/**
 * header.css — Header, Navigation & Mobile Menu para ARK
 */

#ark-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  transition: background 0.4s ease, backdrop-filter 0.4s ease, border-color 0.4s ease;
  padding: 0;
  width: 100%;
}

#ark-nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.ark-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.ark-nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  z-index: 10;
}

.ark-nav__logo-img {
  width: 64px;
  height: 40px;
  object-fit: contain;
}

.ark-nav__menu-desktop {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 768px) {
  .ark-nav__menu-desktop {
    display: flex;
  }
}

.ark-nav__link {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.25s var(--ease-ark);
}

.ark-nav__link:hover {
  color: var(--fg);
}

.ark-nav__actions {
  display: none;
  align-items: center;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .ark-nav__actions {
    display: flex;
  }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━ HAMBURGER BUTTON ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
#hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 8px;
  margin-right: -8px;
}

@media (min-width: 768px) {
  #hamburger-btn {
    display: none;
  }
}

.hamburger-line {
  display: block;
  height: 1.5px;
  background: var(--fg);
  transition: all 0.3s var(--ease-ark);
  transform-origin: center;
}

.hamburger-line:nth-child(1),
.hamburger-line:nth-child(3) {
  width: 24px;
}

.hamburger-line:nth-child(2) {
  width: 16px;
  background: var(--accent-alt);
}

/* Estado activo del botón hamburguesa */
#hamburger-btn.is-active .hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

#hamburger-btn.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
  width: 0;
}

#hamburger-btn.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━ MOBILE FULLSCREEN MENU ━━━━━━━━━━━━━━━━━━━━━━━━━━ */
#mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: var(--z-mobile-menu);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translateX(100%);
  transition: transform 0.5s var(--ease-ark);
  padding: 2rem;
}

#mobile-menu.open {
  transform: translateX(0);
}

.ark-mobile-logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.25rem;
  letter-spacing: 0.2em;
  color: var(--fg);
  text-decoration: none;
  text-transform: uppercase;
  margin-bottom: 3rem;
}

.ark-mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.3s var(--ease-ark);
}

.mobile-nav-link:hover {
  color: var(--accent-alt);
}

.ark-mobile-footer-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 3rem;
}