/* Case study previews: the open overview of each study, ending in the way
   into the full (password-protected) case study. Shared by preview-*.html. */

/* ---------- tokens (Atlas brand: sand, sage, lime, graphite) ---------- */
:root{
  --paper:#F4F2EC; --sand:#C4BFAF; --sage:#C3C7A2; --olive:#646938;
  --lime:#DFEC35; --ink:#414141; --graphite:#3A3A3A; --graphite-2:#2E2E2E;
  --ease:cubic-bezier(.2,.8,.2,1);
  --gut:clamp(16px,3vw,40px);
}
/* each study keeps the band it has on the landing page */
body.dark{--bg:#2E2E2E; --fg:#F4F2EC; --fg-2:#C4BFAF; --tile:#383838; --kick:var(--sage); --line:rgba(244,242,236,.25); --nav:rgba(46,46,46,.86)}
body.stone{--bg:#EBE8DF; --fg:#414141; --fg-2:#5A5A5A; --tile:#DFDBCF; --kick:var(--olive); --line:rgba(65,65,65,.2); --nav:rgba(235,232,223,.86)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--fg);font-family:'DM Sans',sans-serif;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.k{font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:.26em;text-transform:uppercase;line-height:1.5}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--lime);flex:0 0 8px}
.wrap{max-width:1600px;margin:0 auto;padding:0 var(--gut)}
.lock{width:15px;height:15px;flex:0 0 15px}
.lock rect{fill:currentColor}
.lock path{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round}

/* ---------- nav (mirrors the case study pages) ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px var(--gut);color:var(--fg);background:transparent;border-bottom:1px solid transparent;transition:background .6s,border-color .6s}
.nav[data-solid="1"]{background:var(--nav);border-bottom-color:rgba(128,128,128,.15);backdrop-filter:blur(22px) saturate(1.4);-webkit-backdrop-filter:blur(22px) saturate(1.4)}
.nav .brand{display:flex;align-items:center;gap:12px;padding:6px 0}
.nav .brand img{height:30px;width:auto}
body.dark .nav .brand img{filter:invert(1) brightness(1.15)}
.nav .bt{display:flex;flex-direction:column;gap:3px}
.nav .bt b{font-size:20px;font-weight:500;letter-spacing:-.02em;line-height:1}
.nav .bt span{font-family:'Space Grotesk',sans-serif;font-size:9px;letter-spacing:.32em;text-transform:uppercase;line-height:1}
.nav .mid{display:flex;align-items:center;gap:10px;opacity:.75}
.nav .right{display:flex;align-items:center;gap:8px}
.pill{font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:0 18px;min-height:44px;display:inline-flex;align-items:center;gap:8px;border:1px solid currentColor;border-radius:999px;white-space:nowrap;transition:background .3s,color .3s,border-color .3s,opacity .3s}
.pill:hover{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.pill.ghost{border-color:transparent;opacity:.75}
.pill.ghost:hover{opacity:1}

.nav .left{display:flex;align-items:center;gap:clamp(12px,2vw,24px)}
.nav .back{display:inline-flex;align-items:center;min-height:44px;font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;opacity:.75;transition:opacity .3s}
.nav .back::before{content:"";width:1px;height:22px;background:currentColor;opacity:.35;margin-right:clamp(12px,2vw,24px)}
.nav .back:hover{opacity:1}
@media (max-width:420px){.nav .bt{display:none}}

.nav .lang{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.08em;text-transform:uppercase;opacity:.75;transition:opacity .3s}
.nav .lang:hover{opacity:1}
@media (max-width:420px){.nav .lang{padding:0 6px}.nav .back{font-size:11px}.nav .right .pill{padding:0 12px;font-size:11px}}

/* ---------- head ---------- */
.pv-head{padding-top:clamp(128px,20vh,200px)}
.pv-head .kick{display:flex;align-items:center;gap:12px;color:var(--kick)}
.pv-head .title{display:flex;flex-wrap:wrap;align-items:baseline;gap:16px 32px;margin-top:24px}
.pv-head h1{font-size:clamp(48px,7vw,112px);line-height:.96;letter-spacing:-.04em;font-weight:400;margin:0}
.pv-head .loc{font-size:13px;letter-spacing:.28em;color:var(--fg-2)}
.pv-head .lede{font-size:clamp(20px,2vw,28px);line-height:1.25;letter-spacing:-.02em;margin:28px 0 0;max-width:34ch;text-wrap:balance}
.rise{animation:rise 1.2s .2s both}
.rise.d2{animation-delay:.35s}.rise.d3{animation-delay:.5s}
@keyframes rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}

/* ---------- body: viewer, figures, columns, result ---------- */
.pv-body{padding:clamp(48px,7vh,80px) 0 clamp(96px,14vh,160px)}
.viewer{position:relative;aspect-ratio:var(--ar,21/9);overflow:hidden;background:var(--tile)}
.viewer img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s ease}
.viewer img.on{opacity:1}
.viewer .tag{position:absolute;left:12px;top:12px;z-index:2;display:flex;align-items:center;gap:8px;padding:7px 11px;background:rgba(46,46,46,.72);color:var(--paper);font-family:'Space Grotesk',sans-serif;font-size:10px;letter-spacing:.22em;text-transform:uppercase;line-height:1;pointer-events:none}
.viewer .tag .dot{width:5px;height:5px;flex-basis:5px}
.arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:52px;height:52px;border-radius:50%;border:0;background:rgba(46,46,46,.82);color:var(--paper);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .3s,color .3s}
.arrow:hover{background:var(--lime);color:var(--ink)}
.arrow.prev{left:16px}.arrow.next{right:16px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:2px;margin-top:2px}
.stats>div{background:var(--tile);padding:28px 24px}
.stats b{display:block;font-weight:400;font-size:clamp(24px,3vw,44px);letter-spacing:-.03em;line-height:1;white-space:nowrap}
.stats .k{color:var(--kick);margin-top:12px}
.stats>.hl{background:var(--lime);color:var(--ink)}
.stats>.hl .k{color:var(--ink)}
.note{margin:16px 0 0;font-size:13px;line-height:1.5;color:var(--fg-2);max-width:760px;font-style:italic}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:40px 56px;align-items:start;margin-top:72px}
.cols>div{display:flex;flex-direction:column;gap:16px;padding-top:20px;border-top:1px solid var(--line)}
.cols .k{display:flex;gap:12px;font-size:12px;letter-spacing:.28em;color:var(--kick)}
.cols p{margin:0;font-size:17px;line-height:1.6;color:var(--fg-2);max-width:440px;text-wrap:pretty}
.result{margin-top:clamp(64px,9vh,112px);padding-top:clamp(32px,4vw,48px);border-top:1px solid var(--line);display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:32px clamp(40px,6vw,96px);align-items:end}
.result-line{margin:0;font-size:clamp(30px,3.6vw,56px);line-height:1.06;letter-spacing:-.03em;text-wrap:balance}
body.dark .result-line em{font-style:normal;color:var(--lime)}
body.stone .result-line em{font-style:normal;box-shadow:inset 0 -.2em 0 var(--lime)}
.result-side{display:flex;flex-direction:column;gap:24px}
.result-side p{margin:0;font-size:17px;line-height:1.6;color:var(--fg-2);text-wrap:pretty}
.result-side strong{font-weight:500;color:var(--fg)}
.status{display:flex;align-items:flex-start;gap:12px;padding-top:18px;border-top:1px solid var(--line)}
.status .dot{margin-top:5px}
body.stone .status .dot{box-shadow:0 0 0 1px rgba(65,65,65,.45)}
.status span.t{display:flex;flex-direction:column;gap:6px}
.status .k{color:var(--fg-2);font-size:11px;letter-spacing:.24em}
.status .v{font-size:16px;line-height:1.4}

/* ---------- the way into the full study ---------- */
.locked{background:var(--lime);color:var(--ink);padding:clamp(72px,11vh,128px) 0}
.locked .wrap{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:40px clamp(40px,6vw,96px);align-items:end}
.locked .k{display:flex;align-items:center;gap:12px}
.locked .k .lock{width:13px;height:13px;flex-basis:13px}
.locked h2{font-size:clamp(36px,4.8vw,76px);line-height:.98;letter-spacing:-.04em;font-weight:400;margin:24px 0 0;max-width:15ch;text-wrap:balance}
.locked-text p{margin:24px 0 0;font-size:18px;line-height:1.55;max-width:44ch}
.locked-cta{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.lock-btn{display:inline-flex;align-items:center;gap:14px;min-height:72px;padding:0 36px;border-radius:999px;background:var(--graphite);color:var(--paper);font-size:clamp(18px,1.6vw,22px);font-weight:500;transition:background .3s,transform .3s var(--ease)}
.lock-btn:hover{background:var(--ink);transform:translateY(-2px)}
.locked-cta p{margin:0;font-size:15px;line-height:1.55}
.locked-cta p a{text-decoration:underline;text-underline-offset:4px}

/* ---------- foot ---------- */
.pv-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px 24px;padding-top:40px;padding-bottom:28px}
.pv-foot .next{font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:.1em;text-transform:uppercase;padding:0 22px;min-height:48px;display:inline-flex;align-items:center;border:1px solid var(--fg);border-radius:999px;transition:background .3s,color .3s,border-color .3s}
.pv-foot .next:hover{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.pv-foot .all{font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:.1em;text-transform:uppercase;padding:0 22px;min-height:48px;display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;transition:background .3s,color .3s,border-color .3s}
.pv-foot .all:hover{border-color:var(--fg)}
.colophon{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding-bottom:36px;color:var(--fg-2)}
.colophon b{font-weight:500;color:var(--fg);letter-spacing:.2em}

/* reveal */
[data-r]{opacity:0;transform:translateY(22px);transition:opacity 1s var(--ease),transform 1.1s var(--ease)}
[data-r].in{opacity:1;transform:none}
[data-r="2"]{transition-delay:.12s}[data-r="3"]{transition-delay:.24s}

/* ---------- responsive ---------- */
@media (max-width:1100px){.nav .mid{display:none}}
@media (max-width:900px){.result,.locked .wrap{grid-template-columns:minmax(0,1fr);align-items:start}}
@media (max-width:720px){
  .nav .pill.ghost{display:none}
  .nav .long{display:none}
  .viewer{aspect-ratio:4/3}
  .lock-btn{width:100%;justify-content:center;padding:0 24px}
}
@media (min-width:721px){.nav .short{display:none}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  [data-r]{opacity:1;transform:none}
}

/* request button: floats bottom right at every width, tinted like the solid nav */
.fab{position:fixed;right:var(--gut);bottom:calc(clamp(16px,3vw,32px) + env(safe-area-inset-bottom));z-index:39;display:inline-flex;align-items:center;gap:10px;min-height:52px;padding:0 24px;font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;border:1px solid rgba(128,128,128,.25);border-radius:999px;background:var(--nav);color:var(--fg);backdrop-filter:blur(22px) saturate(1.4);-webkit-backdrop-filter:blur(22px) saturate(1.4);box-shadow:0 8px 24px rgba(0,0,0,.12);transition:background .3s,color .3s,border-color .3s}
.fab::before{content:"";width:6px;height:6px;border-radius:50%;background:#DFEC35;flex:0 0 6px}
.fab:hover{background:#DFEC35;color:#414141;border-color:#DFEC35}
@media (max-width:720px){.fab{font-size:12px;padding:0 20px;min-height:48px}}
/* nav: a little shorter; slides away while scrolling down, back on the way up */
.nav{padding-top:6px;padding-bottom:6px;transition:background .6s,color .6s,border-color .6s,transform .5s cubic-bezier(.2,.8,.2,1)}
.nav[data-hide="1"]{transform:translateY(-110%)}