/* ============================================================
   NB Technologies — case-study template
   Loaded after assets/nb-base.css (tokens, nav, buttons, footer).
   Page files carry content only; build-cases.py renders them.
   ============================================================ */

/* ================= read progress ================= */
.progress{position:fixed;top:0;left:0;height:3px;width:0;
  background:var(--blue);z-index:80;transition:width .1s linear}

/* ================= hero ================= */
.case-hero{position:relative;overflow:hidden;padding-top:clamp(28px,4vh,44px);
  padding-bottom:calc(clamp(64px,9vh,120px) + clamp(36px,5vh,56px))}
.case-hero::before{content:"";position:absolute;top:-10%;right:-6%;
  width:min(52vw,760px);aspect-ratio:1023/441;
  background:url("brand/pattern-blue.svg") no-repeat center/contain;
  opacity:.055;pointer-events:none;z-index:-1;
  -webkit-mask-image:linear-gradient(205deg,#000 20%,transparent 78%);
  mask-image:linear-gradient(205deg,#000 20%,transparent 78%)}
.case-back{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;
  font-weight:600;color:var(--navy-70);transition:color .18s ease}
.case-back:hover{color:var(--blue)}
.case-back svg{transition:transform .18s ease}
.case-back:hover svg{transform:translateX(-4px)}

.hero-top{display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:clamp(24px,4vw,64px);align-items:end;margin-top:clamp(28px,4vh,44px)}
.case-cat{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.case-cat span{display:inline-flex;align-items:center;gap:9px;
  padding:7px 14px 7px 12px;border:1.5px solid var(--navy-14);
  border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--navy-70)}
.case-cat span::before{content:"";width:5px;height:12px;background:var(--blue);
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%);flex:none}
.case-title{margin-top:18px;font-weight:700;letter-spacing:-.04em;
  font-size:clamp(2.9rem,7.2vw,5.8rem);line-height:.98}
.case-sub{margin-top:20px;font-size:clamp(1.05rem,1.35vw,1.28rem);
  line-height:1.55;color:var(--navy-70);max-width:54ch}
.case-sub em{font-style:italic}
/* headline delivery claim, sits under the summary in the hero */
/* block, not flex: an inline <b> in a flex container becomes its own
   flex item and picks up the gap (and a line break in innerText) */
.case-flag{position:relative;display:inline-block;margin-top:24px;
  padding:11px 20px 11px 32px;border-radius:999px;background:var(--blue);
  color:#fff;font-size:14px;font-weight:600;letter-spacing:.01em}
.case-flag::before{content:"";position:absolute;left:16px;top:50%;
  margin-top:-7.5px;width:6px;height:15px;background:#fff;
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%)}
.case-flag b{font-weight:700}
.live-btn{flex:none}
.live-btn:hover svg{transform:translate(3px,-3px)}

.case-meta{display:grid;grid-template-columns:repeat(4,1fr);
  gap:clamp(16px,2vw,32px);margin-top:clamp(40px,6vh,64px)}
.case-meta>div{border-top:1.5px solid var(--navy-14);padding-top:16px;
  transition:border-color .25s ease}
.case-meta>div:hover{border-top-color:var(--blue)}
.case-meta h5{font-size:11.5px;font-weight:600;letter-spacing:.15em;
  text-transform:uppercase;color:var(--navy-55);margin-bottom:9px}
.case-meta p{font-size:15.5px;font-weight:600;line-height:1.45}
.case-meta a{color:var(--blue)}

/* ================= browser-chrome frame ================= */
.shot{display:flex;flex-direction:column;
  border-radius:clamp(14px,1.6vw,20px);overflow:hidden;
  background:var(--navy);border:1px solid var(--navy-14);
  box-shadow:0 18px 44px rgba(3,14,49,.14)}
.shot-bar{display:flex;align-items:center;gap:8px;padding:11px 16px;
  background:var(--white-8);flex:none}
.shot-bar i{width:9px;height:9px;border-radius:50%;flex:none;
  background:var(--white-16)}
.shot-url{margin-left:10px;flex:1;min-width:0;background:var(--white-8);
  border-radius:999px;padding:6px 14px;font-size:12px;font-weight:500;
  color:var(--white-70);white-space:nowrap;overflow:hidden;
  text-overflow:ellipsis}
/* the viewport: fixed aspect, image cropped from the top; hovering
   lets the page scroll down inside the frame */
.shot-view{position:relative;flex:1;min-height:0;overflow:hidden;
  background:#fff;aspect-ratio:var(--ar,16/9);container-type:size}
/* the page is always shown at full width; the frame only crops the
   bottom. 100cqh = frame height, so the shift lands the page's bottom
   edge on the frame's bottom edge (never shifts a short image). */
.shot-view img{position:absolute;top:0;left:0;width:100%;height:auto;
  transform:translateY(var(--shift,0));
  transition:transform 3.2s cubic-bezier(.4,.1,.2,1)}
/* .at-bottom pins the page's bottom edge to the frame's bottom edge;
   --shift picks an arbitrary region (a % of the page's own height) */
.shot-view.at-bottom img,
.shot.scrolls:hover .shot-view img{
  transform:translateY(min(0px,calc(100cqh - 100%)))}
.shot.fill .shot-view{aspect-ratio:auto}
/* block, not flex: inline <em> inside a flex caption would become its
   own flex item and wrap onto its own line */
.shot-cap{position:relative;display:block;padding-left:15px;margin-top:14px;
  font-size:13.5px;line-height:1.5;color:var(--navy-70)}
.shot-cap::before{content:"";position:absolute;left:0;top:5px;
  width:5px;height:12px;background:var(--blue);
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%)}

/* ================= cover band ================= */
.case-cover{position:relative;background:var(--navy);color:#fff;
  display:flow-root;padding-bottom:clamp(56px,8vh,96px)}
/* pattern stays inside the band on purpose: the band must NOT clip,
   because the cover frame overlaps upward into the hero */
.case-cover::before{content:"";position:absolute;left:2%;bottom:4%;
  width:min(44vw,620px);aspect-ratio:1023/441;
  background:url("brand/pattern-white.svg") no-repeat center/contain;
  opacity:.05;pointer-events:none;
  -webkit-mask-image:linear-gradient(25deg,#000 20%,transparent 75%);
  mask-image:linear-gradient(25deg,#000 20%,transparent 75%)}
.case-cover .shell-x{position:relative;
  margin-top:calc(clamp(64px,9vh,120px) * -1)}
.case-cover .shot{border-color:var(--white-16);
  box-shadow:0 30px 70px rgba(0,0,0,.45);--ar:16/9.6}
.case-cover .shot-cap{color:var(--white-70)}

/* ================= section headers ================= */
.case-body{padding-top:clamp(76px,11vh,130px)}
.sec-head{display:flex;align-items:baseline;gap:16px;flex-wrap:nowrap;
  border-top:1.5px solid var(--navy);padding-top:22px;
  margin-bottom:clamp(30px,4.5vh,48px)}
.sec-num{display:inline-flex;align-items:center;gap:8px;font-weight:600;
  font-size:14px;letter-spacing:.08em;color:var(--blue)}
.sec-num::before{content:"";width:6px;height:14px;background:var(--blue);
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%)}
.sec-title{font-weight:700;letter-spacing:-.03em;
  font-size:clamp(1.6rem,2.6vw,2.2rem);line-height:1.1}
.sec-note{margin-left:auto;align-self:center;font-size:13.5px;
  color:var(--navy-70);text-align:right;max-width:36ch}

/* ================= prose ================= */
.case-cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,80px)}
.case-cols>div+div{border-left:1px solid var(--navy-14);
  padding-left:clamp(28px,4vw,72px)}
.case-cols h3{display:flex;align-items:center;gap:12px;font-weight:700;
  letter-spacing:-.025em;font-size:clamp(1.3rem,1.8vw,1.6rem);margin-bottom:16px}
.case-cols h3::before{content:"";width:7px;height:16px;background:var(--blue);
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%);flex:none}
.prose p,.case-cols p{font-size:16.5px;line-height:1.7;color:var(--navy-70)}
.prose p+p,.case-cols p+p{margin-top:14px}
.case-cols em,.prose em{font-style:italic}
.pull{font-weight:600;letter-spacing:-.02em;
  font-size:clamp(1.15rem,1.7vw,1.5rem);line-height:1.45;color:var(--navy);
  border-left:3px solid var(--blue);padding-left:clamp(18px,2vw,26px)}
.pull.big{border:none;padding-left:0;max-width:24ch;
  font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.25;letter-spacing:-.03em}
.pull.big::before{content:"\201C";color:var(--blue)}
.pull.big::after{content:"\201D";color:var(--blue)}
.attrib{margin-top:16px;font-size:13.5px;color:var(--navy-70);
  padding-left:clamp(18px,2vw,26px)}
.pull.big+.attrib{padding-left:0;font-weight:500}

/* ================= (02) deliverables ================= */
.case-scope{margin-top:clamp(64px,9vh,110px)}
.deliver{list-style:none;counter-reset:d;display:grid;
  grid-template-columns:1fr 1fr;gap:clamp(24px,3vw,44px)}
.deliver li{counter-increment:d;border-top:1px solid var(--navy-14);
  padding-top:20px}
.deliver h4{display:flex;gap:12px;font-weight:700;letter-spacing:-.02em;
  font-size:clamp(1.05rem,1.4vw,1.25rem);line-height:1.3;margin-bottom:10px}
.deliver h4::before{content:counter(d,decimal-leading-zero);
  color:var(--blue);font-size:13px;font-weight:600;letter-spacing:.06em;
  padding-top:4px;flex:none}
.deliver p{font-size:15.5px;line-height:1.65;color:var(--navy-70);
  padding-left:34px}

/* ---- gallery: one tall frame, two detail frames ---- */
/* the tall frame sets the row height; the two side frames stretch to
   match it. Every frame shows its page at full width and crops the
   bottom — long pages scroll inside the frame on hover. */
.gallery{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  grid-template-rows:1fr 1fr;gap:clamp(18px,2.2vw,28px);
  margin-top:clamp(44px,6vh,72px)}
.gallery>figure{display:flex;flex-direction:column;min-width:0;min-height:0}
.gallery>figure .shot{flex:1;min-height:0}
.g-main{grid-row:1/3}
.g-main .shot-view{--ar:1/1.12}
.g-side .shot-view{aspect-ratio:auto}
/* stacked variant for short interface studies: every frame takes its
   image's own height, the first spans the full width */
.gallery.stack{grid-template-columns:1fr 1fr;grid-template-rows:auto}
.gallery.stack .g-main{grid-column:1/-1;grid-row:auto}
.gallery.stack .shot-view{aspect-ratio:auto;container-type:normal;flex:none}
.gallery.stack .shot-view img{position:static}

/* full-scope disclosure */
.scope-all{margin-top:clamp(36px,5vh,56px);border-top:1px solid var(--navy-14);
  padding-top:22px}
.scope-all summary{cursor:pointer;list-style:none;display:inline-flex;
  align-items:center;gap:10px;font-size:14.5px;font-weight:600;
  color:var(--navy);transition:color .18s ease}
.scope-all summary::-webkit-details-marker{display:none}
.scope-all summary::before{content:"+";display:grid;place-items:center;
  width:22px;height:22px;border-radius:50%;background:var(--blue);
  color:#fff;font-size:15px;font-weight:600;flex:none}
.scope-all[open] summary::before{content:"\2212"}
.scope-all summary:hover{color:var(--blue)}
.scope-all .chips{margin-top:22px}

/* ================= chips ================= */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips span{display:inline-flex;align-items:center;gap:9px;
  padding:10px 18px 10px 16px;border-radius:999px;font-size:14.5px;
  white-space:nowrap;transition:border-color .2s ease,color .2s ease}
.chips span::before{content:"";width:5px;height:12px;background:var(--blue);
  clip-path:polygon(100% 0,100% 73%,0 100%,0 27%);flex:none}
.chips.solid span{border:1.5px solid var(--navy);font-weight:600}
.chips.solid span:hover{border-color:var(--blue);color:var(--blue)}
.chips.light span{border:1.5px solid var(--navy-14);font-weight:500}
.chips.light span:hover{border-color:var(--blue)}

/* ================= (03) stack & delivery ================= */
.case-stack{margin-top:clamp(64px,9vh,110px)}
.stack-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:clamp(28px,4vw,64px)}
.deliver-meta+.deliver-meta{margin-top:clamp(22px,3vh,32px)}
.deliver-meta h5{font-size:11.5px;font-weight:600;letter-spacing:.15em;
  text-transform:uppercase;color:var(--navy-55);margin-bottom:9px}
.deliver-meta p{font-size:16.5px;font-weight:600;line-height:1.5;max-width:44ch}
.stack-grid>div+div{border-left:1px solid var(--navy-14);
  padding-left:clamp(28px,4vw,64px)}
.stack-grid h5{font-size:11.5px;font-weight:600;letter-spacing:.15em;
  text-transform:uppercase;color:var(--navy-55);margin-bottom:16px}

/* ================= (04) results — navy ================= */
.case-results{position:relative;background:var(--navy);color:#fff;
  margin-top:clamp(76px,11vh,130px);padding:clamp(76px,11vh,120px) 0;
  overflow:hidden}
.case-results::before{content:"";position:absolute;top:-6%;right:-6%;
  width:min(48vw,680px);aspect-ratio:1023/441;
  background:url("brand/pattern-white.svg") no-repeat center/contain;
  opacity:.05;pointer-events:none;
  -webkit-mask-image:linear-gradient(210deg,#000 20%,transparent 75%);
  mask-image:linear-gradient(210deg,#000 20%,transparent 75%)}
.case-results .shell-x{position:relative}
.case-results .sec-head{border-top-color:var(--white-16)}
.case-results .sec-title{color:#fff}
.case-results .sec-note{color:var(--white-70)}
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(20px,3vw,48px)}
.res-stat{border-top:1.5px solid var(--white-16);padding-top:22px;
  transition:border-color .25s ease}
.res-stat:hover{border-top-color:var(--blue)}
.res-num{font-weight:700;letter-spacing:-.035em;
  font-size:clamp(2.6rem,4.4vw,4rem);line-height:1;color:var(--blue)}
.res-lbl{margin-top:12px;font-size:15px;color:var(--white-70);line-height:1.55}
.res-context{margin-top:clamp(48px,7vh,80px);border-left:3px solid var(--blue);
  padding-left:clamp(20px,2.4vw,32px);max-width:780px}
.res-context h6{font-size:12.5px;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--white-70);margin-bottom:14px}
.res-context p{font-weight:600;letter-spacing:-.02em;
  font-size:clamp(1.1rem,1.6vw,1.4rem);line-height:1.5}
.res-context em{font-style:italic}

/* ================= (05) quote ================= */
.case-quote{padding-top:clamp(76px,11vh,120px)}

/* ================= related work ================= */
.case-related{padding-top:clamp(76px,11vh,120px)}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(16px,2vw,28px)}
.rel-card{display:block;border:1.5px solid var(--navy-14);border-radius:20px;
  overflow:hidden;padding-bottom:22px;background:#fff;
  transition:transform .25s var(--ease),border-color .25s ease,
    box-shadow .25s ease}
.rel-card:hover{transform:translateY(-6px);border-color:var(--blue);
  box-shadow:0 20px 40px rgba(3,14,49,.10)}
.rel-thumb{display:block;overflow:hidden;background:var(--blue-10);
  border-bottom:1.5px solid var(--navy-14)}
.rel-thumb img{aspect-ratio:16/10;object-fit:cover;object-position:top;
  width:100%;transition:transform .4s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.05)}
.rel-blank{display:grid;place-items:center;aspect-ratio:16/10;
  background:var(--navy);color:#fff;transition:background .25s ease}
.rel-card:hover .rel-blank{background:var(--blue)}
.rel-cat{display:block;margin:20px clamp(18px,2vw,24px) 0;font-size:12px;
  font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--blue)}
.rel-name{display:block;margin:8px clamp(18px,2vw,24px) 0;font-weight:700;
  letter-spacing:-.025em;font-size:clamp(1.15rem,1.6vw,1.45rem)}

/* ================= closing CTA — blue ================= */
.case-cta{position:relative;background:var(--blue);color:#fff;overflow:hidden;
  margin-top:clamp(76px,11vh,120px);padding:clamp(72px,10vh,110px) 0}
.case-cta::before{content:"";position:absolute;right:-8%;top:50%;
  transform:translateY(-50%);width:min(56vw,820px);aspect-ratio:1023/441;
  background:url("brand/pattern-white.svg") no-repeat center/contain;
  opacity:.12;pointer-events:none;
  -webkit-mask-image:linear-gradient(270deg,#000 30%,transparent 95%);
  mask-image:linear-gradient(270deg,#000 30%,transparent 95%)}
.case-cta .shell-x{position:relative}
.cta-title{font-weight:700;letter-spacing:-.035em;
  font-size:clamp(2rem,4.4vw,3.4rem);line-height:1.05}
.cta-sub{margin-top:18px;font-size:clamp(1rem,1.2vw,1.15rem);line-height:1.6;
  color:var(--white-70);max-width:50ch}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(28px,4vh,40px)}
.case-cta .btn-ghost{border-color:var(--white-40);color:#fff}
.case-cta .btn-ghost:hover{border-color:#fff;background:#fff;color:var(--blue)}

/* ================= responsive ================= */
@media (max-width:900px){
  .hero-top{grid-template-columns:1fr;align-items:start}
  .live-btn{justify-self:start}
  .case-meta{grid-template-columns:repeat(2,1fr)}
  .case-cols{grid-template-columns:1fr}
  .case-cols>div+div{border-left:none;padding-left:0;
    border-top:1px solid var(--navy-14);padding-top:26px}
  .sec-note{display:none}
  .deliver{grid-template-columns:1fr;gap:26px}
  .gallery,.gallery.stack{grid-template-columns:1fr;grid-template-rows:auto}
  .g-main,.gallery.stack .g-main{grid-row:auto;grid-column:auto}
  .g-side .shot-view{aspect-ratio:16/10}
  .stack-grid{grid-template-columns:1fr}
  .stack-grid>div+div{border-left:none;padding-left:0;
    border-top:1px solid var(--navy-14);padding-top:26px}
  .res-grid{grid-template-columns:1fr;gap:26px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .rel-grid{grid-template-columns:1fr}
  .rel-card.rel-all .rel-blank{aspect-ratio:16/5}
  .case-meta{grid-template-columns:1fr;gap:20px}
  .shot-url{display:none}
  .case-cta .btn{width:100%;justify-content:center}
  .case-hero::before{width:90vw;right:-25%}
}
@media (prefers-reduced-motion:reduce){
  .shot-view img,.rel-thumb img{transition:none}
  .shot.scrolls:hover .shot-view img{transform:none}
  .rel-card,.rel-card:hover{transform:none}
  .progress{transition:none}
}