.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 14px;
    background: #151b54;
    box-shadow: 0 10px 30px rgba(0,0,0,.15);
}

.portfolio-placeholder {
    height: 260px;
    background-size: cover;
    background-position: center;
    position: relative;
    transition: transform .6s ease;
}

.portfolio-placeholder video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(21,27,84,.85),
        rgba(0,0,0,.1)
    );
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: opacity .4s ease;
}

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

.portfolio-overlay span {
    color: #faaa03;
    font-weight: bold;
    letter-spacing: .5px;
}

/* Animation reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: .7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}