/* ==========================
   Variables (cambia colores aquí)
   ========================== */
:root {
  --fondo: #ffffff;
  --texto: #1f2023;
  --titulo: #1c2741;   /* azul marino del título grande */
  --rojo: #df2227;     /* títulos de sección, "Saber más" y resaltados */
  --azul: #14263c;     /* bandas azules (índice y cierre) */
  --linea: #d9d9d9;    /* líneas divisorias */
  --barra: #1c2741;    /* barra superior */
  --ancho: 1100px;     /* ancho máximo del contenido */
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: "Poppins", Arial, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  background: #eef2f5; /* se ve si falta alguna imagen */
}

p {
  margin: 0 0 18px;
}

.contenedor {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================
   Barra superior
   ========================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--barra);
  color: #e8e8e6;
}

.topbar__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
}

.topbar__nav {
  display: flex;
  gap: 22px;
  margin-right: auto;
}

.topbar__nav a {
  color: #fbfbf9;
  font-size: 13px;
  text-decoration: none;
  opacity: 0.8;
}

.topbar__nav a:hover,
.topbar__nav a:focus-visible {
  opacity: 1;
  text-decoration: underline;
}

.search input {
  width: 200px;
  max-width: 100%;
  padding: 6px 14px;
  border: 0;
  border-radius: 999px;
  background: #e8e8e6;
  color: #de2026;
  font: poppins medium;
  font-size: 13px;
}

.search input::placeholder {
  color: #b5b5b5;
}

.search input:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* ==========================
   Portada
   ========================== */
.hero {
  padding: 56px 0 64px;
}

h1 {
  margin: 0 0 72px;
  color: var(--titulo);
  font-size: clamp(34px, 8vw, 80px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-align: center;
  text-transform: uppercase;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 365px) 1fr;
  gap: 64px;
  align-items: center;
}

.hero__img {
  width: 100%;
}

.hero__texto {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 56px;
  text-align: center;
}

.hero__pregunta {
  max-width: 44ch;
  margin: 0;
  color: var(--titulo);
  font-size: 15px;
  font-weight: 600;
}

/* Botón "Saber más" (se ve como enlace) */
.saber-mas {
  padding: 6px 4px;
  border: 0;
  background: none;
  color: var(--rojo);
  font: poppins;
  font-size: 20px;
  font-style: semobold;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
}

.saber-mas:hover {
  text-decoration: underline;
}

.saber-mas:focus-visible {
  outline: 2px solid var(--rojo);
  outline-offset: 3px;
}

/* ==========================
   Desplegable
   ========================== */
.desplegable {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.6s ease, visibility 0s linear 0.6s;
}

.desplegable.abierto {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.6s ease, visibility 0s;
}

.desplegable__interior {
  min-height: 0;
  overflow: hidden;
}

.desplegable.sin-animacion {
  transition: none;
}

/* ==========================
   Introducción
   ========================== */
.intro {
  padding-top: 8px;
  padding-bottom: 32px;
}

/* ==========================
   Índice (banda azul)
   ========================== */
.indice {
  background: var(--azul);
  color: #ffffff;
  padding: 28px 0 32px;
}

.indice h2 {
  margin: 0 0 10px;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.indice ol {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 2;
}

.indice li {
  margin: 0;
}

.indice a {
  display: inline-block;
  color: #ffffff;
  text-decoration: none;
}

.indice a span {
  margin-right: 4px;
}

.indice a:hover,
.indice a:focus-visible {
  text-decoration: underline;
}

/* ==========================
   Secciones
   ========================== */
.linea {
  margin: 0;
  border: 0;
  border-top: 1px solid var(--linea);
}

.tema {
  padding: 44px 0;
}

.tema h2 {
  margin: 0 0 12px;
  color: var(--rojo);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.tema--imagen {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 48px;
  align-items: start;
}

.tema__figura {
  display: flex;
  justify-content: center;
  margin: 0;
}

.tema__figura img {
  width: 100%;
  max-width: 240px;
}

.resaltado {
  color: var(--rojo);
  font-weight: 700;
}

ul,
ol {
  margin: 0 0 14px;
  padding-left: 22px;
}

li {
  margin-bottom: 6px;
}

ul ul {
  margin: 6px 0 0;
}

/* Banner de la laptop */
.banner {
  margin-top: 20px; margin-bottom: 48px;
}

.banner img {
  width: 100%;
  min-height: 120px;
}

/* ==========================
   Cierre (banda azul)
   ========================== */
.cta {
  display: block;
  padding: 44px 24px;
  background: var(--azul);
  color: #fbfbf9;
  text-align: center;
  text-decoration: none;
}

.cta h2 {
  margin: 0;
  color: #ffffff;
  font-size: poppins(20px, 3.5vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  text-transform: uppercase;
}

/* ==========================
   Celular y tableta
   ========================== */
@media (max-width: 760px) {
  .topbar__inner {
    flex-wrap: wrap;
    gap: 10px 18px;
  }

  .topbar__nav {
    order: 3;
    width: 100%;
    margin-right: 0;
  }

  .search {
    margin-left: auto;
  }

  .search input {
    width: 140px;
  }

  .hero {
    padding-top: 36px;
  }

  h1 {
    margin-bottom: 40px;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero__img {
    max-width: 365px;
    margin: 0 auto;
  }

  .hero__texto {
    gap: 28px;
  }

  .tema {
    padding: 32px 0;
  }

  .tema--imagen {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .desplegable,
  .desplegable.abierto {
    transition: none;
  }
}