:root{
    --paper:#f9f4ea; --paper-deep:#f1eadd; --card:#fdfaf3;
    --ink:#1a160f; --ink-2:#3a342a; --muted:#6e6455; --faint:#a89c86;
    --line:#ddd3c1; --line-soft:#e7dfce;
    --accent:#6b4ec2; --accent-ink:#5540a3; --ember:#c56a3a;
    --dark:#120d07; --dark-2:#1b140c; --cream:#f2e9da;
    --before:#e8894d; --before-ink:#a4501f; --v2:#c9a6a0; --after:#62d99c; --after-ink:#2f7a52;
    --display:"Fraunces","Charter",Georgia,serif;
    --body:"Inter","Helvetica Neue",system-ui,sans-serif;
    --mono:"JetBrains Mono","SF Mono",ui-monospace,Menlo,monospace;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
  a{color:inherit}
  img,svg{display:block;max-width:100%}
  ::selection{background:rgba(107,78,194,.18)}
  .wrap{max-width:1180px;margin:0 auto;padding:0 clamp(18px,5vw,64px)}
  .narrow{max-width:760px}
  .mono{font-family:var(--mono)}
  .eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase}
  b,strong{font-weight:600}

  .reveal{transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1)}
  html.js .reveal{opacity:0;transform:translateY(22px)}
  html.js .reveal.in{opacity:1;transform:none}
  .d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}

  /* ===== back chip ===== */
  .xa-back{position:fixed;left:18px;bottom:18px;z-index:99999;display:inline-flex;align-items:center;gap:7px;
    font-family:var(--body);font-size:12px;font-weight:600;letter-spacing:.02em;color:#1c1811;background:#fbf7ee;
    border:1px solid #d9cfbd;border-radius:100px;padding:8px 15px;text-decoration:none;
    box-shadow:0 6px 20px -8px rgba(28,24,17,.4);transition:transform .18s ease,box-shadow .18s ease}
  .xa-back:hover{transform:translateY(-2px);box-shadow:0 10px 26px -8px rgba(28,24,17,.55)}
  .xa-back .xa-arrow{transition:transform .18s ease}
  .xa-back:hover .xa-arrow{transform:translateX(-2px)}

  /* ===== HERO ===== */
  .hero{position:relative;overflow:hidden;color:var(--cream);padding:clamp(64px,9vw,112px) 0 clamp(56px,7vw,88px);
    background:radial-gradient(70% 60% at 12% 8%,rgba(107,78,194,.34),transparent 60%),radial-gradient(60% 70% at 95% 100%,rgba(232,137,77,.26),transparent 60%),linear-gradient(160deg,#1a130b,#0e0a05);
    background-size:140% 140%;animation:drift 26s ease-in-out infinite}
  .hero .wrap{display:grid;grid-template-columns:1fr 1.08fr;gap:clamp(28px,4.5vw,64px);align-items:center}
  @media(max-width:920px){.hero .wrap{grid-template-columns:1fr}}
  .hero .eyebrow{color:rgba(242,233,218,.62);margin-bottom:22px}
  .hero .eyebrow::before{content:"";display:inline-block;width:26px;height:1.5px;background:var(--before);vertical-align:middle;margin-right:12px;margin-bottom:4px}
  .hero h1{font-family:var(--display);font-weight:600;font-size:clamp(64px,10vw,132px);line-height:.86;letter-spacing:-.035em}
  .hero h1 .def{display:block;font-family:var(--mono);font-weight:400;font-size:13px;letter-spacing:.06em;color:rgba(242,233,218,.5);margin-top:18px;line-height:1.5}
  .hero .tag{font-family:var(--display);font-size:clamp(24px,2.7vw,34px);line-height:1.18;letter-spacing:-.01em;margin-top:26px;max-width:18ch}
  .hero .tag em{color:var(--before);font-style:italic}
  .hero .lede{margin-top:20px;max-width:48ch;color:rgba(242,233,218,.78);font-size:clamp(16px,1.35vw,18.5px)}
  .hstats{display:grid;grid-template-columns:repeat(4,auto);justify-content:start;gap:14px 30px;margin-top:30px}
  @media(max-width:520px){.hstats{grid-template-columns:repeat(2,auto)}}
  .hstats div{min-width:0}
  .hstats .n{font-weight:800;font-size:28px;letter-spacing:-.02em;line-height:1;color:#fff}
  .hstats .l{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(242,233,218,.5);margin-top:6px}

  .scope{position:relative;border-radius:22px;padding:22px 22px 16px;background:linear-gradient(165deg,rgba(255,255,255,.055),rgba(255,255,255,.015));border:1px solid rgba(255,255,255,.1);box-shadow:0 50px 100px -50px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.07)}
  .scope .lab{display:flex;justify-content:space-between;gap:10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:rgba(242,233,218,.45);margin-bottom:6px}
  .scope svg{width:100%;height:auto}
  .scope .big{position:absolute;left:15%;top:17%}
  @media(max-width:620px){.scope .big{position:static;margin:6px 0 2px}.scope .lab{flex-wrap:wrap}}
  .scope .big .x{font-weight:800;font-size:clamp(46px,6vw,76px);line-height:.9;letter-spacing:-.04em;color:#fff}
  .scope .big .c{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(242,233,218,.55);margin-top:8px;max-width:22ch;line-height:1.5}
  .axis text,.scope text{font-family:var(--mono);font-size:11px;fill:rgba(242,233,218,.5)}
  .gridl{stroke:rgba(255,255,255,.07);stroke-width:1}
  .c-before{fill:none;stroke:var(--before);stroke-width:3.2;stroke-linecap:round;filter:drop-shadow(0 0 10px rgba(232,137,77,.55))}
  .c-after{fill:none;stroke:var(--after);stroke-width:3.2;stroke-linecap:round;filter:drop-shadow(0 0 8px rgba(98,217,156,.6))}
  html.js .draw{stroke-dasharray:1400;stroke-dashoffset:1400;animation:ink 2.4s cubic-bezier(.3,.6,.2,1) .35s forwards}
  html.js .draw.late{animation-delay:1.3s}
  @keyframes ink{to{stroke-dashoffset:0}}
  @keyframes drift{0%,100%{background-position:0% 0%}50%{background-position:100% 100%}}

  .jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:34px}
  .jump a{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-decoration:none;color:rgba(242,233,218,.78);border:1px solid rgba(242,233,218,.2);border-radius:100px;padding:6px 13px;background:rgba(255,255,255,.03);transition:border-color .18s,color .18s}
  .jump a:hover{border-color:rgba(242,233,218,.55);color:#fff}

  /* ===== summary strip ===== */
  .strip{border-bottom:1px solid var(--line);background:var(--paper-deep)}
  .strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
  @media(max-width:820px){.strip .wrap{grid-template-columns:1fr 1fr}}
  .strip .cell{padding:26px 22px 24px 0;border-right:1px solid var(--line)}
  .strip .cell:last-child{border-right:0}
  @media(max-width:820px){.strip .cell:nth-child(2n){border-right:0}.strip .cell{padding:20px 14px 18px 0}}
  .strip .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
  .strip .v{font-family:var(--display);font-size:clamp(19px,1.9vw,24px);line-height:1.2;margin-top:8px;letter-spacing:-.01em}

  /* ===== sections ===== */
  section.sec{padding:clamp(72px,9vw,124px) 0;position:relative}
  section.sec.alt{background:linear-gradient(180deg,var(--paper),#f4ecdd)}
  section.sec.dark{background:linear-gradient(170deg,#17110a,#0f0b06);color:var(--cream)}
  .sh{margin-bottom:clamp(34px,4.5vw,56px)}
  .sh .num{font-family:var(--mono);font-size:13px;letter-spacing:.2em;color:var(--ember)}
  .dark .sh .num{color:var(--before)}
  .sh h2{font-family:var(--display);font-weight:600;font-size:clamp(36px,5.4vw,72px);line-height:1;letter-spacing:-.02em;margin-top:16px;max-width:18ch}
  .sh h2 em{font-style:italic;color:var(--muted);font-weight:400}
  .dark .sh h2 em{color:rgba(242,233,218,.5)}
  .sh p{margin-top:20px;max-width:62ch;font-size:clamp(17px,1.5vw,20px);color:var(--ink-2);line-height:1.55}
  .dark .sh p{color:rgba(242,233,218,.78)}
  .prose p{max-width:66ch;color:var(--ink-2);margin-top:16px}
  .prose p:first-child{margin-top:0}
  .dark .prose p{color:rgba(242,233,218,.78)}
  code{font-family:var(--mono);font-size:.86em;background:var(--paper-deep);border:1px solid var(--line-soft);border-radius:5px;padding:1px 6px;white-space:nowrap}
  .dark code,.binary code,.panel code{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.12);color:#fff}
  .note{font-size:14px;color:var(--muted);margin-top:14px;max-width:70ch}
  .dark .note{color:rgba(242,233,218,.5)}

  /* architecture */
  .arch{display:grid;grid-template-columns:1.25fr 1fr;gap:clamp(22px,3.5vw,48px);align-items:start}
  @media(max-width:900px){.arch{grid-template-columns:1fr}}
  .binary{position:relative;border-radius:22px;padding:22px;background:linear-gradient(160deg,#1c150c,#100b06);border:1px solid rgba(255,255,255,.08);box-shadow:0 40px 80px -46px rgba(20,16,9,.85);color:var(--cream)}
  .binary .bh{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:16px}
  .binary .bh .t{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(242,233,218,.6)}
  .binary .bh .s{font-family:var(--mono);font-size:11.5px;color:var(--after)}
  .layer{display:grid;grid-template-columns:118px 1fr;gap:14px;align-items:start;padding:13px 14px;border-radius:12px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.07);margin-top:8px}
  @media(max-width:520px){.layer{grid-template-columns:1fr;gap:4px}}
  .layer .ln{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#d7c8ff;padding-top:2px}
  .layer .ld{font-size:14.5px;line-height:1.5;color:rgba(242,233,218,.82)}
  .layer .ld b{color:#fff}
  .layer.store{background:rgba(98,217,156,.06);border-color:rgba(98,217,156,.22)}
  .layer.store .ln{color:var(--after)}
  .flow{height:14px;margin:0 0 0 64px;border-left:1.5px dashed rgba(242,233,218,.22)}
  .disk{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}
  .disk span{font-family:var(--mono);font-size:11px;color:rgba(242,233,218,.7);border:1px dashed rgba(242,233,218,.25);border-radius:7px;padding:4px 9px}
  .facts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .fact{border:1px solid var(--line);border-radius:16px;background:var(--card);padding:18px 18px 16px}
  .fact .n{font-weight:800;font-size:30px;letter-spacing:-.02em;line-height:1}
  .fact .l{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.45}
  .honest{margin-top:14px;border:1px solid #e6cfa6;background:#fbf1de;border-radius:16px;padding:18px 20px}
  .honest h4{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#8a5a1c;margin-bottom:8px}
  .honest ul{margin-left:18px;font-size:14.5px;color:var(--ink-2)}
  .honest li{margin-top:5px}

  /* process */
  .method{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:8px}
  @media(max-width:900px){.method{grid-template-columns:1fr 1fr}}
  @media(max-width:520px){.method{grid-template-columns:1fr}}
  .mstep{border:1px solid var(--line);border-radius:16px;background:var(--card);padding:16px 16px 18px;position:relative}
  .mstep .i{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--ember)}
  .mstep h4{font-family:var(--display);font-size:21px;font-weight:600;margin-top:6px;letter-spacing:-.01em}
  .mstep p{font-size:14px;color:var(--muted);margin-top:6px;line-height:1.5}
  .verdict{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
  @media(max-width:760px){.verdict{grid-template-columns:1fr}}
  .vbox{border-radius:16px;padding:18px 20px;border:1px solid var(--line)}
  .vbox.good{background:#eef5ee;border-color:#cfe3d4}
  .vbox.gap{background:#fbf0e6;border-color:#efd3bb}
  .vbox h4{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
  .vbox.good h4{color:var(--after-ink)}.vbox.gap h4{color:var(--before-ink)}
  .vbox ul{margin:10px 0 0 18px;font-size:14.5px;color:var(--ink-2)}
  .vbox li{margin-top:5px}

  .timeline{position:relative;margin-top:clamp(40px,5vw,64px)}
  .timeline::before{content:"";position:absolute;left:15px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--accent),var(--before),var(--after-ink))}
  .tl{position:relative;padding:0 0 30px 52px}
  .tl:last-child{padding-bottom:0}
  .tl .dot{position:absolute;left:6px;top:4px;width:20px;height:20px;border-radius:50%;background:var(--paper);border:2px solid var(--accent)}
  .tl.r1 .dot{border-color:var(--ink)} .tl.r2 .dot{border-color:var(--before)} .tl.r3 .dot{border-color:var(--after-ink);background:#e3f3e8}
  .tl .when{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
  .tl h4{font-family:var(--display);font-size:clamp(21px,2.1vw,26px);font-weight:600;letter-spacing:-.01em;margin-top:4px}
  .tl p{max-width:64ch;color:var(--ink-2);margin-top:6px;font-size:16px}
  .tl .who{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;border:1px solid currentColor;border-radius:100px;padding:2px 9px;margin-left:8px;vertical-align:3px}
  .who.b{color:var(--accent-ink)} .who.c{color:var(--after-ink)} .who.h{color:var(--ember)}

  /* cms */
  .cms{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(22px,3.5vw,48px);align-items:start}
  @media(max-width:920px){.cms{grid-template-columns:1fr}}
  .tools{border:1px solid var(--line);border-radius:18px;background:var(--card);overflow:hidden}
  .tools .row{display:grid;grid-template-columns:minmax(0,190px) 1fr;gap:14px;padding:12px 18px;border-top:1px solid var(--line-soft);font-size:14.5px}
  .tools .row:first-child{border-top:0;background:var(--paper-deep);font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
  .tools .row code{white-space:normal;word-break:break-all}
  @media(max-width:520px){.tools .row{grid-template-columns:1fr;gap:4px}}
  .term{border-radius:18px;background:#0f0b06;border:1px solid rgba(255,255,255,.08);box-shadow:0 40px 80px -46px rgba(20,16,9,.85);overflow:hidden}
  .term .bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid rgba(255,255,255,.07)}
  .term .bar i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.14)}
  .term .bar span{margin-left:8px;font-family:var(--mono);font-size:11px;color:rgba(242,233,218,.45);letter-spacing:.06em}
  .term pre{margin:0;padding:16px 18px 18px;font-family:var(--mono);font-size:12.5px;line-height:1.62;color:rgba(242,233,218,.86);white-space:pre-wrap;word-break:break-word}
  .term .q{color:#d7c8ff}.term .a{color:var(--after)}.term .e{color:var(--before)}.term .m{color:rgba(242,233,218,.4)}
  .uses{margin-top:18px;display:grid;gap:10px}
  .use{display:grid;grid-template-columns:22px 1fr;gap:10px;font-size:15px;color:var(--ink-2)}
  .use .ck{width:20px;height:20px;border-radius:6px;background:#e3f3e8;color:var(--after-ink);font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:700;margin-top:2px}

  /* curve section (dark) */
  .chart{border-radius:22px;padding:clamp(16px,2.5vw,26px);background:linear-gradient(165deg,rgba(255,255,255,.05),rgba(255,255,255,.012));border:1px solid rgba(255,255,255,.09)}
  .chart svg{width:100%;height:auto}
  .chart text{font-family:var(--mono);font-size:12px;fill:rgba(242,233,218,.55)}
  .legend{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:12px;font-family:var(--mono);font-size:12px;color:rgba(242,233,218,.75)}
  .legend span::before{content:"";display:inline-block;width:18px;height:3px;border-radius:2px;margin-right:8px;vertical-align:middle}
  .legend .lb::before{background:var(--before)} .legend .l2::before{background:repeating-linear-gradient(90deg,var(--v2) 0 5px,transparent 5px 9px)} .legend .la::before{background:var(--after)}
  .legend .lg::before{background:rgba(242,233,218,.3)}
  .dtable{width:100%;border-collapse:collapse;margin-top:26px;font-family:var(--mono);font-size:13px}
  .dtable th,.dtable td{padding:9px 10px;text-align:right;border-bottom:1px solid rgba(255,255,255,.08);white-space:nowrap}
  .dtable th:first-child,.dtable td:first-child{text-align:left}
  .dtable th{font-weight:500;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(242,233,218,.45)}
  .dtable td{color:rgba(242,233,218,.82)}
  .dtable .b{color:var(--before)} .dtable .v{color:var(--v2)} .dtable .f{color:var(--after)}
  .scrollx{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .two{display:grid;grid-template-columns:1fr 1fr;gap:clamp(18px,3vw,36px);margin-top:clamp(40px,5vw,64px)}
  @media(max-width:900px){.two{grid-template-columns:1fr}}
  .two>*,.arch>*,.cms>*,.hero .wrap>*{min-width:0}
  .panel{border-radius:18px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.08);padding:20px 20px 18px}
  .panel h3{font-family:var(--display);font-size:24px;font-weight:600;letter-spacing:-.01em;color:#fff}
  .panel p{font-size:15px;color:rgba(242,233,218,.74);margin-top:8px}
  .code{margin-top:14px;border-radius:12px;background:#0a0704;border:1px solid rgba(255,255,255,.07);padding:14px 16px;font-family:var(--mono);font-size:12px;line-height:1.65;color:rgba(242,233,218,.8);overflow-x:auto;white-space:pre}
  .code .k{color:#d7c8ff}.code .c{color:rgba(242,233,218,.38)}.code .bad{color:var(--before)}.code .good{color:var(--after)}
  .code .del{display:block;background:rgba(232,137,77,.09);margin:0 -16px;padding:0 16px}
  .code .add{display:block;background:rgba(98,217,156,.08);margin:0 -16px;padding:0 16px}
  .prof .row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;margin-top:9px;font-family:var(--mono);font-size:12px;color:rgba(242,233,218,.8)}
  .prof .barw{grid-column:1 / -1;height:7px;border-radius:4px;background:rgba(255,255,255,.06);overflow:hidden}
  .prof .barw i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,var(--before),#f3b184)}
  .prof .row.cold .barw i{background:rgba(242,233,218,.25)}

  /* regressions table (paper) */
  .rtable{width:100%;border-collapse:collapse;font-size:14.5px;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
  .rtable th,.rtable td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top}
  .rtable th{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);background:var(--paper-deep)}
  .rtable tr:last-child td{border-bottom:0}
  .rtable .ok{color:var(--after-ink)} .rtable .bad{color:var(--before-ink);font-weight:600}
  .rtable td:first-child{color:var(--ink-2);min-width:250px}
  .rtable td{min-width:130px}
  @media(max-width:700px){
    .rtable,.rtable tbody,.rtable tr,.rtable td{display:block;width:100%}
    .rtable tr:first-child{display:none}
    .rtable tr{border-bottom:1px solid var(--line)}
    .rtable tr:last-child{border-bottom:0}
    .rtable td{min-width:0;border-bottom:0;padding:4px 16px}
    .rtable td:first-child{padding-top:14px;min-width:0;color:var(--ink)}
    .rtable td:last-child{padding-bottom:14px}
    .rtable td[data-l]::before{content:attr(data-l);display:inline-block;width:112px;font-weight:500;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
  }

  /* proof tiles */
  .proofs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
  @media(max-width:980px){.proofs{grid-template-columns:1fr 1fr}}
  @media(max-width:520px){.proofs{grid-template-columns:1fr}}
  .proof{border-radius:20px;border:1px solid var(--line);background:var(--card);padding:22px 20px 20px;display:flex;flex-direction:column}
  .proof .n{font-weight:800;font-size:clamp(34px,3.6vw,46px);letter-spacing:-.03em;line-height:1}
  .proof .n small{font-size:.5em;font-weight:600;color:var(--muted);letter-spacing:0}
  .proof h4{font-family:var(--display);font-size:20px;font-weight:600;margin-top:12px;letter-spacing:-.01em}
  .proof p{font-size:14px;color:var(--muted);margin-top:6px;line-height:1.5;flex:1}
  .proof .src{font-family:var(--mono);font-size:11px;color:var(--faint);margin-top:12px}
  .proof.hl{border-color:rgba(47,122,82,.45);background:linear-gradient(170deg,#f1f8f2,var(--card))}
  .notproved{margin-top:16px;border:1px dashed var(--line);border-radius:16px;padding:16px 20px;font-size:14.5px;color:var(--ink-2)}
  .notproved b{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:6px;font-weight:500}

  /* lessons */
  .lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
  @media(max-width:980px){.lessons{grid-template-columns:1fr 1fr}}
  @media(max-width:620px){.lessons{grid-template-columns:1fr}}
  .lesson{border-radius:20px;padding:24px 22px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09)}
  .lesson .i{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--before)}
  .lesson h3{font-family:var(--display);font-size:clamp(22px,2.2vw,27px);line-height:1.12;font-weight:600;margin-top:10px;color:#fff;letter-spacing:-.01em}
  .lesson p{font-size:15px;color:rgba(242,233,218,.72);margin-top:10px}

  /* footer */
  .foot{padding:clamp(64px,8vw,104px) 0 90px;background:var(--paper-deep);border-top:1px solid var(--line)}
  .foot h2{font-family:var(--display);font-size:clamp(30px,4vw,48px);font-weight:600;letter-spacing:-.02em;line-height:1.05;max-width:22ch}
  .foot h2 em{color:var(--muted);font-weight:400}
  .credits{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
  @media(max-width:820px){.credits{grid-template-columns:1fr}}
  .credit{border-top:2px solid var(--ink);padding-top:12px}
  .credit .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
  .credit p{font-size:15px;color:var(--ink-2);margin-top:6px}
  .foot .links{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
  .foot .links a{font-family:var(--mono);font-size:13px;text-decoration:none;border:1px solid var(--ink);border-radius:100px;padding:10px 18px;transition:background .18s,color .18s}
  .foot .links a:hover{background:var(--ink);color:var(--paper)}
  .foot .fine{font-family:var(--mono);font-size:11.5px;color:var(--faint);margin-top:34px;max-width:90ch;line-height:1.6}

  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{animation:none!important;transition:none!important}
    html.js .reveal{opacity:1!important;transform:none!important}
    html.js .draw{stroke-dasharray:none!important;stroke-dashoffset:0!important}
  }

/* =====================================================================
   Bend series additions (shared by bend/index.html and the three project
   pages). Everything above this line is the bocht case study's system.
   ===================================================================== */

/* series rail: top of every hero */
.rail{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:34px}
.rail .rl{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:rgba(242,233,218,.5);margin-right:6px}
.rail a{font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;text-decoration:none;color:rgba(242,233,218,.72);border:1px solid rgba(242,233,218,.18);border-radius:100px;padding:5px 12px;background:rgba(255,255,255,.03);transition:border-color .18s,color .18s,background .18s}
.rail a:hover{border-color:rgba(242,233,218,.5);color:#fff}
.rail a .i{color:rgba(242,233,218,.4);margin-right:6px}
.rail a[aria-current="page"]{background:var(--cream);color:#1a130b;border-color:var(--cream)}
.rail a[aria-current="page"] .i{color:rgba(26,19,11,.5)}

/* hero spec object (bocht) */
.spec{position:relative;border-radius:22px;padding:26px 26px 22px;background:linear-gradient(165deg,rgba(255,255,255,.055),rgba(255,255,255,.015));border:1px solid rgba(255,255,255,.1);box-shadow:0 50px 100px -50px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.07)}
.spec .lab{display:flex;justify-content:space-between;gap:10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:rgba(242,233,218,.45)}
.spec .x{font-weight:800;font-size:clamp(56px,7.5vw,96px);line-height:.9;letter-spacing:-.04em;color:#fff;margin-top:22px}
.spec .x small{font-size:.38em;letter-spacing:-.01em;color:rgba(242,233,218,.6);font-weight:600;margin-left:8px}
.spec .c{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(242,233,218,.55);margin-top:10px}
.spec .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.spec .chips span{font-family:var(--mono);font-size:12px;color:rgba(242,233,218,.85);border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);border-radius:8px;padding:6px 10px}
.spec .chips span.k{color:var(--after);border-color:rgba(98,217,156,.3);background:rgba(98,217,156,.06)}
.spec .no{margin-top:20px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.spec .no div{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:rgba(242,233,218,.45)}
.spec .no div b{display:block;font-family:var(--body);font-size:22px;letter-spacing:-.01em;text-transform:none;color:#fff;font-weight:700;margin-bottom:2px}

/* app window frame (shellOS screenshots) */
.win{border-radius:14px;overflow:hidden;background:#0b0c10;border:1px solid rgba(255,255,255,.1);box-shadow:0 50px 100px -48px rgba(0,0,0,.9)}
.win .bar{display:flex;align-items:center;gap:7px;height:30px;padding:0 12px;background:#e9e7e2;color:#5a5650;font-size:12px;font-weight:600}
.win .bar i{width:11px;height:11px;border-radius:50%;display:inline-block}
.win .bar i:nth-child(1){background:#ff5f57}.win .bar i:nth-child(2){background:#febc2e}.win .bar i:nth-child(3){background:#d0d0d4}
.win .bar span{margin-left:8px}
.win img{width:100%;height:auto;display:block}
.cap{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:12px}
.dark .cap,.hero .cap{color:rgba(242,233,218,.5)}
.hero .win{transform:perspective(1600px) rotateY(-7deg) rotateX(2deg);transform-origin:left center}
@media(max-width:920px){.hero .win{transform:none}}

.ba{display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,2.5vw,28px);align-items:start}
@media(max-width:860px){.ba{grid-template-columns:1fr}}
.ba .tagb{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;border-radius:100px;padding:4px 10px;margin-bottom:12px}
.ba .tagb.b{background:#f3e3d6;color:var(--before-ink)}
.ba .tagb.a{background:#dcefe4;color:var(--after-ink)}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,2.5vw,28px);margin-top:clamp(28px,4vw,48px)}
@media(max-width:860px){.shots{grid-template-columns:1fr}}

/* bug cards (shellOS) */
.bugs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:980px){.bugs{grid-template-columns:1fr}}
.bug{border-radius:20px;border:1px solid var(--line);background:var(--card);padding:22px 20px 20px;display:flex;flex-direction:column}
.bug .i{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ember)}
.bug h3{font-family:var(--display);font-weight:600;font-size:23px;line-height:1.15;letter-spacing:-.01em;margin-top:10px}
.bug p{font-size:15px;color:var(--ink-2);margin-top:10px;line-height:1.55}
.bug .fix{margin-top:auto;padding-top:14px;font-family:var(--mono);font-size:12px;color:var(--after-ink);line-height:1.5}
.bug .fix b{color:var(--ink)}

/* "The Bend series" band: bottom of every project page */
.series{padding:clamp(72px,9vw,120px) 0;background:linear-gradient(170deg,#17110a,#0f0b06);color:var(--cream);position:relative;overflow:hidden}
.series::before{content:"";position:absolute;inset:0;background:radial-gradient(50% 60% at 85% 0%,rgba(107,78,194,.22),transparent 60%),radial-gradient(40% 50% at 0% 100%,rgba(232,137,77,.14),transparent 60%);pointer-events:none}
.series .wrap{position:relative}
.series .eyebrow{color:var(--before)}
.series h2{font-family:var(--display);font-weight:600;font-size:clamp(34px,4.8vw,62px);line-height:1.02;letter-spacing:-.02em;margin-top:16px;max-width:20ch}
.series h2 em{font-style:italic;font-weight:400;color:rgba(242,233,218,.55)}
.series .intro{margin-top:20px;max-width:64ch;font-size:clamp(16px,1.4vw,19px);color:rgba(242,233,218,.78);line-height:1.6}
.scards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:clamp(32px,4vw,52px)}
@media(max-width:900px){.scards{grid-template-columns:1fr}}
.scard{position:relative;display:flex;flex-direction:column;border-radius:20px;padding:22px 22px 20px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);text-decoration:none;color:inherit;transition:transform .2s ease,border-color .2s ease,background .2s ease}
a.scard:hover{transform:translateY(-3px);border-color:rgba(242,233,218,.35);background:rgba(255,255,255,.06)}
.scard .n{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:rgba(242,233,218,.5)}
.scard .t{font-family:var(--display);font-weight:600;font-size:30px;letter-spacing:-.02em;line-height:1.05;margin-top:10px}
.scard p{font-size:15px;color:rgba(242,233,218,.75);margin-top:10px;line-height:1.5}
.scard .m{margin-top:auto;padding-top:16px;display:flex;flex-wrap:wrap;gap:6px}
.scard .m span{font-family:var(--mono);font-size:11px;color:rgba(242,233,218,.7);border:1px solid rgba(255,255,255,.12);border-radius:6px;padding:3px 7px}
.scard .go{font-family:var(--mono);font-size:12px;color:var(--before);margin-top:14px}
.scard.here{background:rgba(242,233,218,.08);border-color:rgba(242,233,218,.4)}
.scard.here .go{color:rgba(242,233,218,.55)}
.series .all{display:inline-flex;margin-top:28px;font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;color:var(--cream);text-decoration:none;border:1px solid rgba(242,233,218,.3);border-radius:100px;padding:9px 16px}
.series .all:hover{border-color:var(--cream)}

/* series hub: project tiles */
.ptiles{display:grid;gap:clamp(22px,3vw,34px)}
.ptile{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(22px,3.5vw,48px);align-items:center;border-radius:28px;padding:clamp(22px,3.5vw,44px);background:linear-gradient(160deg,#1c150c,#0f0b06);color:var(--cream);border:1px solid rgba(255,255,255,.06);box-shadow:0 60px 120px -70px rgba(20,16,9,.9);overflow:hidden;position:relative}
.ptile::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 70% at 100% 0%,var(--glow,rgba(107,78,194,.28)),transparent 60%);pointer-events:none}
.ptile>*{position:relative}
.ptile.flip{grid-template-columns:1.15fr 1fr}
.ptile.flip .ptext{order:2}
@media(max-width:900px){.ptile,.ptile.flip{grid-template-columns:1fr}.ptile.flip .ptext{order:0}}
.ptile .n{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--before)}
.ptile h3{font-family:var(--display);font-weight:600;font-size:clamp(40px,5.2vw,68px);line-height:.95;letter-spacing:-.03em;margin-top:12px}
.ptile .tl2{font-family:var(--display);font-size:clamp(20px,2vw,25px);line-height:1.25;margin-top:14px;color:#fff;max-width:26ch}
.ptile .tl2 em{color:var(--before)}
.ptile p{font-size:15.5px;color:rgba(242,233,218,.76);margin-top:14px;line-height:1.55;max-width:52ch}
.ptile .pills{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.ptile .pills span{font-family:var(--mono);font-size:11px;color:rgba(242,233,218,.8);border:1px solid rgba(255,255,255,.14);border-radius:6px;padding:3px 8px}
.ptile .kv{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:8px 28px;margin-top:22px}
.ptile .kv b{display:block;font-size:24px;font-weight:800;letter-spacing:-.02em;color:#fff;line-height:1}
.ptile .kv span{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:rgba(242,233,218,.5)}
.ptile .open{display:inline-flex;margin-top:24px;font-family:var(--mono);font-size:12.5px;color:#1a130b;background:var(--cream);border-radius:100px;padding:9px 16px;text-decoration:none;font-weight:500}
.ptile .open:hover{background:#fff}
.ptile .pshot{border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,.1);box-shadow:0 40px 80px -40px rgba(0,0,0,.9);transform:perspective(1600px) rotateY(-6deg);transform-origin:left center}
.ptile.flip .pshot{transform:perspective(1600px) rotateY(6deg);transform-origin:right center}
@media(max-width:900px){.ptile .pshot,.ptile.flip .pshot{transform:none}}
.ptile .pshot img{width:100%;height:auto;display:block}

/* hub: method row + findings */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{border:1px solid var(--line);border-radius:18px;background:var(--card);padding:20px 18px}
.step .who{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink)}
.step h4{font-family:var(--display);font-size:22px;font-weight:600;margin-top:8px;letter-spacing:-.01em}
.step p{font-size:14.5px;color:var(--ink-2);margin-top:8px;line-height:1.5}
.langfacts{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:clamp(28px,3.5vw,44px)}
@media(max-width:900px){.langfacts{grid-template-columns:1fr 1fr}}
.lf{border-top:2px solid var(--ink);padding-top:12px}
.lf .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.lf p{font-size:15px;color:var(--ink-2);margin-top:8px;line-height:1.5}
.hero .wrap>.rail{grid-column:1/-1;margin-bottom:6px}
.facts.one{grid-template-columns:1fr}
.ptile .open.ghost{background:transparent;color:var(--cream);border:1px solid rgba(242,233,218,.35);margin-left:8px}