/* =====================================================
   portfolio.css — RapiX Solutions Portfolio Bundle
   var() colours only (RULE 1). Loaded on:
     - single-rs_portfolio.php   (case study)
     - archive-rs_portfolio.php  (/portfolio/)
     - taxonomy-portfolio_service.php (/portfolio/service/[slug]/)
   ===================================================== */

/* =====================================================
   SINGLE CASE STUDY
   ===================================================== */

/* ---- Hero ---- */

.portfolio-hero {
    padding-bottom: 0; /* image bleeds to the next section */
}

.portfolio-hero__inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    max-width: var(--container-max);
}

.portfolio-hero__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.portfolio-hero__meta {
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.portfolio-hero__rule {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: 0;
    width: 100%;
}

.portfolio-hero__title {
    margin: 0;
    max-width: 18ch;
}

.portfolio-hero__result {
    font-family: var(--font-accent);
    font-style: italic;
    font-weight: 500;
    font-size: clamp( 1.5rem, 3vw, 2.25rem );
    line-height: var(--leading-snug);
    color: var(--color-primary);
    letter-spacing: -0.01em;
    max-width: 32ch;
    margin: 0;
}

.portfolio-hero__intro {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    line-height: var(--leading-body);
    color: var(--color-muted);
    max-width: var(--measure-text);
}

.portfolio-hero__intro p { margin: 0 0 var(--space-3); }
.portfolio-hero__intro p:last-child { margin-bottom: 0; }

.portfolio-hero__media {
    margin-top: var(--space-12);
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

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

.portfolio-hero__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(
        135deg,
        var(--color-primary) 0%,
        var(--color-primary-light) 100%
    );
}

.portfolio-hero__placeholder span {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: clamp( 6rem, 18vw, 18rem );
    color: var(--color-white);
    letter-spacing: var(--tracking-tight);
    opacity: 0.95;
}

/* ---- Meta bar ---- */

.portfolio-meta {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-border);
}

.portfolio-meta__list {
    display: grid;
    grid-template-columns: repeat( 4, 1fr );
    gap: var(--space-8);
    margin: 0;
    padding: 0;
}

.portfolio-meta__item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.portfolio-meta__label {
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 0;
}

.portfolio-meta__value {
    font-family: var(--font-heading);
    font-weight: var(--fw-semibold);
    font-size: var(--text-body-lg);
    line-height: var(--leading-snug);
    color: var(--color-text);
    margin: 0;
}

/* ---- Brief + Approach (2-col editorial blocks) ---- */

.portfolio-brief__inner,
.portfolio-approach__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.portfolio-brief__left,
.portfolio-approach__right {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.portfolio-brief__heading,
.portfolio-approach__heading {
    margin: 0;
    max-width: 18ch;
}

.portfolio-brief__body,
.portfolio-approach__body {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    line-height: var(--leading-body);
    color: var(--color-text);
    max-width: var(--measure-text);
}

.portfolio-brief__body p,
.portfolio-approach__body p {
    margin: 0 0 var(--space-4);
}

.portfolio-brief__body p:last-child,
.portfolio-approach__body p:last-child {
    margin-bottom: 0;
}

/* ---- Results ---- */

.portfolio-results__head {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    max-width: 880px;
    margin: 0 auto var(--space-12);
}

.portfolio-results__heading { margin: 0; }

.portfolio-results__sub {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    line-height: var(--leading-body);
    color: var(--color-muted);
    max-width: var(--measure-text);
}

.portfolio-results__grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat( 4, 1fr );
    gap: var(--space-10);
}

.result-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.result-card__value {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: clamp( 2.5rem, 5.5vw, 4rem );
    line-height: 0.95;
    letter-spacing: var(--tracking-tight);
    color: var(--color-primary);
}

.result-card__label {
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.result-card__context {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    line-height: var(--leading-body);
    color: var(--color-muted);
    margin: 0;
}

/* ---- Gallery ---- */

.portfolio-gallery__grid {
    display: grid;
    grid-template-columns: repeat( 6, 1fr );
    gap: var(--space-6);
}

.gallery-item {
    margin: 0;
}

.gallery-item--full  { grid-column: span 6; }
.gallery-item--half  { grid-column: span 3; }
.gallery-item--third { grid-column: span 2; }

.gallery-item__img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.gallery-item--full .gallery-item__img {
    aspect-ratio: 16 / 9;
}

.gallery-item__caption {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-muted);
    margin-top: var(--space-2);
    line-height: var(--leading-snug);
}

/* ---- Pull quote ---- */

.portfolio-quote__inner {
    max-width: 880px;
    margin: 0 auto;
}

/* ---- Related projects ---- */

.portfolio-related__head {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    max-width: 880px;
}

.portfolio-related__heading { margin: 0; }

.portfolio-related__grid {
    display: grid;
    grid-template-columns: repeat( 3, 1fr );
    gap: var(--space-8);
}

.related-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    text-decoration: none;
    color: inherit;
    transition: transform var(--ease-slow);
}

.related-card:hover { transform: translateY( -4px ); }

.related-card__media {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: var(--radius-md);
    background-color: var(--color-bg);
}

.related-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier( 0.2, 0.7, 0.2, 1 );
}

.related-card:hover .related-card__img { transform: scale( 1.04 ); }

.related-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(
        135deg,
        var(--color-primary) 0%,
        var(--color-primary-light) 100%
    );
}

.related-card__placeholder span {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: var(--text-h1);
    color: var(--color-white);
    letter-spacing: var(--tracking-tight);
    opacity: 0.95;
}

.related-card__body {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.related-card__tag {
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.related-card__name {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: var(--text-h3);
    line-height: var(--leading-snug);
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin: 0;
    transition: color var(--ease-base);
}

.related-card:hover .related-card__name { color: var(--color-primary); }

.related-card__result {
    font-family: var(--font-body);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--color-muted);
    margin: 0;
}

/* =====================================================
   PORTFOLIO HUB  (/portfolio/ — editable page template)
   + legacy archive / taxonomy templates
   ===================================================== */

/* ---- Archive hero (legacy archive template) ---- */

.portfolio-archive-hero__inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.portfolio-archive-hero__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.portfolio-archive-hero__back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    text-decoration: none;
    transition: color var(--ease-base);
}

.portfolio-archive-hero__back:hover { color: var(--color-primary); }

.portfolio-archive-hero__rule {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: 0;
    width: 100%;
}

.portfolio-archive-hero__title {
    margin: 0;
    max-width: 22ch;
}

.portfolio-archive-hero__sub {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    line-height: var(--leading-body);
    color: var(--color-muted);
    max-width: var(--measure-text);
    margin: 0;
}

/* ---- Filter section ----
   Lives ABOVE the grid section. White background, generous top padding,
   ZERO bottom padding so the chip row sits flush against the grid that
   follows. The chip row gets its own visual hairline below to read as a
   premium toolbar rather than a floating tag cloud.
*/

.portfolio-filter {
    padding-top: var(--space-16);
    padding-bottom: 0;
}

.portfolio-filter__top {
    margin-bottom: var(--space-6);
}

.portfolio-filter__list {
    list-style: none;
    margin: 0;
    padding: 0 0 var(--space-6) 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    border-bottom: 1px solid var(--color-border);
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-sm);
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background-color: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    transition:
        background-color var(--ease-base),
        border-color     var(--ease-base),
        color            var(--ease-base),
        transform        var(--ease-base);
}

.filter-chip:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    transform: translateY( -1px );
}

.filter-chip:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

.filter-chip.is-active {
    background-color: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-white);
}

.filter-chip.is-active:hover { transform: none; }

/* ---- Grid section ----
   White surface, sits flush against the filter section above (zero
   top padding) so the hairline divider underneath the chips reads as
   the boundary, not a section gap.
*/

.portfolio-grid-section {
    padding-top: var(--space-12);
}

.portfolio-grid-wrap {
    position: relative;
    transition: opacity 140ms ease;
}

.portfolio-grid-wrap.is-loading::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba( var(--color-text-rgb), 0.04 ) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: rs-grid-loading 1.2s ease-in-out infinite;
    pointer-events: none;
}

.portfolio-grid-wrap.is-swapping { opacity: 0.35; }

@keyframes rs-grid-loading {
    0%   { background-position: -100% 0; }
    100% { background-position:  100% 0; }
}

/* ---- Premium 2-col editorial grid ---- */

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat( 2, 1fr );
    column-gap: var(--space-12);
    row-gap: var(--space-24);
}

/* Editorial offset: every second card drops down a touch so the grid
   reads like a magazine spread instead of a flat 2x2. */
.portfolio-grid .work-card:nth-child( even ) {
    margin-top: var(--space-16);
}

.work-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    text-decoration: none;
    color: inherit;
    position: relative;
}

.work-card__media {
    position: relative;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    background-color: var(--color-bg);
}

.work-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.9s cubic-bezier( 0.2, 0.7, 0.2, 1 );
}

.work-card:hover .work-card__img { transform: scale( 1.05 ); }

.work-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(
        135deg,
        var(--color-primary) 0%,
        var(--color-primary-light) 100%
    );
}

.work-card__placeholder span {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: clamp( 4rem, 10vw, 8rem );
    color: var(--color-white);
    letter-spacing: var(--tracking-tight);
    opacity: 0.95;
}

/* Italic-serif editorial index in the image corner */
.work-card__index {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    font-family: var(--font-accent);
    font-style: italic;
    font-weight: 500;
    font-size: var(--text-body-lg);
    color: var(--color-white);
    letter-spacing: 0.02em;
    text-shadow: 0 2px 12px rgba( 0, 0, 0, 0.25 );
}

.work-card__body {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding-top: var(--space-2);
}

.work-card__tag {
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.work-card__name {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: var(--text-h2);
    line-height: var(--leading-heading);
    letter-spacing: var(--tracking-snug);
    color: var(--color-text);
    margin: 0;
    max-width: 18ch;
    transition: color var(--ease-base);
}

.work-card:hover .work-card__name { color: var(--color-primary); }

/* Project description — clear body copy, not a stylised pull-quote.
   Italic Cormorant felt decorative for what is actually a one-line
   factual summary of the project; switched to body font for legibility. */
.work-card__result {
    font-family: var(--font-body);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--color-muted);
    margin: 0;
    max-width: 42ch;
}

.work-card__arrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-xs);
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: color var(--ease-base), border-color var(--ease-base);
}

.work-card__arrow svg {
    transition: transform var(--ease-slow);
}

.work-card:hover .work-card__arrow {
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.work-card:hover .work-card__arrow svg { transform: rotate( -45deg ); }

/* ---- Pagination (kept for legacy archive template) ---- */

.portfolio-grid__pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-16);
}

.portfolio-grid__pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    font-size: var(--text-sm);
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: background-color var(--ease-base), color var(--ease-base), border-color var(--ease-base);
}

.portfolio-grid__pagination .page-numbers:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.portfolio-grid__pagination .page-numbers.current {
    background-color: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-white);
}

/* ---- Empty state ---- */

.portfolio-grid__empty {
    text-align: center;
    padding: var(--space-16) 0;
    max-width: 56ch;
    margin: 0 auto;
}

.portfolio-grid__empty-heading {
    font-family: var(--font-heading);
    font-weight: var(--fw-extrabold);
    font-size: var(--text-h2);
    line-height: var(--leading-heading);
    letter-spacing: var(--tracking-snug);
    color: var(--color-text);
    margin: 0 0 var(--space-4);
}

.portfolio-grid__empty-sub {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    line-height: var(--leading-body);
    color: var(--color-muted);
}

.portfolio-grid__empty a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* =====================================================
   Responsive
   ===================================================== */

@media ( max-width: 1024px ) {
    .portfolio-meta__list,
    .portfolio-results__grid {
        grid-template-columns: repeat( 2, 1fr );
    }
    .portfolio-brief__inner,
    .portfolio-approach__inner {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    .portfolio-brief__heading,
    .portfolio-approach__heading { max-width: 100%; }

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

    /* Hub grid: tighten the editorial offset on tablet */
    .portfolio-grid { column-gap: var(--space-8); row-gap: var(--space-16); }
    .portfolio-grid .work-card:nth-child( even ) { margin-top: var(--space-10); }
}

@media ( max-width: 768px ) {
    .portfolio-hero__media { margin-top: var(--space-8); }
    .portfolio-meta { padding-top: var(--space-8); padding-bottom: var(--space-8); }
    .portfolio-meta__list { gap: var(--space-6); }
    .portfolio-gallery__grid { grid-template-columns: 1fr; gap: var(--space-4); }
    .gallery-item--full,
    .gallery-item--half,
    .gallery-item--third { grid-column: span 1; }
    .portfolio-related__grid { grid-template-columns: 1fr; }

    /* Hub grid: collapse to single column, drop the editorial offset */
    .portfolio-grid {
        grid-template-columns: 1fr;
        column-gap: 0;
        row-gap: var(--space-12);
    }
    .portfolio-grid .work-card:nth-child( even ) { margin-top: 0; }

    .portfolio-filter { padding-top: var(--space-12); }
    .portfolio-filter__top { margin-bottom: var(--space-4); }
}

@media ( max-width: 640px ) {
    .portfolio-meta__list,
    .portfolio-results__grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    .filter-chip { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }
    .work-card__name { font-size: var(--text-h3); }
    .portfolio-filter__list { gap: var(--space-1); }
}