:root {
  --bg: #0d1117;
  --bg2: #141b24;
  --panel: #18212c;
  --line: #2a3644;
  --text: #e6e9ee;
  --muted: #9aa6b4;
  --ours: #ff6b5a;
  --nit: #4fc3f7;
  --peri: #a99bff;
  --new: #ffc857;
  --good: #6ee7a8;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
}

a { color: var(--nit); }
a:hover { color: #8fdcff; }

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.top nav {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem 1.1rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}
.top nav a[aria-current] { text-decoration: underline; text-decoration-color: var(--ours);
  text-decoration-thickness: 2px; text-underline-offset: 7px; }
.top nav .short, .top nav .br { display: none; }
/* Phones: brand and the GitHub link on the first row, then every section on the second (short labels), nothing
   hidden behind a scroll. */
@media (max-width: 560px) {
  .top nav { gap: 0.35rem 1rem; padding-block: 0.55rem 0.6rem; }
  .top nav .home { order: 0; }
  .top nav .ext { order: 1; }
  .top nav .br { display: block; order: 2; flex-basis: 100%; height: 0; }
  .top nav a:not(.home):not(.ext) { order: 3; }
  .top nav .long { display: none; }
  .top nav .short { display: inline; }
}
.pager { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 4rem;
  padding-top: 1.2rem; border-top: 1px solid var(--line); }
.pager a { display: grid; gap: 2px; text-decoration: none; max-width: 48%; }
.pager a.next { margin-left: auto; text-align: right; }
.pager .dir { font: 0.75rem/1.2 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.pager .t { font-weight: 600; font-size: 1.05rem; color: var(--nit); }
.pager a:hover .t { text-decoration: underline; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current] { color: var(--text); }
.top nav .home { color: var(--text); font-weight: 600; margin-right: auto; }

main { max-width: 62rem; margin: 0 auto; padding: 0 1rem 5rem; }

.prose { max-width: 42rem; }
.prose p, .prose li { color: #d5dae1; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h2 { margin: 3.5rem 0 0.8rem; font-size: 1.6rem; }
h3 { margin: 2rem 0 0.5rem; font-size: 1.15rem; }

.hero { padding: 3.5rem 0 1rem; }
.kicker { color: var(--muted); font: 0.85rem var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.hero h1 { font-size: clamp(2.3rem, 7vw, 4.2rem); margin: 0.4rem 0 0.6rem; }
.hero h1 .t { color: var(--ours); font-family: var(--mono); font-weight: 700; }
.hero .lede { font-size: 1.2rem; color: #cfd5dd; max-width: 44rem; }
.byline { color: var(--muted); font-size: 0.92rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 0.75rem;
  margin: 2rem 0 1rem;
}
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 0.9rem 1rem; }
.stat .v { font: 700 1.6rem/1.2 var(--mono); }
.stat .l { color: var(--muted); font-size: 0.88rem; }
.v.ours { color: var(--ours); }
.v.nit { color: var(--nit); }

.note {
  border-left: 3px solid var(--new);
  background: var(--bg2);
  padding: 0.7rem 1rem;
  border-radius: 0 8px 8px 0;
  color: #d5dae1;
  font-size: 0.95rem;
  max-width: 44rem;
}

.fig {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  margin: 1.4rem 0;
  position: relative;
}
.fig .cap { color: var(--muted); font-size: 0.88rem; margin-top: 0.6rem; }
.fig svg, .fig canvas { display: block; width: 100%; }
.fig h4 { margin: 0 0 0.6rem; font-size: 1rem; }

.legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; font-size: 0.88rem; color: var(--muted); margin-bottom: 0.5rem; }
.legend i { display: inline-block; width: 0.8rem; height: 0.8rem; border-radius: 3px; margin-right: 0.35rem; vertical-align: -0.1rem; }

.controls { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; margin: 0.6rem 0; font-size: 0.92rem; }
.controls label { color: var(--muted); display: inline-flex; align-items: center; gap: 0.45rem; }
button, select {
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
button:hover, select:hover { border-color: #3d4d60; }
button.on { border-color: var(--ours); color: var(--ours); }
input[type=range] { accent-color: var(--ours); width: 11rem; max-width: 100%; }

.readout { font-family: var(--mono); font-size: 0.9rem; }
.readout b { font-weight: 700; }
.ok { color: var(--good); }
.bad { color: var(--ours); }

.tip {
  position: fixed;
  pointer-events: none;
  background: #0b0f14;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  line-height: 1.4;
  max-width: 21rem;
  z-index: 50;
  display: none;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

.cells { display: flex; flex-wrap: wrap; gap: 3px; margin: 0.6rem 0; }
.cells span {
  font: 0.72rem var(--mono);
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
  background: var(--bg2);
  border: 1px solid var(--line);
  color: var(--muted);
}
.cells span.hit { border-color: var(--new); color: var(--new); }

table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
th, td { text-align: left; padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 2.6rem; background: var(--panel); cursor: pointer; }
td.n { font-family: var(--mono); text-align: right; white-space: nowrap; }
.scroll { overflow-x: auto; }

code { font-family: var(--mono); font-size: 0.88em; background: var(--bg2); padding: 0.05rem 0.3rem; border-radius: 4px; }

.pill { display: inline-block; font-size: 0.75rem; padding: 0.05rem 0.45rem; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }

footer { color: var(--muted); font-size: 0.88rem; margin-top: 4rem; border-top: 1px solid var(--line); padding-top: 1rem; }

select { max-width: 100%; }
#ghostSel { flex: 1 1 18rem; min-width: 0; }
.readout, code { overflow-wrap: anywhere; }
body { overflow-x: hidden; }

.video video { width: 100%; display: block; border-radius: 8px; background: #000; aspect-ratio: 16 / 9; }
.video iframe.yt { width: 100%; display: block; border: 0; border-radius: 8px; background: #000; aspect-ratio: 4 / 3; }
.lab { display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 1rem; margin: 1rem 0 0; }
.lab figure { margin: 0; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.lab video { width: 100%; display: block; background: #000; }
.lab figcaption { padding: 0.7rem 0.85rem 0.85rem; font-size: 0.88rem; color: #cfd5dd; }
.lab figcaption b { display: block; color: var(--text); margin-bottom: 0.2rem; font-size: 0.95rem; }
.lab .pill { margin-left: 0.3rem; vertical-align: 0.1rem; }
.pill.cheat { border-color: var(--new); color: var(--new); }
.pill.real { border-color: var(--good); color: var(--good); }

/* in-page links: stop below the sticky nav instead of under it */
[id] { scroll-margin-top: 4.5rem; }