/* =========================
   PORTFOLIO SECTION
========================= */

.portfolio {
    padding: 100px 0;
    background: var(--color-alt);
}

/* =========================
   TITLE
========================= */

.portfolio .section-title {
    text-align: center;

    font-size: 2.6rem;
    font-weight: 800;

    color: var(--color-primary);

    margin-bottom: 60px;
}

/* =========================
   GRID
========================= */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    gap: 30px;
}

/* =========================
   CARD
========================= */

.portfolio-card {
    position: relative;

    display: block;

    text-decoration: none;
    color: inherit;

    background: var(--color-surface);

    border-radius: 16px;
    overflow: hidden;

    box-shadow: var(--shadow-sm);

    opacity: 0;
    transform: translateY(20px);

    transition:
        opacity 0.7s ease,
        transform 0.7s ease,
        box-shadow 0.35s ease;
}

/* =========================
   CARD REVEAL
========================= */

.portfolio.reveal.active .portfolio-card {
    opacity: 1;
    transform: translateY(0);
}

/* STAGGER */

.portfolio.reveal.active .portfolio-card:nth-child(1) {
    transition-delay: 0.05s;
}

.portfolio.reveal.active .portfolio-card:nth-child(2) {
    transition-delay: 0.10s;
}

.portfolio.reveal.active .portfolio-card:nth-child(3) {
    transition-delay: 0.15s;
}

.portfolio.reveal.active .portfolio-card:nth-child(4) {
    transition-delay: 0.20s;
}

.portfolio.reveal.active .portfolio-card:nth-child(5) {
    transition-delay: 0.25s;
}

.portfolio.reveal.active .portfolio-card:nth-child(6) {
    transition-delay: 0.30s;
}

.portfolio.reveal.active .portfolio-card:nth-child(7) {
    transition-delay: 0.35s;
}

/* =========================
   CARD ACCENT (inlocuieste fotografia)
========================= */

/*
    3 nuante care alterneaza intre carduri, pt. varietate vizuala fara
    sa iasa din paleta de brand. Constante intre teme (nu folosesc
    --color-heading, care devine aproape alb in dark mode).
*/
.portfolio {
    --portfolio-tone-a: var(--color-primary-solid);
    --portfolio-tone-b: var(--color-primary-light);
    --portfolio-tone-c: #4c1d95;
}

.portfolio-card {
    border-top: 4px solid var(--portfolio-tone-a);
}

.portfolio-card:nth-child(2),
.portfolio-card:nth-child(5) {
    border-top-color: var(--portfolio-tone-b);
}

.portfolio-card:nth-child(3),
.portfolio-card:nth-child(6) {
    border-top-color: var(--portfolio-tone-c);
}

/* =========================
   CARD HOVER
========================= */

.portfolio-card:hover {
    transform: translateY(-6px) scale(1.01);

    box-shadow: var(--shadow-lg);
}

/* =========================
   CAPTION
========================= */

.portfolio-overlay {
    min-height: 150px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;

    padding: 28px 24px;

    background: var(--color-surface);

    text-align: center;
}

.portfolio-overlay h3 {
    margin: 0;

    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.4;

    color: var(--color-heading);
}

.portfolio-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.portfolio-link {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-decoration: none;

    padding: 8px 18px;
    border-radius: 999px;

    transition:
        background-color 0.25s ease,
        color 0.25s ease,
        transform 0.25s ease;
}

/* Actiunea principala — articolul propriu, pe acest site */
.portfolio-link:not(.portfolio-link-external) {
    background: var(--color-primary);
    color: #ffffff;
}

.portfolio-link:not(.portfolio-link-external):hover,
.portfolio-link:not(.portfolio-link-external):focus-visible {
    background: var(--color-heading);
}

/* Actiunea secundara — link extern catre Forbes */
.portfolio-link-external {
    color: var(--color-primary);
}

.portfolio-link-external:hover,
.portfolio-link-external:focus-visible {
    text-decoration: underline;
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 992px) {

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {

    .portfolio {
        padding: 80px 0;
    }

    .portfolio .section-title {
        margin-bottom: 50px;
    }
}

@media (max-width: 600px) {

    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================
   ACCESSIBILITY
========================= */

@media (prefers-reduced-motion: reduce) {

    .portfolio-card,
    .portfolio-source {
        transition: none !important;
    }
}