/* =================================================================
   PORTFOLIO SORTABLE PAGE
   (card visuals = .portfolio-item in style.css)
================================================================= */
.portfolio-sec {
    padding: 90px 0;
}

/* ---------- Filter navigation ---------------------------------- */
.portfolio-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
}

.portfolio-filter__btn {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    background: var(--white-color);
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition-base);
}

.portfolio-filter__btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.portfolio-filter__btn.is-active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white-color);
}

/* ---------- Grid ---------------------------------------------- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* Filter transition: items scale/fade, then collapse out of flow */
.portfolio-grid__item {
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.portfolio-grid__item.is-hidden {
    display: none;
}

.portfolio-grid__item.is-animating {
    opacity: 0;
    transform: scale(0.85);
}