/* ==========================================================
   Case study layout (utility/citya, sports-venue, flying-money)
   Markup: <section class="section cs"> · behaviour: js/case-study.js
   ========================================================== */
.cs{--cs-ink:#160e08;--cs-gray:#6b6661;--cs-green:#5aa598;--cs-line:#e9e7e3;--cs-soft:#f6f5f2;padding-top:5rem;padding-bottom:2rem;color:var(--cs-ink)}
.cs *{box-sizing:border-box}
.cs-wrap{max-width:1360px;margin:0 auto}
.cs p{font-size:1.125rem;font-weight:400;line-height:1.6;color:var(--cs-gray);margin:0 0 1rem}
.cs p:last-child{margin-bottom:0}
.cs strong{color:var(--cs-ink);font-weight:600}
.cs h2{font-size:clamp(2rem,3.6vw,3rem);line-height:1.1;letter-spacing:-.03em;font-weight:400;margin:0 0 1.25rem}
.cs h3{font-size:1.5rem;line-height:1.25;font-weight:500;letter-spacing:-.01em;margin:0 0 .75rem}
.cs h4{font-size:1rem;line-height:1.3;font-weight:600;margin:0 0 .4rem}
.cs ul,.cs ol{margin:0 0 1rem;padding-left:1.2rem;color:var(--cs-gray);font-size:1.125rem;line-height:1.6}
.cs li{margin-bottom:.35rem}
.cs li::marker{color:var(--cs-green)}

/* at a glance */
.cs-glance{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--cs-line);border-bottom:1px solid var(--cs-line)}
.cs-glance>div{padding:1.5rem 1.5rem 1.5rem 0}
.cs-glance>div+div{padding-left:1.5rem;border-left:1px solid var(--cs-line)}
.cs-k{display:block;font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--cs-green);margin-bottom:.5rem}
.cs-glance p{font-size:1.05rem;color:var(--cs-ink);line-height:1.45}

/* summary cards */
.cs-tldr{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:3rem}
.cs-card{background:var(--cs-soft);border-radius:24px;padding:2rem}
.cs-card.dark{background:var(--cs-ink)}
.cs-card.dark h3,.cs-card.dark strong{color:#fff}.cs-card.dark p,.cs-card.dark li{color:rgba(255,255,255,.72)}
.cs-card h3{font-size:1.35rem}
.cs-card p,.cs-card li{font-size:1.05rem}

/* sections */
.cs-sec{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:2rem;padding:5rem 0;border-top:1px solid var(--cs-line);margin-top:5rem}
.cs-sec+.cs-sec{margin-top:0}
.cs-label{position:sticky;top:7rem;align-self:start}
.cs-label .n{display:block;font-size:.8rem;font-weight:600;letter-spacing:.08em;color:var(--cs-green);margin-bottom:.5rem}
.cs-label .t{font-size:1.15rem;font-weight:500;line-height:1.3}
.cs-body>.lead{font-size:1.35rem;line-height:1.5;color:var(--cs-ink);max-width:46rem}
.cs-body>p,.cs-body>ul,.cs-body>ol{max-width:46rem}
.cs-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:2rem 0}
.cs-cols.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.cs-cols.four{grid-template-columns:repeat(4,minmax(0,1fr))}

/* process steps */
.cs-steps{display:grid;grid-template-columns:repeat(var(--n,4),minmax(0,1fr));gap:1rem;margin:2rem 0;counter-reset:st}
.cs-step{border-top:2px solid var(--cs-ink);padding-top:1rem;counter-increment:st}
.cs-step::before{content:"0" counter(st);display:block;font-size:.8rem;font-weight:600;letter-spacing:.08em;color:var(--cs-green);margin-bottom:.5rem}
.cs-step p{font-size:1rem}

/* figures */
.cs-fig{margin:2rem 0 0}
.cs-fig .frame{display:block;width:100%;padding:0;border:1px solid var(--cs-line);border-radius:24px;overflow:hidden;background:var(--cs-soft);cursor:zoom-in;position:relative}
.cs-fig .frame img{display:block;width:100%;height:auto}
.cs-fig .frame.pad{padding:1.5rem}
.cs-fig .frame.pad img{border-radius:10px}
.cs-fig .frame::after{content:"Click to enlarge";position:absolute;right:14px;bottom:14px;background:rgba(22,14,8,.78);color:#fff;font-size:.75rem;font-weight:500;padding:6px 10px;border-radius:999px;opacity:0;transition:opacity .2s}
.cs-fig .frame:hover::after,.cs-fig .frame:focus-visible::after{opacity:1}
.cs-fig figcaption{text-align:left;font-size:.95rem;color:var(--cs-gray);margin-top:.75rem;line-height:1.5}
.cs-figs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.cs-figs.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.cs-tag{display:inline-block;font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:5px 10px;border-radius:999px;margin-bottom:.75rem}
.cs-tag.before{background:#ecebe8;color:#57524d}.cs-tag.after{background:var(--cs-green);color:#fff}

/* decisions */
.cs-dec{border:1px solid var(--cs-line);border-radius:28px;padding:2.5rem;margin-top:1.5rem;background:#fff}
.cs-dec>.num{font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--cs-green);margin-bottom:.75rem}
.cs-dec h3{font-size:1.75rem;max-width:40rem}
.cs-why{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;margin-top:1.5rem}
.cs-dec .cs-fig,.cs-dec .cs-figs{margin-top:2rem}.cs-dec .cs-figs .cs-fig{margin-top:0}
.cs-why>div{border-top:1px solid var(--cs-line);padding-top:1rem}
.cs-why p,.cs-why li{font-size:1rem;line-height:1.55}
.cs-why ul{padding-left:1.1rem;font-size:1rem;margin:0}

/* before / after slider */
.cs-ba{position:relative;margin:2rem auto 0;max-width:640px;border:1px solid var(--cs-line);border-radius:24px;overflow:hidden;background:#fff;user-select:none;touch-action:pan-y;--p:50%}
.cs-ba img{display:block;width:100%;height:auto;pointer-events:none}
.cs-ba .top{position:absolute;inset:0;background:#fff;clip-path:inset(0 calc(100% - var(--p)) 0 0)}
.cs-ba .top img{height:100%;object-fit:cover;object-position:top left}
.cs-ba .bar{position:absolute;top:0;bottom:0;left:var(--p);width:2px;margin-left:-1px;background:var(--cs-ink)}
.cs-ba .knob{position:absolute;top:50%;left:var(--p);width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;background:var(--cs-ink);color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:0 6px 18px rgba(0,0,0,.25)}
.cs-ba input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.cs-ba .l{position:absolute;top:14px;z-index:2;margin:0}
.cs-ba .l.b{left:14px}.cs-ba .l.a{right:14px}

/* phone flow strip */
.cs-flow{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(128px,1fr);gap:1rem;overflow-x:auto;padding:2rem;margin-top:2rem;border-radius:24px;background:linear-gradient(135deg,#6a72cf,#5b5fb3);scroll-snap-type:x proximity}
.cs-flow .ph{scroll-snap-align:start}
.cs-flow .ph .dev{background:#0f0f12;border-radius:26px;padding:6px;box-shadow:0 20px 40px -18px rgba(10,8,40,.6)}
.cs-flow .ph img{display:block;width:100%;border-radius:20px}
.cs-flow .ph b{display:block;color:#fff;font-size:.95rem;font-weight:600;margin:.9rem 0 .25rem}
.cs-flow .ph span{display:block;color:rgba(255,255,255,.78);font-size:.85rem;line-height:1.45}
.cs-flow .ph i{font-style:normal;display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#fff;color:#4b54c4;font-size:.75rem;font-weight:700;margin-right:6px}

/* now / next / later */
.cs-prio{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin:2rem 0}
.cs-prio>div{border-radius:20px;padding:1.5rem;background:var(--cs-soft)}
.cs-prio>div:first-child{background:var(--cs-green)}
.cs-prio>div:first-child h4,.cs-prio>div:first-child li{color:#fff}
.cs-prio>div:first-child li::marker{color:#fff}
.cs-prio h4{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.75rem}
.cs-prio ul{margin:0;font-size:1.05rem}

/* quote-style hypothesis */
.cs-hyp{display:grid;grid-template-columns:minmax(0,1fr) 28px minmax(0,1fr);gap:1rem;align-items:center;padding:1.25rem 0;border-top:1px solid var(--cs-line)}
.cs-hyp:last-of-type{border-bottom:1px solid var(--cs-line)}
.cs-hyp .q{background:#efe6f5;border-radius:14px;padding:1rem 1.1rem;font-size:1rem;line-height:1.45;color:#4a2f5e}
.cs-hyp .q small{display:block;font-size:.72rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;opacity:.7;margin-bottom:.3rem}
.cs-hyp .ar{color:var(--cs-green);font-size:1.3rem;text-align:center}
.cs-hyp p{font-size:1rem;margin:0}

/* preview-only notes */
.cs-todo{background:#fff6cc;border:1.5px dashed #d1a800;border-radius:14px;padding:1rem 1.2rem;margin:1.5rem 0 0;max-width:46rem}
.cs-todo p,.cs-todo li{font-size:.98rem!important;color:#5c4a00!important;line-height:1.5}
.cs-todo b{display:block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:#8a6d00;margin-bottom:.35rem}
.cs-banner{position:relative;z-index:2;background:#fff6cc;border-bottom:1.5px dashed #d1a800;color:#5c4a00;font:500 .9rem/1.4 Raleway,sans-serif;padding:.6rem 1rem;text-align:center}

/* lightbox */
.cs-lb{position:fixed;inset:0;z-index:99999;background:rgba(15,10,6,.92);display:none;overflow:auto;cursor:zoom-out;padding:3vh 3vw}
.cs-lb.open{display:block}
.cs-lb img{display:block;margin:0 auto;max-width:none;width:min(94vw,2400px);height:auto;border-radius:12px;background:#fff}
.cs-lb button{position:fixed;top:16px;right:16px;width:44px;height:44px;border-radius:50%;border:0;background:#fff;color:#160e08;font-size:20px;cursor:pointer}

@media (max-width:991px){
  .cs-sec{grid-template-columns:minmax(0,1fr);gap:1.25rem;padding:3.5rem 0;margin-top:3.5rem}
  .cs-label{position:static}
  .cs-glance{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cs-glance>div:nth-child(3){border-left:0;padding-left:0}
  .cs-glance>div:nth-child(n+3){border-top:1px solid var(--cs-line)}
  .cs-tldr,.cs-why,.cs-prio,.cs-cols.three,.cs-cols.four{grid-template-columns:1fr}
  .cs-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:600px){
  .cs{padding-top:3rem}
  .cs p,.cs ul,.cs ol{font-size:1.05rem}
  .cs-body>.lead{font-size:1.2rem}
  .cs-glance{grid-template-columns:1fr}
  .cs-glance>div+div{border-left:0;padding-left:0;border-top:1px solid var(--cs-line)}
  .cs-cols,.cs-figs,.cs-figs.three,.cs-steps{grid-template-columns:1fr}
  .cs-dec{padding:1.5rem;border-radius:22px}
  .cs-dec h3{font-size:1.4rem}
  .cs-card{padding:1.5rem}
  .cs-hyp{grid-template-columns:1fr}
  .cs-hyp .ar{transform:rotate(90deg)}
  .cs-flow{padding:1.25rem;grid-auto-columns:62%}
  .cs-fig .frame.pad{padding:.75rem}
}

/* browser mockup */
.cs-browser .frame{background:#fff;box-shadow:0 30px 60px -40px rgba(22,14,8,.35)}
.cs-browser .chrome{display:flex;align-items:center;gap:7px;height:38px;padding:0 16px;background:#f1f0ed;border-bottom:1px solid var(--cs-line)}
.cs-browser .chrome i{width:10px;height:10px;border-radius:50%;background:#d9d6d0}
.cs-browser .chrome em{margin-left:14px;height:18px;flex:0 1 46%;border-radius:9px;background:#e3e0da}
.cs-browser .bview{display:block;overflow:hidden}
.cs-browser .bview img{display:block;width:100%}
/* interview quotes */
.cs-quote{margin:0;padding:1.75rem;border-radius:20px;background:var(--cs-soft);border:0;border-left:4px solid var(--cs-green)}
.cs-quote p{font-size:1.1rem!important;color:var(--cs-ink)!important;line-height:1.55;margin:0 0 .9rem!important}
.cs-quote cite{font-style:normal;font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--cs-green)}
.cs-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:.9rem 0 0}
.cs-chips span{font-size:.78rem;font-weight:600;padding:5px 11px;border-radius:999px;background:#e8f2ef;color:#2f6f63}
.cs-ba{max-width:880px}
.cs-zoom{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:2rem}
.cs-zoom .cs-fig{margin:0}
@media (max-width:600px){.cs-zoom{grid-template-columns:1fr}.cs-browser .chrome{height:28px}}

/* research quotes */
.cs-quotes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:2rem 0}
.cs .cs-quote{margin:0;padding:1.75rem 2rem;border:0;border-left:4px solid var(--cs-green);border-radius:0 20px 20px 0;background:var(--cs-soft);font-size:inherit;line-height:inherit}
.cs .cs-quote p{font-size:1.2rem;line-height:1.5;color:var(--cs-ink);margin:0 0 .9rem}
.cs .cs-quote cite{font-style:normal;font-size:.8rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--cs-green)}
.cs-link{display:block;font-size:.9rem;color:var(--cs-gray);margin-top:.75rem}
.cs-link b{color:var(--cs-ink);font-weight:600}
.cs-evid{margin-top:1.5rem;padding:1rem 1.25rem;border-radius:14px;background:#eef6f4;font-size:1rem;line-height:1.5;color:#2f5d54}
.cs-evid b{font-weight:600}
.cs-ba.wide{max-width:none}
.cs-tall .frame{max-height:720px;overflow:hidden}
.cs-tall .frame::before{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(rgba(255,255,255,0),#fff);pointer-events:none}
@media (max-width:600px){.cs-quotes{grid-template-columns:1fr}.cs .cs-quote{padding:1.25rem 1.4rem}.cs .cs-quote p{font-size:1.08rem}}

.image-wrapper.start .cs-hero-img{width:100%;height:100%;object-fit:cover;object-position:center}