/* ── Glass Top Navigation ───────────────────────────────────────── */
.glass-top-nav {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translate3d(-50%, -1.25rem, 0);
  z-index: 1200;
  box-sizing: border-box;
  display: inline-flex;
  align-items: stretch;
  height: clamp(44px, 12vmin, 60px);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  border: 0px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 5px 2px rgba(0,0,0,0.05),
    0 -5px 2px rgba(0,0,0,0.05),
    inset 0 1px 0 rgba(255,255,255,0.28);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  padding: 0;
  max-width: var(--glass-nav-bar-max-width);
  width: max-content;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 220ms ease-out,
    transform 320ms cubic-bezier(0.19, 1, 0.22, 1);
}

.glass-top-nav.glass-top-nav--visible {
  opacity: 1;
  pointer-events: auto;
  transform: translate3d(-50%, 0, 0);
}

.glass-top-nav.glass-top-nav--in-slide {
  position: absolute;
  z-index: 5;
}

.glass-top-nav.glass-top-nav--sticky {
  position: fixed;
  z-index: 1200;
}

.glass-top-nav__toggle {
  position: fixed;
  top: max(3.75rem, env(safe-area-inset-top));
  right: max(1.2rem, env(safe-area-inset-right));
  width: var(--glass-nav-toggle-size);
  height: var(--glass-nav-toggle-size);
  border-radius: 50%;
  border: none;
  padding: 0;
  display: none;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: rgba(217, 217, 217, 0.2);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  cursor: pointer;
  z-index: 1300;
}

.glass-top-nav__toggle-canvas {
  width: clamp(2.25rem, 10vmin, 3.875rem);
  height: clamp(2.25rem, 10vmin, 3.875rem);
  pointer-events: none;
  filter: brightness(0) invert(1);
}

.glass-top-nav__toggle:hover {
  transform: translateY(-1px);
  box-shadow:
    0 6px 24px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.glass-top-nav__inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: clamp(0.75rem, 3.5vmin, 2.5rem);
  height: 100%;
  padding: 0;
  position: relative;
}

.glass-top-nav__active-bg {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  pointer-events: none;
  z-index: 0;
}

.glass-top-nav__item {
  position: relative;
  box-sizing: border-box;
  flex: 0 0 clamp(4.5rem, 18vmin, 8.625rem);
  width: clamp(4.5rem, 18vmin, 8.625rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 0;
  margin: 0;
  border-radius: 999px;
  background: transparent;
  color: #000;
  font-family: 'Source Sans Pro', sans-serif;
  font-weight: 700;
  font-size: clamp(0.95rem, 2.8vmin, 1.5rem);
  line-height: 1;
  letter-spacing: 0;
  white-space: nowrap;
  transition: background-color 150ms ease-out;
  z-index: 1;
}

.glass-top-nav__item:hover {
  background-color: rgba(255, 255, 255, 0.12);
}

.glass-top-nav__item--active {
  color: #000;
}

.glass-top-nav__item:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

.glass-top-nav__icon {
  display: block;
  width: clamp(22px, 5vmin, 31px);
  height: clamp(20px, 4.5vmin, 28px);
  filter: brightness(0);
}

@media (max-width: 1079px) {
  .glass-top-nav {
    top: 0.75rem;
    height: auto;
    min-height: 0;
    padding: 0.2rem;
    transition: none;
  }

  .glass-top-nav__item {
    flex: 0 1 auto;
    width: 100%;
    max-width: 22rem;
    height: auto;
    min-height: 3.25rem;
    font-size: clamp(1.25rem, 5vw, 1.75rem);
  }

  .glass-top-nav__toggle {
    display: inline-flex;
  }

  .glass-top-nav__active-bg {
    display: none;
  }

  .glass-top-nav.glass-top-nav--visible {
    opacity: 0;
    pointer-events: none;
    transform: translate3d(-50%, -0.5rem, 0);
  }

  body.glass-top-nav-menu-open .glass-top-nav.glass-top-nav--visible {
    opacity: 1;
    pointer-events: auto;
    position: fixed;
    inset: 0;
    transform: none;
    max-width: none;
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    min-height: 0;
    border-radius: 0;
    z-index: 1200;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: max(0.75rem, env(safe-area-inset-top)) max(0.75rem, env(safe-area-inset-right))
      max(0.75rem, env(safe-area-inset-bottom)) max(0.75rem, env(safe-area-inset-left));
    box-sizing: border-box;
    overflow: hidden;
  }

  body.glass-top-nav-menu-open .glass-top-nav__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    flex: 1 1 auto;
    gap: clamp(0.25rem, 1.5dvh, 1.25rem);
    min-height: 0;
    width: 100%;
    max-width: 22rem;
    max-height: 100%;
    padding: clamp(0.5rem, 2.5dvh, 2rem) 1.5rem;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  body.glass-top-nav-menu-open .glass-top-nav__item {
    flex: 0 0 auto;
    align-self: stretch;
    min-height: clamp(2.25rem, 9dvh, 3.25rem);
    height: auto;
    max-height: none;
    font-size: clamp(0.8rem, min(4.5dvh, 5vw), 1.75rem);
  }

  body.glass-top-nav-menu-open .glass-top-nav__icon {
    width: clamp(16px, min(5dvh, 6vmin), 31px);
    height: clamp(14px, min(4.5dvh, 5.5vmin), 28px);
  }
}