/* rails-ai-context site. Tokens first; the dark set is applied by the system unless the reader picks one. */

:root {
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --bg: #fcfbf9;
  --bg-alt: #f5f3ee;
  --surface: #ffffff;
  --code-bg: #f6f4ef;
  --line: #e6e1d8;
  --line-strong: #cfc8ba;
  --text: #1b1917;
  --muted: #55504b;
  --faint: #6e6861;
  --accent: #b4132c;
  --accent-ink: #8e0f23;
  --accent-soft: #fbe6e9;
  --ok: #0f766e;
  --ok-soft: #dcf3ee;
  --warn: #a16207;
  --warn-soft: #fdf3dc;
  --grid: rgba(27, 25, 23, 0.07);
  --btn-bg: #1b1917;
  --btn-text: #fcfbf9;
  --shadow: 0 1px 2px rgba(27, 25, 23, 0.05), 0 12px 32px -12px rgba(27, 25, 23, 0.14);
  --radius: 12px;
  --radius-sm: 7px;
  --wrap: 1140px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121010;
    --bg-alt: #171413;
    --surface: #1d1918;
    --code-bg: #161312;
    --line: #302927;
    --line-strong: #473d3a;
    --text: #f0ebe6;
    --muted: #b3a9a2;
    --faint: #918780;
    --accent: #ff6e80;
    --accent-ink: #ff9ba8;
    --accent-soft: rgba(255, 110, 128, 0.14);
    --ok: #5eead4;
    --ok-soft: rgba(94, 234, 212, 0.14);
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, 0.14);
    --grid: rgba(240, 235, 230, 0.06);
    --btn-bg: #f0ebe6;
    --btn-text: #121010;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 16px 40px -16px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #121010;
  --bg-alt: #171413;
  --surface: #1d1918;
  --code-bg: #161312;
  --line: #302927;
  --line-strong: #473d3a;
  --text: #f0ebe6;
  --muted: #b3a9a2;
  --faint: #918780;
  --accent: #ff6e80;
  --accent-ink: #ff9ba8;
  --accent-soft: rgba(255, 110, 128, 0.14);
  --ok: #5eead4;
  --ok-soft: rgba(94, 234, 212, 0.14);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.14);
  --grid: rgba(240, 235, 230, 0.06);
  --btn-bg: #f0ebe6;
  --btn-text: #121010;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 16px 40px -16px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

/* Base */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 76px;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.65 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-ink); }

code, pre, kbd { font-family: var(--font-mono); font-size: 0.875em; }

:not(pre) > code {
  padding: 0.12em 0.36em;
  border-radius: 5px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  font-size: 0.84em;
  overflow-wrap: anywhere;
}

h1, h2, h3 { margin: 0; line-height: 1.1; letter-spacing: -0.025em; font-weight: 700; }

p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.sr {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip {
  position: absolute;
  left: 12px; top: -48px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--btn-bg);
  color: var(--btn-text);
  font-weight: 600;
  text-decoration: none;
}
.skip:focus { top: 12px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.narrow { max-width: 820px; }

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: 600 0.95rem/1 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s, color 0.15s, transform 0.15s;
}
.btn:hover { border-color: var(--text); color: var(--text); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  border-color: var(--btn-bg);
  background: var(--btn-bg);
  color: var(--btn-text);
}
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: #fff; }

.btn-small { min-height: 36px; padding: 0 12px; font-size: 0.875rem; }

/* Navigation */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
}

.nav-row {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand:hover { color: var(--text); }

.nav-links { margin-left: auto; }

.nav-links ul {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.925rem;
  font-weight: 500;
  text-decoration: none;
}
.nav-links a:hover, .nav-links a[aria-current="true"], .nav-links a[aria-current="page"] { color: var(--text); background: var(--bg-alt); }

.menu { display: none; }

.nav-actions { display: flex; align-items: center; gap: 8px; }

.theme {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}
.theme svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.theme .i-moon { fill: currentColor; stroke: none; }
.theme .i-sun { display: none; }
:root[data-theme="dark"] .theme .i-sun { display: block; }
:root[data-theme="dark"] .theme .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme .i-moon { display: none; }
}

/* Shared section shapes */

.section { padding: 112px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); }
.section-head .lede { margin-top: 16px; }

.eyebrow {
  margin-bottom: 14px;
  color: var(--accent);
  font: 600 0.8125rem/1.2 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.eyebrow .as-is { text-transform: none; }

.lede { color: var(--muted); font-size: 1.1875rem; line-height: 1.6; }

.ticks { margin: 20px 0 0; padding: 0; list-style: none; color: var(--muted); }
.ticks li { position: relative; padding-left: 24px; margin-top: 8px; }
.ticks li::before {
  content: "";
  position: absolute;
  left: 2px; top: 0.62em;
  width: 10px; height: 2px;
  background: var(--accent);
}

/* Hero */

.hero {
  position: relative;
  padding: 88px 0 104px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--grid) 1.2px, transparent 1.2px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 30% 20%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 30% 20%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.4vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 750;
}

.hero .lede { margin-top: 24px; }
.lede-2 { margin-top: 14px; color: var(--text); font-weight: 500; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* Terminal-styled command blocks with a copy button */

.term {
  position: relative;
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--code-bg);
}
.term pre {
  margin: 0;
  padding: 16px 92px 16px 18px;
  overflow-x: auto;
  line-height: 1.7;
}
.term .p { color: var(--accent); user-select: none; }
.term .c { color: var(--faint); }
.term.small { margin-top: 10px; }
.term.small pre { padding-top: 12px; padding-bottom: 12px; }
.term.prompt pre { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 0.8rem; line-height: 1.6; max-height: 420px; overflow-y: auto; }

.copy {
  position: absolute;
  top: 10px; right: 10px;
  min-width: 64px;
  height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
  font: 600 0.78rem/1 var(--font-sans);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.copy:hover { color: var(--text); border-color: var(--text); }
.copy[data-done] { color: var(--ok); border-color: var(--ok); }
html:not(.js) .copy { display: none; }

/* Plates: an answer drawn like the plate of an atlas, with a key */

.plate, .anatomy {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.plate-head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font: 500 0.78rem/1.3 var(--font-mono);
  color: var(--muted);
  background: linear-gradient(90deg, #e11d48, #be123c 55%, #f97316) top / 100% 2px no-repeat, var(--surface);
}
.plate-head span:first-child {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plate-body {
  margin: 0;
  padding: 18px 18px 18px 54px;
  font-size: 0.8rem;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--text);
  background: var(--code-bg);
}
.plate-body .row { position: relative; display: block; }
.plate-body .row.dim { color: var(--faint); }
.plate-body i {
  position: absolute;
  left: -38px; top: 0.05em;
  display: grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--surface);
  font: 700 0.7rem/1 var(--font-sans);
  font-style: normal;
}

.plate-key {
  margin: 0;
  padding: 16px 18px 4px 18px;
  list-style: none;
  counter-reset: key;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 22px;
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--muted);
}
.plate-key li { position: relative; padding-left: 30px; counter-increment: key; }
.plate-key li::before {
  content: counter(key);
  position: absolute;
  left: 0; top: 0.05em;
  display: grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font: 700 0.7rem/1 var(--font-sans);
}

.plate figcaption, .panel figcaption {
  padding: 12px 18px 16px;
  font-size: 0.82rem;
  color: var(--faint);
}

/* Tags, as the answers print them */

.tag {
  display: inline-block;
  padding: 0.05em 0.45em;
  border-radius: 4px;
  font: 700 0.78em/1.5 var(--font-mono);
  letter-spacing: 0.02em;
}
.tag-ok { color: var(--ok); background: var(--ok-soft); }
.tag-warn { color: var(--warn); background: var(--warn-soft); }
.tag-off { color: var(--muted); background: var(--bg-alt); border: 1px solid var(--line); }

/* The problem: without and with */

.compare {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  border-top: 1px solid var(--line-strong);
}
.compare > div { padding: 18px 20px 18px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 0.98rem; }
.compare .ask { color: var(--text); font-weight: 600; }
.compare .head { padding-top: 14px; padding-bottom: 10px; font: 600 0.78rem/1.2 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
.compare .without { color: var(--muted); }
.compare .with { color: var(--text); }
.compare .with::before, .compare .without::before {
  content: "";
  display: inline-block;
  width: 8px; height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  vertical-align: 1px;
}
.compare .without::before { background: var(--accent); opacity: 0.55; }
.compare .with::before { background: var(--ok); }
.compare .head::before { display: none; }

/* Answer steps */

.steps {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.step-list {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 2px;
}
.step-list::before {
  content: "";
  position: absolute;
  left: 21px; top: 26px; bottom: 26px;
  width: 2px;
  background: var(--line);
}

.step-list a {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 12px 12px 12px 8px;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
}
.step-list a:hover { background: var(--surface); }
.step-list a[aria-selected="true"] { background: var(--surface); box-shadow: var(--shadow); }

.step-n {
  position: relative;
  display: grid;
  place-items: center;
  flex: none;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background: var(--bg-alt);
  color: var(--muted);
  font: 700 0.78rem/1 var(--font-mono);
}
.step-list a[aria-selected="true"] .step-n { border-color: var(--accent); background: var(--accent); color: var(--surface); }

.step-t { display: grid; line-height: 1.3; }
.step-t strong { font-size: 0.98rem; }
.step-t small { color: var(--faint); font-size: 0.84rem; font-family: var(--font-mono); }

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel + .panel { margin-top: 24px; }
.js .panel + .panel { margin-top: 0; }
.panel > h3 { padding: 24px 24px 0; font-size: 1.3rem; }
.panel > p { padding: 10px 24px 18px; color: var(--muted); }
.panel figure { margin: 0; }
.panel figcaption { border-top: 1px solid var(--line); }
.panel .cmd {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 10px 24px;
  border-top: 1px solid var(--line);
  background: var(--bg-alt);
  font: 500 0.78rem/1.5 var(--font-mono);
  color: var(--muted);
  overflow-x: auto;
  white-space: nowrap;
}
.panel .cmd .p { color: var(--accent); }
@media (prefers-reduced-motion: no-preference) {
  .js .panel:not([hidden]) { animation: panel-in 0.28s ease-out; }
}
@keyframes panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.code {
  margin: 0;
  padding: 18px 24px;
  overflow-x: auto;
  background: var(--code-bg);
  font-size: 0.8rem;
  line-height: 1.65;
  tab-size: 2;
}
.code + .code { border-top: 1px dashed var(--line-strong); }
.code.scroll { max-height: 460px; overflow-y: auto; }
.code.wrap-lines { white-space: pre-wrap; overflow-wrap: anywhere; }

.aside {
  margin-top: 40px;
  max-width: 820px;
  padding-left: 18px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}
.aside strong { color: var(--text); }

/* Tools */

.tools {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 40px;
}
.tool-group h3 {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  font-family: var(--font-mono);
}
.tool-group ul { margin: 0; padding: 0; list-style: none; }
.tool-group li {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}
.tool-group li a { text-decoration: none; }
.tool-group li a code { color: var(--text); font-weight: 600; background: transparent; border: 0; padding: 0; font-size: 0.86em; }
.tool-group li a:hover code { color: var(--accent); text-decoration: underline; }

.tools-note { margin-top: 28px; max-width: 820px; color: var(--muted); }

/* How it works */

.flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.flow-col {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.flow-col h3 { font-size: 1.15rem; margin-bottom: 18px; }
.flow-col ol { margin: 0; padding: 0; list-style: none; counter-reset: flow; }
.flow-col li {
  position: relative;
  padding: 0 0 18px 42px;
  counter-increment: flow;
  color: var(--muted);
  font-size: 0.96rem;
}
.flow-col li:last-child { padding-bottom: 0; }
.flow-col li::before {
  content: counter(flow);
  position: absolute;
  left: 0; top: 0;
  display: grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1.5px solid var(--line-strong);
  background: var(--surface);
  color: var(--muted);
  font: 700 0.74rem/1 var(--font-mono);
  z-index: 1;
}
.flow-col li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 12px; top: 28px; bottom: 2px;
  width: 2px;
  background: var(--line);
}
.flow-col li strong { color: var(--text); font-weight: 600; }

.anatomy { margin-top: 32px; }
.claim {
  padding: 40px 24px 12px;
  text-align: center;
  font-size: clamp(1rem, 2.4vw, 1.45rem);
}
.claim code { border: 0; background: none; padding: 0; font-size: 1em; }
.claim .k {
  display: inline-block;
  padding: 0 0.18em;
  border-bottom: 3px solid var(--accent);
  color: var(--accent);
  font-weight: 800;
}
.claim-key {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 18px 24px 0;
  border-top: 1px solid var(--line);
}
.claim-key > div { padding: 18px 16px 4px 0; }
.claim-key > div + div { padding-left: 16px; border-left: 1px solid var(--line); }
.claim-key dt { font-weight: 700; font-size: 0.95rem; }
.claim-key dd { margin: 6px 0 0; color: var(--muted); font-size: 0.88rem; }
.anatomy-note { padding: 18px 24px 24px; color: var(--muted); font-size: 0.95rem; border-top: 1px solid var(--line); margin-top: 18px; }

/* Install */

.install {
  display: grid;
  gap: 12px;
  max-width: 820px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.install li {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.install li > div {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  min-width: 0;
  flex: 1;
}
.install h3 { font-size: 1.02rem; }
.install .term.small { margin-top: 0; }
.install-n {
  display: grid;
  place-items: center;
  flex: none;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--btn-bg);
  color: var(--btn-text);
  font: 700 0.85rem/1 var(--font-mono);
}

.install-more {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  margin-top: 48px;
}
.install-more h3 { font-size: 1.15rem; }

.cmds { margin: 16px 0 0; }
.cmds > div { display: grid; grid-template-columns: 172px minmax(0, 1fr); gap: 12px; padding: 9px 0; border-top: 1px solid var(--line); }
.cmds dt code { font-weight: 600; }
.cmds dd { margin: 0; color: var(--muted); font-size: 0.95rem; }

.clients { width: 100%; margin-top: 16px; border-collapse: collapse; font-size: 0.92rem; }
.clients th, .clients td { padding: 10px 12px 10px 0; text-align: left; vertical-align: top; border-top: 1px solid var(--line); }
.clients th { font-weight: 600; white-space: nowrap; }
.clients td { color: var(--muted); }

.more {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.install-more + .more { margin-top: 48px; }
.more summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
}
.more[open] summary { border-bottom: 1px solid var(--line); }
.more .term { margin: 18px 20px 0; }
.more p { padding: 14px 20px 18px; color: var(--muted); font-size: 0.95rem; }

/* Limits and questions */

.limits-grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 48px; }
.limits { margin: 0; padding: 0; list-style: none; }
.limits li {
  padding: 18px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.limits li:last-child { border-bottom: 1px solid var(--line); }
.limits strong { display: block; color: var(--text); margin-bottom: 4px; }

.faq details {
  border-top: 1px solid var(--line-strong);
}
.faq details:last-child { border-bottom: 1px solid var(--line-strong); }
.faq summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  flex: none;
  font: 400 1.4rem/1 var(--font-mono);
  color: var(--accent);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 0 22px; color: var(--muted); max-width: 68ch; }

/* Footer */

.footer {
  padding: 56px 0 64px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
}
.brand-line strong { font-size: 1.1rem; letter-spacing: -0.02em; }
.brand-line span { margin-left: 8px; color: var(--faint); font-family: var(--font-mono); font-size: 0.85rem; }
.fine { margin-top: 10px; color: var(--faint); font-size: 0.86rem; }
.footer h2 { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin-bottom: 12px; font-family: var(--font-mono); }
.footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); text-decoration: underline; }

/* Docs pages */

.docs-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  padding: 40px 0 96px;
  align-items: start;
}
.docs-nav { position: sticky; top: 88px; }
.docs-nav h2 { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin-bottom: 10px; font-family: var(--font-mono); }
.docs-nav ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.docs-nav a { display: block; padding: 6px 10px; border-radius: var(--radius-sm); color: var(--muted); font-size: 0.92rem; text-decoration: none; }
.docs-nav a:hover { color: var(--text); background: var(--bg-alt); }
.docs-nav a[aria-current="page"] { color: var(--text); background: var(--surface); box-shadow: var(--shadow); font-weight: 600; }
.docs-nav .source { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 0.84rem; color: var(--faint); }

.doc { min-width: 0; max-width: 820px; font-size: 1rem; }
.doc h1 { font-size: clamp(1.9rem, 3.4vw, 2.5rem); margin: 0 0 14px; }
.doc h2 { font-size: 1.5rem; margin: 48px 0 14px; padding-top: 18px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 1.18rem; margin: 32px 0 10px; }
.doc h4, .doc h5, .doc h6 { font-size: 1rem; margin: 24px 0 8px; }
.doc p, .doc ul, .doc ol { margin: 0 0 14px; }
.doc li { margin: 4px 0; }
.doc li > p { margin-bottom: 6px; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.doc img { border-radius: var(--radius-sm); }
.doc table { width: 100%; margin: 0 0 18px; border-collapse: collapse; font-size: 0.92rem; }
.doc th, .doc td { padding: 8px 10px; text-align: left; vertical-align: top; border: 1px solid var(--line); }
.doc th { background: var(--bg-alt); font-weight: 600; }
.doc .table-wrap { overflow-x: auto; }
.doc pre {
  margin: 0 0 16px;
  padding: 16px 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--code-bg);
  font-size: 0.82rem;
  line-height: 1.6;
}
.doc pre code { font-size: 1em; }
.doc div.highlighter-rouge { margin: 0 0 16px; }
.doc div.highlighter-rouge pre { margin: 0; }
.doc blockquote { margin: 0 0 16px; padding: 10px 18px; border-left: 3px solid var(--line-strong); color: var(--muted); }
.doc blockquote p:last-child { margin-bottom: 0; }
.doc blockquote.alert { border-left-color: var(--accent); background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.doc blockquote.alert-tip { border-left-color: var(--ok); }
.doc blockquote.alert-warning, .doc blockquote.alert-caution { border-left-color: var(--warn); }
.doc .alert-title { display: block; margin-bottom: 4px; color: var(--text); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; }
.doc details { margin: 0 0 14px; padding: 0 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.doc details > summary { padding: 12px 0; cursor: pointer; font-weight: 600; }
.doc details[open] > summary { border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.doc div[align="center"] h1 { margin-top: 8px; }
.doc div[align="center"] p { color: var(--muted); }
.doc p[align="right"] { font-size: 0.82rem; }
.doc .mermaid { margin: 0 0 16px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); overflow-x: auto; }
.doc .mermaid svg { margin: 0 auto; }

/* Rouge tokens, the few that read: keywords, strings, comments, names, numbers */

.highlight .c, .highlight .c1, .highlight .cm, .highlight .cp { color: var(--faint); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .nt { color: var(--accent); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sh, .highlight .si, .highlight .sr, .highlight .sx, .highlight .ss, .highlight .dl { color: var(--ok); }
.highlight .n, .highlight .nb, .highlight .nf, .highlight .nn, .highlight .nx, .highlight .vi, .highlight .vg, .highlight .nv { color: var(--text); }
.highlight .nc, .highlight .no, .highlight .na { color: var(--warn); }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .il { color: var(--warn); }
.highlight .o, .highlight .p { color: var(--muted); }
.highlight .gd { color: var(--accent); background: var(--accent-soft); }
.highlight .gi { color: var(--ok); background: var(--ok-soft); }
.highlight .err { color: inherit; background: transparent; }

/* Reveal on scroll, only where script runs and motion is welcome */

@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
  .js .reveal.in { opacity: 1; transform: none; }
}

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

/* Without script every panel shows, under its own heading. */
html:not(.js) .step-list { display: none; }
html:not(.js) .steps { grid-template-columns: minmax(0, 1fr); }

/* Narrower screens */

@media (max-width: 1020px) {
  .hero-grid, .limits-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { gap: 48px; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .step-list {
    position: static;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }
  .step-list::before { display: none; }
  .step-list a { flex: none; padding: 10px 12px; border: 1px solid var(--line); background: var(--surface); }
  .install li > div { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .docs-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .docs-nav { position: static; }
  .docs-nav ul { display: flex; flex-wrap: wrap; gap: 6px; }
  .docs-nav a { border: 1px solid var(--line); background: var(--surface); }
}

@media (max-width: 760px) {
  body { font-size: 1rem; }
  .wrap { padding: 0 16px; }
  .section { padding: 72px 0; }
  .hero { padding: 48px 0 64px; }
  .section-head { margin-bottom: 32px; }
  .lede { font-size: 1.0625rem; }

  .menu {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 12px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text);
    font: 600 0.875rem/1 var(--font-sans);
    cursor: pointer;
  }
  .nav-row { gap: 10px; }
  .nav-links { margin-left: auto; }
  .nav-links ul {
    position: absolute;
    left: 0; right: 0; top: 64px;
    display: none;
    flex-direction: column;
    padding: 8px 16px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav-links ul[data-open] { display: flex; }
  html:not(.js) .nav-links ul { display: none; }
  html:not(.js) .menu { display: none; }
  .nav-links a { padding: 12px 8px; font-size: 1rem; }
  .nav-actions .btn span { display: none; }
  .nav-actions .btn { padding: 0 10px; }

  .compare { grid-template-columns: minmax(0, 1fr); border-top: 0; }
  .compare .head { display: none; }
  .compare > div { padding: 6px 0; border-bottom: 0; }
  .compare .ask { padding-top: 18px; }
  .compare .with { padding-bottom: 18px; border-bottom: 1px solid var(--line); }

  .plate-key { grid-template-columns: minmax(0, 1fr); }
  .plate-body { padding-left: 46px; font-size: 0.74rem; }
  .plate-body i { left: -32px; }

  .tools { grid-template-columns: minmax(0, 1fr); }
  .tool-group li { grid-template-columns: minmax(0, 1fr); gap: 2px; }

  .flow, .install-more { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .flow-col { padding: 22px; }
  .claim { padding-top: 28px; }
  .claim-key { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); margin: 12px 16px 0; }
  .claim-key > div:nth-child(3) { padding-left: 0; border-left: 0; }
  .claim-key > div:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .anatomy-note { padding: 16px; }

  .cmds > div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .clients thead { display: none; }
  .clients, .clients tbody, .clients tr, .clients th, .clients td { display: block; width: 100%; }
  .clients th { border-top: 1px solid var(--line); padding-bottom: 2px; }
  .clients td { border-top: 0; padding-top: 0; padding-bottom: 12px; }
  .term pre { padding-right: 18px; padding-top: 48px; white-space: pre-wrap; overflow-wrap: anywhere; }
  .term.small pre { padding-top: 46px; }
  .install li { align-items: flex-start; }
  .panel > h3 { padding: 20px 18px 0; font-size: 1.15rem; }
  .panel > p { padding: 8px 18px 16px; }
  .panel .cmd { padding: 10px 18px; white-space: normal; overflow-wrap: anywhere; }
  .code { padding: 16px 18px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doc table { display: block; overflow-x: auto; }
}