/* ==============================
   PORTFOLIO SECTION
   (header, divider and spacing: sections.css)
============================== */

/* Project grid */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
}

/* Project card */

.portfolio-card {
    position: relative;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    border: 1px solid rgba(var(--primary-rgb), 0.18);
    background: rgba(var(--surface-rgb), 0.65);
    transition:
        transform 0.35s ease,
        border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.portfolio-card:hover,
.portfolio-card:focus-within {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 12px 30px var(--cyan-glow);
}

/* Signal line: travels along the top edge on hover/focus */
.portfolio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), rgba(var(--primary-rgb), 0));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.55s var(--ease-out);
    pointer-events: none;
}

.portfolio-card:hover::before,
.portfolio-card:focus-within::before {
    transform: scaleX(1);
}

/* Image */

.portfolio-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background:
        radial-gradient(circle at center, rgba(var(--primary-rgb), 0.1), transparent 70%),
        var(--bg-deep);
    border-bottom: 1px solid rgba(var(--primary-rgb), 0.15);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-image img {
    transform: scale(1.04);
}

/* View project overlay */

.portfolio-view {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    padding: 0.65rem 0.9rem;
    color: var(--on-accent);
    background: var(--primary-fill);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08rem;
    opacity: 0;
    transform: translateY(8px);
    transition:
        opacity var(--transition-fast),
        transform var(--transition-fast);
}

.portfolio-card:hover .portfolio-view,
.portfolio-card:focus-within .portfolio-view {
    opacity: 1;
    transform: translateY(0);
}

/* Project information */

.portfolio-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 1.5rem;
}

.portfolio-meta {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-subtle);
    font-family: var(--font-tech);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

.portfolio-meta span:last-child {
    color: var(--secondary);
}

.portfolio-info h3 {
    margin: 0;
    color: var(--text-strong);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.portfolio-card:hover .portfolio-info h3 {
    color: var(--primary);
}

.portfolio-info > p {
    margin: 0.8rem 0 1.2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* Technology tags */

.portfolio-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.portfolio-tags li {
    padding: 0.4rem 0.7rem;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: 3px;
    color: var(--text-muted);
    background: rgba(var(--primary-rgb), 0.035);
    font-size: 0.7rem;
    transition:
        border-color 0.25s ease,
        color 0.25s ease;
}

.portfolio-card:hover .portfolio-tags li {
    border-color: rgba(var(--primary-rgb), 0.4);
    color: var(--text-strong);
}

/* Live demo link */

.portfolio-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem 1.75rem;
    margin-top: auto;
}

.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 44px;
    padding: 0.5rem 0;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.portfolio-link span[aria-hidden] {
    transition: transform var(--transition-fast);
}

/* Underline "draws" from the left on hover/focus */
.portfolio-link {
    position: relative;
}

.portfolio-link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 10px;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s var(--ease-out);
}

.portfolio-link:hover::after,
.portfolio-link:focus-visible::after {
    transform: scaleX(1);
}

.portfolio-link:hover {
    color: var(--secondary);
}

.portfolio-link:hover span[aria-hidden] {
    transform: translate(3px, -3px);
}

/* Secondary link: source code on GitHub */
.portfolio-link-source {
    color: var(--text-muted);
}

.portfolio-link-source svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.portfolio-link-source:hover {
    color: var(--primary);
}

/* GitHub footer */

.portfolio-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    border-top: 1px solid rgba(var(--primary-rgb), 0.18);
}

.portfolio-footer > span {
    color: var(--text-subtle);
    font-family: var(--font-tech);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
}

.portfolio-footer a {
    padding: 0.5rem 0;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 800;
    text-decoration: none;
    letter-spacing: 0.08rem;
    transition: color 0.3s ease;
}

.portfolio-footer a:hover {
    color: var(--secondary);
}

/* Tablet */

@media (max-width: 850px) {
    .portfolio-grid {
        gap: 1.2rem;
    }

}

/* Mobile */

@media (max-width: 600px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-info {
        padding: 1.2rem;
    }

    .portfolio-info h3 {
        font-size: 1.3rem;
    }

    .portfolio-footer {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* Touch devices: no hover, so always show the overlay label */
@media (hover: none) {
    .portfolio-view {
        opacity: 1;
        transform: none;
    }

    .portfolio-card:hover {
        transform: none;
    }
}