.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.container.header-inner {
  width: min(1100px, 92%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.logo {
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  color: #111827;
}

.quit {
  color: #22c55e;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: #374151;
  font-weight: 500;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #111827;
}

.nav-link.active {
  color: #111827;
  font-weight: 700;
  border-bottom: 2px solid #111827;
}

@media (max-width: 768px) {
  .container.header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .main-nav {
    gap: 14px;
  }
}