/* ============================================================
   Guardianes del Holoceno — modo oscuro por defecto.
   Acentos de la cartilla UdeA: verde vivo, naranja tierra, ocre.
   ============================================================ */
:root {
  /* Tema oscuro (por defecto) */
  --fondo: #0d1b29;
  --superficie: #15293c;
  --superficie-alt: #0f2133;
  --texto: #e9e4d6;
  --texto-suave: #9fadb8;
  --titulo: #f2ecdc;
  --borde: rgba(142, 197, 242, 0.22);
  --azul: #4f96d8;
  --azul-claro: #8ec5f2;
  --azul-noche: #081523;
  --verde: #6fae62;
  --verde-vivo: #88c178;
  --naranja: #e76f51;
  --ocre: #e9c46a;
  --rojo: #ff8d75;
  --sombra: rgba(0, 0, 0, 0.45);
  --display: "Fraunces", Georgia, serif;
  --cuerpo: "Karla", "Helvetica Neue", sans-serif;
}

body.tema-claro {
  --fondo: #f3efe4;
  --superficie: #fffdf7;
  --superficie-alt: #ece7d8;
  --texto: #20303c;
  --texto-suave: #56636e;
  --titulo: #0d2b45;
  --borde: rgba(28, 93, 153, 0.28);
  --azul: #1c5d99;
  --azul-claro: #1c5d99;
  --azul-noche: #0d2b45;
  --verde: #588157;
  --verde-vivo: #588157;
  --rojo: #c1442e;
  --sombra: rgba(13, 43, 69, 0.15);
}

/* Grado de degradación del planeta: 0 = sano, 1 = colapso. */
@property --deg {
  syntax: "<number>";
  inherits: true;
  initial-value: 0.34;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--cuerpo);
  background: var(--fondo);
  color: var(--texto);
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color 0.4s ease, color 0.4s ease;
}

.grano {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='r'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23r)'/%3E%3C/svg%3E");
}

/* Botón flotante de tema */
.boton-tema {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 60;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 50%;
  border: 2px solid var(--borde);
  background: var(--superficie);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 6px 18px var(--sombra);
  transition: transform 0.15s ease;
}
.boton-tema:hover { transform: scale(1.12) rotate(15deg); }

/* ============================== PLANETA ============================== */
.planeta {
  --talla: min(40vh, 26vw, 360px);
  position: relative;
  width: var(--talla);
  height: var(--talla);
  border-radius: 50%;
  overflow: hidden;
  transition: --deg 1.8s ease;
  box-shadow:
    inset -28px -22px 60px rgba(5, 18, 32, 0.65),
    inset 10px 10px 30px rgba(255, 255, 255, 0.22),
    0 0 0 6px rgba(142, 197, 242, 0.08),
    0 0 70px color-mix(in srgb,
      rgba(121, 176, 106, 0.6) calc((1 - var(--deg)) * 100%),
      rgba(193, 68, 46, 0.75));
}

.planeta > div { position: absolute; inset: 0; }

.planeta-oceano {
  background: radial-gradient(circle at 38% 32%,
    #5cb6e8 0%, #2f86c4 40%, #15568f 74%, #0a3158 100%);
  filter: saturate(calc(1.1 - var(--deg) * 0.85))
          brightness(calc(1.02 - var(--deg) * 0.42));
}

/* Capas giratorias: el doble de anchas con la textura repetida dos veces.
   Giran con transform (compuesto en GPU, sin repintar) en vez de
   background-position, lo que evita el tironeo aun con filtros y feTurbulence. */
.planeta > .planeta-continentes,
.planeta > .planeta-nubes {
  top: 0;
  left: 0;
  right: auto;
  bottom: 0;
  width: 400%;                      /* dos copias del mapa, cada una a 2× el ancho del planeta */
  height: 100%;
  background-repeat: repeat-x;
  background-size: 50% 100%;        /* cada copia = 2× planeta => se ve medio mundo (como esfera) */
  will-change: transform;
  backface-visibility: hidden;
}

.planeta-continentes {
  background-image: url("../img/continentes.svg");
  animation: girar 75s linear infinite;
  filter: sepia(calc(var(--deg) * 0.9))
          saturate(calc(1.2 - var(--deg) * 1.0))
          hue-rotate(calc(var(--deg) * -38deg))
          brightness(calc(1.05 - var(--deg) * 0.52));
}

.planeta-nubes {
  background-image: url("../img/nubes.svg");
  animation: girar 48s linear infinite;
  opacity: calc(0.9 - var(--deg) * 0.78);
}

@keyframes girar {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.planeta-smog {
  background:
    radial-gradient(ellipse 42% 18% at 30% 38%, rgba(96, 82, 62, 0.95), transparent 70%),
    radial-gradient(ellipse 50% 22% at 72% 60%, rgba(74, 67, 56, 0.9), transparent 70%),
    radial-gradient(ellipse 38% 16% at 55% 25%, rgba(110, 92, 68, 0.85), transparent 70%),
    radial-gradient(ellipse 60% 26% at 45% 80%, rgba(62, 57, 50, 0.8), transparent 72%);
  opacity: clamp(0, calc((var(--deg) - 0.15) * 1.4), 0.95);
}

.planeta-sombra {
  background: linear-gradient(105deg, transparent 52%, rgba(5, 18, 32, 0.6) 88%);
}
.planeta-brillo {
  background: radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.35), transparent 42%);
  mix-blend-mode: screen;
}

@keyframes pulso-dano {
  0% { transform: scale(1); } 30% { transform: scale(0.98); }
  60% { transform: scale(1.012); } 100% { transform: scale(1); }
}
.planeta.pulso { animation: pulso-dano 0.9s ease; }

/* Destello al decidir: rojo si dañas al planeta, verde si lo sanas */
.planeta-flash { opacity: 0; pointer-events: none; }
.planeta.dano .planeta-flash {
  background: radial-gradient(circle, transparent 30%, rgba(225, 62, 40, 0.6) 100%);
  animation: destello 1.3s ease both;
}
.planeta.sana .planeta-flash {
  background: radial-gradient(circle, transparent 30%, rgba(124, 210, 110, 0.55) 100%);
  animation: destello 1.3s ease both;
}
@keyframes destello {
  0% { opacity: 0; } 25% { opacity: 1; } 100% { opacity: 0; }
}

/* ============================== PORTADA ============================== */
.pagina-inicio {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse 80% 60% at 85% 10%, rgba(79, 150, 216, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 10% 90%, rgba(121, 176, 106, 0.1), transparent 60%),
    var(--fondo);
}

.portada {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 2rem 0;
}

.sello {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--azul-claro);
  border: 2px solid var(--azul-claro);
  border-radius: 999px;
  padding: 0.28rem 0.85rem;
  margin-bottom: 1rem;
}

.titulo-gigante {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.2rem, 4.6vw, 3.8rem);
  line-height: 1.02;
  color: var(--titulo);
  margin-bottom: 1rem;
}
.titulo-gigante em { font-style: italic; color: var(--verde-vivo); }

.bajada {
  font-size: clamp(0.92rem, 1.3vw, 1.05rem);
  color: var(--texto-suave);
  max-width: 34rem;
  margin-bottom: 1.4rem;
}
.bajada strong { color: var(--naranja); }

.acciones { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

.boton {
  font-family: var(--cuerpo);
  font-weight: 700;
  font-size: 0.98rem;
  border-radius: 14px;
  padding: 0.8rem 1.6rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.boton:hover { transform: translateY(-2px); }
.boton:active { transform: translateY(0); }

.boton-principal {
  background: var(--naranja);
  color: #fff;
  border: none;
  box-shadow: 0 6px 0 #b8543c;
}
.boton-principal:hover { box-shadow: 0 8px 0 #b8543c; }
.boton-principal:active { box-shadow: 0 3px 0 #b8543c; }

.boton-secundario {
  background: transparent;
  color: var(--azul-claro);
  border: 2px solid var(--azul-claro);
}

.claves {
  display: flex;
  gap: 1.8rem;
  list-style: none;
  margin-top: 1.8rem;
  flex-wrap: wrap;
}
.claves li { font-size: 0.82rem; color: var(--texto-suave); max-width: 8.5rem; }
.claves span {
  display: block;
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.9rem;
  color: var(--verde-vivo);
  line-height: 1;
}

.portada-planeta { text-align: center; }
.portada-planeta .planeta { margin: 0 auto; --talla: min(38vh, 28vw, 330px); }
.leyenda-planeta {
  margin-top: 1.1rem;
  font-style: italic;
  color: var(--texto-suave);
  font-size: 0.9rem;
}

.pie {
  text-align: center;
  font-size: 0.72rem;
  color: var(--texto-suave);
  padding: 0.7rem 2rem 0.9rem;
  opacity: 0.85;
}

/* ============================== JUEGO ============================== */
.pagina-juego {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--fondo);
}

.barra {
  flex: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  padding: 0.7rem 1.6rem;
  background: var(--azul-noche);
  color: #fff;
  z-index: 20;
}
.marca {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  text-decoration: none;
}
.enlace-creditos {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.65);
  font-family: var(--cuerpo);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.4);
  padding: 0 0 1px;
  margin-right: auto;
}
.enlace-creditos:hover { color: var(--ocre); border-color: var(--ocre); }

.barra-datos { display: flex; gap: 1.6rem; align-items: center; flex-wrap: wrap; }
.dato-etiqueta {
  display: block;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  opacity: 0.75;
}
.dato-valor { font-family: var(--display); font-weight: 800; font-size: 1.3rem; color: var(--ocre); }

.medidor-pista {
  width: 120px;
  height: 11px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
  margin-top: 0.22rem;
}
.medidor-relleno {
  height: 100%;
  border-radius: 99px;
  transition: width 1.2s ease, background-color 1.2s ease;
}
.medidor-relleno.salud { background: var(--verde-vivo); width: 50%; }
.medidor-relleno.bienestar { background: var(--ocre); width: 55%; }

/* Tablero: tres columnas, todo visible sin scroll */
.tablero {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(220px, 0.78fr) minmax(230px, 0.72fr) minmax(340px, 1.05fr);
  gap: clamp(2.2rem, 4.5vw, 4.5rem);
  width: 100%;
  max-width: 1340px;
  margin: 0 auto;
  padding: 1.2rem 2.2rem 1.4rem;
  align-items: stretch;
  overflow: hidden;
}

.zona-planeta {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 0;
}
.zona-planeta .planeta { --talla: min(36vh, 21vw, 310px); }

.estado-planeta {
  margin-top: 0.9rem;
  font-style: italic;
  color: var(--texto-suave);
  max-width: 22rem;
  font-size: 0.85rem;
  min-height: 2.6em;
}

.pista-planeta {
  margin-top: 0.5rem;
  font-size: 0.72rem;
  color: var(--texto-suave);
  opacity: 0.85;
  max-width: 21rem;
}
.pista-planeta strong { color: var(--ocre); font-weight: 700; }

/* Diagrama radial: flota libre, sin caja */
.zona-diagrama {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
}
.subtitulo {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--titulo);
  margin-bottom: 0.3rem;
}
#diagrama {
  width: 100%;
  max-width: min(42vh, 300px);
  height: auto;
  overflow: visible; /* las etiquetas exteriores no se recortan */
  margin: 0.3rem 0;
}
#diagrama path.cuna { cursor: pointer; transition: opacity 0.2s; }
#diagrama path.cuna:hover { opacity: 0.75; }
#diagrama text.etiqueta { fill: var(--texto-suave); }
#diagrama circle.frontera { stroke: var(--texto); }
#diagrama circle.nucleo { fill: var(--azul); }
.pista-diagrama {
  font-size: 0.7rem;
  color: var(--texto-suave);
  margin-top: 0.4rem;
  text-align: center;
  max-width: 21rem;
}

/* Ficha informativa: flota sobre el diagrama, clic para cerrar */
.info-limite {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 6;
  cursor: pointer;
  text-align: left;
  background: var(--superficie);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  border-left: 5px solid var(--azul);
  box-shadow: 0 10px 28px var(--sombra);
  animation: aparecer 0.3s ease both;
}
.info-limite h3 { font-family: var(--display); font-size: 0.92rem; color: var(--titulo); }
.info-limite p { font-size: 0.78rem; color: var(--texto-suave); margin-top: 0.25rem; }
.info-limite .referencia { font-size: 0.68rem; font-style: italic; opacity: 0.8; }
.info-limite::after {
  content: "✕";
  position: absolute;
  top: 0.5rem;
  right: 0.7rem;
  font-size: 0.7rem;
  color: var(--texto-suave);
}

/* Tarjetas de decisión */
.zona-tarjeta {
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-right: 0.2rem;
}

.tarjeta {
  background: var(--superficie);
  border-radius: 22px;
  padding: 1.4rem 1.6rem 1.6rem;
  box-shadow: 0 14px 36px var(--sombra);
  border-top: 7px solid var(--naranja);
  animation: aparecer 0.5s ease both;
}

@keyframes aparecer {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.tarjeta-tipo {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--naranja);
  margin-bottom: 0.4rem;
}
.tarjeta.es-quiz { border-top-color: var(--verde-vivo); }
.tarjeta.es-quiz .tarjeta-tipo { color: var(--verde-vivo); }

.tarjeta-titulo {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.15rem, 1.9vw, 1.5rem);
  color: var(--titulo);
  margin-bottom: 0.5rem;
  line-height: 1.15;
}
.tarjeta-contexto {
  color: var(--texto-suave);
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

.opciones { display: grid; gap: 0.65rem; }
.opcion {
  text-align: left;
  font-family: var(--cuerpo);
  font-size: 0.89rem;
  font-weight: 500;
  background: var(--superficie-alt);
  color: var(--texto);
  border: 2px solid var(--borde);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
.opcion:hover {
  border-color: var(--azul-claro);
  transform: translateX(4px);
}
.opcion:disabled { opacity: 0.5; cursor: wait; }

.tarjeta-feedback { border-top-color: var(--azul); }
.tarjeta-feedback .tarjeta-tipo { color: var(--azul-claro); }
.feedback-texto { font-size: 0.95rem; margin-bottom: 1rem; }

.cambios { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 1.1rem; }
.ficha {
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  background: var(--superficie-alt);
}
.ficha.sube { background: rgba(193, 68, 46, 0.22); color: var(--rojo); }
.ficha.baja { background: rgba(121, 176, 106, 0.2); color: var(--verde-vivo); }

.tarjeta-final { border-top-color: var(--ocre); text-align: center; }
.tarjeta-final .acciones { justify-content: center; margin-top: 1.2rem; }

.oculto { display: none !important; }

/* ============================== CRÉDITOS RODANTES ============================== */
/* Pantalla completa estilo fin de videojuego: espacio, estrellas,
   el planeta asomando y el texto que rueda de abajo hacia arriba. */
.modal-creditos {
  position: fixed;
  inset: 0;
  margin: 0;
  width: 100vw;
  height: 100vh;
  max-width: none;
  max-height: none;
  border: none;
  border-radius: 0;
  padding: 0;
  background: radial-gradient(ellipse 120% 90% at 50% 110%, #0c2740 0%, #071525 45%, #02080f 100%);
  color: #e9e4d6;
  overflow: hidden;
}
.modal-creditos[open] { animation: fundido 0.6s ease both; }
@keyframes fundido { from { opacity: 0; } to { opacity: 1; } }
.modal-creditos::backdrop { background: #000; }

/* Cielo estrellado en dos capas con titileo */
.creditos-estrellas,
.creditos-estrellas::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, #fff, transparent),
    radial-gradient(1px 1px at 34% 64%, #cfe4ff, transparent),
    radial-gradient(1.8px 1.8px at 58% 14%, #fff, transparent),
    radial-gradient(1px 1px at 72% 48%, #ffe9b8, transparent),
    radial-gradient(1.4px 1.4px at 88% 30%, #fff, transparent),
    radial-gradient(1px 1px at 22% 84%, #cfe4ff, transparent),
    radial-gradient(1.6px 1.6px at 46% 38%, #fff, transparent),
    radial-gradient(1px 1px at 64% 78%, #fff, transparent),
    radial-gradient(1.3px 1.3px at 80% 88%, #ffe9b8, transparent),
    radial-gradient(1px 1px at 5% 52%, #fff, transparent);
  animation: titilar 5s ease-in-out infinite alternate;
}
.creditos-estrellas::after {
  transform: translate(28px, 40px) scale(1.4);
  animation-delay: 2.4s;
  opacity: 0.6;
}
@keyframes titilar { from { opacity: 0.45; } to { opacity: 1; } }

/* El planeta asoma desde abajo, como visto desde órbita */
.creditos-planeta {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 58%);
  opacity: 0.85;
  filter: saturate(0.9);
  pointer-events: none;
}
.creditos-planeta .planeta { --talla: min(70vh, 60vw); }
/* En los créditos el planeta no cambia de salud: el smog y el destello no
   aplican, pero las nubes sí se conservan (ahora son baratas con transform). */
.creditos-planeta .planeta-smog,
.creditos-planeta .planeta-flash { display: none; }

/* El rodillo de texto */
.creditos-rollo {
  position: absolute;
  left: 50%;
  width: min(92vw, 660px);
  text-align: center;
  z-index: 5;
  cursor: pointer;
  animation: rodar 46s linear infinite;
  will-change: transform;        /* capa propia de GPU: scroll fluido */
  transform: translateZ(0);
  backface-visibility: hidden;
}
@keyframes rodar {
  from { transform: translate(-50%, 100vh); }
  to   { transform: translate(-50%, -100%); }
}
.creditos-rollo:hover,
.creditos-rollo.pausado { animation-play-state: paused; }

.creditos-titulo {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.05;
  color: #f2ecdc;
  text-shadow: 0 0 30px rgba(233, 196, 106, 0.35);
}
.creditos-sub {
  font-size: 0.85rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--ocre);
  margin: 0.8rem 0 1rem;
}

.rol {
  margin-top: 3.2rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ocre);
  opacity: 0.9;
}
.nombre {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  color: #f2ecdc;
  margin-top: 0.45rem;
}
.nombre-sec {
  font-size: 0.95rem;
  color: #b9c4cd;
  margin-top: 0.5rem;
  line-height: 1.65;
}

.creditos-refs {
  list-style: none;
  margin-top: 0.9rem;
}
.creditos-refs li {
  font-size: 0.82rem;
  color: #93a2ad;
  padding: 0.32rem 0;
  line-height: 1.5;
}
.creditos-refs em { color: #b9c4cd; }

.creditos-coda {
  font-style: italic;
  color: #b9c4cd;
  margin-top: 0.9rem;
  font-size: 0.95rem;
}
.creditos-fin {
  font-family: var(--display);
  font-weight: 800;
  font-size: 2.4rem;
  letter-spacing: 0.4em;
  color: var(--ocre);
  margin: 5rem 0 30vh;
  text-shadow: 0 0 26px rgba(233, 196, 106, 0.45);
}

.modal-cerrar {
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  z-index: 10;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.modal-cerrar:hover { background: var(--naranja); transform: rotate(90deg); }

.creditos-ayuda {
  position: absolute;
  bottom: 0.9rem;
  left: 0;
  right: 0;
  z-index: 10;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(233, 228, 214, 0.45);
  pointer-events: none;
}

/* ============================== RESPONSIVE ============================== */
@media (max-width: 980px) {
  .pagina-inicio, .pagina-juego { height: auto; overflow: auto; }
  .portada { grid-template-columns: 1fr; text-align: center; padding-top: 2.5rem; }
  .portada-texto { order: 2; }
  .portada-planeta { order: 1; }
  .bajada, .claves, .acciones { margin-left: auto; margin-right: auto; justify-content: center; }
  .tablero { grid-template-columns: 1fr; overflow: visible; }
  .zona-planeta .planeta, .portada-planeta .planeta { --talla: min(60vw, 320px); }
  .zona-tarjeta { overflow-y: visible; }
}

@media (prefers-reduced-motion: reduce) {
  .planeta-continentes, .planeta-nubes { animation: none; }
}

/* ============================================================
   Registro del estudiante (actividad del curso)
   ============================================================ */
.registro {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
}
.registro-tarjeta {
  width: min(560px, 100%);
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: 20px;
  padding: clamp(1.6rem, 4vw, 2.6rem);
  box-shadow: 0 24px 60px -30px var(--sombra);
}
.registro-titulo {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  color: var(--titulo);
  line-height: 1.1;
  margin: 0.6rem 0 0.5rem;
}
.registro-intro {
  color: var(--texto-suave);
  margin-bottom: 1.4rem;
}
.registro-error {
  background: color-mix(in srgb, var(--naranja) 18%, transparent);
  border: 1px solid var(--naranja);
  color: var(--rojo);
  padding: 0.6rem 0.85rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  font-weight: 500;
}
.registro-form { display: flex; flex-direction: column; gap: 1rem; }
.campo { display: flex; flex-direction: column; gap: 0.35rem; }
.campo-fila { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.campo-etiqueta {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--texto);
}
.campo-etiqueta em { color: var(--naranja); font-style: normal; }
.campo-entrada {
  font-family: var(--cuerpo);
  font-size: 1rem;
  color: var(--texto);
  background: var(--superficie-alt);
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.campo-entrada::placeholder { color: var(--texto-suave); opacity: 0.7; }
.campo-entrada:focus {
  outline: none;
  border-color: var(--azul-claro);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--azul) 30%, transparent);
}
.registro-form .boton { margin-top: 0.4rem; }
.registro-privacidad {
  margin-top: 1.3rem;
  font-size: 0.8rem;
  color: var(--texto-suave);
  line-height: 1.45;
}

@media (max-width: 420px) {
  .campo-fila { grid-template-columns: 1fr; }
}
.registro-tarjeta-angosta { width: min(420px, 100%); }
.enlace-volver { color: var(--azul-claro); text-decoration: none; }
.enlace-volver:hover { text-decoration: underline; }

/* ============================================================
   Panel docente
   ============================================================ */
.panel {
  width: min(880px, 100%);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
.panel-cabecera {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.6rem;
  flex-wrap: wrap;
}
.panel-titulo {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--titulo);
  line-height: 1.1;
}
.panel-tarjeta {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: 18px;
  padding: clamp(1.3rem, 3vw, 2rem);
  margin-bottom: 1.4rem;
  box-shadow: 0 20px 50px -34px var(--sombra);
}
.panel-subtitulo {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--titulo);
  margin-bottom: 0.8rem;
}
.panel-aviso code {
  background: var(--superficie-alt);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
  font-size: 0.9em;
}
.panel-semestre {
  font-family: var(--display);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--verde-vivo);
  line-height: 1.1;
}
.panel-estado-prueba { color: var(--texto-suave); margin: 0.5rem 0 1.2rem; }
.etiqueta {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.85rem;
}
.etiqueta-1 { background: color-mix(in srgb, var(--verde) 22%, transparent); color: var(--verde-vivo); }
.etiqueta-2 { background: color-mix(in srgb, var(--ocre) 25%, transparent); color: var(--ocre); }
.etiqueta-0 { background: color-mix(in srgb, var(--texto-suave) 20%, transparent); color: var(--texto-suave); }
.panel-metricas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.4rem;
}
.metrica {
  background: var(--superficie-alt);
  border: 1px solid var(--borde);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
}
.metrica-n {
  display: block;
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--titulo);
}
.metrica-t { font-size: 0.82rem; color: var(--texto-suave); }
.panel-controles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1rem;
}
.panel-controles .boton[disabled] { opacity: 0.45; cursor: not-allowed; }
.panel-ayuda { font-size: 0.88rem; color: var(--texto-suave); line-height: 1.5; }
.panel-nuevo { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 0.9rem; }
.panel-nuevo .campo-entrada { flex: 1 1 220px; }

/* ============================================================
   Comparativo del estudiante (Prueba 1 vs Prueba 2)
   ============================================================ */
.comp-intro { color: var(--texto-suave); margin-bottom: 1.4rem; max-width: 60ch; }
.comp-resumen {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.2rem;
  align-items: center;
}
.comp-col { text-align: center; }
.comp-col-final .comp-desenlace { color: var(--titulo); }
.comp-etapa {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--texto-suave);
}
.comp-desenlace {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--texto);
  margin: 0.3rem 0 1rem;
}
.comp-cifra { margin: 0.5rem 0; }
.comp-n {
  display: block;
  font-family: var(--display);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--titulo);
  line-height: 1;
}
.comp-l { font-size: 0.8rem; color: var(--texto-suave); }
.comp-flecha { font-size: 2rem; color: var(--azul-claro); }
.delta { font-size: 0.78rem; font-weight: 700; white-space: nowrap; }
.delta.mejora { color: var(--verde-vivo); }
.delta.empeora { color: var(--rojo); }
.delta.igual { color: var(--texto-suave); }
.comp-tabla { width: 100%; border-collapse: collapse; margin-top: 0.6rem; }
.comp-tabla th, .comp-tabla td {
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--borde);
  text-align: left;
}
.comp-tabla th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--texto-suave);
}
.comp-tabla td.num, .comp-tabla th:not(:first-child) { text-align: right; }
.comp-cambios { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.comp-cambios li {
  border-left: 3px solid var(--azul);
  padding-left: 0.9rem;
}
.comp-cambio-titulo { font-weight: 700; color: var(--titulo); margin-bottom: 0.3rem; }
.comp-cambio-antes, .comp-cambio-despues { font-size: 0.9rem; color: var(--texto-suave); }
.comp-cambio-antes span { color: var(--rojo); font-weight: 700; }
.comp-cambio-despues span { color: var(--verde-vivo); font-weight: 700; }
.comp-acciones { margin-top: 0.5rem; }

@media (max-width: 560px) {
  .comp-resumen { grid-template-columns: 1fr; }
  .comp-flecha { transform: rotate(90deg); }
}

/* ============================================================
   Estadísticas de la profesora (Chart.js)
   ============================================================ */
.panel-ancho { width: min(1080px, 100%); }
.panel-cabecera-acciones { display: flex; gap: 0.7rem; align-items: center; flex-wrap: wrap; }
.tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}
.tab {
  font-family: var(--cuerpo);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--texto-suave);
  background: var(--superficie-alt);
  border: 1px solid var(--borde);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.tab:hover { color: var(--texto); }
.tab.activo {
  color: var(--azul-noche);
  background: var(--azul-claro);
  border-color: var(--azul-claro);
}
.tab-panel { display: none; }
.tab-panel.activo { display: block; }
.grafico-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.2rem;
}
.grafico {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: 16px;
  padding: 1.1rem 1.2rem 1.3rem;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.15s ease;
}
.grafico:hover { border-color: var(--azul-claro); transform: translateY(-2px); }
.grafico figcaption::after {
  content: "⤢";
  margin-left: auto;
  color: var(--texto-suave);
  font-size: 0.95rem;
}
.grafico-ancho { grid-column: 1 / -1; }
@media (max-width: 640px) {
  .grafico-grid { grid-template-columns: 1fr; }
}

/* Modal para ampliar una gráfica (pensado para proyección en auditorio) */
.modal-grafico {
  /* margin:auto centra el dialog; el reset global lo había anulado. */
  margin: auto;
  width: min(1400px, 95vw);
  max-width: 95vw;
  border: 1px solid var(--borde);
  border-radius: 18px;
  background: var(--superficie);
  color: var(--texto);
  padding: 0;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6);
}
.modal-grafico::backdrop { background: rgba(4, 12, 20, 0.78); }
.modal-grafico-cab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.3rem;
  border-bottom: 1px solid var(--borde);
}
.modal-grafico-cab h3 {
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--titulo);
}
.modal-grafico-cerrar {
  background: none;
  border: none;
  color: var(--texto-suave);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
.modal-grafico-cerrar:hover { color: var(--texto); }
.modal-grafico-lienzo { position: relative; height: min(74vh, 700px); padding: 1.4rem; }

/* Dos Tierras finales en el comparativo */
.comp-planetas {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.4rem;
}
.comp-planeta-col { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 0.6rem; }
.comp-planeta { --talla: min(34vw, 240px); margin: 0 auto; }
.comp-planeta-salud { color: var(--texto-suave); font-size: 0.95rem; }
.comp-planeta-salud strong { color: var(--titulo); font-size: 1.15rem; }
/* Planeta promedio en las pestañas Prueba 1 y Prueba 2 */
.stat-planeta-card { display: flex; justify-content: center; }
.stat-planeta-card .comp-planeta { --talla: min(46vw, 260px); }
@media (max-width: 560px) {
  .comp-planetas { grid-template-columns: 1fr; }
  .comp-planeta { --talla: min(55vw, 220px); }
}

/* Acceso docente: botón discreto y flotante, encima del de tema */
.boton-acceso {
  position: fixed;
  bottom: 4.4rem;
  right: 1rem;
  z-index: 60;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 50%;
  border: 2px solid var(--borde);
  background: var(--superficie);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  text-decoration: none;
  box-shadow: 0 6px 18px var(--sombra);
  transition: transform 0.15s ease;
}
.boton-acceso:hover { transform: scale(1.12) rotate(-15deg); }
.grafico figcaption {
  font-weight: 700;
  color: var(--titulo);
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.lienzo { position: relative; height: 260px; }
.grafico-ancho .lienzo { height: 320px; }
.leyenda-zonas { display: inline-flex; gap: 0.7rem; font-size: 0.72rem; font-weight: 500; color: var(--texto-suave); }
.leyenda-zonas span { display: inline-flex; align-items: center; gap: 0.28rem; }
.leyenda-zonas i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.zona-segura { background: var(--verde-vivo); }
.zona-riesgo { background: var(--ocre); }
.zona-alto { background: var(--rojo); }