.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  color: var(--color-green-dark);
  background: var(--color-bg);
  transition:
    background-color 0.25s ease,
    color 0.25s ease;
  border-bottom: 1px solid currentColor;
}

.site-header[data-theme="dark"] {
  background: var(--color-green-dark);
  color: var(--color-text-light);
}

.site-header[data-theme="warm"] {
  background: var(--color-orange);
  color: var(--color-green-dark);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 5rem;
  padding: 0.75rem clamp(1.5rem, 5vw, 4rem);
}

.site-nav a {
  color: inherit;
  text-decoration: none;
  opacity: 1;
  transition: opacity 0.2s ease-in-out;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  opacity: 0.7;
  text-decoration: none;
}

.site-nav a:active {
  opacity: 0.5;
}

.site-nav a[aria-current] {
  text-decoration: none;
}

.site-nav .title {
  font: 500 clamp(1.6rem, 3vw, 2.2rem)/1.2 var(--font-heading);
  text-decoration: none;
}

.site-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav small {
  display: block;
  font-size: 0.65em;
  line-height: 1.5;
}

.site-nav .btn {
  border-color: currentColor;
  padding: 0.5rem 1rem;
}

@media (max-width: 600px) {
  .site-nav a[data-section="about"],
  .site-nav a[data-section="projects"] {
    display: none;
  }

  .site-nav {
    padding-inline: 1rem;
    gap: 0.5rem;
  }

  .site-nav .nav-links {
    gap: 0.75rem;
    font-size: 0.8rem;
  }

  .site-nav .btn {
    padding: 0.5rem 0.65rem;
  }
}