/* ==========================================================================
   VISION ENGLISH — GEO LEVELS v3
   Portales 3D (cubo dorado / rombo de cristal / orbe), modo "dentro del
   cuerpo", materiales premium de nodos y folleto mejorado.
   Se carga DESPUES de styles.css: gana en cascada con igual especificidad.
   ========================================================================== */

:root {
  --geo-gold-1: #fff3c4; --geo-gold-2: #f7d774; --geo-gold-3: #d4a72c;
  --geo-gold-4: #8a6a1a; --geo-gold-5: #5c470e;
  --geo-pink-1: #f9a8d4; --geo-pink-2: #f472b6; --geo-pink-3: #db2777;
  --geo-red-1: #ef4444;  --geo-red-2: #b91c1c;  --geo-red-3: #7f1d1d;
  --geo-ink: #1e1b4b;
}

/* ── ESCENA DEL PORTAL ─────────────────────────────────────────────────── */
.geo-portal {
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  cursor: pointer; user-select: none; -webkit-tap-highlight-color: transparent;
}
.geo-portal-stage {
  position: relative; width: 240px; height: 240px;
  display: grid; place-items: center;
  perspective: 950px;
}
.geo-portal-label {
  text-align: center; padding: 10px 22px; border-radius: 999px;
  background: rgba(255,255,255,.75); backdrop-filter: blur(8px);
  border: 1px solid rgba(30,27,75,.08);
  box-shadow: 0 10px 24px rgba(30,27,75,.12);
  transition: transform .3s cubic-bezier(.22,.9,.28,1.2), box-shadow .3s;
}
.geo-portal-label strong {
  display: block; font-size: 15px; font-weight: 800; color: var(--geo-ink);
}
.geo-portal-label small { font-size: 12px; font-weight: 600; opacity: .55; }
.geo-portal:hover .geo-portal-label { transform: translateY(-3px) scale(1.04); }
.geo-portal:active .geo-portal-label { transform: scale(.96); }

.gp-shadow {
  position: absolute; bottom: 6px; left: 50%; width: 150px; height: 26px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(20,15,40,.38), transparent 70%);
  filter: blur(4px); border-radius: 50%;
  animation: gpShadowBob 5s ease-in-out infinite;
}
@keyframes gpShadowBob {
  0%,100% { transform: translateX(-50%) scaleX(1); opacity: .9; }
  50%     { transform: translateX(-50%) scaleX(.78); opacity: .55; }
}

/* ── CUBO DORADO 3D ────────────────────────────────────────────────────── */
.gp-cube {
  --s: 148px;
  position: relative; width: var(--s); height: var(--s);
  transform-style: preserve-3d;
  animation: gpCubeSpin 16s linear infinite;
}
@keyframes gpCubeSpin {
  from { transform: rotateX(-20deg) rotateY(0deg) translateY(-8px); }
  to   { transform: rotateX(-20deg) rotateY(360deg) translateY(-8px); }
}
.geo-portal:hover .gp-cube { animation-duration: 5s; }
.gp-face {
  position: absolute; inset: 0; border-radius: 6px;
  border: 1px solid rgba(92,71,14,.35);
  box-shadow: inset 0 0 40px rgba(255,243,196,.35);
  backface-visibility: visible;
}
.gp-f-front { transform: translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, var(--geo-gold-1) 0%, var(--geo-gold-2) 32%, var(--geo-gold-3) 68%, var(--geo-gold-4) 100%); }
.gp-f-back  { transform: rotateY(180deg) translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, var(--geo-gold-3), var(--geo-gold-4) 60%, var(--geo-gold-5)); }
.gp-f-right { transform: rotateY(90deg) translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, var(--geo-gold-2), var(--geo-gold-3) 55%, var(--geo-gold-4)); }
.gp-f-left  { transform: rotateY(-90deg) translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, var(--geo-gold-2), var(--geo-gold-3) 55%, var(--geo-gold-4)); }
.gp-f-top   { transform: rotateX(90deg) translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, #fffbe6, var(--geo-gold-1) 45%, var(--geo-gold-2));
  box-shadow: inset 0 0 46px rgba(255,255,255,.55); }
.gp-f-bottom{ transform: rotateX(-90deg) translateZ(calc(var(--s)/2));
  background: linear-gradient(155deg, var(--geo-gold-4), var(--geo-gold-5)); }
.gp-cube-glow {
  position: absolute; inset: -30px; border-radius: 30px;
  background: radial-gradient(circle, rgba(247,215,116,.5), transparent 65%);
  transform: translateZ(-40px); filter: blur(10px);
}

/* ── ROMBO DE CRISTAL ROJO/ROSA (octaedro) ─────────────────────────────── */
.gp-gem {
  --b: 168px; --h: 122px; --tilt: 47deg;
  position: relative; width: var(--b); height: calc(var(--h)*2);
  transform-style: preserve-3d;
  animation: gpGemSpin 14s linear infinite;
}
@keyframes gpGemSpin {
  from { transform: rotateX(-12deg) rotateY(0deg) translateY(-6px); }
  to   { transform: rotateX(-12deg) rotateY(360deg) translateY(-6px); }
}
.geo-portal:hover .gp-gem { animation-duration: 4.5s; }
.gp-pyr { position: absolute; left: 50%; top: 50%; width: 0; height: 0;
  transform-style: preserve-3d; }
.gp-pyr-top { transform: translate(-50%, -100%); }
.gp-pyr-bot { transform: translate(-50%, 0) scaleY(-1); }
.gp-face-t {
  position: absolute; left: calc(var(--b)/-2); bottom: 0;
  width: var(--b); height: var(--h);
  clip-path: polygon(50% 0, 0 100%, 100% 100%);
  transform-origin: 50% 100%;
  transform: rotateY(calc(90deg * var(--i))) translateZ(calc(var(--b)/2)) rotateX(var(--tilt));
  backface-visibility: visible;
}
/* alterna rosa fuerte y rojo por faceta + brillo especular */
.gp-face-t:nth-child(odd)  { background: linear-gradient(200deg, var(--geo-pink-1) 0%, var(--geo-pink-2) 40%, var(--geo-pink-3) 100%); }
.gp-face-t:nth-child(even) { background: linear-gradient(200deg, var(--geo-red-1) 0%, var(--geo-red-2) 55%, var(--geo-red-3) 100%); }
.gp-face-t::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,.55) 48%, transparent 62%);
  mix-blend-mode: screen;
}
.gp-gem-glow {
  position: absolute; inset: -34px; border-radius: 40px;
  background: radial-gradient(circle, rgba(244,114,182,.55), rgba(239,68,68,.25) 55%, transparent 72%);
  filter: blur(12px); transform: translateZ(-50px);
}

/* ── ORBE GALAXIA (Advanced) ───────────────────────────────────────────── */
.gp-orb {
  --d: 172px;
  position: relative; width: var(--d); height: var(--d); border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255,255,255,.85) 0%, transparent 18%),
    radial-gradient(circle at 68% 70%, rgba(45,212,191,.5) 0%, transparent 34%),
    radial-gradient(circle at 30% 72%, rgba(244,114,182,.55) 0%, transparent 38%),
    radial-gradient(circle at 50% 50%, #6d28d9 0%, #3b1472 58%, #1e0a44 100%);
  box-shadow:
    inset -18px -22px 44px rgba(10,5,30,.65),
    inset 10px 12px 30px rgba(255,255,255,.18),
    0 0 60px rgba(124,58,237,.45);
  animation: gpOrbFloat 6s ease-in-out infinite;
}
.gp-orb::before {
  content: ""; position: absolute; inset: -14px; border-radius: 50%;
  border: 2px solid rgba(167,139,250,.4);
  border-top-color: rgba(255,255,255,.85); border-bottom-color: rgba(45,212,191,.6);
  animation: gpOrbRing 7s linear infinite;
}
.gp-orb::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 40%, rgba(255,255,255,.28) 50%, transparent 60% 100%);
  animation: gpOrbRing 9s linear infinite reverse;
  mix-blend-mode: screen;
}
@keyframes gpOrbFloat { 0%,100% { transform: translateY(-8px); } 50% { transform: translateY(8px); } }
@keyframes gpOrbRing  { to { transform: rotate(360deg); } }
.geo-portal:hover .gp-orb { animation-duration: 2.6s; }

/* ── ANIMACION DE "ENTRAR" (clone expandiendose) ───────────────────────── */
.geo-fly {
  position: fixed; z-index: 9999; pointer-events: none;
  transform-origin: 50% 50%; will-change: transform, opacity;
}

/* ── MODO DENTRO DEL CUERPO (sala 3D girando) ──────────────────────────── */
.geo-inside { position: relative; }
.geo-room {
  position: absolute; inset: 0; overflow: hidden;
  perspective: 1100px; pointer-events: none; z-index: 0;
}
.geo-room-inner {
  position: absolute; left: 50%; top: 45%;
  transform-style: preserve-3d;
}
/* sala cubo dorada */
.geo-room-cube {
  width: 165vmin; height: 165vmin;
  margin: -82.5vmin 0 0 -82.5vmin;
  position: relative; transform-style: preserve-3d;
  animation: geoRoomSpin 55s linear infinite;
}
@keyframes geoRoomSpin {
  from { transform: rotateX(-8deg) rotateY(0deg); }
  to   { transform: rotateX(-8deg) rotateY(-360deg); }
}
.gr-face {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(247,215,116,.10), rgba(212,167,44,.05) 55%, rgba(138,106,26,.12));
  border: 2px solid rgba(212,167,44,.35);
  box-shadow: inset 0 0 90px rgba(247,215,116,.14);
  backface-visibility: visible;
}
.gr-f1 { transform: translateZ(82.5vmin); }
.gr-f2 { transform: rotateY(180deg) translateZ(82.5vmin); }
.gr-f3 { transform: rotateY(90deg) translateZ(82.5vmin); }
.gr-f4 { transform: rotateY(-90deg) translateZ(82.5vmin); }
.gr-f5 { transform: rotateX(90deg) translateZ(82.5vmin); }
.gr-f6 { transform: rotateX(-90deg) translateZ(82.5vmin); }
/* sala rombo de cristal */
.geo-room-gem {
  --b: 200vmin; --h: 145vmin;
  width: 0; height: 0; position: relative; transform-style: preserve-3d;
  animation: geoRoomSpin 45s linear infinite;
}
.geo-room-gem .gp-face-t {
  left: calc(var(--b)/-2); bottom: auto;
  width: var(--b); height: var(--h);
  border: 2px solid rgba(244,114,182,.3);
  background: linear-gradient(200deg, rgba(249,168,212,.12), rgba(219,39,119,.07) 60%, rgba(185,28,28,.12));
}
/* sala orbe */
.geo-room-orb {
  --d: 190vmin;
  position: relative; transform-style: preserve-3d;
  animation: geoRoomSpin 60s linear infinite;
}
.geo-room-orb::before {
  content: ""; position: absolute; left: calc(var(--d)/-2); top: calc(var(--d)/-2);
  width: var(--d); height: var(--d); border-radius: 50%;
  border: 3px solid rgba(167,139,250,.35);
  background: radial-gradient(circle, rgba(124,58,237,.10), transparent 62%);
  box-shadow: inset 0 0 120px rgba(124,58,237,.18);
}
.geo-room-orb::after {
  content: ""; position: absolute; left: calc(var(--d)/-2); top: calc(var(--d)/-2);
  width: var(--d); height: var(--d); border-radius: 50%;
  border: 2px dashed rgba(45,212,191,.3);
  transform: rotateX(72deg);
}

/* el contenido real queda arriba y respirable */
.geo-inside .level-hero-card,
.geo-inside .level-subtabs-container,
.geo-inside .duo-path-container { position: relative; z-index: 2; }
.geo-inside .level-hero-card {
  background: rgba(255,255,255,.86); backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(20,15,40,.22);
}
.geo-inside.geo-theme-cube   .level-hero-card { border: 1px solid rgba(212,167,44,.4); }
.geo-inside.geo-theme-gem    .level-hero-card { border: 1px solid rgba(244,114,182,.4); }
.geo-inside.geo-theme-orb    .level-hero-card { border: 1px solid rgba(124,58,237,.4); }
.geo-inside .duo-path-container { border-radius: 28px; }

/* boton salir */
.geo-exit-btn {
  position: absolute; top: 14px; right: 16px; z-index: 5;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border: none; border-radius: 999px; cursor: pointer;
  font-weight: 800; font-size: 13px; color: #fff;
  background: linear-gradient(135deg, #312e81, #1e1b4b);
  box-shadow: 0 10px 24px rgba(30,27,75,.35);
  transition: transform .25s, box-shadow .25s;
}
.geo-exit-btn:hover { transform: translateY(-2px) scale(1.04); }

/* ── MATERIALES PREMIUM DE LOS NODOS DE LA RUTA ────────────────────────── */
/* Oro pulido para el cubo (se redefine lo que styles.css puso plano) */
.shape-cube .geo-face-front {
  background: linear-gradient(155deg, var(--geo-gold-1), var(--geo-gold-2) 35%, var(--geo-gold-3) 70%, var(--geo-gold-4));
  box-shadow: inset 0 0 18px rgba(255,243,196,.6);
}
.shape-cube .geo-face-top {
  background: linear-gradient(155deg, #fffbe6, var(--geo-gold-1) 50%, var(--geo-gold-2));
  box-shadow: inset 0 0 20px rgba(255,255,255,.6);
}
.shape-cube .geo-face-side {
  background: linear-gradient(155deg, var(--geo-gold-2), var(--geo-gold-3) 55%, var(--geo-gold-4));
}
.shape-cube.status-active .geo-face-front {
  background: linear-gradient(155deg, #fff8dc, var(--geo-gold-2) 35%, var(--geo-gold-3) 70%, var(--geo-gold-4));
}
/* Cristal rojo/rosa para el rombo */
.shape-rhombus .geo-face-front {
  background: linear-gradient(215deg, var(--geo-pink-1) 0%, var(--geo-pink-2) 35%, var(--geo-red-2) 75%, var(--geo-red-3));
  box-shadow: inset 0 0 22px rgba(255,255,255,.45);
}
.shape-rhombus .geo-face-top {
  background: linear-gradient(215deg, #fff, var(--geo-pink-1) 45%, var(--geo-pink-2));
}
.shape-rhombus .geo-face-side {
  background: linear-gradient(215deg, var(--geo-pink-3), var(--geo-red-2) 60%, var(--geo-red-3));
}
/* Esfera galaxia */
.shape-sphere .geo-face.geo-face-front {
  background:
    radial-gradient(circle at 32% 28%, rgba(255,255,255,.8) 0%, transparent 20%),
    radial-gradient(circle at 68% 72%, rgba(45,212,191,.45) 0%, transparent 36%),
    radial-gradient(circle at 30% 70%, rgba(244,114,182,.5) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, #7c3aed 0%, #3b1472 60%, #1e0a44 100%);
  box-shadow: inset -10px -12px 26px rgba(10,5,30,.6), 0 0 22px rgba(124,58,237,.4);
}

/* ── FOLLETO (modal de leccion) MEJORADO ───────────────────────────────── */
.path-node-modal-card {
  position: relative; overflow: hidden;
  border-radius: 26px !important;
  background: rgba(255,255,255,.92) !important;
  backdrop-filter: blur(14px);
  box-shadow: 0 30px 80px rgba(20,15,40,.35) !important;
  border: 1px solid rgba(30,27,75,.08);
  transform-style: preserve-3d; will-change: transform;
  transition: transform .18s ease-out;
}
/* franja tematica segun la figura de origen */
.path-node-modal-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 7px;
}
#pathNodeModal[data-shape="shape-cube"] .path-node-modal-card::before {
  background: linear-gradient(90deg, var(--geo-gold-1), var(--geo-gold-3), var(--geo-gold-2));
}
#pathNodeModal[data-shape="shape-rhombus"] .path-node-modal-card::before {
  background: linear-gradient(90deg, var(--geo-pink-2), var(--geo-red-2), var(--geo-pink-1));
}
#pathNodeModal[data-shape="shape-sphere"] .path-node-modal-card::before {
  background: linear-gradient(90deg, #7c3aed, #2dd4bf, #f472b6);
}
/* brillo que recorre la tarjeta */
.path-node-modal-card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,.35) 50%, transparent 65%);
  transform: translateX(-120%);
  animation: geoCardShine 4.5s ease-in-out infinite;
}
@keyframes geoCardShine { 0%,60% { transform: translateX(-120%); } 100% { transform: translateX(120%); } }
#pathNodeModal .modal-close {
  top: 14px !important; right: 14px !important;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(30,27,75,.06); font-size: 20px; line-height: 1;
  transition: transform .25s, background .25s;
}
#pathNodeModal .modal-close:hover { transform: rotate(90deg) scale(1.1); background: rgba(30,27,75,.12); }
/* entrada con rebote suave (la clase path-origin-open ya la pone script.js) */
#pathNodeModal.path-origin-open .path-node-modal-card { animation: geoModalIn .55s cubic-bezier(.22,.9,.28,1.15); }
@keyframes geoModalIn {
  from { transform: scale(.82) translateY(26px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}

/* ── RESPONSIVE / ACCESIBILIDAD ────────────────────────────────────────── */
@media (max-width: 720px) {
  .gp-cube { --s: 112px; }
  .gp-gem  { --b: 128px; --h: 93px; }
  .gp-orb  { --d: 132px; }
  .geo-portal-stage { width: 190px; height: 190px; }
}
@media (prefers-reduced-motion: reduce) {
  .gp-cube, .gp-gem, .gp-orb, .gp-orb::before, .gp-orb::after,
  .geo-room-cube, .geo-room-gem, .geo-room-orb, .gp-shadow,
  .path-node-modal-card::after { animation: none !important; }
}

/* ==========================================================================
   LEVELS UI SYSTEM - Design Intelligence pass 01
   Un solo lenguaje para Basic, Intermediate y Advanced. El mundo cambia por
   color y atmosfera; la jerarquia, los estados y la ruta siguen constantes.
   ========================================================================== */

#level-basic,
#level-intermediate,
#level-advanced {
  --level-accent: #f5b52d;
  --level-accent-rgb: 245, 181, 45;
  --level-ink: #182337;
  --level-canvas: #eef4f7;
  position: relative;
  isolation: isolate;
  min-height: 100%;
  padding: clamp(18px, 3vw, 38px) clamp(12px, 3vw, 34px) 72px;
  background: radial-gradient(70% 34% at 50% 0%, rgba(var(--level-accent-rgb), .18), transparent 72%), linear-gradient(180deg, var(--level-canvas), #f8fafb 78%);
}

#level-intermediate { --level-accent: #e24b62; --level-accent-rgb: 226, 75, 98; --level-canvas: #f6eff0; }
#level-advanced { --level-accent: #7658df; --level-accent-rgb: 118, 88, 223; --level-canvas: #f1f0f8; }

body.dark #level-basic,
body.dark #level-intermediate,
body.dark #level-advanced {
  --level-ink: #f4f7fb;
  --level-canvas: #0c1421;
  background: radial-gradient(70% 34% at 50% 0%, rgba(var(--level-accent-rgb), .2), transparent 70%), radial-gradient(45% 40% at 86% 42%, rgba(var(--level-accent-rgb), .08), transparent 72%), linear-gradient(180deg, #0d1725, #090f19 82%);
}

#level-basic::before,
#level-intermediate::before,
#level-advanced::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .34;
  background-image: linear-gradient(rgba(var(--level-accent-rgb), .045) 1px, transparent 1px), linear-gradient(90deg, rgba(var(--level-accent-rgb), .045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 82%);
}

/* Compact HUD: the geometric body is the visual anchor, not a fake portal. */
#level-basic .level-hero-card,
#level-intermediate .level-hero-card,
#level-advanced .level-hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 280px);
  align-items: center;
  gap: clamp(18px, 4vw, 60px);
  max-width: 1180px;
  margin: 0 auto 18px;
  padding: clamp(22px, 4vw, 42px);
  overflow: hidden;
  border: 1px solid rgba(var(--level-accent-rgb), .25);
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255,255,255,.88), rgba(255,255,255,.54)), radial-gradient(circle at 86% 50%, rgba(var(--level-accent-rgb), .18), transparent 40%);
  box-shadow: 0 24px 60px rgba(22, 35, 53, .1), inset 0 1px 0 rgba(255,255,255,.8);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
}

body.dark #level-basic .level-hero-card,
body.dark #level-intermediate .level-hero-card,
body.dark #level-advanced .level-hero-card {
  background: linear-gradient(135deg, rgba(19, 31, 48, .9), rgba(13, 21, 34, .7)), radial-gradient(circle at 86% 50%, rgba(var(--level-accent-rgb), .2), transparent 42%);
  border-color: rgba(var(--level-accent-rgb), .34);
  box-shadow: 0 28px 70px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.08);
}

#level-basic .hero-eyebrow,
#level-intermediate .hero-eyebrow,
#level-advanced .hero-eyebrow { color: var(--level-accent); font-size: .72rem; font-weight: 900; letter-spacing: .12em; }

#level-basic .hero-title,
#level-intermediate .hero-title,
#level-advanced .hero-title { margin: 8px 0 10px; color: var(--level-ink); font-size: clamp(2rem, 4vw, 3.7rem); line-height: .98; letter-spacing: -.045em; }

#level-basic .hero-subtitle,
#level-intermediate .hero-subtitle,
#level-advanced .hero-subtitle { max-width: 610px; margin: 0; color: color-mix(in srgb, var(--level-ink) 67%, transparent); font-size: clamp(.92rem, 1.5vw, 1.05rem); line-height: 1.55; }

#level-basic .hero-mascot-col,
#level-intermediate .hero-mascot-col,
#level-advanced .hero-mascot-col { min-height: 190px; display: grid !important; place-items: center; }

#level-basic .geo-portal,
#level-intermediate .geo-portal,
#level-advanced .geo-portal { pointer-events: none; }

/* The level body is a visual anchor, not a hidden portal. */
#level-basic .geo-portal,
#level-intermediate .geo-portal,
#level-advanced .geo-portal {
  display: flex !important;
  align-items: center;
  justify-content: center;
}

#level-basic .geo-portal-stage,
#level-intermediate .geo-portal-stage,
#level-advanced .geo-portal-stage { width: clamp(170px, 22vw, 240px); height: clamp(170px, 22vw, 240px); }

#level-basic .geo-body-img,
#level-intermediate .geo-body-img,
#level-advanced .geo-body-img { width: 84%; animation: levelObjectFloat 6s ease-in-out infinite; filter: drop-shadow(0 22px 24px rgba(var(--level-accent-rgb), .24)); }

#level-basic .gp-shadow,
#level-intermediate .gp-shadow,
#level-advanced .gp-shadow { background: radial-gradient(ellipse, rgba(var(--level-accent-rgb), .42), transparent 70%); }

@keyframes levelObjectFloat { 0%, 100% { transform: translateY(0) rotate(-1deg); } 50% { transform: translateY(-10px) rotate(1deg); } }

#level-basic .hero-progress-wrapper,
#level-intermediate .hero-progress-wrapper,
#level-advanced .hero-progress-wrapper { max-width: 640px; margin-top: 25px; }

#level-basic .hero-progress-fill,
#level-intermediate .hero-progress-fill,
#level-advanced .hero-progress-fill { background: linear-gradient(90deg, var(--level-accent), color-mix(in srgb, var(--level-accent) 55%, white)); box-shadow: 0 0 18px rgba(var(--level-accent-rgb), .42); }

#level-basic .hero-cta-btn,
#level-intermediate .hero-cta-btn,
#level-advanced .hero-cta-btn { border: 0; background: var(--level-accent); color: #fff; box-shadow: 0 10px 22px rgba(var(--level-accent-rgb), .25); }

/* Sublevel switcher becomes a sticky control bar. */
#level-basic .level-subtabs-container,
#level-intermediate .level-subtabs-container,
#level-advanced .level-subtabs-container { position: sticky; top: 10px; z-index: 8; max-width: 1180px; margin: 0 auto 14px; padding: 8px; border: 1px solid rgba(var(--level-accent-rgb), .18); border-radius: 16px; background: color-mix(in srgb, var(--level-canvas) 72%, transparent); box-shadow: 0 12px 28px rgba(20, 30, 45, .08); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }

#level-basic .subtabs-pill,
#level-intermediate .subtabs-pill,
#level-advanced .subtabs-pill { display: flex; gap: 6px; width: fit-content; margin: 0 auto; padding: 4px; background: rgba(127, 145, 165, .12); border-radius: 12px; }

#level-basic .subtab-btn.active,
#level-intermediate .subtab-btn.active,
#level-advanced .subtab-btn.active { color: #fff; background: var(--level-accent); box-shadow: 0 5px 12px rgba(var(--level-accent-rgb), .25); }

/* Calm learning rail: nodes carry the color and interaction. */
#level-basic .duo-path-container,
#level-intermediate .duo-path-container,
#level-advanced .duo-path-container { position: relative; max-width: 900px; margin: 0 auto; padding: 24px clamp(12px, 5vw, 80px) 68px; overflow: hidden; border: 1px solid rgba(var(--level-accent-rgb), .16); border-radius: 30px; background: rgba(255,255,255,.34); box-shadow: 0 26px 70px rgba(28, 42, 60, .1), inset 0 1px 0 rgba(255,255,255,.7); }

body.dark #level-basic .duo-path-container,
body.dark #level-intermediate .duo-path-container,
body.dark #level-advanced .duo-path-container { background: rgba(8, 16, 27, .46); box-shadow: 0 28px 70px rgba(0,0,0,.26), inset 0 1px 0 rgba(255,255,255,.06); }

#level-basic .path-center-line,
#level-intermediate .path-center-line,
#level-advanced .path-center-line { width: 2px; background: linear-gradient(180deg, transparent, rgba(var(--level-accent-rgb), .48) 8%, rgba(var(--level-accent-rgb), .18) 92%, transparent); box-shadow: 0 0 16px rgba(var(--level-accent-rgb), .22); }

#level-basic .duo-path-container .path-row:has(.geo-node),
#level-intermediate .duo-path-container .path-row:has(.geo-node),
#level-advanced .duo-path-container .path-row:has(.geo-node) { min-height: 156px; }

#level-basic .duo-path-container .geo-node,
#level-intermediate .duo-path-container .geo-node,
#level-advanced .duo-path-container .geo-node { width: 116px; height: 116px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; background: radial-gradient(circle at 35% 25%, rgba(255,255,255,.32), rgba(var(--level-accent-rgb), .16) 62%, rgba(var(--level-accent-rgb), .06)); box-shadow: 0 10px 0 rgba(var(--level-accent-rgb), .18), 0 18px 34px rgba(20, 30, 45, .16), inset 0 2px 4px rgba(255,255,255,.5); }

#level-basic .duo-path-container .geo-node .geo-shape,
#level-intermediate .duo-path-container .geo-node .geo-shape,
#level-advanced .duo-path-container .geo-node .geo-shape { width: 78px; height: 78px; filter: drop-shadow(0 7px 12px rgba(var(--level-accent-rgb), .32)); }

#level-basic .duo-path-container .geo-node.status-active,
#level-intermediate .duo-path-container .geo-node.status-active,
#level-advanced .duo-path-container .geo-node.status-active { box-shadow: 0 0 0 4px rgba(var(--level-accent-rgb), .45), 0 0 0 10px rgba(var(--level-accent-rgb), .12), 0 10px 0 rgba(var(--level-accent-rgb), .26), 0 20px 40px rgba(var(--level-accent-rgb), .25); animation: levelNodePulse 2.4s ease-in-out infinite; }

#level-basic .duo-path-container .geo-node.status-locked,
#level-intermediate .duo-path-container .geo-node.status-locked,
#level-advanced .duo-path-container .geo-node.status-locked { opacity: .56; filter: saturate(.22); }

#level-basic .duo-path-container .geo-node.status-completed,
#level-intermediate .duo-path-container .geo-node.status-completed,
#level-advanced .duo-path-container .geo-node.status-completed { box-shadow: 0 10px 0 rgba(31, 157, 117, .2), 0 18px 34px rgba(31, 157, 117, .17), inset 0 2px 4px rgba(255,255,255,.5); }

@keyframes levelNodePulse { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-3px) scale(1.025); } }

/* Basic keeps the reef identity, but the path remains the hero. */
#level-basic .reef-tortuga-libre,
#level-basic .reef-pez,
#level-basic .reef-deco,
#level-basic .burbujas-capa,
#level-basic .ruta-cofre { display: none !important; }

@media (max-width: 760px) {
  #level-basic .level-hero-card,
  #level-intermediate .level-hero-card,
  #level-advanced .level-hero-card { grid-template-columns: 1fr; gap: 8px; padding: 22px 18px 16px; }

  #level-basic .hero-mascot-col,
  #level-intermediate .hero-mascot-col,
  #level-advanced .hero-mascot-col { order: -1; min-height: 126px; }

  #level-basic .geo-portal-stage,
  #level-intermediate .geo-portal-stage,
  #level-advanced .geo-portal-stage { width: 150px; height: 150px; }

  #level-basic .level-subtabs-container,
  #level-intermediate .level-subtabs-container,
  #level-advanced .level-subtabs-container { top: 5px; }

  #level-basic .duo-path-container,
  #level-intermediate .duo-path-container,
  #level-advanced .duo-path-container { padding: 18px 8px 48px; border-radius: 22px; }

  #level-basic .duo-path-container .geo-node,
  #level-intermediate .duo-path-container .geo-node,
  #level-advanced .duo-path-container .geo-node { width: 94px; height: 94px; }

  #level-basic .duo-path-container .geo-node .geo-shape,
  #level-intermediate .duo-path-container .geo-node .geo-shape,
  #level-advanced .duo-path-container .geo-node .geo-shape { width: 62px; height: 62px; }
}

@media (prefers-reduced-motion: reduce) {
  #level-basic .geo-body-img,
  #level-intermediate .geo-body-img,
  #level-advanced .geo-body-img,
  #level-basic .duo-path-container .geo-node.status-active,
  #level-intermediate .duo-path-container .geo-node.status-active,
  #level-advanced .duo-path-container .geo-node.status-active { animation: none; }
}

/* ==========================================================================
   RESPONSIVE LAYOUT CONTRACT - spacing, rhythm and safe bounds
   ========================================================================== */

#level-basic,
#level-intermediate,
#level-advanced {
  --level-gutter: clamp(12px, 3.2vw, 48px);
  --level-section-gap: clamp(18px, 3vw, 42px);
  --level-row-gap: clamp(18px, 3vw, 34px);
  overflow-x: clip;
}

#level-basic > .level-hero-card,
#level-intermediate > .level-hero-card,
#level-advanced > .level-hero-card {
  width: min(100%, 1180px);
  margin-bottom: var(--level-section-gap);
}

#level-basic > .level-subtabs-container,
#level-intermediate > .level-subtabs-container,
#level-advanced > .level-subtabs-container {
  width: min(100%, 1180px);
  margin-bottom: var(--level-section-gap);
}

#level-basic > .duo-path-container,
#level-intermediate > .duo-path-container,
#level-advanced > .duo-path-container {
  width: min(100%, 920px);
  margin-bottom: var(--level-section-gap);
}

#level-basic .duo-path-container .path-row:has(.geo-node),
#level-intermediate .duo-path-container .path-row:has(.geo-node),
#level-advanced .duo-path-container .path-row:has(.geo-node) {
  min-height: clamp(132px, 16vw, 176px);
  margin-block: var(--level-row-gap);
}

#level-basic .duo-path-container .path-row:has(.geo-node) + .path-unit-break,
#level-intermediate .duo-path-container .path-row:has(.geo-node) + .path-unit-break,
#level-advanced .duo-path-container .path-row:has(.geo-node) + .path-unit-break {
  margin-top: clamp(16px, 3vw, 32px);
}

/* At tablet widths, cards stop competing with the central route. */
@media (max-width: 980px) {
  #level-basic .level-hero-card,
  #level-intermediate .level-hero-card,
  #level-advanced .level-hero-card {
    grid-template-columns: minmax(0, 1fr) minmax(150px, 220px);
    gap: 20px;
  }

  #level-basic .duo-path-container,
  #level-intermediate .duo-path-container,
  #level-advanced .duo-path-container {
    padding-inline: clamp(12px, 4vw, 48px);
  }
}

/* Phones get one predictable reading column and no horizontal overflow. */
@media (max-width: 760px) {
  #level-basic,
  #level-intermediate,
  #level-advanced { padding-inline: var(--level-gutter); }

  #level-basic .level-hero-card,
  #level-intermediate .level-hero-card,
  #level-advanced .level-hero-card {
    width: 100%;
    margin-bottom: var(--level-section-gap);
  }

  #level-basic .level-subtabs-container,
  #level-intermediate .level-subtabs-container,
  #level-advanced .level-subtabs-container {
    width: 100%;
    margin-bottom: var(--level-section-gap);
  }

  #level-basic .subtabs-pill,
  #level-intermediate .subtabs-pill,
  #level-advanced .subtabs-pill {
    width: 100%;
  }

  #level-basic .subtab-btn,
  #level-intermediate .subtab-btn,
  #level-advanced .subtab-btn {
    flex: 1 1 0;
    min-width: 0;
  }

  #level-basic .duo-path-container,
  #level-intermediate .duo-path-container,
  #level-advanced .duo-path-container {
    width: 100%;
    margin-bottom: var(--level-section-gap);
    padding: 14px 8px 44px;
  }

  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) {
    min-height: 132px;
    margin-block: 16px;
  }
}

@media (min-width: 1600px) {
  #level-basic,
  #level-intermediate,
  #level-advanced { padding-top: 52px; }

  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) { min-height: 190px; }
}

/* ==========================================================================
   PATH CLEANUP - one lesson, one visual anchor
   ========================================================================== */

#level-basic .duo-path-container,
#level-intermediate .duo-path-container,
#level-advanced .duo-path-container {
  width: min(760px, 100%);
  padding-inline: clamp(10px, 3vw, 34px);
}

#level-basic .duo-path-container .path-row:has(.geo-node),
#level-intermediate .duo-path-container .path-row:has(.geo-node),
#level-advanced .duo-path-container .path-row:has(.geo-node) {
  min-height: clamp(112px, 13vw, 142px) !important;
  margin-block: clamp(8px, 1.5vw, 16px);
}

/* The old reef platforms duplicated the lesson node and created visual noise. */
#level-basic .duo-path-container .geo-node::after,
#level-intermediate .duo-path-container .geo-node::after,
#level-advanced .duo-path-container .geo-node::after {
  content: none !important;
  display: none !important;
  background: none !important;
  box-shadow: none !important;
}

#level-basic .duo-path-container .geo-node,
#level-intermediate .duo-path-container .geo-node,
#level-advanced .duo-path-container .geo-node {
  width: 92px;
  height: 92px;
  box-shadow: 0 7px 0 rgba(var(--level-accent-rgb), .18), 0 12px 24px rgba(20, 30, 45, .14), inset 0 2px 4px rgba(255,255,255,.5);
}

#level-basic .duo-path-container .geo-node .geo-shape,
#level-intermediate .duo-path-container .geo-node .geo-shape,
#level-advanced .duo-path-container .geo-node .geo-shape {
  width: 62px;
  height: 62px;
}

#level-basic .duo-path-container .geo-caption,
#level-intermediate .duo-path-container .geo-caption,
#level-advanced .duo-path-container .geo-caption {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  margin-top: 4px;
  padding: 3px 7px;
  border: 1px solid rgba(var(--level-accent-rgb), .2);
  border-radius: 6px;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  box-shadow: 0 4px 12px rgba(15, 23, 42, .07);
  font-size: .62rem;
  font-weight: 800;
  line-height: 1.1;
  white-space: nowrap;
}

#level-basic .duo-path-container .geo-caption small,
#level-intermediate .duo-path-container .geo-caption small,
#level-advanced .duo-path-container .geo-caption small {
  color: var(--level-accent);
  font-size: .58rem;
  font-weight: 900;
}

#level-basic .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-58px); }
#level-basic .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(58px); }
#level-intermediate .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-58px); }
#level-intermediate .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(58px); }
#level-advanced .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-58px); }
#level-advanced .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(58px); }

#level-basic .duo-path-container .path-node-summary,
#level-intermediate .duo-path-container .path-node-summary,
#level-advanced .duo-path-container .path-node-summary {
  width: min(230px, 100%);
  padding: 11px 13px;
  border-radius: 10px;
}

#level-basic .duo-path-container .path-unit-break,
#level-intermediate .duo-path-container .path-unit-break,
#level-advanced .duo-path-container .path-unit-break {
  width: min(480px, calc(100% - 12px));
  margin-block: 16px 6px;
  padding: 9px 12px;
}

@media (max-width: 760px) {
  #level-basic .duo-path-container,
  #level-intermediate .duo-path-container,
  #level-advanced .duo-path-container { padding-inline: 7px; }

  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) { min-height: 108px !important; margin-block: 6px; }

  #level-basic .duo-path-container .geo-node,
  #level-intermediate .duo-path-container .geo-node,
  #level-advanced .duo-path-container .geo-node { width: 78px; height: 78px; }

  #level-basic .duo-path-container .geo-node .geo-shape,
  #level-intermediate .duo-path-container .geo-node .geo-shape,
  #level-advanced .duo-path-container .geo-node .geo-shape { width: 54px; height: 54px; }

  #level-basic .duo-path-container .path-row.row-left .path-marker-col,
  #level-intermediate .duo-path-container .path-row.row-left .path-marker-col,
  #level-advanced .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-28px); }

  #level-basic .duo-path-container .path-row.row-right .path-marker-col,
  #level-intermediate .duo-path-container .path-row.row-right .path-marker-col,
  #level-advanced .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(28px); }
}

/* Mobile keeps the same three-column route grammar as desktop. The previous
   two-column rule pushed every marker against the left edge. */
@media (max-width: 760px) {
  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 86px minmax(0, 1fr) !important;
    align-items: center;
    column-gap: 4px;
    min-height: 112px !important;
    padding-inline: 0;
  }

  #level-basic .duo-path-container .path-row .path-marker-col,
  #level-intermediate .duo-path-container .path-row .path-marker-col,
  #level-advanced .duo-path-container .path-row .path-marker-col {
    grid-column: 2 !important;
    grid-row: 1 !important;
    justify-self: center;
    transform: none !important;
  }

  #level-basic .duo-path-container .path-row.row-left .path-node-summary,
  #level-intermediate .duo-path-container .path-row.row-left .path-node-summary,
  #level-advanced .duo-path-container .path-row.row-left .path-node-summary {
    grid-column: 3 !important;
    grid-row: 1 !important;
    justify-self: start;
    translate: 0 0;
    text-align: left;
  }

  #level-basic .duo-path-container .path-row.row-right .path-node-summary,
  #level-intermediate .duo-path-container .path-row.row-right .path-node-summary,
  #level-advanced .duo-path-container .path-row.row-right .path-node-summary {
    grid-column: 1 !important;
    grid-row: 1 !important;
    justify-self: end;
    translate: 0 0;
    text-align: right;
  }

  #level-basic .duo-path-container .path-row .path-node-summary {
    width: min(190px, 100%);
  }
}

@media (max-width: 390px) {
  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) {
    grid-template-columns: minmax(0, 1fr) 78px minmax(0, 1fr) !important;
    min-height: 104px !important;
  }

  #level-basic .duo-path-container .geo-node,
  #level-intermediate .duo-path-container .geo-node,
  #level-advanced .duo-path-container .geo-node { width: 74px; height: 74px; }

  #level-basic .duo-path-container .geo-node .geo-shape,
  #level-intermediate .duo-path-container .geo-node .geo-shape,
  #level-advanced .duo-path-container .geo-node .geo-shape { width: 50px; height: 50px; }

  #level-basic .duo-path-container .path-node-summary,
  #level-intermediate .duo-path-container .path-node-summary,
  #level-advanced .duo-path-container .path-node-summary { font-size: .72rem; }
}

/* ==========================================================================
   SHARED PATH CONTRACT - all three levels use the same route geometry
   ========================================================================== */

#level-basic .path-route-svg,
#level-intermediate .path-route-svg,
#level-advanced .path-route-svg {
  display: block !important;
  z-index: 1;
}

/* The SVG is the single connector system. Remove the legacy straight rail so
   no level receives a second, misaligned connector underneath it. */
#level-basic .path-center-line,
#level-intermediate .path-center-line,
#level-advanced .path-center-line { display: none !important; }

#level-basic .duo-path-container .path-row:has(.geo-node),
#level-intermediate .duo-path-container .path-row:has(.geo-node),
#level-advanced .duo-path-container .path-row:has(.geo-node) {
  grid-template-columns: minmax(0, 1fr) 104px minmax(0, 1fr) !important;
  min-height: 132px !important;
  margin-block: 10px;
}

#level-basic .duo-path-container .geo-node,
#level-intermediate .duo-path-container .geo-node,
#level-advanced .duo-path-container .geo-node {
  width: 92px !important;
  height: 92px !important;
  transform: none;
}

#level-basic .duo-path-container .geo-node .geo-shape,
#level-intermediate .duo-path-container .geo-node .geo-shape,
#level-advanced .duo-path-container .geo-node .geo-shape {
  width: 62px !important;
  height: 62px !important;
}

#level-basic .duo-path-container .path-row.row-left .path-marker-col,
#level-intermediate .duo-path-container .path-row.row-left .path-marker-col,
#level-advanced .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-46px) !important; }

#level-basic .duo-path-container .path-row.row-right .path-marker-col,
#level-intermediate .duo-path-container .path-row.row-right .path-marker-col,
#level-advanced .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(46px) !important; }

#level-basic .path-route-line,
#level-intermediate .path-route-line,
#level-advanced .path-route-line { stroke-width: 4; stroke-dasharray: 5 12; }

#level-basic .path-route-underlay,
#level-intermediate .path-route-underlay,
#level-advanced .path-route-underlay { stroke-width: 12; opacity: .46; }

@media (max-width: 760px) {
  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) {
    grid-template-columns: minmax(0, 1fr) 92px minmax(0, 1fr) !important;
    min-height: 124px !important;
    margin-block: 8px;
  }

  #level-basic .duo-path-container .geo-node,
  #level-intermediate .duo-path-container .geo-node,
  #level-advanced .duo-path-container .geo-node {
    width: 84px !important;
    height: 84px !important;
  }

  #level-basic .duo-path-container .geo-node .geo-shape,
  #level-intermediate .duo-path-container .geo-node .geo-shape,
  #level-advanced .duo-path-container .geo-node .geo-shape {
    width: 58px !important;
    height: 58px !important;
  }

  #level-basic .duo-path-container .path-row.row-left .path-marker-col,
  #level-intermediate .duo-path-container .path-row.row-left .path-marker-col,
  #level-advanced .duo-path-container .path-row.row-left .path-marker-col { transform: translateX(-34px) !important; }

  #level-basic .duo-path-container .path-row.row-right .path-marker-col,
  #level-intermediate .duo-path-container .path-row.row-right .path-marker-col,
  #level-advanced .duo-path-container .path-row.row-right .path-marker-col { transform: translateX(34px) !important; }
}

@media (max-width: 390px) {
  #level-basic .duo-path-container .path-row:has(.geo-node),
  #level-intermediate .duo-path-container .path-row:has(.geo-node),
  #level-advanced .duo-path-container .path-row:has(.geo-node) { grid-template-columns: minmax(0, 1fr) 84px minmax(0, 1fr) !important; }
}

/* Cache-safe visibility guard: the active route must never collapse to only
   its progress header on a narrow viewport. */
#level-basic.active .duo-path-container .path-row:not(.subtab-hidden),
#level-intermediate.active .duo-path-container .path-row:not(.subtab-hidden),
#level-advanced.active .duo-path-container .path-row:not(.subtab-hidden) {
  display: grid !important;
  visibility: visible !important;
  opacity: 1 !important;
}

#level-basic.active .duo-path-container .geo-node,
#level-intermediate.active .duo-path-container .geo-node,
#level-advanced.active .duo-path-container .geo-node {
  display: grid !important;
  visibility: visible !important;
}

/* Legacy route header: the route must begin with the first lesson. */
#level-basic .duo-path-container .path-map-head,
#level-intermediate .duo-path-container .path-map-head,
#level-advanced .duo-path-container .path-map-head {
  display: none !important;
  height: 0 !important;
  min-height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* ==========================================================================
   MARBLE + GLASS SURFACES - visual simplification pass
   ========================================================================== */

#level-basic,
#level-intermediate,
#level-advanced {
  background-color: var(--level-canvas);
  background-image:
    radial-gradient(ellipse at 18% 8%, rgba(var(--level-accent-rgb), .2), transparent 30%),
    radial-gradient(ellipse at 84% 26%, rgba(var(--level-accent-rgb), .12), transparent 28%),
    radial-gradient(ellipse at 40% 88%, rgba(255,255,255,.72), transparent 38%),
    linear-gradient(120deg, rgba(255,255,255,.2), transparent 36%, rgba(var(--level-accent-rgb), .07) 62%, rgba(255,255,255,.28));
}

body.dark #level-basic,
body.dark #level-intermediate,
body.dark #level-advanced {
  background-color: var(--level-canvas);
  background-image:
    radial-gradient(ellipse at 18% 8%, rgba(var(--level-accent-rgb), .2), transparent 30%),
    radial-gradient(ellipse at 84% 26%, rgba(var(--level-accent-rgb), .12), transparent 28%),
    radial-gradient(ellipse at 40% 88%, rgba(255,255,255,.04), transparent 38%),
    linear-gradient(120deg, rgba(255,255,255,.035), transparent 36%, rgba(var(--level-accent-rgb), .07) 62%, rgba(255,255,255,.025));
}

/* One calm marble sheet instead of repeated image panels. */
#level-basic .duo-path-container,
#level-intermediate .duo-path-container,
#level-advanced .duo-path-container {
  background-color: rgba(255,255,255,.25);
  background-image:
    radial-gradient(ellipse at 12% 8%, rgba(var(--level-accent-rgb), .12), transparent 28%),
    radial-gradient(ellipse at 88% 36%, rgba(255,255,255,.46), transparent 25%),
    radial-gradient(ellipse at 24% 76%, rgba(var(--level-accent-rgb), .08), transparent 30%),
    repeating-linear-gradient(128deg, transparent 0 86px, rgba(var(--level-accent-rgb), .035) 90px, transparent 98px 170px);
}

body.dark #level-basic .duo-path-container,
body.dark #level-intermediate .duo-path-container,
body.dark #level-advanced .duo-path-container {
  background-color: rgba(10, 18, 30, .5);
  background-image:
    radial-gradient(ellipse at 12% 8%, rgba(var(--level-accent-rgb), .16), transparent 28%),
    radial-gradient(ellipse at 88% 36%, rgba(255,255,255,.05), transparent 25%),
    radial-gradient(ellipse at 24% 76%, rgba(var(--level-accent-rgb), .08), transparent 30%),
    repeating-linear-gradient(128deg, transparent 0 86px, rgba(var(--level-accent-rgb), .035) 90px, transparent 98px 170px);
}

/* Remove the old reef population from the visual layer. arrecife.js can keep
   its hooks, but none of its decorative children should compete with the HUD. */
#level-basic .reef-tramo,
#level-basic .reef-tortuga-libre,
#level-basic .reef-pez,
#level-basic .reef-deco,
#level-basic .burbujas-capa,
#level-basic .ruta-cofre { display: none !important; }

/* Information cards become translucent, readable glass surfaces. */
#level-basic .path-node-summary,
#level-intermediate .path-node-summary,
#level-advanced .path-node-summary,
#level-basic .unit-card,
#level-intermediate .unit-card,
#level-advanced .unit-card,
#level-basic .path-unit-break,
#level-intermediate .path-unit-break,
#level-advanced .path-unit-break {
  border: 1px solid rgba(255,255,255,.58);
  background: linear-gradient(135deg, rgba(255,255,255,.66), rgba(255,255,255,.32));
  box-shadow: 0 16px 34px rgba(22, 35, 53, .09), inset 0 1px 0 rgba(255,255,255,.7);
  backdrop-filter: blur(18px) saturate(125%);
  -webkit-backdrop-filter: blur(18px) saturate(125%);
}

body.dark #level-basic .path-node-summary,
body.dark #level-intermediate .path-node-summary,
body.dark #level-advanced .path-node-summary,
body.dark #level-basic .unit-card,
body.dark #level-intermediate .unit-card,
body.dark #level-advanced .unit-card,
body.dark #level-basic .path-unit-break,
body.dark #level-intermediate .path-unit-break,
body.dark #level-advanced .path-unit-break {
  border-color: rgba(255,255,255,.12);
  background: linear-gradient(135deg, rgba(24, 36, 53, .72), rgba(14, 24, 39, .5));
  box-shadow: 0 18px 38px rgba(0,0,0,.2), inset 0 1px 0 rgba(255,255,255,.08);
}

@media (prefers-reduced-transparency: reduce) {
  #level-basic .path-node-summary,
  #level-intermediate .path-node-summary,
  #level-advanced .path-node-summary,
  #level-basic .unit-card,
  #level-intermediate .unit-card,
  #level-advanced .unit-card { backdrop-filter: none; -webkit-backdrop-filter: none; }
}