:root{
  color-scheme:dark;
  --ink:#f4f4f4;
  --paper:#161616;
  --rule:#393939;
  --muted:#a8a8a8;
  --mark:#ffffff;
  --hover:#262626;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

.sheet{
  max-width:38rem;
  margin:0 auto;
  padding:4.5rem 1.75rem 4rem;
}


/* ---------- masthead ---------- */

h1{
  font-size:1.6rem;
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 0.6rem;
}

.role{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.72rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0;
}

.lede{
  margin:1.2rem 0 0;
  font-size:1rem;
  color:var(--ink);
  max-width:32rem;
}

/* ---------- back link ---------- */

.back{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.7rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--muted);
  text-decoration:none;
  display:inline-block;
  margin-bottom:2rem;
}

.back:hover{color:var(--ink)}

/* ---------- index ---------- */

.index{
  margin-top:0;
  border-top:1px solid var(--rule);
}

.entry{
  text-decoration:none;
  color:inherit;
  border-bottom:1px solid var(--rule);
  padding:1rem 0;
  display:grid;
  grid-template-columns:2.6rem 1fr;
  gap:0 1rem;
  align-items:baseline;
  transition:background 120ms ease;
}

.entry:hover,
.entry:focus-visible{
  background:var(--hover);
  outline:none;
}

.entry:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:-2px;
}

.num{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.72rem;
  color:var(--muted);
  letter-spacing:0.02em;
}

.entry h2{
  font-size:1.05rem;
  font-weight:600;
  margin:0;
  letter-spacing:-0.005em;
}

.entry p{
  grid-column:2;
  margin:0.25rem 0 0;
  font-size:0.92rem;
  color:var(--muted);
  line-height:1.5;
}

.entry .arrow{
  display:inline-block;
  margin-left:0.45rem;
  color:var(--ink);
  opacity:0;
  transform:translateX(-4px);
  transition:opacity 120ms ease, transform 120ms ease;
}

.entry:hover .arrow,
.entry:focus-visible .arrow{
  opacity:1;
  transform:translateX(0);
}

/* ---------- index groups ---------- */

.index-label{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.7rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--muted);
  margin:2.4rem 0 0.5rem;
}

.entry.feature{
  grid-template-columns:1fr;
}

.entry.feature p{
  grid-column:1;
  margin-top:0.25rem;
}

/* ---------- inner pages ---------- */

.page h1{
  margin-bottom:1.4rem;
}

.page h2{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.7rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--muted);
  font-weight:400;
  margin:2.4rem 0 0.9rem;
  padding-top:1.2rem;
  border-top:1px solid var(--rule);
}

.page h2:first-of-type{margin-top:2rem}

.page h3{
  font-size:1rem;
  font-weight:600;
  margin:1.5rem 0 0.2rem;
}

.page h3 + .meta{
  font-family:"IBM Plex Mono",monospace;
  font-size:0.72rem;
  letter-spacing:0.02em;
  color:var(--muted);
  margin:0 0 0.6rem;
}

.page p{margin:0 0 0.9rem;max-width:34rem}

.page ul{
  margin:0 0 1rem;
  padding-left:1.1rem;
  max-width:34rem;
}

.page li{margin-bottom:0.3rem}

.page a{
  color:var(--ink);
  text-decoration:underline;
  text-underline-offset:0.15em;
  text-decoration-thickness:1px;
  text-decoration-color:var(--rule);
}

.page a:hover{text-decoration-color:var(--ink)}

.stack{
  list-style:none;
  margin:0 0 1rem;
  padding:0;
  font-family:"IBM Plex Mono",monospace;
  font-size:0.75rem;
  letter-spacing:0.02em;
  color:var(--muted);
  line-height:1.9;
}

.note{
  font-size:0.9rem;
  color:var(--muted);
}

/* ---------- credentials (home) ---------- */

.creds{
  margin-top:2rem;
}

.creds .index-label{
  margin:1.4rem 0 0.4rem;
}

.creds .index-label:first-child{
  margin-top:0;
}

.creds ul{
  list-style:none;
  margin:0;
  padding:0;
  font-family:"IBM Plex Mono",monospace;
  font-size:0.72rem;
  letter-spacing:0.02em;
  color:var(--muted);
  line-height:2;
}

/* ---------- footer ---------- */

footer{
  margin-top:2.6rem;
  padding-top:1.4rem;
  border-top:1px solid var(--rule);
  font-size:0.9rem;
  color:var(--muted);
}

footer a{
  color:var(--ink);
  text-decoration:underline;
  text-underline-offset:0.15em;
  text-decoration-thickness:1px;
  text-decoration-color:var(--rule);
}

footer a:hover{text-decoration-color:var(--ink)}

footer .copyright{
  margin:1rem 0 0;
  font-family:"IBM Plex Mono",monospace;
  font-size:0.68rem;
  letter-spacing:0.02em;
  color:var(--muted);
}

@media (max-width:480px){
  .sheet{padding:3.5rem 1.35rem 3.5rem}
  .entry{grid-template-columns:2rem 1fr}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important}
}