/* Endogen brand: Signal (see Brand/Brand Guidelines.md) */
:root {
  --night: #0D1117; --scope: #070A0E; --graticule: #273345; --grid: #1C2532;
  --frost: #E8EDF2; --text: #C3CCD6; --mist: #8B96A3;
  --phosphor: #33FF33; --amber: #FFB547;
}
* { box-sizing: border-box; }
html { background: var(--night); }
body {
  margin: 0; background: var(--night); color: var(--text);
  font: 400 17px/26px "Space Grotesk", system-ui, sans-serif;
}
a { color: var(--phosphor); text-underline-offset: 3px; }
a:hover { color: var(--frost); }

.site-header {
  border-bottom: 1px solid var(--graticule);
  background-color: var(--night);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
}
.site-header .bar {
  max-width: 760px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.site-header .logo { display: block; line-height: 0; }
.site-header nav { display: flex; gap: 24px; font-weight: 500; }
.site-header nav a { color: var(--frost); text-decoration: none; }
.site-header nav a:hover { color: var(--phosphor); }

main { max-width: 760px; margin: 0 auto; padding: 56px 20px 48px; }
h1, h2, h3 { color: var(--frost); font-weight: 700; }
h1 { font-size: 48px; line-height: 54px; letter-spacing: -0.02em; margin: 0 0 14px; }
h2 { font-size: 24px; line-height: 32px; letter-spacing: -0.01em; margin: 40px 0 10px; }
h3 { font-size: 20px; line-height: 28px; font-weight: 500; margin: 28px 0 8px; }
p { margin: 0 0 14px; }
strong { color: var(--frost); }
.lede { font-size: 20px; line-height: 30px; color: var(--frost); max-width: 34em; }
.meta, main > p:first-child {
  font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px; line-height: 20px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--mist);
}
ul { padding-left: 1.2em; margin: 0 0 14px; }
li { margin-bottom: 6px; }
li::marker { color: var(--phosphor); }
.apps { list-style: none; padding: 0; }
.apps li { border-top: 1px solid var(--graticule); padding: 16px 0; margin: 0; }
.apps li:last-child { border-bottom: 1px solid var(--graticule); }
.apps a { font-weight: 700; font-size: 20px; }
hr { border: 0; border-top: 1px solid var(--graticule); margin: 56px 0 20px; }
footer { color: var(--mist); font-size: 14px; line-height: 20px; }
footer a { color: var(--mist); }
footer a:hover { color: var(--phosphor); }
code { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 0.9em; color: var(--frost); }

@media (max-width: 560px) {
  h1 { font-size: 36px; line-height: 42px; }
  main { padding-top: 40px; }
}