/* Pulse Mesh book theme.
   The tokens are the website's: four
   architectural colors that name four layers (cyan = Pulse, violet = Envelope,
   emerald = substrate, amber = transport), two semantic colors (rose = error,
   slate = inactive), paper and warm-dark chrome, Vollkorn and JetBrains Mono.
   The label idiom (numbered, letter-spaced mono uppercase over a hairline) is
   the Foundation's, as on sovfound.org. mdBook's "light" theme is the paper
   chrome and "navy" is re-tokenised as the dark chrome, the default as on the
   website; the other built-in themes are hidden. mdBook sets 1rem to 10px, so
   a rem here is smaller than the website's; no text is set below 12px, and
   text on paper uses the -ink shades, which pass 4.5:1. */

:root {
  --pm-cyan: #06b6d4;    --pm-cyan-deep: #0891b2;    --pm-cyan-soft: #cffafe;    --pm-cyan-ink: #0e7490;
  --pm-violet: #8b5cf6;  --pm-violet-deep: #7c3aed;  --pm-violet-soft: #ede9fe;
  --pm-emerald: #10b981; --pm-emerald-deep: #047857; --pm-emerald-soft: #d1fae5;
  --pm-amber: #f59e0b;   --pm-amber-deep: #d97706;   --pm-amber-soft: #fef3c7;   --pm-amber-ink: #b45309;
  --pm-rose: #f43f5e;    --pm-rose-deep: #e11d48;    --pm-rose-soft: #ffe4e6;
  --pm-slate: #64748b;   --pm-slate-deep: #475569;   --pm-slate-soft: #f1f5f9;
  --pm-font-serif: "Vollkorn", Georgia, "Times New Roman", serif;
  --pm-font-mono: "JetBrains Mono", "Menlo", "SFMono-Regular", Consolas, monospace;
  --pm-track-wide: 0.06em;
  --pm-track-extra: 0.10em;
  --pm-track-mega: 0.15em;
  --mono-font: var(--pm-font-mono);
  --content-max-width: 760px;   /* the website's document measure */
  --menu-bar-height: 76px;      /* the website's header: a 40px mark with 18px above and below */
}

/* ---- Paper chrome (mdBook "light") ---------------------------------------- */
html.light {
  --pm-bg: #fefefe; --pm-surface: #ffffff; --pm-surface-2: #f8f8f8;
  --pm-text: #1a1a1a; --pm-text-body: #333333; --pm-text-mute: #555555;
  --pm-text-aside: #666666; --pm-text-soft: #6e6e6e; --pm-text-faint: #cccccc;
  --pm-rule: #eeeeee; --pm-rule-strong: #dddddd;
  --pm-accent: var(--pm-amber-ink); --pm-accent-ink: #ffffff; --pm-link: var(--pm-cyan-ink);

  --bg: var(--pm-bg); --fg: var(--pm-text-body);
  --sidebar-bg: var(--pm-surface-2); --sidebar-fg: var(--pm-text-mute);
  --sidebar-non-existant: var(--pm-text-faint); --sidebar-active: var(--pm-accent);
  --sidebar-spacer: var(--pm-rule);
  --scrollbar: var(--pm-rule-strong);
  --icons: var(--pm-text-soft); --icons-hover: var(--pm-text);
  --links: var(--pm-link);
  --inline-code-color: var(--pm-link);
  --theme-popup-bg: var(--pm-surface); --theme-popup-border: var(--pm-rule-strong);
  --theme-hover: var(--pm-surface-2);
  --quote-bg: var(--pm-surface-2); --quote-border: var(--pm-rule-strong);
  --warning-border: var(--pm-amber);
  --table-border-color: var(--pm-rule); --table-header-bg: var(--pm-surface-2);
  --table-alternate-bg: var(--pm-surface);
  --searchbar-border-color: var(--pm-rule-strong); --searchbar-bg: var(--pm-surface);
  --searchbar-fg: var(--pm-text); --searchbar-shadow-color: rgba(0, 0, 0, 0.04);
  --searchresults-header-fg: var(--pm-text-mute); --searchresults-border-color: var(--pm-rule);
  --searchresults-li-bg: var(--pm-surface-2); --search-mark-bg: var(--pm-amber-soft);
  --color-scheme: light;
  --footnote-highlight: var(--pm-amber-soft);
  --blockquote-note-color: var(--pm-cyan-ink); --blockquote-tip-color: var(--pm-emerald-deep);
  --blockquote-important-color: var(--pm-violet-deep); --blockquote-warning-color: var(--pm-amber-ink);
  --blockquote-caution-color: var(--pm-rose-deep);
  --sidebar-header-border-color: var(--pm-rule-strong);
}

/* ---- Dark chrome (mdBook "navy", re-tokenised) ----------------------------- */
html.navy {
  --pm-bg: #131210; --pm-surface: #1a1816; --pm-surface-2: #201d1a;
  --pm-text: #ededed; --pm-text-body: #d0cfcd; --pm-text-mute: #9a9896;
  --pm-text-aside: #8a8886; --pm-text-soft: #8a8886; --pm-text-faint: #555351;
  --pm-rule: rgba(255, 255, 250, 0.10); --pm-rule-strong: rgba(255, 255, 250, 0.20);
  --pm-cyan-soft: rgba(6, 182, 212, 0.18); --pm-violet-soft: rgba(139, 92, 246, 0.18);
  --pm-emerald-soft: rgba(16, 185, 129, 0.18); --pm-amber-soft: rgba(245, 158, 11, 0.18);
  --pm-rose-soft: rgba(244, 63, 94, 0.18); --pm-slate-soft: rgba(100, 116, 139, 0.18);
  --pm-slate: #94a3b8; --pm-slate-deep: #cbd5e1;
  --pm-accent: var(--pm-amber); --pm-accent-ink: #131210; --pm-link: var(--pm-cyan);

  --bg: var(--pm-bg); --fg: var(--pm-text-body);
  --sidebar-bg: var(--pm-surface); --sidebar-fg: var(--pm-text-mute);
  --sidebar-non-existant: var(--pm-text-faint); --sidebar-active: var(--pm-accent);
  --sidebar-spacer: var(--pm-rule);
  --scrollbar: var(--pm-rule-strong);
  --icons: var(--pm-text-soft); --icons-hover: var(--pm-text);
  --links: var(--pm-link);
  --inline-code-color: var(--pm-cyan);
  --theme-popup-bg: var(--pm-surface); --theme-popup-border: var(--pm-rule-strong);
  --theme-hover: var(--pm-surface-2);
  --quote-bg: var(--pm-surface-2); --quote-border: var(--pm-rule-strong);
  --warning-border: var(--pm-amber);
  --table-border-color: var(--pm-rule); --table-header-bg: var(--pm-surface-2);
  --table-alternate-bg: var(--pm-surface);
  --searchbar-border-color: var(--pm-rule-strong); --searchbar-bg: var(--pm-surface-2);
  --searchbar-fg: var(--pm-text); --searchbar-shadow-color: rgba(0, 0, 0, 0.4);
  --searchresults-header-fg: var(--pm-text-mute); --searchresults-border-color: var(--pm-rule);
  --searchresults-li-bg: var(--pm-surface-2); --search-mark-bg: var(--pm-amber-soft);
  --color-scheme: dark;
  --footnote-highlight: var(--pm-amber-soft);
  --blockquote-note-color: var(--pm-cyan); --blockquote-tip-color: var(--pm-emerald);
  --blockquote-important-color: var(--pm-violet); --blockquote-warning-color: var(--pm-amber);
  --blockquote-caution-color: var(--pm-rose);
  --sidebar-header-border-color: var(--pm-rule-strong);
  --copy-button-filter: invert(60%);
  --copy-button-filter-hover: invert(90%);
}

/* ---- Type ------------------------------------------------------------------ */
body {
  font-family: var(--pm-font-serif);
  font-feature-settings: "kern" 1, "liga" 1;
  /* Vollkorn's default figures are old-style, where 1 reads as I and 0 as o. */
  font-variant-numeric: lining-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.content main {
  font-family: var(--pm-font-serif);
  font-size: 1.8rem;          /* 18 px, the website's baseline */
  line-height: 1.53;
  color: var(--pm-text-body);
}
.content h1, .content h2, .content h3, .content h4, .content h5 {
  font-family: var(--pm-font-serif);
  font-weight: 400;
  line-height: 1.2;
  color: var(--pm-text);
}
.content h1 { font-size: 2.6em; letter-spacing: -0.02em; margin: 0.9em 0 0.5em; }
.content h2 { font-size: 1.5em; margin: 2.4em 0 0.9em; position: relative; }
.content h2::after {
  content: ""; display: block; width: 100px; height: 1px;
  background: var(--pm-rule-strong); margin-top: 0.5em;
}
.content h3 { font-size: 1.1em; font-style: italic; color: var(--pm-text-mute); margin: 2em 0 0.7em; }
.content h4 { font-family: var(--pm-font-mono); font-size: 0.72em; letter-spacing: var(--pm-track-extra); text-transform: uppercase; color: var(--pm-text-mute); margin: 2em 0 0.7em; }
.content p { margin: 0 0 0.9em; }
.content a:not(.pm-cta) { color: var(--pm-link); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--pm-link) 35%, transparent); text-underline-offset: 0.15em; }
.content a:not(.pm-cta):hover { text-decoration-color: var(--pm-link); }
.content strong { font-weight: 600; color: var(--pm-text); }
.content code { font-family: var(--pm-font-mono); font-size: 0.86em; }
.content pre { background: var(--pm-surface-2); border: 1px solid var(--pm-rule); border-radius: 4px; }
.content pre > code { background: transparent; font-size: 0.82em; line-height: 1.55; }
/* Code in running text is framed; when it breaks across lines, each piece keeps its frame. */
.content :not(pre) > code { background: var(--pm-surface-2); border: 1px solid var(--pm-rule); border-radius: 3px; padding: 0.05em 0.35em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.content table { font-size: 0.9em; border-collapse: collapse; font-variant-numeric: lining-nums tabular-nums; }
.content table th { font-family: var(--pm-font-mono); font-size: 0.75em; font-weight: 500; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-mute); background: var(--table-header-bg); }
.content table td, .content table th { border: 1px solid var(--table-border-color); padding: 0.45em 0.7em; vertical-align: top; }
/* In a table the cell is the frame: code sits bare, and a name in the first column keeps to one line. */
.content table :not(pre) > code { background: none; border: 0; padding: 0; }
.content table td:first-child > code { white-space: nowrap; }
.content blockquote { border-left: 3px solid var(--pm-amber); background: var(--quote-bg); color: var(--pm-text-aside); font-style: italic; }
.content blockquote code { font-style: normal; }
.content hr { border: 0; height: 1px; background: var(--pm-rule-strong); margin: 2.5em 0; }
.content img { max-width: 100%; }

/* Every page opens with its kind and its reader: the kind as a mono label, the reader in the voice of the text. */
.content .pm-kind {
  font-family: var(--pm-font-serif);
  font-size: 0.86em;
  font-style: italic;
  color: var(--pm-text-mute);
  border-bottom: 1px solid var(--pm-rule);
  padding-bottom: 0.6em;
  margin: 0 0 1.8em;
}
.content .pm-kind b {
  font-family: var(--pm-font-mono);
  font-size: 0.8em;
  font-style: normal;
  font-weight: 500;
  letter-spacing: var(--pm-track-extra);
  text-transform: uppercase;
  color: var(--pm-accent);
}

/* Figure with caption, mirroring the website's .pm-viz caption. */
.content figure.pm-figure { margin: 2em 0; }
.content figure.pm-figure img { display: block; margin: 0 auto; }
.content figure.pm-figure figcaption { font-family: var(--pm-font-mono); font-size: 0.7em; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-soft); text-align: center; margin-top: 0.8em; }

/* Figures come in a paper and a dark rendering; the chrome picks one. */
html.light .pm-figure img.pm-fig-dark, html.navy .pm-figure img.pm-fig-light { display: none; }

/* ---- The website's mark: two nodes and the beam between them, as in its header ---- */
.pm-mark { display: block; flex-shrink: 0; width: 40px; height: 40px; color: var(--pm-text); }
.pm-mark .pm-mark-beam { stroke: var(--pm-accent); stroke-dasharray: 2 3; }
@media (prefers-reduced-motion: no-preference) {
  .pm-mark .pm-mark-beam { animation: pm-beam-flow 1.4s linear infinite; }
  .pm-mark .pm-mark-node-sm { animation: pm-node-breathe 3s ease-in-out infinite; }
  .pm-mark .pm-mark-node-lg { animation: pm-node-breathe 4s ease-in-out infinite -1s; }
}
@keyframes pm-beam-flow { to { stroke-dashoffset: -10; } }
@keyframes pm-node-breathe { 0%, 100% { opacity: 1; } 50% { opacity: 0.65; } }
.pm-brand-text { display: flex; flex-direction: column; gap: 0.3rem; line-height: 1.15; min-width: 0; }
.pm-wordmark { font-family: var(--pm-font-serif); font-size: 1.55rem; font-weight: 500; letter-spacing: 0.02em; color: var(--pm-text); white-space: nowrap; }
.pm-brand-sub { font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-soft); white-space: nowrap; }

/* The Foundation's monogram, for the introduction and the part openers. */
.pm-logo { display: block; width: 44px; height: 44px; margin: 0 auto 1rem; }
html.light .pm-logo-dark, html.navy .pm-logo-light { display: none; }
.pm-tm { font-family: var(--pm-font-serif); font-size: 0.5em; font-weight: 400; letter-spacing: 0; vertical-align: super; margin-left: 0.15em; }

/* ---- Sidebar ---------------------------------------------------------------- */
.sidebar { font-family: var(--pm-font-serif); counter-reset: pm-part; }
.sidebar .sidebar-scrollbox { padding-top: 0.5rem; }
.chapter li a, .chapter li > div { font-size: 1.45rem; }
.chapter li.chapter-item { line-height: 1.5; }
.chapter .part-title {
  font-family: var(--pm-font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: var(--pm-track-mega);
  text-transform: uppercase;
  color: var(--pm-text-soft);
  margin: 2em 0 0.6em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--pm-rule);
  counter-increment: pm-part;
}
.chapter .part-title::before { content: "0" counter(pm-part) "  "; color: var(--pm-accent); }
/* A part's first entry is its opener: set as the part's lede rather than as one more page. */
.chapter li.part-title + li.chapter-item > .chapter-link-wrapper > a { font-style: italic; }

/* The sidebar's head is the left half of the website's header: the mark and the name, as tall as the menu bar beside it. */
.pm-sidebar-brand {
  display: flex; align-items: center; gap: 1.2rem;
  box-sizing: border-box; height: calc(var(--menu-bar-height) + 1px);   /* the menu bar's height leaves out its bottom rule; this box counts it */
  padding: 0 1.6rem; margin: 0;
  border-bottom: 1px solid var(--pm-rule);
  background: var(--pm-bg);
  text-decoration: none;
}
.pm-sidebar-brand:hover .pm-wordmark { color: var(--pm-link); }

/* The three books, one row under the brand; the one being read is marked. */
.pm-books { display: flex; margin: 0; padding: 0; list-style: none; border-bottom: 1px solid var(--pm-rule); }
.pm-books li { flex: 1; margin: 0; }
.pm-books a { display: block; padding: 1rem 0.4rem 0.8rem; text-align: center; font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-mute); text-decoration: none; border-bottom: 2px solid transparent; }
.pm-books a:hover { color: var(--pm-text); }
.pm-books a[aria-current] { color: var(--pm-text); border-bottom-color: var(--pm-accent); }

/* The website's pages, in the sidebar when the menu bar has no room for them. */
.pm-site-links { display: none; margin: 0; padding: 0.8rem 1.6rem 1rem; list-style: none; border-bottom: 1px solid var(--pm-rule); columns: 2; column-gap: 1.6rem; }
.pm-site-links li { margin: 0; break-inside: avoid; }
.pm-site-links a { display: block; padding: 0.5rem 0; font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-mute); text-decoration: none; }
.pm-site-links a:hover, .pm-site-links a[aria-current] { color: var(--pm-text); }
@media only screen and (max-width: 1379px) { .pm-site-links { display: block; } }

/* ---- Menu bar: the right half of the website's header -------------------------- */
.menu-bar { container: pm-menu / inline-size; border-bottom: 1px solid var(--pm-rule); background: var(--pm-bg); }
.menu-bar .left-buttons { margin: 0 0.4rem 0 0.8rem; }
#mdbook-theme-toggle, #mdbook-theme-list, .menu-bar .right-buttons > a:not(.pm-nav-cta) { display: none !important; }
.menu-bar .right-buttons { margin: 0 2.4rem 0 auto; display: flex; align-items: center; gap: 2.8rem; }
.menu-title { flex: 0 1 auto; margin: 0 1.6rem 0 0.6rem; text-align: left; font-size: 1.55rem; line-height: var(--menu-bar-height); overflow: visible; }
.pm-nav-brand { display: inline-flex; align-items: center; gap: 1.2rem; vertical-align: middle; text-decoration: none; }
.pm-nav-brand:hover .pm-wordmark { color: var(--pm-link); }
/* One brand in view: the sidebar's while it is open, the menu bar's while it is not. */
html.sidebar-visible .pm-nav-brand { display: none; }
.pm-nav-links { display: flex; align-items: center; gap: 2.8rem; margin: 0; padding: 0; list-style: none; white-space: nowrap; }
.pm-nav-links li { margin: 0; }
.pm-nav-links a { font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-mute); text-decoration: none; transition: color 0.2s; }
.pm-nav-links a:hover, .pm-nav-links a[aria-current] { color: var(--pm-text); }
.pm-theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; padding: 0; border: 1px solid var(--pm-rule-strong); border-radius: 8px; background: transparent; color: var(--pm-text-mute); cursor: pointer; flex-shrink: 0; transition: color 0.2s, border-color 0.2s; }
.pm-theme-toggle:hover { color: var(--pm-text); border-color: var(--pm-text-soft); }
.pm-theme-toggle svg { width: 16px; height: 16px; }
/* The icon shows where a click leads, as on the website: the sun in the dark, the moon on paper. */
html.navy .pm-theme-toggle .pm-icon-moon, html.light .pm-theme-toggle .pm-icon-sun { display: none; }
.menu-bar .right-buttons a.pm-nav-cta { font-family: var(--pm-font-mono); font-size: 1.2rem; font-weight: 500; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-accent-ink); background: var(--pm-accent); border: 1px solid var(--pm-accent); border-radius: 8px; padding: 7px 14px; line-height: 1.4; text-decoration: none; white-space: nowrap; flex-shrink: 0; transition: filter 0.2s; }
.menu-bar .right-buttons a.pm-nav-cta:hover { filter: brightness(1.1); }
.pm-nav-cta .pm-cta-short { display: none; }
/* The links leave the menu bar when it has no room for them; the sidebar then carries them. */
@container pm-menu (max-width: 1199px) { html:not(.sidebar-visible) .pm-nav-links { display: none; } }
@container pm-menu (max-width: 1059px) { .pm-nav-links { display: none; } }
@container pm-menu (max-width: 719px) {
  .pm-nav-cta .pm-cta-full { display: none; }
  .pm-nav-cta .pm-cta-short { display: inline; }
  .menu-bar .right-buttons { gap: 1.2rem; margin-right: 1.2rem; }
}
@container pm-menu (max-width: 479px) {
  .pm-nav-brand .pm-brand-text { display: none; }
  .menu-title { margin: 0 0.4rem; }
}

/* ---- Search -------------------------------------------------------------------- */
#mdbook-searchbar { font-family: var(--pm-font-serif); font-size: 1.7rem; }
.pm-search-elsewhere { font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-soft); margin: 0.8rem 0 0; }
.pm-search-elsewhere a { color: var(--pm-link); }

/* ---- Keyboard ------------------------------------------------------------------ */
.pm-skip { position: absolute; left: 1.2rem; top: -10rem; z-index: 1000; padding: 0.8rem 1.4rem; font-family: var(--pm-font-mono); font-size: 1.3rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-bg); background: var(--pm-text); border-radius: 4px; text-decoration: none; }
.pm-skip:focus { top: 1.2rem; }
:where(a, button, input, label, summary, [tabindex]):focus-visible { outline: 2px solid var(--pm-link); outline-offset: 2px; }
/* The skip link moves focus to the text itself, which needs no ring. */
#mdbook-content main[tabindex="-1"]:focus { outline: none; }

/* ---- Previous and next: two labelled links at the foot of the page, never chevrons ---- */
.nav-wide-wrapper { display: none !important; }
.nav-wrapper { display: flex !important; justify-content: space-between; gap: 2rem; margin: 4rem 0 1rem; padding-top: 1.6rem; border-top: 1px solid var(--pm-rule); font-size: 1.6rem; }
.nav-wrapper > div[style] { display: none; }
.nav-wrapper .mobile-nav-chapters, .nav-wrapper .mobile-nav-chapters:visited { float: none; width: auto; max-width: 48%; font-size: 1em; background: none; border-radius: 0; text-align: left; display: flex; flex-direction: column; gap: 0.35rem; color: var(--pm-text); text-decoration: none; right: auto; }
.nav-wrapper .mobile-nav-chapters.next { margin-left: auto; text-align: right; align-items: flex-end; }
.nav-wrapper .mobile-nav-chapters .fa-svg { display: none; }
.pm-nav-kicker { font-family: var(--pm-font-mono); font-size: 0.75em; letter-spacing: var(--pm-track-extra); text-transform: uppercase; color: var(--pm-text-soft); }
.mobile-nav-chapters.previous .pm-nav-kicker::before { content: "\2190  "; }
.mobile-nav-chapters.next .pm-nav-kicker::after { content: "  \2192"; }
.pm-nav-target { font-family: var(--pm-font-serif); color: var(--pm-text); }
.nav-wrapper .mobile-nav-chapters:hover .pm-nav-target { color: var(--pm-accent); }

/* ---- The website's visualizations, live, when the book is served from inside the site ---- */
:root { --pm-space-xs: 4px; --pm-space-sm: 8px; --pm-space-md: 16px; --pm-type-xs: 12px; --pm-dur-fast: 150ms; }
.content figure.pm-figure.is-live { margin: 2.4em 0 3em; }
.content .pm-viz { position: relative; margin: 0; }
.content .pm-viz canvas { width: 100%; display: block; border: 1px solid var(--pm-rule); }
.content .pm-viz-controls { display: flex; gap: var(--pm-space-sm); align-items: center; margin-top: var(--pm-space-sm); font-family: var(--pm-font-mono); font-size: var(--pm-type-xs); color: var(--pm-text-soft); flex-wrap: wrap; }
.content .pm-viz-btn { background: var(--pm-surface); border: 1px solid var(--pm-rule-strong); border-radius: 3px; padding: var(--pm-space-xs) var(--pm-space-md); font-family: var(--pm-font-mono); font-size: var(--pm-type-xs); letter-spacing: var(--pm-track-extra); text-transform: uppercase; color: var(--pm-text); cursor: pointer; transition: border-color var(--pm-dur-fast), background-color var(--pm-dur-fast); }
.content .pm-viz-btn:hover { border-color: var(--pm-cyan); background: var(--pm-cyan-soft); }
.content .pm-viz-btn.is-active { border-color: var(--pm-cyan); background: var(--pm-cyan-soft); color: var(--pm-cyan-ink); }
html.navy .content .pm-viz-btn.is-active { color: var(--pm-cyan); }

/* ---- Hero (introduction) and part openers: the CV's monogram treatment ------ */
.pm-hero, .pm-part {
  text-align: center;
  padding: 2.2rem 1rem 1.8rem;
  border-bottom: 1px solid var(--pm-rule);
  margin-bottom: 2.2rem;
}
.pm-hero .pm-logo, .pm-part .pm-logo { width: 84px; height: 84px; margin: 0.4rem auto 1.9rem; }
.pm-eyebrow {
  display: block;
  font-family: var(--pm-font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: var(--pm-track-mega);
  text-transform: uppercase;
  color: var(--pm-text-soft);
  margin-bottom: 1.3rem;
}
.pm-hero h1, .pm-part h1 { border-bottom: none; margin: 0 0 0.6rem; font-size: 2.8em; letter-spacing: -0.02em; }
.pm-hero h1 .pm-accent, .pm-part h1 .pm-accent { color: var(--pm-accent); font-style: italic; }
.pm-hero .pm-sub, .pm-part .pm-sub { max-width: 40em; margin: 0 auto 1.4rem; font-style: italic; color: var(--pm-text-mute); font-size: 1.05em; }
.pm-hero .pm-ident { font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-extra); text-transform: uppercase; color: var(--pm-text-soft); margin-bottom: 1.4rem; }
/* The notice is a quiet line under the identification, not a callout. */
.pm-status {
  display: block; max-width: 40em; margin: 0 auto 1.6rem;
  font-size: 0.86em; font-style: italic; text-align: center; color: var(--pm-text-mute);
}
.pm-status strong { color: var(--pm-text); }
.pm-cta-row { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }
.pm-cta {
  display: inline-block; padding: 0.6em 1.3em; border-radius: 3px;
  font-family: var(--pm-font-mono); font-size: 1.2rem; letter-spacing: var(--pm-track-extra);
  text-transform: uppercase; text-decoration: none !important; border: 1px solid var(--pm-rule-strong);
  color: var(--pm-text) !important; transition: border-color 200ms, background-color 200ms;
}
.pm-cta-primary { background: var(--pm-text); color: var(--pm-bg) !important; border-color: var(--pm-text); }
.pm-cta-primary:hover { background: var(--pm-accent); border-color: var(--pm-accent); color: var(--pm-accent-ink) !important; }
.pm-cta-secondary:hover { border-color: var(--pm-accent); }
/* On a phone the opener gives way to the text sooner. */
@media only screen and (max-width: 600px) {
  .pm-hero, .pm-part { padding: 1.2rem 0 1.4rem; margin-bottom: 1.6rem; }
  .pm-hero .pm-logo, .pm-part .pm-logo { width: 52px; height: 52px; margin: 0 auto 1.2rem; }
  .pm-eyebrow { letter-spacing: var(--pm-track-extra); margin-bottom: 0.9rem; }
  .pm-hero h1, .pm-part h1 { font-size: 2.2em; }
  .pm-hero .pm-sub, .pm-part .pm-sub { font-size: 1em; }
}

/* ---- Print ------------------------------------------------------------------ */
@media print {
  .pm-sidebar-brand, .pm-books, .pm-site-links, .pm-skip, .pm-cta-row, .pm-nav-links, .pm-theme-toggle, .pm-nav-cta, .nav-wrapper { display: none; }
}


/* ---- The website's document header, built by pm.js from the page's heading and its kind line ---- */
.content .pm-doc-header { text-align: center; max-width: 880px; margin: 0.6em auto 2.6em; padding: 0.4em 0 2.2em; border-bottom: 1px solid var(--pm-rule); }
.content .pm-doc-kicker { font-family: var(--pm-font-mono); font-size: 1.15rem; letter-spacing: var(--pm-track-mega); text-transform: uppercase; color: var(--pm-text-soft); margin: 0 0 1.1em; }
.content .pm-doc-kicker b { font-weight: 500; color: var(--pm-accent); }
.content .pm-doc-header h1 { border: 0; margin: 0 0 0.5em; font-size: clamp(2.2em, 3.6vw, 3.1em); font-weight: 400; letter-spacing: -0.015em; line-height: 1.15; color: var(--pm-text); }
.content .pm-doc-lede { font-style: italic; font-size: 1.05em; color: var(--pm-text-mute); max-width: 42em; margin: 0 auto; line-height: 1.6; }
.content .pm-doc-meta { font-family: var(--pm-font-mono); font-size: 1.15rem; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-soft); margin-top: 1.6em; }
.content .pm-doc-meta span { margin: 0 0.7em; }
.content .pm-doc-meta .pm-sep { color: var(--pm-text-faint); }
/* The parts' and the introduction's own heroes keep their shape; every other page gets the header. */
.content h1.pm-doc-raw { display: none; }

/* ---- The website's document body ---- */
.content h2 { text-align: center; font-weight: 400; font-size: 1.65em; letter-spacing: -0.005em; margin: 3em 0 0.6em; }
.content h2::after { content: ""; display: block; width: 60px; height: 1px; background: var(--pm-text-faint); margin: 0.8em auto 1.6em; }
.content h3 { font-style: normal; font-weight: 600; font-size: 1.15em; color: var(--pm-text); margin: 2em 0 0.6em; }
.content p { line-height: 1.65; }
.content ul, .content ol { margin: 1em 0 1em 1.8em; }
.content li { margin-bottom: 0.5em; line-height: 1.6; }
.content pre { border-radius: 3px; }
.content table { width: 100%; margin: 1.6em 0; font-size: 0.9em; }
.content table td, .content table th { border: 0; border-bottom: 1px solid var(--pm-rule); padding: 0.6em 0.9em; text-align: left; vertical-align: top; }
.content table th { font-size: 0.72em; letter-spacing: var(--pm-track-wide); text-transform: uppercase; color: var(--pm-text-soft); border-bottom: 1px solid var(--pm-text); background: none; }
.content table tr:nth-child(2n) td { background: none; }
.content blockquote { border-left: 2px solid var(--pm-text-faint); background: none; font-style: italic; color: var(--pm-text-mute); padding: 0.4em 0 0.4em 1.4em; }
/* The first two paragraphs of an example or workflow, "You will have" and "You need", read as its lede. */
.content .pm-lede-block { font-size: 1.02em; }

/* ---- The website's line illustrations: one per example and workflow, in the use-case style ---- */
.content figure.pm-art { margin: 0 0 2.4em; padding: 1.6em; border: 1px solid var(--pm-rule); border-radius: 3px; background: var(--pm-surface); }
.content figure.pm-art figcaption { font-family: var(--pm-font-mono); font-size: 0.7em; letter-spacing: var(--pm-track-extra); text-transform: uppercase; color: var(--pm-text-soft); text-align: center; margin-top: 1.2em; }
.uc-diagram { display: block; width: 100%; max-width: 560px; height: auto; margin: 0 auto; }
.uc-diagram .uc-edge { stroke: var(--pm-text-faint); stroke-width: 1; }
.uc-diagram .uc-edge-dash { stroke: var(--pm-text-faint); stroke-width: 1; stroke-dasharray: 3 5; }
.uc-diagram .uc-node { fill: var(--pm-bg); stroke: var(--pm-text-mute); stroke-width: 1; }
.uc-diagram .uc-node-strong { fill: var(--pm-text); stroke: none; }
.uc-diagram .uc-ring { fill: none; stroke: var(--pm-text-mute); stroke-width: 1.2; }
.uc-diagram .uc-ring-dash { fill: none; stroke: var(--pm-text-faint); stroke-width: 1; stroke-dasharray: 2 5; }
.uc-diagram .uc-core, .uc-diagram .uc-pulse { fill: var(--pm-accent); }
.uc-diagram .uc-dead { stroke: var(--pm-accent); stroke-dasharray: 2 3; }
.uc-diagram .uc-dead-mark { stroke: var(--pm-accent); stroke-width: 1.4; }
.uc-diagram .uc-label { font-family: var(--pm-font-mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; fill: var(--pm-text-soft); text-anchor: middle; }
.uc-diagram .uc-label-left { text-anchor: start; }
.uc-diagram .uc-frame { fill: var(--pm-surface-2); stroke: var(--pm-text-faint); stroke-width: 1; }
.uc-diagram .uc-frame-seg { stroke: var(--pm-text-faint); stroke-width: 1; }
.uc-diagram .uc-frame-accent { fill: var(--pm-amber-soft); stroke: var(--pm-accent); stroke-width: 1; }
@media (prefers-reduced-motion: reduce) { .uc-diagram animateMotion { display: none; } }

/* ---- The sidebar is a drawer, as the website has no sidebar: closed until asked for ---- */
html.sidebar-visible .sidebar { box-shadow: 1px 0 0 var(--pm-rule); }
.content main { padding-top: 1rem; }