.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 10px;
    margin-left: 100px;
}

.portfolio-item {
    width: 400px;
    height: 400px;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.portfolio-item.show {
    opacity: 1;
    transform: translateY(0);
}

.item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.filter-btn {
    background: none;
    border: none;
    padding: 8px 20px;
    margin: 5px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    opacity: 0.7;
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    opacity: 1;
    background: #8cc052;
    color: white;
}