/* ═══ Case study detail pages ═══ */

.case-study-page .case-study-overview,
.case-study-page .case-study-gallery,
.case-study-page .case-study-related {
    padding: 64px 0;
}

@media (max-width: 768px) {
    .case-study-page .case-study-overview,
    .case-study-page .case-study-gallery,
    .case-study-page .case-study-related {
        padding: 40px 0;
    }
}

/* Overview */
.case-study-overview {
    background: var(--white);
}

.case-study-overview__layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
}

.case-study-overview__copy p {
    margin: 0 0 1.25rem;
}

.case-study-overview__copy p:last-child {
    margin-bottom: 0;
}

.case-study-meta {
    margin: 0 0 1.75rem;
    display: grid;
    gap: 1.25rem;
}

.case-study-meta div {
    display: grid;
    gap: .35rem;
}

.case-study-meta dt {
    font-size: .6875rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.case-study-meta dd {
    margin: 0;
    font-family: var(--font-head);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--heading);
}

.case-study-overview__aside {
    background: var(--warm);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    border: 1px solid var(--warm-mid);
}

.case-study-outcomes__label {
    display: block;
    margin-bottom: .875rem;
    font-size: .6875rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.case-study-outcomes ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: .625rem;
}

.case-study-outcomes li {
    font-size: .9375rem;
    font-weight: 600;
    color: var(--heading);
    padding-left: 1.375rem;
    position: relative;
}

.case-study-outcomes li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--brand-red);
    font-weight: 800;
}

/* Photo gallery */
.case-study-gallery {
    background: var(--warm);
}

.case-study-gallery__head {
    margin-bottom: 1.75rem;
}

.case-study-gallery__head .section-title {
    margin-bottom: 0;
}

.case-study-gallery__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.case-study-gallery__item {
    position: relative;
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 14px 44px rgba(7, 31, 58, .1);
    aspect-ratio: 4 / 3;
    cursor: zoom-in;
    background: var(--navy);
    text-align: left;
    font: inherit;
    transition: box-shadow .3s ease, transform .3s ease;
}

.case-study-gallery__item:hover {
    box-shadow: 0 20px 56px rgba(7, 31, 58, .16);
    transform: translateY(-2px);
}

.case-study-gallery__zoom {
    position: absolute;
    right: .875rem;
    bottom: .875rem;
    z-index: 1;
    padding: .375rem .75rem;
    border-radius: 999px;
    background: rgba(7, 31, 58, .72);
    color: var(--white);
    font-size: .6875rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity .3s ease, transform .3s ease;
    pointer-events: none;
}

.case-study-gallery__item:hover .case-study-gallery__zoom {
    opacity: 1;
    transform: translateY(0);
}

.case-study-gallery__item--feature {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
    min-height: 100%;
}

.case-study-gallery__item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}

.case-study-gallery__item:hover img {
    transform: scale(1.03);
}

/* Related projects */
.case-study-related {
    background: var(--white);
}

.case-study-related__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.case-study-related__card {
    position: relative;
    display: block;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    box-shadow: 0 16px 48px rgba(7, 31, 58, .1);
    text-decoration: none;
    transition: transform .3s ease, box-shadow .3s ease;
}

.case-study-related__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 24px 64px rgba(7, 31, 58, .14);
}

.case-study-related__card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}

.case-study-related__card:hover img {
    transform: scale(1.05);
}

.case-study-related__shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(7, 31, 58, .78) 0%,
        rgba(7, 31, 58, .2) 55%,
        transparent 100%
    );
    pointer-events: none;
    transition: background .35s ease;
}

.case-study-related__card:hover .case-study-related__shade {
    background: linear-gradient(
        to top,
        rgba(7, 31, 58, .9) 0%,
        rgba(7, 31, 58, .45) 55%,
        rgba(7, 31, 58, .12) 100%
    );
}

.case-study-related__label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;
    padding: 1.125rem 1.25rem;
    color: var(--heading-on-dark);
    transition: transform .35s ease;
}

.case-study-related__card:hover .case-study-related__label {
    transform: translateY(-3px);
}

.case-study-related__label strong {
    display: block;
    font-family: var(--font-head);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: .25rem;
}

.case-study-related__label span {
    font-size: .8125rem;
    font-weight: 500;
    color: rgba(255, 255, 255, .85);
}

@media (max-width: 900px) {
    .case-study-overview__layout {
        grid-template-columns: 1fr;
    }

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

    .case-study-gallery__item--feature {
        grid-column: span 2;
        grid-row: span 1;
        aspect-ratio: 16 / 10;
    }

    .case-study-related__grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin-inline: auto;
    }
}

@media (max-width: 768px) {
    .case-study-gallery__grid {
        grid-template-columns: 1fr;
    }

    .case-study-gallery__item--feature {
        grid-column: span 1;
    }
}

/* Full-screen lightbox */
body.photo-lightbox-open {
    overflow: hidden;
}

.photo-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 3vw, 2rem);
}

.photo-lightbox[hidden] {
    display: none;
}

.photo-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(7, 31, 58, .94);
    cursor: zoom-out;
}

.photo-lightbox__stage {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: min(1200px, 100%);
    max-height: calc(100vh - 4rem);
    margin: 0;
}

.photo-lightbox__image {
    display: block;
    max-width: 100%;
    max-height: calc(100vh - 7rem);
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 32px 80px rgba(0, 0, 0, .45);
}

.photo-lightbox__caption {
    margin: .875rem 0 0;
    font-size: .875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, .82);
    text-align: center;
}

.photo-lightbox__close,
.photo-lightbox__nav {
    position: absolute;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: rgba(255, 255, 255, .12);
    color: var(--white);
    cursor: pointer;
    transition: background .2s ease;
}

.photo-lightbox__close:hover,
.photo-lightbox__nav:hover {
    background: rgba(255, 255, 255, .22);
}

.photo-lightbox__close {
    top: 1rem;
    right: 1rem;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    font-size: 1.75rem;
    line-height: 1;
}

.photo-lightbox__nav {
    top: 50%;
    transform: translateY(-50%);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    font-size: 2rem;
    line-height: 1;
}

.photo-lightbox__nav--prev {
    left: 1rem;
}

.photo-lightbox__nav--next {
    right: 1rem;
}

@media (max-width: 768px) {
    .photo-lightbox__nav {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.625rem;
    }

    .photo-lightbox__nav--prev {
        left: .5rem;
    }

    .photo-lightbox__nav--next {
        right: .5rem;
    }

    .case-study-gallery__zoom {
        opacity: 1;
        transform: none;
    }
}