/* ==========================================================================
   Social Responsibility (about-us/social-responsibility.php)
   Editorial split header + staggered photo cards + full-screen viewer.
   ========================================================================== */

/* Intro ------------------------------------------------------------------- */

.csr-intro { padding: 3rem 0 6rem; }

.csr-intro__grid {
    display: grid;
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.4fr);
    gap: 2rem 5rem;
    margin-top: 1rem;
}

.csr-intro__aside {
    position: sticky;
    top: calc(var(--ph-header-h) + 32px);
    align-self: start;
}

.csr-intro__title {
    margin: 0 0 1.75rem;
    font-size: clamp(2.6rem, 1.6rem + 4.4vw, 5rem);
    font-weight: 800;
    line-height: .98;
    letter-spacing: 0;
}

.csr-intro__rule {
    display: block;
    width: 72px;
    height: 4px;
    border-radius: 2px;
    background: var(--ph-red);
}

.csr-intro__text {
    margin: .5rem 0 0;
    font-size: clamp(1.05rem, 1rem + .35vw, 1.25rem);
    line-height: 1.8;
    color: var(--ph-body);
}

.csr-intro__text p { margin: 0 0 1rem; }
.csr-intro__text p:last-child { margin-bottom: 0; }

.csr-intro__text::first-line { color: var(--ph-red-strong); }

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

.csr-gallery {
    position: relative;
    padding: 6rem 0 9rem;
    background:
        radial-gradient(50% 60% at 100% 0%, rgba(236, 31, 39, .2) 0%, rgba(236, 31, 39, 0) 70%),
        #12151d;
}

.csr-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Staggered heights */
.csr-grid li:nth-child(even) { transform: translateY(3rem); }

.csr-card {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    border-radius: 6px;
    overflow: hidden;
    background: #000;
    color: var(--ph-white);
    text-align: start;
    cursor: zoom-in;
    box-shadow: 0 40px 70px -40px rgba(0, 0, 0, .9);
}

.csr-card__media {
    display: block;
    aspect-ratio: 3 / 4;
}

.csr-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .8s cubic-bezier(.2, .7, .2, 1), filter .6s ease;
    filter: saturate(.9);
}

.csr-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(8, 11, 18, .92) 0%, rgba(8, 11, 18, .3) 45%, rgba(8, 11, 18, 0) 70%);
    pointer-events: none;
}

.csr-card__num {
    position: absolute;
    top: 1rem;
    inset-inline-start: 1.1rem;
    z-index: 1;
    font-family: var(--ph-font-heading);
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .14em;
    color: rgba(255, 255, 255, .85);
}

.csr-card__caption {
    position: absolute;
    inset-inline-start: 1.1rem;
    inset-inline-end: 1.1rem;
    bottom: 1.1rem;
    z-index: 1;
    padding-inline-start: .75rem;
    border-inline-start: 3px solid var(--ph-red);
    font-family: var(--ph-font-heading);
    font-size: clamp(1rem, .9rem + .35vw, 1.2rem);
    font-weight: 700;
    line-height: 1.3;
}

.csr-card__zoom {
    position: absolute;
    top: .8rem;
    inset-inline-end: .8rem;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .14);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0;
    transform: scale(.8);
    transition: opacity .3s ease, transform .3s ease, background-color .2s ease;
}

.csr-card:hover .csr-card__media img,
.csr-card:focus-visible .csr-card__media img { transform: scale(1.06); filter: saturate(1.05); }

.csr-card:hover .csr-card__zoom,
.csr-card:focus-visible .csr-card__zoom { opacity: 1; transform: none; background: var(--ph-red-strong); }

/* Viewer ------------------------------------------------------------------ */

.csr-viewer .modal-content {
    position: relative;
    border: 0;
    border-radius: 6px;
    background: #0b0f17;
    overflow: hidden;
}

.modal-backdrop.show { opacity: .85; }

.csr-viewer .carousel-item { margin: 0; }

.csr-viewer .carousel-item img {
    display: block;
    width: 100%;
    max-height: 78vh;
    object-fit: contain;
    background: #000;
}

.csr-viewer figcaption {
    padding: 1.1rem 1.5rem 0;
    color: var(--ph-white);
    font-family: var(--ph-font-heading);
    font-size: 1.1rem;
    font-weight: 700;
}

.csr-viewer__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .9rem 1.5rem 1.25rem;
}

.csr-viewer__count {
    font-family: var(--ph-font-heading);
    font-weight: 700;
    color: #8a919e;
}

.csr-viewer__count span { color: var(--ph-white); }

.csr-viewer__controls { display: flex; gap: .5rem; }

.csr-viewer__btn,
.csr-viewer__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 3px;
    background: #1f2531;
    color: var(--ph-white);
    transition: background-color .2s ease;
}

.csr-viewer__btn:hover,
.csr-viewer__close:hover { background: var(--ph-red-strong); }

.csr-viewer__close {
    position: absolute;
    top: .75rem;
    inset-inline-end: .75rem;
    z-index: 3;
    border-radius: 50%;
    background: rgba(0, 0, 0, .55);
}

/* Responsive -------------------------------------------------------------- */

@media (max-width: 991.98px) {
    .csr-intro { padding-bottom: 4.5rem; }
    .csr-intro__grid { grid-template-columns: 1fr; }
    .csr-intro__aside { position: static; }
    .csr-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .csr-gallery { padding: 4.5rem 0 7rem; }
}

@media (max-width: 575.98px) {
    .csr-intro { padding: 2rem 0 3.5rem; }
    .csr-grid { gap: 1rem; }
    .csr-grid li:nth-child(even) { transform: translateY(2rem); }
    .csr-card__caption { font-size: .9rem; inset-inline-start: .75rem; inset-inline-end: .75rem; bottom: .75rem; padding-inline-start: .55rem; }
    .csr-card__num { top: .7rem; inset-inline-start: .75rem; }
    .csr-card__zoom { opacity: 1; transform: none; width: 32px; height: 32px; top: .55rem; inset-inline-end: .55rem; }
    .csr-gallery { padding: 3.5rem 0 5.5rem; }
}

@media (prefers-reduced-motion: reduce) {
    .csr-card__media img { transition: none; }
}