.site-header {
  position: sticky;
  top: 0;
  background: #fff;
  box-shadow: var(--shadow-sm);
  z-index: 100;
}

.utility-bar {
  background: var(--color-primary-dark);
  color: #fff;
  font-size: var(--fs-sm);
}
.utility-bar__inner {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding-block: 0.4rem;
}
.utility-bar a {
  color: rgba(255,255,255,.85);
  transition: color var(--transition);
}
.utility-bar a:hover { color: var(--color-accent); }

.main-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-3);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo img { height: 48px; width: auto; }

.main-nav { display: flex; }
.main-nav > ul {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}
.main-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--fs-sm);
  padding-block: 0.5rem;
  position: relative;
}
.main-nav a:hover { color: var(--color-accent-dark); }
.main-nav .is-active { color: var(--color-accent-dark); }
.main-nav .is-active::after {
  content: "";
  position: absolute;
  bottom: -4px; left: 0;
  width: 100%; height: 3px;
  background: var(--color-accent);
}

.has-dropdown { position: relative; }
.has-dropdown .dropdown {
  position: absolute;
  top: 100%; left: 0;
  background: #fff;
  box-shadow: var(--shadow-md);
  border-radius: var(--radius);
  min-width: 200px;
  padding: var(--space-1);
  display: none;
  flex-direction: column;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { display: flex; }
.dropdown a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
}
.dropdown a:hover { background: var(--color-bg-alt); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition);
}