/* Cabecera fija: logo original, navegación numerada, idioma, [ Contacto ] y menú móvil. */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 60; height: var(--header-h);
  display: flex; align-items: center; gap: clamp(16px, 3vw, 48px); padding: 0 var(--pad);
  color: var(--ink); transition: transform 0.6s var(--ease-snap), background 0.35s, color 0.35s, box-shadow 0.35s;
}
.site-header.is-solid { background: rgba(255, 255, 255, 0.94); box-shadow: 0 1px 0 var(--line); }
@supports (backdrop-filter: blur(1px)) {
  .site-header.is-solid { background: rgba(255, 255, 255, 0.82); backdrop-filter: blur(14px) saturate(1.3); }
}
.site-header.is-hidden { transform: translateY(-100%); }
/* Sobre el vídeo de la home: en blanco hasta que se vuelve sólida */
.is-home .site-header:not(.is-solid) { color: #fff; }
.is-home .site-header:not(.is-solid) .btn-brk i { color: #fff; }

.brand { display: block; flex: none; width: clamp(128px, 12vw, 172px); color: inherit; }
.brand__logo { width: 100%; height: auto; overflow: visible; }
.brand__logo .logo__l, .brand__logo .logo__r { transition: transform 0.5s var(--ease-snap); }
.brand:hover .logo__l { transform: translateX(-4px); }
.brand:hover .logo__r { transform: translateX(4px); }

.nav { margin-left: auto; }
.nav__list { display: flex; gap: clamp(16px, 2.2vw, 36px); }
.nav__link {
  position: relative; display: inline-flex; align-items: flex-start; gap: 0.35em; padding: 0.4em 0;
  text-decoration: none; font-weight: 500; font-size: 0.95rem;
}
.nav__link-n { font: 500 0.6rem / 1 var(--f-mono); opacity: 0.6; margin-top: 0.2em; }
.nav__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: right; transition: transform 0.5s var(--ease-snap);
}
.nav__link:hover::after, .nav__link[aria-current]::after { transform: scaleX(1); transform-origin: left; }

.site-header__tools { display: flex; align-items: center; gap: clamp(12px, 1.6vw, 24px); }
.lang {
  font: 500 0.72rem / 1 var(--f-mono); letter-spacing: 0.08em; text-decoration: none; padding: 0.6em 0.4em;
  border: 1px solid currentColor; border-radius: 99px; min-width: 2.6em; text-align: center;
}
.lang:hover { background: var(--blue); border-color: var(--blue); color: #fff; }

.burger { display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; padding: 0; position: relative; }
.burger__bars, .burger__bars::before, .burger__bars::after {
  position: absolute; left: 10px; right: 10px; height: 2px; background: currentColor; content: "";
  transition: transform 0.5s var(--ease-snap), opacity 0.3s;
}
.burger__bars { top: 21px; left: 14px; right: 14px; }
.burger__bars::before { top: -7px; left: -4px; right: -4px; }
.burger__bars::after { top: 7px; left: -4px; right: -4px; }
.menu-open .burger__bars { background: transparent; }
.menu-open .burger__bars::before { transform: translateY(7px) rotate(45deg); }
.menu-open .burger__bars::after { transform: translateY(-7px) rotate(-45deg); }

.menu {
  position: fixed; inset: 0; z-index: 55; background: var(--blue); color: var(--on-blue);
  display: flex; flex-direction: column; justify-content: center; gap: 40px; padding: calc(var(--header-h) + 24px) var(--pad) 32px;
  clip-path: inset(0 50% 0 50%); visibility: hidden; transition: clip-path 0.7s var(--ease-snap), visibility 0s 0.7s;
}
.menu-open .menu { clip-path: inset(0 0 0 0); visibility: visible; transition: clip-path 0.7s var(--ease-snap), visibility 0s; }
.menu-open .site-header { color: #fff; background: transparent; box-shadow: none; backdrop-filter: none; }
.menu-open .site-header .btn-brk i { color: #fff; }
.menu__list { display: grid; gap: 6px; }
.menu__link {
  display: flex; align-items: baseline; gap: 0.6em; text-decoration: none;
  font: 500 clamp(2rem, 9vw, 3.4rem) / 1.12 var(--f-display); letter-spacing: -0.03em;
}
.menu__link-n { font: 500 0.75rem / 1 var(--f-mono); opacity: 0.7; }
.menu__meta { display: grid; gap: 8px; font-size: 1rem; }
.menu__meta a { text-decoration: none; }
.menu__lang { font-family: var(--f-mono); font-size: 0.8rem; letter-spacing: 0.08em; }

@media (max-width: 1023px) {
  .nav { display: none; }
  .burger { display: block; }
  .site-header__tools { margin-left: auto; }
  .site-header__tools .lang { display: none; }
}
@media (max-width: 479px) {
  .site-header__tools .btn-brk { display: none; }
}
@media (min-width: 1024px) { .menu { display: none; } }