.top-header {
  position: sticky;
  top: 0;
  background-color: white;
  padding: 16px 20px;
  border-bottom: 1px solid #f0f0f0;
  z-index: 1000;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.top-container {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.icon-button {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: 8px;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
}

.icon-button:hover {
  background-color: #f5f5f5;
}

.icon-button img {
  width: 32px;
  height: 32px;
  opacity: 0.8;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.logo:hover {
  opacity: 0.8;
}

.logo img {
  height: 48px;
  width: auto;
  max-width: 240px;
}

.icon-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 모바일 최적화 */
@media (max-width: 768px) {
  .top-header {
    padding: 12px 16px;
  }

  .top-container {
    gap: 12px;
  }

  .icon-button {
    padding: 6px;
  }

  .icon-button img {
    width: 28px;
    height: 28px;
  }

  .logo img {
    height: 40px;
    max-width: 200px;
  }

  .icon-group {
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .top-header {
    padding: 10px 12px;
  }

  .icon-button img {
    width: 24px;
    height: 24px;
  }

  .logo img {
    height: 36px;
    max-width: 180px;
  }
}