.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.filter-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: #314261;
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.portfolio-grid {
  display: grid;
  gap: 1rem;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid var(--border);
  min-height: 250px;
  box-shadow: var(--shadow-soft);
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  min-height: 250px;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: end;
  padding: 1rem;
  background: linear-gradient(to top, rgba(15, 31, 61, 0.78), rgba(15, 31, 61, 0.12) 65%, transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-info h3 {
  margin: 0;
  color: #fff;
  font-size: 1.1rem;
}

.project-info p {
  margin: 0.25rem 0 0;
  color: #d9e5f8;
  font-size: 0.9rem;
}

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

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

@media (min-width: 700px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .portfolio-item:nth-child(1),
  .portfolio-item:nth-child(4),
  .portfolio-item:nth-child(7) {
    grid-column: span 2;
  }
}