/* =========================================================
   Section 4 — Selected Work / Portfolio
   Scoped under .nx-portfolio. Reuses --nx-* tokens.
   Does not modify Sections 1–3.
   ========================================================= */

.nx-portfolio {
    position: relative;
    background: var(--nx-bg);
    color: var(--nx-text);
    padding: clamp(4.5rem, 10vh, 7.5rem) 0 clamp(4.5rem, 9vh, 7rem);
    overflow: hidden;
    border-top: 1px solid var(--nx-border);
}

.nx-portfolio__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(ellipse 55% 40% at 50% 28%, rgba(79, 124, 255, 0.08) 0%, transparent 62%),
        radial-gradient(ellipse 35% 30% at 90% 75%, rgba(79, 124, 255, 0.04) 0%, transparent 55%);
}

.nx-portfolio__inner {
    position: relative;
    z-index: 1;
}

/* Header — editorial split */
.nx-portfolio__header {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    grid-template-areas:
        "eyebrow eyebrow"
        "heading lede";
    column-gap: clamp(2rem, 5vw, 4.5rem);
    row-gap: 1.15rem;
    align-items: end;
    margin-bottom: clamp(3rem, 6vh, 4.5rem);
}

.nx-portfolio__eyebrow {
    grid-area: eyebrow;
}

.nx-portfolio__heading {
    grid-area: heading;
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(2.125rem, 4vw, 3.5rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.035em;
    color: var(--nx-text);
    max-width: 10em;
}

.nx-portfolio__lede {
    grid-area: lede;
    margin: 0;
    max-width: 34rem;
    font-size: clamp(1rem, 1.15vw, 1.125rem);
    line-height: 1.65;
    color: var(--nx-text-muted);
    padding-bottom: 0.25rem;
}

/* Shared frame / shot */
.nx-portfolio__frame {
    background: var(--nx-surface);
    border: 1px solid var(--nx-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.35);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.nx-portfolio__chrome {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.7rem 0.9rem;
    background: rgba(18, 21, 26, 0.95);
    border-bottom: 1px solid var(--nx-border);
}

.nx-portfolio__chrome span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
}

.nx-portfolio__chrome em {
    margin-left: 0.55rem;
    font-style: normal;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--nx-text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nx-portfolio__shot {
    background: #0a0b0e;
    overflow: hidden;
}

.nx-portfolio__shot img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.55s ease;
}

.nx-portfolio__shot--featured {
    aspect-ratio: 16 / 10;
}

.nx-portfolio__shot--card {
    aspect-ratio: 16 / 11;
}

.nx-portfolio__shot--wide {
    aspect-ratio: 21 / 10;
}

.nx-portfolio__num {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--nx-text-muted);
    margin-bottom: 0.55rem;
}

.nx-portfolio__name {
    margin: 0 0 0.45rem;
    font-family: var(--font-display);
    font-size: clamp(1.45rem, 2.4vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--nx-text);
    transition: transform 0.3s ease;
}

.nx-portfolio__tags {
    margin: 0 0 0.85rem;
    font-size: 0.8125rem;
    letter-spacing: 0.02em;
    color: var(--nx-text-muted);
}

.nx-portfolio__desc {
    margin: 0 0 0.9rem;
    font-size: 0.98rem;
    line-height: 1.6;
    color: var(--nx-text-muted);
    max-width: 36rem;
}

.nx-portfolio__services {
    margin: 0 0 1.15rem;
    font-size: 0.8125rem;
    color: rgba(146, 153, 165, 0.85);
}

.nx-portfolio__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--nx-text);
    letter-spacing: -0.01em;
}

.nx-portfolio__cta span {
    color: var(--nx-accent);
    transition: transform 0.25s ease;
    display: inline-block;
}

/* Featured */
.nx-portfolio__featured {
    margin-bottom: clamp(3rem, 6vh, 4.5rem);
}

.nx-portfolio__featured-link {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: clamp(1.75rem, 4vw, 3.25rem);
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.nx-portfolio__featured-link:focus-visible {
    outline: 2px solid var(--nx-accent);
    outline-offset: 6px;
    border-radius: 4px;
}

.nx-portfolio__featured-link:hover .nx-portfolio__frame,
.nx-portfolio__featured-link:focus-visible .nx-portfolio__frame {
    border-color: rgba(79, 124, 255, 0.28);
    box-shadow: 0 24px 56px rgba(0, 0, 0, 0.42);
}

.nx-portfolio__featured-link:hover .nx-portfolio__shot img,
.nx-portfolio__featured-link:focus-visible .nx-portfolio__shot img {
    transform: scale(1.025);
}

.nx-portfolio__featured-link:hover .nx-portfolio__name,
.nx-portfolio__featured-link:focus-visible .nx-portfolio__name {
    transform: translateX(4px);
}

.nx-portfolio__featured-link:hover .nx-portfolio__cta span,
.nx-portfolio__featured-link:focus-visible .nx-portfolio__cta span {
    transform: translate(3px, -2px);
}

.nx-portfolio__featured .nx-portfolio__name {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
}

/* Secondary grid */
.nx-portfolio__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.5rem, 3vw, 2.5rem);
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.nx-portfolio__card-link,
.nx-portfolio__wide-link {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.nx-portfolio__card-link:focus-visible,
.nx-portfolio__wide-link:focus-visible {
    outline: 2px solid var(--nx-accent);
    outline-offset: 6px;
    border-radius: 4px;
}

.nx-portfolio__card-copy {
    padding-top: 1.25rem;
}

.nx-portfolio__card-link:hover .nx-portfolio__frame,
.nx-portfolio__card-link:focus-visible .nx-portfolio__frame,
.nx-portfolio__wide-link:hover .nx-portfolio__frame,
.nx-portfolio__wide-link:focus-visible .nx-portfolio__frame {
    border-color: rgba(79, 124, 255, 0.24);
}

.nx-portfolio__card-link:hover .nx-portfolio__shot img,
.nx-portfolio__card-link:focus-visible .nx-portfolio__shot img,
.nx-portfolio__wide-link:hover .nx-portfolio__shot img,
.nx-portfolio__wide-link:focus-visible .nx-portfolio__shot img {
    transform: scale(1.02);
}

.nx-portfolio__card-link:hover .nx-portfolio__name,
.nx-portfolio__card-link:focus-visible .nx-portfolio__name,
.nx-portfolio__wide-link:hover .nx-portfolio__name,
.nx-portfolio__wide-link:focus-visible .nx-portfolio__name {
    transform: translateX(3px);
}

.nx-portfolio__card-link:hover .nx-portfolio__cta span,
.nx-portfolio__card-link:focus-visible .nx-portfolio__cta span,
.nx-portfolio__wide-link:hover .nx-portfolio__cta span,
.nx-portfolio__wide-link:focus-visible .nx-portfolio__cta span {
    transform: translate(3px, -2px);
}

/* Wide project */
.nx-portfolio__wide {
    margin-bottom: clamp(3rem, 6vh, 4.5rem);
}

.nx-portfolio__wide-copy {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 1rem 1.5rem;
    align-items: end;
    padding-top: 1.35rem;
}

.nx-portfolio__wide-copy .nx-portfolio__num {
    margin-bottom: 0;
    padding-bottom: 0.35rem;
}

.nx-portfolio__wide-copy .nx-portfolio__cta {
    padding-bottom: 0.2rem;
    white-space: nowrap;
}

.nx-portfolio__wide-text .nx-portfolio__desc {
    margin-bottom: 0;
}

/* Footer CTA */
.nx-portfolio__footer {
    padding-top: clamp(2rem, 4vh, 2.75rem);
    border-top: 1px solid var(--nx-border);
    max-width: 40rem;
}

.nx-portfolio__footer-kicker {
    margin: 0 0 0.4rem;
    font-size: 0.92rem;
    color: var(--nx-text-muted);
}

.nx-portfolio__footer-line {
    margin: 0 0 1.5rem;
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.2vw, 1.75rem);
    font-weight: 650;
    letter-spacing: -0.025em;
    color: var(--nx-text);
    line-height: 1.25;
}

.nx-portfolio__footer-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.85rem;
}

.nx-portfolio__btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0.85rem 1.35rem;
    border-radius: 999px;
    background: var(--nx-accent);
    color: #fff;
    font-size: 0.94rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: -0.01em;
    transition:
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.nx-portfolio__btn-primary span {
    display: inline-block;
    transition: transform 0.2s ease;
}

.nx-portfolio__btn-primary:hover {
    background: var(--nx-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 28px rgba(79, 124, 255, 0.25);
}

.nx-portfolio__btn-primary:hover span {
    transform: translateX(3px);
}

.nx-portfolio__btn-primary:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
}

.nx-portfolio__btn-secondary {
    display: inline-flex;
    align-items: center;
    min-height: 48px;
    padding: 0.85rem 1.25rem;
    border-radius: 999px;
    border: 1px solid var(--nx-border);
    color: var(--nx-text);
    font-size: 0.94rem;
    font-weight: 600;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.nx-portfolio__btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.04);
}

.nx-portfolio__btn-secondary:focus-visible {
    outline: 2px solid var(--nx-accent);
    outline-offset: 3px;
}

/* Reveals */
.nx-portfolio .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition:
        opacity 0.65s ease,
        transform 0.65s ease;
}

.nx-portfolio .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .nx-portfolio .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .nx-portfolio__shot img,
    .nx-portfolio__name,
    .nx-portfolio__cta span,
    .nx-portfolio__frame,
    .nx-portfolio__btn-primary,
    .nx-portfolio__btn-primary span {
        transition: none !important;
    }

    .nx-portfolio__featured-link:hover .nx-portfolio__shot img,
    .nx-portfolio__card-link:hover .nx-portfolio__shot img,
    .nx-portfolio__wide-link:hover .nx-portfolio__shot img {
        transform: none;
    }

    .nx-portfolio__featured-link:hover .nx-portfolio__name,
    .nx-portfolio__card-link:hover .nx-portfolio__name,
    .nx-portfolio__wide-link:hover .nx-portfolio__name {
        transform: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .nx-portfolio__featured-link {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .nx-portfolio__shot--wide {
        aspect-ratio: 16 / 9;
    }
}

@media (max-width: 900px) {
    .nx-portfolio__header {
        grid-template-columns: 1fr;
        grid-template-areas:
            "eyebrow"
            "heading"
            "lede";
        row-gap: 1rem;
        margin-bottom: 2.75rem;
    }

    .nx-portfolio__heading {
        max-width: none;
    }

    .nx-portfolio__grid {
        grid-template-columns: 1fr;
    }

    .nx-portfolio__wide-copy {
        grid-template-columns: auto 1fr;
        grid-template-areas:
            "num text"
            "cta cta";
    }

    .nx-portfolio__wide-copy .nx-portfolio__num {
        grid-area: num;
    }

    .nx-portfolio__wide-text {
        grid-area: text;
    }

    .nx-portfolio__wide-copy .nx-portfolio__cta {
        grid-area: cta;
        justify-self: start;
        margin-top: 0.35rem;
    }
}

@media (max-width: 768px) {
    .nx-portfolio {
        padding: 3.75rem 0 3.5rem;
    }

    .nx-portfolio__chrome em {
        font-size: 0.62rem;
    }

    .nx-portfolio__shot--featured,
    .nx-portfolio__shot--card {
        aspect-ratio: 16 / 11;
    }

    .nx-portfolio__shot--wide {
        aspect-ratio: 16 / 10;
    }

    .nx-portfolio__featured,
    .nx-portfolio__wide {
        margin-bottom: 2.75rem;
    }

    .nx-portfolio__footer-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .nx-portfolio__btn-primary,
    .nx-portfolio__btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .nx-portfolio__featured-link:hover .nx-portfolio__name,
    .nx-portfolio__card-link:hover .nx-portfolio__name,
    .nx-portfolio__wide-link:hover .nx-portfolio__name {
        transform: none;
    }
}

@media (max-width: 430px) {
    .nx-portfolio__heading {
        font-size: clamp(1.9rem, 8.5vw, 2.25rem);
    }

    .nx-portfolio__featured .nx-portfolio__name {
        font-size: 1.55rem;
    }
}