/* =========================================
   Header Component
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: rgba(255, 255, 255, 0.6); /* Glassmorphism 기본 바탕 */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 로고 타이포그래피 (그라디언트 텍스트 효과) */
.header__logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text; /* 표준 구문 */
  letter-spacing: -0.02em;
}

/* 데스크탑 메뉴 */
.header__menu {
  display: flex;
  gap: 32px;
}

.header__menu-link {
  font-weight: 600;
  color: var(--color-text-main);
  transition: color var(--transition-fast);
  position: relative;
}

/* 호버 시 아래 밑줄 애니메이션 */
.header__menu-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

.header__menu-link:hover::after {
  width: 100%;
}

/* 햄버거 버튼 (기본 숨김 -> 모바일 노출) */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  z-index: 1001; /* 풀스크린 메뉴보다 위로 */
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-main);
  border-radius: 2px;
  transition: all var(--transition-fast);
  transform-origin: left center;
}

/* =========================================
   Hero / KV Area Component
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 72px; /* 헤더 높이 만큼 보정 */
  overflow: hidden;
  text-align: center;
}

/* 환상적인 그라디언트 및 블러 배경 */
.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: 
    radial-gradient(circle at top right, rgba(255, 117, 140, 0.15), transparent 50%),
    radial-gradient(circle at bottom left, rgba(138, 43, 226, 0.15), transparent 50%),
    var(--color-bg-base);
}

/* 배경 뒤에 은은하게 움직이는 펄스 요소 구현 */
.hero__bg::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(138, 43, 226, 0.08), transparent 60%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  animation: bgPulse 10s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
  filter: blur(40px);
}

@keyframes bgPulse {
  0% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.6; }
  100% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
}

.hero__desc {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 48px;
  font-weight: 500;
}

/* =========================================
   Tests (Card Grid Layout) Component
   ========================================= */
.tests {
  padding: 120px 0;
  position: relative;
  background-color: var(--color-bg-card); /* 흰 배경으로 분리 */
  border-top-left-radius: 40px;
  border-top-right-radius: 40px;
  margin-top: -40px; /* Hero 영역 위로 살짝 겹침 (최신 트렌드 구조) */
  box-shadow: 0 -10px 40px rgba(0,0,0,0.03);
  z-index: 2;
}

.tests__header {
  text-align: center;
  margin-bottom: 64px;
}

.tests__title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.tests__desc {
  color: var(--color-text-muted);
  font-size: 1.125rem;
}

.tests__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

/* =========================================
   Test Card UI
   ========================================= */
.test-card {
  background: var(--color-bg-card);
  border-radius: 28px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  cursor: pointer;
  z-index: 1; /* Before 요소보다 위 레이어 처리 */
}

/* 호버 시 상단에 얇은 그라데이션 선 애니메이션 */
.test-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 2;
}

.test-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.test-card:hover::before {
  opacity: 1;
}

/* 이모지 아이콘 스타일 */
.test-card__icon {
  font-size: 3.5rem;
  margin-bottom: 24px;
  background: var(--color-primary-light);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  transition: transform var(--transition-base);
}

.test-card:hover .test-card__icon {
  transform: scale(1.1) rotate(-5deg); /* 호버 시 위트있게 튕기는 느낌 */
}

.test-card__content {
  flex-grow: 1; /* 버튼을 하단에 고정하기 위해 늘림 */
  display: flex;
  flex-direction: column;
  width: 100%;
}

.test-card__title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--color-text-main);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.test-card__desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 28px;
}

/* 카드의 CTA 버튼 (Full Width) */
.test-card__btn {
  width: 100%;
  padding: 14px 20px;
  background-color: var(--color-primary-light); /* 연한 컬러 시작 */
  color: var(--color-primary-dark);
  font-weight: 700;
  text-align: center;
  border-radius: 16px;
  transition: all var(--transition-fast);
  margin-top: auto; /* Flex-grow 로 인해 하단 안착 확인 */
}

.test-card:hover .test-card__btn {
  background-color: var(--color-primary); /* 호버 시 강한 컬러 */
  color: white;
  box-shadow: var(--shadow-md);
}

/* =========================================
   Footer Component
   ========================================= */
.footer {
  padding: 40px 0;
  text-align: center;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-base);
  font-size: 0.9rem;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer__nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer__link {
  font-weight: 600;
  color: var(--color-text-main);
  transition: color var(--transition-fast);
}

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

.footer__copy {
  color: var(--color-text-muted);
}

/* 문의/정책 페이지 공통 레이아웃 */
.policy-page {
  min-height: 100vh;
  padding: 120px 0 80px;
  background: var(--color-bg-base);
}

.policy-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 28px;
  box-shadow: var(--shadow-md);
  padding: 40px 32px;
}

.policy-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.policy-updated {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.policy-section {
  margin-top: 24px;
}

.policy-section h2 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.policy-section p,
.policy-section li {
  color: var(--color-text-main);
  line-height: 1.7;
}

.policy-section ul {
  list-style: disc;
  margin-left: 20px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.contact-item {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 16px;
  background: #fff;
}

.contact-item strong {
  display: block;
  margin-bottom: 6px;
}

/* =========================================
   Responsive Design (미디어 쿼리)
   ========================================= */

/* 태블릿 구간 (1024px 이하) */
@media (max-width: 1024px) {
  .tests__grid {
    grid-template-columns: repeat(2, 1fr); /* 2열로 변경 */
  }
}

/* 모바일 구간 (768px 이하) */
@media (max-width: 768px) {
  /* 햄버거 메뉴 디스플레이 활성 */
  .header__hamburger {
    display: flex;
  }
  
  /* 모바일 풀스크린 네비게이션 트리거 */
  .header__nav {
    position: fixed;
    top: 72px; /* 헤더 바로 아래 */
    left: -100%;
    width: 100%;
    height: calc(100vh - 72px);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: left var(--transition-base);
    z-index: 999;
  }
  
  .header__nav.is-active {
    left: 0;
  }

  .header__menu {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 40px;
  }
  
  .header__menu-link {
    font-size: 1.75rem;
    font-weight: 700;
  }
  
  /* 햄버거 버튼 'X' 모양 전환 애니메이션 */
  .header__hamburger.is-active span:nth-child(1) {
    transform: rotate(45deg);
  }
  .header__hamburger.is-active span:nth-child(2) {
    opacity: 0;
  }
  .header__hamburger.is-active span:nth-child(3) {
    transform: rotate(-45deg);
  }

  /* 히어로 섹션 모바일 최적화 */
  .hero {
    padding-top: 72px;
    min-height: auto;
    padding-bottom: 60px;
  }
  
  .hero__content {
    padding: 0 16px;
  }

  /* 본문 영역 모바일 스페이싱 */
  .tests {
    padding: 60px 0 140px; /* 하단 광고 공간 확보 */
    border-top-left-radius: 32px;
    border-top-right-radius: 32px;
    margin-top: -20px;
  }

  .tests__header {
    margin-bottom: 40px;
    padding: 0 16px;
  }

  .tests__grid {
    gap: 20px;
    padding: 0 16px;
  }

  .test-card {
    padding: 24px;
    border-radius: 20px;
  }
  
  .test-card__icon {
    width: 64px;
    height: 64px;
    font-size: 2.5rem;
    border-radius: 20px;
  }

  .footer {
    padding: 32px 0 140px; /* 하단 광고 공간 확보 */
  }

  .footer__nav {
    gap: 12px;
  }

  .policy-card {
    padding: 28px 20px;
    border-radius: 20px;
    margin: 0 16px;
  }
}

/* 작은 모바일 (480px 이하) */
@media (max-width: 480px) {
  .hero {
    padding-top: 60px; /* 공간 절약 */
  }

  .hero__title {
    font-size: 2.25rem;
  }
  
  .tests__title {
    font-size: 1.75rem;
  }

  .tests__grid {
    grid-template-columns: 1fr; /* 1열 (상하 스크롤) */
  }
}

/* =========================================
   SEO 아코디언 컴포넌트 (details/summary 기반)
   ========================================= */
.seo-section {
  max-width: 900px;
  margin: 60px auto;
  padding: 0 24px;
  color: var(--color-text-main);
}

.seo-section__header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}

.seo-section__title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.seo-section__desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.seo-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.seo-accordion-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-base);
}

.seo-accordion-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.seo-accordion summary {
  list-style: none;
  cursor: pointer;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text-main);
  background: var(--color-bg-card);
  transition: background var(--transition-fast);
  position: relative;
}

.seo-accordion summary::-webkit-details-marker {
  display: none;
}

.seo-accordion summary::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.seo-accordion-item[open] summary::before {
  opacity: 1;
}

.seo-accordion summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.seo-accordion-item[open] summary::after {
  transform: rotate(45deg);
}

.seo-accordion summary:hover {
  background: var(--color-primary-light);
}

.seo-accordion-content {
  padding: 0 28px 28px;
  line-height: 1.8;
  color: var(--color-text-main);
  font-size: 1.05rem;
}

.seo-accordion-content p {
  margin-bottom: 16px;
  word-break: keep-all;
}

.seo-accordion-content p:last-child {
  margin-bottom: 0;
}

.seo-accordion-content ul,
.seo-accordion-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.seo-accordion-content li {
  margin-bottom: 12px;
  word-break: keep-all;
}

.seo-accordion-content strong {
  color: var(--color-primary-dark);
  font-weight: 800;
  background: rgba(138, 43, 226, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.seo-accordion-content a {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.seo-accordion-content a:hover {
  color: var(--color-primary-dark);
}

/* 모바일 반응형 */
@media (max-width: 768px) {
  .seo-section {
    margin: 40px auto;
    padding: 0 16px;
  }

  .seo-section__title {
    font-size: 1.5rem;
  }

  .seo-section__desc {
    font-size: 1rem;
  }

  .seo-accordion summary {
    padding: 20px 20px;
    font-size: 1.05rem;
  }

  .seo-accordion-content {
    padding: 0 20px 20px;
    font-size: 1rem;
  }
}

/* 중첩 아코디언 스타일 */
.seo-accordion-content .seo-accordion {
  margin-top: 16px;
  margin-bottom: 16px;
}

.seo-accordion-content .seo-accordion-item {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border-light);
  border-radius: 16px;
}

.seo-accordion-content .seo-accordion summary {
  padding: 18px 24px;
  font-size: 1rem;
}

.seo-accordion-content .seo-accordion-content {
  padding: 0 24px 24px;
  font-size: 1rem;
}

.seo-accordion-content .seo-accordion summary::before {
  left: 0;
  width: 3px;
}

.seo-accordion-content .seo-accordion-item[open] summary::before {
  opacity: 0.7;
}

/* 문의 폼 스타일 */
.contact-form-wrapper {
  margin-top: 32px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  color: var(--color-text-base);
  font-size: 1rem;
}

.form-group .required {
  color: var(--color-point);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
  padding: 16px;
  border: 2px solid var(--color-border-light);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background: var(--color-bg-base);
  color: var(--color-text-base);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="url"]:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-point);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.form-hint {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

.checkbox-group {
  flex-direction: row;
  align-items: flex-start;
  gap: 12px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-point);
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.form-actions .btn {
  flex: 1;
}

/* 폼 성공 메시지 */
.form-success {
  text-align: center;
  padding: 48px 24px;
  background: var(--color-bg-base);
  border-radius: 16px;
  border: 2px solid var(--color-border-light);
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--color-success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: bold;
}

.form-success h3 {
  font-size: 1.5rem;
  color: var(--color-text-base);
  margin-bottom: 12px;
}

.form-success p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* 모바일 반응형 */
@media (max-width: 768px) {
  .contact-form {
    gap: 20px;
  }

  .form-group input[type="text"],
  .form-group input[type="email"],
  .form-group input[type="url"],
  .form-group select,
  .form-group textarea {
    padding: 14px;
    font-size: 0.95rem;
  }

  .form-actions {
    flex-direction: column;
  }

  .form-success {
    padding: 32px 16px;
  }

  .success-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .form-success h3 {
    font-size: 1.25rem;
  }
}