.site-header {
  position: relative;
  border-bottom: 4px solid var(--accent);
  background: var(--surface);
}

.site-header-inner {
  position: relative;
  display: block;
  padding: var(--space-3) var(--space-3);
}

.site-brand-block {
  min-width: 0;
}

.site-kicker {
  margin: 0 0 var(--space-1);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-title {
  display: inline-block;
  margin: 0 0 var(--space-2);
  color: var(--text);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav-desktop {
  display: block;
  margin-top: var(--space-2);
}

.site-nav-mobile {
  display: none;
}

.site-menu-toggle {
  display: none;
  width: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--accent-strong);
  line-height: 1;
  cursor: pointer;
}

.site-menu-icon {
  display: inline-block;
  position: relative;
  width: 1.25rem;
  height: 2px;
  vertical-align: middle;
  background: currentColor;
  transition: background-color 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.site-menu-icon::before,
.site-menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  transition: transform 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.site-menu-icon::before {
  top: -0.38rem;
}

.site-menu-icon::after {
  top: 0.38rem;
}

.site-menu-toggle.is-open .site-menu-icon {
  background: transparent;
}

.site-menu-toggle.is-open .site-menu-icon::before {
  transform: translateY(0.38rem) rotate(45deg);
}

.site-menu-toggle.is-open .site-menu-icon::after {
  transform: translateY(-0.38rem) rotate(-45deg);
}

.site-nav-mobile-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav-mobile-list li {
  opacity: 0;
  transition: opacity 140ms ease-out;
}

.site-nav-mobile-list a {
  display: flex;
  align-items: center;
  position: relative;
  min-height: 2.75rem;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--accent-strong);
  font-weight: 600;
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: border-color 180ms ease-out, background-color 180ms ease-out, color 180ms ease-out;
}

.site-nav-mobile-list a:not([aria-current="page"]):hover,
.site-nav-mobile-list a:not([aria-current="page"]):focus {
  border-color: var(--accent);
  background: #f7fbff;
  color: var(--accent-strong);
  text-decoration: underline;
}

.site-nav-mobile-list a[aria-current="page"] {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.site-nav-mobile-list a[aria-current="page"]:hover,
.site-nav-mobile-list a[aria-current="page"]:focus {
  color: #fff;
}

.site-nav a {
  display: flex;
  align-items: center;
  position: relative;
  min-height: 2.5rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--accent-strong);
  font-weight: 600;
  text-decoration: none;
  transition: border-color 180ms ease-out, background-color 180ms ease-out, color 180ms ease-out;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms ease-out;
}

.site-nav a:not([aria-current="page"]):hover,
.site-nav a:not([aria-current="page"]):focus {
  border-color: var(--accent);
  background: #f7fbff;
  color: var(--accent-strong);
}

.site-nav a:not([aria-current="page"]):hover::after,
.site-nav a:not([aria-current="page"]):focus::after {
  transform: scaleX(1);
}

.site-nav a[aria-current="page"] {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.site-nav a[aria-current="page"]:hover,
.site-nav a[aria-current="page"]:focus {
  color: #fff;
}

.site-nav a[aria-current="page"]::after {
  transform: scaleX(0);
}

@media (max-width: 56.25rem) {
  .site-nav-desktop {
    display: none;
  }

  .site-kicker {
    display: none;
  }

  .site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem var(--space-2);
  }

  .site-title {
    margin: 0;
    font-size: 1.05rem;
  }

  .site-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav-mobile {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: 0.75rem var(--space-2) 0.9rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 140ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 140ms cubic-bezier(0.2, 0.8, 0.2, 1);
  }

  .site-nav-mobile.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    transition-duration: 180ms;
  }

  .site-nav-mobile.is-open .site-nav-mobile-list li {
    opacity: 1;
  }

  .site-nav-mobile.is-open .site-nav-mobile-list li:nth-child(1) { transition-delay: 20ms; }
  .site-nav-mobile.is-open .site-nav-mobile-list li:nth-child(2) { transition-delay: 55ms; }
  .site-nav-mobile.is-open .site-nav-mobile-list li:nth-child(3) { transition-delay: 90ms; }
  .site-nav-mobile.is-open .site-nav-mobile-list li:nth-child(4) { transition-delay: 125ms; }
  .site-nav-mobile.is-open .site-nav-mobile-list li:nth-child(5) { transition-delay: 160ms; }

  .site-nav-mobile.is-closing .site-nav-mobile-list li {
    transition-delay: 0ms !important;
  }
}