/* Header-specific styles */
.site-header {
  background-color: var(--color-gray-900);
  padding: var(--spacing-4) 0;
  box-shadow: var(--shadow-sm);
}

.site-logo {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-logo:hover {
  text-decoration: underline;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-4);
  margin: 0;
}
.nav-menu li {
  margin-bottom: 0;
}
.nav-menu li a {
  color: var(--color-text);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-normal) ease;
}

.nav-menu li a:hover,
.nav-menu li a:focus {
  background-color: var(--color-gray-800);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--spacing-2);
}

.hamburger:hover,
.hamburger:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Responsive styles */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }
  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 84px;
    right: 0;
    background-color: var(--color-gray-900);
    width: 100%;
    text-align: center;
    padding: var(--spacing-4);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
  }
  .nav-menu.active {
    display: flex;
  }
}