/* Base tokens and chrome shared with the c3nsor site (michael-peterson.com/IS-581). */
:root {
  --ink: #101010;
  --paper: #fff;
  --accent: #b42318;
  --line: #d8d8d8;
  --muted: #707070;
  --body: #444;
  --header-h: 88px;
}
* { box-sizing: border-box; }
html {
  background: var(--ink);
  color-scheme: dark;
  overscroll-behavior-y: none;
}
body {
  margin: 0;
  padding-top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  overflow-x: hidden;
  background: var(--ink);
  color: var(--ink);
  font-family: Manrope, Arial, sans-serif;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--ink);
  font: 12px "DM Mono", monospace;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 20px;
  height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  padding: env(safe-area-inset-top, 0px) 3.2vw 0;
  background: var(--ink);
  color: #fff;
  border-bottom: 1px solid var(--ink);
}
.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 50vh;
  background: var(--ink);
  pointer-events: none;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.045em;
}
.brand-mark {
  min-width: 38px;
  height: 38px;
  padding: 0 7px;
  display: grid;
  place-items: center;
  border: 1.5px solid currentColor;
  font: 500 16px "DM Mono", monospace;
}
.brand-name { font-family: Manrope, Arial, sans-serif; font-weight: 800; }
.brand-digit { font-weight: 800; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  margin-right: 18px;
}
.site-nav a {
  color: #bdbdbd;
  text-decoration: none;
  text-transform: uppercase;
  font: 11px "DM Mono", monospace;
  letter-spacing: .06em;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: #fff; }
.nav-cta {
  padding: 10px 13px;
  border: 1px solid #fff;
  background: transparent;
  color: #fff;
  text-decoration: none;
  font: 11px "DM Mono", monospace;
}
.kicker {
  margin: 0;
  color: #a6a6a6;
  font: 500 11px/1.4 "DM Mono", monospace;
  letter-spacing: .16em;
}

/* —— Hero —— */
.pb-hero {
  padding: 72px 8vw 64px;
  background: linear-gradient(180deg, #101010 0%, #161616 78%, #1c1c1c 100%);
  color: #fff;
}
.pb-hero .kicker { text-transform: uppercase; }
.hero-brand {
  margin: 36px 0 18px;
  font: 800 clamp(42px, 6vw, 72px)/.88 Manrope, Arial, sans-serif;
  letter-spacing: -.07em;
}
.pb-hero h1 {
  margin: 0;
  font: 600 clamp(42px, 6.5vw, 88px)/1.02 Manrope, Arial, sans-serif;
  letter-spacing: -.075em;
}
.pb-lead {
  max-width: 620px;
  margin: 28px 0 0;
  color: #cfcfcf;
  font-size: 17px;
  line-height: 1.65;
}

.pb-quick-label { margin-top: 36px; }
.pb-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.pb-quick a {
  display: inline-flex;
  padding: 12px 15px;
  border: 1px solid #fff;
  color: #fff;
  text-decoration: none;
  font: 11px "DM Mono", monospace;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.pb-quick a:hover { background: #fff; color: var(--ink); }

/* —— Layout —— */
.pb-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 760px);
  gap: 72px;
  padding: 72px 8vw 96px;
  background: var(--paper);
}

/* —— Sticky contents —— */
.pb-toc {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 8px;
}
.toc-heading { margin-bottom: 14px; color: var(--muted); }
.toc-list,
.toc-sub {
  margin: 0;
  padding: 0;
  list-style: none;
}
.toc-chapter { border-top: 1px solid #e4e4e4; }
.toc-chapter:last-child { border-bottom: 1px solid #e4e4e4; }
.toc-chapter > a {
  display: grid;
  grid-template-columns: 30px 1fr;
  padding: 11px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.3;
}
.toc-chapter > a i {
  padding-top: 2px;
  color: #8a8a8a;
  font: normal 11px "DM Mono", monospace;
}
.toc-chapter.is-active > a i { color: var(--accent); }
.toc-sub { padding: 0 0 10px 30px; }
.toc-sub a {
  display: block;
  padding: 5px 0 5px 10px;
  border-left: 2px solid transparent;
  color: #5c5c5c;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}
.toc-part a { color: var(--ink); font-weight: 600; }
.pb-toc a:hover { color: var(--accent); }
.pb-toc a[aria-current="location"] {
  border-left-color: var(--accent);
  color: var(--ink);
  font-weight: 700;
}
.toc-chapter > a[aria-current="location"] { border-left: 0; }
.js .toc-chapter:not(.is-active) .toc-sub { display: none; }
.toc-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 14px 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  text-align: left;
}
.toc-toggle-label {
  flex: none;
  font: 500 11px "DM Mono", monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.toc-toggle-label::after { content: " +"; }
.toc-toggle[aria-expanded="true"] .toc-toggle-label::after { content: " −"; }
.toc-toggle-current {
  overflow: hidden;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* —— Content —— */
/* Manrope's contextual alternates render "--" as a dash, which corrupts commands like node --test. */
.pb-content,
.pb-toc { font-feature-settings: "calt" 0; }
.pb-content { min-width: 0; }
.pb-chapter {
  margin-top: 72px;
  padding-top: 40px;
  border-top: 1px solid var(--ink);
}
.pb-chapter:first-child { margin-top: 0; }
.pb-content .kicker { color: var(--muted); }
.pb-content h2,
.pb-content h3 { scroll-margin-top: calc(var(--header-h) + 24px); }
.pb-content h2 {
  margin: 18px 0 28px;
  font-size: clamp(36px, 4.4vw, 60px);
  font-weight: 600;
  letter-spacing: -.065em;
  line-height: 1.02;
}
.pb-content h2.pb-part {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
  font-size: clamp(30px, 3.2vw, 44px);
}
.pb-content h3 {
  margin: 40px 0 12px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.04em;
  line-height: 1.25;
}
.pb-content p {
  max-width: 70ch;
  margin: 0 0 16px;
  color: var(--body);
  font-size: 16px;
  line-height: 1.7;
}
.pb-content strong { color: var(--ink); }
.pb-content :not(pre) > code {
  padding: 1px 5px;
  background: #f1f1f1;
  color: var(--ink);
  font: .88em "DM Mono", monospace;
  overflow-wrap: anywhere;
}
.pb-terms dt a { color: var(--ink); text-underline-offset: 3px; text-transform: none; }
.pb-terms dt a:hover { color: var(--accent); }
.pb-steps a,
.pb-terms dd a { color: var(--ink); text-underline-offset: 3px; }
.pb-content p a { color: var(--ink); text-underline-offset: 3px; }
.pb-content p a:hover { color: var(--accent); }

.pb-code {
  margin: 20px 0 24px;
  padding: 20px 22px;
  overflow-x: auto;
  background: var(--ink);
  color: #f1f1f1;
  box-shadow: 8px 8px 0 #e8e8e8;
  font: 13px/1.65 "DM Mono", monospace;
  tab-size: 2;
}
.pb-code code { font: inherit; white-space: pre; }

.pb-table-wrap { margin: 20px 0 28px; overflow-x: auto; }
.pb-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--ink);
  font-size: 15px;
  line-height: 1.5;
}
.pb-table-wrap th,
.pb-table-wrap td {
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.pb-table-wrap thead th {
  color: var(--muted);
  font: 500 11px "DM Mono", monospace;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.pb-table-wrap tbody th { color: var(--ink); font-weight: 600; }
.pb-table-wrap td { color: var(--body); }
.pb-table-wrap td:last-child { font-family: "DM Mono", monospace; font-size: 13px; }

.pb-links {
  margin: 20px 0 28px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.pb-links li { border-bottom: 1px solid var(--line); }
.pb-links a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.02em;
}
.pb-links a::after {
  content: "↗";
  color: #8a8a8a;
  font: 13px "DM Mono", monospace;
}
.pb-links a:hover,
.pb-links a:hover::after { color: var(--accent); }

.pb-terms { margin: 20px 0 28px; border-top: 1px solid var(--ink); }
.pb-terms div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.pb-terms dt {
  color: var(--ink);
  font: 500 12px/1.7 "DM Mono", monospace;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.pb-terms dd {
  margin: 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.65;
}

.pb-steps {
  margin: 20px 0 28px;
  padding: 0;
  list-style: none;
  counter-reset: step;
  border-top: 1px solid var(--ink);
}
.pb-steps li {
  position: relative;
  padding: 16px 0 16px 48px;
  border-bottom: 1px solid var(--line);
  color: var(--body);
  font-size: 15px;
  line-height: 1.65;
  counter-increment: step;
}
.pb-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--accent);
  font: 12px "DM Mono", monospace;
}

.pb-callout {
  margin: 24px 0 28px;
  padding: 18px 22px;
  border-left: 3px solid var(--accent);
  background: #f5f5f5;
}
.pb-content .pb-callout .kicker { color: var(--accent); }
.pb-callout p:last-child { margin: 8px 0 0; }

/* —— Footer —— */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  padding: 25px 3.2vw;
  background: var(--ink);
  color: #aaa;
  font: 10px "DM Mono", monospace;
}
footer .brand { color: #fff; font-size: 20px; }
footer .brand-mark { min-width: 34px; height: 34px; font-size: 15px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: #aaa; text-decoration: none; font: 10px "DM Mono", monospace; }
.footer-links a:hover { color: #fff; }

/* —— Responsive —— */
@media (max-width: 960px) {
  .pb-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 0 20px 72px;
  }
  .pb-toc {
    top: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    z-index: 50;
    max-height: none;
    margin: 0 -20px 40px;
    padding: 0 20px;
    overflow: visible;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }
  .toc-toggle:not([hidden]) { display: flex; }
  .js .pb-content h2,
  .js .pb-content h3 { scroll-margin-top: calc(var(--header-h) + 84px); }
  .js .pb-toc .toc-heading { display: none; }
  .js .pb-toc .toc-list { display: none; }
  .js .pb-toc.is-open .toc-list {
    display: block;
    max-height: 62vh;
    overflow-y: auto;
    padding-bottom: 16px;
  }
  .pb-toc:not(.is-open) { padding-bottom: 0; }
  .pb-chapter:first-child { padding-top: 0; border-top: 0; }
  html:not(.js) .pb-toc { position: static; padding-top: 32px; padding-bottom: 24px; }
}

@media (max-width: 760px) {
  :root { --header-h: 80px; }
  .brand { font-size: 18px; }
  .brand-mark { min-width: 32px; height: 32px; font-size: 14px; }
  .site-nav { gap: 14px; margin-right: 10px; }
  .site-nav a { font-size: 10px; white-space: nowrap; }
  .pb-hero { padding: 48px 20px 44px; }
  .pb-terms div { grid-template-columns: 1fr; gap: 6px; }
  footer { flex-wrap: wrap; padding: 21px 20px; }
  footer > span:last-child { display: none; }
}

@media (max-width: 480px) {
  .site-nav a[aria-current="page"] { display: none; }
  .site-nav { gap: 12px; margin-right: 8px; }
  .nav-cta { padding: 8px 9px; white-space: nowrap; }
}

@media (max-width: 420px) {
  .site-header .brand-name { display: none; }
}

@media print {
  body { padding-top: 0; background: #fff; }
  .site-header,
  .pb-toc,
  footer,
  .skip-link { display: none; }
  .pb-hero { background: #fff; color: var(--ink); padding: 0 0 24px; }
  .pb-lead { color: var(--body); }
  .pb-layout { display: block; padding: 0; }
  .pb-chapter { break-before: page; }
  .pb-code { box-shadow: none; white-space: pre-wrap; }
}