:root {






  --ink:   #b4b9c9;      
  --body:  #a5aaba;      
  --soft:  #868a93;      
  --dim:   #7a7e87;      
  --faint: #7a7e87;

  --line:   #1e1e23;
  --line-2: #2a2a30;
  --line-3: #3a3a43;
  --hair:     var(--line);      

  --purple: linear-gradient(180deg, #8b30ef 0%, #6b27d6 38%, #55199f 72%, #45128c 100%);
  --purple-rgb: 107, 39, 214;
  --up: #2ee6a8;
  --down: #f2554a;
  --gold: #e8bd78;            
  --focus: #22d3ee;

  --r-ctl: 10px;
  --sans: "Segoe UI Variable Text", "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
  --display: "Segoe UI Variable Display", "Segoe UI Variable Text", "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --gutter: clamp(16px, 4vw, 56px);
}

*, *::before, *::after { box-sizing: border-box; }

html { background: #000; color-scheme: dark; scrollbar-color: var(--line-2) #000; }
body {
  margin: 0;
  background: var(--z-ground, #000);
  color: var(--body);
  font: 400 16px/1.72 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: rgba(var(--purple-rgb), .6); color: var(--ink); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }


.wrap { width: min(100% - 40px, 720px); margin-inline: auto; }
.top .wrap, footer .wrap {
  width: 100%; max-width: 1320px;
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}


.top {
  position: sticky; top: 0; z-index: 40; height: 64px; display: flex; align-items: center;
  background: #000;             

  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 26px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px; margin-right: auto; text-decoration: none;
  color: var(--ink); font: 650 1.0625rem/1 var(--display); letter-spacing: -.015em;
}
.brand img { width: 26px; height: 26px; }
.top nav { display: flex; align-items: center; gap: 26px; }
.top nav a:not(.btn) { color: var(--soft); text-decoration: none; font-size: .9375rem; transition: color .2s; }
.top nav a:not(.btn):hover { color: var(--ink); }


.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  min-height: 44px; padding: 0 1.1em; border: 0; border-radius: var(--r-ctl);
  background: linear-gradient(180deg, #0b0910 0%, #050409 100%);
  color: var(--body);
  font: 600 .9375rem/1 var(--sans);   
  letter-spacing: -.005em; text-decoration: none; white-space: nowrap; cursor: pointer;
  box-shadow: inset 0 0 0 1px var(--line-2);
  transition: box-shadow .3s var(--ease), color .2s, background-color .2s, transform .12s;
}
.btn:active { transform: translateY(1px); }
.btn-key { color: var(--ink); box-shadow: inset 0 0 0 1px rgba(var(--purple-rgb), .8); }
@media (hover: hover) {
  .btn:hover { color: var(--ink); box-shadow: inset 0 0 0 1px var(--line-3); }
  .btn-key:hover {
    background: linear-gradient(180deg, rgba(var(--purple-rgb), .2), rgba(12, 8, 22, .92));
    box-shadow: inset 0 0 0 1px rgba(139, 48, 239, .95), 0 6px 26px -8px rgba(var(--purple-rgb), .7);
  }
}
.btn-lg { min-height: 52px; padding: 0 1.45em; font-size: 1rem; }


.doc { padding: 72px 0 96px; }

h1 {
  margin: 0 0 14px; color: var(--ink);
  font: 650 clamp(2rem, 1.2rem + 3vw, 3rem)/1.04 var(--display); letter-spacing: -.034em;
  text-wrap: balance;
}
.updated { margin: 0 0 40px; font-size: 13.5px; color: var(--dim); }
.updated b { color: var(--gold); font-weight: 600; }

h2 {
  margin: 44px 0 12px; color: var(--ink);
  font: 650 1.25rem/1.25 var(--display); letter-spacing: -.02em; text-wrap: balance;
}
p { margin: 0 0 14px; max-width: 68ch; text-wrap: pretty; }
b { color: var(--ink); font-weight: 600; }
a { color: inherit; text-underline-offset: .22em; text-decoration-thickness: 1px; }
img { max-width: 100%; height: auto; display: block; }

ul { margin: 0 0 14px; padding: 0; list-style: none; max-width: 68ch; }
li {
  position: relative; padding-left: 22px; margin-bottom: 9px;
  font-size: 15.5px; color: var(--soft); text-wrap: pretty;
}


li::before {
  content: ""; position: absolute; left: 4px; top: .6em;
  width: 5px; height: 11px; border-radius: 1px; transform: skewX(-24deg);
  background: var(--purple);
}


.warn {
  margin: 0 0 36px; padding: 22px 24px 10px; border-radius: var(--r-ctl);
  border: 1px solid rgba(242, 85, 74, .28);
  background: rgba(242, 85, 74, .05);
}
.warn h2 { margin: 0 0 10px; font-size: 1.0625rem; }
.warn p:last-child { margin-bottom: 12px; }
.warn.ok {
  border-color: rgba(46, 230, 168, .26);
  background: rgba(46, 230, 168, .045);
}

.todo { position: relative; padding-left: 22px; color: var(--dim); font-size: 14px; }
.todo::before { content: "\2022"; position: absolute; left: 6px; color: var(--faint); }

.foot-note {
  margin: 44px 0 0; padding-top: 22px; border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--dim);
}
.foot-note b { color: var(--soft); }


footer {
  border-top: 1px solid var(--line);
  padding-block: 18px max(26px, env(safe-area-inset-bottom));
  color: var(--dim); font-size: .875rem;
}
footer .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 0 26px; }
footer .brand { margin-right: 0; font-size: .9375rem; }
footer .brand img { width: 20px; height: 20px; }
footer nav { display: flex; flex-wrap: wrap; gap: 0 22px; }





footer nav a {
  color: var(--soft); text-decoration: none;
  padding-block: 12px; display: inline-flex; align-items: center;
}
footer nav a:hover { color: var(--ink); }


.center {
  min-height: calc(100vh - 64px - 72px);
  min-height: calc(100dvh - 64px - 72px);
  display: grid; place-items: center; padding: 48px 20px 72px; text-align: center;
}
.center .box { width: min(100%, 540px); }
.center h1 { margin-bottom: 12px; }
.center p { margin-inline: auto; max-width: 46ch; color: var(--soft); }
.center .row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }
.center .mark { width: 54px; height: 54px; margin: 0 auto 22px; opacity: .92; }



.flat { display: block; width: min(100%, 300px); height: 40px; margin: 0 auto 26px; overflow: visible; }
.flat line { stroke: var(--line-3); stroke-width: 1.5; stroke-dasharray: 3 6; }
.flat circle { fill: #000; stroke: var(--soft); stroke-width: 2; }




@media (max-width: 640px) {
  .top .wrap { gap: 12px; }
  .top nav a:not(.btn) { display: none; }
  .doc { padding: 48px 0 64px; }
  h2 { margin-top: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:active { transform: none; }
}