/* Case-study pages — same tokens and type as index.html */
:root{
  --biro:#1D3FC4;
  --biro-muted:#4A64CF;
  --biro-line:rgba(29,63,196,.16);
  --biro-tint:rgba(29,63,196,.05);
  --gold:#D4AF37;
  --gold-light:#E8C45A;
  --white:#FFFFFF;
  --w-muted:rgba(255,255,255,.82);
  --w-line:rgba(255,255,255,.2);
  --w-tint:rgba(255,255,255,.07);
  --font:"Manrope",system-ui,-apple-system,sans-serif;
  --gutter:clamp(16px,4vw,56px);
  --max:1240px;
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{background:var(--white);color:var(--biro);font-family:var(--font);font-size:17px;line-height:1.7;overflow-x:clip;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--biro);outline-offset:3px}
.on-blue :focus-visible,.site-header :focus-visible,footer :focus-visible{outline-color:var(--gold-light)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
section{position:relative;padding:clamp(72px,9vw,128px) 0}
.on-white{background:var(--white);color:var(--biro)}
.on-blue{background:var(--biro);color:var(--white)}
.muted,.lede{color:var(--biro-muted)}
.on-blue .muted,.on-blue .lede{color:var(--w-muted)}

/* type */
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--biro)}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--gold)}
.on-blue .eyebrow{color:var(--gold-light)}
.h2{font-weight:600;font-size:clamp(32px,4.4vw,56px);line-height:1.05;letter-spacing:-.035em;margin-top:16px}
.h2 .dot{color:var(--gold)}
.on-blue .h2 .dot{color:var(--gold-light)}
.h3{font-weight:600;font-size:21px;line-height:1.25;letter-spacing:-.015em}
.lede{font-size:clamp(17px,1.45vw,19px);max-width:56ch}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 30px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;transition:background .25s,color .25s,transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--biro);color:var(--white)}
.btn-primary:hover{background:var(--gold);color:var(--biro)}
.on-blue .btn-primary,.site-header .btn-primary{background:var(--gold-light);color:var(--biro)}
.on-blue .btn-primary:hover,.site-header .btn-primary:hover{background:var(--white)}
.btn-ghost{box-shadow:inset 0 0 0 1px currentColor}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px var(--gold-light);color:var(--gold-light)}
.arrow{display:inline-block;transition:transform .25s}
a:hover .arrow{transform:translateX(4px)}
a:hover .arrow.back{transform:translateX(-4px)}

/* header */
.site-header{position:fixed;inset:0 0 auto;z-index:50;background:var(--biro);color:var(--white);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 1px 0 var(--w-line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:80px;gap:16px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.03em;line-height:1}
.logo b{color:var(--gold-light);font-weight:800}
.nav-right{display:flex;align-items:center;gap:24px}
.nav-back{font-size:14px;font-weight:500;color:var(--w-muted);transition:color .2s}
.nav-back:hover{color:var(--white)}
.nav-cta{min-height:44px;padding:0 22px;font-size:14px}
@media(max-width:520px){.nav-back{display:none}.logo{font-size:18px}}

/* hero — same faint blueprint grid as the home hero */
.cs-hero{padding:150px 0 clamp(64px,8vw,104px);isolation:isolate}
.cs-hero::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.09;
  background:
    radial-gradient(circle,var(--white) 1.2px,transparent 1.6px) 0 0/56px 56px,
    linear-gradient(var(--white) 1px,transparent 1px) -.5px -.5px/56px 56px,
    linear-gradient(90deg,var(--white) 1px,transparent 1px) -.5px -.5px/56px 56px;
  -webkit-mask-image:radial-gradient(120% 90% at 70% 30%,#000 25%,transparent 80%);
  mask-image:radial-gradient(120% 90% at 70% 30%,#000 25%,transparent 80%)}
.crumb{display:inline-flex;gap:8px;font-size:14px;font-weight:600;color:var(--w-muted);margin-bottom:36px}
.crumb:hover{color:var(--gold-light)}
.cs-hero h1{font-weight:600;font-size:clamp(44px,7vw,96px);line-height:1;letter-spacing:-.045em;margin:18px 0 24px;max-width:14ch}
.cs-hero h1 .gold{color:var(--gold-light)}
.meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:0 32px;margin-top:48px;border-top:1px solid var(--w-line)}
.meta div{padding:18px 0;border-bottom:1px solid var(--w-line)}
.meta dt{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-light);margin-bottom:4px}
.meta dd{font-size:16px;font-weight:500}
.meta a{border-bottom:2px solid var(--gold-light)}
.meta a:hover{color:var(--gold-light)}

/* browser-frame screenshot */
.frame{border-radius:calc(var(--radius) + 2px);overflow:hidden;background:var(--white);border:1px solid var(--biro-line);box-shadow:0 30px 70px rgba(29,63,196,.16)}
.frame-bar{display:flex;align-items:center;gap:7px;height:36px;padding:0 14px;background:#F3F5FC;border-bottom:1px solid var(--biro-line)}
.frame-bar i{width:10px;height:10px;border-radius:50%;background:var(--biro-line)}
.frame-bar span{margin-left:12px;font-size:12px;font-weight:600;color:var(--biro-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.frame img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;object-position:top}
.lead-shot{margin-top:calc(-1 * clamp(40px,6vw,80px));position:relative;z-index:2}
.lead-shot-bg{background:linear-gradient(var(--biro) 50%,var(--white) 50%);padding:0}

/* breakdown */
.split{display:grid;gap:28px 80px}
@media(min-width:960px){.split{grid-template-columns:.8fr 1.2fr}}
.split + .split{margin-top:clamp(64px,8vw,104px);padding-top:clamp(64px,8vw,104px);border-top:1px solid var(--biro-line)}
.prose p+p{margin-top:16px}
.prose p{color:var(--biro-muted)}
.prose p strong{color:var(--biro);font-weight:600}
.features{display:grid;gap:0 40px}
@media(min-width:700px){.features{grid-template-columns:1fr 1fr}}
.feature{position:relative;padding:24px 0 22px;border-top:1px solid var(--biro-line)}
.feature::before{content:"";position:absolute;top:-1px;left:0;width:36px;height:2px;background:var(--gold)}
.feature .h3{margin-bottom:6px}
.feature p{font-size:16px;color:var(--biro-muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{padding:8px 16px;font-size:14px;font-weight:500;border-radius:999px;box-shadow:inset 0 0 0 1px var(--biro-line)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}
.stat{padding:22px;border-radius:var(--radius);background:var(--biro-tint);border:1px solid var(--biro-line)}
.stat b{display:block;font-size:clamp(30px,3.4vw,42px);font-weight:700;letter-spacing:-.035em;line-height:1.1}
.stat span{font-size:14px;color:var(--biro-muted)}

/* screens gallery */
.sec-head{display:grid;gap:20px;margin-bottom:clamp(40px,5vw,64px)}
@media(min-width:960px){.sec-head{grid-template-columns:1.2fr 1fr;align-items:end;gap:80px}}
.screens{display:grid;gap:clamp(20px,2.5vw,32px)}
@media(min-width:800px){.screens{grid-template-columns:1fr 1fr}.screens .wide{grid-column:1/-1}}
.screens figcaption{margin-top:12px;font-size:15px;display:flex;justify-content:space-between;gap:12px}
.screens figcaption strong{font-weight:600}
.screens figcaption span{color:var(--biro-muted);font-size:14px}
.ph{position:relative;display:grid;place-items:center;aspect-ratio:16/10;background:var(--biro-tint)}
.ph-label{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--biro-muted);text-align:center;padding:8px 14px}
.frame.mobile{max-width:300px;margin:0 auto;border-radius:28px}
.frame.mobile .ph{aspect-ratio:9/19.5}

/* next project + cta */
.next{display:grid;gap:24px;align-items:center;padding:clamp(24px,3vw,40px);border-radius:calc(var(--radius) + 10px);border:1px solid var(--w-line);background:var(--w-tint);transition:background .3s}
.next:hover{background:rgba(255,255,255,.12)}
@media(min-width:800px){.next{grid-template-columns:1fr 1.1fr;gap:56px}}
.next img{border-radius:var(--radius);height:auto;aspect-ratio:16/10;object-fit:cover;object-position:top;width:100%}
.next .h2{font-size:clamp(30px,3.6vw,46px)}
.next .go{display:inline-flex;gap:8px;margin-top:18px;font-weight:600;color:var(--gold-light)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}

footer{background:var(--biro);color:var(--white);padding:40px 0;border-top:1px solid var(--w-line)}
.foot{display:flex;flex-wrap:wrap;gap:20px 40px;justify-content:space-between;align-items:center}
.foot nav{display:flex;flex-wrap:wrap;gap:16px 28px}
.foot nav a,.foot small{font-size:14px;color:var(--w-muted)}
.foot nav a:hover{color:var(--gold-light)}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* phone-sized screenshot */
.frame.mobile img{aspect-ratio:9/16;object-fit:cover;object-position:top}
.mobile-row figcaption{max-width:300px;margin-left:auto;margin-right:auto}