/* ============================================================
   NAVIGATION
   ============================================================ */

#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background-color var(--transition-slow),
              height var(--transition-base),
              box-shadow var(--transition-base);
}

#site-nav.scrolled {
  height: var(--nav-height-scrolled);
  background-color: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border-color), var(--shadow-md);
}

.nav-container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

@media (min-width: 1280px) {
  .nav-container {
    padding-inline: var(--space-16);
  }
}

/* ---- LOGO ---- */

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo__icon {
  width: 36px;
  height: 36px;
}

.nav-logo__text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-white);
  line-height: 1;
}

.nav-logo__text .accent {
  color: var(--color-red);
}

/* ---- DESKTOP MENU ---- */

.nav-menu {
  display: none;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
}

.nav-menu__item {
  position: relative;
}

.nav-menu__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-grey-400);
  border-radius: var(--radius-md);
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-menu__link:hover,
.nav-menu__link.active {
  color: var(--color-white);
  background-color: rgba(255,255,255,0.06);
}

.nav-menu__link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--color-red);
  border-radius: var(--radius-full);
}

/* ---- NAV ACTIONS ---- */

.nav-actions {
  display: none;
  align-items: center;
  gap: var(--space-3);
}

@media (min-width: 1024px) {
  .nav-actions {
    display: flex;
  }
}

/* ---- HAMBURGER ---- */

.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: none;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: border-color var(--transition-base);
}

@media (min-width: 1024px) {
  .nav-hamburger {
    display: none;
  }
}

.nav-hamburger:hover {
  border-color: var(--color-grey-600);
}

.nav-hamburger__line {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
  transform-origin: center;
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger[aria-expanded="true"] .nav-hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- MOBILE MENU ---- */

#mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--nav-height);
  background-color: var(--color-black);
  z-index: calc(var(--z-nav) - 1);
  display: flex;
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  gap: var(--space-2);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

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

.mobile-menu__link {
  display: block;
  padding: var(--space-4) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-grey-400);
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--border-color);
  transition: color var(--transition-base);
}

.mobile-menu__link:hover {
  color: var(--color-white);
}

.mobile-menu__cta {
  margin-top: var(--space-6);
}

.mobile-menu__cta .btn {
  width: 100%;
  justify-content: center;
}

/* ---- LANGUAGE SWITCHER ---- */

.lang-switcher {
  display: none;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

@media (min-width: 1024px) {
  .lang-switcher {
    display: flex;
  }
}

.lang-switcher__link {
  display: block;
  padding: 5px var(--space-2);
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-grey-500);
  transition: color var(--transition-base), background-color var(--transition-base);
  line-height: 1;
}

.lang-switcher__link + .lang-switcher__link {
  border-left: 1px solid var(--border-color);
}

.lang-switcher__link:hover {
  color: var(--color-white);
  background-color: rgba(255,255,255,0.06);
}

.lang-switcher__link.active,
.lang-switcher__link[aria-current="true"] {
  color: var(--color-white);
  background-color: rgba(255,255,255,0.08);
}

/* Mobile lang switcher */
.mobile-menu__lang {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--space-2);
}

.mobile-menu__lang-link {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-grey-500);
  transition: color var(--transition-base);
}

.mobile-menu__lang-link:hover,
.mobile-menu__lang-link.active {
  color: var(--color-white);
}