/* ===========================================================================
   Lumen Server — sistema de diseño "aula nocturna".
   Mobile-first, flexbox. Sin frameworks. Tema oscuro, ámbar dominante,
   acento cian. Todo el layout fluye con flex; los puntos de corte sólo
   reorganizan columnas en pantallas grandes.
   =========================================================================== */

:root {
  --fondo: #0b1020;
  --fondo-2: #0f1630;
  --superficie: #141d3a;
  --superficie-2: #1b2547;
  --borde: #26315a;
  --borde-suave: #1e2748;
  --texto: #e8ecf8;
  --texto-2: #aab3d0;
  --texto-3: #7c86a8;
  --ambar: #ffcb6b;
  --ambar-2: #ffb347;
  --ambar-suave: rgba(255, 203, 107, .14);
  --cian: #5eead4;
  --cian-suave: rgba(94, 234, 212, .12);
  --violeta: #a78bfa;
  --exito: #4ade80;
  --exito-suave: rgba(74, 222, 128, .14);
  --aviso: #fbbf24;
  --aviso-suave: rgba(251, 191, 36, .14);
  --error: #f87171;
  --error-suave: rgba(248, 113, 113, .14);
  --radio: 16px;
  --radio-sm: 10px;
  --radio-lg: 24px;
  --sombra: 0 10px 40px rgba(0, 0, 0, .45);
  --sombra-suave: 0 4px 18px rgba(0, 0, 0, .3);
  --trans: 220ms cubic-bezier(.4, 0, .2, 1);
  --fuente: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;
  --barra-alto: 60px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--fondo);
  color: var(--texto);
  font-family: var(--fuente);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
a { color: var(--cian); text-decoration: none; }
button { font-family: inherit; }
img, svg { display: block; max-width: 100%; }
code { font-family: var(--mono); font-size: .9em; background: var(--superficie-2); padding: .1em .4em; border-radius: 6px; color: var(--ambar); }

::selection { background: var(--ambar); color: #1a1206; }

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--borde) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--borde); border-radius: 8px; border: 2px solid var(--fondo); }
*::-webkit-scrollbar-thumb:hover { background: var(--superficie-2); }

.oculto { display: none !important; }

/* ----------------------------------------------------------- fondo aurora */
.fondo-aurora {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(60% 50% at 15% 0%, rgba(167, 139, 250, .16), transparent 60%),
    radial-gradient(55% 45% at 90% 10%, rgba(94, 234, 212, .12), transparent 60%),
    radial-gradient(70% 60% at 50% 110%, rgba(255, 179, 71, .12), transparent 60%),
    var(--fondo);
}
.fondo-aurora::after {
  content: ""; position: absolute; inset: 0; opacity: .035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.admin-fondo { opacity: .7; }

/* --------------------------------------------------------- barra superior */
.barra-superior {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  height: var(--barra-alto); padding: 0 clamp(14px, 4vw, 28px);
  background: rgba(11, 16, 32, .82); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--borde-suave);
}
.marca { display: flex; align-items: center; gap: 11px; color: var(--texto); }
.marca-orbe {
  width: 30px; height: 30px; border-radius: 50%; flex: none; position: relative;
  background: radial-gradient(circle at 35% 30%, #fff3d6, var(--ambar) 45%, var(--ambar-2) 75%, #b9772a);
  box-shadow: 0 0 18px rgba(255, 203, 107, .55), inset 0 0 6px rgba(255, 255, 255, .5);
  animation: orbe-latido 4s ease-in-out infinite;
}
.marca-orbe::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%;
  border: 1.5px solid rgba(94, 234, 212, .5); animation: orbe-anillo 4s ease-in-out infinite;
}
.marca-orbe.grande { width: 56px; height: 56px; }
@keyframes orbe-latido { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }
@keyframes orbe-anillo { 0%, 100% { transform: scale(1); opacity: .7; } 50% { transform: scale(1.12); opacity: .3; } }
.marca-texto { display: flex; flex-direction: column; font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; line-height: 1; }
.marca-texto small { font-weight: 500; font-size: .62rem; letter-spacing: .14em; text-transform: uppercase; color: var(--texto-3); margin-top: 3px; }
.barra-acciones { display: flex; align-items: center; gap: 10px; }
.enlace-suave { color: var(--texto-2); font-size: .85rem; padding: 7px 11px; border-radius: var(--radio-sm); transition: var(--trans); white-space: nowrap; }
.enlace-suave:hover { color: var(--texto); background: var(--superficie); }

.boton-icono {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  background: var(--superficie); color: var(--texto-2); border: 1px solid var(--borde);
  padding: 8px 12px; border-radius: var(--radio-sm); font-size: .82rem; transition: var(--trans);
}
.boton-icono:hover { color: var(--texto); border-color: var(--ambar); }
.boton-icono[aria-pressed="false"] { opacity: .55; }
.ico-voz { width: 16px; height: 16px; flex: none; background: currentColor; -webkit-mask: var(--mask-voz) center/contain no-repeat; mask: var(--mask-voz) center/contain no-repeat;
  --mask-voz: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 9v6h4l5 5V4L7 9H3zm13.5 3a4.5 4.5 0 0 0-2.5-4v8a4.5 4.5 0 0 0 2.5-4zM14 3.2v2.1a7 7 0 0 1 0 13.4v2.1a9 9 0 0 0 0-17.6z'/%3E%3C/svg%3E"); }

/* ---------------------------------------------------------------- botones */
.boton {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  cursor: pointer; border: 1px solid var(--borde); background: var(--superficie);
  color: var(--texto); padding: 11px 18px; border-radius: var(--radio-sm);
  font-size: .92rem; font-weight: 600; transition: var(--trans); text-align: center;
}
.boton:hover { border-color: var(--texto-3); transform: translateY(-1px); }
.boton:active { transform: translateY(0); }
.boton:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.boton-primario { background: linear-gradient(135deg, var(--ambar), var(--ambar-2)); color: #241703; border-color: transparent; box-shadow: 0 6px 20px rgba(255, 179, 71, .28); }
.boton-primario:hover { box-shadow: 0 8px 26px rgba(255, 179, 71, .42); border-color: transparent; }
.boton-fantasma { background: transparent; border-color: var(--borde); color: var(--texto-2); }
.boton-fantasma:hover { color: var(--texto); background: var(--superficie); }
.boton-grande { padding: 15px 26px; font-size: 1.02rem; border-radius: var(--radio); }
.boton-peligro { background: var(--error-suave); border-color: rgba(248, 113, 113, .4); color: var(--error); }
.boton-mini { padding: 6px 11px; font-size: .78rem; border-radius: 8px; }

/* ------------------------------------------------------------------- demo */
.demo-contenedor { display: flex; flex-direction: column; max-width: 1180px; margin: 0 auto; padding: clamp(16px, 4vw, 34px); width: 100%; }
.vista-inicio { display: flex; flex-direction: column; gap: 26px; animation: aparecer .5s ease both; }
.hero { display: flex; flex-direction: column; gap: 14px; max-width: 760px; padding: clamp(8px, 3vw, 22px) 0; }
.kicker { font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; color: var(--cian); font-weight: 700; }
.hero-titulo { font-size: clamp(1.9rem, 6vw, 3.1rem); font-weight: 800; letter-spacing: -.03em; }
.grad-texto { background: linear-gradient(120deg, var(--ambar), var(--cian)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { color: var(--texto-2); font-size: clamp(1rem, 2.5vw, 1.15rem); max-width: 620px; }
.nota-demo { color: var(--texto-3); font-size: .82rem; text-align: center; padding: 8px; }

.selector-areas { display: flex; flex-wrap: wrap; gap: 14px; }
.area-tarjeta {
  flex: 1 1 220px; display: flex; flex-direction: column; gap: 10px; cursor: pointer;
  background: linear-gradient(160deg, var(--superficie), var(--fondo-2));
  border: 1px solid var(--borde); border-radius: var(--radio-lg); padding: 22px;
  transition: var(--trans); text-align: left; color: var(--texto); position: relative; overflow: hidden;
}
.area-tarjeta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(80% 60% at 100% 0%, var(--area-tinte, var(--ambar-suave)), transparent 70%); opacity: .8; }
.area-tarjeta:hover { transform: translateY(-4px); border-color: var(--area-borde, var(--ambar)); box-shadow: var(--sombra); }
.area-icono { font-size: 1.9rem; position: relative; }
.area-nombre { font-size: 1.25rem; font-weight: 700; position: relative; }
.area-detalle { color: var(--texto-2); font-size: .86rem; position: relative; }
.area-conteo { position: relative; font-size: .74rem; color: var(--texto-3); font-weight: 600; letter-spacing: .04em; }

.panel-temas { display: flex; flex-direction: column; gap: 18px; animation: aparecer .4s ease both; }
.panel-temas-cab { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.titulo-area { font-size: 1.5rem; }
.lista-temas { display: flex; flex-wrap: wrap; gap: 11px; }
.tema-tarjeta {
  flex: 1 1 160px; cursor: pointer; text-align: left; color: var(--texto);
  background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio);
  padding: 15px 17px; transition: var(--trans); display: flex; flex-direction: column; gap: 5px;
}
.tema-tarjeta:hover { border-color: var(--cian); transform: translateY(-2px); }
.tema-tarjeta.sel { border-color: var(--ambar); background: var(--ambar-suave); box-shadow: 0 0 0 1px var(--ambar); }
.tema-nombre { font-weight: 700; font-size: .98rem; }
.tema-nivel { font-size: .72rem; color: var(--texto-3); text-transform: uppercase; letter-spacing: .06em; }
.arranque-leccion { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding-top: 6px; }
.campo-nivel { display: flex; flex-direction: column; gap: 8px; }
.campo-etq { font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; color: var(--texto-3); font-weight: 700; }
.segmentado { display: inline-flex; background: var(--fondo-2); border: 1px solid var(--borde); border-radius: var(--radio-sm); padding: 3px; gap: 3px; }
.seg { cursor: pointer; border: none; background: transparent; color: var(--texto-2); padding: 8px 15px; border-radius: 8px; font-size: .85rem; font-weight: 600; transition: var(--trans); }
.seg:hover { color: var(--texto); }
.seg.activo { background: var(--ambar); color: #241703; }

/* --------------------------------------------------------------- lección */
.vista-leccion { display: flex; flex-direction: column; gap: 16px; animation: aparecer .4s ease both; width: 100%; }
.leccion-cab { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.leccion-titulo { font-size: 1.3rem; flex: 1; min-width: 120px; }
.pastilla { display: inline-flex; align-items: center; gap: 7px; font-size: .74rem; font-weight: 700; padding: 5px 12px; border-radius: 999px; letter-spacing: .03em; white-space: nowrap; }
.pastilla::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.estado-conectando { background: var(--aviso-suave); color: var(--aviso); }
.estado-conectando::before { animation: parpadeo 1.2s ease-in-out infinite; }
.estado-ok { background: var(--exito-suave); color: var(--exito); }
.estado-error { background: var(--error-suave); color: var(--error); }
.estado-completada { background: var(--cian-suave); color: var(--cian); }
@keyframes parpadeo { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

/* -------------------------------------------------------------- escenario */
.escenario { display: flex; flex-direction: column; gap: 16px; width: 100%; }
.escenario-regiones { display: flex; flex-direction: column; gap: 16px; width: 100%; }
.region-pizarron {
  display: flex; flex-direction: column; gap: 16px; flex: 1; min-width: 0;
  background: linear-gradient(170deg, var(--fondo-2), rgba(15, 22, 48, .5));
  border: 1px solid var(--borde); border-radius: var(--radio-lg); padding: clamp(16px, 3vw, 26px);
  min-height: 320px; position: relative; overflow: hidden;
}
.region-pizarron::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(var(--borde-suave) 1px, transparent 1px), linear-gradient(90deg, var(--borde-suave) 1px, transparent 1px);
  background-size: 34px 34px; mask-image: radial-gradient(80% 80% at 50% 40%, #000, transparent);
}
.region-pizarron > * { position: relative; }
.region-panel { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.pizarron-vacio { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; flex: 1; color: var(--texto-3); text-align: center; padding: 40px 20px; }
.pizarron-vacio .orbe-grande { width: 64px; height: 64px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff3d6, var(--ambar) 50%, #b9772a); box-shadow: 0 0 40px rgba(255, 203, 107, .4); animation: orbe-latido 3s ease-in-out infinite; }

.screen-contenedor { display: flex; flex-direction: column; max-width: 1280px; margin: 0 auto; padding: clamp(14px, 3vw, 26px); width: 100%; }

/* ------------------------------------------------------------- componentes */
.comp { animation: comp-entrar .45s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes comp-entrar { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.comp-resaltar { animation: resaltar 1.4s ease; }
@keyframes resaltar { 0%, 100% { box-shadow: 0 0 0 0 rgba(255, 203, 107, 0); } 30% { box-shadow: 0 0 0 3px var(--ambar), 0 0 30px rgba(255, 203, 107, .4); } }
.comp-anim-pulse { animation: pulso 1.6s ease-in-out infinite; }
@keyframes pulso { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } }

.tarjeta { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 18px 20px; display: flex; flex-direction: column; gap: 10px; }
.tarjeta-titulo { font-size: 1.05rem; font-weight: 700; display: flex; align-items: center; gap: 9px; }
.tarjeta-cuerpo { color: var(--texto-2); font-size: .95rem; }
.panel-comp { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 18px; display: flex; flex-direction: column; gap: 12px; }

/* explicación matemática */
.explica { display: flex; flex-direction: column; gap: 12px; }
.explica-cab { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.explica-titulo { font-size: 1.15rem; font-weight: 700; }
.explica-estrategia { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; padding: 4px 10px; border-radius: 999px; background: var(--cian-suave); color: var(--cian); }
.explica-fuente { font-size: .68rem; color: var(--texto-3); padding: 4px 9px; border-radius: 999px; border: 1px solid var(--borde); }
.explica-fuente.ia { color: var(--violeta); border-color: rgba(167, 139, 250, .4); }
.explica-texto { font-size: clamp(1.02rem, 2.6vw, 1.2rem); line-height: 1.65; color: var(--texto); }
.explica-texto .resaltado { color: var(--ambar); font-weight: 700; }

/* progreso de lección */
.lec-progreso { display: flex; flex-direction: column; gap: 9px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 15px 17px; }
.lec-progreso-cab { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.lec-progreso-tema { font-weight: 700; font-size: .92rem; }
.lec-progreso-paso { font-size: .78rem; color: var(--texto-2); font-weight: 600; }
.lec-progreso-barra { height: 9px; border-radius: 999px; background: var(--fondo-2); overflow: hidden; }
.lec-progreso-relleno { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--ambar), var(--cian)); transition: width .6s cubic-bezier(.2, .8, .2, 1); }
.lec-progreso-pie { display: flex; justify-content: space-between; font-size: .74rem; color: var(--texto-3); }
.lec-progreso-aciertos { color: var(--exito); font-weight: 700; }

/* ejercicio / pregunta */
.ejercicio { display: flex; flex-direction: column; gap: 14px; background: linear-gradient(160deg, var(--superficie), var(--fondo-2)); border: 1px solid var(--ambar); border-radius: var(--radio); padding: 18px 20px; box-shadow: 0 0 0 1px rgba(255, 203, 107, .15), var(--sombra-suave); }
.ejercicio-prompt { font-size: 1.08rem; font-weight: 600; line-height: 1.5; }
.ejercicio-pista { font-size: .82rem; color: var(--texto-3); font-style: italic; }
.ejercicio-opciones { display: flex; flex-direction: column; gap: 9px; }
.opcion {
  cursor: pointer; text-align: left; background: var(--fondo-2); border: 1px solid var(--borde);
  color: var(--texto); padding: 13px 16px; border-radius: var(--radio-sm); font-size: .98rem;
  transition: var(--trans); display: flex; align-items: center; gap: 11px;
}
.opcion:hover { border-color: var(--cian); background: var(--cian-suave); transform: translateX(3px); }
.opcion .opcion-letra { width: 26px; height: 26px; flex: none; border-radius: 50%; background: var(--superficie-2); display: flex; align-items: center; justify-content: center; font-size: .78rem; font-weight: 700; color: var(--texto-2); }
.opcion.elegida { border-color: var(--ambar); background: var(--ambar-suave); }
.ejercicio-entrada { display: flex; gap: 10px; flex-wrap: wrap; }
.ejercicio-entrada input { flex: 1; min-width: 120px; }
.ejercicio-acciones { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.ejercicio-enviado { opacity: .6; pointer-events: none; }

/* alertas / feedback */
.alerta { display: flex; align-items: flex-start; gap: 11px; padding: 13px 16px; border-radius: var(--radio-sm); font-size: .92rem; border: 1px solid; animation: comp-entrar .4s ease both; }
.alerta-icono { flex: none; font-size: 1.1rem; line-height: 1.3; }
.alerta.success { background: var(--exito-suave); border-color: rgba(74, 222, 128, .35); color: #bbf7d0; }
.alerta.warning { background: var(--aviso-suave); border-color: rgba(251, 191, 36, .35); color: #fde68a; }
.alerta.error { background: var(--error-suave); border-color: rgba(248, 113, 113, .35); color: #fecaca; }
.alerta.info { background: var(--cian-suave); border-color: rgba(94, 234, 212, .35); color: #99f6e4; }

/* KPI */
.kpi { display: flex; flex-direction: column; gap: 6px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 18px; }
.kpi-etq { font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--texto-3); font-weight: 700; }
.kpi-valor { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; color: var(--ambar); }
.kpi-delta { font-size: .8rem; font-weight: 600; }
.kpi-delta.up { color: var(--exito); } .kpi-delta.down { color: var(--error); }

/* gráficas */
.grafica { display: flex; flex-direction: column; gap: 12px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 18px; }
.grafica-titulo { font-size: .95rem; font-weight: 700; }
.grafica-lienzo { width: 100%; }
.grafica-lienzo svg { width: 100%; height: auto; }

/* tablas / listas */
.tabla-envoltura { overflow-x: auto; border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie); }
table.lumen-tabla { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 320px; }
.lumen-tabla th { text-align: left; padding: 11px 14px; background: var(--fondo-2); color: var(--texto-2); font-weight: 700; font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; border-bottom: 1px solid var(--borde); }
.lumen-tabla td { padding: 11px 14px; border-bottom: 1px solid var(--borde-suave); color: var(--texto); }
.lumen-tabla tr:last-child td { border-bottom: none; }
.lumen-tabla tr:hover td { background: rgba(255, 255, 255, .02); }
.lista-comp { display: flex; flex-direction: column; gap: 8px; }
.lista-item { display: flex; align-items: center; gap: 11px; padding: 11px 14px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio-sm); font-size: .92rem; }
.lista-item .punto { width: 8px; height: 8px; border-radius: 50%; background: var(--cian); flex: none; }

/* estado / timeline */
.estado-comp { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; font-size: .82rem; font-weight: 600; background: var(--superficie); border: 1px solid var(--borde); }
.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline-item { display: flex; gap: 14px; padding: 4px 0; }
.timeline-eje { display: flex; flex-direction: column; align-items: center; }
.timeline-nodo { width: 13px; height: 13px; border-radius: 50%; background: var(--ambar); flex: none; margin-top: 4px; box-shadow: 0 0 0 4px var(--ambar-suave); }
.timeline-linea { width: 2px; flex: 1; background: var(--borde); min-height: 18px; }
.timeline-cuerpo { padding-bottom: 16px; }
.timeline-titulo { font-weight: 700; font-size: .92rem; }
.timeline-detalle { color: var(--texto-2); font-size: .84rem; }

/* formularios */
.campo { display: flex; flex-direction: column; gap: 7px; }
.campo > span { font-size: .8rem; font-weight: 600; color: var(--texto-2); }
input[type="text"], input[type="password"], input[type="number"], input[type="email"], input[type="search"], input[type="date"], textarea, select {
  width: 100%; background: var(--fondo-2); border: 1px solid var(--borde); color: var(--texto);
  padding: 12px 14px; border-radius: var(--radio-sm); font-size: .95rem; font-family: inherit; transition: var(--trans);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--ambar); box-shadow: 0 0 0 3px var(--ambar-suave); }
textarea { resize: vertical; min-height: 90px; }
select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23aab3d0' stroke-width='2' fill='none'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }
.checkbox-fila, .radio-fila, .switch-fila { display: flex; align-items: center; gap: 10px; cursor: pointer; font-size: .92rem; }
input[type="checkbox"], input[type="radio"] { width: 18px; height: 18px; accent-color: var(--ambar); cursor: pointer; }
.switch { position: relative; width: 44px; height: 24px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-pista { position: absolute; inset: 0; background: var(--borde); border-radius: 999px; transition: var(--trans); cursor: pointer; }
.switch-pista::before { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; background: var(--texto); border-radius: 50%; transition: var(--trans); }
.switch input:checked + .switch-pista { background: var(--ambar); }
.switch input:checked + .switch-pista::before { transform: translateX(20px); background: #241703; }
.slider-fila { display: flex; flex-direction: column; gap: 8px; }
input[type="range"] { width: 100%; accent-color: var(--ambar); cursor: pointer; }

/* progreso genérico */
.progreso { display: flex; flex-direction: column; gap: 8px; }
.progreso-cab { display: flex; justify-content: space-between; font-size: .85rem; }
.progreso-pista { height: 12px; background: var(--fondo-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--borde); }
.progreso-relleno { height: 100%; background: linear-gradient(90deg, var(--ambar), var(--ambar-2)); border-radius: 999px; transition: width .6s ease; }
.progreso-relleno.accent { background: linear-gradient(90deg, var(--cian), #2dd4bf); }
.progreso-relleno.success { background: linear-gradient(90deg, var(--exito), #22c55e); }

/* visualizaciones pedagógicas */
.visual-lienzo { display: flex; flex-direction: column; gap: 10px; align-items: center; background: rgba(11, 16, 32, .4); border: 1px solid var(--borde-suave); border-radius: var(--radio); padding: 18px; }
.visual-lienzo svg { width: 100%; max-width: 460px; height: auto; }
.visual-titulo { font-size: .85rem; color: var(--texto-2); font-weight: 600; align-self: flex-start; }
.fraccion-interactive { cursor: pointer; }
.formula { font-family: var(--mono); font-size: clamp(1.2rem, 4vw, 1.7rem); text-align: center; padding: 18px; background: var(--fondo-2); border-radius: var(--radio); border: 1px solid var(--borde); color: var(--ambar); letter-spacing: .02em; }
.comparacion { display: flex; gap: 14px; flex-wrap: wrap; }
.comparacion-lado { flex: 1 1 200px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.comparacion-etq { font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--cian); font-weight: 700; }
.flashcard { perspective: 1000px; cursor: pointer; min-height: 150px; }
.flashcard-inner { position: relative; width: 100%; min-height: 150px; transition: transform .6s; transform-style: preserve-3d; }
.flashcard.volteada .flashcard-inner { transform: rotateY(180deg); }
.flashcard-cara { position: absolute; inset: 0; backface-visibility: hidden; display: flex; align-items: center; justify-content: center; padding: 22px; border-radius: var(--radio); border: 1px solid var(--borde); text-align: center; }
.flashcard-frente { background: linear-gradient(160deg, var(--superficie), var(--fondo-2)); font-size: 1.3rem; font-weight: 700; }
.flashcard-reverso { background: var(--ambar-suave); border-color: var(--ambar); transform: rotateY(180deg); color: var(--texto); font-size: .98rem; }
.lectura { display: flex; flex-direction: column; gap: 12px; }
.lectura-texto { font-size: 1.05rem; line-height: 1.8; color: var(--texto); }
.word-builder { display: flex; flex-direction: column; gap: 12px; }
.word-banco, word-objetivo { display: flex; flex-wrap: wrap; gap: 8px; }
.word-objetivo { min-height: 48px; padding: 10px; border: 1px dashed var(--borde); border-radius: var(--radio-sm); background: var(--fondo-2); }
.word-ficha { cursor: pointer; padding: 8px 14px; background: var(--superficie-2); border: 1px solid var(--borde); border-radius: 8px; font-size: .92rem; transition: var(--trans); }
.word-ficha:hover { border-color: var(--cian); }

/* simulación */
.simulacion { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.sim-lienzo { width: 100%; max-width: 480px; background: radial-gradient(circle at 50% 40%, #101a38, #0b1020); border-radius: var(--radio); border: 1px solid var(--borde); }
.sim-controles { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }

/* chat / asistente */
.chat { display: flex; flex-direction: column; gap: 10px; }
.chat-mensajes { display: flex; flex-direction: column; gap: 9px; max-height: 320px; overflow-y: auto; padding: 4px; }
.chat-burbuja { max-width: 85%; padding: 10px 14px; border-radius: 14px; font-size: .9rem; line-height: 1.5; }
.chat-burbuja.agente { align-self: flex-start; background: var(--superficie-2); border: 1px solid var(--borde); border-bottom-left-radius: 4px; }
.chat-burbuja.usuario { align-self: flex-end; background: var(--ambar-suave); border: 1px solid rgba(255, 203, 107, .3); border-bottom-right-radius: 4px; }
.chat-entrada { display: flex; gap: 8px; }
.ayuda-contextual { display: flex; gap: 11px; padding: 13px 16px; background: var(--cian-suave); border: 1px solid rgba(94, 234, 212, .3); border-radius: var(--radio-sm); font-size: .88rem; color: #99f6e4; }

/* wizard / pasos */
.wizard { display: flex; flex-direction: column; gap: 16px; }
.wizard-pasos { display: flex; gap: 6px; flex-wrap: wrap; }
.wizard-paso { flex: 1; min-width: 60px; display: flex; flex-direction: column; gap: 6px; align-items: center; font-size: .72rem; color: var(--texto-3); }
.wizard-paso .num { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--fondo-2); border: 1px solid var(--borde); font-weight: 700; }
.wizard-paso.activo .num { background: var(--ambar); color: #241703; border-color: transparent; }
.wizard-paso.hecho .num { background: var(--exito-suave); color: var(--exito); border-color: rgba(74, 222, 128, .4); }
.wizard-paso.activo { color: var(--texto); }

/* confirmación / aprobación */
.confirmacion { display: flex; flex-direction: column; gap: 14px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 20px; }
.confirmacion-acciones { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
.flujo-aprobacion { display: flex; flex-direction: column; gap: 12px; }
.aprobacion-paso { display: flex; align-items: center; gap: 12px; padding: 12px 15px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio-sm); }
.aprobacion-estado { margin-left: auto; font-size: .76rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; }

/* modal / drawer */
.modal-fondo { position: fixed; inset: 0; z-index: 200; background: rgba(5, 8, 18, .7); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; padding: 20px; animation: aparecer .25s ease; }
.modal-caja { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio-lg); padding: 26px; max-width: 480px; width: 100%; display: flex; flex-direction: column; gap: 16px; box-shadow: var(--sombra); animation: comp-entrar .3s ease; }
.modal-titulo { font-size: 1.2rem; }

/* notificación toast */
.toast-zona { position: fixed; bottom: 20px; right: 20px; z-index: 300; display: flex; flex-direction: column; gap: 10px; max-width: min(360px, calc(100vw - 40px)); }
.toast { display: flex; align-items: flex-start; gap: 11px; padding: 14px 16px; background: var(--superficie-2); border: 1px solid var(--borde); border-radius: var(--radio); box-shadow: var(--sombra); font-size: .9rem; animation: toast-entrar .35s cubic-bezier(.2, .8, .2, 1); }
@keyframes toast-entrar { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: none; } }
.toast.saliendo { animation: toast-salir .3s ease forwards; }
@keyframes toast-salir { to { opacity: 0; transform: translateX(30px); } }

/* confetti */
.confetti-lienzo { position: fixed; inset: 0; z-index: 400; pointer-events: none; }

/* ------------------------------------------------------------------ avatar */
.avatar-envoltura { display: flex; align-items: center; gap: 14px; background: linear-gradient(160deg, var(--superficie), var(--fondo-2)); border: 1px solid var(--borde); border-radius: var(--radio); padding: 14px 16px; }
.avatar-lienzo { width: 64px; height: 64px; flex: none; }
.avatar-info { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.avatar-nombre { font-weight: 700; font-size: .95rem; }
.avatar-estado { font-size: .78rem; color: var(--texto-3); display: flex; align-items: center; gap: 6px; }
.avatar-estado .punto-estado { width: 7px; height: 7px; border-radius: 50%; background: var(--cian); }
.avatar-estado.hablando .punto-estado { background: var(--ambar); animation: parpadeo .8s ease-in-out infinite; }
.avatar-estado.pensando .punto-estado { background: var(--violeta); animation: parpadeo 1.4s ease-in-out infinite; }
.avatar-svg .chispa-cuerpo { transform-origin: 60px 60px; animation: chispa-flotar 4s ease-in-out infinite; }
.avatar-svg .chispa-halo { transform-origin: 60px 60px; animation: chispa-halo 3s ease-in-out infinite; }
.avatar-svg .ojo { transform-origin: center; animation: chispa-parpadeo 5s ease-in-out infinite; }
.avatar-svg[data-estado="hablando"] .chispa-boca-abierta { animation: chispa-hablar .35s ease-in-out infinite; transform-origin: 60px 74px; }
.avatar-svg[data-estado="hablando"] .chispa-cuerpo { animation: chispa-flotar 1.6s ease-in-out infinite; }
.avatar-svg[data-estado="pensando"] .chispa-pensando circle { animation: chispa-punto 1.4s ease-in-out infinite; }
.avatar-svg[data-estado="pensando"] .chispa-pensando circle:nth-child(2) { animation-delay: .2s; }
.avatar-svg[data-estado="pensando"] .chispa-pensando circle:nth-child(3) { animation-delay: .4s; }
@keyframes chispa-flotar { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }
@keyframes chispa-halo { 0%, 100% { opacity: .7; transform: scale(1); } 50% { opacity: 1; transform: scale(1.06); } }
@keyframes chispa-parpadeo { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(.1); } }
@keyframes chispa-hablar { 0%, 100% { transform: scaleY(.5); } 50% { transform: scaleY(1.1); } }
@keyframes chispa-punto { 0%, 100% { opacity: .3; } 50% { opacity: 1; } }

/* ------------------------------------------------------------------- login */
.login-envoltura { display: flex; align-items: center; justify-content: center; min-height: 100vh; min-height: 100dvh; padding: 24px; }
.tarjeta-login { display: flex; flex-direction: column; gap: 18px; width: 100%; max-width: 400px; background: linear-gradient(170deg, var(--superficie), var(--fondo-2)); border: 1px solid var(--borde); border-radius: var(--radio-lg); padding: clamp(26px, 5vw, 40px); box-shadow: var(--sombra); animation: comp-entrar .5s ease; }
.login-marca { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; margin-bottom: 6px; }
.login-marca h1 { font-size: 1.5rem; }
.login-marca p { color: var(--texto-3); font-size: .88rem; }
.error-login { background: var(--error-suave); border: 1px solid rgba(248, 113, 113, .35); color: #fecaca; padding: 11px 14px; border-radius: var(--radio-sm); font-size: .86rem; }
.login-nota { color: var(--texto-3); font-size: .78rem; text-align: center; line-height: 1.5; }

/* ------------------------------------------------------------------- admin */
.admin-app { display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh; }
.admin-barra { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 12px; height: var(--barra-alto); padding: 0 clamp(12px, 3vw, 22px); background: rgba(11, 16, 32, .9); backdrop-filter: blur(14px); border-bottom: 1px solid var(--borde-suave); }
.admin-barra-der { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.menu-movil { display: inline-flex; font-size: 1.2rem; padding: 8px 12px; }
.admin-cuerpo { display: flex; flex: 1; min-height: 0; }
.admin-nav { display: flex; flex-direction: column; gap: 3px; width: 232px; flex: none; padding: 16px 12px; border-right: 1px solid var(--borde-suave); background: rgba(15, 22, 48, .4); overflow-y: auto; }
.admin-nav-enlace { display: flex; align-items: center; gap: 11px; padding: 10px 13px; border-radius: var(--radio-sm); color: var(--texto-2); font-size: .88rem; font-weight: 600; cursor: pointer; transition: var(--trans); border: none; background: transparent; text-align: left; width: 100%; }
.admin-nav-enlace:hover { background: var(--superficie); color: var(--texto); }
.admin-nav-enlace.activo { background: var(--ambar-suave); color: var(--ambar); }
.admin-nav-enlace .nav-ico { width: 18px; text-align: center; flex: none; }
.admin-nav-grupo { font-size: .68rem; text-transform: uppercase; letter-spacing: .12em; color: var(--texto-3); font-weight: 700; padding: 14px 13px 6px; }
.admin-main { flex: 1; min-width: 0; padding: clamp(16px, 3vw, 30px); overflow-y: auto; display: flex; flex-direction: column; gap: 22px; }
.admin-seccion-cab { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.admin-seccion-titulo { font-size: 1.5rem; }
.admin-seccion-sub { color: var(--texto-3); font-size: .88rem; margin-top: 4px; }

/* dashboard tarjetas */
.stat-grid { display: flex; flex-wrap: wrap; gap: 14px; }
.stat-tarjeta { flex: 1 1 160px; display: flex; flex-direction: column; gap: 6px; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 18px; }
.stat-valor { font-size: 2rem; font-weight: 800; color: var(--ambar); letter-spacing: -.02em; }
.stat-etq { font-size: .78rem; color: var(--texto-2); text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }

/* paneles admin */
.admin-panel { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.admin-panel-titulo { font-size: 1.05rem; font-weight: 700; }
.admin-fila { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.admin-fila .campo { flex: 1; min-width: 160px; }
.admin-acciones { display: flex; gap: 8px; flex-wrap: wrap; }
.admin-vacio { color: var(--texto-3); text-align: center; padding: 30px; font-size: .9rem; }
.token-visible { font-family: var(--mono); font-size: .82rem; background: var(--fondo-2); padding: 12px 14px; border-radius: var(--radio-sm); border: 1px solid var(--ambar); color: var(--ambar); word-break: break-all; }
.scope-lista { display: flex; flex-wrap: wrap; gap: 7px; }
.scope-chip { font-size: .72rem; font-family: var(--mono); padding: 4px 9px; border-radius: 6px; background: var(--fondo-2); border: 1px solid var(--borde); color: var(--texto-2); cursor: pointer; transition: var(--trans); }
.scope-chip.sel { background: var(--cian-suave); border-color: var(--cian); color: var(--cian); }
.badge { font-size: .7rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: .04em; }
.badge.ok { background: var(--exito-suave); color: var(--exito); }
.badge.off { background: var(--error-suave); color: var(--error); }
.badge.warn { background: var(--aviso-suave); color: var(--aviso); }
.badge.info { background: var(--cian-suave); color: var(--cian); }
.mono { font-family: var(--mono); font-size: .82rem; }
.texto-2 { color: var(--texto-2); }
.texto-3 { color: var(--texto-3); }
.fila-entre { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.consola-prueba { font-family: var(--mono); font-size: .82rem; background: #060912; border: 1px solid var(--borde); border-radius: var(--radio-sm); padding: 16px; max-height: 420px; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.consola-linea { display: flex; gap: 10px; }
.consola-linea .t { color: var(--texto-3); flex: none; }
.consola-linea.ok .m { color: var(--exito); }
.consola-linea.fail .m { color: var(--error); }
.consola-linea.info .m { color: var(--texto-2); }

/* -------------------------------------------------------------------- docs */
.docs-contenedor { max-width: 920px; margin: 0 auto; padding: clamp(18px, 4vw, 40px); display: flex; flex-direction: column; gap: 20px; width: 100%; }
.docs-contenedor h1 { font-size: 2rem; }
.docs-intro { color: var(--texto-2); }
.docs-lista { display: flex; flex-direction: column; gap: 12px; }
.docs-grupo { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--cian); font-weight: 700; margin-top: 14px; }
.docs-endpoint { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); overflow: hidden; }
.docs-endpoint-cab { display: flex; align-items: center; gap: 12px; padding: 14px 16px; cursor: pointer; }
.docs-metodo { font-family: var(--mono); font-size: .72rem; font-weight: 700; padding: 4px 9px; border-radius: 6px; flex: none; }
.docs-metodo.get { background: var(--cian-suave); color: var(--cian); }
.docs-metodo.post { background: var(--ambar-suave); color: var(--ambar); }
.docs-metodo.put { background: rgba(167, 139, 250, .15); color: var(--violeta); }
.docs-metodo.delete { background: var(--error-suave); color: var(--error); }
.docs-ruta { font-family: var(--mono); font-size: .85rem; color: var(--texto); }
.docs-resumen { color: var(--texto-3); font-size: .82rem; margin-left: auto; text-align: right; }
.docs-detalle { padding: 0 16px 16px; display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--borde-suave); }
.docs-detalle pre { background: #060912; border: 1px solid var(--borde); border-radius: var(--radio-sm); padding: 14px; overflow-x: auto; font-family: var(--mono); font-size: .78rem; color: var(--texto-2); margin: 0; }

/* ------------------------------------------------------------- animaciones */
@keyframes aparecer { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.anim-aparecer { animation: aparecer .4s ease both; }

/* --------------------------------------------------------------- responsive */
/* Tablet: el panel pasa a un lateral sólo cuando hay ancho suficiente. */
@media (min-width: 720px) {
  .ejercicio-opciones { flex-direction: row; flex-wrap: wrap; }
  .ejercicio-opciones .opcion { flex: 1 1 calc(50% - 9px); }
}

/* Escritorio: pizarrón + panel en dos columnas flex. */
@media (min-width: 960px) {
  .escenario-regiones { flex-direction: row; align-items: stretch; }
  .region-pizarron { flex: 1 1 auto; }
  .region-panel { flex: 0 0 380px; max-width: 380px; }
  .menu-movil { display: none; }
}

@media (max-width: 959px) {
  .admin-nav { position: fixed; top: var(--barra-alto); left: 0; bottom: 0; z-index: 60; transform: translateX(-100%); transition: transform var(--trans); box-shadow: var(--sombra); width: 250px; }
  .admin-nav.abierto { transform: translateX(0); }
  .admin-nav-fondo { position: fixed; inset: var(--barra-alto) 0 0; z-index: 55; background: rgba(5, 8, 18, .6); }
}

@media (max-width: 560px) {
  .barra-acciones .enlace-suave { display: none; }
  .etiqueta-voz { display: none; }
  .arranque-leccion { flex-direction: column; align-items: stretch; }
  .arranque-leccion .boton-grande { width: 100%; }
  .docs-resumen { display: none; }
  .admin-barra-der .enlace-suave { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}