.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-navbar);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4.25rem;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--text);
}

.navbar__logo {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--dotnet-purple), var(--vs-purple));
  box-shadow: 0 0 18px rgba(81, 43, 212, 0.55);
}

.navbar__name strong {
  color: var(--dotnet-lilac);
}

.navbar__menu {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 1rem;
}

.navbar__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin-inline: auto;
}

.navbar__links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}

.navbar__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--dotnet-purple), var(--accent-blue));
  transition: width var(--transition);
}

.navbar__links a:hover::after,
.navbar__links a:focus-visible::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), color var(--transition);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn--primary {
  border: none;
  color: #fff;
  background: linear-gradient(135deg, var(--dotnet-purple), var(--vs-purple));
  box-shadow: 0 0 18px rgba(81, 43, 212, 0.45);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  box-shadow: 0 0 28px rgba(81, 43, 212, 0.7);
}

.btn--icon {
  padding: 0.55rem;
}

.icon {
  width: 1.15rem;
  height: 1.15rem;
}

:root[data-theme="dark"] .icon--sun { display: block; }
:root[data-theme="dark"] .icon--moon { display: none; }
:root[data-theme="light"] .icon--sun { display: none; }
:root[data-theme="light"] .icon--moon { display: block; }

.navbar__menu-toggle {
  display: none;
}

.navbar__menu-toggle .icon--close {
  display: none;
}

.navbar__menu-toggle[aria-expanded="true"] .icon--menu {
  display: none;
}

.navbar__menu-toggle[aria-expanded="true"] .icon--close {
  display: block;
}

.lang-switcher {
  position: relative;
}

.lang-switcher__code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.lang-switcher__menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  z-index: 200;
  min-width: 9.5rem;
  list-style: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-card-hover);
  padding: 0.35rem;
  display: grid;
  gap: 0.15rem;
}

.lang-switcher__menu[hidden] {
  display: none;
}

.lang-switcher__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background var(--transition);
}

.lang-switcher__option:hover,
.lang-switcher__option:focus-visible {
  background: var(--tag-bg);
}

.lang-switcher__option-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.lang-switcher__option[aria-current] {
  color: var(--dotnet-lilac);
  font-weight: 700;
}

.lang-switcher__option[aria-current] .lang-switcher__option-code {
  color: var(--dotnet-lilac);
}

@media (max-width: 40rem) {
  .navbar__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 0.5rem 1.25rem 1rem;
  }

  .navbar__menu.is-open {
    display: block;
  }

  .navbar__links {
    display: grid;
    gap: 0;
    margin-inline: 0;
  }

  .navbar__links a {
    display: block;
    padding: 0.7rem 0;
    font-size: 1rem;
  }

  .navbar__links a::after {
    display: none;
  }

  .navbar__links li + li {
    border-top: 1px solid var(--border);
  }

  .navbar__actions {
    margin-top: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }

  .lang-switcher__menu {
    left: 0;
    right: auto;
  }

  .navbar__menu-toggle {
    display: inline-flex;
  }
}