body {
    background: #0f1014;
    color: #eee;
    font-family: system-ui;
}
/* body padding will be set dynamically to the header height below; fallback: */
body {
    padding: 10px;
}
.section {
    padding: 80px 0;
}
.portfolio-filters {
    list-style: none;
    display: flex;
    gap: 10px;
    justify-content: center;
}
.portfolio-filters li {
    cursor: pointer;
    padding: 8px 18px;
    border-radius: 50px;
    border: 1px solid #555;
    color: #ddd;
}
.filter-active {
    background: var(var(--surface-color));
    border-color: var(var(--surface-color));
    color: #111;
}
.portfolio-card {
    background: #171820;
    border-radius: 18px;
    overflow: hidden;
}
.portfolio-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1/1; /* Square images */
    overflow: hidden;
}
.portfolio-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
}
.portfolio-overlay {
    position: absolute;
    inset: 0;
    opacity: 0;
    background: rgba(0, 0, 0, .7);
    transition: .3s;
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.portfolio-image-container:hover img {
    transform: scale(1.06);
}
.portfolio-image-container:hover .portfolio-overlay {
    opacity: 1;
}
.portfolio-actions a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: center;
}