.site-header {
  position: relative;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: var(--color-navy);
  border-bottom: 4px solid var(--color-red);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.site-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-right: auto;
  color: #fff;
  text-decoration: none;
}

.site-title-logo {
  display: block;
  width: auto;
  height: 4.5rem;
}

.site-title-tagline {
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: #cfd8e6;
  text-transform: uppercase;
  border-left: 2px solid var(--color-red);
  padding-left: 0.75rem;
}

@media (max-width: 680px) {
  .site-title-logo {
    height: 2.75rem;
  }

  .site-title-tagline {
    display: none;
  }
}

.site-nav a {
  margin-right: 1.25rem;
  color: #e7ecf5;
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover { color: var(--color-gold); }

.theme-toggle {
  border: 1px solid #3a4a63;
  background: transparent;
  color: #e7ecf5;
  border-radius: 999px;
  width: 2.1rem;
  height: 2.1rem;
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
}

.theme-toggle:hover { border-color: var(--color-gold); color: var(--color-gold); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid #3a4a63;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 1.05rem;
  height: 2px;
  margin: 0 auto;
  background: #e7ecf5;
  border-radius: 1px;
}

.nav-toggle:hover span { background: var(--color-gold); }

@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-navy-dark);
    border-bottom: 4px solid var(--color-red);
    padding: 0.5rem 1.5rem 1rem;
  }

  .site-nav.is-open { display: flex; }

  .site-nav a {
    margin-right: 0;
    padding: 0.6rem 0;
    border-bottom: 1px solid #26344c;
  }

  .site-nav a:last-child { border-bottom: none; }
}