/* ===========================
   Modern Intro Page Design
   =========================== */

.modern-intro-page {
  min-height: 100vh;
  padding: 120px 20px 80px;
  position: relative;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

/* Service Page Background - 범용진단기 (AUTEL 제품 라인업) */
.modern-intro-page:has(.diagnostic-card) {
  background-image: url('/static/images/diagnostic-bg.jpg?v=4');
}

/* Support Page Background - 하이팁스 (슬라이드3 이미지) */
.modern-intro-page:has(.tips-card) {
  background-image: url('/static/images/tips-bg.jpg?v=4');
}

/* 어두운 오버레이 (텍스트 가독성 향상) */
.modern-intro-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.45);
  pointer-events: none;
  z-index: 0;
}

.intro-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}

/* ===========================
   Service Cards
   =========================== */

.service-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  border-radius: 32px;
  padding: 0;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.25),
    0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  overflow: hidden;
  position: relative;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 
    0 30px 80px rgba(0, 0, 0, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.8) inset;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--card-color-1), var(--card-color-2));
  opacity: 0;
  transition: opacity 0.4s ease;
}

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

.diagnostic-card {
  --card-color-1: #667eea;
  --card-color-2: #764ba2;
}

.tips-card {
  --card-color-1: #0066ff;
  --card-color-2: #0052cc;
}

/* ===========================
   Card Header
   =========================== */

.card-header {
  padding: 50px 40px 30px;
  text-align: center;
  background: linear-gradient(180deg, rgba(102, 126, 234, 0.03) 0%, rgba(255, 255, 255, 0) 100%);
}

.icon-wrapper {
  width: 100px;
  height: 100px;
  margin: 0 auto 24px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.4s ease;
}

.icon-wrapper::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--card-color-1), var(--card-color-2));
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.service-card:hover .icon-wrapper::before {
  opacity: 1;
}

.diagnostic-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.tips-icon {
  background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
}

.icon-wrapper i {
  font-size: 2.8rem;
  color: white;
  transition: transform 0.4s ease;
}

.service-card:hover .icon-wrapper i {
  transform: scale(1.1) rotate(5deg);
}

.card-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #1a202c;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.card-subtitle {
  font-size: 1rem;
  color: #718096;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===========================
   Card Body
   =========================== */

.card-body {
  padding: 30px 40px 50px;
}

.card-description {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #4a5568;
  margin-bottom: 32px;
  text-align: center;
}

.card-description strong {
  color: #667eea;
  font-weight: 700;
}

/* ===========================
   Features Grid
   =========================== */

.features-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: linear-gradient(135deg, #f7fafc 0%, #ffffff 100%);
  border-radius: 16px;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--card-color-1), var(--card-color-2));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-item:hover {
  border-color: var(--card-color-1);
  transform: translateX(8px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.feature-item:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--card-color-1), var(--card-color-2));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon i {
  font-size: 1.4rem;
  color: white;
}

.feature-text {
  flex: 1;
}

.feature-text h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 4px;
}

.feature-text p {
  font-size: 0.9rem;
  color: #718096;
  margin: 0;
}

/* ===========================
   Card Button
   =========================== */

.card-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 18px 32px;
  border-radius: 16px;
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  color: white;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  border: none;
  cursor: pointer;
}

.diagnostic-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.tips-btn {
  background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.4);
}

.card-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.card-button:hover::before {
  left: 100%;
}

.card-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(102, 126, 234, 0.5);
}

.card-button i {
  transition: transform 0.3s ease;
}

.card-button:hover i {
  transform: translateX(5px);
}

.access-notice {
  margin-top: 16px;
  text-align: center;
  font-size: 0.9rem;
  color: #e53e3e;
  font-weight: 600;
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 1200px) {
  .intro-container {
    gap: 30px;
  }
  
  .card-header {
    padding: 40px 30px 24px;
  }
  
  .card-body {
    padding: 24px 30px 40px;
  }
}

@media (max-width: 968px) {
  .modern-intro-page {
    padding: 100px 16px 60px;
  }
  
  .intro-container {
    grid-template-columns: 1fr;
    gap: 30px;
    max-width: 600px;
  }
  
  .service-card {
    border-radius: 24px;
  }
  
  .card-header {
    padding: 36px 24px 20px;
  }
  
  .icon-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 20px;
  }
  
  .icon-wrapper i {
    font-size: 2.2rem;
  }
  
  .card-title {
    font-size: 1.8rem;
  }
  
  .card-subtitle {
    font-size: 0.9rem;
  }
  
  .card-body {
    padding: 20px 24px 36px;
  }
  
  .card-description {
    font-size: 1rem;
    margin-bottom: 24px;
  }
  
  .features-grid {
    gap: 12px;
  }
  
  .feature-item {
    padding: 16px;
  }
  
  .feature-icon {
    width: 44px;
    height: 44px;
  }
  
  .feature-icon i {
    font-size: 1.2rem;
  }
  
  .feature-text h4 {
    font-size: 1rem;
  }
  
  .feature-text p {
    font-size: 0.85rem;
  }
  
  .card-button {
    padding: 16px 28px;
    font-size: 1.05rem;
  }
}

@media (max-width: 480px) {
  .modern-intro-page {
    padding: 90px 12px 50px;
  }
  
  .card-header {
    padding: 30px 20px 16px;
  }
  
  .icon-wrapper {
    width: 70px;
    height: 70px;
    border-radius: 18px;
  }
  
  .icon-wrapper i {
    font-size: 2rem;
  }
  
  .card-title {
    font-size: 1.6rem;
  }
  
  .card-subtitle {
    font-size: 0.85rem;
  }
  
  .card-body {
    padding: 16px 20px 30px;
  }
  
  .card-description {
    font-size: 0.95rem;
    line-height: 1.7;
  }
  
  .feature-item {
    padding: 14px;
    gap: 12px;
  }
  
  .feature-icon {
    width: 40px;
    height: 40px;
  }
  
  .card-button {
    padding: 14px 24px;
    font-size: 1rem;
  }
}


/* ===========================
   Single Card Layout
   =========================== */

.intro-container.single-card {
  grid-template-columns: 1fr;
  max-width: 1200px;
}

.intro-container.single-card .service-card {
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  align-items: stretch;
}

/* 가로 레이아웃: 왼쪽 아이콘 영역 */
.intro-container.single-card .card-header {
  flex: 0 0 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 50px 30px;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
  border-right: 2px solid rgba(0, 0, 0, 0.05);
}

/* 가로 레이아웃: 오른쪽 컨텐츠 영역 */
.intro-container.single-card .card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 50px 50px;
}

/* 가로 레이아웃: 설명 텍스트 왼쪽 정렬 */
.intro-container.single-card .card-description {
  text-align: left;
  margin-bottom: 24px;
}

/* 가로 레이아웃: 기능 그리드를 3열로 */
.intro-container.single-card .features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.intro-container.single-card .feature-item {
  flex-direction: column;
  text-align: center;
  padding: 20px 16px;
}

.intro-container.single-card .feature-item:hover {
  transform: translateY(-5px);
}

/* 가로 레이아웃: 버튼 크기 조정 */
.intro-container.single-card .card-button {
  max-width: 400px;
}


/* ===========================
   Background Images - Full Page
   배경 이미지는 전체 페이지에 적용됨
   =========================== */

/* Diagnostic Card - 카드 내 배경 제거 */
.diagnostic-card {
  position: relative;
  overflow: hidden;
}

/* Tips Card - 카드 내 배경 제거 */
.tips-card {
  position: relative;
  overflow: hidden;
}



/* ===========================
   가로 레이아웃 반응형
   =========================== */

@media (max-width: 1024px) {
  .intro-container.single-card .card-header {
    flex: 0 0 250px;
    padding: 40px 24px;
  }
  
  .intro-container.single-card .card-body {
    padding: 40px 40px;
  }
  
  .intro-container.single-card .features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .intro-container.single-card .service-card {
    flex-direction: column;
  }
  
  .intro-container.single-card .card-header {
    flex: none;
    border-right: none;
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
    padding: 40px 30px 30px;
  }
  
  .intro-container.single-card .card-body {
    padding: 30px 30px 40px;
  }
  
  .intro-container.single-card .card-description {
    text-align: center;
  }
  
  .intro-container.single-card .features-grid {
    grid-template-columns: 1fr;
  }
  
  .intro-container.single-card .feature-item {
    flex-direction: row;
    text-align: left;
  }
  
  .intro-container.single-card .card-button {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .intro-container.single-card .card-header {
    padding: 30px 20px 24px;
  }
  
  .intro-container.single-card .card-body {
    padding: 24px 20px 30px;
  }
}