:root{color-scheme:dark;--bg:#0E0D12;--bg2:#16141C;--bg3:#211E2A;--line:rgba(243,239,232,.09);--line2:rgba(243,239,232,.18);--ink:#F3EFE8;--mut:#ABA5B7;--ph:#77718A;--coral:#FF5A47;--coral2:#FF8C7C;--ct:#FF5A47;--lilac:#B7AEFF;--lt:#B7AEFF;--on:#1B0D0A;--glass:rgba(22,20,28,.95);--navbg:rgba(14,13,18,.74);--tint:rgba(255,255,255,.04);--grid:rgba(243,239,232,.08);--dots:rgba(243,239,232,.28);--stroke:rgba(243,239,232,.22);--shade:rgba(0,0,0,.85);--device:#09080C;--deep:#1B0D0A;--mx:0;--my:0;--sp:0;--R:128px;--gap:52px}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){color-scheme:light;--bg:#F5F1E8;--bg2:#FFFDF8;--bg3:#E9E3D6;--line:rgba(23,21,28,.10);--line2:rgba(23,21,28,.20);--ink:#17151C;--mut:#5C5666;--ph:#8A8494;--coral2:#FF7563;--ct:#C4331F;--lilac:#A79CFF;--lt:#5646D0;--glass:rgba(255,253,248,.95);--navbg:rgba(245,241,232,.82);--tint:rgba(23,21,28,.045);--grid:rgba(23,21,28,.09);--dots:rgba(23,21,28,.25);--stroke:rgba(23,21,28,.20);--shade:rgba(70,45,20,.25);--device:#17151C;--deep:#7A1A0E}
  :root:not([data-theme="dark"]) .ic-sun{display:none}
  :root:not([data-theme="dark"]) .ic-moon{display:block}
}
:root[data-theme="light"]{color-scheme:light;--bg:#F5F1E8;--bg2:#FFFDF8;--bg3:#E9E3D6;--line:rgba(23,21,28,.10);--line2:rgba(23,21,28,.20);--ink:#17151C;--mut:#5C5666;--ph:#8A8494;--coral2:#FF7563;--ct:#C4331F;--lilac:#A79CFF;--lt:#5646D0;--glass:rgba(255,253,248,.95);--navbg:rgba(245,241,232,.82);--tint:rgba(23,21,28,.045);--grid:rgba(23,21,28,.09);--dots:rgba(23,21,28,.25);--stroke:rgba(23,21,28,.20);--shade:rgba(70,45,20,.25);--device:#17151C;--deep:#7A1A0E}
:root[data-theme="light"] .ic-sun{display:none}
:root[data-theme="light"] .ic-moon{display:block}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Instrument Sans",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:#FF5A47}a:hover{color:#FF8C7C}
::selection{background:#FF5A47;color:#1B0D0A}
.page{position:relative;width:100%;min-height:100%;overflow-x:clip;background:var(--bg);color:var(--ink)}
.page a{color:var(--ct)}
.wrap{width:100%;max-width:1280px;margin:0 auto}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace}
section{scroll-margin-top:72px}
ul,ol{list-style:none;margin:0;padding:0}

/* theme switch: radial light */
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}
:root.vt-off::view-transition-old(root){z-index:9999}
:root.vt-off::view-transition-new(root){z-index:1}


/* legal page */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:var(--navbg);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.page .logo{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;color:var(--ink);font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:22px;letter-spacing:-.03em}
.page .logo:hover{color:var(--ink)}
.logo .br{font-family:"JetBrains Mono",monospace;font-weight:500;color:var(--mut);font-size:19px}
.logo .lv{color:var(--ct)}
.navr{display:flex;align-items:center;gap:8px}
.icb{width:46px;height:46px;border-radius:14px;border:1px solid var(--line2);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;padding:0}
.icb:hover{border-color:var(--ink)}
.icb svg{width:22px;height:22px}
.tgl svg{animation:iconin .55s cubic-bezier(.2,.9,.2,1.2) both}
.ic-moon{display:none}
.page .back{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 16px;border-radius:14px;border:1px solid var(--line2);color:var(--ink);text-decoration:none;font-size:15px;font-weight:600}
.page .back:hover{border-color:var(--ink);color:var(--ink)}
.back svg{width:18px;height:18px}
.back .lbl{display:none}
.hero{position:relative;padding:112px 20px 36px;display:flex;flex-direction:column;gap:26px;overflow:clip}
.hcopy{position:relative;z-index:2;display:flex;flex-direction:column;gap:16px}
.kick{margin:0;font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--ct);letter-spacing:.04em;display:flex;gap:10px;align-items:center}
.kick::before{content:"";width:26px;height:1px;background:var(--ct)}
.h1{margin:0;font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:clamp(46px,13vw,104px);line-height:.95;letter-spacing:-.045em}
.h1 .c{color:var(--ct)}
.meta{display:flex;flex-wrap:wrap;gap:8px}
.meta span{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--mut);padding:7px 12px;border-radius:999px;border:1px solid var(--line2)}
.intro{margin:0;color:var(--mut);font-size:17.5px;line-height:1.6;max-width:56ch}
.doc3d{position:relative;height:230px;perspective:900px;display:grid;place-items:center}
.stackd{position:relative;width:160px;height:200px;transform-style:preserve-3d;animation:dsway 9s ease-in-out infinite}
.sheet{position:absolute;inset:0;border-radius:16px;background:var(--bg2);border:1px solid var(--line2);box-shadow:0 30px 50px -24px var(--shade);padding:22px 18px;display:flex;flex-direction:column;gap:9px}
.sheet:nth-child(1){transform:translateZ(-50px) translate(-26px,14px) rotate(-8deg)}
.sheet:nth-child(2){transform:translateZ(-25px) translate(-12px,6px) rotate(-3deg)}
.sheet:nth-child(3){transform:translateZ(0)}
.sheet i{display:block;height:7px;border-radius:4px;background:var(--line2)}
.sheet i:nth-child(1){width:55%;height:10px;background:var(--ink);opacity:.8}
.sheet i:nth-child(3){width:80%}.sheet i:nth-child(5){width:65%}
.badge{position:absolute;right:-28px;bottom:-22px;width:84px;height:84px;border-radius:50%;background:var(--coral);color:#1B0D0A;display:grid;place-items:center;transform:translateZ(60px);box-shadow:0 20px 34px -12px rgba(255,90,71,.8)}
.badge svg{width:38px;height:38px}
.tldr{margin:0 20px;padding:20px;border-radius:24px;background:var(--bg2);border:1px solid rgba(255,90,71,.45);display:flex;flex-direction:column;gap:14px}
.tldr h2{margin:0;font-family:"JetBrains Mono",monospace;font-weight:500;font-size:13px;color:var(--ct);letter-spacing:.04em}
.tldr ul{display:grid;gap:12px}
.tldr li{display:flex;gap:12px;align-items:flex-start;font-size:16px;line-height:1.45}
.tldr li svg{width:22px;height:22px;flex-shrink:0;color:var(--ct);margin-top:1px}
.body{padding:40px 20px 80px;display:flex;flex-direction:column;gap:28px}
.toc{border:1px solid var(--line2);border-radius:18px;background:var(--bg2)}
.toc summary{list-style:none;cursor:pointer;min-height:52px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;font-weight:600}
.toc summary::-webkit-details-marker{display:none}
.toc summary svg{width:18px;height:18px;transition:transform .3s}
.toc[open] summary svg{transform:rotate(180deg)}
.toc ol{padding:0 10px 12px;display:flex;flex-direction:column}
.page .toc a{display:flex;gap:10px;align-items:baseline;min-height:40px;padding:9px 8px;border-radius:10px;color:var(--ink);text-decoration:none;font-size:15px}
.page .toc a:hover{background:var(--tint);color:var(--ct)}
.toc a span{font-family:"JetBrains Mono",monospace;font-size:11.5px;color:var(--ct)}
.art{display:flex;flex-direction:column;gap:14px;max-width:70ch}
.sec{scroll-margin-top:84px;padding:22px 0 8px;border-top:1px solid var(--line)}
.sec:first-child{border-top:0;padding-top:0}
.sec h2{margin:0 0 10px;display:flex;gap:12px;align-items:baseline;font-family:"Bricolage Grotesque",sans-serif;font-weight:700;font-size:27px;letter-spacing:-.025em;line-height:1.15}
.sec h2 span{font-family:"JetBrains Mono",monospace;font-weight:400;font-size:13px;color:var(--ct)}
.sec h3{margin:18px 0 6px;font-size:17px;font-weight:600}
.sec p,.sec li{color:var(--mut);font-size:16px;line-height:1.65}
.sec p{margin:0 0 12px}
.sec ul.dots{display:flex;flex-direction:column;gap:8px;margin:0 0 12px}
.sec ul.dots li{position:relative;padding-left:20px}
.sec ul.dots li::before{content:"";position:absolute;left:2px;top:.65em;width:7px;height:7px;border-radius:50%;background:var(--coral)}
.sec strong{color:var(--ink);font-weight:600}
.card{padding:16px 18px;border-radius:16px;background:var(--bg2);border:1px solid var(--line2);margin:0 0 12px}
.card p:last-child{margin-bottom:0}
.tw{overflow-x:auto;margin:4px 0 14px;border:1px solid var(--line2);border-radius:16px}
table{width:100%;border-collapse:collapse;min-width:520px;font-size:14.5px}
th,td{text-align:left;vertical-align:top;padding:12px 14px;border-bottom:1px solid var(--line)}
th{font-family:"JetBrains Mono",monospace;font-weight:500;font-size:12px;color:var(--ct);background:var(--bg2);letter-spacing:.03em}
td{color:var(--mut);line-height:1.5}
td:first-child{color:var(--ink);font-weight:500}
tr:last-child td{border-bottom:0}
code{font-family:"JetBrains Mono",monospace;font-size:.9em;padding:2px 7px;border-radius:6px;background:var(--tint);color:var(--ink)}
.ph{color:var(--ct);font-family:"JetBrains Mono",monospace;font-size:.92em}
.page .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 20px;border-radius:999px;font:inherit;font-weight:600;font-size:15px;text-decoration:none;cursor:pointer;border:1px solid var(--line2);background:transparent;color:var(--ink)}
.page .btn:hover{border-color:var(--coral);color:var(--ct)}
.done{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--ct);margin-left:10px}
.foot{border-top:1px solid var(--line);padding:32px 20px 40px;display:flex;flex-direction:column;gap:16px}
.foot p{margin:0;color:var(--mut);font-size:13.5px;line-height:1.6}
.flinks{display:flex;flex-wrap:wrap;gap:6px 20px}
.page .flinks a{display:inline-flex;align-items:center;min-height:40px;color:var(--ink);text-decoration:none;font-size:15px}
.page .flinks a:hover{color:var(--ct)}
@keyframes iconin{from{opacity:0;transform:rotate(-120deg) scale(.4)}to{opacity:1;transform:none}}
@keyframes dsway{0%,100%{transform:rotateX(14deg) rotateY(-22deg)}50%{transform:rotateX(6deg) rotateY(18deg)}}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.hcopy > *{animation:rise .8s cubic-bezier(.2,.8,.2,1) both}
.hcopy > *:nth-child(2){animation-delay:.08s}.hcopy > *:nth-child(3){animation-delay:.16s}.hcopy > *:nth-child(4){animation-delay:.24s}
@supports (animation-timeline: view()){
  .sec{animation:secin linear both;animation-timeline:view();animation-range:entry 0% cover 22%}
}
@keyframes secin{from{opacity:0;transform:perspective(900px) translateY(40px) rotateX(-18deg)}to{opacity:1;transform:none}}
@media (min-width:700px){
  .nav{padding:14px 32px}
  .back .lbl{display:inline}
  .hero{padding:130px 40px 44px;flex-direction:row;align-items:center;gap:40px}
  .hcopy{flex:1 1 0;min-width:0}
  .doc3d{flex:0 0 280px;height:300px}
  .tldr{margin:0 40px;padding:26px}
  .body{padding:48px 40px 96px}
  .foot{padding:36px 40px 48px}
}
@media (min-width:1100px){
  .nav{padding:14px 48px}
  .hero,.body{max-width:1280px;margin-left:auto;margin-right:auto;padding-left:56px;padding-right:56px}
  .tldr{max-width:1168px;margin:0 auto}
  .tldr ul{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
  .body{display:grid;grid-template-columns:260px minmax(0,1fr);gap:64px;align-items:start}
  .toc{position:sticky;top:96px;background:transparent;border:0}
  .toc summary{pointer-events:none;padding:0 8px;font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--mut);font-weight:400;min-height:32px}
  .toc summary svg{display:none}
  .toc ol{padding:0}
  .doc3d{flex-basis:340px;height:340px}
  .stackd{width:200px;height:250px}
  .foot{max-width:1280px;margin:0 auto;padding:40px 56px 56px;flex-direction:row;justify-content:space-between;align-items:center}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}