/* ============================================================
   GT BLOG — hoja de estilos (comparte el lenguaje visual de GT SHOP)
   ============================================================ */

:root {
  --zinc-50:  #fafafa;
  --zinc-100: #f4f4f5;
  --zinc-200: #e4e4e7;
  --zinc-300: #d4d4d8;
  --zinc-400: #a1a1aa;
  --zinc-500: #71717a;
  --zinc-600: #52525b;
  --zinc-700: #3f3f46;
  --zinc-800: #27272a;
  --zinc-900: #18181b;
  --naranja-600: #ea580c;
  --naranja-700: #c2410c;
  --teal-600: #0d9488;
  --radio: 12px;
  --ancho-max: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #fff;
  color: var(--zinc-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; padding: 0; }
a { color: inherit; text-decoration: none; }

/* ---------------------------- Cabecera ---------------------------- */
.cabecera {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--zinc-200);
}

.cabecera__interior {
  max-width: var(--ancho-max);
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 16px;
}
@media (min-width: 640px) { .cabecera__interior { padding: 0 24px; } }
@media (min-width: 1024px) { .cabecera__interior { padding: 0 32px; } }

.logo { display: flex; align-items: center; gap: 8px; }
.logo__marca { width: 28px; height: 28px; color: var(--zinc-900); }
.logo__texto { font-size: 22px; font-weight: 700; letter-spacing: -.02em; color: var(--zinc-900); }
.logo__sufijo { font-size: 15px; color: var(--zinc-500); font-weight: 500; margin-left: 2px; }

.nav-principal { display: none; align-items: center; gap: 22px; }
@media (min-width: 768px) { .nav-principal { display: flex; } }

.nav-enlace { font-size: 15px; color: var(--zinc-800); transition: color .15s ease; }
.nav-enlace:hover { color: var(--naranja-700); }
.nav-enlace.activo { font-weight: 600; color: var(--naranja-600); }

.cabecera__derecha { margin-left: auto; display: flex; align-items: center; }

.btn-primario {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--zinc-900);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  transition: background-color .15s ease;
}
.btn-primario:hover { background: var(--zinc-800); }
.btn-primario svg { width: 16px; height: 16px; }

.btn-secundario {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--zinc-300);
  border-radius: 8px;
  background: #fff;
  color: var(--zinc-700);
  font-size: 15px;
  font-weight: 500;
  transition: border-color .15s ease, background-color .15s ease;
}
.btn-secundario:hover { border-color: var(--zinc-900); background: var(--zinc-50); }

/* ----------------------------- Héroe ----------------------------- */
.heroe {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
@media (min-width: 768px) { .heroe { min-height: 420px; } }

.heroe__fondo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.heroe__contenido {
  position: relative;
  width: 100%;
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 40px 16px;
  color: #fff;
  background: linear-gradient(180deg, rgba(9, 9, 11, 0) 0%, rgba(9, 9, 11, .82) 78%);
}
@media (min-width: 640px) { .heroe__contenido { padding-left: 24px; padding-right: 24px; } }
@media (min-width: 1024px) { .heroe__contenido { padding-left: 32px; padding-right: 32px; } }

.heroe__etiqueta {
  margin: 0 0 8px;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--naranja-600);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.heroe__titulo { margin: 0 0 10px; font-size: 32px; font-weight: 700; letter-spacing: -.02em; line-height: 1.15; }
@media (min-width: 768px) { .heroe__titulo { font-size: 44px; } }

.heroe__texto { margin: 0; max-width: 560px; font-size: 16px; color: var(--zinc-200); }

/* ------------------------- Grilla de posts ------------------------ */
.contenedor {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 48px 16px 24px;
}
@media (min-width: 640px) { .contenedor { padding-left: 24px; padding-right: 24px; } }
@media (min-width: 1024px) { .contenedor { padding-left: 32px; padding-right: 32px; } }

.titulo-seccion { margin: 0 0 24px; font-size: 24px; font-weight: 700; letter-spacing: -.02em; }

.grilla-tarjetas {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 640px) { .grilla-tarjetas { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grilla-tarjetas { grid-template-columns: repeat(3, 1fr); } }

.tarjeta-post {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--zinc-200);
  border-radius: var(--radio);
  overflow: hidden;
  background: #fff;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.tarjeta-post:hover { box-shadow: 0 10px 28px rgba(0, 0, 0, .1); transform: translateY(-2px); border-color: var(--zinc-300); }

.tarjeta-post__marco { aspect-ratio: 16 / 10; overflow: hidden; background: var(--zinc-100); }
.tarjeta-post__marco img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.tarjeta-post:hover .tarjeta-post__marco img { transform: scale(1.04); }

.tarjeta-post__cuerpo { display: flex; flex-direction: column; gap: 8px; padding: 18px; flex: 1; }

.tarjeta-post__categoria {
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--teal-600);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

.tarjeta-post__titulo { margin: 0; font-size: 18px; font-weight: 700; line-height: 1.3; }

.tarjeta-post__resumen { margin: 0; font-size: 14px; color: var(--zinc-500); flex: 1; }

.tarjeta-post__meta { margin: 4px 0 0; font-size: 13px; color: var(--zinc-400); }

/* --------------------------- Artículos ---------------------------- */
.post {
  max-width: 760px;
  margin: 72px auto 0;
  scroll-margin-top: 90px;
}

.post__cabecera { text-align: center; }

.post__titulo { margin: 12px 0 8px; font-size: 30px; font-weight: 700; letter-spacing: -.02em; line-height: 1.2; }
@media (min-width: 640px) { .post__titulo { font-size: 36px; } }

.post__meta { margin: 0; font-size: 14px; color: var(--zinc-500); }

.post__portada {
  margin: 28px 0 8px;
  border-radius: var(--radio);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  background: var(--zinc-100);
}

.post__cuerpo { margin-top: 20px; font-size: 17px; line-height: 1.75; color: var(--zinc-800); }

.post__cuerpo p { margin: 0 0 20px; }

.post__cuerpo h3 {
  margin: 36px 0 14px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--zinc-900);
}

.post__cuerpo ul { margin: 0 0 20px; padding-left: 22px; }
.post__cuerpo li { margin-bottom: 10px; }
.post__cuerpo li strong { color: var(--zinc-900); }

.post__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0 8px;
  padding-top: 24px;
  border-top: 1px solid var(--zinc-200);
}

/* ------------------------------ Pie ------------------------------ */
.pie {
  margin-top: 80px;
  border-top: 1px solid var(--zinc-200);
  background: var(--zinc-50);
}

.pie__grid {
  max-width: var(--ancho-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 48px 16px;
}
@media (min-width: 640px) { .pie__grid { grid-template-columns: repeat(2, 1fr); padding-left: 24px; padding-right: 24px; } }
@media (min-width: 1024px) { .pie__grid { grid-template-columns: repeat(4, 1fr); padding-left: 32px; padding-right: 32px; } }

.pie__marca { display: flex; align-items: center; gap: 8px; color: var(--zinc-900); }
.pie__logo { width: 24px; height: 24px; }
.pie__nombre { font-size: 18px; font-weight: 700; letter-spacing: -.02em; }
.pie__sufijo { font-size: 14px; color: var(--zinc-500); font-weight: 500; }

.pie__descripcion { margin: 12px 0 0; max-width: 320px; font-size: 14px; line-height: 1.625; color: var(--zinc-500); }

.pie__titulo { margin: 0; font-size: 14px; font-weight: 700; color: var(--zinc-900); }

.pie__lista { list-style: none; margin: 12px 0 0; padding: 0; }
.pie__lista li { margin-bottom: 8px; }

.pie__enlace { font-size: 14px; color: var(--zinc-500); transition: color .15s ease; }
.pie__enlace:hover { color: var(--naranja-700); }

.pie__barra { border-top: 1px solid var(--zinc-200); }

.pie__barra-interior {
  max-width: var(--ancho-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 20px 16px;
  font-size: 12px;
  color: var(--zinc-500);
}
@media (min-width: 640px) { .pie__barra-interior { flex-direction: row; padding-left: 24px; padding-right: 24px; } }
@media (min-width: 1024px) { .pie__barra-interior { padding-left: 32px; padding-right: 32px; } }

.pie__barra-interior p { margin: 0; }

.pie__legal { display: flex; gap: 20px; }
.pie__legal a:hover { color: var(--zinc-900); }

/* Accesibilidad */
:focus-visible { outline: 2px solid var(--naranja-600); outline-offset: 2px; }

/* Animaciones y progreso de lectura */
.aparicion { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.aparicion.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .aparicion { opacity: 1; transform: none; transition: none; }
}

.progreso-lectura {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--naranja-600);
  z-index: 80;
  transition: width .1s linear;
}