/* MODERN PORTFOLIO GRID - Estratto da style.css */
.portfolio-section {
  padding: 1.5rem 1.5rem; 
  max-width: 1200px; 
  margin: 0 auto;
}

.portfolio-controls {
  display: flex; 
  gap: 1rem; 
  margin-bottom: 1rem; 
  flex-wrap: nowrap; 
  align-items: center;
  justify-content: center;
}

#project-filter, #project-search {
  padding: 0.5rem 1rem; 
  border-radius: var(--border-radius); 
  border: 2px solid var(--border-color); 
  font-size: 1rem; 
  background: var(--surface);
  color: var(--text-primary);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

#project-filter:focus, #project-search:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: var(--shadow-hover);
}

.portfolio-grid { /* Definizione base */
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1rem;
  grid-auto-rows: 300px;
}

.project-card {
  background: var(--surface); 
  border-radius: var(--border-radius); 
  box-shadow: var(--shadow); 
  overflow: hidden; 
  transition: var(--transition);
  cursor: pointer; 
  position: relative;
}

/* Project hero image styling */
.project-hero-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 1.5rem 0;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease;
}

.project-hero-image:hover {
  transform: scale(1.02);
}

.project-card:hover {
  box-shadow: var(--shadow-hover);
}

.card-image-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.card-image-container img {
  width: 100%; 
  height: 100%;
  object-fit: cover; 
  transition: var(--transition);
  display: block;
  filter: brightness(1);
}

.project-card:hover .card-image-container img {
  filter: brightness(0.7);
}

.card-image-container::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, transparent 30%, rgba(0, 0, 0, 0.8) 100%);
  pointer-events: none;
  transition: var(--transition);
}

.card-image-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0);
  pointer-events: none;
  transition: var(--transition);
  z-index: 1;
}

.project-card:hover .card-image-container::before {
  background: rgba(0, 0, 0, 0.3);
}

/* 
  NOTA: Gli stili per .card-content, h3, p, .read-more 
  sono usati anche in .blog-card. 
  Per ora sono inclusi qui per completezza del refactoring del portfolio.
  Potrebbe essere necessario generalizzarli in un file comune in futuro.
*/
.card-content {
  padding: 2rem; 
  flex: 1; 
  display: flex; 
  flex-direction: column; 
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 2rem 1.5rem 2rem;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.card-title {
  font-family: 'Rubik', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: white;
  margin: 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  line-height: 1.3;
}

.card-description {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  max-height: 0;
  overflow: hidden;
  margin-top: 0.5rem;
}

.card-description p {
  color: white;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
}

.project-card:hover .card-description {
  opacity: 1;
  transform: translateY(0);
  max-height: 200px;
}

.card-content h3 {
  font-family: 'Rubik', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.card-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.card-content .read-more {
  color: var(--accent-color);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
}

.card-content .read-more:hover {
  text-decoration: underline;
}

.category {
  display: inline-block; 
  font-size: 0.85rem; 
  padding: 0.5rem 1rem; 
  border-radius: var(--border-radius); 
  margin-bottom: 1rem; 
  background: var(--accent-color);
  color: white; 
  text-transform: uppercase; 
  letter-spacing: 0.5px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.category.gis {
  background: linear-gradient(135deg, var(--accent-color) 0%, #2980b9 100%);
  box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.category.geologia {
  background: linear-gradient(135deg, var(--earth-color) 0%, #7d6608 100%);
  box-shadow: 0 2px 8px rgba(139, 115, 85, 0.3);
}

.category.ricerca {
  background: linear-gradient(135deg, var(--success-color) 0%, #1e8449 100%);
  box-shadow: 0 2px 8px rgba(39, 174, 96, 0.3);
}

/* ===== RESPONSIVE DESIGN - PORTFOLIO SECTION ===== */

/* Desktop Small (1024px and down) */
@media (max-width: 1024px) {
  .portfolio-section {
    padding: 1.2rem 1rem;
    max-width: 1000px;
  }
  
  .portfolio-controls {
    gap: 0.8rem;
    margin-bottom: 1.5rem;
  }
  
  #project-filter, #project-search {
    padding: 0.4rem 0.8rem;
    font-size: 0.95rem;
  }
  
  .portfolio-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
    grid-auto-rows: 280px;
  }
  
  .card-overlay {
    padding: 1.2rem 1.5rem 1.2rem 1.5rem;
  }
  
  .card-title {
    font-size: 1.3rem;
  }
  
  .card-description p {
    font-size: 0.85rem;
  }
  
  .category {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
    margin-bottom: 0.8rem;
  }
}

/* Mobile Large / Tablet (768px and down) */
@media (max-width: 768px) {
  .portfolio-section {
    padding: 1rem 0.8rem;
  }
  
  .portfolio-controls {
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.2rem;
    align-items: stretch;
  }
  
  #project-filter, #project-search {
    width: 100%;
    padding: 0.6rem 1rem;
    font-size: 1rem;
  }
  
  .portfolio-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.2rem;
    grid-auto-rows: 250px;
  }
  
  .card-overlay {
    padding: 1rem 1.2rem 1rem 1.2rem;
  }
  
  .card-title {
    font-size: 1.2rem;
  }
  
  .card-description p {
    font-size: 0.8rem;
  }
  
  .category {
    font-size: 0.75rem;
    padding: 0.3rem 0.7rem;
    margin-bottom: 0.8rem;
    display: inline-block;
  }
}

/* Mobile (480px and down) */
@media (max-width: 480px) {
  .portfolio-section {
    padding: 0.8rem 0.6rem;
  }
  
  .portfolio-controls {
    gap: 0.6rem;
    margin-bottom: 1rem;
  }
  
  #project-filter, #project-search {
    padding: 0.5rem 0.8rem;
    font-size: 0.9rem;
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    grid-auto-rows: 220px;
  }
  
  .card-overlay {
    padding: 0.8rem 1rem 0.8rem 1rem;
  }
  
  .card-title {
    font-size: 1.1rem;
  }
  
  .card-description p {
    font-size: 0.75rem;
  }
  
  .category {
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    margin-bottom: 0.6rem;
    letter-spacing: 0.3px;
  }
}