/* Post Cards Styles */
.posts-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.post {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.post:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  border-color: transparent;
}

.post:hover::before {
  transform: scaleX(1);
}

.post-title {
  margin-bottom: 1rem;
  font-size: 1.4rem;
  line-height: 1.3;
}

.post-title a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.post-title a:hover {
  color: var(--link-color);
  text-decoration: none;
}

.post-excerpt {
  color: var(--text-color);
  opacity: 0.8;
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-categories {
  margin: 1rem 0;
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-tag {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: var(--accent-bg);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-color);
  opacity: 0.9;
  transition: all 0.3s ease;
}

.category-tag:hover {
  transform: scale(1.05);
  opacity: 1;
}

.post-date {
  font-size: 0.85rem;
  color: var(--text-color);
  opacity: 0.6;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.post-date::before {
  content: '📅';
  font-size: 1rem;
}

/* Special styling for paper summaries */
.post[data-categories*="paper-summary"] {
  border-left: 3px solid #667eea;
}

.post[data-categories*="paper-summary"] .post-title::before {
  content: '📄';
  margin-right: 0.5rem;
}

/* Special styling for short-form posts */
.post[data-categories*="short-form"] {
  border-left: 3px solid #764ba2;
}

.post[data-categories*="short-form"] .post-title::before {
  content: '💭';
  margin-right: 0.5rem;
}

/* Featured posts */
.post.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

/* Dark mode adjustments */
[data-theme="dark"] .post {
  background: var(--accent-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .post:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .posts-container {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  
  .post.featured {
    grid-column: span 1;
  }
}

/* Loading animation */
@keyframes cardLoad {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post {
  animation: cardLoad 0.6s ease-out;
  animation-fill-mode: both;
}

.post:nth-child(1) { animation-delay: 0.1s; }
.post:nth-child(2) { animation-delay: 0.2s; }
.post:nth-child(3) { animation-delay: 0.3s; }
.post:nth-child(4) { animation-delay: 0.4s; }
.post:nth-child(5) { animation-delay: 0.5s; }
.post:nth-child(6) { animation-delay: 0.6s; }