@font-face {
  font-family: 'Roboto Flex';
  font-style: oblique 0deg 10deg;
  font-display: swap;
  font-weight: 100 1000;
  font-stretch: 25% 151%;
  src: url(fonts/roboto-flex-latin-standard-normal.woff2) format('woff2-variations');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Roboto Flex';
  font-style: oblique 0deg 10deg;
  font-display: swap;
  font-weight: 100 1000;
  font-stretch: 25% 151%;
  src: url(fonts/roboto-flex-latin-ext-standard-normal.woff2) format('woff2-variations');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  src: url(fonts/jetbrains-mono-latin-wght-normal.woff2) format('woff2-variations');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  src: url(fonts/jetbrains-mono-latin-ext-wght-normal.woff2) format('woff2-variations');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: italic;
  font-display: swap;
  font-weight: 100 800;
  src: url(fonts/jetbrains-mono-latin-wght-italic.woff2) format('woff2-variations');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Direction A from sendline.now: a dark ground like a start gate at night, warm neutrals, and one hot colour that
   belongs to the section the reader is in. Here a section is a library. */
:root {
  color-scheme: dark;

  --house: #df7859;
  --mongo4s: #5bbf7a;
  --logging4s: #e5b54a;
  --metrics4s: #52b6ea;
  /* Each colour's ink, as in brand/: what is drawn or written on a plate of that colour. */
  --mongo4s-ink: #061a0b;
  --logging4s-ink: #1f1500;
  --metrics4s-ink: #021a29;

  --ground: #0c0d0f;
  --card: #16181b;
  --raised: #1c1f23;
  --code: #121417;
  --line: #272a2e;
  --line-strong: #383c42;
  --ink: #f1f0ec;
  --ink-dim: #959aa1;
  --mark-ink: #16130e;
  --knockout: #ffffff;

  --section: var(--house);
  --section-ink: var(--mark-ink);
  --section-text: var(--section);
  --section-soft: color-mix(in srgb, var(--section) 14%, transparent);

  --syn-keyword: #c9c3b8;
  --syn-comment: #7d828a;
  --syn-type: #f1f0ec;

  --font-ui: 'Roboto Flex', 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
  --font-plate: 'Roboto Flex', 'Arial Black', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Consolas, monospace;

  --radius: 0.5rem;
  --measure: 50rem;
  --page: 90rem;
  --topbar: 3.5rem;
  --gutter: 1rem;
}

:root[data-lib='mongo4s'] { --section: var(--mongo4s); --section-ink: var(--mongo4s-ink); }
:root[data-lib='logging4s'] { --section: var(--logging4s); --section-ink: var(--logging4s-ink); }
:root[data-lib='metrics4s'] { --section: var(--metrics4s); --section-ink: var(--metrics4s-ink); }

/* Code is coloured at build time against these (Shiki's css-variables theme), so both themes share one markup. */
:root {
  --shiki-foreground: var(--ink);
  --shiki-background: transparent;
  --shiki-token-keyword: var(--syn-keyword);
  --shiki-token-string: var(--section-text);
  --shiki-token-string-expression: var(--section-text);
  --shiki-token-constant: var(--section-text);
  --shiki-token-comment: var(--syn-comment);
  --shiki-token-function: var(--syn-type);
  --shiki-token-parameter: var(--ink);
  --shiki-token-punctuation: var(--ink-dim);
  --shiki-token-link: var(--section-text);
  --shiki-token-inserted: #4fb36d;
  --shiki-token-deleted: #e0715b;
  --shiki-token-changed: var(--ink);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) {
    color-scheme: light;
    --ground: #f7f5f0;
    --card: #ffffff;
    --raised: #efece5;
    --code: #f0ede6;
    --line: #e3dfd6;
    --line-strong: #cfcac0;
    --ink: #16130e;
    --ink-dim: #5d6168;
    --syn-keyword: #3d3a35;
    --syn-comment: #62676e;
    --syn-type: #16130e;
    --section-text: color-mix(in srgb, var(--section) 52%, #000);
  }
  :root:not([data-theme='dark'])[data-lib='mongo4s'] { --section-text: #1d7a3f; }
  :root:not([data-theme='dark'])[data-lib='logging4s'] { --section-text: #8a6100; }
  :root:not([data-theme='dark'])[data-lib='metrics4s'] { --section-text: #0a689c; }
  :root:not([data-theme='dark']):not([data-lib]) { --section-text: #a54826; }
}

:root[data-theme='light'] {
  color-scheme: light;
  --ground: #f7f5f0;
  --card: #ffffff;
  --raised: #efece5;
  --code: #f0ede6;
  --line: #e3dfd6;
  --line-strong: #cfcac0;
  --ink: #16130e;
  --ink-dim: #5d6168;
  --syn-keyword: #3d3a35;
  --syn-comment: #62676e;
  --syn-type: #16130e;
  --section-text: #a54826;
}
:root[data-theme='light'][data-lib='mongo4s'] { --section-text: #1d7a3f; }
:root[data-theme='light'][data-lib='logging4s'] { --section-text: #8a6100; }
:root[data-theme='light'][data-lib='metrics4s'] { --section-text: #0a689c; }

* { box-sizing: border-box; }

html {
  scrollbar-gutter: stable;
  scroll-padding-top: calc(var(--topbar) + 1.5rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
}

a { color: var(--section-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
:focus-visible { outline: 2px solid var(--section); outline-offset: 2px; border-radius: 3px; }

h1, h2, h3, h4 { font-family: var(--font-plate); line-height: 1.2; margin: 0; }
h2 { font-size: 1.625rem; font-weight: 820; font-stretch: 112%; letter-spacing: -0.01em; margin: 3rem 0 1rem; }
h3 { font-size: 1.1875rem; font-weight: 700; font-stretch: 104%; margin: 2rem 0 0.75rem; }
p { margin: 0 0 1rem; }

/* The # is drawn by CSS so it stays out of the heading's text: search, copy and the tab title never pick it up. */
.anchor { color: var(--ink-dim); opacity: 0; margin-left: 0.4rem; font-weight: 400; text-decoration: none; }
.anchor::before { content: '#'; }
h2:hover .anchor, h3:hover .anchor { opacity: 1; }

/* Code reads as typed: JetBrains Mono would otherwise draw `<-` and `=>` as arrows nobody can copy back. */
code, pre, kbd { font-family: var(--font-mono); font-size: 0.875em; font-variant-ligatures: none; }
:not(pre) > code {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  padding: 0.06em 0.36em;
  overflow-wrap: anywhere;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.mono { font-family: var(--font-mono); }
.dim { color: var(--ink-dim); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- marks ---------- */

/* A library mark is the Sendline patch in the library's colour with its own glyph knocked out. The symbols read
   --m-patch, --m-ink and --m-rim, which cross into <use> by inheritance, and fall back to the colours in brand/. */
.mark { display: block; flex: none; }

.wordmark {
  font-family: var(--font-plate);
  font-weight: 900;
  font-stretch: 122%;
  letter-spacing: -0.015em;
  line-height: 1;
}
.wordmark b { font-weight: inherit; color: var(--fill, var(--section-text)); }

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar);
  background: color-mix(in srgb, var(--ground) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  height: 100%;
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand { display: flex; align-items: center; gap: 0.6rem; color: var(--ink); flex: none; }
.brand:hover { text-decoration: none; }
.brand-name { font-family: var(--font-plate); font-weight: 860; font-stretch: 125%; font-size: 1.05rem; letter-spacing: 0.02em; }
.brand-sub { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim); padding-left: 0.6rem; border-left: 1px solid var(--line-strong); }

.libs { display: flex; gap: 0.25rem; margin-left: 0.5rem; }
.libs a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  height: 2.1rem;
  padding: 0 0.7rem;
  border-radius: var(--radius);
  color: var(--ink-dim);
  font-weight: 560;
  font-size: 0.9375rem;
}
.libs a:hover { color: var(--ink); background: var(--raised); text-decoration: none; }
.libs a[aria-current='page'] { color: var(--ink); background: var(--raised); box-shadow: inset 0 -2px 0 var(--fill); }

.topbar-tools { margin-left: auto; display: flex; align-items: center; gap: 0.5rem; }

.search {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  height: 2.1rem;
  width: 15rem;
  padding: 0 0.5rem 0 0.75rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-dim);
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}
.search:hover { border-color: var(--line-strong); }
.search kbd { margin-left: auto; font-size: 0.75rem; border: 1px solid var(--line-strong); border-radius: 0.25rem; padding: 0 0.3rem; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: none;
  color: var(--ink-dim);
  cursor: pointer;
}
.icon-btn:hover { color: var(--ink); background: var(--raised); }
.icon-btn svg { width: 1.15rem; height: 1.15rem; }
.menu-btn { display: none; }

/* ---------- buttons, chips ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 2.6rem;
  padding: 0 1.1rem;
  border-radius: var(--radius);
  font-weight: 640;
  font-size: 0.9375rem;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: var(--card);
}
.btn:hover { text-decoration: none; border-color: var(--ink-dim); }
.btn--hot { background: var(--section); border-color: var(--section); color: var(--mark-ink); }
.btn--hot:hover { border-color: var(--section); filter: brightness(1.08); }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0; margin: 0; list-style: none; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 1.6rem;
  padding: 0 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
  background: var(--card);
}
.chip strong { color: var(--ink); font-weight: 560; }
.chip .dot { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: #4fb36d; }

/* ---------- code ---------- */

.code {
  position: relative;
  margin: 0 0 1.25rem;
  background: var(--code);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.code pre { margin: 0; padding: 1rem 1.1rem; overflow-x: auto; line-height: 1.6; font-size: 0.8125rem; tab-size: 2; }
.code pre code { font-size: inherit; }

.code-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 2.5rem;
  padding: 0 0.4rem 0 1rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
}
.code-head .copy { margin-left: auto; }

.copy {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
  background: none;
  border: 1px solid transparent;
  border-radius: 0.3rem;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
}
.copy:hover { color: var(--ink); border-color: var(--line-strong); }
.copy.done { color: var(--section-text); }
.code > .copy { position: absolute; top: 0.5rem; right: 0.5rem; opacity: 0; transition: opacity 0.15s; background: var(--code); }
.code:hover > .copy, .code > .copy:focus-visible { opacity: 1; }

.tabs { display: flex; gap: 0.15rem; }
.tabs button {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-dim);
  background: none;
  border: 0;
  padding: 0.7rem 0.6rem 0.6rem;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected='true'] { color: var(--ink); border-bottom-color: var(--section); }
[data-runtime-panel][hidden] { display: none; }

.code pre { color: var(--ink); }
.code span[style*='--shiki-token-keyword'] { font-weight: 600; }
.code span[style*='--shiki-token-comment'] { font-style: italic; }

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

.footer { border-top: 1px solid var(--line); margin-top: 5rem; }
.footer-inner {
  max-width: var(--page);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 3rem;
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
  font-size: 0.9rem;
}
.footer h4 { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 0.75rem; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.footer a { color: var(--ink); }
.footer-brand p { color: var(--ink-dim); margin: 0.9rem 0 0; max-width: 22rem; }
.footer-legal { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--ink-dim); font-size: 0.8125rem; }

/* ---------- hub ---------- */

.hub { max-width: var(--page); margin: 0 auto; padding: 0 var(--gutter); }

.hub-hero { padding: 5rem 0 3rem; max-width: 52rem; }
.hub-hero h1 { font-size: clamp(2.4rem, 6.4vw, 4.6rem); font-weight: 920; font-stretch: 128%; letter-spacing: -0.025em; line-height: 0.98; margin: 1rem 0 1.5rem; }
.hub-hero h1 em { font-style: normal; color: var(--house); }
.hub-hero .lead { font-size: 1.25rem; color: var(--ink-dim); max-width: 40rem; }
.hub-hero .lead strong { color: var(--ink); font-weight: 560; }

.gate { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }

.lane {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 1.5);
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}
.lane:hover { border-color: var(--fill); }

.lane-plate {
  position: relative;
  background: var(--fill);
  color: var(--fill-ink);
  padding: 1.1rem 1.25rem 1.2rem;
  outline: 2px solid color-mix(in srgb, var(--fill-ink) 30%, transparent);
  outline-offset: -8px;
  border-radius: calc(var(--radius) * 1.5) calc(var(--radius) * 1.5) 0 0;
}
.lane-plate .no { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; opacity: 0.75; }
.lane-plate .wordmark { font-size: 2.35rem; margin: 1.4rem 0 0.35rem; color: var(--fill-ink); }
.lane-plate .what { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
.lane-plate .mark { position: absolute; top: 0.9rem; right: 1rem; width: 2.6rem; height: 2.6rem; }

.lane-body { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; flex: 1; }
.lane-body p { margin: 0; color: var(--ink-dim); }
.lane-body p strong { color: var(--ink); font-weight: 560; }
.lane-install { margin: 0; background: var(--code); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem 0.75rem; font-family: var(--font-mono); font-size: 0.75rem; overflow-x: auto; white-space: nowrap; color: var(--ink-dim); }
.lane-install .s { color: var(--fill); }
.lane-links { display: flex; gap: 1rem; margin-top: auto; padding-top: 0.25rem; font-size: 0.9375rem; font-weight: 600; }
.lane-links a { color: var(--ink); }
.lane-links a.go { color: var(--fill); }
.runtimes { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.runtimes span { font-family: var(--font-mono); font-size: 0.6875rem; padding: 0.1rem 0.45rem; border-radius: 0.3rem; background: var(--raised); color: var(--ink-dim); }

.band { padding: 4.5rem 0 0; }
.band-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 1.75rem; flex-wrap: wrap; }
.band-head h2 { margin: 0.5rem 0 0; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.band-head p { margin: 0; color: var(--ink-dim); max-width: 34rem; }

.principles { display: grid; grid-template-columns: 1fr 1.25fr; gap: 1rem; align-items: start; }
.principle-list { display: grid; gap: 1rem; }
.principle { padding: 1.1rem 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.principle h3 { margin: 0 0 0.35rem; font-size: 1.0625rem; }
.principle p { margin: 0; color: var(--ink-dim); font-size: 0.9375rem; }

.matrix-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: 0.9375rem; }
th, td { text-align: left; padding: 0.7rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-dim); white-space: nowrap; }
th small { display: block; font-size: 0.6875rem; opacity: 0.8; letter-spacing: 0; }
td .lib { display: flex; align-items: center; gap: 0.55rem; font-weight: 640; color: var(--ink); }
td .lib .mark { width: 1.25rem; height: 1.25rem; }
.yes { color: #4fb36d; font-family: var(--font-mono); }
.note { color: var(--ink-dim); font-size: 0.8125rem; }

.together { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 2rem; align-items: center; }
.together-pair { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.together-pair .mark { width: 2.25rem; height: 2.25rem; }
.together-pair .plus { color: var(--ink-dim); font-family: var(--font-mono); }

.adopters { display: flex; align-items: center; gap: 1.5rem; padding: 1.5rem 1.25rem; border: 1px dashed var(--line-strong); border-radius: var(--radius); color: var(--ink-dim); }
.adopters svg { color: var(--ink); height: 1.6rem; width: auto; }
.adopters .note { margin-left: auto; }

/* ---------- library pages ---------- */

.shell {
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr) 13rem;
  gap: 3rem;
}

.sidebar {
  position: sticky;
  top: var(--topbar);
  align-self: start;
  max-height: calc(100vh - var(--topbar));
  overflow-y: auto;
  padding: 1.75rem 0 2rem;
  font-size: 0.9rem;
}

.side-lib { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 1.25rem; color: var(--ink); }
.side-lib:hover { text-decoration: none; }
.side-lib .mark { width: 2rem; height: 2rem; }
.side-lib .wordmark { font-size: 1.3rem; }

.version {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 2.1rem;
  padding: 0 0.7rem;
  margin-bottom: 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.version .tag { color: var(--section-text); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; }

.nav-group { margin-bottom: 1.4rem; }
.nav-group h4 { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 0.5rem 0.75rem; }
.nav-group ul { list-style: none; margin: 0; padding: 0; }
.nav-group a { display: flex; align-items: center; justify-content: space-between; padding: 0.3rem 0.75rem; border-radius: 0.35rem; color: var(--ink-dim); border-left: 2px solid transparent; }
.nav-group a:hover { color: var(--ink); background: var(--raised); text-decoration: none; }
.nav-group a[aria-current='page'] { color: var(--ink); background: var(--section-soft); border-left-color: var(--section); border-radius: 0 0.35rem 0.35rem 0; font-weight: 600; }
.nav-group .ext::after { content: '↗'; font-size: 0.75rem; opacity: 0.6; }

.content { min-width: 0; width: 100%; padding: 1.75rem 0 2rem; max-width: var(--measure); margin-inline: auto; }

.crumbs { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim); margin-bottom: 1.25rem; }
.crumbs a { color: var(--ink-dim); }

.plate {
  position: relative;
  background: var(--section);
  color: var(--section-ink);
  border-radius: calc(var(--radius) * 2);
  padding: 1.5rem 1.75rem 1.6rem;
  outline: 2px solid color-mix(in srgb, var(--section-ink) 28%, transparent);
  outline-offset: -10px;
  overflow: hidden;
}
.plate-top { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.plate .wordmark { font-size: clamp(3rem, 9vw, 5.6rem); margin: 2.2rem 0 0.4rem; color: var(--section-ink); }
.plate .wordmark b { color: inherit; }
.plate-what { font-family: var(--font-mono); font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; }
.plate .mark { position: absolute; right: -1.5rem; bottom: -2.2rem; width: 13rem; height: 13rem; opacity: 0.14; --m-patch: var(--section-ink); --m-ink: var(--section); --m-rim: 0.6; }

.tagline { font-size: 1.3rem; line-height: 1.45; margin: 1.5rem 0 1rem; font-weight: 450; }
.lib-meta { margin-bottom: 2rem; }

.install .code-head { padding-left: 1rem; }
.install-note { font-size: 0.875rem; color: var(--ink-dim); margin: -0.5rem 0 1.5rem; }
.install-note[hidden] { display: none; }

.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; margin: 1.75rem 0 0; }
.fact { padding: 1rem 1.1rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.fact h3 { margin: 0 0 0.3rem; font-size: 1rem; display: flex; align-items: center; gap: 0.5rem; }
.fact h3::before { content: ''; width: 0.5rem; height: 0.5rem; border-radius: 2px; background: var(--section); transform: rotate(45deg); }
.fact p { margin: 0; color: var(--ink-dim); font-size: 0.9375rem; }

.flow { margin: 1.5rem 0 2rem; padding: 1.25rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); display: grid; grid-template-columns: 1fr auto 1.15fr; gap: 0.75rem 1rem; align-items: center; font-size: 0.8125rem; }
.flow-col { display: grid; gap: 0.6rem; }
.node { border: 1px solid var(--line-strong); background: var(--raised); border-radius: 0.4rem; padding: 0.55rem 0.7rem; line-height: 1.35; }
.node b { display: block; font-family: var(--font-mono); font-weight: 600; font-size: 0.75rem; color: var(--ink); }
.node span { color: var(--ink-dim); font-size: 0.75rem; }
.node em { display: block; font-style: normal; font-family: var(--font-mono); font-size: 0.6875rem; color: var(--section-text); margin-top: 0.2rem; }
.node--core { border-color: var(--section); background: var(--section-soft); padding: 0.9rem; }
.node--core ul { margin: 0.5rem 0 0; padding-left: 1rem; color: var(--ink-dim); font-size: 0.75rem; }
.flow-arrow { color: var(--ink-dim); font-family: var(--font-mono); }
.flow-caption { grid-column: 1 / -1; color: var(--ink-dim); font-size: 0.75rem; font-family: var(--font-mono); border-top: 1px solid var(--line); padding-top: 0.75rem; }

.callout { border-left: 3px solid var(--section); background: var(--section-soft); padding: 0.9rem 1.1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 0 0 1.25rem; font-size: 0.9375rem; }
.callout p:last-child { margin: 0; }

.next-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.next-card { display: block; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--ink); }
.next-card:hover { border-color: var(--section); text-decoration: none; }
.next-card b { display: block; font-family: var(--font-plate); font-weight: 700; margin-bottom: 0.2rem; }
.next-card span { color: var(--ink-dim); font-size: 0.875rem; }

.page-foot { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: 0.8125rem; color: var(--ink-dim); font-family: var(--font-mono); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 1.5rem; }
.pager a { padding: 0.9rem 1.1rem; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); }
.pager a:hover { border-color: var(--section); text-decoration: none; }
.pager small { display: block; font-family: var(--font-mono); font-size: 0.6875rem; color: var(--ink-dim); text-transform: uppercase; letter-spacing: 0.08em; }
.pager .next { text-align: right; grid-column: 2; }
.pager b { font-family: var(--font-plate); font-weight: 700; }

.toc { position: sticky; top: var(--topbar); align-self: start; padding: 1.9rem 0; font-size: 0.8125rem; }
.toc h4 { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 0.75rem; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc a { display: block; padding: 0.25rem 0 0.25rem 0.85rem; margin-left: -1px; border-left: 1px solid transparent; color: var(--ink-dim); }
.toc a:hover { color: var(--ink); text-decoration: none; }
.toc a.active { color: var(--ink); border-left-color: var(--section); }
.toc .sub a { padding-left: 1.6rem; }
.toc-extra { margin-top: 1.5rem; display: grid; gap: 0.4rem; }
.toc-extra a { color: var(--ink-dim); }

/* ---------- prose: what each library's markdown renders to ---------- */

.doc-title { font-size: clamp(2rem, 4.4vw, 2.8rem); font-weight: 880; font-stretch: 118%; letter-spacing: -0.02em; margin: 0 0 1.75rem; }
.doc-title code, .prose h2 code, .prose h3 code { font-size: 0.82em; }

.prose > :first-child { margin-top: 0; }
.prose h4 { font-size: 1rem; font-weight: 700; margin: 1.75rem 0 0.6rem; }
.prose h5, .prose h6 { font-size: 0.9375rem; font-weight: 700; margin: 1.5rem 0 0.5rem; }
.prose h4:hover .anchor, .prose h5:hover .anchor { opacity: 1; }
.prose strong { font-weight: 640; }
.prose ul, .prose ol { margin: 0 0 1rem; padding-left: 1.4rem; }
.prose li { margin: 0.3rem 0; }
.prose li > p { margin: 0 0 0.5rem; }
.prose li::marker { color: var(--ink-dim); }
.prose blockquote {
  margin: 0 0 1.25rem;
  padding: 0.8rem 1.1rem;
  border-left: 3px solid var(--section);
  background: var(--section-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.prose blockquote > :last-child { margin-bottom: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.prose img { max-width: 100%; height: auto; }
.prose picture img { display: block; }
.prose details { margin: 0 0 1rem; padding: 0.6rem 0.9rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.prose summary { cursor: pointer; font-weight: 600; }

.table-wrap { overflow-x: auto; margin: 0 0 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.table-wrap table { font-size: 0.875rem; }
.table-wrap th { white-space: normal; }
/* In a cell, a name broken mid-word reads worse than a table that scrolls sideways. */
.table-wrap :not(pre) > code { overflow-wrap: normal; white-space: nowrap; }

/* Until mermaid has drawn a diagram, and without scripts, its source stays readable. */
.diagram { margin: 1.5rem 0 2rem; padding: 1.25rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow-x: auto; }
.diagram pre.mermaid { margin: 0; font-size: 0.8125rem; color: var(--ink-dim); white-space: pre; }
.diagram pre.mermaid[data-processed] { white-space: normal; }
.diagram svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }

/* ---------- search ---------- */

.search-dialog {
  width: min(40rem, calc(100vw - 2rem));
  max-height: min(36rem, calc(100vh - 6rem));
  margin: 5rem auto auto;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: calc(var(--radius) * 1.5);
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 24px 60px rgb(0 0 0 / 0.45);
  overflow: hidden;
}
.search-dialog[open] { display: flex; flex-direction: column; }
.search-dialog::backdrop { background: rgb(0 0 0 / 0.55); }
.search-box { display: flex; align-items: center; gap: 0.7rem; padding: 0.75rem 0.9rem; border-bottom: 1px solid var(--line); color: var(--ink-dim); }
.search-box input[type='search'] { flex: 1; min-width: 0; background: none; border: 0; outline: 0; color: var(--ink); font: inherit; font-size: 1.05rem; }
.search-box input[type='search']::-webkit-search-cancel-button { display: none; }
.search-scope { display: flex; align-items: center; gap: 0.35rem; font-family: var(--font-mono); font-size: 0.75rem; white-space: nowrap; cursor: pointer; }
.search-scope input { accent-color: var(--section); margin: 0; }
.search-close { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--ink-dim); background: none; border: 1px solid var(--line-strong); border-radius: 0.25rem; padding: 0.1rem 0.35rem; cursor: pointer; }
.search-results { list-style: none; margin: 0; padding: 0.4rem; overflow-y: auto; }
.search-results:empty { display: none; }
.search-results a { display: block; padding: 0.6rem 0.75rem; border-radius: 0.4rem; color: var(--ink); }
.search-results a:hover, .search-results a:focus-visible { background: var(--raised); text-decoration: none; outline: 0; }
.search-results b { font-family: var(--font-plate); font-weight: 680; }
.search-results .sub { color: var(--ink-dim); }
.search-results p { margin: 0.2rem 0 0; color: var(--ink-dim); font-size: 0.875rem; line-height: 1.5; }
.search-results mark { background: none; color: var(--section-text); font-weight: 650; }
.search-lib { display: inline-block; font-family: var(--font-mono); font-size: 0.6875rem; padding: 0 0.4rem; margin-right: 0.5rem; border-radius: 0.25rem; background: var(--raised); color: var(--ink-dim); vertical-align: 0.1em; }
.search-status { margin: 0; padding: 0.6rem 1.15rem 0.75rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim); }
.search-status:empty { display: none; }

.gate-mini { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; }

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  .shell { grid-template-columns: 14rem minmax(0, 1fr); gap: 2.5rem; }
  .toc { display: none; }
  .search { width: 2.1rem; padding: 0; justify-content: center; }
  .search span, .search kbd { display: none; }
}

@media (max-width: 960px) {
  .gate { grid-template-columns: 1fr; }
  .principles, .together { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .libs { display: none; }
  .menu-btn { display: grid; }
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    inset: var(--topbar) auto 0 0;
    /* align-self: start from the desktop grid would size a fixed box to its content and ignore bottom: 0. */
    align-self: stretch;
    width: min(20rem, 86vw);
    max-height: none;
    background: var(--ground);
    border-right: 1px solid var(--line);
    padding: 1.25rem 1rem 2rem;
    transform: translateX(-100%);
    transition: transform 0.2s;
    z-index: 15;
  }
  body.nav-open .sidebar { transform: none; }
  .sidebar .mobile-libs { display: grid; }
  .flow { grid-template-columns: 1fr; }
  .flow-arrow { transform: rotate(90deg); justify-self: center; }
}

.mobile-libs { display: none; gap: 0.25rem; margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--line); }
.mobile-libs a { display: flex; align-items: center; gap: 0.6rem; padding: 0.4rem 0.5rem; border-radius: 0.35rem; color: var(--ink-dim); font-weight: 600; }
.mobile-libs a[aria-current='page'] { color: var(--ink); background: var(--raised); }
.mobile-libs .mark { width: 1.2rem; height: 1.2rem; }

@media (max-width: 640px) {
  .brand-sub { display: none; }
  .hub-hero { padding: 3rem 0 2rem; }
  .facts, .next-cards, .gate-mini { grid-template-columns: 1fr; }
  .search-box { flex-wrap: wrap; }
  .search-scope { order: 3; flex-basis: 100%; padding-left: 1.8rem; }
  .plate { padding: 1.2rem 1.25rem 1.3rem; }
  .plate .mark { width: 9rem; height: 9rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .tagline { font-size: 1.15rem; }
  .band { padding-top: 3.5rem; }
}

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