/* ==========================================================================
   COATZADRONE CHILE — Sistema de diseño
   Gráfica corporativa heredada de coatzadrone.com
   Tipografías: Teko (display) + Mukta (texto) · Acento: #DD3330
   ========================================================================== */

:root {
  /* Marca */
  --rojo:        #DD3330;
  --rojo-osc:    #B02824;
  --rojo-claro:  #FF4A46;

  /* Neutros oscuros */
  --negro:       #0D0D0D;
  --carbon:      #141414;
  --grafito:     #1C1C1C;
  --grafito-2:   #262626;
  --borde:       #333333;

  /* Neutros claros */
  --blanco:      #FFFFFF;
  --hueso:       #F7F7F7;
  --gris:        #9A9A9A;
  --gris-osc:    #5E646A;

  /* Tipografía */
  --display: 'Teko', 'Arial Narrow', sans-serif;
  --texto:   'Mukta', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Métricas */
  --ancho:      1200px;
  --ancho-txt:  760px;
  --radio:      4px;
  --radio-lg:   8px;
  --transicion: 220ms cubic-bezier(.4, 0, .2, 1);
  --header-h:   74px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--negro);
  color: var(--blanco);
  font-family: var(--texto);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
[hidden] { display: none !important; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 0.95;
  letter-spacing: 0.01em;
  margin: 0 0 .4em;
}

h1 { font-size: clamp(2.8rem, 7vw, 5.2rem); }
h2 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h4 { font-size: 1.35rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

::selection { background: var(--rojo); color: var(--blanco); }

:focus-visible {
  outline: 3px solid var(--rojo-claro);
  outline-offset: 3px;
}

/* ---------- Utilidades ---------- */
.contenedor {
  width: 100%;
  max-width: var(--ancho);
  margin-inline: auto;
  padding-inline: 20px;
}

.seccion { padding-block: clamp(64px, 9vw, 120px); }
.seccion--claro { background: var(--hueso); color: var(--negro); }
.seccion--carbon { background: var(--carbon); }
.seccion--grafito { background: var(--grafito); }

.eyebrow {
  font-family: var(--texto);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--rojo);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: '';
  width: 34px;
  height: 2px;
  background: var(--rojo);
  flex: none;
}
.eyebrow--centrado { justify-content: center; }

.rojo { color: var(--rojo); }
.encabezado-seccion { max-width: var(--ancho-txt); margin-bottom: 52px; }
.encabezado-seccion.centrado { margin-inline: auto; text-align: center; }
.encabezado-seccion.centrado .eyebrow { justify-content: center; }
.encabezado-seccion p { color: var(--gris); font-size: 1.08rem; }
.seccion--claro .encabezado-seccion p { color: var(--gris-osc); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border: 2px solid transparent;
  border-radius: var(--radio);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: var(--transicion);
  text-align: center;
  line-height: 1.3;
}
.btn--primario { background: var(--rojo); color: var(--blanco); border-color: var(--rojo); }
.btn--primario:hover { background: var(--rojo-osc); border-color: var(--rojo-osc); transform: translateY(-2px); }
.btn--fantasma { border-color: rgba(255,255,255,.4); color: var(--blanco); }
.btn--fantasma:hover { border-color: var(--blanco); background: rgba(255,255,255,.08); }
.seccion--claro .btn--fantasma { border-color: rgba(0,0,0,.25); color: var(--negro); }
.seccion--claro .btn--fantasma:hover { border-color: var(--negro); background: rgba(0,0,0,.05); }
.btn--bloque { width: 100%; }
.btn[disabled], .btn--inactivo {
  opacity: .45;
  pointer-events: none;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(13,13,13,.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background var(--transicion), border-color var(--transicion);
  padding-top: env(safe-area-inset-top, 0px);
}
.header.compacto {
  background: rgba(13,13,13,.96);
  border-bottom-color: var(--borde);
}
.header__inner {
  width: 100%;
  max-width: var(--ancho);
  margin-inline: auto;
  padding-inline: 20px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.marca { display: flex; align-items: center; gap: 12px; flex: none; }
.marca img { width: 158px; }
.marca__pais {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--rojo);
  border-left: 1px solid var(--borde);
  padding-left: 12px;
  line-height: 1;
  padding-top: 3px;
}
.nav { margin-left: auto; display: flex; align-items: center; gap: 30px; }
.nav a {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--gris);
  transition: color var(--transicion);
  position: relative;
}
.nav a:hover, .nav a.activo { color: var(--blanco); }
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -7px;
  width: 0; height: 2px;
  background: var(--rojo);
  transition: width var(--transicion);
}
.nav a:hover::after { width: 100%; }
.header .btn { padding: 11px 22px; font-size: .72rem; }

.menu-btn {
  display: none;
  margin-left: auto;
  width: 44px; height: 44px;
  background: none;
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  color: var(--blanco);
  align-items: center;
  justify-content: center;
}
.menu-btn span {
  display: block;
  width: 20px; height: 2px;
  background: currentColor;
  position: relative;
  transition: var(--transicion);
}
.menu-btn span::before, .menu-btn span::after {
  content: ''; position: absolute; left: 0;
  width: 20px; height: 2px; background: currentColor;
  transition: var(--transicion);
}
.menu-btn span::before { top: -6px; }
.menu-btn span::after { top: 6px; }
.menu-btn[aria-expanded="true"] span { background: transparent; }
.menu-btn[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 60px;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background: url('../img/Coatzadrone-hero-bg.jpg') center/cover no-repeat;
  transform: scale(1.04);
}
.hero__bg::after {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(105deg, rgba(13,13,13,.95) 0%, rgba(13,13,13,.82) 45%, rgba(13,13,13,.45) 100%),
    linear-gradient(0deg, var(--negro) 0%, rgba(13,13,13,0) 55%);
}
.hero .contenedor { position: relative; z-index: 2; }
.hero__contenido { max-width: 820px; }
.hero h1 { margin-bottom: 20px; }
.hero h1 .rojo { display: block; }
.hero__sub {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: #D8D8D8;
  max-width: 640px;
  margin-bottom: 34px;
}
.hero__acciones { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero__datos {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,.16);
  max-width: 700px;
}
.dato { display: flex; align-items: baseline; gap: 10px; }
.dato__num {
  font-family: var(--display);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--rojo);
}
.dato__txt {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--gris);
  font-weight: 600;
  line-height: 1.3;
  max-width: 150px;
}

/* ---------- Franja de credencial Pix4D ---------- */
.credencial { background: var(--rojo); color: var(--blanco); padding-block: 26px; }
.credencial__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 20px;
  text-align: center;
}
.credencial__txt { font-size: 1rem; font-weight: 500; }
.credencial__txt strong { font-weight: 800; }
.credencial a {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  white-space: nowrap;
  transition: opacity var(--transicion);
}
.credencial a:hover { opacity: .75; }

/* ---------- Tarjetas de curso ---------- */
.grid-cursos {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 28px;
}
.curso-card {
  display: flex;
  flex-direction: column;
  background: var(--grafito);
  border: 1px solid var(--borde);
  border-radius: var(--radio-lg);
  overflow: hidden;
  transition: var(--transicion);
}
.curso-card:hover { transform: translateY(-5px); border-color: var(--rojo); }
.curso-card__media { position: relative; aspect-ratio: 16 / 9; background: var(--grafito-2); }
.curso-card__media img { width: 100%; height: 100%; object-fit: cover; }
.curso-card__media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(28,28,28,.95) 0%, rgba(28,28,28,0) 60%);
}
.curso-card__software {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 2;
  background: var(--negro);
  color: var(--blanco);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 11px;
  border-radius: 3px;
}
.curso-card__cuerpo { padding: 24px; display: flex; flex-direction: column; flex: 1; gap: 14px; }
.curso-card h3 { margin: 0; font-size: 1.6rem; }
.curso-card__resumen { color: var(--gris); font-size: .95rem; margin: 0; }
.curso-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: .82rem;
  color: var(--gris);
  padding-top: 4px;
}
.curso-card__meta span { display: inline-flex; align-items: center; gap: 6px; }
.curso-card__pie {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--borde);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.curso-card__precio { font-family: var(--display); font-size: 1.6rem; line-height: 1; }
.curso-card__precio small {
  display: block;
  font-family: var(--texto);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--gris);
  margin-top: 4px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 100px;
  border: 1px solid currentColor;
}
.pill--abierto { color: #4ADE80; }
.pill--proximo { color: var(--gris); }
.pill--punto::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- Temario (acordeón) ---------- */
.modulos { display: grid; gap: 14px; }
.modulo {
  background: var(--grafito);
  border: 1px solid var(--borde);
  border-radius: var(--radio-lg);
  overflow: hidden;
  transition: border-color var(--transicion);
}
.modulo[open] { border-color: var(--rojo); }
.modulo summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.modulo summary::-webkit-details-marker { display: none; }
.modulo__num {
  font-family: var(--display);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--rojo);
  flex: none;
  width: 46px;
}
.modulo__titulo {
  font-family: var(--display);
  font-size: 1.45rem;
  text-transform: uppercase;
  line-height: 1.1;
  flex: 1;
}
.modulo__flecha {
  flex: none;
  width: 22px; height: 22px;
  border-right: 2px solid var(--gris);
  border-bottom: 2px solid var(--gris);
  transform: rotate(45deg) translate(-4px, -4px);
  transition: var(--transicion);
}
.modulo[open] .modulo__flecha { transform: rotate(-135deg) translate(-4px, -4px); border-color: var(--rojo); }
.modulo__cuerpo { padding: 0 24px 26px 88px; }
.modulo__objetivo {
  color: var(--gris);
  font-size: .95rem;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--borde);
}
.lista-check { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.lista-check li { position: relative; padding-left: 26px; font-size: .96rem; }
.lista-check li::before {
  content: '';
  position: absolute;
  left: 2px; top: .62em;
  width: 8px; height: 8px;
  border-right: 2px solid var(--rojo);
  border-bottom: 2px solid var(--rojo);
  transform: rotate(45deg);
}
.seccion--claro .lista-check li::before { border-color: var(--rojo); }

/* ---------- Grid genérico de bloques ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 22px; }

.bloque {
  background: var(--grafito);
  border: 1px solid var(--borde);
  border-radius: var(--radio-lg);
  padding: 30px;
}
.seccion--claro .bloque { background: var(--blanco); border-color: #E2E2E2; }
.bloque h4 { color: inherit; }

.beneficio { display: flex; gap: 18px; align-items: flex-start; }
.beneficio__num {
  font-family: var(--display);
  font-size: 2.6rem;
  line-height: .9;
  color: var(--rojo);
  flex: none;
  opacity: .9;
}
.beneficio h4 { margin-bottom: 6px; font-size: 1.25rem; }
.beneficio p { color: var(--gris); font-size: .94rem; margin: 0; }
.seccion--claro .beneficio p { color: var(--gris-osc); }

/* ---------- Instructor ---------- */
.instructor { display: grid; grid-template-columns: 240px 1fr; gap: 44px; align-items: start; }
.instructor__foto {
  aspect-ratio: 1;
  border-radius: var(--radio-lg);
  background: var(--grafito-2) url('../img/Coatzadrone-hero-bg.jpg') center/cover;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--borde);
}
.instructor__foto img { width: 100%; height: 100%; object-fit: cover; }
.instructor__iniciales {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--grafito) 0%, var(--negro) 100%);
  font-family: var(--display);
  font-size: 4.5rem;
  color: var(--rojo);
  letter-spacing: .05em;
}
.instructor__cargo {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--rojo);
  margin-bottom: 14px;
}
.instructor__bio { color: var(--gris); }
.enlace-verificar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--blanco);
  border-bottom: 2px solid var(--rojo);
  padding-bottom: 3px;
  transition: var(--transicion);
}
.enlace-verificar:hover { color: var(--rojo); }

/* ---------- Precio / Inscripción ---------- */
.precio-caja {
  background: var(--grafito);
  border: 1px solid var(--borde);
  border-top: 4px solid var(--rojo);
  border-radius: var(--radio-lg);
  padding: 36px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.precio-caja__monto { font-family: var(--display); font-size: 3.4rem; line-height: 1; margin-bottom: 4px; }
.precio-caja__nota { font-size: .86rem; color: var(--gris); margin-bottom: 24px; }
.precio-caja ul { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 11px; }
.precio-caja li { position: relative; padding-left: 26px; font-size: .93rem; }
.precio-caja li::before {
  content: '';
  position: absolute; left: 2px; top: .6em;
  width: 8px; height: 8px;
  border-right: 2px solid var(--rojo);
  border-bottom: 2px solid var(--rojo);
  transform: rotate(45deg);
}

.medios-pago {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--borde);
}
.medio {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--gris);
  border: 1px solid var(--borde);
  border-radius: 3px;
  padding: 5px 10px;
}

/* ---------- Cohortes / calendario ---------- */
.cohortes { display: grid; gap: 14px; }
.cohorte {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  padding: 20px 24px;
  background: var(--grafito);
  border: 1px solid var(--borde);
  border-left: 3px solid var(--rojo);
  border-radius: var(--radio);
}
.cohorte__fecha { font-family: var(--display); font-size: 1.7rem; line-height: 1; min-width: 150px; }
.cohorte__detalle { font-size: .9rem; color: var(--gris); flex: 1; min-width: 200px; }
.cohorte__acciones { display: flex; gap: 10px; flex-wrap: wrap; margin-left: auto; }
.btn-mini {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 9px 16px;
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  background: none;
  color: var(--blanco);
  transition: var(--transicion);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.btn-mini:hover { border-color: var(--rojo); color: var(--rojo); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; max-width: 880px; }
.faq details {
  border-bottom: 1px solid #DDD;
  padding-bottom: 4px;
}
.seccion--claro .faq details { border-color: #DDD; }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 40px 18px 0;
  font-family: var(--display);
  font-size: 1.35rem;
  text-transform: uppercase;
  line-height: 1.15;
  position: relative;
  transition: color var(--transicion);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--rojo); }
.faq summary::after {
  content: '+';
  position: absolute;
  right: 4px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--rojo);
  line-height: 1;
}
.faq details[open] summary::after { content: '–'; }
.faq__r { padding: 0 40px 20px 0; color: var(--gris-osc); }

/* ---------- Formulario ---------- */
.form-inscripcion { display: grid; gap: 18px; }
.campo { display: grid; gap: 7px; }
.campo--doble { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.campo label {
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gris);
}
.campo input, .campo select, .campo textarea {
  width: 100%;
  background: var(--negro);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  color: var(--blanco);
  font-family: var(--texto);
  font-size: 1rem;
  padding: 13px 15px;
  transition: border-color var(--transicion);
}
.campo textarea { resize: vertical; min-height: 110px; }
.campo input:focus, .campo select:focus, .campo textarea:focus {
  outline: none;
  border-color: var(--rojo);
}
.campo input::placeholder, .campo textarea::placeholder { color: #666; }
.campo select { appearance: none; cursor: pointer; }
.campo--select { position: relative; }
.campo--select::after {
  content: '';
  position: absolute;
  right: 16px; bottom: 20px;
  width: 8px; height: 8px;
  border-right: 2px solid var(--gris);
  border-bottom: 2px solid var(--gris);
  transform: rotate(45deg);
  pointer-events: none;
}
.acepto {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: .85rem;
  color: var(--gris);
  line-height: 1.5;
}
.acepto input { width: 18px; height: 18px; flex: none; margin-top: 3px; accent-color: var(--rojo); }
.form-estado { font-size: .92rem; padding: 14px 16px; border-radius: var(--radio); display: none; }
.form-estado.ok { display: block; background: rgba(74,222,128,.12); border: 1px solid #4ADE80; color: #4ADE80; }
.form-estado.error { display: block; background: rgba(221,51,48,.12); border: 1px solid var(--rojo); color: var(--rojo-claro); }

/* ---------- WhatsApp flotante ---------- */
.wa-flotante {
  position: fixed;
  right: 20px;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  z-index: 90;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: #25D366;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 26px rgba(0,0,0,.45);
  transition: var(--transicion);
}
.wa-flotante:hover { transform: scale(1.08); }
.wa-flotante svg { width: 30px; height: 30px; fill: #fff; }

/* ---------- Footer ---------- */
.footer { background: var(--negro); border-top: 1px solid var(--borde); padding-block: 56px 28px; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--borde);
}
.footer__marca img { width: 190px; margin-bottom: 18px; }
.footer p { color: var(--gris); font-size: .93rem; }
.footer h5 {
  font-family: var(--display);
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 0 0 16px;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer ul a { color: var(--gris); font-size: .93rem; transition: color var(--transicion); }
.footer ul a:hover { color: var(--rojo); }
.footer__legal {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  font-size: .8rem;
  color: var(--gris-osc);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* ---------- Animación de entrada ---------- */
.revelar { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.revelar.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .revelar { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .instructor { grid-template-columns: 1fr; gap: 28px; }
  .instructor__foto { max-width: 220px; }
  .precio-caja { position: static; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__marca { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  :root { --header-h: 64px; }
  .menu-btn { display: flex; }
  .header .btn { display: none; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(13,13,13,.99);
    border-bottom: 1px solid var(--borde);
    padding: 12px 20px 26px;
    margin: 0;
    transform: translateY(-120%);
    transition: transform var(--transicion);
    max-height: calc(100svh - var(--header-h));
    overflow-y: auto;
  }
  .nav.abierto { transform: none; }
  .nav a { padding: 15px 0; border-bottom: 1px solid var(--borde); font-size: .9rem; }
  .nav a::after { display: none; }
  .nav .btn { display: inline-flex; margin-top: 18px; }
  .marca img { width: 132px; }
  .marca__pais { font-size: 1rem; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 64px); padding-bottom: 64px; }
  .hero__acciones .btn { width: 100%; }
  .hero__datos { gap: 18px 28px; }
  .dato__num { font-size: 1.7rem; }
  .modulo summary { padding: 18px; gap: 12px; }
  .modulo__num { width: 34px; font-size: 1.5rem; }
  .modulo__titulo { font-size: 1.2rem; }
  .modulo__cuerpo { padding: 0 18px 22px 18px; }
  .precio-caja { padding: 26px; }
  .precio-caja__monto { font-size: 2.6rem; }
  .campo--doble { grid-template-columns: 1fr; }
  .cohorte { padding: 18px; }
  .cohorte__acciones { margin-left: 0; width: 100%; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .bloque { padding: 24px; }
}