/* ---------- content blocks (shared by case studies and the About window) ---------- */
.bk-root{--bk-fg:var(--ink);--bk-dim:var(--ink-2);--bk-acc:var(--acc);--bk-line:var(--line-2);--bk-font:var(--f-display);display:grid;gap:22px;min-width:0}
#case{--bk-fg:var(--c-fg);--bk-dim:var(--c-dim);--bk-acc:var(--c-a);--bk-line:var(--c-line);--bk-font:var(--c-font)}
.bk-p{font-size:15px;line-height:1.65;color:var(--bk-fg);max-width:62ch;margin:0}
.bk-p.lead{font-family:var(--bk-font);font-size:clamp(20px,2.4vw,34px);line-height:1.22;letter-spacing:-.02em}
.bk-h{margin:0;display:flex;align-items:center;gap:14px;color:var(--bk-acc)}
.bk-h::before{content:"";width:34px;height:2px;background:currentColor}
.bk-h .mono{color:inherit;font-weight:500}
.bk-fig{margin:0;position:relative;overflow:hidden;border-radius:6px;background:color-mix(in srgb,var(--bk-fg) 8%,transparent);min-width:0}
.bk-img{cursor:zoom-in}
.bk-img img{display:block;width:100%;height:auto;transition:transform .8s var(--spring)}
.bk-img:hover img,.bk-img:focus-visible img{transform:scale(1.025)}
.bk-img:focus-visible{outline:2px solid var(--bk-acc);outline-offset:3px}
.bk-vid video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.bk-vid.film video{object-fit:contain}
.bk-play{position:absolute;inset:0;display:grid;place-items:center;background:linear-gradient(transparent 40%,rgba(0,0,0,.35));z-index:2}
.bk-play span{width:clamp(56px,8vw,88px);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;background:var(--bk-acc);color:var(--c-bg,var(--on-acc));font-size:clamp(18px,2.4vw,28px);padding-left:.12em;transition:transform .5s var(--spring)}
.bk-play:hover span{transform:scale(1.12)}
.bk-vid.playing .bk-play{display:none}
.bk-one{display:grid;gap:0;min-width:0}
.bk-cap{margin:10px 0 0;color:var(--bk-dim);max-width:70ch}
.bk-gridwrap{display:grid;min-width:0}
.bk-grid{display:grid;grid-template-columns:repeat(var(--n,2),minmax(0,1fr));gap:clamp(10px,1.6vw,22px);align-items:start}
.bk-cell{display:grid;min-width:0}
.bk-split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(18px,4vw,60px);align-items:center}
.bk-splitcol{display:grid;gap:12px;min-width:0;align-content:center}
.bk-stat{display:grid;gap:10px;padding-block:clamp(6px,2vw,28px);border-top:1px solid var(--bk-line)}
.bk-stat b{font-family:var(--bk-font);font-weight:var(--c-w,800);font-size:clamp(56px,12vw,190px);line-height:.88;letter-spacing:-.05em;color:var(--bk-acc)}
.bk-stat p{font-size:clamp(17px,1.9vw,26px);line-height:1.3;max-width:30ch;margin:0}
.bk-stat .mono{color:var(--bk-dim)}
.bk-quote{margin:0;font-family:var(--bk-font);font-weight:var(--c-w,800);font-size:clamp(26px,4.6vw,78px);line-height:1;letter-spacing:-.04em;text-wrap:balance;color:var(--bk-fg)}
.bk-strip{display:flex;flex-wrap:wrap;gap:clamp(8px,1.4vw,18px);align-items:flex-end}
.bk-strip img{height:clamp(54px,7vw,104px);width:auto;transition:transform .6s var(--spring)}
.bk-strip img:hover{transform:translateY(-8px) rotate(-5deg) scale(1.08)}
.bk-hero img{display:block;width:100%;height:auto}

/* case-study layout: 12-column grid, text narrower than media */
#case .cs-blocks{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(10px,2vw,28px);row-gap:clamp(30px,5vw,76px);padding:clamp(40px,7vw,110px) var(--pad)}
#case .cs-blocks>.bk-p,#case .cs-blocks>.bk-h{grid-column:3/11;font-size:clamp(16px,1.35vw,19px)}
#case .cs-blocks>.bk-p.lead{grid-column:2/12;font-size:clamp(22px,2.7vw,42px);max-width:30em}
#case .cs-blocks>.bk-one,#case .cs-blocks>.bk-gridwrap,#case .cs-blocks>.bk-split,#case .cs-blocks>.bk-stat,#case .cs-blocks>.bk-quote,#case .cs-blocks>.bk-strip{grid-column:2/12}
#case .cs-blocks>.bk-toybox{grid-column:1/-1}
#case .bk-p{color:color-mix(in srgb,var(--bk-fg) 86%,transparent)}
#case .bk-p.lead{color:var(--bk-fg)}
@media (max-width:760px){
  #case .cs-blocks>*{grid-column:1/-1!important}
  .bk-split{grid-template-columns:1fr}
  .bk-grid.n3,.bk-grid.n4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@container win (max-width:560px){
  .bk-split{grid-template-columns:1fr}
  .bk-grid.n3,.bk-grid.n4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:2600;background:rgba(8,12,9,.92);display:grid;place-items:center;padding:clamp(14px,3vw,40px);animation:lbin .3s ease;cursor:zoom-out}
.lightbox.out{opacity:0;transition:opacity .25s}
@keyframes lbin{from{opacity:0}}
.lb-stage{display:grid;gap:12px;justify-items:center;max-width:100%;max-height:100%}
.lightbox img{max-width:min(100%,1600px);max-height:calc(100vh - 110px);width:auto;height:auto;border-radius:6px;box-shadow:0 30px 90px -20px rgba(0,0,0,.7);cursor:default}
.lb-cap{color:#cfd8c4;text-align:center;max-width:70ch}
.lb-x{position:absolute;right:clamp(14px,2vw,28px);top:calc(clamp(14px,2vw,28px) + env(safe-area-inset-top,0px));width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.12);color:#fff;font-size:15px}
.lb-x:hover{background:var(--acc);color:var(--on-acc)}



/* ---------- interactive images ---------- */
.bk-cut{background:none;border-radius:0;overflow:visible;cursor:default;will-change:transform}
.bk-cut img{filter:drop-shadow(0 22px 28px rgba(0,0,0,.28));transition:none}
.bk-cut:hover img,.bk-cut:focus-visible img{transform:none}
.bk-cut:not(.is-tilt){cursor:zoom-in}
.bk-cut.is-tilt{animation:floaty 6s ease-in-out infinite}
@keyframes floaty{50%{translate:0 -8px}}
.bk-strip{position:relative;min-height:clamp(70px,9vw,130px)}
.bk-strip img.is-toss{cursor:grab;touch-action:none;user-select:none;-webkit-user-drag:none;filter:drop-shadow(0 8px 10px rgba(0,0,0,.2));will-change:transform}
.bk-strip img.is-toss.held{cursor:grabbing;filter:drop-shadow(0 18px 22px rgba(0,0,0,.3));z-index:4}
.hp{position:fixed;left:0;top:0;z-index:2400;width:clamp(180px,20vw,300px);pointer-events:none;opacity:0;transition:opacity .25s;will-change:transform}
.hp.on{opacity:1}
.hp img{display:block;width:100%;height:auto;border-radius:6px;box-shadow:0 24px 60px -18px rgba(0,0,0,.5)}
@media (prefers-reduced-motion:reduce){.bk-cut.is-tilt{animation:none}}