.portfolio-filter-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.portfolio-filters {
    text-align: center;
    margin-bottom: 30px;
}

.filter-button {
    background: none;
    border: none;
    padding: 10px 20px;
    margin: 0 5px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.filter-button.active {
    color: #3a3a3a;
    font-weight: bold;
}

.filter-button.active:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background-color: #3a3a3a;
}

.portfolio-items {
    display: flex;
    flex-wrap: wrap;
 }

.portfolio-item {
    width: calc(33.333% - 20px);
    position: relative;
    overflow: hidden;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin: 10px;
}

.portfolio-image img {
    width: 100%;
    height:400px;
    display: block;
    transition: transform 0.3s ease;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .portfolio-item {
        width: calc(50% - 20px);
    }
}

@media (max-width: 480px) {
    .portfolio-item {
        width: 100%;
    }
}