:root {
  --subpage-nav-height: 68px;
}

body.has-subpage-nav {
  box-sizing: border-box;
  min-height: 100vh;
  padding-top: var(--subpage-nav-height);
}

body.has-subpage-nav > header {
  top: var(--subpage-nav-height);
}

body.has-subpage-nav .toggle-container {
  top: calc(var(--subpage-nav-height) + 12px);
}

nav.subpage-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--subpage-nav-height);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
}

nav.subpage-nav a.subpage-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: #ffffff;
  text-decoration: none;
  font-family: Arial, sans-serif;
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  transition: color 0.3s ease;
}

nav.subpage-nav a.subpage-nav__link:hover,
nav.subpage-nav a.subpage-nav__link:focus-visible {
  color: #9c9c9c;
}

@media (max-width: 768px) {
  :root {
    --subpage-nav-height: 60px;
  }

  nav.subpage-nav {
    padding: 0 1rem;
  }

  nav.subpage-nav a.subpage-nav__link {
    font-size: 20px;
  }
}