/* ==========================================================================
   Ferrule — design system
   Serif for headings (technical-manual feel), sans for body copy,
   mono for UI chrome / code / labels. Flat panels with drafting-style
   corner brackets instead of shadows. Two accents: brass + verdigris.
   ========================================================================== */

:root {
  color-scheme: dark;

  --bg: #101a1c;
  --bg-raised: #162325;
  --bg-sunken: #0b1315;
  --ink: #e9e7df;
  --ink-soft: #c7c9c2;
  --muted: #8fa19d;
  --accent: #cf9a4c;
  --accent-strong: #e3b46a;
  --accent-2: #6bb3a4;
  --accent-2-strong: #86c9ba;
  --rust: #c97455;
  --border: #2c3d3f;
  --border-strong: #46605f;
  --focus: #e3b46a;
  --on-accent: #14100a;

  --code-bg: #0c1517;
  --code-ink: #e9e7df;
  --code-border: #263638;

  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Noto Serif", Georgia, ui-serif, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --fs-100: 0.8125rem;
  --fs-200: 0.9375rem;
  --fs-300: 1rem;
  --fs-400: 1.125rem;
  --fs-500: 1.375rem;
  --fs-600: 1.875rem;
  --fs-700: clamp(2.5rem, 4vw + 1.2rem, 3.75rem);

  --maxw: 72rem;
  --radius: 3px;
  --tick: 14px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #eef0e8;
  --bg-raised: #ffffff;
  --bg-sunken: #e2e5da;
  --ink: #1c2624;
  --ink-soft: #34423e;
  --muted: #57655f;
  --accent: #8a5a1f;
  --accent-strong: #6e4818;
  --accent-2: #256454;
  --accent-2-strong: #1c4d41;
  --rust: #a1502f;
  --border: #c7cdbc;
  --border-strong: #a9b29d;
  --focus: #6e4818;
  --on-accent: #fbf9f3;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #eef0e8;
    --bg-raised: #ffffff;
    --bg-sunken: #e2e5da;
    --ink: #1c2624;
    --ink-soft: #34423e;
    --muted: #57655f;
    --accent: #8a5a1f;
    --accent-strong: #6e4818;
    --accent-2: #256454;
    --accent-2-strong: #1c4d41;
    --rust: #a1502f;
    --border: #c7cdbc;
    --border-strong: #a9b29d;
    --focus: #6e4818;
    --on-accent: #fbf9f3;
  }
}

/* ---------------------------------------------------------------------- */
/* Reset                                                                   */
/* ---------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-300);
  line-height: 1.6;
  transition: background-color .2s ease, color .2s ease;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; }
ul, ol { padding-left: 1.25em; }
table { border-collapse: collapse; width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-700); }
h2 { font-size: var(--fs-600); }
h3 { font-size: var(--fs-500); }
h4 { font-size: var(--fs-400); font-family: var(--font-sans); font-weight: 700; }

p { margin: 0 0 1em; }
small, .fs-100 { font-size: var(--fs-100); }

code, pre, kbd { font-family: var(--font-mono); }
code { font-size: .875em; background: var(--bg-sunken); border: 1px solid var(--border); border-radius: var(--radius); padding: .1em .35em; }
kbd { font-size: .8em; background: var(--bg-sunken); border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: var(--radius); padding: .05em .4em; }

::selection { background: var(--accent); color: var(--on-accent); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0; margin: -1px; padding: 0;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--accent);
  color: var(--on-accent);
  padding: .6em 1em;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  z-index: 1000;
  transition: top .15s ease;
}
.skip-link:focus { top: 1rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto !important; }
}
html { scroll-behavior: smooth; }

/* subtle drafting-paper grid, very low contrast, decorative only */
body {
  background-image:
    linear-gradient(color-mix(in srgb, var(--border) 55%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 55%, transparent) 1px, transparent 1px);
  background-size: 42px 42px;
  background-attachment: fixed;
  background-color: var(--bg);
}

/* ---------------------------------------------------------------------- */
/* Layout primitives                                                       */
/* ---------------------------------------------------------------------- */

.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section { padding-block: clamp(2.5rem, 5vw, 4.5rem); }
.section--tight { padding-block: clamp(1.5rem, 3vw, 2.5rem); }
.section-head { max-width: 46rem; margin-bottom: 2rem; }
.section-head p { color: var(--ink-soft); font-size: var(--fs-400); }

.rule { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

.tag-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--accent);
  letter-spacing: .02em;
}

/* Bracket / corner-frame decoration used instead of card shadows */
.bracket {
  position: relative;
  background:
    linear-gradient(var(--accent), var(--accent)) top left / var(--tick) 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top left / 2px var(--tick) no-repeat,
    linear-gradient(var(--accent), var(--accent)) top right / var(--tick) 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top right / 2px var(--tick) no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / var(--tick) 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / 2px var(--tick) no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / var(--tick) 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / 2px var(--tick) no-repeat;
  padding: 1.75rem;
}
.bracket--tight { padding: 1rem 1.25rem; }
.bracket--muted {
  background-image:
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong)) ,
    linear-gradient(var(--border-strong), var(--border-strong));
}

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
}

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-family: var(--font-mono);
  font-size: var(--fs-200);
  padding: .7em 1.1em;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  line-height: 1;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent-strong); }
.btn--solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}
.btn--solid:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--on-accent); }
.btn--bracket::before { content: "["; margin-right: .1em; color: var(--muted); }
.btn--bracket::after { content: "]"; margin-left: .1em; color: var(--muted); }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }

/* ---------------------------------------------------------------------- */
/* Header / nav                                                            */
/* ---------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: .9rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  white-space: nowrap;
}
.brand__mark { width: 26px; height: 26px; flex: none; color: var(--accent); }

.nav__links {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-200);
}
.nav__links a {
  text-decoration: none;
  color: var(--ink-soft);
  padding-block: .3rem;
  border-bottom: 2px solid transparent;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav__actions { display: flex; align-items: center; gap: .5rem; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.15rem;
  height: 2.15rem;
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--ink-soft);
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn svg { width: 1.05rem; height: 1.05rem; }

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: .45em .7em;
  cursor: pointer;
}
.search-trigger:hover { border-color: var(--accent); color: var(--accent); }
.search-trigger kbd { background: transparent; border-color: var(--border-strong); }

.menu-toggle { display: none; }

@media (max-width: 860px) {
  .nav__links { display: none; }
  .menu-toggle { display: inline-flex; }
  .search-trigger .search-trigger__label { display: none; }
}

.mobile-panel {
  display: none;
  border-top: 1px solid var(--border);
  padding: 1rem 0 1.4rem;
}
.mobile-panel.is-open { display: block; }
.mobile-panel ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .9rem; font-family: var(--font-mono); }
.mobile-panel a { text-decoration: none; color: var(--ink-soft); font-size: var(--fs-300); }
.mobile-panel a[aria-current="page"] { color: var(--accent); }

/* ---------------------------------------------------------------------- */
/* Hero                                                                    */
/* ---------------------------------------------------------------------- */

.hero { padding-block: clamp(2.5rem, 6vw, 5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
}

.hero__tag {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: var(--fs-200);
  margin-bottom: .9rem;
}
.hero__tag strong { color: var(--accent); font-weight: 600; }

.hero h1 { margin-bottom: .3rem; }
.hero__tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-500);
  color: var(--ink-soft);
  font-weight: 400;
  margin-bottom: 1.1rem;
}
.hero p.lead { font-size: var(--fs-400); color: var(--ink-soft); max-width: 40rem; }

.diagram-frame { padding: 1.25rem; }
.diagram-frame svg text {
  font-family: var(--font-mono);
  fill: var(--ink-soft);
}
.diagram-frame svg .accent-line { stroke: var(--accent); }
.diagram-frame svg .accent2-line { stroke: var(--accent-2); }
.diagram-frame svg .box { fill: var(--bg-raised); stroke: var(--border-strong); }
.diagram-frame svg .dim { fill: var(--muted); font-size: 10px; }
.diagram-frame svg .node-title { fill: var(--ink); font-size: 12px; font-weight: 600; }

/* ---------------------------------------------------------------------- */
/* Numbered spec list (replaces generic feature cards)                    */
/* ---------------------------------------------------------------------- */

.spec-list { border-top: 1px solid var(--border); }
.spec-item {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1.5rem;
  padding-block: 1.75rem;
  border-bottom: 1px solid var(--border);
}
@media (max-width: 700px) {
  .spec-item { grid-template-columns: 3rem 1fr; }
}
.spec-item__index {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: var(--fs-500);
  line-height: 1;
}
.spec-item__title { margin-bottom: .4rem; font-size: var(--fs-500); }
.spec-item__body { color: var(--ink-soft); max-width: 42rem; }
.spec-item__body code { white-space: nowrap; }

/* ---------------------------------------------------------------------- */
/* Code blocks                                                            */
/* ---------------------------------------------------------------------- */

.code-block {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  overflow: hidden;
  margin: 1.25rem 0;
}
.code-block__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .9rem;
  border-bottom: 1px solid var(--code-border);
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--muted);
}
.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  color: var(--code-ink);
  font-size: var(--fs-200);
  line-height: 1.65;
}
.code-block code { background: none; border: 0; padding: 0; color: inherit; font-size: 1em; }
.copy-btn {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--muted);
  border: 1px solid var(--code-border);
  padding: .25em .6em;
  cursor: pointer;
}
.copy-btn:hover { color: var(--accent-strong); border-color: var(--accent-strong); }
.copy-btn[data-copied="true"] { color: var(--accent-2-strong); border-color: var(--accent-2-strong); }

/* token colors, minimal */
.tok-c { color: var(--muted); font-style: italic; }
.tok-k { color: var(--accent-2-strong); }
.tok-s { color: var(--accent-strong); }
.tok-n { color: var(--code-ink); }

/* ---------------------------------------------------------------------- */
/* Tables                                                                  */
/* ---------------------------------------------------------------------- */

.table-wrap { overflow-x: auto; margin: 1.5rem 0; border: 1px solid var(--border); }
table.ref-table { min-width: 640px; }
.ref-table th, .ref-table td {
  text-align: left;
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  font-size: var(--fs-200);
}
.ref-table th {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--muted);
  background: var(--bg-sunken);
  font-size: var(--fs-100);
}
.ref-table tr:last-child td { border-bottom: 0; }
.ref-table code { white-space: nowrap; }

/* ---------------------------------------------------------------------- */
/* Tabs                                                                    */
/* ---------------------------------------------------------------------- */

.tabs { margin: 1.5rem 0; }
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem;
  border-bottom: 1px solid var(--border);
}
.tabs__tab {
  font-family: var(--font-mono);
  font-size: var(--fs-200);
  padding: .6em 1em;
  border: 1px solid transparent;
  border-bottom: none;
  cursor: pointer;
  color: var(--muted);
  transform: translateY(1px);
}
.tabs__tab:hover { color: var(--ink); }
.tabs__tab[aria-selected="true"] {
  color: var(--accent);
  border-color: var(--border);
  border-bottom: 1px solid var(--bg);
  background: var(--bg-raised);
}
.tabs__panel { padding-top: 1.25rem; }
.tabs__panel[hidden] { display: none; }

/* ---------------------------------------------------------------------- */
/* Accordion                                                               */
/* ---------------------------------------------------------------------- */

.accordion__item { border-bottom: 1px solid var(--border); }
.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  padding: 1.1rem 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-300);
}
.accordion__icon {
  flex: none;
  width: 1rem; height: 1rem;
  position: relative;
}
.accordion__icon::before, .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--accent);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.accordion__icon::before { width: 100%; height: 2px; }
.accordion__icon::after { width: 2px; height: 100%; transition: transform .15s ease; }
.accordion__trigger[aria-expanded="true"] .accordion__icon::after { transform: translate(-50%, -50%) scaleY(0); }
.accordion__panel { overflow: hidden; }
.accordion__panel[hidden] { display: none; }
.accordion__panel-inner { padding-bottom: 1.2rem; color: var(--ink-soft); max-width: 48rem; }

/* ---------------------------------------------------------------------- */
/* Docs layout                                                             */
/* ---------------------------------------------------------------------- */

.docs-layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 3rem;
  align-items: start;
  padding-block: 2.5rem;
}
@media (max-width: 900px) {
  .docs-layout { grid-template-columns: 1fr; }
}

.doc-toc { position: sticky; top: 5.5rem; }
.doc-toc__title { font-family: var(--font-mono); font-size: var(--fs-100); color: var(--muted); margin-bottom: .8rem; }
.doc-toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.doc-toc a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: var(--fs-200);
  display: block;
  border-left: 2px solid transparent;
  padding-left: .8rem;
}
.doc-toc a:hover { color: var(--ink); }
.doc-toc a.is-active { color: var(--accent); border-left-color: var(--accent); }

.doc-toc-mobile { display: none; margin-bottom: 1.5rem; }
@media (max-width: 900px) {
  .doc-toc { display: none; }
  .doc-toc-mobile { display: block; }
}

.doc-section { scroll-margin-top: 5.5rem; margin-bottom: 3rem; }
.doc-section > .tag-mono { display: block; margin-bottom: .4rem; }

.prose { max-width: 62ch; }
.prose--wide { max-width: 76ch; }
.prose p, .prose li { color: var(--ink-soft); }
.prose ul, .prose ol { margin: 0 0 1em; }
.prose a { color: var(--accent); text-decoration-color: color-mix(in srgb, var(--accent) 50%, transparent); }
.prose blockquote {
  margin: 1.5em 0;
  padding-left: 1.2em;
  border-left: 3px solid var(--accent-2);
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-400);
}

.margin-note {
  font-size: var(--fs-200);
  color: var(--muted);
  border-left: 2px solid var(--accent-2);
  padding: .2rem 0 .2rem 1rem;
  margin: 1.5rem 0;
}
.margin-note strong { color: var(--accent-2-strong); font-family: var(--font-mono); font-weight: 600; font-size: var(--fs-100); display: block; margin-bottom: .3rem; }

/* ---------------------------------------------------------------------- */
/* Team                                                                    */
/* ---------------------------------------------------------------------- */

.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.5rem; }
.team-card { padding: 1.5rem; }
.team-card__avatar {
  width: 2.6rem; height: 2.6rem;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--accent);
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 1rem;
  font-size: var(--fs-300);
}
.team-card h3 { font-size: var(--fs-400); margin-bottom: .1rem; }
.team-card__role { font-family: var(--font-mono); font-size: var(--fs-100); color: var(--muted); display: block; margin-bottom: .8rem; }
.team-card p { color: var(--ink-soft); font-size: var(--fs-200); margin-bottom: 0; }

.principles { border-top: 1px solid var(--border); }

/* ---------------------------------------------------------------------- */
/* Search modal                                                            */
/* ---------------------------------------------------------------------- */

.search-modal {
  position: fixed; inset: 0;
  z-index: 100;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 1rem 1rem;
}
.search-modal.is-open { display: flex; }
.search-modal__backdrop {
  position: absolute; inset: 0;
  background: color-mix(in srgb, var(--bg-sunken) 80%, transparent);
}
.search-modal__dialog {
  position: relative;
  width: min(640px, 100%);
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  max-height: 70vh;
  display: flex;
  flex-direction: column;
}
.search-modal__promptline {
  display: flex; align-items: center; gap: .6rem;
  border-bottom: 1px solid var(--border);
  padding: .9rem 1rem;
  font-family: var(--font-mono);
}
.search-modal__promptline span { color: var(--accent-2-strong); }
.search-modal__input {
  flex: 1;
  background: none;
  border: 0;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-300);
}
.search-modal__input::placeholder { color: var(--muted); }
.search-modal__close { font-family: var(--font-mono); color: var(--muted); cursor: pointer; }
.search-modal__close:hover { color: var(--accent); }

.search-results { overflow-y: auto; padding: .5rem; }
.search-result {
  display: block;
  width: 100%;
  text-align: left;
  padding: .8rem .9rem;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--ink);
}
.search-result:hover, .search-result.is-active { background: var(--bg-sunken); border-color: var(--border); }
.search-result__page { font-family: var(--font-mono); font-size: var(--fs-100); color: var(--accent); margin-bottom: .2rem; }
.search-result__heading { font-weight: 600; margin-bottom: .2rem; }
.search-result__snippet { font-size: var(--fs-200); color: var(--muted); }
.search-result mark { background: color-mix(in srgb, var(--accent) 35%, transparent); color: inherit; }
.search-empty { padding: 1.5rem .9rem; color: var(--muted); font-family: var(--font-mono); font-size: var(--fs-200); }
.search-hint { padding: .6rem 1rem; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: var(--fs-100); color: var(--muted); display: flex; gap: 1.2rem; flex-wrap: wrap; }

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 3rem;
  margin-top: 4rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 760px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
.footer__brand { font-family: var(--font-serif); font-size: 1.15rem; margin-bottom: .6rem; }
.footer__col h4 { font-family: var(--font-mono); font-size: var(--fs-100); color: var(--muted); font-weight: 600; margin-bottom: .9rem; }
.footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.footer__col a { text-decoration: none; color: var(--ink-soft); font-size: var(--fs-200); }
.footer__col a:hover { color: var(--accent); }
.footer__note { color: var(--muted); font-size: var(--fs-200); max-width: 26rem; }
.footer__bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--muted);
}

/* Comparison table emphasis column */
.compare-table td.is-us, .compare-table th.is-us { background: color-mix(in srgb, var(--accent-2) 12%, transparent); }