/* ══════════════════════════════════════════════════════════════
   iTura studio — Component: Navigation
   ══════════════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: var(--nav-h);
  z-index: 900;
  background-color: var(--color-marfil);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base);
  /* Solo opacidad: un transform convertiría a .nav en el bloque
     contenedor del panel móvil (position: fixed). */
  animation: navFadeIn 0.8s var(--ease-out) both;
}

/* ── Scrolled state (added by JS) ────────────────────────────── */
.nav.is-scrolled { border-color: var(--color-travertino); }

/* ── Inner layout ────────────────────────────────────────────── */
.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Brand / Logo ────────────────────────────────────────────────
   SVG maestro horizontal en carbón. El archivo trae 18 u de aire
   propio (5,36 % del ancho): se compensa para que el dibujo quede
   alineado al margen. Sin efectos al pasar el cursor. */
.nav__brand {
  display: block;
  flex: none;
  margin-inline-start: calc(var(--logo-w) * -0.0536);
}
.nav__logo {
  width: var(--logo-w);
  height: auto;
}

/* ── Desktop links ───────────────────────────────────────────── */
.nav__links { display: none; }

.nav__link {
  position: relative;
  display: inline-block;
  padding-block: var(--sp-2);
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  letter-spacing: 0.02em;
  color: var(--color-carbon);
}
/* Filete de latón: detalle, el texto sigue en carbón */
.nav__link::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: 2px;
  height: 1px;
  background-color: var(--color-laton);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.nav__link:focus-visible::after,
.nav__link[aria-current="true"]::after { transform: scaleX(1); }

@media (hover: hover) {
  .nav__link:hover::after { transform: scaleX(1); }
}

/* ── Hamburger (mobile only) ─────────────────────────────────── */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 48px;
  height: 48px;
  margin-inline-end: -12px;   /* las líneas quedan alineadas al margen */
  color: var(--color-carbon);
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background-color: currentColor;
  transition: transform var(--t-base);
  transform-origin: center;
}
/* Open state */
.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

/* ── Mobile overlay (velo carbón al 50 %) ────────────────────── */
.nav__overlay {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background-color: rgba(17, 17, 15, 0.5);
  z-index: 899;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-slow);
}
.nav__overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ── Mobile menu panel ───────────────────────────────────────────
   Entra por la derecha bajo la barra, así el logo nunca queda
   tapado. visibility lo saca del orden de tabulación al cerrarse. */
.nav__mobile {
  --focus: var(--color-laton);
  position: fixed;
  inset-block: var(--nav-h) 0;
  inset-inline-end: 0;
  width: min(360px, 88vw);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--sp-12);
  padding: var(--sp-12) var(--page-margin) var(--sp-10);
  overflow-y: auto;
  background-color: var(--color-carbon);
  color: var(--color-marfil);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--t-slow), visibility 0s linear 0.7s;
}
.nav__mobile.is-open {
  transform: none;
  visibility: visible;
  transition: transform var(--t-slow), visibility 0s;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.nav__mobile-link {
  display: flex;
  align-items: baseline;
  gap: var(--sp-5);
  padding-block: var(--sp-2);
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  font-weight: var(--fw-light);
  color: var(--color-marfil);
  opacity: 0;
  transform: translateX(24px);
  transition: opacity var(--t-base), transform var(--t-slow), color var(--t-base);
}
.nav__mobile-num {
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
  color: var(--color-laton);
}
.nav__mobile.is-open .nav__mobile-link { opacity: 1; transform: none; }
.nav__mobile.is-open li:nth-child(1) .nav__mobile-link { transition-delay: 0.12s; }
.nav__mobile.is-open li:nth-child(2) .nav__mobile-link { transition-delay: 0.18s; }
.nav__mobile.is-open li:nth-child(3) .nav__mobile-link { transition-delay: 0.24s; }
.nav__mobile.is-open li:nth-child(4) .nav__mobile-link { transition-delay: 0.30s; }
.nav__mobile-link[aria-current="true"] { color: var(--color-laton); }

.nav__mobile-contact {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-size: var(--fs-small);
  color: var(--color-piedra-clara);
}
.nav__mobile-contact a {
  align-self: flex-start;
  color: var(--color-marfil);
}

/* ── Responsive breakpoint ───────────────────────────────────── */
@media (min-width: 1024px) {
  .nav__links {
    display: flex;
    align-items: center;
    gap: var(--sp-10);
  }
  .nav__hamburger,
  .nav__mobile,
  .nav__overlay { display: none; }
}

/* ── Keyframes ───────────────────────────────────────────────── */
@keyframes navFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}