/* ==========================================================================
   menu.css
   Fixed header, navigation and responsive mobile menu
   ========================================================================== */

body > header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-height);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border-bottom: 1px solid var(--color-border);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

body > header.scrolled {
  box-shadow: var(--shadow-md);
}

.menu-container {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.65rem;
  width: min(100%, 90rem);
  height: 100%;
  margin-inline: auto;
  padding-inline: clamp(0.75rem, 2.5vw, 1.75rem);
}

.logo {
  display: flex;
  align-items: center;
  min-width: 0;
}

.logo a {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
}

.logo-image,
.logo img {
  width: auto;
  height: 3rem;
  object-fit: contain;
  transition:
    transform var(--transition-base),
    filter var(--transition-base);
}

.logo a:hover .logo-image,
.logo a:hover img {
  transform: scale(1.04);
  filter: brightness(1.08);
}

.menu-items {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  gap: clamp(0.55rem, 1.15vw, 1.15rem);
  margin: 0;
  padding: 0 0.6rem;
}

.menu-items a {
  position: relative;
  flex: 0 0 auto;
  padding: 0.55rem 0.1rem;
  color: var(--color-text);
  font-size: clamp(0.82rem, 1.1vw, 0.96rem);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.menu-items a::after {
  content: "";
  position: absolute;
  right: 50%;
  bottom: 0.15rem;
  left: 50%;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  transition:
    right var(--transition-base),
    left var(--transition-base);
}

.menu-items a:hover,
.menu-items a.active,
.menu-items a[aria-current="page"] {
  color: var(--color-accent);
}

.menu-items a:hover::after,
.menu-items a.active::after,
.menu-items a[aria-current="page"]::after {
  right: 0;
  left: 0;
}

.menu-button {
  display: none;
}

/* The breakpoint is intentionally wider because the navigation has many links. */
@media (max-width: 68rem) {
  .menu-container {
    grid-template-columns: auto 1fr auto auto;
  }

  .menu-button {
    display: inline-flex;
  }

  .menu-items {
    position: absolute;
    top: calc(var(--header-height) - 1px);
    right: 0.75rem;
    left: 0.75rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem;
    max-height: calc(100vh - var(--header-height) - 1rem);
    padding: 0.75rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: color-mix(in srgb, var(--color-surface) 97%, transparent);
    border: 1px solid var(--color-border);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    pointer-events: none;
    transition:
      opacity var(--transition-base),
      visibility var(--transition-base),
      transform var(--transition-base);
  }

  .menu-items.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .menu-items a {
    display: block;
    padding: 0.85rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.98rem;
    line-height: 1.25;
    white-space: normal;
  }

  .menu-items a::after {
    display: none;
  }

  .menu-items a:hover,
  .menu-items a.active,
  .menu-items a[aria-current="page"] {
    color: var(--color-accent);
    background: var(--color-accent-soft);
  }
}

@media (max-width: 36rem) {
  .menu-container {
    gap: 0.4rem;
    padding-inline: 0.65rem;
  }

  .logo-image,
  .logo img {
    height: 2.6rem;
  }

  .menu-items {
    right: 0.4rem;
    left: 0.4rem;
    grid-template-columns: 1fr;
  }
}