.portfolio-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 40px;
}

.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 8px 24px;
  border-radius: 100px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}

.portfolio-item {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-image-wrap {
  height: 220px;
  position: relative;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 15, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: var(--transition);
}

.portfolio-item:hover .project-overlay {
  opacity: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.tech-tag {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: #fff;
}

.project-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-meta {
  margin-bottom: 12px;
}

.project-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 1px;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.project-links {
  display: flex;
  gap: 16px;
}

.project-link {
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.project-link:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

@media (max-width: 480px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}