/* ==========================================================================
   CASE PAGES: same art direction as the landing page (editorial serif,
   hairlines, soft grain gradients). Scroll staging lives in case.js.
   ========================================================================== */
:root{
  --bg:#1c1a1f; --paper:#252229; --ink:#ece7f2; --muted:#aaa2b6; --line:#38343f;
  --accent:#c6b6f2; --accent-ink:#cbbcf6; --pencil:rgba(236,231,242,.6); --glass:rgba(28,26,31,.72);
  --shadow:0 2px 10px rgba(0,0,0,.35); --shadow-lift:0 14px 34px rgba(0,0,0,.45);
  --margin-grid:#232027; --blend:screen; --print:#2c2930; --chosen:#2d2838;
  --f-serif:"Newsreader",Georgia,"Times New Roman",serif;
  --f-sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ease:cubic-bezier(0.2,0.8,0.2,1);
  color-scheme:dark;
}
html[data-mode="cream"]{
  --bg:#f5eee1; --paper:#fbf6ec; --ink:#1f1b16; --muted:#5e564a; --line:#dcd1bd;
  --accent:#d6e66a; --accent-ink:#5f6b14; --pencil:rgba(31,27,22,.62); --glass:rgba(245,238,225,.74);
  --shadow:0 2px 8px rgba(0,0,0,.10); --shadow-lift:0 12px 28px rgba(0,0,0,.14);
  --margin-grid:#efe6d4; --blend:multiply; --print:#fdfaf4; --chosen:#f1f5d2;
  color-scheme:light;
}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}

*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;color:var(--ink);font:400 17px/1.65 var(--f-sans);background-color:var(--bg);
  background-image:linear-gradient(var(--margin-grid) 1px,transparent 1px),linear-gradient(90deg,var(--margin-grid) 1px,transparent 1px);background-size:28px 28px}
h1,h2,h3,p,ul,ol,figure,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;z-index:200;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:99px;font:600 14px var(--f-sans)}
.skip:focus{top:12px}
.label{font:600 11px/1.3 var(--f-sans);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.page{max-width:1240px;margin:0 auto;background:var(--bg);position:relative;border-inline:1px solid var(--line);overflow-x:clip;
  padding-left:max(clamp(16px,4vw,56px),env(safe-area-inset-left,0px));padding-right:max(clamp(16px,4vw,56px),env(safe-area-inset-right,0px))}
.grain{position:relative;isolation:isolate}
.grain::after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;border-radius:inherit;opacity:.11;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
.mesh{background:radial-gradient(60% 75% at 18% 22%,var(--a) 0,transparent 70%),radial-gradient(55% 65% at 88% 28%,var(--b) 0,transparent 70%),radial-gradient(75% 70% at 50% 108%,var(--c) 0,transparent 70%),var(--base)}
.g-rose{--a:#56353a;--b:#4f3c35;--c:#4c3442;--base:#2b2429}
html[data-mode="cream"] .g-rose{--a:#eab1a8;--b:#f4d3b6;--c:#e2b6c4;--base:#f4dcd3}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;margin-inline:calc(-1*max(clamp(16px,4vw,56px),env(safe-area-inset-left,0px)));padding:14px max(clamp(16px,4vw,56px),env(safe-area-inset-left,0px));
  display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);background:var(--bg);z-index:60}
.logo{display:flex;align-items:center;gap:10px;font:400 24px/1 var(--f-serif);letter-spacing:-.02em}
.logo svg{width:28px;height:28px}.logo .dot{fill:var(--accent)}.logo .mk{stroke:var(--bg)}
.hright{display:flex;align-items:center;gap:10px}
.back{font:500 14.5px var(--f-sans);color:var(--muted);padding:8px 10px}
.back:hover{color:var(--ink)}
.iconbtn{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;box-shadow:inset 0 0 0 1.5px var(--line)}
.iconbtn:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}
.iconbtn svg{width:18px;height:18px;fill:none;stroke:var(--ink);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.iconbtn .moon{display:none}
html[data-mode="dark"] .iconbtn .moon{display:block}
html[data-mode="dark"] .iconbtn .sun{display:none}
.pill{display:inline-flex;align-items:center;gap:8px;font:600 14px var(--f-sans);padding:10px 18px;border-radius:99px;background:var(--ink);color:var(--bg);transition:transform .3s var(--ease)}
.pill:hover{transform:translateY(-2px)}
.pill.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}

/* opening */
.open{padding-block:72px 40px;display:grid;gap:24px}
.open h1{font:300 clamp(2.6rem,6vw,5rem)/1.02 var(--f-serif);letter-spacing:-.03em;max-width:16ch;text-wrap:balance}
.stand{font:300 clamp(1.25rem,2.2vw,1.6rem)/1.35 var(--f-serif);color:var(--muted);max-width:40ch}
.open .links{display:flex;gap:10px;flex-wrap:wrap}
.lead-img{position:relative;margin-top:24px;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lift)}
.lead-img img{display:block;width:100%;height:auto;aspect-ratio:2/1;object-fit:cover}
.lead-img.art{aspect-ratio:21/9}
.lead-img.art svg{position:absolute;inset:18% 30%;width:40%;height:64%;color:var(--pencil);z-index:1}

/* summary: readable in 30 seconds */
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.summary{display:grid;grid-template-columns:repeat(var(--cols,5),minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-block:56px 0}
.summary div{padding:20px 18px 22px 0;display:grid;gap:6px;align-content:start;min-width:0}
.summary div+div{padding-left:18px;border-left:1px solid var(--line)}
.summary dd{font:400 1.02rem/1.4 var(--f-serif)}
.summary .res dd{color:var(--accent-ink)}

/* sections */
.sec{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:12px 48px;padding-block:88px;border-bottom:1px solid var(--line)}
.sec>.label{padding-top:10px}
.sec h2{font:300 clamp(1.8rem,3.4vw,2.6rem)/1.1 var(--f-serif);letter-spacing:-.025em;margin-bottom:18px}
.prose{display:grid;gap:16px;max-width:64ch}
.prose p{color:var(--muted)}
.prose p strong{color:var(--ink);font-weight:500}
.quote{font:300 clamp(1.6rem,3vw,2.3rem)/1.25 var(--f-serif);letter-spacing:-.015em;max-width:30ch;padding-left:24px;border-left:2px solid var(--accent)}
.note{font-size:.88rem;color:var(--muted);margin-top:14px;max-width:60ch}

/* decisions */
.decs{display:grid;gap:56px}
.dec{display:grid;gap:16px}
.dec h3{font:400 1.35rem/1.25 var(--f-serif);letter-spacing:-.01em}
.dec h3 span{font:600 11px var(--f-sans);letter-spacing:.12em;color:var(--muted);display:block;margin-bottom:6px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.opt{position:relative;border-radius:14px;padding:18px 20px 20px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:8px;align-content:start;color:var(--muted)}
.opt .label{display:flex;justify-content:space-between;align-items:center}
.opt.chosen{background:var(--chosen);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--accent)}
.opt.chosen .tick{font:600 10.5px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:99px;background:var(--accent);color:#1c1a1f}
.why{font-size:.98rem}
.why b{font-weight:600;color:var(--accent-ink)}

/* shipped */
.shots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.shots figure{display:grid;gap:10px}
.shots figure:first-child{grid-column:1/-1}
.shots .frame{border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.shots img{display:block;width:100%;height:auto}
.shots figcaption{font-size:.9rem;color:var(--muted)}
.facts{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.facts li{font:600 11px var(--f-sans);letter-spacing:.08em;text-transform:uppercase;padding:6px 11px;border-radius:99px;box-shadow:inset 0 0 0 1px var(--line)}
.flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;border-radius:14px;box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.flow li{padding:18px 16px;display:grid;gap:6px;align-content:start;border-left:1px solid var(--line)}
.flow li:first-child{border-left:0}
.flow b{font:400 1.05rem/1.25 var(--f-serif)}
.flow span{font-size:.88rem;color:var(--muted)}

/* outcome */
.nums{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.num{border-radius:14px;padding:22px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:8px;align-content:start}
.num b{font:300 clamp(2rem,3.6vw,2.8rem)/1 var(--f-serif);letter-spacing:-.02em}
.num span{font-size:.92rem;color:var(--muted)}
.honest{margin-top:22px;border-radius:14px;padding:18px 20px;background:var(--paper);display:grid;gap:6px}
.honest p{color:var(--muted);font-size:.96rem}

/* prev / next */
.pn{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding-block:72px}
.pn a{border-radius:16px;padding:22px 24px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:6px;transition:box-shadow .3s var(--ease),translate .3s var(--ease)}
.pn a:hover{box-shadow:inset 0 0 0 1.5px var(--ink);translate:0 -2px}
.pn a:last-child{text-align:right}
.pn b{font:400 1.3rem/1.2 var(--f-serif)}
.legal{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-block:18px 36px;border-top:1px solid var(--line);font:500 12px var(--f-sans);color:var(--muted)}

/* document formats: tables, bullets, steps, placeholders */
.add{color:var(--muted);font-style:italic;background:repeating-linear-gradient(90deg,var(--line) 0 4px,transparent 4px 8px) 0 100%/100% 1px no-repeat;padding-bottom:1px}
.intro{color:var(--ink);font:300 1.3rem/1.4 var(--f-serif);max-width:52ch;margin-bottom:14px}
.outro{color:var(--muted);max-width:64ch;margin-top:14px}
.blist{display:grid;gap:10px;max-width:66ch}
.blist li{position:relative;padding-left:20px;color:var(--muted)}
.blist li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--accent)}
.blist li b{color:var(--ink);font-weight:500}
.tblwrap{overflow-x:auto;border-radius:14px;box-shadow:inset 0 0 0 1px var(--line)}
.tbl{width:100%;border-collapse:collapse;min-width:560px;font-size:.95rem}
.tbl th{text-align:left;font:600 10.5px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:14px 16px;border-bottom:1px solid var(--line)}
.tbl td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{color:var(--ink)}
.tbl td b{font-weight:500;color:var(--ink)}
.steps{display:grid;gap:0;border-radius:14px;box-shadow:inset 0 0 0 1px var(--line);overflow:hidden;counter-reset:s}
.steps li{display:grid;grid-template-columns:44px 1fr;gap:6px 14px;padding:16px 18px;border-top:1px solid var(--line);counter-increment:s}
.steps li:first-child{border-top:0}
.steps li::before{content:counter(s,decimal-leading-zero);font:500 12px var(--f-sans);color:var(--accent-ink);padding-top:4px}
.steps b{font:400 1.08rem/1.3 var(--f-serif);color:var(--ink)}
.steps span{grid-column:2;color:var(--muted);font-size:.95rem}
.tag-planned{display:inline-block;margin-left:10px;vertical-align:middle;font:600 10px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:99px;box-shadow:inset 0 0 0 1px var(--accent);color:var(--accent-ink)}
.lead-img.art svg{color:var(--pencil)}
.g-sky{--a:#2f4256;--b:#3f3a5c;--c:#2c4250;--base:#24262f}
html[data-mode="cream"] .g-sky{--a:#b9d3e8;--b:#d0c7ea;--c:#c6e0ee;--base:#e3ebf3}

/* PM blocks: TL;DR, metric tree, feature tiles, video frame, roadmap */
.tldr{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:40px}
.tldr div{border-radius:16px;padding:20px 22px 22px;background:var(--paper);display:grid;gap:8px;align-content:start}
.tldr div:last-child{box-shadow:inset 0 0 0 1.5px var(--accent)}
.tldr p:last-child{font:400 1.08rem/1.45 var(--f-serif)}
.tree{display:grid;gap:14px}
.tree .ns{justify-self:start;border-radius:14px;padding:16px 20px;background:var(--chosen);box-shadow:inset 0 0 0 1.5px var(--accent);display:grid;gap:4px;max-width:520px}
.tree .ns b,.tree .l1 b{font:400 1.15rem/1.3 var(--f-serif)}
.tree .ls{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:12px;position:relative;padding-top:18px}
.tree .ls::before{content:"";position:absolute;left:24px;right:24px;top:0;height:18px;border:1px solid var(--line);border-bottom:0;border-radius:10px 10px 0 0}
.tree .l1{border-radius:12px;padding:14px 16px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:4px;align-content:start}
.tree .l1 span,.tree .ns span{font-size:.9rem;color:var(--muted)}
.tree .guard{font-size:.92rem;color:var(--muted)}
.tree .guard b{color:var(--ink);font-weight:500}
.tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}
.tiles div{border-radius:14px;padding:18px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:6px;align-content:start}
.tiles b{font:400 1.12rem/1.25 var(--f-serif)}
.tiles span{font-size:.93rem;color:var(--muted)}
.vframe{position:relative;border-radius:16px;overflow:hidden;background:#0d0c0f;box-shadow:var(--shadow-lift)}
.vframe.browser{padding-top:34px}
.vframe.browser::before{content:"";position:absolute;left:14px;top:13px;width:9px;height:9px;border-radius:50%;background:#5c5862;box-shadow:15px 0 #5c5862,30px 0 #5c5862}
.vframe .url{position:absolute;left:50%;top:8px;translate:-50% 0;font:500 11.5px var(--f-sans);color:#aaa2b6;background:#1f1d23;border-radius:99px;padding:3px 14px}
.vframe video{display:block;width:100%;height:auto;aspect-ratio:var(--vr,16/9);object-fit:cover;background:#0d0c0f}
.vframe .soon{position:absolute;left:16px;bottom:16px;display:none;align-items:center;gap:8px;font:600 11px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;padding:7px 12px;border-radius:99px;background:rgba(20,19,23,.78);color:#ece7f2;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.vframe .soon::before{content:"";width:0;height:0;border-left:8px solid currentColor;border-block:5px solid transparent}
.vframe.novideo .soon{display:inline-flex}
.vcap{margin-top:10px;font-size:.9rem;color:var(--muted)}
.road{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.road div{border-radius:14px;padding:18px;box-shadow:inset 0 0 0 1px var(--line);display:grid;gap:10px;align-content:start}
.road div:first-child{box-shadow:inset 0 0 0 1.5px var(--accent)}
.road ul{display:grid;gap:8px}
.road li{color:var(--muted);font-size:.95rem;padding-left:14px;position:relative}
.road li::before{content:"";position:absolute;left:0;top:.7em;width:6px;height:1px;background:var(--muted)}
@media(max-width:900px){.tldr,.tiles,.road{grid-template-columns:1fr}.tree .ls{grid-template-columns:1fr}.tree .ls::before{display:none}}

/* diagrams: hand-drawn inline SVG, themed through currentColor and tokens */
.fig{margin-block:4px 28px}
.fig.after{margin-block:28px 0}
.dgwrap{overflow-x:auto;border-radius:16px;background:color-mix(in srgb,var(--paper) 55%,transparent);box-shadow:inset 0 0 0 1px var(--line);padding:22px 20px}
.dg{display:block;width:100%;height:auto;min-width:560px;color:var(--ink);overflow:visible}
.dg.narrow{max-width:600px;min-width:460px;margin-inline:auto}
.dg .bx{fill:var(--bg);stroke:var(--line);stroke-width:1.2}
.dg .bx.hot{fill:var(--chosen);stroke:var(--accent);stroke-width:1.6}
.dg .bx.ghost{fill:none;stroke:var(--muted);stroke-dasharray:4 4;opacity:.8}
.dg .bx.soft{fill:var(--paper);stroke:var(--line)}
.dg .zone{fill:none;stroke:var(--accent);stroke-width:1.3;stroke-dasharray:6 5}
.dg .chip{fill:none;stroke:var(--muted);stroke-width:1}
.dg text{fill:currentColor;font:400 11.5px var(--f-sans)}
.dg .t{font:400 14px var(--f-serif)}
.dg .s{fill:var(--muted);font-size:11px}
.dg .lb{fill:var(--muted);font:600 9.5px var(--f-sans);letter-spacing:.1em}
.dg .lb.hot,.dg .al.hot{fill:var(--accent-ink)}
.dg .al{fill:var(--muted);font:italic 400 11px var(--f-sans)}
.dg .q{fill:var(--muted);font:italic 300 13px var(--f-serif);opacity:.7}
.dg .ln{fill:none;stroke:var(--muted);stroke-width:1.3}
.dg .ln.hot{stroke:var(--accent);stroke-width:1.6}
.dg .ln.dash{stroke-dasharray:4 4}
.dg .ax{stroke:var(--muted);stroke-width:1.2;fill:none}
.dg .grid{stroke:var(--line);stroke-dasharray:3 5;fill:none}
.dg .mk{fill:var(--muted)}
.dg .mk.hot{fill:var(--accent)}
.dg .pt{fill:var(--bg);stroke:var(--muted);stroke-width:1.6}
.dg .pt.hot{fill:var(--accent);stroke:var(--accent)}
.dg .pt.ghost{fill:none;stroke:var(--muted);stroke-dasharray:2 2}
/* lime is too faint as a line colour on cream: diagrams use a deeper olive there */
html[data-mode="cream"] .dg .ln.hot,html[data-mode="cream"] .dg .zone{stroke:#7d8b1a}
html[data-mode="cream"] .dg .bx.hot{stroke:#9aab2a}
html[data-mode="cream"] .dg .mk.hot,html[data-mode="cream"] .dg .pt.hot{fill:#7d8b1a;stroke:#7d8b1a}
.fig .swipe{display:none;align-items:center;gap:6px;margin-top:8px;font:600 10.5px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.fig figcaption{margin-top:10px;font-size:.9rem;color:var(--muted);max-width:70ch}

/* simple fallback */
.simple .rv{opacity:0;translate:0 16px;transition:opacity .7s var(--ease),translate .7s var(--ease)}
.simple .rv.in{opacity:1;translate:0 0}
@media (prefers-reduced-motion:reduce){.simple .rv{translate:none;transition:opacity .4s linear}}

@media(max-width:900px){
  .summary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .summary div{border-left:0!important;padding-left:0!important;border-top:1px solid var(--line)}
  .summary div:nth-child(-n+2){border-top:0}
  .sec{grid-template-columns:minmax(0,1fr)}
  .flow{grid-template-columns:1fr 1fr}
  .flow li{border-left:0;border-top:1px solid var(--line)}
}
@media(max-width:640px){
  .opts,.shots,.nums,.pn,.flow{grid-template-columns:1fr}
  .shots figure:first-child{grid-column:auto}
  .pn a:last-child{text-align:left}
  .sec{padding-block:64px}
  .back span{display:none}
  /* tables become one card per row; each cell carries its column name */
  .tblwrap{overflow:visible;box-shadow:none;border-radius:0}
  .tbl{min-width:0;display:block}
  .tbl thead{display:none}
  .tbl tbody{display:grid;gap:12px}
  .tbl tr{display:grid;gap:10px;padding:16px;border-radius:14px;box-shadow:inset 0 0 0 1px var(--line)}
  .tbl td{display:block;padding:0;border:0}
  .tbl td::before{content:attr(data-label);display:block;margin-bottom:3px;font:600 10px var(--f-sans);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
  .tbl td:first-child{font:400 1.08rem/1.3 var(--f-serif)}
  .tbl td:first-child::before{display:none}
  /* diagrams keep a readable size and scroll sideways, with a hint and a fade on the cut edge */
  .dgwrap{padding:16px 14px;-webkit-mask-image:linear-gradient(90deg,#000 85%,transparent);mask-image:linear-gradient(90deg,#000 85%,transparent)}
  .dgwrap.end{-webkit-mask-image:none;mask-image:none}
  .dg{min-width:740px}
  .dg.narrow{min-width:540px}
  .fig .swipe{display:flex}
  .steps li{grid-template-columns:32px minmax(0,1fr);padding:14px}
}