.nav {
  position: fixed; inset: 0 0 auto 0; z-index: var(--z-nav);
  --nav-h: 4.5rem;
  transition: background-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.nav__inner { transition: height var(--dur-slow) var(--ease-out); }
.nav__logo { transition: transform var(--dur-slow) var(--ease-out); transform-origin: left center; }
.nav[data-state="scrolled"] { --nav-h: 3.5rem; }
.nav[data-state="scrolled"] .nav__logo { transform: scale(0.86); }
.nav[data-state="scrolled"] {
  background: color-mix(in srgb, var(--ink-900) 86%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--line);
}
.nav__inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: var(--s-6); }

.nav__logo { display: inline-flex; align-items: center; gap: var(--s-3); }
.nav__logo picture { display: contents; }
.nav__full { height: 2.5rem; width: auto; display: block; }
.nav__logo--footer .nav__full { height: 3rem; }
@media (min-width: 1024px) { .nav__full { height: 2.875rem; } }
.nav__mark { width: 2.25rem; height: auto; }
.nav__word { font-size: 1.25rem; font-weight: 300; letter-spacing: -0.02em; line-height: 1; }
.nav__word b { font-weight: 700; }
.nav__word small { display: block; font-size: 0.8125rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-muted); margin-top: 0.2rem; }

.nav__links { display: none; gap: var(--s-8); }
.nav__links a { position: relative; font-size: 1.0625rem; font-weight: 500; letter-spacing: 0.01em; color: rgba(244, 245, 250, 0.84); padding: var(--s-2) 0; transition: color var(--dur-fast); }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--fg); transition: right var(--dur-base) var(--ease-out); }
.nav__links a:hover, .nav__links a[aria-current="true"] { color: var(--fg); }
.nav__links a:hover::after, .nav__links a[aria-current="true"]::after { right: 0; }

.nav__actions { display: flex; align-items: center; gap: var(--s-4); }
.btn--nav { display: none; min-height: 2.75rem; padding-inline: 1.25rem; }

.nav__burger { width: 2.75rem; height: 2.75rem; display: grid; place-items: center; gap: 0; border-radius: var(--r-pill); box-shadow: inset 0 0 0 1px var(--line-strong); }
.nav__burger span { display: block; width: 1.125rem; height: 1.5px; background: var(--fg); transition: transform var(--dur-base) var(--ease-out); grid-area: 1/1; }
.nav__burger span:first-child { transform: translateY(-3px); }
.nav__burger span:last-child { transform: translateY(3px); }
.nav__burger[aria-expanded="true"] span:first-child { transform: rotate(45deg); }
.nav__burger[aria-expanded="true"] span:last-child { transform: rotate(-45deg); }

/* Menú móvil fullscreen — vive fuera del header: el backdrop-filter de la nav no puede convertirse en su containing block */
.menu { position: fixed; inset: 0; z-index: calc(var(--z-nav) - 1); background: var(--ink-950); display: flex; flex-direction: column; justify-content: center; padding-top: 4.5rem;
  opacity: 0; transition: opacity var(--dur-base) var(--ease-out); }
.menu::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 40% at 80% 10%, color-mix(in srgb, var(--brand-blue) 22%, transparent), transparent 70%); pointer-events: none; }
.menu[hidden] { display: none; }
.menu:focus { outline: none; }
.menu.is-open { opacity: 1; }
.menu__links { display: flex; flex-direction: column; gap: var(--s-4); position: relative; }
.menu__links a { opacity: 0; transform: translateY(0.6rem); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); transition-delay: calc(60ms + var(--i, 0) * 45ms); }
.menu.is-open .menu__links a { opacity: 1; transform: none; }
.menu__links a:not(.btn) { font-size: clamp(2rem, 8vw, 3rem); font-weight: 300; letter-spacing: -0.02em; line-height: 1.1; display: flex; align-items: baseline; gap: var(--s-4); }
.menu__links a:not(.btn) span { font-size: 0.9375rem; font-weight: 500; letter-spacing: 0.18em; color: var(--brand-lime); }
.menu__cta { margin-top: var(--s-6); align-self: flex-start; }
.menu__foot { position: absolute; bottom: var(--s-6); left: 0; right: 0; font-size: var(--fs-small); color: var(--fg-subtle); }
@media (prefers-reduced-motion: reduce) { .menu, .menu__links a { transition: none; } }
body.menu-open { overflow: hidden; }

@media (min-width: 1024px) {
  .nav__links { display: flex; gap: var(--s-4); }
  .nav__links a { font-size: 0.9375rem; }
  .btn--nav { display: inline-flex; white-space: nowrap; flex-shrink: 0; }
  .nav__logo { flex-shrink: 0; }
  .nav__burger { display: none; }
}
@media (min-width: 1280px) {
  .nav__links { gap: var(--s-6); }
  .nav__links a { font-size: 1rem; }
}
@media (min-width: 1440px) {
  .nav__links { gap: var(--s-8); }
  .nav__links a { font-size: 1.0625rem; }
}