:root {
    --azul: #2563eb;
    --azul-claro: #3b82f6;
    --verde: #22c55e;
    --rojo: #dc2626;
    --texto: #0f172a;
    --suave: #64748b;
    --borde: #e2e8f0;
    --fondo: #f8fafc;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background: var(--fondo);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--texto);
    line-height: 1.6;
}
a { color: var(--azul); }

/* Barra superior */
.barra { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.05); position: sticky; top: 0; z-index: 10; }
.barra-contenido { max-width: 1100px; margin: 0 auto; padding: 12px 16px; display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.marca { display: flex; align-items: center; gap: 8px; text-decoration: none; font-size: 22px; font-weight: 700; color: var(--azul); }
.menu { display: flex; gap: 18px; }
.menu a { color: #475569; text-decoration: none; font-weight: 600; font-size: 15px; }
.menu a:hover { color: var(--azul); }

.contenedor { max-width: 1100px; margin: 0 auto; padding: 32px 16px 60px; }
h1 { font-size: 30px; line-height: 1.25; margin-bottom: 8px; }
h2 { font-size: 21px; margin-bottom: 12px; }
.sub { color: var(--suave); margin-bottom: 24px; }
.peque { font-size: 13px; color: var(--suave); }
.centro { text-align: center; margin-top: 16px; }

/* Avisos */
.aviso { padding: 14px 16px; border-radius: 10px; margin-bottom: 20px; font-size: 15px; }
.aviso-ok { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.aviso-error { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

/* Formularios */
.caja-form { max-width: 460px; margin: 0 auto; background: #fff; padding: 32px 24px; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,.06); }
.caja-form label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 16px; }
.caja-form input[type=text], .caja-form input[type=email], .caja-form input[type=tel], .caja-form input[type=password] {
    display: block; width: 100%; margin-top: 6px; padding: 12px; font-size: 16px;
    border: 2px solid #cbd5e1; border-radius: 10px; background: #fff;
}
.caja-form input:focus { outline: none; border-color: var(--azul-claro); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.caja-form .check { display: flex; gap: 10px; font-weight: 400; font-size: 13px; color: #475569; }
.caja-form .check input { margin-top: 3px; width: 18px; height: 18px; flex-shrink: 0; }

/* Botones */
.boton {
    display: inline-block; padding: 13px 24px; border: none; border-radius: 10px; cursor: pointer;
    background: linear-gradient(135deg, var(--azul-claro), var(--azul)); color: #fff;
    font-size: 16px; font-weight: 600; text-decoration: none; text-align: center;
}
.caja-form .boton { width: 100%; }
.boton:hover { filter: brightness(1.07); }
.boton-sec { background: #e2e8f0; color: var(--texto); }
.boton-whatsapp { background: #25d366; }
.boton-mini { padding: 7px 12px; font-size: 13px; margin: 2px 0; }

/* Panel del alumno */
.bienvenida { margin-bottom: 28px; }
.barra-progreso { height: 12px; background: var(--borde); border-radius: 99px; overflow: hidden; max-width: 500px; margin-top: 10px; }
.barra-progreso div { height: 100%; background: linear-gradient(90deg, var(--azul-claro), var(--verde)); border-radius: 99px; }
.pendiente { background: #fef3c7; border: 2px solid #fbbf24; border-radius: 16px; padding: 24px; margin-bottom: 28px; }
.pendiente p { margin-bottom: 10px; color: #78350f; }

.rejilla-modulos { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.tarjeta-modulo {
    display: flex; flex-direction: column; background: #fff; border-radius: 14px; padding: 20px;
    text-decoration: none; color: var(--texto); border: 2px solid transparent;
    box-shadow: 0 2px 12px rgba(0,0,0,.05); transition: transform .2s, border-color .2s;
}
.tarjeta-modulo:hover { transform: translateY(-3px); border-color: var(--azul-claro); }
.tarjeta-modulo h3 { font-size: 18px; margin: 10px 0 6px; }
.tarjeta-modulo p { font-size: 14px; color: var(--suave); flex: 1; }
.tarjeta-modulo.hecho { border-color: #86efac; }
.tarjeta-modulo.bloqueado { opacity: .55; cursor: default; }
.tarjeta-modulo.bloqueado:hover { transform: none; border-color: transparent; }
.tm-cabeza { display: flex; justify-content: space-between; align-items: center; }
.tm-numero { font-size: 13px; font-weight: 700; color: var(--azul); text-transform: uppercase; letter-spacing: .5px; }
.tm-nivel { font-size: 12px; font-weight: 700; background: #dbeafe; color: var(--azul); padding: 3px 10px; border-radius: 99px; }
.tm-estado { margin-top: 14px; font-size: 14px; font-weight: 600; color: #475569; }

/* Página de módulo */
.migas { font-size: 14px; color: var(--suave); margin-bottom: 16px; }
.modulo-cabeza { margin-bottom: 24px; }
.modulo-cabeza .tm-nivel { display: inline-block; margin-bottom: 10px; }
.modulo-cabeza p { color: var(--suave); font-size: 17px; }
.hecho-etiqueta { color: #166534 !important; font-weight: 600; margin-top: 8px; }
.bloque { background: #fff; border-radius: 14px; padding: 24px 20px; margin-bottom: 20px; box-shadow: 0 2px 12px rgba(0,0,0,.04); }
.bloque p { margin-bottom: 10px; }
.objetivos, .frases, .materiales { padding-left: 20px; }
.objetivos li, .frases li, .materiales li { margin-bottom: 8px; }
.trad { color: var(--suave); font-size: 14px; }
.en { font-weight: 600; }
.escuchar { background: none; border: none; cursor: pointer; font-size: 15px; padding: 0 4px; vertical-align: middle; opacity: .7; }
.escuchar:hover { opacity: 1; }

.video { position: relative; padding-top: 56.25%; border-radius: 12px; overflow: hidden; background: #000; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-pronto { background: #eff6ff; border: 2px dashed #93c5fd; border-radius: 12px; padding: 28px 16px; text-align: center; color: #1e40af; }

.tabla { width: 100%; border-collapse: collapse; font-size: 15px; }
.tabla th { text-align: left; background: #f1f5f9; padding: 10px 12px; font-size: 13px; text-transform: uppercase; color: #475569; }
.tabla td { padding: 10px 12px; border-bottom: 1px solid var(--borde); vertical-align: top; }
.tabla-scroll { overflow-x: auto; }

.ejemplos { display: grid; gap: 10px; margin-top: 12px; }
.ejemplo { background: #f8fafc; border-left: 4px solid var(--azul-claro); padding: 10px 14px; border-radius: 6px; }
.dialogo .linea { padding: 10px 0; border-bottom: 1px solid var(--borde); }
.dialogo .linea:last-child { border-bottom: none; }

/* Ejercicios */
.pregunta { border: 2px solid var(--borde); border-radius: 12px; padding: 16px; margin-bottom: 14px; }
.pregunta legend { font-weight: 700; padding: 0 6px; }
.opcion { display: block; padding: 8px 4px; cursor: pointer; }
.opcion input { margin-right: 8px; }
.pregunta.correcta { border-color: #86efac; background: #f0fdf4; }
.pregunta.incorrecta { border-color: #fca5a5; background: #fef2f2; }
.explicacion { margin-top: 8px; font-size: 14px; color: #334155; background: #fff; border-radius: 8px; padding: 8px 10px; }
.resultado { margin-top: 16px; padding: 14px; border-radius: 10px; font-weight: 600; }
.reto { background: linear-gradient(135deg, #dbeafe, #eff6ff); }

.navegacion-modulos { display: flex; justify-content: space-between; gap: 12px; margin-top: 10px; }

/* Administración */
.tabla.admin td { font-size: 14px; }
.acciones form { display: flex; flex-direction: column; gap: 4px; }
.clave { display: inline-block; font-size: 20px; background: #fff; padding: 4px 10px; border-radius: 6px; margin: 6px 0; }
.vacio { background: #fff; padding: 24px; border-radius: 12px; }
.ayuda-admin { margin-top: 30px; }
.ayuda-admin h2 { font-size: 18px; margin-top: 10px; }
code { background: #f1f5f9; padding: 1px 6px; border-radius: 4px; font-size: 14px; }

.pie { text-align: center; padding: 24px 16px; color: var(--suave); font-size: 14px; border-top: 1px solid var(--borde); }

@media (max-width: 600px) {
    h1 { font-size: 24px; }
    .bloque { padding: 18px 14px; }
    .menu { gap: 14px; }
    .tabla { font-size: 14px; }
}

/* Racha y lección de hoy */
.hoy { display: grid; grid-template-columns: minmax(200px, 280px) 1fr; gap: 16px; margin-bottom: 30px; }
.racha-caja { display: flex; align-items: center; gap: 14px; background: #fff; border-radius: 14px; padding: 18px; box-shadow: 0 2px 12px rgba(0,0,0,.05); }
.racha-fuego { font-size: 42px; filter: grayscale(1); opacity: .5; }
.racha-caja.encendida .racha-fuego { filter: none; opacity: 1; }
.racha-numero { font-size: 24px; font-weight: 800; color: #ea580c; }
.racha-texto { font-size: 13px; color: var(--suave); }
.leccion-hoy {
    display: block; text-decoration: none; color: #fff; border-radius: 14px; padding: 20px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8); box-shadow: 0 6px 20px rgba(37,99,235,.3);
}
.leccion-hoy .boton { margin-top: 12px; background: #fff; color: var(--azul); padding: 10px 20px; }
.lh-etiqueta { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; opacity: .85; }
.lh-titulo { font-size: 20px; font-weight: 700; margin: 4px 0; }
.lh-meta { font-size: 15px; opacity: .9; }

/* Camino de lecciones */
.camino { list-style: none; display: grid; gap: 10px; }
.camino a {
    display: flex; align-items: center; gap: 14px; padding: 12px 14px; border-radius: 12px;
    text-decoration: none; color: var(--texto); border: 2px solid var(--borde);
}
.camino a:hover { border-color: var(--azul-claro); }
.camino-punto {
    width: 38px; height: 38px; flex-shrink: 0; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; background: #e2e8f0; color: #475569;
}
.camino-texto { flex: 1; display: flex; flex-direction: column; }
.camino-texto span { font-size: 14px; color: var(--suave); }
.camino-estado { font-size: 14px; font-weight: 700; color: var(--azul); white-space: nowrap; }
.camino .hecha a { border-color: #86efac; background: #f0fdf4; }
.camino .hecha .camino-punto { background: var(--verde); color: #fff; }
.camino .hecha .camino-estado { color: #166534; }
.camino .proxima a { border-color: var(--azul-claro); background: #eff6ff; }
.camino .proxima .camino-punto { background: var(--azul); color: #fff; }
.titulo-guia { margin: 34px 0 14px; font-size: 22px; }

@media (max-width: 600px) {
    .hoy { grid-template-columns: 1fr; }
}

.camino li { position: relative; }
.camino li a:not(.camino-pdf) { padding-right: 150px; }
.camino-pdf {
    position: absolute; right: 12px; top: 50%; transform: translateY(-50%); z-index: 2;
    font-size: 13px; font-weight: 700; color: #475569 !important; background: #f1f5f9;
    border: 1px solid #e2e8f0 !important; border-radius: 8px; padding: 5px 9px !important; text-decoration: none;
}
.camino-pdf:hover { background: #e2e8f0; }
.camino .camino-estado { margin-right: 58px; }
@media (max-width: 600px) {
    .camino li a:not(.camino-pdf) { padding-right: 70px; }
    .camino .camino-estado { display: none; }
}

/* Pago */
.precio { font-size: 34px; font-weight: 800; color: var(--texto) !important; margin: 6px 0 14px !important; }
.precio span { font-size: 15px; font-weight: 600; color: var(--suave); }
.boton-mp { background: #009ee3; font-size: 18px; padding: 15px 30px; margin-bottom: 12px; }
.pendiente .peque { color: #78350f; }
.boton-bold { background: #121e6c; font-size: 18px; padding: 15px 30px; margin-bottom: 12px; }
.referencia { background: #fff; border: 2px dashed #fbbf24; border-radius: 12px; padding: 14px; margin-bottom: 16px; color: #78350f; font-size: 15px; }
.referencia-correo { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.referencia-correo code { font-size: 16px; background: #fef3c7; padding: 6px 10px; border-radius: 8px; color: #0f172a; word-break: break-all; }
.galeria { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.galeria img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--borde); }
.boton-peligro { background: #fee2e2; color: #991b1b; }
.boton-peligro:hover { background: #fecaca; }

/* Tutor de IA */
.tutor-cabeza { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.tutor-cabeza .sub { margin-bottom: 0; }
.tutor-modulo select { padding: 8px 10px; border: 2px solid #cbd5e1; border-radius: 10px; font-size: 14px; max-width: 100%; }
.chat { background: #fff; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,.06); display: flex; flex-direction: column; height: min(70vh, 640px); margin-bottom: 12px; }
.chat-mensajes { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.burbuja { max-width: 82%; padding: 11px 14px; border-radius: 16px; font-size: 16px; line-height: 1.5; }
.burbuja.tutor { background: #eff6ff; border: 1px solid #dbeafe; align-self: flex-start; border-bottom-left-radius: 4px; }
.burbuja.yo { background: var(--azul); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.burbuja.correccion { background: #fef3c7; border: 1px solid #fde68a; color: #78350f; align-self: flex-start; font-size: 14px; }
.burbuja.aviso-chat { background: #fee2e2; color: #991b1b; align-self: center; font-size: 14px; text-align: center; }
.b-trad { margin-top: 6px; font-size: 14px; color: var(--suave); }
.b-acciones { margin-top: 6px; display: flex; gap: 14px; }
.enlace { background: none; border: none; color: var(--azul); cursor: pointer; font-size: 13px; font-weight: 600; padding: 0; }
.chat-pie { border-top: 1px solid var(--borde); padding: 12px; }
.chat-escribiendo { font-size: 13px; color: var(--suave); margin-bottom: 6px; }
.chat-form { display: flex; gap: 8px; align-items: flex-end; }
.chat-form textarea { flex: 1; resize: none; font: inherit; font-size: 16px; padding: 11px 12px; border: 2px solid #cbd5e1; border-radius: 12px; }
.chat-form textarea:focus { outline: none; border-color: var(--azul-claro); }
.chat-mic { width: 46px; height: 46px; flex-shrink: 0; border-radius: 50%; border: none; background: #dcfce7; font-size: 20px; cursor: pointer; }
.chat-mic.activo { background: #22c55e; }
.chat-enviar { padding: 12px 18px; }
.chat-opciones { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; margin-top: 8px; font-size: 13px; color: var(--suave); }
.tarjeta-tutor { display: flex; align-items: center; gap: 14px; background: #fff; border: 2px solid #dbeafe; border-radius: 14px; padding: 16px 18px; margin-bottom: 26px; text-decoration: none; color: var(--texto); }
.tarjeta-tutor:hover { border-color: var(--azul-claro); }
.tarjeta-tutor .tt-ico { font-size: 34px; }
.tarjeta-tutor strong { display: block; font-size: 17px; }
.tarjeta-tutor span { font-size: 14px; color: var(--suave); }
@media (max-width: 600px) { .burbuja { max-width: 92%; } .chat { height: 68vh; } }
.gratis h2 { margin-bottom: 10px; }
.pasos-gratis { padding-left: 22px; margin: 10px 0 14px; }
.pasos-gratis li { margin-bottom: 6px; }
.instrucciones { width: 100%; font: inherit; font-size: 14px; padding: 12px; border: 2px dashed #93c5fd; border-radius: 12px; background: #f8fafc; resize: vertical; margin-bottom: 12px; }
.botones-gratis { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }

/* Mini clases en video (verticales) */
.mini-clases { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.mini-clases video { width: 100%; aspect-ratio: 9 / 16; border-radius: 14px; background: #dbeafe; border: 1px solid var(--borde); }

/* Examen del módulo */
.examen-caja { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; background: #fff; border: 2px solid var(--borde); border-radius: 14px; padding: 16px 18px; margin-bottom: 18px; }
.examen-caja .ex-ico { font-size: 34px; }
.examen-caja .ex-texto { flex: 1; min-width: 200px; }
.examen-caja strong { display: block; font-size: 17px; }
.examen-caja span { font-size: 14px; color: var(--suave); }
.examen-caja.listo { border-color: #93c5fd; background: #eff6ff; }
.examen-caja.aprobado { border-color: #86efac; background: #f0fdf4; }
.examen-caja.bloqueado { opacity: .85; }
.tm-examen { display: block; font-size: 13px; margin-top: 4px; }

/* Tarjeta «Instala la app» */
.instalar-app { display: flex; align-items: center; gap: 12px; background: #eff6ff; border: 2px solid #bfdbfe; border-radius: 14px; padding: 12px 14px; margin-bottom: 18px; }
.instalar-app[hidden] { display: none; }
.instalar-app .ia-icono { width: 52px; height: 52px; border-radius: 12px; box-shadow: 0 2px 8px rgba(15,23,42,.12); flex-shrink: 0; }
.instalar-app .ia-texto { flex: 1; font-size: 14px; color: var(--texto); }
.instalar-app .ia-texto strong { display: block; font-size: 15px; margin-bottom: 2px; }
.instalar-app .ia-texto .boton { margin-top: 8px; }
.instalar-app .ia-compartir { display: inline-block; border: 1.5px solid #2563eb; color: #2563eb; border-radius: 4px; padding: 0 4px; font-size: 12px; }
.instalar-app .ia-cerrar { background: none; border: 0; font-size: 18px; color: var(--suave); cursor: pointer; padding: 4px; align-self: flex-start; }

/* Página «Instala la app» */
.app-instalar { max-width: 620px; margin: 0 auto; text-align: center; }
.app-instalar .ai-icono { border-radius: 22px; box-shadow: 0 6px 18px rgba(15,23,42,.15); margin-bottom: 14px; }
.ai-pasos { text-align: left; background: #fff; border: 2px solid var(--borde); border-radius: 14px; padding: 16px 20px; margin: 16px 0; }
.ai-pasos h2 { font-size: 19px; margin-bottom: 8px; }
.ai-pasos ol { padding-left: 22px; }
.ai-pasos li { margin-bottom: 6px; }
.ai-pasos .boton { margin-bottom: 10px; }
.destacado-pasos { border-color: #93c5fd; background: #eff6ff; }
@media (max-width: 600px) { .menu-app { display: inline; } }

/* Racha: semana en el inicio */
.semana-racha { display: flex; gap: 6px; margin-top: 10px; }
.sr-dia { display: flex; flex-direction: column; align-items: center; gap: 2px; width: 30px; }
.sr-icono { width: 28px; height: 28px; border-radius: 50%; background: #f1f5f9; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.sr-dia.si .sr-icono { background: #ffedd5; }
.sr-dia.hoy .sr-icono { box-shadow: 0 0 0 2px #fb923c; }
.sr-letra { font-size: 11px; font-weight: 700; color: var(--suave); }
.ver-racha { display: inline-block; margin-top: 8px; font-size: 13px; font-weight: 700; color: var(--azul); text-decoration: none; }

/* Página Mi racha */
.racha-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 14px 0 8px; }
.rs { background: #fff; border-radius: 14px; padding: 16px 10px; text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,.05); }
.rs.encendida { background: #fff7ed; }
.rs-num { display: block; font-size: 26px; font-weight: 800; color: #ea580c; }
.rs-txt { font-size: 13px; color: var(--suave); }
.racha-consejo { text-align: center; margin-bottom: 18px; }
.cal-cabeza { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
.cal-cabeza h2 { margin: 0; }
.cal-flecha { font-size: 28px; font-weight: 700; text-decoration: none; color: var(--azul); padding: 0 12px; }
.cal-flecha.apagada { color: #cbd5e1; }
.calendario { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; max-width: 460px; margin: 12px auto 0; }
.cal-dia-nombre { text-align: center; font-size: 12px; font-weight: 700; color: var(--suave); }
.cal-dia { aspect-ratio: 1; border-radius: 10px; background: #f8fafc; display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative; }
.cal-num { font-size: 13px; font-weight: 600; color: #475569; }
.cal-fuego { font-size: 16px; line-height: 1; }
.cal-dia.si { background: #ffedd5; }
.cal-dia.si .cal-num { color: #c2410c; font-weight: 800; }
.cal-dia.hoy { box-shadow: inset 0 0 0 2px #fb923c; }
.cal-dia.futuro { opacity: .4; }
.mapa-scroll { overflow-x: auto; padding-bottom: 6px; }
.mapa { display: flex; gap: 3px; width: max-content; margin-top: 10px; }
.mapa-dias, .mapa-semana { display: flex; flex-direction: column; gap: 3px; }
.mapa-dias span { height: 13px; font-size: 10px; line-height: 13px; color: var(--suave); padding-right: 4px; }
.mapa-dias span:first-child, .mapa-mes { height: 14px; font-size: 10px; color: var(--suave); white-space: nowrap; }
.celda { display: inline-block; width: 13px; height: 13px; border-radius: 3px; background: #ebedf0; }
.celda.n1 { background: #fed7aa; }
.celda.n2 { background: #fdba74; }
.celda.n3 { background: #f97316; }
.celda.n4 { background: #c2410c; }
.celda.vacia { background: transparent; }
.celda.hoy { outline: 2px solid #1d4ed8; outline-offset: -1px; }
.mapa-leyenda { display: flex; align-items: center; justify-content: flex-end; gap: 4px; font-size: 12px; color: var(--suave); margin-top: 8px; }
@media (max-width: 600px) { .rs-num { font-size: 21px; } .racha-stats { gap: 8px; } }