/* Portfolio List Page - Masonry Layout */
.portfolio-grid {
  column-count: 4;
  column-gap: var(--space-6);
  margin-top: var(--space-8);
}

.portfolio-card {
  break-inside: avoid;
  margin-bottom: var(--space-6);
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: portfolioFadeInUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  pointer-events: none; /* 애니메이션 중 클릭 방지 */
}

.portfolio-card {
  background: var(--color-bg);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* 순차적 애니메이션을 위한 지연 시간 */
.portfolio-card:nth-child(1) { animation-delay: 0.1s; }
.portfolio-card:nth-child(2) { animation-delay: 0.2s; }
.portfolio-card:nth-child(3) { animation-delay: 0.3s; }
.portfolio-card:nth-child(4) { animation-delay: 0.4s; }
.portfolio-card:nth-child(5) { animation-delay: 0.5s; }
.portfolio-card:nth-child(6) { animation-delay: 0.6s; }
.portfolio-card:nth-child(7) { animation-delay: 0.7s; }
.portfolio-card:nth-child(8) { animation-delay: 0.8s; }
.portfolio-card:nth-child(9) { animation-delay: 0.9s; }
.portfolio-card:nth-child(10) { animation-delay: 1.0s; }
.portfolio-card:nth-child(11) { animation-delay: 1.1s; }
.portfolio-card:nth-child(12) { animation-delay: 1.2s; }

@keyframes portfolioFadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto; /* 애니메이션 완료 후 클릭 가능 */
  }
}

.portfolio-card:hover {
  transform: translateY(-2px);
}

.portfolio-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.portfolio-image {
  position: relative;
  overflow: hidden;
}

.portfolio-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.05);
}

.portfolio-content {
  padding-top: var(--space-4);
}

.portfolio-title {
  margin: 0 0 var(--space-2);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-fg);
}

.portfolio-summary {
  margin: 0 0 var(--space-3);
  color: var(--color-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.portfolio-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.portfolio-meta time {
  font-style: normal;
}

/* 포트폴리오 카테고리 오버레이 스타일 */
.portfolio-category-overlay {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

.portfolio-category-overlay .category {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background: rgba(0, 0, 0, 0.9);
  color: white;
  font-size: 0.75rem;
  font-weight: 500;
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Responsive */
@media (max-width: 1200px) {
  .portfolio-grid {
    column-count: 3;
  }
}

@media (max-width: 768px) {
  .portfolio-grid {
    column-count: 2;
    column-gap: .5rem;
  }
  
  .portfolio-image img {
    height: 180px;
  }
  
  .portfolio-content {
    padding: 0;
  }
  
  .portfolio-title {
    font-size: 0.9rem;
    margin-bottom: 0;
  }
  .portfolio-summary{
    font-size: 0.6rem;
    margin-bottom: 0;
  }
  .portfolio-meta{
    font-size: 0.7rem;
  }
  .portfolio-category-overlay{
    top: .5rem;
    left: .5rem;
  }
}