/* Portfolio Container */
.portfolio-container {
  margin: 2rem 0;
}

/* Filter Buttons */
.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2rem;
  padding: 1rem 0;
}

.filter-btn {
  background-color: transparent;
  border: var(--border-interactive);
  border-radius: 25px;
  color: var(--primary-color);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1.5rem;
  transition: all 0.3s ease;
}

.filter-btn:hover {
  background-color: #e0e0e0;
  transform: translateY(-2px);
}

.filter-btn.active {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

/* Force 2 columns max at medium screens */
@media (min-width: 768px) and (max-width: 1199px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Allow 3 columns only at large screens */
@media (min-width: 1200px) {
  .portfolio-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

/* Portfolio Item (Tile) */
.portfolio-item {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.4s ease;
}

.portfolio-item.hidden {
  display: none;
}

.portfolio-item.fade-out {
  opacity: 0;
  transform: scale(0.95);
}

.portfolio-tile {
  background: white;
  border-radius: var(--border-radius);
  border: var(--border-interactive);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  transition: all 0.3s ease;
}

.portfolio-tile:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  transform: translateY(-4px);
}

/* Portfolio Image */
.portfolio-image {
  aspect-ratio: 16 / 9;
  background-color: #f5f5f5;
  overflow: hidden;
  position: relative;
  border-bottom: var(--border-interactive);
}

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

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

/* Portfolio Content */
.portfolio-content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  padding: 1.5rem;
}

.portfolio-meta {
  display: flex;
  font-size: 0.85rem;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.portfolio-category {
  background-color: var(--accent-color);
  border-radius: 4px;
  color: white;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  text-transform: uppercase;
}

.portfolio-publication {
  color: #999;
  font-style: italic;
}

.portfolio-title {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 0 0 1rem;
}

.portfolio-title a {
  color: #333;
  text-decoration: none;
  transition: color 0.2s ease;
}

.portfolio-title a:hover {
  color: var(--primary-color);
}

.portfolio-description {
  color: #666;
  flex-grow: 1;
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.portfolio-date {
  color: #999;
  font-size: 0.85rem;
  margin-top: auto;
}

/* Loading Indicator */
.portfolio-loading {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  padding: 3rem;
  text-align: center;
}

.loading-spinner {
  animation: spin 1s linear infinite;
  border: 3px solid #f3f3f3;
  border-radius: 50%;
  border-top: 3px solid var(--primary-color);
  height: 40px;
  width: 40px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Continuous Scroll Animation */
.portfolio-item.new-item {
  animation: slideIn 0.5s ease forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 1200px) {
  .portfolio-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 0;
    margin: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
  }
  
  .portfolio-item {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
    padding: 0 1rem; /* Add padding to the item instead */
  }
  
  .portfolio-tile {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
  }
  
  .portfolio-content {
    padding: 1rem; /* Reduce padding on mobile */
  }
  
  .portfolio-title {
    font-size: 1.1rem; /* Slightly smaller title */
    word-wrap: break-word;
  }
  
  .portfolio-description {
    font-size: 0.9rem; /* Slightly smaller description */
    word-wrap: break-word;
  }
  
  .portfolio-filters {
    gap: 0.5rem;
    padding: 0.5rem;
  }
  
  .filter-btn {
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
  }
  
  /* Ensure section container doesn't overflow */
  .writing-section {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    box-sizing: border-box;
  }
  
  .writing-section .section-container {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    padding: 0 1rem;
    box-sizing: border-box;
  }
  
  .portfolio-title {
    font-size: 1.1rem;
  }
  
  .portfolio-description {
    font-size: 0.9rem;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .portfolio-tile {
    background: #1a1a1a;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  }
  
  .portfolio-tile:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  }
  
  .portfolio-title a {
    color: #e0e0e0;
  }
  
  .portfolio-title a:hover {
    color: #4db8ff;
  }
  
  .portfolio-description {
    color: #b0b0b0;
  }
  
  .filter-btn {
    background-color: #2a2a2a;
    color: #e0e0e0;
  }
  
  .filter-btn:hover {
    background-color: #3a3a3a;
  }
  
  .portfolio-category {
    background-color: #2a2a2a;
    color: #b0b0b0;
  }
}