/* ═══ Case-study pages ═════════════════════════════════════════════════ */

.case-hero{padding:62px 0 52px;max-width:920px;position:relative}
.case-hero::before{
  content:"";position:absolute;top:-140px;left:-240px;width:660px;height:660px;
  background:radial-gradient(circle,rgba(99,102,241,.075),transparent 62%);
  pointer-events:none;z-index:-1;
}
.back-link{
  display:inline-block;font:500 12px var(--mono);letter-spacing:.1em;color:var(--dim);
  margin-bottom:30px;text-transform:uppercase;transition:color .2s;
}
.back-link:hover{color:var(--accent)}
.case-hero h1{font-size:clamp(36px,5vw,62px);max-width:15ch}
.case-codename{font:500 11px var(--mono);letter-spacing:.1em;color:var(--dim);margin:20px 0 0;text-transform:uppercase}
.case-codename b{color:var(--accent);font-weight:600}
.case-lede{font-size:18px;color:var(--muted);max-width:66ch;margin:22px 0 0;line-height:1.72}

.case-meta{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin:42px 0 34px;
  background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;
}
.case-meta div{background:var(--surface);padding:18px 20px}
.case-meta dt{font:600 10px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.case-meta dd{margin:8px 0 0;font-size:14px;font-weight:500;line-height:1.5;color:var(--ink)}

.case-stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:18px;padding:34px;
  background:linear-gradient(150deg,#16161c,#0e0e12);border:1px solid var(--line-2);
  border-radius:var(--radius);position:relative;overflow:hidden;
}
.case-stats::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),var(--accent-2),transparent);
}
.case-stats div{display:flex;flex-direction:column;gap:7px}
.case-stats strong{
  font:700 36px var(--display);letter-spacing:-.05em;
  background:linear-gradient(140deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.case-stats span{font:11px var(--mono);color:var(--dim);line-height:1.5;letter-spacing:.04em}

.case-section{padding:58px 0;border-bottom:1px solid var(--line)}
.case-section:last-of-type{border-bottom:0}
.case-grid{display:grid;grid-template-columns:220px 1fr;gap:56px;align-items:start}
.case-side{position:sticky;top:100px}
.case-side .eyebrow{margin:0}
.case-side-note{font-size:13px;color:var(--dim);margin:12px 0 0;line-height:1.6}
.case-body{max-width:72ch}
.case-body>p{margin:0 0 18px;font-size:16px;color:var(--muted);line-height:1.78}
.case-body>p:last-child{margin-bottom:0}
.case-body strong{color:var(--ink);font-weight:600}
.case-body em{color:var(--ink);font-style:italic}

.diagram-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:16px;
  background:linear-gradient(160deg,#121217,#0d0d11);
}
.diagram{
  margin:0;padding:26px 28px;font:13px/1.9 var(--mono);color:#b9b9c8;
  white-space:pre;min-width:min-content;
}

.log{list-style:none;counter-reset:log;margin:0;padding:0}
.log li{counter-increment:log;position:relative;padding:0 0 30px 58px;border-left:1px solid var(--line);margin-left:14px}
.log li:last-child{padding-bottom:0;border-left-color:transparent}
.log li::before{
  content:counter(log,decimal-leading-zero);position:absolute;left:-15px;top:0;
  width:30px;height:30px;display:grid;place-items:center;background:var(--accent);
  color:var(--on-accent);border-radius:9px;font:700 11px var(--mono);
  box-shadow:0 0 20px rgba(99,102,241,.25);
}
.log h3{font-size:19px;margin:4px 0 10px;letter-spacing:-.03em}
.log p{margin:0;font-size:15px;color:var(--muted);line-height:1.78}

.walk{list-style:none;counter-reset:walk;margin:0;padding:0}
.walk li{counter-increment:walk;margin:0 0 26px}
.walk li:last-child{margin-bottom:0}
.walk h3{font-size:16.5px;margin:0 0 10px;letter-spacing:-.02em;display:flex;align-items:center;gap:11px;flex-wrap:wrap}
.walk h3::before{
  content:"STEP " counter(walk,decimal-leading-zero);flex:none;
  font:600 10px var(--mono);letter-spacing:.12em;color:var(--accent);
  border:1px solid var(--line-2);border-radius:999px;padding:5px 11px;
}
.walk p{margin:0 0 12px;font-size:15px;color:var(--muted);line-height:1.75}

pre.code{
  margin:0;padding:20px 22px;background:#0d0d11;color:#d6d6e2;
  border:1px solid var(--line);border-radius:14px;overflow-x:auto;
  font:13px/1.8 var(--mono);
}
pre.code code{background:none;padding:0;color:inherit;font:inherit}

.chips.big{margin:0 0 30px}
.chips.big span{font-size:12px;padding:8px 13px}
.case-repo-cta{margin-top:4px}

.case-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:52px 0 76px}
.pager-link{
  display:flex;flex-direction:column;gap:9px;padding:26px 28px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--surface);
  transition:transform .32s,border-color .32s,box-shadow .32s;
}
.pager-link:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:0 18px 48px rgba(0,0,0,.5)}
.pager-link.next{text-align:right}
.pager-dir{font:600 10px var(--mono);letter-spacing:.14em;color:var(--dim);text-transform:uppercase}
.pager-title{font:700 20px var(--display);letter-spacing:-.035em;color:var(--ink)}

/* Live-demo status row */
.case-live{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:0 0 26px;padding:16px 20px;
  border:1px solid var(--line);border-radius:14px;background:var(--surface);
  font-size:14px;color:var(--muted);
}
.case-live .live-badge{flex:none}
.case-live .dot-idle{
  display:inline-flex;align-items:center;gap:6px;font:600 10px var(--mono);letter-spacing:.12em;
  color:var(--dim);border:1px solid var(--line-2);border-radius:999px;padding:4px 10px;text-transform:uppercase;
}

@media (max-width:900px){
  .case-meta{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr;gap:26px}
  .case-side{position:static}
}
@media (max-width:640px){
  .case-hero{padding:42px 0 36px}
  .case-meta{grid-template-columns:1fr}
  .case-stats{padding:26px}
  .case-stats strong{font-size:30px}
  .case-section{padding:42px 0}
  .log li{padding-left:42px}
  .case-pager{grid-template-columns:1fr}
  .pager-link.next{text-align:left}
}