/* UX case study pages — same system as v2.html: 760px column, dashed edges, striped section bands, serif + mono */
:root{
  --bg:#fcfcfb;--card:#ffffff;--fg:#18181b;--muted:#52525b;--soft:#71717a;
  --line:rgba(0,0,0,.1);--chip:#f4f4f5;--hover:rgba(0,0,0,.025);--stripe:rgba(0,0,0,.07);
  --sel:#0d99ff;--claude:#d97757;--green:#10b981;--amber:#d97706;--rose:#f43f5e;
  --serif:'Instrument Serif',Georgia,serif;--sans:'Inter',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
  --w:760px;
}
:root[data-theme="dark"]{
  --bg:#0a0a0a;--card:#101010;--fg:#f5f5f4;--muted:#a1a1aa;--soft:#8b8b94;
  --line:rgba(255,255,255,.1);--chip:#141414;--hover:rgba(255,255,255,.03);--stripe:rgba(255,255,255,.06);--amber:#f59e0b;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-padding-top:76px}
html.smooth{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background-color .3s,color .3s}
::selection{background:var(--fg);color:var(--bg)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,video{display:block;max-width:100%}
svg.i{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* column + bands */
.col{position:relative;max-width:var(--w);margin:0 auto;border-left:1px dashed var(--line);border-right:1px dashed var(--line)}
.stripes{background-image:repeating-linear-gradient(135deg,var(--stripe) 0 1px,transparent 1px 7px)}
.band{position:relative;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band>.col{background:var(--bg)}
.band .dot{position:absolute;width:3px;height:3px;background:var(--fg);opacity:.4;z-index:2}
.band .dot.tl{top:-2px;left:-2px}.band .dot.tr{top:-2px;right:-2px}.band .dot.bl{bottom:-2px;left:-2px}.band .dot.br{bottom:-2px;right:-2px}
.sec-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 32px}
.sec-head h2{display:flex;align-items:baseline;gap:12px;font-family:var(--serif);font-weight:400;font-size:26px;letter-spacing:.01em;line-height:1.2}
.sec-head h2 .n{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--soft)}
.aside{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--soft);text-transform:uppercase}
.spacer{height:28px}.spacer>.col{height:100%;background:var(--bg)}
.pad{padding:28px 32px}

/* header */
header{position:sticky;top:0;z-index:40;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
header .col{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 32px}
header .brand{justify-self:start}
header .hb{justify-self:end}
.brand{font-family:var(--serif);font-size:24px}
.links{display:flex;gap:22px;font-size:13px;color:var(--muted)}
.links a{position:relative;padding:4px 0;transition:color .2s}
.links a:hover{color:var(--fg)}
.links a.on{color:var(--fg);font-weight:600}
.links a.on::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;background:var(--fg);border-radius:2px}
.ibtn{width:32px;height:32px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);transition:color .2s,background .2s}
.ibtn:hover{color:var(--fg);background:var(--hover)}
.ibtn .sun{display:none}:root[data-theme="dark"] .ibtn .sun{display:block}:root[data-theme="dark"] .ibtn .moon{display:none}
.hb{display:flex;gap:10px}
.snd .eq{display:none;align-items:flex-end;gap:2px;height:12px}
.snd.playing .eq{display:flex}.snd.playing .spk{display:none}.snd.playing{color:var(--green);border-color:color-mix(in srgb,var(--green) 40%,transparent)}
.snd .eq i{width:2px;height:100%;border-radius:1px;background:currentColor;transform-origin:bottom;animation:eq .9s ease-in-out infinite}
.snd .eq i:nth-child(2){animation-delay:-.3s}.snd .eq i:nth-child(3){animation-delay:-.6s}.snd .eq i:nth-child(4){animation-delay:-.15s}
@keyframes eq{0%,100%{transform:scaleY(.3)}50%{transform:scaleY(1)}}
.snd.waiting .eq i{animation-play-state:paused}
#menuBtn,#mnav{display:none}
.progress{position:absolute;left:0;bottom:-1px;height:1.5px;width:0;background:var(--fg);transition:width .1s linear}

/* hero */
.crumb{display:flex;justify-content:space-between;align-items:center;padding:18px 32px 0;font-family:var(--mono);font-size:11px;color:var(--soft)}
.crumb a{display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.crumb a:hover{color:var(--fg)}
.hero{padding:28px 32px 30px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.gdot{width:6px;height:6px;border-radius:50%;background:var(--green);flex:none}
.hero h1{margin-top:14px;font-family:var(--serif);font-weight:400;font-size:56px;line-height:1;letter-spacing:-.01em}
.lede{margin-top:16px;max-width:60ch;font-size:16px;line-height:1.65;color:var(--muted)}
.meta{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.meta div{padding:14px 16px 16px;border-right:1px solid var(--line)}
.meta div:first-child{padding-left:32px}
.meta div:last-child{border-right:0}
.meta span{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--soft)}
.meta b{display:block;margin-top:6px;font-size:13.5px;font-weight:600;line-height:1.35}
.links-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.lk{display:inline-flex;align-items:center;gap:7px;padding:7px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card);font-size:12.5px;font-weight:500;transition:border-color .2s,transform .2s}
.lk:hover{border-color:color-mix(in srgb,var(--fg) 26%,transparent);transform:translateY(-1px)}
.lk svg.i{width:13px;height:13px;color:var(--soft)}

/* reading text */
.pad>*+.prose,.pad>*+.bul{margin-top:20px}
.prose{max-width:62ch}
.prose p{font-size:15px;line-height:1.75;color:var(--muted)}
.prose p+p{margin-top:14px}
.prose b,.prose strong{color:var(--fg);font-weight:600}
.prose code,.chip code{font-family:var(--mono);font-size:.88em;padding:1px 5px;border-radius:4px;background:var(--chip);border:1px solid var(--line);color:var(--fg)}
.bul{list-style:none;display:grid;gap:12px;margin-top:16px}
.bul li{display:flex;gap:10px;font-size:15px;line-height:1.7;color:var(--muted)}
.bul li::before{content:"•";font-family:var(--mono);color:var(--soft)}
.bul b{color:var(--fg);font-weight:600}
.h3{margin-top:28px;font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase}
.mt{margin-top:24px}

/* pull quote */
.quote{padding:44px 32px;text-align:center}
.quote .q{font-family:var(--serif);font-size:30px;color:var(--soft);line-height:1}
.quote blockquote{max-width:30ch;margin:8px auto 0;font-family:var(--serif);font-style:italic;font-size:28px;line-height:1.3}

/* figures: the same viewfinder frame as the home-page cards */
.fig{margin-top:24px}
.frame{position:relative;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--chip);cursor:zoom-in}
.frame img{width:100%;height:auto;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.frame.tall{max-height:560px}
.frame.tall img{object-fit:cover;object-position:top}
.frame.phone{max-width:300px;margin:0 auto}
.vf{position:absolute;inset:0;z-index:3;pointer-events:none;opacity:0;transition:opacity .3s ease;color:rgba(255,255,255,.92);filter:drop-shadow(0 0 2px rgba(0,0,0,.6))}
.frame:hover .vf{opacity:1}
.vf i{position:absolute;width:14px;height:14px;border:0 solid rgba(255,255,255,.85)}
.vf i:nth-child(1){top:12px;left:12px;border-top-width:1.5px;border-left-width:1.5px}
.vf i:nth-child(2){top:12px;right:12px;border-top-width:1.5px;border-right-width:1.5px}
.vf i:nth-child(3){bottom:12px;left:12px;border-bottom-width:1.5px;border-left-width:1.5px}
.vf i:nth-child(4){bottom:12px;right:12px;border-bottom-width:1.5px;border-right-width:1.5px}
.vf span{position:absolute;top:15px;display:flex;align-items:center;gap:5px;font:600 9px/1 var(--mono);letter-spacing:.1em}
.vf .rec{left:34px}.vf .iso{right:34px}
.vf .rec b{width:6px;height:6px;border-radius:50%;background:var(--rose);animation:recb 1.1s steps(1) infinite}
@keyframes recb{50%{opacity:.2}}
figcaption{display:flex;gap:10px;margin-top:10px;font-family:var(--mono);font-size:11px;line-height:1.5;color:var(--soft)}
figcaption .fn{color:var(--fg);flex:none}
.fig2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fig2 .fig{margin-top:24px}

/* cards, pipelines, ladders, stats */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:20px}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.cd{border:1px solid var(--line);border-radius:12px;background:var(--card);padding:16px 18px;transition:border-color .2s}
.cd:hover{border-color:color-mix(in srgb,var(--fg) 22%,transparent)}
.cd .t{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:650}
.cd .t .n{font-family:var(--mono);font-size:10.5px;font-weight:500;color:var(--soft)}
.cd p{margin-top:6px;font-size:13px;line-height:1.6;color:var(--muted)}
.cd .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.tag{font-family:var(--mono);font-size:10.5px;color:var(--muted);background:var(--chip);border:1px solid var(--line);border-radius:4px;padding:2px 7px}
.pipe{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:20px}
.st{display:inline-flex;align-items:center;gap:7px;padding:7px 11px;border:1px solid var(--line);border-radius:8px;background:var(--card);font-family:var(--mono);font-size:11.5px}
.st i{width:7px;height:7px;border-radius:50%;background:var(--c,var(--soft))}
.arrow{color:var(--soft);font-family:var(--mono);font-size:12px}
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ladder div{padding:16px 18px;border-right:1px solid var(--line);background:var(--card)}
.ladder div:last-child{border-right:0}
.ladder .lv{display:flex;align-items:flex-end;gap:3px;height:34px;margin-bottom:12px}
.ladder .lv i{width:8px;border-radius:2px;background:var(--fg);opacity:.15}
.ladder .lv i.on{opacity:1}
.ladder b{font-size:14px}
.ladder p{margin-top:4px;font-size:13px;line-height:1.55;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.stats div{padding:20px 32px;border-right:1px solid var(--line)}
.stats div:last-child{border-right:0}
.stats b{display:block;font-family:var(--serif);font-weight:400;font-size:40px;line-height:1}
.stats span{display:block;margin-top:8px;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--soft)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.split .cd .tags{margin-top:10px}
.callout{margin-top:22px;padding:16px 18px;border-left:2px solid var(--fg);background:var(--hover);border-radius:0 10px 10px 0;font-size:14.5px;line-height:1.65;color:var(--fg)}

/* tables + bars */
.tbl{width:100%;margin-top:20px;border-collapse:collapse;font-size:13.5px}
.tbl th{text-align:left;font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--soft);padding:0 0 10px;border-bottom:1px solid var(--line)}
.tbl td{padding:12px 12px 12px 0;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top}
.tbl td:first-child{color:var(--fg);font-weight:600;white-space:nowrap}
.bars{display:grid;gap:14px;margin-top:22px}
.bar .lbl{display:flex;justify-content:space-between;font-size:13px}
.bar .lbl b{font-weight:600}
.bar .lbl span{font-family:var(--mono);font-size:11.5px;color:var(--soft)}
.bar .lbl span em{font-style:normal;color:var(--fg);font-weight:600}
.bar .tr{position:relative;height:8px;margin-top:7px;border-radius:4px;background:var(--chip);border:1px solid var(--line);overflow:hidden}
.bar .tr i{position:absolute;left:0;top:0;bottom:0;border-radius:4px}
.bar .tr .a{background:color-mix(in srgb,var(--fg) 28%,transparent)}
.bar .tr .b{background:var(--green);height:50%;top:auto}
.bar.total .lbl b{font-family:var(--serif);font-weight:400;font-size:18px}
.legend{display:flex;gap:16px;margin-top:14px;font-family:var(--mono);font-size:10.5px;color:var(--soft)}
.legend i{display:inline-block;width:10px;height:6px;border-radius:2px;margin-right:6px;vertical-align:middle}

/* abilities (Greymemory) */
.ab{display:grid;gap:12px;margin-top:20px}
.ab .cd{display:grid;grid-template-columns:64px 1fr;gap:16px;padding:18px}
.ab .num{font-family:var(--serif);font-size:38px;line-height:1;color:var(--soft)}
.ab .cd h4{font-size:15px;font-weight:650}
.ab .cd .sub{margin-top:2px;font-size:13px;color:var(--muted);font-style:italic}
.qa{margin-top:12px;display:grid;gap:6px;font-size:13px;line-height:1.55}
.qa .ctx{color:var(--muted)}
.qa .q,.qa .a{display:flex;gap:8px;align-items:baseline}
.qa .q b,.qa .a b{font-family:var(--mono);font-size:10px;font-weight:600;padding:2px 6px;border-radius:4px;flex:none}
.qa .q b{background:var(--chip);border:1px solid var(--line);color:var(--muted)}
.qa .a b{background:color-mix(in srgb,var(--green) 16%,transparent);color:var(--green);border:1px solid color-mix(in srgb,var(--green) 30%,transparent)}
.qa .a{color:var(--fg);font-weight:500}
.why{margin-top:10px;font-size:13px;line-height:1.6;color:var(--muted)}
.why b{color:var(--fg)}

/* code */
pre.code{margin-top:20px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card);overflow:auto;font-family:var(--mono);font-size:12px;line-height:1.7;color:var(--fg);tab-size:2}
pre.code .c{color:var(--soft)}
pre.code .k{color:var(--claude)}
pre.code .s{color:var(--green)}
.codebar{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding:8px 12px 8px 16px;border:1px solid var(--line);border-bottom:0;border-radius:12px 12px 0 0;background:var(--chip);font-family:var(--mono);font-size:11px;color:var(--soft)}
.codebar+pre.code{margin-top:0;border-radius:0 0 12px 12px}

/* video (Applix) */
.film{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#000}
.film video{width:100%;aspect-ratio:16/9;background:#000}
.scenes{list-style:none;margin-top:20px;border-left:1px dashed var(--line);display:grid;gap:16px;counter-reset:sc}
.scenes li{position:relative;padding-left:22px;font-size:14px;line-height:1.65;color:var(--muted);counter-increment:sc}
.scenes li::before{content:counter(sc,decimal-leading-zero);position:absolute;left:-12px;top:2px;width:22px;height:18px;display:grid;place-items:center;background:var(--bg);font-family:var(--mono);font-size:10px;color:var(--soft)}
.scenes b{color:var(--fg);font-weight:600}

/* next case study */
.next{display:grid;grid-template-columns:1fr 1.1fr;gap:20px;align-items:center;margin:28px 32px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--card);transition:border-color .25s,transform .25s,box-shadow .25s}
.next:hover{border-color:color-mix(in srgb,var(--fg) 26%,transparent);transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.25)}
.next .nshot{position:relative;height:150px;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--chip)}
.next .nshot img{position:absolute;left:36px;top:30px;width:calc(100% - 36px);height:calc(100% - 30px);object-fit:cover;object-position:top left;border-radius:7px 0 0 0;border:1px solid var(--line);transition:left .45s cubic-bezier(.2,.7,.2,1),top .45s cubic-bezier(.2,.7,.2,1),width .45s,height .45s}
.next:hover .nshot img{left:20px;top:18px;width:calc(100% - 20px);height:calc(100% - 18px)}
.next .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--soft)}
.next h3{margin-top:8px;font-family:var(--serif);font-weight:400;font-size:30px;line-height:1.05}
.next p{margin-top:8px;font-size:13px;line-height:1.6;color:var(--muted)}
.next .go{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:12.5px;font-weight:600}

/* footer */
.credits{text-align:center;padding:30px 32px 80px;display:grid;gap:8px}
.credits .by{font-size:14px;color:var(--muted)}.credits .by b{color:var(--fg)}
.credits .small{font-family:var(--mono);font-size:11px;color:var(--soft);display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.credits a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line)}
.credits a:hover{color:var(--fg)}

/* section rail (table of contents) */
#rail{position:fixed;top:50%;transform:translateY(-50%);left:calc(50% + var(--w)/2 + 22px);z-index:30;display:flex;flex-direction:column;gap:2px;max-width:220px}
#rail .rl{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--soft);padding:0 0 8px 10px}
#rail a{display:flex;align-items:center;gap:10px;padding:5px 10px;border-radius:7px;font-size:12px;color:var(--soft);transition:color .2s,background .2s}
#rail a:hover{color:var(--fg);background:var(--hover)}
#rail a .n{font-family:var(--mono);font-size:10px;width:16px}
#rail a.on{color:var(--fg)}
#rail a.on .n{color:var(--green)}

/* lightbox */
#lb{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:4vh 4vw;background:rgba(0,0,0,.82);backdrop-filter:blur(4px);cursor:zoom-out}
#lb.on{display:flex}
#lb img{max-width:100%;max-height:100%;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
#lb span{position:absolute;bottom:18px;left:0;right:0;text-align:center;font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.7)}

/* your cursor (same as home) */
@media (hover:hover) and (pointer:fine){
  html.fc,html.fc *{cursor:none!important}
  html.fc input,html.fc textarea{cursor:text!important}
}
#me{position:fixed;left:0;top:0;z-index:1000;pointer-events:none;opacity:0;transition:opacity .15s;color:var(--green)}
#me.on{opacity:1}
#me svg{display:block;width:22px;height:22px;filter:drop-shadow(0 1px 2px rgba(0,0,0,.35))}
#me span{position:absolute;left:16px;top:20px;background:var(--green);color:#fff;font-family:var(--sans);font-size:12px;font-weight:600;padding:3px 8px;border-radius:0 7px 7px 7px;white-space:nowrap}
#me.tip span{background:var(--fg);color:var(--bg);font-family:var(--mono);font-size:12.5px;padding:6px 11px;border-radius:2px 10px 10px 10px;box-shadow:0 4px 15px rgba(0,0,0,.25)}
#me span.swap{animation:lblIn .16s ease-out}
@keyframes lblIn{from{opacity:0;transform:translateY(5px);filter:blur(4px)}}

/* reveal + theme transition */
.js .rv{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
.js .rv.in{opacity:1;transform:none}
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.22s}
html.vt-theme::view-transition-old(root),html.vt-theme::view-transition-new(root){animation:none;mix-blend-mode:normal}

@media (max-width:1180px){#rail{display:none}}
@media (max-width:720px){
  .links{display:none}
  header .col{display:flex;justify-content:space-between}
  #menuBtn{display:grid}
  #mnav.on{display:grid;padding:8px 20px 16px;border-top:1px solid var(--line);gap:2px}
  #mnav a{padding:10px 0;font-size:15px;color:var(--muted);border-bottom:1px solid var(--line)}
  #mnav a:last-child{border-bottom:0}
  .js .rv{opacity:1;transform:none;transition:none}
  header .col,.sec-head,.pad,.hero,.crumb,.quote,.credits{padding-left:20px;padding-right:20px}
  .hero h1{font-size:40px}
  .meta{grid-template-columns:1fr 1fr}
  .meta div{padding-left:20px!important}
  .meta div:nth-child(2){border-right:0}
  .meta div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .cards,.cards.c3,.split,.fig2,.ladder,.stats{grid-template-columns:1fr}
  .ladder div,.stats div{border-right:0;border-bottom:1px solid var(--line)}
  .stats div{padding:16px 20px}
  .next{grid-template-columns:1fr;margin:24px 20px}
  .ab .cd{grid-template-columns:1fr;gap:6px}
  .quote blockquote{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none}
}