/* ============================================================
   OCEANAVAL — Header, footer y componentes estructurales
   Sistema de marca: blanco-dominante, plano, sin glow/degradado.
   ============================================================ */

/* ---------- Loader de marca ---------- */
.loader {
  position: fixed; inset: 0; z-index: 1000;
  background: var(--c-white);
  display: grid; place-items: center;
  transition: opacity 0.6s var(--ease-out), visibility 0.6s;
}
.loader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.loader__inner { text-align: center; }
.loader__mark {
  font-family: var(--f-base); font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.25rem); letter-spacing: 0.06em;
  color: var(--c-ink); overflow: hidden;
}
.loader__bar {
  margin-top: 1.5rem; height: 2px; width: min(280px, 60vw);
  background: var(--c-line); position: relative; overflow: hidden;
}
.loader__bar::after {
  content: ""; position: absolute; inset: 0;
  background: var(--c-blue); transform: scaleX(0); transform-origin: left;
  animation: loadbar 1.4s var(--ease-out) forwards;
}
@keyframes loadbar { to { transform: scaleX(1); } }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background var(--d-base) var(--ease-out), height var(--d-base) var(--ease-out), border-color var(--d-base);
  /* Franja blanca semitransparente: legibilidad del menú/logo (negros) sobre el
     vídeo del hero al inicio. Al scrollear pasa a blanco sólido. */
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.site-header.is-scrolled {
  background: var(--c-white);
  border-bottom: 1px solid var(--c-line);
  height: 4.1rem;
}
.site-header.is-scrolled .brand__logo { height: 32px; }
.site-header__inner {
  width: 100%; max-width: 94rem; margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}

/* Logo oficial (SVG maestro): lockup símbolo + OCEANAVAL + descriptor (manual §1) */
.brand { display: inline-flex; align-items: center; }
.brand__logo {
  height: 42px; width: auto; display: block;
  transition: height var(--d-base) var(--ease-out);
}
/* Variante blanca (footer/fondos oscuros): el logo de color se vuelve blanco sólido */
.brand__logo--white { filter: brightness(0) invert(1); }
.site-footer .brand__logo { height: 44px; }

.nav { display: flex; align-items: center; gap: clamp(1.5rem, 2.5vw, 2.75rem); }
.nav__list { display: flex; gap: clamp(1.25rem, 2.5vw, 2.5rem); }
.nav__link {
  font-family: var(--f-base); font-size: var(--t-small);
  font-weight: 600; letter-spacing: 0.01em; color: var(--c-ink);
  position: relative; padding-block: 0.25rem;
  transition: color var(--d-fast);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 100%; height: 2px;
  background: var(--c-blue); transform: scaleX(0); transform-origin: right;
  transition: transform var(--d-base) var(--ease-out);
}
.nav__link:hover, .nav__link[aria-current="page"] { color: var(--c-blue); }
.nav__link:hover::after, .nav__link[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }

.nav__cta { display: inline-flex; }

/* Botón menú móvil */
.menu-toggle { display: none; width: 44px; height: 44px; position: relative; z-index: 120; }
.menu-toggle span {
  position: absolute; left: 9px; right: 9px; height: 2px; background: var(--c-ink);
  transition: transform var(--d-fast) var(--ease-out), opacity var(--d-fast);
}
.menu-toggle span:nth-child(1) { top: 16px; }
.menu-toggle span:nth-child(2) { top: 22px; }
.menu-toggle span:nth-child(3) { top: 28px; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { top: 22px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { top: 22px; transform: rotate(-45deg); }

/* Overlay menú móvil — fondo blanco plano */
.mobile-nav {
  position: fixed; inset: 0; z-index: 110;
  background: var(--c-white);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--gutter);
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.7s var(--ease-expo);
  visibility: hidden;
}
.mobile-nav.is-open { clip-path: inset(0 0 0 0); visibility: visible; }
.mobile-nav__list { display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-nav__link {
  font-family: var(--f-base); font-weight: 700;
  font-size: clamp(1.75rem, 8vw, 3rem); color: var(--c-ink);
  letter-spacing: -0.01em; display: flex; align-items: baseline; gap: 1rem;
  padding-block: 0.4rem; border-bottom: 1px solid var(--c-line);
}
.mobile-nav__link .num { font-family: var(--f-base); font-weight: 600; font-size: 0.9rem; color: var(--c-blue); }
.mobile-nav__foot { margin-top: 3rem; font-family: var(--f-base); font-size: var(--t-small); color: var(--c-muted); }
.mobile-nav__foot a { color: var(--c-blue); font-weight: 600; }

/* ---------- Footer (sección negra de acento — manual: bloque estructural) ---------- */
.site-footer {
  position: relative; background: var(--c-black); color: var(--c-on-dark-muted);
  border-top: 1px solid var(--c-black);
  padding-top: var(--s-5); overflow: hidden;
}
.site-footer .brand__word { color: var(--c-white); }
.site-footer .brand__descriptor { color: var(--c-on-dark-muted); }
.footer__grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--s-5);
  padding-bottom: var(--s-5);
}
.footer__brand .brand__word { font-size: 1.6rem; }
.footer__brand .brand__descriptor { font-size: 0.6rem; }
.footer__tagline { margin-top: 1.25rem; max-width: 32ch; color: var(--c-on-dark-muted); }
.footer__col h4 { font-family: var(--f-base); font-size: var(--t-small); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-white); margin-bottom: 1.25rem; }
.footer__col ul { display: flex; flex-direction: column; gap: 0.7rem; }
.footer__col a { color: var(--c-on-dark-muted); transition: color var(--d-fast); font-size: var(--t-body); }
.footer__col a:hover { color: var(--c-white); }
.footer__addr { font-style: normal; color: var(--c-on-dark-muted); font-size: 0.95rem; line-height: 1.7; }
.footer__addr strong { color: var(--c-white); font-family: var(--f-base); font-weight: 700; }

.footer__bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  flex-wrap: wrap;
  padding-block: 1.75rem; border-top: 1px solid #333333;
  font-family: var(--f-base); font-size: var(--t-small); color: var(--c-on-dark-muted);
}
.footer__bottom a { color: var(--c-on-dark-muted); transition: color var(--d-fast); }
.footer__bottom a:hover { color: var(--c-white); }
.footer__legal { display: flex; gap: 1.5rem; flex-wrap: wrap; }

/* ---------- Responsive header/footer ---------- */
@media (max-width: 860px) {
  .nav__list, .nav__cta { display: none; }
  .menu-toggle { display: block; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--s-4); }
}