/* Cabecera: logo real, navegación con índice mono, idioma es/ca y botón en paralelogramo. */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h);
  display: flex; align-items: center; gap: 2rem; padding-inline: var(--gutter);
  color: var(--ink); transition: transform 0.6s var(--ease-set), color 0.4s, background-color 0.4s;
}
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1; background: rgb(255 255 255 / 0.86);
  backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line); opacity: 0; transition: opacity 0.4s;
}
.site-header.is-solid::before { opacity: 1; }
.site-header.is-hidden { transform: translateY(-100%); }
.site-header[data-theme="over"]:not(.is-solid) { color: #fff; }

.brand { display: block; width: clamp(78px, 7vw, 104px); flex: none; }
.brand__logo { width: 100%; height: auto; fill: currentColor; overflow: visible; }
.brand .logo__accent { transform-box: fill-box; transform-origin: 50% 50%; transition: transform 0.6s var(--ease-set), fill 0.3s; }
.brand:hover .logo__accent { transform: translate(-6%, -40%) rotate(-28.5deg); fill: var(--accent); }

.nav { margin-left: auto; }
.nav__list { display: flex; gap: clamp(1rem, 2.2vw, 2.4rem); }
.nav__link { display: inline-flex; align-items: baseline; gap: 0.35em; font-size: 0.95rem; letter-spacing: -0.01em;
  padding-block: 0.4rem; position: relative; }
.nav__link-n { font-family: var(--mono); font-size: 0.62rem; opacity: 0.55; }
.nav__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.1rem; height: 2px; background: var(--accent);
  transform: scaleX(0) skewX(calc(var(--slant) * -1)); transform-origin: right; transition: transform 0.5s var(--ease-set);
}
.nav__link:hover::after, .nav__link[aria-current="page"]::after { transform: scaleX(1) skewX(calc(var(--slant) * -1)); transform-origin: left; }

.site-header__tools { display: flex; align-items: center; gap: 1.2rem; }
.lang { display: inline-flex; align-items: center; gap: 0.35em; font-family: var(--mono); font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.04em; }
.lang__item { opacity: 0.5; transition: opacity 0.3s; padding: 0.4rem 0.1rem; }
.lang__item:hover, .lang__item.is-current { opacity: 1; }
.lang__sep { opacity: 0.35; }
.site-header[data-theme="over"]:not(.is-solid) .btn { --btn-bg: #fff; --btn-fg: var(--ink); }

.burger { display: none; width: 44px; height: 44px; position: relative; }
.burger__bars, .burger__bars::before {
  position: absolute; left: 10px; width: 24px; height: 2px; background: currentColor;
  transition: transform 0.5s var(--ease-set);
}
.burger__bars { top: 18px; }
.burger__bars::before { content: ""; left: 0; top: 7px; width: 16px; }
.burger[aria-expanded="true"] .burger__bars { transform: translateY(3.5px) rotate(var(--slant)); }
.burger[aria-expanded="true"] .burger__bars::before { transform: translateY(-7px) rotate(calc(var(--slant) * -2)); width: 24px; }

/* Menú a pantalla completa (móvil y tableta) */
.menu {
  position: fixed; inset: 0; z-index: 90; background: var(--paper); color: var(--ink);
  display: flex; flex-direction: column; justify-content: space-between;
  padding: calc(var(--header-h) + 2rem) var(--gutter) 2rem;
  clip-path: polygon(0 0, 100% 0, 100% 0, 0 calc(-25.38vw));
  visibility: hidden; transition: clip-path 0.6s var(--ease-set), visibility 0s 0.6s;
}
.menu[hidden] { display: none; }
.menu-open .menu {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% + 25.38vw)); visibility: visible;
  transition: clip-path 0.8s var(--ease-set), visibility 0s;
}
.menu__list { display: grid; gap: 0.2rem; }
.menu__link { display: flex; align-items: baseline; gap: 0.8rem; font-size: clamp(2.4rem, 11vw, 4.2rem);
  font-weight: 500; letter-spacing: var(--track-tight); line-height: 1.04; text-transform: lowercase; }
.menu__link-n { font-family: var(--mono); font-size: 0.75rem; color: var(--ink-3); letter-spacing: 0; }
.menu__link[aria-current="page"] .menu__link-t { color: var(--accent); }
.menu__meta { display: grid; gap: 0.6rem; font-family: var(--mono); font-size: 0.8rem; color: var(--ink-2); }
.menu__meta .lang { font-size: 0.9rem; margin-top: 0.6rem; }

@media (max-width: 1080px) {
  .nav, .site-header__tools > .btn, .site-header__tools > .lang { display: none; }
  .burger { display: block; }
  .site-header__tools { margin-left: auto; }
}
.menu-open { overflow: hidden; }
.menu-open .site-header { color: var(--ink); }
.menu-open .site-header::before { opacity: 0; }