/* ---- Portfolio Index: Hero ---- */
.portfolio-hero {
    position: relative;
    background: var(--gradient-dark);
    color: var(--color-white);
    padding-block: var(--space-3xl);
    text-align: center;
    overflow: hidden;
}

.portfolio-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 680px;
    margin-inline: auto;
}

.portfolio-hero-inner h1 {
    font-size: var(--text-h1);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
}

.portfolio-hero-inner p {
    font-size: var(--text-h3);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
}

/* ---- Portfolio Index: Filter Bar ---- */
.portfolio-index {
    background-color: var(--color-neutral-bg);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-xl);
}

.portfolio-filter-btn {
    padding: 9px 20px;
    border-radius: 999px;
    font-size: var(--text-small);
    font-weight: 600;
    color: var(--color-text-muted);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    transition: color var(--duration-fast) var(--ease-out),
                background-color var(--duration-fast) var(--ease-out),
                border-color var(--duration-fast) var(--ease-out);
}

.portfolio-filter-btn:hover {
    color: var(--color-primary);
    border-color: var(--tint-blue-border);
}

.portfolio-filter-btn.is-active {
    color: var(--color-white);
    background: var(--gradient-primary);
    border-color: transparent;
}

/* ---- Portfolio Index: Card Grid ---- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.portfolio-card {
    display: block;
    border-radius: var(--radius-card);
    overflow: hidden;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    transition: transform var(--duration-base) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out),
                opacity var(--duration-base) var(--ease-out);
}

.portfolio-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lift);
}

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

.portfolio-cover {
    position: relative;
    height: 200px;
    background: var(--gradient-dark);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-cover .dot-grid {
    color: var(--color-white);
}

.portfolio-cover img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-cover-icon {
    position: relative;
    display: inline-flex;
    opacity: 0.3;
}

.portfolio-cover-icon .icon {
    width: 64px;
    height: 64px;
    color: var(--color-white);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: rgba(15, 23, 42, 0.55);
    color: var(--color-white);
    font-weight: 600;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-info {
    padding: var(--space-md);
}

.portfolio-category {
    display: inline-block;
    font-size: var(--text-caption);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.portfolio-info h2 {
    font-size: var(--text-h3);
    margin-bottom: 4px;
}

.portfolio-info p {
    color: var(--color-text-muted);
    font-size: var(--text-small);
}

/* ---- Portfolio Detail: Hero ---- */
.portfolio-detail-hero {
    position: relative;
    background: var(--gradient-dark);
    color: var(--color-white);
    padding-block: var(--space-3xl);
    text-align: center;
    overflow: hidden;
}

.portfolio-blob-1 {
    width: 360px;
    height: 360px;
    top: -160px;
    left: -80px;
    background: var(--color-primary);
}

.portfolio-blob-2 {
    width: 260px;
    height: 260px;
    bottom: -140px;
    right: -60px;
    background: var(--color-accent-cyan);
    animation-delay: -9s;
}

.portfolio-detail-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 680px;
    margin-inline: auto;
}

.portfolio-detail-hero-inner h1 {
    font-size: var(--text-h1);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
}

.portfolio-detail-hero-inner p {
    font-size: var(--text-h3);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
}

/* ---- Portfolio Detail: Overview ---- */
.portfolio-overview {
    position: relative;
    background-color: var(--color-white);
    overflow: hidden;
}

.portfolio-overview::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.05) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: radial-gradient(ellipse at center, transparent 50%, #000 95%);
    mask-image: radial-gradient(ellipse at center, transparent 50%, #000 95%);
}

.portfolio-overview .container {
    position: relative;
    z-index: 1;
}

.portfolio-overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.portfolio-overview-grid p {
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* ---- Portfolio Detail: Key Features (bordered checklist) ---- */
.portfolio-features {
    background-color: var(--color-neutral-bg);
}

.portfolio-features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md) var(--space-2xl);
    margin-top: var(--space-xl);
}

.portfolio-feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding-block: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.portfolio-feature-check {
    display: inline-flex;
    flex-shrink: 0;
    color: var(--color-primary);
}

.portfolio-feature-check .icon {
    width: 22px;
    height: 22px;
}

.portfolio-feature-item p {
    font-weight: 500;
    color: var(--color-dark-2);
}

/* ---- Portfolio Detail: Tech Used & Live Preview ---- */
.portfolio-tech {
    position: relative;
    background-color: var(--color-white);
    overflow: hidden;
}

.portfolio-tech::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.05) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: radial-gradient(ellipse at center, transparent 50%, #000 95%);
    mask-image: radial-gradient(ellipse at center, transparent 50%, #000 95%);
}

.portfolio-tech .container {
    position: relative;
    z-index: 1;
}

.portfolio-tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

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

.portfolio-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.portfolio-tech-tags li {
    font-size: var(--text-small);
    font-weight: 600;
    color: var(--color-primary);
    background-color: var(--tint-blue);
    border: 1px solid var(--tint-blue-border);
    padding: 6px 14px;
    border-radius: 999px;
}

.portfolio-tech-thumbnail {
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
}

.portfolio-tech-thumbnail img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ---- Portfolio Detail: Screenshots ---- */
.portfolio-screenshots {
    background-color: var(--color-neutral-bg);
}

.portfolio-screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.portfolio-screenshot {
    position: relative;
    height: 180px;
    border-radius: var(--radius-card);
    background-color: var(--color-white);
    border: 1px dashed var(--color-border);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-screenshot.has-image {
    border-style: solid;
}

button.portfolio-screenshot {
    padding: 0;
    background: none;
    font: inherit;
    color: inherit;
    text-align: inherit;
    cursor: zoom-in;
}

.portfolio-screenshot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-screenshot .dot-grid {
    color: var(--color-primary);
}

.portfolio-screenshot span {
    position: relative;
    font-size: var(--text-small);
    font-weight: 600;
    color: var(--color-text-muted);
}

/* ---- Portfolio Detail: CTA ---- */
.portfolio-cta-banner {
    background: var(--gradient-dark);
    color: var(--color-white);
    overflow: hidden;
}

.portfolio-cta-banner h2 {
    font-size: var(--text-h2);
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
}

.portfolio-cta-banner p {
    margin-bottom: var(--space-lg);
    color: rgba(255, 255, 255, 0.65);
    position: relative;
    z-index: 1;
}

.portfolio-cta-banner .btn {
    position: relative;
    z-index: 1;
}

/* ---- Responsive ---- */
@media (max-width: 991px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-overview-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

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

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

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

@media (max-width: 575px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

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

/* ---- Portfolio Detail: Screenshot Lightbox ---- */
body.has-lightbox-open {
    overflow: hidden;
}

.portfolio-lightbox {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.92);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-base) var(--ease-out), visibility var(--duration-base) var(--ease-out);
}

.portfolio-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.portfolio-lightbox-stage {
    position: relative;
    max-width: min(90vw, 1100px);
    max-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-lightbox-stage.is-zoomed {
    max-width: 96vw;
    overflow: auto;
}

.portfolio-lightbox-stage img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-card);
    cursor: zoom-in;
    user-select: none;
}

.portfolio-lightbox-stage.is-zoomed img {
    max-width: none;
    max-height: none;
    width: 160%;
    border-radius: 0;
    cursor: zoom-out;
}

.portfolio-lightbox-close,
.portfolio-lightbox-prev,
.portfolio-lightbox-next {
    position: absolute;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-white);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.portfolio-lightbox-close:hover,
.portfolio-lightbox-prev:hover,
.portfolio-lightbox-next:hover {
    background: rgba(255, 255, 255, 0.18);
}

.portfolio-lightbox-close {
    top: var(--space-md);
    right: var(--space-md);
}

.portfolio-lightbox-prev {
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
}

.portfolio-lightbox-next {
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
}

.portfolio-lightbox-prev:hover,
.portfolio-lightbox-next:hover {
    transform: translateY(-50%) scale(1.06);
}

.portfolio-lightbox-counter {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-small);
    font-weight: 600;
    letter-spacing: 0.04em;
}

@media (max-width: 575px) {
    .portfolio-lightbox-prev,
    .portfolio-lightbox-next {
        width: 38px;
        height: 38px;
    }

    .portfolio-lightbox-prev {
        left: var(--space-xs);
    }

    .portfolio-lightbox-next {
        right: var(--space-xs);
    }
}