/* Header */
#header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
  width: min(var(--content-width), calc(100% - (var(--padding-x) * 2)));
  padding: 0;
  max-width: var(--content-width);
  margin: 0 auto;
}

/* Left side */
.nav-left {
  display: flex;
  align-items: center;
  gap: 22px;
}

/* Language switch */
.lang-toggle,
.mobile-lang {
  display: flex;
  align-items: center;
  gap: 2px;
  width: fit-content;
  min-height: 30px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 2px;
  background: transparent;
  transition: border-color 0.2s ease;
}

/* Language chips */
.lang-chip {
  border: none;
  background: transparent;
  color: rgba(var(--color-accent-rgb), 0.58);
  border-radius: 999px;
  min-width: 31px;
  min-height: 24px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Chip hover */
.lang-toggle:hover,
.mobile-lang:hover {
  border-color: var(--color-white);
}

.lang-toggle:hover .lang-chip:not(.is-active),
.mobile-lang:hover .lang-chip:not(.is-active) {
  color: rgba(var(--color-accent-rgb), 0.9);
}

.lang-chip.is-active {
  background: var(--color-accent);
  color: #ffffff;
}

.lang-chip:hover:not(.is-active) {
  background: transparent;
  color: rgba(var(--color-accent-rgb), 0.9);
}

.lang-chip:focus,
.lang-chip:focus-visible {
  outline: none;
}

/* Links */
.nav-links {
  display: flex;
  gap: 24px;
}

/* Link states */
.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
  color: rgba(255, 255, 255, 0.82);
  background-image: radial-gradient(circle, var(--color-accent) 58%, transparent 60%);
  background-repeat: no-repeat;
  background-position: center calc(100% - 1px);
  background-size: 0 0;
  transition: color 0.2s, opacity 0.2s, background-size 0.2s;
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-links a.is-active {
  color: var(--color-accent);
}

.nav-links a.is-active,
.nav-links a:hover,
.nav-links a:focus-visible {
  background-size: 4px 4px;
}

/* Brand */
.nav-logo {
  --nav-logo-size: 62px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  isolation: isolate;
}

/* Logo swap */
.logo-icon-stack {
  display: inline-grid;
  place-items: center;
  width: var(--nav-logo-size);
  height: var(--nav-logo-size);
  flex: 0 0 auto;
}

.logo-icon {
  grid-area: 1 / 1;
  width: var(--nav-logo-size);
  height: var(--nav-logo-size);
  flex-shrink: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.logo-icon-filled {
  opacity: 1;
  transform: scale(1);
}

.logo-icon-outline {
  opacity: 0;
  transform: scale(0.98);
}

/* Wordmark */
.logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: var(--nav-logo-size);
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.5px;
  margin-left: -8px;
  color: var(--color-white);
  -webkit-text-stroke: 0 rgba(255, 255, 255, 0);
  transition: color 0.2s ease, -webkit-text-stroke-color 0.2s ease;
}

.nav-logo:hover .logo-icon-filled,
.nav-logo:focus-visible .logo-icon-filled {
  opacity: 0;
  transform: scale(0.98);
}

.nav-logo:hover .logo-icon-outline,
.nav-logo:focus-visible .logo-icon-outline {
  opacity: 1;
  transform: scale(1);
}

.nav-logo:hover .logo-text,
.nav-logo:focus-visible .logo-text {
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.96);
}

/* Burger */
.burger {
  display: none;
  position: relative;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

/* Burger lines */
.burger span {
  position: absolute;
  left: 0;
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all 0.25s;
}

/* Top line */
.burger span:nth-child(1) {
  top: 0;
}

/* Middle line */
.burger span:nth-child(2) {
  top: 50%;
  transform: translateY(-50%);
}

/* Bottom line */
.burger span:nth-child(3) {
  bottom: 0;
}

/* Open state */
.burger.open span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

/* Open middle */
.burger.open span:nth-child(2) {
  opacity: 0;
}

/* Open bottom */
.burger.open span:nth-child(3) {
  bottom: auto;
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
}

html.is-mobile-menu-open,
body.is-mobile-menu-open {
  overflow: hidden;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 20px;
  padding: 24px var(--padding-x) 32px;
  border-top: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.95);
  pointer-events: none;
}

/* Menu state */
.mobile-menu.open {
  display: flex;
  pointer-events: auto;
}

.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 110;
}

.mobile-menu-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

body.is-mobile-menu-open .nav-logo {
  z-index: 109;
}

body.is-mobile-menu-open .burger,
body.is-mobile-menu-open .mobile-menu {
  z-index: 121;
}

/* Menu links */
.mobile-link {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--color-white);
  transition: color 0.2s;
}

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

.mobile-menu .mobile-lang {
  border-color: rgba(var(--color-cursor-glow-rgb), 0.82);
  box-shadow:
    0 0 0 1px rgba(var(--color-cursor-glow-rgb), 0.08) inset,
    0 0 14px rgba(var(--color-dark-teal-rgb), 0.28);
}