/* Shared styles for 8 by 8 case studies — monochrome, IBM Plex Mono */
:root{
  --ink:#121315; --ink-soft:#3b3f44; --muted:#6b7075;
  --paper:#ffffff; --panel:#fafafa; --tint:#f0f0f1;
  --line:#e2e2e4; --accent:#121315;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--mono);
  font-size:15px;line-height:1.6;letter-spacing:-.01em;-webkit-font-smoothing:antialiased}
a{color:inherit}
.wrap{max-width:980px;margin:0 auto;padding:0 24px}
.topbar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.9);
  position:sticky;top:0;z-index:10;backdrop-filter:saturate(140%) blur(8px)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.mark{font-weight:800;letter-spacing:-.02em;font-size:19px;text-decoration:none}
.back{font-size:13px;color:var(--muted);text-decoration:none}
.back:hover{color:var(--ink)}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
h1{font-size:clamp(26px,4vw,40px);font-weight:800;letter-spacing:-.035em;line-height:1.1;margin:.5rem 0}
h2{font-size:20px;font-weight:700;letter-spacing:-.02em;margin:34px 0 8px}
.lead{color:var(--ink-soft);font-size:clamp(16px,2vw,18px);max-width:70ch}
p{margin:0 0 12px;max-width:74ch}
header.hero{padding:38px 0 8px}
section.viz{padding:18px 0 8px}
.figure{border:1px solid var(--line);border-radius:14px;background:var(--panel);
  padding:16px;margin:14px 0;overflow:hidden}
.figure svg{display:block;width:100%;height:auto}
.caption{font-size:12.5px;color:var(--muted);margin-top:8px}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px;color:var(--ink-soft);margin:6px 0 2px}
.legend .key{display:inline-flex;align-items:center;gap:6px}
.sw{width:12px;height:12px;border-radius:3px;display:inline-block;border:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.tag{font-size:12px;border:1px solid var(--line);border-radius:999px;padding:3px 10px;color:var(--ink-soft)}
.impact{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0 4px}
.impact .stat{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff}
.impact .big{font-size:24px;font-weight:800;letter-spacing:-.03em;line-height:1}
.impact .lbl{font-size:12.5px;color:var(--muted);margin-top:6px}
@media(max-width:720px){.impact{grid-template-columns:1fr}}
.trust{background:var(--tint);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:22px 0}
.trust h3{margin:0 0 6px;font-size:15px}
.note{font-size:12.5px;color:var(--muted)}
footer{border-top:1px solid var(--line);margin-top:40px;padding:24px 0;color:var(--muted);font-size:13px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:8px 0}
@media(max-width:720px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--line);border-radius:14px;background:var(--panel);padding:18px;
  text-decoration:none;color:inherit;display:block;transition:.15s}
.card:hover{border-color:var(--ink);transform:translateY(-2px)}
.card h3{margin:10px 0 6px;font-size:18px;letter-spacing:-.02em}
.card p{font-size:13.5px;color:var(--ink-soft);margin:0}
.thumb{height:120px;border-radius:10px;background:#fff;border:1px solid var(--line);overflow:hidden}
.thumb svg{width:100%;height:100%}
/* "propose a case study" invitation card — visibly the slot for more */
.card.cs-cta{border-style:dashed;background:transparent}
.card.cs-cta .thumb{background:var(--panel);border-style:dashed;display:flex;align-items:center;justify-content:center}
.card.cs-cta .thumb svg{width:auto;height:62px;opacity:.7}
.card.cs-cta:hover .thumb svg{opacity:1}