.portfolio_grid_lt ul {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.4rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.portfolio_item {
    cursor: pointer;
    transition: 0.3s;
}

.portfolio_item .item_inner {
    display: block;
    text-decoration: none;
    background: #fff;
    border: 1px solid #eee;
    overflow: hidden;
    border-radius: 1.2rem;
    transition: 0.4s;
}

.portfolio_item:hover .item_inner {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: #004c97;
}

.portfolio_item .img_box {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.portfolio_item .img_box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

.portfolio_item:hover .img_box img {
    transform: scale(1.1);
}

.portfolio_item .overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 76, 151, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: 0.3s;
}

.portfolio_item:hover .overlay {
    opacity: 1;
}

.portfolio_item .overlay span {
    color: #fff;
    font-size: 1.8rem;
    font-weight: 700;
}

.portfolio_item .txt_box {
    padding: 2.5rem 2rem;
    text-align: center;
}

.portfolio_item .txt_box h3 {
    font-size: 2.1rem;
    font-weight: 800;
    color: #222;
    margin-bottom: 0.8rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.portfolio_item .txt_box p {
    font-size: 1.5rem;
    color: #888;
}

@media (max-width: 1200px) {
    .portfolio_grid_lt ul { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 991px) {
    .portfolio_grid_lt ul { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .portfolio_grid_lt ul { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .portfolio_item .txt_box { padding: 1.5rem 1rem; }
    .portfolio_item .txt_box h3 { font-size: 1.6rem; }
    .portfolio_item .txt_box p { font-size: 1.3rem; }
}