/* ==========================================================================
   DESTINOS AMÉRICA — base.css
   Estilos compartidos por TODAS las páginas.

   Paleta corporativa tomada del manual de marca:
     #1E3A47  Azul petróleo  — sobriedad, confianza, autoridad
     #B59368  Dorado mate    — elegancia, valor, distinción
     #2F3438  Gris carbón    — lectura limpia en textos pequeños
     #FFFFFF  Blanco puro    — fondo

   Tipografías según el manual: Tenor Sans (título, sans humanista de trazo
   fino) y Playfair Display / Cinzel (subtítulos serif con mucho tracking).
   ========================================================================== */

/* ---------- Variables ---------- */
:root {
  --petroleo: #1e3a47;
  --petroleo-hondo: #14282f;
  --petroleo-claro: #2c5567;
  --dorado: #b59368;          /* decorativo: líneas, rombos, bordes */
  --dorado-texto: #8a6d42;    /* dorado oscurecido para TEXTO sobre fondo claro
                                 (#b59368 sobre blanco da 2.86:1 y no cumple
                                 el mínimo de 4.5:1; este da 4.83:1) */
  --dorado-claro: #d8c3a3;    /* para texto sobre fondos oscuros: 7:1 */
  --carbon: #2f3438;
  --blanco: #ffffff;
  --marfil: #faf8f5;
  --arena: #f2ece4;
  --texto: #4d565b;
  --texto-claro: rgba(255, 255, 255, 0.88);
  --borde: #e6ded2;
  --error: #a4342a;
  --exito: #2f6b4f;

  --fuente-titulos: 'Tenor Sans', 'Optima', 'Segoe UI', sans-serif;
  --fuente-serif: 'Playfair Display', Georgia, serif;
  --fuente-detalle: 'Cinzel', Georgia, serif;
  --fuente-cuerpo: 'Lato', 'Segoe UI', sans-serif;

  --contenedor: 1240px;
  --radio: 2px;
  --sombra: 0 30px 70px rgba(30, 58, 71, 0.13);
  --sombra-suave: 0 14px 40px rgba(30, 58, 71, 0.08);
  --transicion: 0.4s cubic-bezier(0.22, 0.7, 0.3, 1);
  --alto-header: 96px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--fuente-cuerpo);
  color: var(--texto);
  background: var(--blanco);
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--fuente-titulos);
  color: var(--petroleo);
  line-height: 1.24;
  font-weight: 400;
  letter-spacing: 0.01em;
}

a:focus-visible, button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--dorado);
  outline-offset: 4px;
}

/* ==========================================================================
   PANTALLA DE CARGA
   Se muestra solo la PRIMERA vez que se entra al sitio en la sesión.
   El JS marca una bandera en sessionStorage; al navegar entre páginas ya no
   vuelve a aparecer. Si el navegador bloquea sessionStorage, se muestra
   igualmente y se oculta a los pocos segundos: nunca deja la web tapada.
   ========================================================================== */
.carga {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--blanco);
  display: grid;
  place-items: center;
  transition: opacity 0.9s ease, visibility 0.9s ease;
}

.carga--oculta {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.carga__inner {
  text-align: center;
  padding: 30px;
  max-width: 560px;
}

.carga__logo {
  width: min(420px, 74vw);
  margin: 0 auto 34px;
  opacity: 0;
  transform: translateY(16px);
  animation: carga-entrar 1.3s cubic-bezier(0.22, 0.7, 0.3, 1) 0.15s forwards;
}

@keyframes carga-entrar {
  to { opacity: 1; transform: translateY(0); }
}

/* Línea dorada que se dibuja de centro hacia afuera, como en el logo */
.carga__linea {
  position: relative;
  height: 1px;
  width: min(360px, 68vw);
  margin: 0 auto 26px;
  background: var(--borde);
  overflow: hidden;
}

.carga__linea::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--dorado);
  transform: scaleX(0);
  transform-origin: center;
  animation: carga-linea 1.9s cubic-bezier(0.6, 0, 0.2, 1) 0.5s forwards;
}

@keyframes carga-linea {
  to { transform: scaleX(1); }
}

/* Rombo dorado del logo, latiendo suavemente */
.carga__rombo {
  width: 9px;
  height: 9px;
  margin: 0 auto 22px;
  background: var(--dorado);
  transform: rotate(45deg);
  animation: carga-rombo 1.8s ease-in-out infinite;
}

@keyframes carga-rombo {
  0%, 100% { opacity: 1; transform: rotate(45deg) scale(1); }
  50%      { opacity: 0.35; transform: rotate(45deg) scale(0.75); }
}

.carga__claim {
  font-family: var(--fuente-detalle);
  font-size: clamp(0.72rem, 1.6vw, 0.86rem);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dorado-texto);
  opacity: 0;
  animation: carga-entrar 1.2s ease 0.9s forwards;
}

/* ---------- Utilidades ---------- */
.contenedor { width: min(var(--contenedor), 90%); margin-inline: auto; }
.seccion { padding: 130px 0; }

/* Antetítulo serif con mucho interletrado, como el logo */
.etiqueta {
  display: inline-block;
  font-family: var(--fuente-detalle);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--dorado-texto);
  margin-bottom: 22px;
}

.titulo-seccion {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  margin-bottom: 24px;
}

/* Separador con rombo, tomado del logotipo */
.separador {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 0 auto 34px;
  max-width: 340px;
}

.separador::before,
.separador::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--dorado));
}

.separador::after { background: linear-gradient(90deg, var(--dorado), transparent); }

.separador span {
  width: 7px; height: 7px;
  background: var(--dorado);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.separador--izq { margin-left: 0; justify-content: flex-start; max-width: 190px; }
.separador--izq::before { display: none; }

.encabezado-centro {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 76px;
}

.solo-lectores {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Animaciones de entrada ---------- */
[data-animar] {
  opacity: 0;
  transition: opacity 1.1s ease, transform 1.1s cubic-bezier(0.22, 0.7, 0.3, 1);
  transform: translateY(30px);
}

[data-animar="izq"]  { transform: translateX(-44px); }
[data-animar="der"]  { transform: translateX(44px); }
[data-animar="zoom"] { transform: scale(0.95); }

[data-animar].visible { opacity: 1; transform: none; }

/* Revelado de imagen con cortina dorada */
.revelar { position: relative; overflow: hidden; }

.revelar::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--dorado);
  transform: scaleX(1);
  transform-origin: right;
  transition: transform 1.25s cubic-bezier(0.76, 0, 0.24, 1);
  z-index: 2;
}

.revelar.visible::after { transform: scaleX(0); }

.revelar img {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.1);
  transition: transform 1.9s cubic-bezier(0.22, 0.7, 0.3, 1);
}

.revelar.visible img { transform: scale(1); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 42px;
  border-radius: var(--radio);
  font-family: var(--fuente-detalle);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: var(--transicion);
  cursor: pointer;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--petroleo-hondo);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transicion);
  z-index: 0;
}

.btn:hover::before { transform: scaleX(1); }
.btn > * { position: relative; z-index: 1; }

.btn__flecha { display: inline-block; transition: transform var(--transicion); }
.btn:hover .btn__flecha { transform: translateX(7px); }

.btn-dorado { background: var(--dorado-texto); color: var(--blanco); }
.btn-dorado:hover { color: var(--blanco); }

.btn-petroleo { background: var(--petroleo); color: var(--blanco); }

.btn-linea {
  background: transparent;
  color: var(--blanco);
  border-color: rgba(255, 255, 255, 0.4);
}
.btn-linea:hover { border-color: var(--petroleo-hondo); }

.btn-linea-oscuro {
  background: transparent;
  color: var(--petroleo);
  border-color: var(--dorado-texto);
}
.btn-linea-oscuro:hover { color: var(--blanco); }

/* Enlace con subrayado que crece */
.enlace-sutil {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--fuente-detalle);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dorado-texto);
  position: relative;
  padding-bottom: 6px;
}

.enlace-sutil::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--dorado-texto);
  transition: width var(--transicion);
}

.enlace-sutil:hover::after { width: 100%; }
.enlace-sutil:hover .btn__flecha { transform: translateX(7px); }

/* ==========================================================================
   HEADER
   ========================================================================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: transparent;
  transition: background var(--transicion), box-shadow var(--transicion);
}

.header--solido {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--borde);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--alto-header);
  gap: 24px;
}

.header__logo img {
  height: 62px;
  width: auto;
  transition: var(--transicion);
}

/* Sobre el hero oscuro el logo se invierte a blanco */
.header:not(.header--solido) .header__logo img {
  filter: brightness(0) invert(1);
}

.header--solido .header__logo img { height: 54px; }

.header__derecha { display: flex; align-items: center; gap: 40px; }

.nav__lista { display: flex; gap: 38px; align-items: center; }

.nav__enlace {
  font-family: var(--fuente-detalle);
  color: var(--blanco);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 8px 0;
  position: relative;
  transition: var(--transicion);
  text-shadow: 0 1px 14px rgba(20, 40, 47, 0.5);
}

.nav__enlace::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--dorado-texto);
  transition: width var(--transicion);
}

.nav__enlace:hover::after,
.nav__enlace--activo::after { width: 100%; }

.header--solido .nav__enlace { color: var(--petroleo); text-shadow: none; }
.header--solido .nav__enlace:hover,
.header--solido .nav__enlace--activo { color: var(--petroleo); }

.header__cta { padding: 14px 30px; font-size: 0.74rem; }

/* Hamburguesa */
.header__hamburguesa {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 46px; height: 46px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 7px;
}

.header__hamburguesa span {
  display: block;
  width: 26px; height: 1px;
  background: var(--blanco);
  transition: var(--transicion);
}

.header--solido .header__hamburguesa span { background: var(--petroleo); }

.header__hamburguesa--activa span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.header__hamburguesa--activa span:nth-child(2) { opacity: 0; }
.header__hamburguesa--activa span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ==========================================================================
   HERO DE PÁGINA INTERNA
   La foto de fondo se define en el CSS de cada página.
   ========================================================================== */
.hero-pagina {
  position: relative;
  background-color: var(--petroleo);
  background-size: cover;
  background-position: center;
  color: var(--blanco);
  padding: calc(var(--alto-header) + 130px) 0 130px;
  overflow: hidden;
  text-align: center;
}

.hero-pagina::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(20, 40, 47, 0.88) 0%,
    rgba(30, 58, 71, 0.78) 50%,
    rgba(20, 40, 47, 0.92) 100%);
}

.hero-pagina__contenido {
  position: relative;
  z-index: 3;
  max-width: 880px;
  margin-inline: auto;
}

.hero-pagina .etiqueta { color: var(--dorado-claro); }

.hero-pagina h1 {
  color: var(--blanco);
  font-size: clamp(2.2rem, 5.2vw, 3.6rem);
  margin-bottom: 24px;
}

.hero-pagina p {
  color: var(--texto-claro);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 30px;
}

.hero-pagina .separador::before { background: linear-gradient(90deg, transparent, var(--dorado-claro)); }
.hero-pagina .separador::after  { background: linear-gradient(90deg, var(--dorado-claro), transparent); }
.hero-pagina .separador span    { background: var(--dorado-claro); }

/* Bloque de artículo */
.articulo { padding: 120px 0; }
.articulo__inner { max-width: 860px; margin-inline: auto; }
.articulo p { font-size: 1.06rem; margin-bottom: 28px; }

/* ==========================================================================
   CTA FINAL
   ========================================================================== */
.cta-final {
  position: relative;
  background: var(--petroleo);
  text-align: center;
  overflow: hidden;
}

/* Trama sutil de meridianos, guiño al mapa del logotipo */
.cta-final::after {
  content: "";
  position: absolute;
  width: 620px; height: 620px;
  border: 1px solid rgba(181, 147, 104, 0.18);
  border-radius: 50%;
  top: -260px; right: -200px;
  pointer-events: none;
}

.cta-final__contenido { position: relative; z-index: 3; }

.cta-final .etiqueta { color: var(--dorado-claro); }

.cta-final h2 {
  color: var(--blanco);
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  max-width: 820px;
  margin: 0 auto 22px;
}

.cta-final p {
  color: var(--texto-claro);
  max-width: 640px;
  margin: 0 auto 42px;
}

.cta-final__botones {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-final .separador::before { background: linear-gradient(90deg, transparent, var(--dorado-claro)); }
.cta-final .separador::after  { background: linear-gradient(90deg, var(--dorado-claro), transparent); }
.cta-final .separador span    { background: var(--dorado-claro); }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--petroleo-hondo);
  color: rgba(255, 255, 255, 0.78);
  padding: 96px 0 0;
  font-size: 0.94rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
  gap: 64px;
  padding-bottom: 64px;
}

.footer__logo img {
  width: 260px;
  height: auto;
  margin-bottom: 26px;
  filter: brightness(0) invert(1);
  opacity: 0.94;
}

.footer__lema {
  font-family: var(--fuente-serif);
  font-style: italic;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--dorado-claro);
  max-width: 330px;
}

.footer h4 {
  font-family: var(--fuente-detalle);
  color: var(--blanco);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.footer__lista li { margin-bottom: 15px; }
.footer__lista a { transition: var(--transicion); }
.footer__lista a:hover { color: var(--dorado-claro); padding-left: 8px; }

.footer__contacto p { margin-bottom: 16px; line-height: 1.8; }
.footer__contacto a { color: var(--dorado-claro); transition: var(--transicion); }
.footer__contacto a:hover { color: var(--blanco); }

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 28px 0;
  text-align: center;
  font-family: var(--fuente-detalle);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- WhatsApp flotante ---------- */
.whatsapp {
  position: fixed;
  bottom: 30px; right: 30px;
  z-index: 150;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--petroleo);
  border: 1px solid var(--dorado-claro);
  color: var(--dorado-claro);
  display: grid; place-items: center;
  transition: var(--transicion);
  box-shadow: 0 12px 30px rgba(30, 58, 71, 0.3);
}

.whatsapp:hover {
  background: var(--dorado-texto);
  color: var(--blanco);
  transform: scale(1.08);
}

.whatsapp svg { width: 26px; height: 26px; fill: currentColor; }

/* ---------- Accesibilidad ---------- */
@media (prefers-reduced-motion: reduce) {
  [data-animar] { opacity: 1; transform: none; transition: none; }
  .revelar::after { display: none; }
  .revelar img { transform: none; transition: none; }
  .carga__logo, .carga__linea::after, .carga__claim, .carga__rombo { animation: none; opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 48px; }
}

@media (max-width: 900px) {
  .seccion { padding: 84px 0; }

  /* En móvil el header es siempre claro */
  .header { background: rgba(255, 255, 255, 0.97); backdrop-filter: blur(16px); box-shadow: 0 1px 0 var(--borde); }
  .header .header__logo img { filter: none; height: 48px; }
  .header .nav__enlace { color: var(--petroleo); text-shadow: none; }
  .header .header__hamburguesa span { background: var(--petroleo); }

  .header__hamburguesa { display: flex; }
  .header__cta { display: none; }
  .header__derecha { gap: 0; }

  .nav {
    position: absolute;
    top: var(--alto-header);
    left: 0; right: 0;
    background: var(--blanco);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease;
    border-bottom: 1px solid var(--borde);
    box-shadow: var(--sombra-suave);
  }

  .nav--abierto { max-height: 460px; }

  .nav__lista { flex-direction: column; gap: 0; padding: 18px 0 30px; }
  .nav__lista li { width: 100%; text-align: center; }
  .nav__enlace { display: block; padding: 16px 0; }
  .nav__enlace::after { display: none; }

  .hero-pagina { padding: calc(var(--alto-header) + 84px) 0 90px; }
  .articulo { padding: 80px 0; }
  .encabezado-centro { margin-bottom: 50px; }
}

@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; gap: 44px; }
  .btn { padding: 16px 28px; font-size: 0.74rem; letter-spacing: 0.14em; }
}