/* ===========================================================================
   Case-study section kit. Loaded after styles.css (shares tokens).
   Blocks: hero · showcase · about · process · features-list · features-ps ·
   narrative · principles · impact/takeaways grid · ds-callout · gallery ·
   figure · video · summary · contributions.
   =========================================================================== */

/* ---- case hero ---- */
.c-eyebrow{font-weight:600;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--acc-ink);margin:64px 0 20px}
.c-title{font-family:var(--disp);font-weight:700;font-size:clamp(52px,10vw,104px);
  line-height:.9;letter-spacing:-.035em;margin-bottom:24px}
.c-title .d{color:var(--acc)}
.c-lede{font-size:clamp(17px,2.2vw,22px);line-height:1.5;max-width:40ch;margin-bottom:44px}

.c-meta{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding-bottom:26px}
.c-meta .k{font-size:12px;color:var(--muted);margin-bottom:7px}
.c-meta .v{font-size:14.5px;font-weight:500}
.c-tags{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:60px;border-bottom:1px solid var(--line)}
.c-tag{font-size:12.5px;font-weight:500;padding:5px 12px;border:1px solid var(--line);
  border-radius:100px;color:var(--muted)}

/* ---- showcase (cover) ---- */
.showcase{margin:60px 0;background:var(--surf);border-radius:20px;overflow:hidden;
  border:1px solid var(--line)}
.showcase img{width:100%}

/* ---- editorial block: kicker-left + content-right ---- */
.blk{display:grid;grid-template-columns:150px minmax(0,1fr);gap:28px;padding:58px 0;
  border-bottom:1px solid var(--line)}
.blk:last-child{border-bottom:0}
.blk > .kick{padding-top:8px}
.say{font-family:var(--disp);font-weight:500;font-size:clamp(22px,3.2vw,30px);
  line-height:1.24;letter-spacing:-.02em;margin-bottom:16px}
.bd{font-size:16px;color:var(--muted);max-width:56ch}
.bd + .bd{margin-top:14px}

/* ---- about / two-column ---- */
.two{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.two h3{font-family:var(--body);font-weight:600;font-size:13px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--ink);margin-bottom:10px}

/* ---- process steps / decisions ---- */
.step{padding:24px 0;border-top:1px solid var(--line)}
.step:first-child{border-top:0;padding-top:0}
.step .n{font-family:var(--disp);font-weight:600;font-size:14px;color:var(--acc);margin-bottom:8px}
.step h3{font-family:var(--disp);font-weight:600;font-size:clamp(19px,2.4vw,24px);
  letter-spacing:-.02em;margin-bottom:8px}

/* ---- features (simple list) ---- */
.feat{padding:24px 0;border-top:1px solid var(--line)}
.feat:first-child{border-top:0;padding-top:0}
.feat .n{font-family:var(--disp);font-weight:600;font-size:14px;color:var(--acc);margin-bottom:8px}
.feat h3{font-family:var(--disp);font-weight:600;font-size:clamp(20px,2.6vw,26px);
  letter-spacing:-.02em;margin-bottom:8px}

/* ---- features (problem / solution) ---- */
.ps{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:14px}
.ps .lab{font-weight:600;font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);margin-bottom:6px}
.ps .lab.sol{color:var(--acc-ink)}
.ps p{font-size:15px;color:var(--muted)}

/* ---- principles (compact grid) ---- */
.principles{display:grid;grid-template-columns:1fr 1fr;gap:26px 32px}
.principles .pr .n{font-family:var(--disp);font-weight:600;font-size:14px;color:var(--acc);margin-bottom:6px}
.principles .pr h3{font-family:var(--disp);font-weight:600;font-size:18px;letter-spacing:-.01em;margin-bottom:6px}
.principles .pr p{font-size:14.5px;color:var(--muted)}

/* ---- impact / takeaways (3-col) ---- */
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cols .cat{font-family:var(--disp);font-weight:600;font-size:16px;letter-spacing:-.01em;margin-bottom:12px}
.cols ul{list-style:none}
.cols li{font-size:14px;color:var(--muted);padding-left:16px;position:relative;
  margin-bottom:9px;line-height:1.45}
.cols li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;
  border-radius:50%;background:var(--acc)}

/* ---- design-system callout ---- */
.ds-badge{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--acc-ink);
  background:rgba(61,90,254,.1);padding:6px 12px;border-radius:100px;margin-bottom:16px}

/* ---- figure (inline image + caption) ---- */
.fig{margin-top:22px}
.fig .frame{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--surf)}
.fig .frame img{width:100%}
.fig.phone{max-width:400px;margin-left:auto;margin-right:auto}
.fig .frame video{display:block;width:auto;max-width:100%;max-height:600px;margin:0 auto;background:#000}
.fig figcaption{font-size:13px;color:var(--muted);margin-top:10px;max-width:60ch}

/* ---- gallery (captioned series) ---- */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.gallery .fig{margin-top:0}

/* ---- wireflow stack: wide detailed diagrams, span full width + legible ---- */
.wf{grid-column:1/-1;display:flex;flex-direction:column;gap:24px;margin-top:10px}
.wf .fig{margin-top:0}

/* ---- summary / contributions ---- */
.contrib{list-style:none;margin-top:6px}
.contrib li{padding:14px 0;border-top:1px solid var(--line);font-size:15px}
.contrib li:first-child{border-top:0}
.contrib li b{font-family:var(--disp);font-weight:600}
.contrib li span{color:var(--muted);display:block;font-size:14px;margin-top:2px}

/* ---- footer prev/next ---- */
.foot .nav2{display:flex;gap:18px;margin-top:30px;font-weight:500;font-size:14px;color:var(--muted)}
.foot .nav2 a{color:var(--muted)}
.foot .nav2 a:hover{color:var(--ink)}

/* ---- responsive ---- */
@media (max-width:680px){
  .blk{grid-template-columns:minmax(0,1fr);gap:14px}
  .c-meta{grid-template-columns:1fr 1fr}
  .two,.ps,.cols,.principles{grid-template-columns:1fr;gap:18px}
  .showcase{margin:40px 0}
}