/* 헤더 스타일 */
:root {
  --primary-color: #53B2AC;
  --primary-dark: #129c8b;
  --primary-light: #edf8f6;
  --secondary-color: #1e1e1e;
  --text-color: #333;
  --text-light: #666;
  --background-color: #fff;
  --background-light: #f9f9f9;
  --border-color: #e0e0e0;
  --shadow-color: rgb(0 0 0 / 10%);
  --transition: all 0.3s ease;
}

.header {
  background-color: var(--background-color);
  box-shadow: 0 2px 10px rgb(0 0 0 / 5%);
  position: sticky;
  top: 0;
  z-index: 1200;
  padding: 16px 0;
  transition: var(--transition);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  transition: var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 80%;
}

.auth-links {
  display: flex;
  gap: 12px;
  margin-left: 16px;
}

.login-btn, .profile-btn {
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
  background-color: transparent;
}

.login-btn:hover, .profile-btn:hover {
  background-color: var(--primary-light);
}

.signup-btn, .logout-btn {
  color: white;
  background-color: var(--primary-color);
}

.signup-btn:hover, .logout-btn:hover {
  background-color: var(--primary-dark);
}

/* 모바일 메뉴 토글 버튼 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-color);
  border-radius: 3px;
  transition: var(--transition);
}

/* 스크롤 시 헤더 스타일 변경 */
.header.scrolled {
  padding: 12px 0;
  background-color: rgb(255 255 255 / 95%);
  backdrop-filter: blur(10px);
}

.header.scrolled .logo img {
  height: 36px;
}

/* 반응형 디자인 */
@media (width <= 992px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 30px 30px;
    box-shadow: -5px 0 15px rgb(0 0 0 / 10%);
    transition: var(--transition);
    z-index: 1000;
    gap: 16px;
  }

  .nav.active {
    right: 0;
  }

  .nav-link {
    width: 100%;
  }

  .nav-link::after {
    display: none;
  }

  .auth-links {
    flex-direction: column;
    margin-left: 0;
    width: 100%;
    margin-top: 16px;
  }

  .auth-link-user, .auth-link-guest {
    width: 100%;
    text-align: center;
  }

  /* 메뉴 토글 활성화 시 햄버거 아이콘을 X로 변경 */
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  /* 메뉴 활성화 시 배경 오버레이 */
  .menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgb(0 0 0 / 50%);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }
}

@media (width <= 480px) {
  .header-container {
    padding: 0 16px;
  }

  .logo img {
    height: 32px;
  }
}