.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 20px;
}

.logo {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  flex: 1;
}

.main-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 10px;
  gap: 6px;
}

.search-box input {
  border: none;
  outline: none;
  font-size: 14px;
  width: 140px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
}

@media (max-width: 860px) {
  .main-nav {
    display: none;
    width: 100%;
    order: 3;
    flex-direction: column;
    gap: 0;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .menu-toggle {
    display: block;
  }

  .header-inner {
    flex-wrap: wrap;
  }
}