, .35), 0 0 0 1px rgba(120, 191, 0, .25); object-fit: cover; }
.marca { gap: .7rem; }
.logo-tema { display: inline-block; line-height: 0; }
.logo-tema img { width: 100%; height: auto; }
.logo-tema .l-oscuro { display: none; }
:root[data-tema="oscuro"] .logo-tema .l-claro { display: none; }
:root[data-tema="oscuro"] .logo-tema .l-oscuro { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) .logo-tema .l-claro { display: none; }
  :root:not([data-tema="claro"]) .logo-tema .l-oscuro { display: block; }
}
.docente-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.docente-foto { position: relative; max-width: 420px; justify-self: center; width: 100%; }
.docente-marco { position: relative; border-radius: 28px; overflow: hidden; aspect-ratio: 4 / 5; box-shadow: 0 50px 90px -45px rgba(6, 36, 12, .7); transform: translateY(var(--py, 0)); }
.docente-marco::before { content: ""; position: absolute; inset: -2px; border-radius: inherit; z-index: 1; pointer-events: none; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25); }
.docente-marco img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 12%; }
.docente-foto::before { content: ""; position: absolute; inset: 8% -8% -8% 12%; border-radius: 32px; background: linear-gradient(150deg, #7c5cff, #342590); opacity: .9; z-index: -1; transform: rotate(3deg); }
.docente-sello { position: absolute; right: -6%; bottom: 8%; padding: .9rem 1.1rem; display: flex; align-items: center; gap: .8rem; border-radius: 18px; }
.docente-sello b { font: 600 2.6rem/1 var(--serif); color: var(--brand); letter-spacing: -.03em; }
.docente-sello b::after { content: "+"; }
.docente-sello span { font-size: .78rem; line-height: 1.25; color: var(--ink-2); }
.docente-rol { font: italic 500 1.2rem/1.3 var(--serif); color: var(--brand); margin: 0 0 1.2rem; }
.docente .chips-d { list-style: none; display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.3rem 0 1.6rem; padding: 0; }
.chips-d li { font-size: .82rem; font-weight: 600; padding: .35rem .85rem; border-radius: 99px; background: var(--brand-soft); color: var(--brand-2); }
.docente-pie { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.docente-mini { display: flex; gap: 1rem; align-items: center; }
.docente-mini img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; object-position: 50% 15%; border: 2px solid var(--brand-soft); }
.docente-mini b { display: block; line-height: 1.25; }
.docente-mini small { color: var(--muted); }
@media (max-width: 860px) { .docente-grid { grid-template-columns: 1fr; } .docente-sello { right: 0; } }

/* ==========================================================================
   Menú lateral del aula: píldora flotante redondeada, siempre abierta y
   compacta para que quepa todo en pantalla sin desplazarse.
   ========================================================================== */
@media (min-width: 961px) {
  .shell.rail { grid-template-columns: 252px minmax(0, 1fr); }
  .rail .side {
    width: 228px; justify-self: start; margin: .75rem 0 .75rem .75rem; height: calc(100vh - 1.5rem);
    padding: .65rem .55rem; gap: .3rem; border: 1px solid var(--line); border-radius: 24px;
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
    overflow-y: auto; overflow-x: hidden; scrollbar-width: none;
    box-shadow: 0 10px 34px -18px rgba(10, 40, 14, .28);
  }
  .rail .side::-webkit-scrollbar { display: none; }
  .rail .side-top { padding: .15rem .35rem .3rem; }
  .rail .side .marca { padding: 0; gap: .6rem; font-size: .98rem; line-height: 1.1; }
  .rail .marca .marca-sello { width: 32px; height: 32px; }
  .rail .marca small { font-size: .68rem; margin-top: 2px; }
  .side-pin { display: none; }

  .rail .nav-g { gap: 1px; }
  .rail .nav-a { padding: .4rem .65rem; gap: .65rem; border-radius: 12px; font-size: .88rem; line-height: 1.2; }
  .rail .nav-a svg { width: 18px; height: 18px; flex: none; }
  .rail .nav-a.on { background: var(--brand-soft); }
  .rail .nav-mod { gap: .65rem; }
  .rail .nav-mod .dot { width: 20px; height: 20px; font-size: .68rem; }
  .rail .nav-a .lock { margin-left: auto; }
  .rail .nav-g h4 { margin: .55rem .65rem .15rem; font: 600 .66rem/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
  .rail .nav-prox { display: flex; align-items: center; gap: .65rem; padding: .3rem .65rem; font-size: .76rem; color: var(--muted); }
  .rail .nav-prox .dots { display: flex; gap: 5px; margin-left: 1px; }
  .rail .nav-prox .dots i { width: 20px; height: 20px; border-radius: 50%; background: var(--surface-3); color: var(--muted); display: grid; place-items: center; font: 600 .66rem/1 var(--sans); font-style: normal; opacity: .75; }
  .rail .nav-prox span { margin-left: .1rem; }

  .rail .side-foot { padding-top: .5rem; gap: .25rem; margin-top: auto; }
  .rail .usr { padding: .2rem .35rem; gap: .6rem; border-radius: 12px; }
  .rail .usr:hover { background: var(--surface-2); }
  .rail .usr .avatar { width: 32px; height: 32px; font-size: .78rem; }
  .rail .usr b { font-size: .84rem; line-height: 1.15; }
  .rail .usr small { font-size: .7rem; }
  .rail .side-btns { gap: .35rem; }
  .rail .side-btns form { flex: 1; margin: 0; }
  .rail .side-btns .btn { padding: .4rem .6rem; border-radius: 11px; font-size: .82rem; }
  .rail .side-btns > .btn { flex: none; }
  .rail .side-btns form .btn { width: 100%; justify-content: center; gap: .4rem; }
  body.modo-examen .shell.rail { grid-template-columns: 1fr; }
}
@media (max-width: 960px) {
  .shell.rail { grid-template-columns: 1fr; }
  .side-pin { display: none; }
  .rail .nav-prox { display: flex; align-items: center; gap: .65rem; padding: .35rem .7rem; font-size: .8rem; color: var(--muted); }
  .rail .nav-prox .dots { display: flex; gap: 5px; }
  .rail .nav-prox .dots i { width: 22px; height: 22px; border-radius: 50%; background: var(--surface-3); display: grid; place-items: center; font: 600 .7rem/1 var(--sans); font-style: normal; opacity: .75; }
  .rail .side-btns form { flex: 1; }
}

/* ==========================================================================
   Lección dividida en partes (cada una con su hueco de vídeo)
   ========================================================================== */
.partes { display: grid; gap: 1.25rem; margin: 1.5rem 0 2rem; }
.parte { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: clamp(1rem, 2.4vw, 1.6rem); scroll-margin-top: 1rem; position: relative; transition: border-color .3s, box-shadow .3s; }
.parte:target, .parte.activa { border-color: color-mix(in srgb, var(--brand) 45%, var(--line)); box-shadow: 0 14px 40px -22px rgba(20, 70, 20, .45); }
.parte-h { display: flex; align-items: center; gap: .9rem; margin-bottom: 1rem; }
.parte-n { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 16px; background: var(--brand-soft); color: var(--brand-2); flex: none; line-height: 1; text-align: center; }
.parte-n b { font: 600 1.35rem/1 var(--serif); display: block; }
.parte-n i { font: 500 .62rem/1 var(--sans); font-style: normal; opacity: .65; margin-top: 2px; display: block; }
.parte-t { flex: 1; min-width: 0; }
.parte-t h2 { margin: 0 !important; font-size: clamp(1.2rem, 1rem + 1vw, 1.55rem) !important; line-height: 1.25; }
.parte-m { display: inline-flex; align-items: center; gap: .35rem; margin-top: .25rem; font: 500 .8rem/1 var(--sans); color: var(--muted); }
.parte-ok { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-3); color: transparent; flex: none; transition: .3s; }
.parte.vista .parte-ok { background: var(--ok); color: #fff; }
.parte .manual { max-width: none; font-size: 1.15rem; }
.parte .manual > :last-child { margin-bottom: 0; }
.parte .video { margin-bottom: 1.2rem; }
.parte-f { display: flex; align-items: center; justify-content: space-between; gap: .75rem; margin-top: 1.2rem; padding-top: .9rem; border-top: 1px dashed var(--line); }
.parte-f:empty { display: none; }

.video-ph-parte { position: relative; display: flex; align-items: center; gap: 1rem; padding: 1rem 1.2rem; min-height: 96px; margin-bottom: 1.2rem; border-radius: 16px; overflow: hidden; color: #fff; background: #17142e; isolation: isolate; }
.video-ph-parte .vph-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; opacity: .75; transition: transform .8s cubic-bezier(.2, .8, .2, 1); }
.video-ph-parte::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(4, 22, 8, .82), rgba(4, 22, 8, .35)); }
.video-ph-parte:hover .vph-img { transform: scale(1.06); }
.vph-play { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; flex: none; border: 1.5px solid rgba(255, 255, 255, .55); background: rgba(255, 255, 255, .12); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.vph-t b { display: block; font: 600 1.02rem/1.25 var(--serif); }
.vph-t small { display: block; margin-top: .15rem; font: 500 .78rem/1.3 var(--sans); opacity: .78; }

.toc-cont { float: right; font: 600 .78rem/1 var(--sans); color: var(--brand-2); }
.toc-bar { height: 5px; margin: -.2rem 0 .7rem; }
.toc a { display: flex; align-items: flex-start; gap: .55rem; }
.toc-n { flex: none; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font: 600 .68rem/1 var(--sans); background: var(--surface-3); color: var(--ink-2); margin-top: 1px; transition: .25s; }
.toc a.visto .toc-n { background: var(--ok); color: #fff; }
.toc a.on .toc-n { background: var(--brand); color: var(--brand-ink); }
@media (max-width: 640px) { .parte { border-radius: 18px; } .parte-n { width: 44px; height: 44px; } .parte-ok { display: none; } }

/* lista de lecciones con miniatura */
.lec { grid-template-columns: 96px 1fr auto; gap: 1rem; padding: .7rem 1.1rem .7rem .7rem; }
.lec-thumb { position: relative; width: 96px; height: 60px; border-radius: 12px; overflow: hidden; background: color-mix(in srgb, var(--brand-2) 70%, #000); display: block; }
.lec-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s cubic-bezier(.2, .8, .2, 1); }
.lec:hover .lec-thumb img { transform: scale(1.08); }
.lec-thumb .lec-ico { position: absolute; left: 6px; bottom: 6px; width: 24px; height: 24px; font-size: .72rem; border: 1.5px solid rgba(255, 255, 255, .85); box-shadow: 0 2px 8px rgba(0, 0, 0, .3); }
.lec.off .lec-thumb img { filter: grayscale(.6) brightness(.8); }
@media (max-width: 560px) { .lec { grid-template-columns: 72px 1fr auto; gap: .75rem; } .lec-thumb { width: 72px; height: 52px; } .lec .badge { display: none; } }