/* Case study pages: the same Apple-style system as the homepage. Long-form, but every section is one idea. */
:root{
  --white:#ffffff; --gray:#f5f5f7; --black:#000000;
  --ink:#1d1d1f; --ink2:#6e6e73; --ink-dark:#f5f5f7; --ink2-dark:#a1a1a6;
  --blue:#0071e3; --link:#0066cc; --link-dark:#2997ff; --rule:#d2d2d7;
  --red:#d70015; --green:#248a3d;
  --font:-apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--white);color:var(--ink);font:400 17px/1.47 var(--font);letter-spacing:-.022em;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}
img{display:block;max-width:100%;height:auto}
code{font:500 .9em ui-monospace,"SF Mono",Menlo,monospace;letter-spacing:0;background:rgba(0,0,0,.05);padding:1px 5px;border-radius:5px}

.gn{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:rgba(251,251,253,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.gn-in{max-width:1024px;margin:0 auto;padding-inline:22px;height:44px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.gn-name{font-size:14px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.gn ul{list-style:none;margin:0;padding:0;display:flex;gap:30px}
.gn ul a{font-size:12px;color:var(--ink);opacity:.8}
.gn ul a[aria-current]{opacity:1;font-weight:600}
.gn ul a:hover{opacity:1;text-decoration:none}
/* Local nav, like Apple's product sub-nav */
.ln{border-bottom:1px solid rgba(0,0,0,.08);background:rgba(251,251,253,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);position:sticky;top:44px;z-index:9}
.ln-in{max-width:1024px;margin:0 auto;padding-inline:22px;height:52px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.ln-title{font-size:21px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.ln ul{list-style:none;margin:0;padding:0;display:flex;gap:22px;overflow-x:auto;scrollbar-width:none}
.ln ul::-webkit-scrollbar{display:none}
.ln ul a{font-size:12px;color:var(--ink);opacity:.8;white-space:nowrap}

.wrap{max-width:980px;margin:0 auto;padding-inline:22px}
.narrow{max-width:692px;margin:0 auto}
section{scroll-margin-top:110px}
.hero{text-align:center;padding:64px 22px 0;overflow:hidden}
.eyebrow{font-size:17px;font-weight:600;color:var(--ink2);margin:0 0 6px;letter-spacing:-.02em}
h1{font-size:80px;line-height:1.05;font-weight:600;letter-spacing:-.015em;margin:0}
.tag{font-size:28px;line-height:1.14;margin:10px 0 0;letter-spacing:.007em}
.meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));max-width:980px;margin:44px auto 0;text-align:left;border-top:1px solid var(--rule)}
.meta div{padding:18px 16px 0 0}
.meta b{display:block;font-size:12px;font-weight:600;color:var(--ink2);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
.meta span{font-size:15px;line-height:1.4;display:block}
.ctas{display:flex;justify-content:center;gap:14px;margin-top:22px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;font-size:17px;line-height:1.18;padding:11px 21px;border-radius:980px;border:1px solid var(--blue);color:var(--blue)}
.btn.fill{background:var(--blue);color:#fff}
.btn:hover{text-decoration:none;background:var(--blue);color:#fff}
.black .btn{border-color:var(--link-dark);color:var(--link-dark)}
.hero-img{max-width:1100px;margin:48px auto 0}
.shot{border-radius:14px;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,.06),0 30px 70px -24px rgba(0,0,0,.3);border:1px solid rgba(0,0,0,.06)}

.block{padding:110px 0}
.block.gray{background:var(--gray)}
.block.black{background:var(--black);color:var(--ink-dark)}
.kicker{font-size:21px;font-weight:600;color:var(--ink2);margin:0 0 8px}
.black .kicker{color:var(--ink2-dark)}
h2{font-size:56px;line-height:1.07;font-weight:600;letter-spacing:-.005em;margin:0;max-width:16ch;text-wrap:balance}
h2.c{margin-inline:auto;text-align:center}
.lead{font-size:24px;line-height:1.42;font-weight:500;letter-spacing:.005em;margin:28px 0 0;color:var(--ink2);max-width:36ch}
.lead strong{color:var(--ink);font-weight:600}
.black .lead{color:var(--ink2-dark)}
.black .lead strong{color:var(--ink-dark)}
.prose p{font-size:19px;line-height:1.53;margin:0 0 18px;color:var(--ink)}
.black .prose p{color:var(--ink-dark)}
.prose p.dim{color:var(--ink2)}

/* Two-column "what I owned" */
.cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:40px;margin-top:48px}
.cols h3{font-size:21px;font-weight:600;margin:0 0 12px;letter-spacing:.01em}
.cols ul{margin:0;padding:0;list-style:none}
.cols li{font-size:17px;padding:12px 0;border-top:1px solid var(--rule)}
.cols li span{color:var(--ink2)}
.note{margin-top:40px;background:var(--white);border-radius:18px;padding:22px 26px;font-size:17px;color:var(--ink2);max-width:692px}
.gray .note{background:var(--white)}
.note b{color:var(--ink);font-weight:600}

/* Flow diagram */
.flow{margin-top:56px;display:grid;gap:14px}
.lane{background:var(--white);border-radius:22px;padding:22px}
.gray .lane{background:var(--white)}
.black .lane{background:#1d1d1f}
.lane-h{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.lane-h b{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--ink2)}
.lane-h span{font-size:14px;color:var(--ink2)}
.black .lane-h b,.black .lane-h span{color:var(--ink2-dark)}
.nodes{display:flex;align-items:stretch;gap:0;flex-wrap:nowrap}
.node{flex:1 1 0;min-width:0;background:var(--gray);border-radius:14px;padding:14px 16px}
.black .node{background:#2c2c2e}
.node b{display:block;font-size:16px;font-weight:600;margin-bottom:2px}
.node span{display:block;font-size:14px;line-height:1.4;color:var(--ink2)}
.black .node span{color:var(--ink2-dark)}
.node.off{background:transparent;border:1.5px dashed var(--rule)}
.black .node.off{border-color:#48484a}
.arr{flex:none;width:30px;display:grid;place-items:center;color:var(--ink2);font-size:18px}
.wire{font-size:14px;color:var(--ink2);margin:10px 0 0;text-align:center}
.black .wire{color:var(--ink2-dark)}

/* Decision tiles */
.tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:56px}
.tile{background:var(--gray);border-radius:22px;padding:30px 30px 28px;display:flex;flex-direction:column}
.white-tiles .tile{background:var(--white)}
.black .tile{background:#1d1d1f}
.tile .q{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--ink2);margin:0 0 10px}
.black .tile .q{color:var(--ink2-dark)}
.tile h3{font-size:28px;line-height:1.14;font-weight:600;margin:0 0 12px;letter-spacing:.004em}
.tile p{margin:0 0 12px;font-size:17px;color:var(--ink2)}
.black .tile p{color:var(--ink2-dark)}
.tile p b{color:var(--ink);font-weight:600}
.black .tile p b{color:var(--ink-dark)}
.tile .cost{margin-top:auto;padding-top:14px;border-top:1px solid var(--rule);font-size:15px;color:var(--ink2)}
.black .tile .cost{border-color:#38383a;color:var(--ink2-dark)}
.tile .cost b{color:var(--ink);font-weight:600}
.black .tile .cost b{color:var(--ink-dark)}
.tile.wide{grid-column:span 2}

/* Big numbers */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin-top:64px}
.stat .n{font-size:64px;line-height:1;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .n small{font-size:28px;font-weight:600;margin-left:4px}
.stat p{margin:12px 0 0;font-size:17px;color:var(--ink2);max-width:28ch}
.black .stat p{color:var(--ink2-dark)}
.green{color:#30d158}

/* Failure list */
.fails{margin-top:56px;border-top:1px solid var(--rule)}
.black .fails{border-color:#38383a}
.fail{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:32px;padding:30px 0;border-bottom:1px solid var(--rule)}
.black .fail{border-color:#38383a}
.fail h3{font-size:24px;line-height:1.2;font-weight:600;margin:0;letter-spacing:.004em}
.fail .how{display:block;font-size:14px;font-weight:600;color:var(--ink2);margin-top:8px;text-transform:uppercase;letter-spacing:.04em}
.fail p{margin:0 0 10px;font-size:17px;color:var(--ink2)}
.fail p b{color:var(--ink);font-weight:600}
.black .fail p{color:var(--ink2-dark)}
.black .fail p b{color:var(--ink-dark)}

/* Timeline */
.tl{margin-top:56px;list-style:none;padding:0;display:grid;gap:0}
.tl li{display:grid;grid-template-columns:150px minmax(0,1fr);gap:24px;padding:20px 0;border-top:1px solid var(--rule)}
.tl time{font-size:15px;font-weight:600;color:var(--ink2);font-variant-numeric:tabular-nums}
.tl b{display:block;font-size:19px;font-weight:600}
.tl span{font-size:17px;color:var(--ink2)}
.tl li.bad b{color:var(--red)}
.tl li.good b{color:var(--green)}

/* Learned */
.learn{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:56px}
.learn div{background:var(--gray);border-radius:22px;padding:28px}
.learn h3{font-size:21px;font-weight:600;margin:0 0 10px}
.learn p{margin:0;font-size:17px;color:var(--ink2)}

.next{text-align:center;padding:96px 22px;background:var(--gray)}
.next p{font-size:17px;color:var(--ink2);margin:0 0 6px}
.next a.big{font-size:40px;font-weight:600;letter-spacing:-.005em;color:var(--ink)}
.next a.big:hover{color:var(--link);text-decoration:none}

.ph{background:#fff4ce;color:#7a5a00;font-size:13px;font-weight:600;padding:1px 6px;border-radius:4px;letter-spacing:0}
footer{background:var(--gray);color:var(--ink2);font-size:12px;line-height:1.33;letter-spacing:-.01em;border-top:1px solid var(--rule)}
.f-in{max-width:980px;margin:0 auto;padding:17px 22px 22px}
.notes{list-style:none;margin:0;padding:0 0 12px;border-bottom:1px solid var(--rule);counter-reset:n}
.notes li{counter-increment:n;padding-left:16px;position:relative;margin-bottom:8px}
.notes li::before{content:counter(n) ".";position:absolute;left:0}
.f-row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:12px}
.f-links a{padding:0 10px;border-left:1px solid var(--rule);color:var(--ink);opacity:.85}
.f-links a:first-child{padding-left:0;border-left:0}
sup a{font-size:.6em;color:inherit;opacity:.7}

/* Phones: the real-phone frame from the Even Up Instagram work, laid over a screenshot */
.phone{position:relative;aspect-ratio:820/1676}
.phone .scr{position:absolute;left:4.4098%;top:1.567%;width:91.1805%;height:96.8722%;object-fit:cover;border-radius:13.0858%/6.0262%;max-width:none}
.phone .frm{position:absolute;inset:0;width:100%;height:100%;max-width:none;pointer-events:none}
.phones{display:flex;justify-content:center;align-items:flex-end;gap:4%;max-width:860px;margin:56px auto 0}
.phones .phone{width:25%}
.phones .phone.mid{width:29%}

@media (max-width:1068px){
  h1{font-size:64px}h2{font-size:48px}.lead{font-size:21px}
  .stat .n{font-size:52px}
}
@media (max-width:734px){
  .gn ul{gap:18px}.gn ul li.hide-s{display:none}
  .ln-title{font-size:17px}
  h1{font-size:48px}.tag{font-size:21px}h2{font-size:32px}.lead{font-size:19px}.prose p{font-size:17px}
  .block{padding:72px 0}
  .meta{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cols,.tiles,.stats,.learn{grid-template-columns:minmax(0,1fr)}
  .tile.wide{grid-column:auto}
  .tile{padding:24px}
  .tile h3{font-size:22px}
  .nodes{flex-direction:column}
  .arr{width:auto;height:26px;transform:rotate(90deg)}
  .fail{grid-template-columns:minmax(0,1fr);gap:10px}
  .fail h3{font-size:21px}
  .tl li{grid-template-columns:minmax(0,1fr);gap:4px}
  .stat .n{font-size:48px}
  .next a.big{font-size:28px}
  .phones .phone{width:30%}.phones .phone.mid{width:34%}
}

/* Skip link: hidden until focused with the keyboard */
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:#fff;color:#1d1d1f;padding:8px 14px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.skip:focus{left:16px}