.site-header {
  position: relative;
  border-bottom: var(--border-width) solid var(--color-border);
  background: var(--color-surface);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.brand-mark {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-border);
}

.primary-nav {
}

.nav-list {
  display: flex;
  gap: var(--space-3);
}

.nav-list a {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  font-weight: 700;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--color-accent);
}

@media (max-width: 900px) {
  .header-inner {
    min-height: 64px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-text {
    font-size: 1.125rem;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-surface);
    border-top: var(--border-width) solid var(--color-border);
    display: none;
  }

  .primary-nav.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--space-3);
  }
}