/* ========================================
   BLOG SECTION - 트렌디 카드 스로틀 & Glassmorphism
   ======================================== */

.blog {
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
  position: relative;
}

.blog::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="blog-pattern" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%2329B8B1" opacity="0.05"/></pattern></defs><rect width="100" height="100" fill="url(%23blog-pattern)"/></svg>');
  opacity: 0.3;
  pointer-events: none;
}

.blog__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 2;
}

.blog__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.blog__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-4);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 4px rgba(29, 136, 177, 0.2);
  filter: drop-shadow(0 1px 2px rgba(45, 90, 160, 0.3));
}

.blog__subtitle {
  font-size: var(--font-size-xl);
  color: #475569;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
  font-weight: var(--font-weight-medium);
  text-shadow: 0 1px 2px rgba(71, 85, 105, 0.1);
}

/* ========================================
   BLOG SCROLL CONTAINER - 스크롤 컨테이너
   ======================================== */

.blog__scroll-container {
  margin-top: var(--space-12);
  padding-bottom: var(--space-4);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  position: relative;
}

.blog__scroll-container::-webkit-scrollbar {
  display: none;
}

.blog__scroll-container:active {
  cursor: grabbing;
}

.blog__scroll-container * {
  user-select: none;
}

.blog__scroll-container .blog-card {
  cursor: grab;
}

.blog__scroll-container.can-scroll::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 60px;
  background: linear-gradient(90deg, transparent 0%, var(--color-primary-50) 100%);
  pointer-events: none;
  z-index: 1;
}

/* ========================================
   BLOG GRID - 블로그 그리드
   ======================================== */

.blog__grid {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-2) 0;
  min-width: max-content;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
}

/* ========================================
   BLOG CARD - 블로그 카드
   ======================================== */

.blog-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(29, 136, 177, 0.1);
  border-radius: var(--border-radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-duration-300) var(--transition-timing-function-ease);
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 480px;
  min-width: 320px;
  max-width: 380px;
  flex-shrink: 0;
  scroll-snap-align: start;
  -webkit-scroll-snap-align: start;
  backdrop-filter: blur(10px);
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(29, 136, 177, 0.15), 0 4px 16px rgba(0, 0, 0, 0.1);
  border-color: rgba(29, 136, 177, 0.2);
}

.blog-card:hover::before {
  transform: scaleX(1);
}

/* ========================================
   BLOG CARD IMAGE - 카드 이미지
   ======================================== */

.blog-card__image {
  position: relative;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
}

.blog-card__image img,
.blog-card__image picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-duration-300) var(--transition-timing-function-ease);
}

.blog-card__image picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.blog-card:hover .blog-card__image img,
.blog-card:hover .blog-card__image picture img {
  transform: scale(1.05);
}

.blog-card__category {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--border-radius-full);
  font-size: 0.75rem; /* 12px */
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(29, 136, 177, 0.3);
}

/* ========================================
   BLOG CARD OVERLAY - 카드 오버레이
   ======================================== */

.blog-card__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.blog-card:hover .blog-card__overlay {
  opacity: 1;
}

.blog-card__overlay-content {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.blog-card__play-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--brand-primary);
}

/* ========================================
   BLOG CARD CONTENT - 카드 내용
   ======================================== */

.blog-card__content {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: 0.75rem; /* 12px */
  color: var(--color-neutral-500);
}

.blog-card__date {
  font-weight: var(--font-weight-medium);
}

.blog-card__read-time {
  display: flex;
  align-items: center;
  font-weight: var(--font-weight-medium);
}

.blog-card__read-time::before {
  content: '•';
  margin-right: var(--space-2);
  color: var(--brand-primary);
}

.blog-card__title {
  font-size: 1.125rem; /* 18px */
  font-weight: var(--font-weight-bold);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-3);
  line-height: 1.4;
  flex-shrink: 0;
}

.blog-card__excerpt {
  font-size: 0.875rem; /* 14px - SEO 최적 크기 */
  color: var(--color-neutral-700);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex: 1;
}

.blog-card__excerpt strong {
  color: var(--brand-primary);
  font-weight: var(--font-weight-bold);
}

/* ========================================
   BLOG CARD AUTHOR - 작성자 정보
   ======================================== */

.blog-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding: var(--space-3);
  background: rgba(29, 136, 177, 0.05);
  border-radius: var(--border-radius-lg);
  flex-shrink: 0;
}

.blog-card__author-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}

.blog-card__author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card__author-info {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card__author-name {
  font-size: 0.875rem; /* 14px */
  font-weight: var(--font-weight-bold);
  color: var(--color-neutral-900);
  line-height: 1.2;
}

.blog-card__author-title {
  font-size: 0.75rem; /* 12px */
  color: var(--color-neutral-600);
  line-height: 1.2;
}

/* ========================================
   BLOG CARD LINK - 링크 버튼
   ======================================== */

.blog-card__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--brand-primary);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
  font-size: 0.875rem; /* 14px */
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  color: white;
  border-radius: var(--border-radius-lg);
  transition: all 0.3s ease;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(29, 136, 177, 0.3);
}

.blog-card__link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(29, 136, 177, 0.4);
  color: white;
  text-decoration: none;
}

.blog-card__link-icon {
  width: 1rem;
  height: 1rem;
  transition: transform 0.3s ease;
}

.blog-card__link:hover .blog-card__link-icon {
  transform: translateX(4px);
}

/* ========================================
   BLOG CTA - CTA 섹션
   ======================================== */

.blog__cta {
  text-align: center;
  margin-top: var(--space-16);
}

/* ========================================
   RESPONSIVE STYLES - 반응형 스타일
   ======================================== */

@media (min-width: 769px) {
  .blog__scroll-container {
    margin-top: var(--space-16);
  }
  
  .blog__grid {
    gap: var(--space-8);
  }
  
  .blog-card {
    min-height: 520px;
    min-width: 360px;
    max-width: 420px;
  }
  
  .blog-card__content {
    padding: var(--space-6);
  }
  
  .blog-card__title {
    font-size: 1.25rem; /* 20px */
  }
  
  .blog-card__excerpt {
    font-size: var(--font-size-base);
  }
  
  .blog-card__author {
    padding: var(--space-4);
  }
  
  .blog-card__author-avatar {
    width: 3rem;
    height: 3rem;
  }
  
  .blog-card__author-name {
    font-size: var(--font-size-base);
  }
  
  .blog-card__author-title {
    font-size: 0.875rem;
  }
  
  .blog-card__link {
    font-size: var(--font-size-base);
    padding: var(--space-4) var(--space-5);
  }
}

/* ========================================
   BLOG ANIMATIONS - 블로그 애니메이션
   ======================================== */

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.blog-card {
  animation: fade-in-up 0.6s ease-out;
}

.blog-card:nth-child(1) { animation-delay: 0.1s; }
.blog-card:nth-child(2) { animation-delay: 0.2s; }
.blog-card:nth-child(3) { animation-delay: 0.3s; }
.blog-card:nth-child(4) { animation-delay: 0.4s; }