.portfolio-section {
  padding: var(--spacing-4xl) 0;
  background: var(--color-bg-secondary);
  min-height: calc(100vh - 200px);
}

/* Filter Container */
.filter-container {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.filter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.filter-header h2 {
  font-size: var(--font-size-2xl);
  margin: 0;
}

.project-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
}

/* Filter Buttons */
.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  background: var(--color-bg-primary);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.filter-btn svg {
  flex-shrink: 0;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Project Card */
.project-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  opacity: 1;
  transform: scale(1);
}

.project-card.hidden {
  display: none;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent);
}

.project-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.project-content {
  padding: var(--spacing-xl);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.project-category {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-award {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: #fef3c7;
  color: #92400e;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.project-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
  line-height: 1.3;
}

.project-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.view-details {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: gap var(--transition-base);
}

.project-card:hover .view-details {
  gap: var(--spacing-sm);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.3s ease;
}

.modal-content {
  position: relative;
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
  box-shadow: var(--shadow-xl);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: 1;
}

.modal-close:hover {
  background: var(--color-primary);
  color: white;
  transform: rotate(90deg);
}

.modal-body {
  padding: var(--spacing-3xl);
}

.modal-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-2xl);
}

.modal-header {
  margin-bottom: var(--spacing-2xl);
}

.modal-badges {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.modal-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.modal-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
}

.modal-section {
  margin-bottom: var(--spacing-2xl);
}

.modal-section h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.modal-section ul {
  list-style: none;
  padding: 0;
}

.modal-section li {
  padding: var(--spacing-sm) 0;
  color: var(--color-text-secondary);
  line-height: 1.6;
  position: relative;
  padding-left: var(--spacing-lg);
}

.modal-section li:before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-4xl);
  background: var(--color-bg-primary);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  grid-column: 1 / -1;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.empty-state p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Adjustments */
@media (max-width: 767px) {
  .filter-container {
    padding: var(--spacing-lg);
  }

  .filter-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-buttons {
    width: 100%;
  }

  .filter-btn {
    flex: 1 1 auto;
    min-width: calc(50% - var(--spacing-xs));
    justify-content: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .modal {
    padding: var(--spacing-md);
  }

  .modal-body {
    padding: var(--spacing-xl);
  }

  .modal-image {
    height: 250px;
  }

  .modal-title {
    font-size: var(--font-size-3xl);
  }
}