/* ============================================================
   Esferion — Landing
   Tokens, base, componentes. Mobile-first.
   ============================================================ */

:root {
  /* Colores */
  --color-bg-dark: #131313;          /* CTA inset / footer ref. del diseño */
  --color-heading: #050A0E;          /* titulares */
  --color-text: #050A0EBF;           /* texto cuerpo (75%) */
  --color-muted: #050A0E66;          /* texto auxiliar (40%) */
  --color-border: #050A0E33;         /* bordes de componentes (20%) */
  --color-on-dark: #ffffff;          /* texto/bordes sobre oscuro */
  --color-on-dark-muted: #FFFFFF66;  /* CTA secundario (blanco 40%) */
  --color-surface: #ffffff;          /* fondo página */

  /* Tipografía */
  --font-head: 'Besley', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  /* Tamaños fluidos (desktop entre paréntesis) */
  --fs-h1: clamp(2.75rem, 8vw, 6rem);      /* 96px */
  --fs-h2: clamp(2rem, 5vw, 3.5rem);       /* 56px */
  --fs-h3: 1.375rem;                       /* 22px */
  --fs-body: 1.25rem;                      /* 20px */
  --fs-small: 1rem;                        /* 16px */

  /* Radios */
  --radius: 16px;        /* tarjetas / contenedores */
  --radius-btn: 20px;    /* botones / CTAs */

  /* Espaciado */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 7.5rem;

  --container-max: 1920px;
  --gutter: clamp(1.25rem, 6.25vw, 7.5rem); /* 20px → 120px */
  --section-gap: clamp(3.5rem, 9vw, 7.5rem);
}

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

* { margin: 0; }

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

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--font-head);
  color: var(--color-heading);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

p { text-wrap: pretty; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  background: var(--color-heading);
  color: var(--color-on-dark);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-btn);
  font-size: var(--fs-small);
  transition: top 0.2s ease;
}
.skip-link:focus { top: var(--space-4); }

/* ---------- Botones / CTAs ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease,
              border-color 0.2s ease, opacity 0.2s ease;
}

.btn--primary {
  background: transparent;
  border-color: var(--color-on-dark);
  color: var(--color-on-dark);
}
.btn--primary:hover { background: rgba(255, 255, 255, 0.12); }

.btn--secondary {
  background: transparent;
  border-color: var(--color-on-dark-muted);
  color: var(--color-on-dark-muted);
}
.btn--secondary:hover {
  border-color: var(--color-on-dark);
  color: var(--color-on-dark);
}

.btn--tertiary {
  background: var(--color-on-dark);
  border-color: var(--color-on-dark);
  color: var(--color-heading);
}
.btn--tertiary:hover { opacity: 0.85; }

/* Foco accesible (sobre oscuro) */
.btn:focus-visible,
.nav__link:focus-visible,
.hero__cue:focus-visible {
  outline: 2px solid var(--color-on-dark);
  outline-offset: 3px;
}

/* ============================================================
   Masthead (nav + héroe). Variantes según contexto:
   - .masthead--dark → landing, sobre héroe oscuro.
   - .masthead--light → blog (listado y ficha), sobre fondo claro.
   ============================================================ */
.masthead { position: relative; }

.masthead--dark {
  background-color: #050A0E;
  background-image:
    linear-gradient(180deg, rgba(5, 10, 14, 0.65) 0%, rgba(5, 10, 14, 0.15) 28%),
    linear-gradient(90deg, rgba(5, 10, 14, 0.8) 0%, rgba(5, 10, 14, 0.35) 55%, rgba(5, 10, 14, 0.15) 100%),
    url("images/Rectangle.jpg");
  background-size: cover;
  background-position: center;
  color: var(--color-on-dark);
}

.masthead--light {
  background: var(--color-surface);
  color: var(--color-heading);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

/* Nav adapta colores según el masthead que lo contiene */
.masthead--light .nav__logo,
.masthead--light .nav__link { color: var(--color-heading); }

.masthead--light .btn--primary {
  border-color: var(--color-heading);
  color: var(--color-heading);
}
.masthead--light .btn--primary:hover { background: rgba(5, 10, 14, 0.06); }

.masthead--light .btn--tertiary {
  background: var(--color-heading);
  border-color: var(--color-heading);
  color: var(--color-on-dark);
}
.masthead--light .btn--tertiary:hover { opacity: 0.85; }

.masthead--light .nav__link:focus-visible,
.masthead--light .btn:focus-visible {
  outline-color: var(--color-heading);
}

.masthead__inner {
  display: flex;
  flex-direction: column;
  min-height: clamp(560px, 92vh, 880px);
  padding-block: var(--space-6) var(--space-7);
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
  width: 100%;          /* asegura que el menú interno tenga ancho del contenedor */
  min-width: 0;         /* permite que sus hijos se reduzcan/envuelvan correctamente */
}

.nav__logo {
  font-family: var(--font-head);
  font-size: 3rem; /* 48px */
  font-weight: 500;
  color: var(--color-on-dark);
  letter-spacing: -0.01em;
}

.nav__menu {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  width: 100%;
}

.nav__link {
  font-size: var(--fs-small);
  color: var(--color-on-dark);
  padding-block: var(--space-2);
  transition: opacity 0.2s ease;
}
.nav__link:hover { opacity: 0.7; text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Héroe ---------- */
.hero {
  margin-top: clamp(2.5rem, 10vh, 6rem);
  max-width: 56rem;
}

.hero__title {
  font-size: var(--fs-h1);
  color: var(--color-on-dark);
  margin-bottom: var(--space-5);
}

.hero__lead {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.85);
  max-width: 38rem;
  margin-bottom: var(--space-6);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero__cue {
  margin-top: auto;
  padding-top: var(--space-7);
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}
.hero__cue:hover { color: var(--color-on-dark); }
.hero__cue-arrow { margin-right: var(--space-2); }

/* ============================================================
   Secciones de contenido (patrón 2 columnas)
   ============================================================ */
.section {
  padding-block: var(--section-gap);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5) var(--space-6);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section__eyebrow {
  font-size: var(--fs-small);
  color: var(--color-text);
}

.section__title {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-5);
}

.section__intro {
  font-size: var(--fs-body);
  color: var(--color-text);
  max-width: 40rem;
  margin-bottom: var(--space-7);
}

/* ---------- Tarjetas ---------- */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 13rem;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.card__num {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--color-muted);
  margin-bottom: auto;
}

.card__icon {
  display: block;
  color: var(--color-heading);
  margin-bottom: auto;
}
.card__icon svg { width: 32px; height: 32px; }

.card__title {
  font-size: var(--fs-h3);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.card__text {
  font-size: var(--fs-small);
  color: var(--color-text);
  line-height: 1.5;
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  padding-block: var(--space-7) var(--space-9);
}

.cta__box {
  background: var(--color-bg-dark);
  color: var(--color-on-dark);
  border-radius: var(--radius);
  padding: clamp(3rem, 8vw, 6rem) var(--space-5);
  text-align: center;
}

.cta__title {
  font-size: var(--fs-h2);
  color: var(--color-on-dark);
  margin-bottom: var(--space-4);
}

.cta__text {
  font-size: var(--fs-body);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-6);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4) var(--space-6);
}

.footer__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-5);
}

.footer__logo {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-heading);
}

.footer__copy,
.footer__note {
  font-size: var(--fs-small);
  color: var(--color-muted);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
}

.footer__link {
  font-size: var(--fs-small);
  color: var(--color-heading);
  transition: opacity 0.2s ease;
}
.footer__link:hover { opacity: 0.6; text-decoration: underline; text-underline-offset: 4px; }

.footer__link:focus-visible,
.footer__logo:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 3px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (min-width: 640px) {
  .cards--2,
  .cards--3 { grid-template-columns: repeat(2, 1fr); }

  /* Menú de nav en fila a partir de móvil grande */
  .nav__menu {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
  }
}

@media (min-width: 960px) {
  /* Nav en una fila: logo izq., menú der. */
  .nav {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .nav__menu { width: auto; gap: var(--space-5); }

  /* Secciones a dos columnas: eyebrow | contenido */
  .section {
    grid-template-columns: clamp(8rem, 17%, 15rem) 1fr;
    column-gap: clamp(2rem, 4vw, 4rem);
  }

  .cards--3 { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   Blog — Listado
   ============================================================ */
.blog-list { padding-top: var(--space-6); }

.post-grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7) var(--space-5);
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: inherit;
  transition: opacity 0.2s ease;
}
.post-card:hover { opacity: 0.85; }
.post-card:hover .post-card__title { text-decoration: underline; text-underline-offset: 4px; }
.post-card:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 4px;
  border-radius: var(--radius);
}

.post-card__media {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-border);
}
.post-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-card__date {
  font-size: var(--fs-small);
  color: var(--color-muted);
  margin-top: var(--space-2);
}

.post-card__title {
  font-family: var(--font-head);
  font-size: var(--fs-h3);
  color: var(--color-heading);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.post-card__text {
  font-size: var(--fs-small);
  color: var(--color-text);
  line-height: 1.5;
}

/* Paginación */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.pagination__dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-size: var(--fs-small);
  color: var(--color-muted);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.pagination__dot:hover { background: rgba(5, 10, 14, 0.06); color: var(--color-heading); }
.pagination__dot:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 2px;
}
.pagination__dot--active {
  background: var(--color-heading);
  color: var(--color-on-dark);
}
.pagination__dot--active:hover { background: var(--color-heading); color: var(--color-on-dark); }

/* ============================================================
   Blog — Ficha (artículo)
   ============================================================ */
.article { padding-block: var(--space-7) var(--space-8); }

.article__header {
  max-width: 56rem;
  margin-bottom: var(--space-7);
}

.article__title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  margin-bottom: var(--space-4);
}

.article__subtitle {
  font-size: var(--fs-small);
  color: var(--color-text);
  max-width: 36rem;
  margin-bottom: var(--space-5);
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}
.article__meta li { position: relative; padding-right: var(--space-4); }
.article__meta li + li::before {
  content: "•";
  position: absolute;
  left: calc(var(--space-4) * -1 + 4px);
  color: var(--color-muted);
}

.article__hero {
  margin: 0 0 var(--space-8);
  border-radius: var(--radius);
  overflow: hidden;
}
.article__hero img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Wrapper que mete el cuerpo del artículo en la columna derecha (mismo
   grid que .section: eyebrow ~12rem | contenido 1fr). En móvil, una columna. */
.article__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5) var(--space-6);
}

.article__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.article__content > * + * { margin-top: var(--space-5); }
.article__content h2 {
  font-size: 1.75rem;
  margin-top: var(--space-7);
  margin-bottom: var(--space-3);
}
.article__content h2:first-of-type { margin-top: var(--space-6); }
.article__content p {
  font-size: var(--fs-small);
  color: var(--color-text);
  line-height: 1.7;
}
.article__lede {
  font-size: var(--fs-body) !important;
  color: var(--color-heading) !important;
}

.article__quote {
  margin-top: var(--space-7);
  padding-left: var(--space-5);
  border-left: 3px solid var(--color-heading);
}
.article__quote p {
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  color: var(--color-heading);
  line-height: 1.3;
}

/* Sidebar de compartir */
.article__share {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  order: -1; /* aparece encima del contenido en mobile */
}
.article__share-label {
  font-size: var(--fs-small);
  color: var(--color-muted);
}
.share-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.share-list__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-heading);
  font: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.share-list__item:hover {
  background: var(--color-heading);
  color: var(--color-on-dark);
  border-color: var(--color-heading);
}
.share-list__item:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 2px;
}

/* Toast pequeño para feedback de "Copiar enlace" */
.share-list__toast {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 10px;
  background: var(--color-heading);
  color: var(--color-on-dark);
  border-radius: var(--radius-btn);
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.share-list__item[data-copied="true"] .share-list__toast { opacity: 1; }

/* Artículos relacionados — mismo grid eyebrow|contenido que .section */
.related {
  padding-top: var(--space-9);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5) var(--space-6);
}

.related__eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--color-muted);
  font-weight: 400;
  letter-spacing: 0;
  margin-bottom: 0;
}

.related__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.related__grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.related__card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  height: 100%;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.related__card:hover { border-color: var(--color-heading); }
.related__card:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 2px;
}

.related__card-title {
  font-size: 1.125rem;
  color: var(--color-heading);
  line-height: 1.3;
  flex-grow: 1;
}

.related__card-date {
  font-size: var(--fs-small);
  color: var(--color-muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-7);
  font-size: var(--fs-small);
  color: var(--color-heading);
  transition: opacity 0.2s ease;
}
.back-link:hover { opacity: 0.7; text-decoration: underline; text-underline-offset: 4px; }
.back-link:focus-visible {
  outline: 2px solid var(--color-heading);
  outline-offset: 3px;
}

/* ---------- Responsive: blog y artículo ---------- */
@media (min-width: 640px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .related__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .post-grid { grid-template-columns: repeat(3, 1fr); column-gap: var(--space-6); }
  .related__grid { grid-template-columns: repeat(3, 1fr); }

  /* Mismo grid que .section: eyebrow ~12rem | contenido 1fr */
  .article__body,
  .related {
    grid-template-columns: clamp(8rem, 17%, 15rem) 1fr;
    column-gap: clamp(2rem, 4vw, 4rem);
  }
  /* article__body solo tiene un hijo (el layout): lo empujamos a col 2 */
  .article__body > * { grid-column: 2; }

  .article__layout {
    grid-template-columns: minmax(0, 1fr) 12rem;
    column-gap: var(--space-7);
  }
  .article__share {
    order: 0;
    position: sticky;
    top: var(--space-5);
    align-self: start;
  }
}