/* ============================================================
   Case study layout — shared by every page in site/work/
   Built from the original case-study.html design
   ============================================================ */

  /* progress bar */
  .progress{position:fixed;top:0;left:0;height:2px;width:100%;background:var(--accent);transform:scaleX(0);transform-origin:0 50%;z-index:200}

  /* case header */
  .case-head{padding:calc(var(--nav-h) + 60px) 40px 60px;border-bottom:1px solid var(--line)}
  .crumbs{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);margin-bottom:40px}
  .crumbs a{color:var(--muted);border-bottom:1px solid transparent;transition:border-color .2s}
  .crumbs a:hover{border-color:var(--muted)}
  .crumbs span{margin:0 10px}
  .case-head h1{font-family:'Inter Tight',sans-serif;font-size:clamp(56px,9vw,140px);letter-spacing:-0.04em;line-height:.9;font-weight:500;max-width:14ch}
  .case-head h1 em{font-style:normal;color:var(--muted);font-weight:300}
  .case-head .meta-row{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;margin-top:60px;padding-top:40px;border-top:1px solid var(--line)}
  .case-head .meta-row > div{display:flex;flex-direction:column;gap:6px}
  .case-head .meta-row .v{font-size:15px;font-weight:500}

  /* cover */
  .cover{padding:40px}
  .cover-img{aspect-ratio:16/8;border-radius:20px;background:linear-gradient(135deg,#eef0ff,#f4f3ef);position:relative;overflow:hidden}
  .cover-img::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,transparent 0 16px,rgba(0,0,0,.035) 16px 17px)}
  .cover-img .lbl{position:absolute;bottom:24px;left:28px;font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--muted);letter-spacing:0.08em;text-transform:uppercase}

  /* metrics strip */
  .m-strip{padding:80px 40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .m-strip .mcell{background:var(--bg);padding:32px 0 0 0;display:flex;flex-direction:column;gap:8px}
  .m-strip .mcell .big{font-family:'Inter Tight',sans-serif;font-size:clamp(48px,6vw,88px);letter-spacing:-0.035em;line-height:.95;font-weight:400}
  .m-strip .mcell .big .accent{color:var(--accent)}
  .m-strip .mcell .lbl{font-size:13px;color:var(--muted);line-height:1.45;max-width:28ch}

  /* body */
  .case-body{padding:120px 40px;display:grid;grid-template-columns:240px 1fr;gap:80px;align-items:start}
  .toc{position:sticky;top:100px;display:flex;flex-direction:column;gap:4px;padding-top:4px}
  .toc h6{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
  .toc a{font-size:13px;padding:8px 0;color:var(--muted);border-left:1px solid var(--line);padding-left:14px;transition:color .2s,border-color .2s}
  .toc a:hover,.toc a.on{color:var(--fg);border-color:var(--accent)}

  .chapters{display:flex;flex-direction:column;gap:100px;max-width:68ch}
  .chapter h2{font-family:'Inter Tight',sans-serif;font-size:clamp(32px,4vw,56px);letter-spacing:-0.03em;line-height:1;font-weight:500;margin-bottom:20px}
  .chapter .eyebrow{margin-bottom:8px}
  .chapter p{font-size:18px;line-height:1.6;margin-bottom:20px;color:var(--fg)}
  .chapter p.lede{font-family:'Inter Tight',sans-serif;font-size:24px;line-height:1.4;letter-spacing:-0.015em;color:var(--muted);font-weight:400;margin-bottom:32px}
  .chapter .pull{font-family:'Inter Tight',sans-serif;font-size:28px;line-height:1.3;letter-spacing:-0.02em;border-left:2px solid var(--accent);padding:8px 0 8px 24px;margin:32px 0;color:var(--fg)}
  .chapter ul{margin:20px 0;list-style:none}
  .chapter ul li{padding:12px 0;border-top:1px solid var(--line);font-size:16px;display:flex;gap:16px}
  .chapter ul li:last-child{border-bottom:1px solid var(--line)}
  .chapter ul li::before{content:"→";color:var(--accent);flex-shrink:0}
  .chapter .callout{background:var(--card);border-radius:14px;padding:28px 32px;margin:32px 0}
  .chapter .callout h5{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
  .chapter .callout p{font-size:16px;margin:0;line-height:1.55}

  /* image blocks */
  .shot{margin:40px 0;border-radius:14px;overflow:hidden;background:var(--card);position:relative;aspect-ratio:3/2}
  .shot::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,transparent 0 14px,rgba(0,0,0,.035) 14px 15px)}
  .shot .lbl{position:absolute;bottom:18px;left:22px;font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--muted);letter-spacing:0.08em;text-transform:uppercase}
  .shot-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:40px 0}
  .shot-grid .shot{margin:0;aspect-ratio:1}
  .shot.dark{background:#0f0f10}
  .shot.dark::before{background:repeating-linear-gradient(135deg,transparent 0 14px,rgba(255,255,255,.04) 14px 15px)}
  .shot.dark .lbl{color:rgba(255,255,255,.5)}

  /* next */
  .next{padding:80px 40px 40px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:40px}
  .next a{display:flex;flex-direction:column;gap:8px;padding:40px;border:1px solid var(--line);border-radius:16px;transition:background .3s,transform .4s var(--ease)}
  .next a:hover{background:var(--card);transform:translateY(-4px)}
  .next a .d{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted)}
  .next a h4{font-family:'Inter Tight',sans-serif;font-size:32px;letter-spacing:-0.02em;font-weight:500}
  .next a.prev{text-align:left}
  .next a.nxt{text-align:right;align-items:flex-end}

  @media (max-width:900px){
    .case-head{padding:calc(var(--nav-h) + 30px) 20px 40px}
    .case-head .meta-row{grid-template-columns:1fr 1fr;gap:16px;margin-top:30px;padding-top:24px}
    .cover{padding:20px}
    .cover-img{aspect-ratio:3/2}
    .m-strip{grid-template-columns:1fr 1fr;padding:40px 20px}
    .case-body{padding:60px 20px;grid-template-columns:1fr;gap:40px}
    .toc{position:static;flex-direction:row;overflow-x:auto;padding:0 0 16px}
    .toc h6{display:none}
    .toc a{border-left:none;border-bottom:1px solid var(--line);padding:6px 14px;white-space:nowrap}
    .chapters{gap:60px}
    .shot-grid{grid-template-columns:1fr}
    .next{grid-template-columns:1fr;padding:40px 20px}
  }

  /* case type label (Product / Design) */
  .case-type{display:inline-flex;align-items:center;gap:8px;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-wash);padding:6px 12px;border-radius:999px;margin-bottom:28px}
  .case-type::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}

  /* problem → decision → trade-off block inside "Decisions & trade-offs" */
  .chapter .decision{border-top:1px solid var(--line);padding:28px 0}
  .chapter .decision:last-of-type{border-bottom:1px solid var(--line);margin-bottom:20px}
  .chapter .decision h3{font-family:'Inter Tight',sans-serif;font-size:24px;letter-spacing:-0.015em;line-height:1.2;font-weight:500;margin-bottom:16px}
  .chapter .decision dl{display:grid;grid-template-columns:110px 1fr;gap:12px 20px}
  .chapter .decision dt{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--muted);padding-top:4px}
  .chapter .decision dd{font-size:16px;line-height:1.55}

  /* draft note — every .todo must be gone before a case study is published */
  .chapter .todo{border:1.5px dashed var(--accent);border-radius:14px;padding:20px 24px;margin:24px 0;background:var(--accent-wash);color:var(--accent-ink);font-size:15px;line-height:1.5}
  .chapter .todo b{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;display:block;margin-bottom:6px}

  .chapter .todo-inline{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.06em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-wash);border:1px dashed var(--accent);border-radius:6px;padding:2px 8px}

  @media (max-width:900px){
    .chapter .decision dl{grid-template-columns:1fr;gap:4px}
    .chapter .decision dd{margin-bottom:10px}
  }