.portfolio-section {
  background: #0b0b0b;
  padding: 90px 40px;
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

.portfolio-header {
  text-align: center;
  margin-bottom: 60px;
}

.portfolio-header h5 {
  font-size: 16px;
  opacity: 0.8;
}

.portfolio-header h2 {
  font-size: 40px;
  margin: 10px 0 30px;
}

.portfolio-header h2 span {
  color: #b9ff00;
}

.filter-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.filter-buttons button {
  padding: 10px 22px;
  border-radius: 30px;
  background: transparent;
  border: 1px solid #fff;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
  font-size: 14px;
}

.filter-buttons button.active,
.filter-buttons button:hover {
  background: #ff5722;
  border-color: #ff5722;
}

/* GRID */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  background: #111;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: 0.4s;
}

.portfolio-item:hover img {
  transform: scale(1.08);
}

/* FILTER ANIMATION */
.portfolio-item.hide {
  display: none;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}