/* attestium.com: one stylesheet, no framework. */

:root {
  --bg: #f6f5f0;
  --bg-2: #eeede6;
  --surface: #fbfaf7;
  --text: #13202e;
  --text-2: #465261;
  --text-3: #5d6874;
  --rule: #dcdad1;
  --rule-2: #c6c3b7;
  --accent: #1f6b56;
  --mint: #73bca6;
  --navy: #13202e;
  --tile-bg: #11263e;
  --tile-fg: #7fe3c0;
  --button-bg: #13202e;
  --button-fg: #f6f5f0;
  --tip-bg: #13202e;
  --tip-fg: #eef0ec;
  --t-c: #58626d;
  --t-s: #1f6b56;
  --t-k: #8c3f22;
  --t-n: #7a5410;
  --t-p: #245083;
  --pk: #dcefe7;
  --pk-line: #7dbfaa;
  --bn: #dfe7f0;
  --bn-line: #8aa5c4;
  --sy: #f1e7d0;
  --sy-line: #c9a865;
  --hw: #f3e0d8;
  --hw-line: #cc907d;
  --sg: #e5e5df;
  --sg-line: #9a9d96;
  --serif: 'Source Serif 4', georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', roboto, 'Helvetica Neue', arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, sfmono-regular, menlo, consolas, monospace;
  --header: 60px;
  --gutter: 24px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0f1a26;
    --bg-2: #132232;
    --surface: #13202e;
    --text: #e5e8e3;
    --text-2: #aab5c0;
    --text-3: #8d99a5;
    --rule: #223344;
    --rule-2: #31465b;
    --accent: #7fe3c0;
    --tile-bg: #11263e;
    --button-bg: #7fe3c0;
    --button-fg: #0f1a26;
    --tip-bg: #e5e8e3;
    --tip-fg: #13202e;
    --t-c: #7f8c99;
    --t-s: #7fe3c0;
    --t-k: #eeb592;
    --t-n: #e6ca80;
    --t-p: #9cc4ea;
    --pk: #173a33;
    --pk-line: #3f8f77;
    --bn: #1a2d45;
    --bn-line: #4f7098;
    --sy: #342d1d;
    --sy-line: #8f7743;
    --hw: #3a2621;
    --hw-line: #9c6352;
    --sg: #252c33;
    --sg-line: #66717b;

    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --bg: #0f1a26;
  --bg-2: #132232;
  --surface: #13202e;
  --text: #e5e8e3;
  --text-2: #aab5c0;
  --text-3: #8d99a5;
  --rule: #223344;
  --rule-2: #31465b;
  --accent: #7fe3c0;
  --tile-bg: #11263e;
  --button-bg: #7fe3c0;
  --button-fg: #0f1a26;
  --tip-bg: #e5e8e3;
  --tip-fg: #13202e;
  --t-c: #7f8c99;
  --t-s: #7fe3c0;
  --t-k: #eeb592;
  --t-n: #e6ca80;
  --t-p: #9cc4ea;
  --pk: #173a33;
  --pk-line: #3f8f77;
  --bn: #1a2d45;
  --bn-line: #4f7098;
  --sy: #342d1d;
  --sy-line: #8f7743;
  --hw: #3a2621;
  --hw-line: #9c6352;
  --sg: #252c33;
  --sg-line: #66717b;

  color-scheme: dark;
}

/* Base */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: color-mix(in srgb, currentcolor 40%, transparent);
}

a:hover {
  text-decoration-color: currentcolor;
}

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

::selection {
  background: color-mix(in srgb, var(--mint) 40%, transparent);
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.005em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
}

code,
pre,
kbd {
  font-family: var(--mono);
  font-size: 0.875em;
  font-variant-ligatures: none;
}

.tabular {
  font-variant-numeric: tabular-nums;
}

.muted {
  color: var(--text-3);
}

.wrap {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip {
  position: absolute;
  left: 8px;
  top: -60px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--rule-2);
}

.skip:focus {
  top: 8px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.header-row {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.mark {
  width: 28px;
  height: 28px;
  flex: none;
}

/* Brand SVGs placed inline (site/brand/*.svg) */

.at-tile {
  fill: var(--attestium-tile, #11263e);
  stroke: var(--attestium-line, #73bca6);
}

.at-glyph {
  fill: var(--attestium-glyph, #7fe3c0);
}

.at-glyph-line {
  fill: none;
  stroke: var(--attestium-glyph, #7fe3c0);
}

.at-word {
  fill: var(--attestium-word, var(--text));
}

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

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

.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9375rem;
  border-radius: 4px;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--bg-2);
}

.site-nav a[aria-current='page'] {
  color: var(--text);
  box-shadow: inset 0 -2px 0 var(--mint);
  border-radius: 0;
}

.site-nav svg {
  width: 16px;
  height: 16px;
}

.header-actions {
  display: flex;
  gap: 4px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 4px;
  background: none;
  color: var(--text-2);
  cursor: pointer;
}

.icon-button:hover {
  color: var(--text);
  border-color: var(--rule-2);
}

.icon-button svg {
  width: 20px;
  height: 20px;
}

.theme-toggle svg {
  display: none;
}

.theme-toggle[data-choice='system'] .i-system,
.theme-toggle[data-choice='light'] .i-light,
.theme-toggle[data-choice='dark'] .i-dark,
.theme-toggle:not([data-choice]) .i-system {
  display: block;
}

.menu-toggle {
  display: none;
}

@media (max-width: 760px) {
  :root {
    --gutter: 16px;
  }

  .header-row {
    gap: 8px;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
    padding: 8px var(--gutter) 16px;
  }

  .site-nav.open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
  }

  .site-nav a {
    display: flex;
    padding: 10px 8px;
    font-size: 1rem;
  }

  .site-nav a[aria-current='page'] {
    box-shadow: inset 2px 0 0 var(--mint);
  }

  .header-actions {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-grid;
  }
}

/* Buttons and copy */

.button {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--button-bg);
  border-radius: 4px;
  background: var(--button-bg);
  color: var(--button-fg);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
}

.button:hover {
  filter: brightness(1.15);
}

.button-quiet {
  background: transparent;
  color: var(--text);
  border-color: var(--rule-2);
}

.button-quiet:hover {
  filter: none;
  border-color: var(--text-3);
}

.copy {
  flex: none;
  padding: 2px 9px;
  border: 1px solid var(--rule-2);
  border-radius: 3px;
  background: var(--surface);
  color: var(--text-2);
  font: 500 0.75rem/1.6 var(--sans);
  cursor: pointer;
}

.copy:hover {
  color: var(--text);
  border-color: var(--text-3);
}

.copy.done {
  color: var(--accent);
  border-color: var(--accent);
}

/* Code */

.code {
  margin: 1.25rem 0;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--bg-2);
  overflow: hidden;
  min-width: 0;
}

.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 8px 5px 14px;
  border-bottom: 1px solid var(--rule);
  color: var(--text-3);
  font: 0.75rem/1.6 var(--mono);
}

.code pre {
  margin: 0;
  padding: 14px 16px 16px;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.65;
  tab-size: 2;
}

.code pre code {
  font-size: inherit;
}

.t-c {
  color: var(--t-c);
}

.t-s {
  color: var(--t-s);
}

.t-k {
  color: var(--t-k);
}

.t-n {
  color: var(--t-n);
}

.t-p {
  color: var(--t-p);
}

/* Tooltips */

.term {
  position: relative;
  text-decoration: underline dotted;
  text-decoration-color: var(--text-3);
  text-underline-offset: 0.2em;
  cursor: help;
}

.tip {
  position: fixed;
  z-index: 30;
  left: 0;
  top: 0;
  width: max-content;
  max-width: min(300px, calc(100vw - 32px));
  padding: 9px 12px;
  border-radius: 4px;
  background: var(--tip-bg);
  color: var(--tip-fg);
  font: 400 0.8125rem/1.5 var(--sans);
  letter-spacing: 0;
  text-align: left;
  text-transform: none;
  box-shadow: 0 6px 20px rgb(0 0 0 / 18%);
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s;
}

.tip strong {
  font-weight: 600;
}

.tip.open {
  visibility: visible;
  opacity: 1;
}

/* Without JS, fall back to CSS hover and focus. */
html:not(.js) .term:hover > .tip,
html:not(.js) .term:focus > .tip {
  position: absolute;
  top: calc(100% + 6px);
  visibility: visible;
  opacity: 1;
}

/* Landing: hero */

.hero {
  padding: 72px 0 80px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.1rem, 1.3rem + 3vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 17ch;
  margin-bottom: 24px;
}

.lede {
  font-size: 1.1875rem;
  line-height: 1.55;
  max-width: 36em;
  color: var(--text);
}

.lede-2 {
  color: var(--text-2);
  max-width: 36em;
}

.install {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  max-width: 100%;
  margin: 12px 0 24px;
  padding: 9px 10px 9px 16px;
  border: 1px solid var(--rule-2);
  border-radius: 6px;
  background: var(--surface);
}

.install code {
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.prompt {
  color: var(--text-3);
  user-select: none;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.hero-aside {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.element {
  width: 176px;
  line-height: 0;
}

.hero-mark {
  width: 100%;
  height: auto;
}





.datasheet {
  margin: 0;
  font-size: 0.875rem;
  border-top: 1px solid var(--rule-2);
}

.datasheet div {
  padding: 7px 0;
  border-bottom: 1px solid var(--rule);
}

.datasheet dt {
  color: var(--text-3);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.datasheet dd {
  margin: 0;
}

/* Landing: sections */

.section {
  padding: 72px 0;
  border-top: 1px solid var(--rule);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 16px 48px;
  align-items: baseline;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2rem);
}

.section-head p {
  color: var(--text-2);
  max-width: 44em;
  margin: 0;
}

.section-head p + p {
  margin-top: 12px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 48px;
  align-items: start;
}

.split .section-head {
  display: block;
  margin: 0;
}

.split .section-head h2 {
  margin-bottom: 16px;
}

.split .code {
  margin: 0;
}

/* Diagram */

.diagram {
  margin: 0;
}

.seq {
  display: block;
  width: 100%;
  max-width: 1000px;
  height: auto;
  margin: 0 auto;
  font-family: var(--sans);
}

.seq .lane rect {
  fill: var(--surface);
  stroke: var(--rule-2);
}

.seq .lane-name {
  fill: var(--text);
  font: 600 17px var(--serif);
}

.seq .sub {
  fill: var(--text-3);
  font-size: 12.5px;
}

.seq .life {
  stroke: var(--rule-2);
  stroke-dasharray: 3 5;
}

.seq .msg line {
  stroke: var(--text-2);
  stroke-width: 1.3;
}

.seq .msg .head {
  fill: var(--text-2);
}

.seq .msg text:not(.sub) {
  fill: var(--text);
  font: 500 14px var(--mono);
}

.seq .n {
  fill: var(--accent);
  font: 600 13px var(--mono);
}

.seq .note rect {
  fill: var(--bg-2);
  stroke: var(--rule-2);
}

.seq .note text {
  fill: var(--text-2);
  font-size: 13.5px;
}

.steps {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.diagram figcaption {
  max-width: 44em;
  margin: 28px auto 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  text-align: center;
}

@media (max-width: 860px) {
  .seq {
    display: none;
  }

  .steps {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip-path: none;
    white-space: normal;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
    border-left: 1px solid var(--rule-2);
  }

  .steps li {
    position: relative;
    padding: 0 0 18px 26px;
    counter-increment: step;
    color: var(--text-2);
  }

  .steps li::before {
    content: counter(step);
    position: absolute;
    left: -11px;
    top: 1px;
    width: 21px;
    height: 21px;
    border: 1px solid var(--rule-2);
    border-radius: 50%;
    background: var(--bg);
    color: var(--accent);
    font: 600 0.75rem/19px var(--mono);
    text-align: center;
  }

  .steps .who {
    display: block;
    color: var(--text-3);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .steps strong {
    color: var(--text);
    font: 500 0.875rem var(--mono);
    margin-right: 4px;
  }

  .diagram figcaption {
    text-align: left;
    margin-top: 8px;
  }
}

/* Table of elements */

.elements {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.elements li {
  position: relative;
  min-width: 0;
}

.tile {
  display: flex;
  flex-direction: column;
  aspect-ratio: 1 / 1.08;
  padding: 7px 9px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--fill);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.12s, box-shadow 0.12s;
}

.tile:hover,
.tile:focus-visible,
.tile.active {
  box-shadow: 0 0 0 1px var(--line), 0 6px 16px rgb(0 0 0 / 10%);
  transform: translateY(-1px);
}

.tile-n {
  font: 500 0.6875rem/1 var(--mono);
  color: var(--text-2);
}

.tile-sym {
  margin-top: auto;
  font: 600 clamp(1.5rem, 1rem + 1.3vw, 2.1rem) / 1 var(--serif);
  letter-spacing: -0.01em;
}

.tile-name {
  margin-top: 5px;
  font-size: 0.75rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-2);
}

.f-pk {
  --fill: var(--pk);
  --line: var(--pk-line);
}

.f-bn {
  --fill: var(--bn);
  --line: var(--bn-line);
}

.f-sy {
  --fill: var(--sy);
  --line: var(--sy-line);
}

.f-hw {
  --fill: var(--hw);
  --line: var(--hw-line);
}

.f-sg {
  --fill: var(--sg);
  --line: var(--sg-line);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  color: var(--text-2);
  font-size: 0.875rem;
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.swatch {
  width: 14px;
  height: 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--fill);
}

.more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}

@media (max-width: 1020px) {
  .elements {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .tile {
    aspect-ratio: auto;
    min-height: 92px;
  }
}

@media (max-width: 520px) {
  .elements {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 5px;
  }

  .tile {
    min-height: 78px;
    padding: 6px 7px;
  }

  .tile-name {
    font-size: 0.6875rem;
  }
}

/* Evidence levels */

.levels {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.level-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  margin-bottom: 16px;
}

.level-bar span {
  height: 4px;
  background: var(--rule);
}

.level-bar .on {
  background: var(--mint);
}

.level h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.level-n {
  font: 500 0.8125rem var(--mono);
  color: var(--text-3);
}

.level dl {
  margin: 0;
  font-size: 0.9375rem;
}

.level dt {
  color: var(--text-3);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.level dd {
  margin: 2px 0 14px;
  color: var(--text-2);
}

.level dd:last-child {
  margin-bottom: 0;
}

/* Compare and credit */

.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--rule-2);
}

.compare > div {
  padding: 24px 32px 8px 0;
}

.compare > div + div {
  padding-left: 32px;
  border-left: 1px solid var(--rule);
}

.compare h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.compare p {
  color: var(--text-2);
  max-width: 38em;
}

.credit {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  color: var(--text-2);
  font-size: 0.9375rem;
}

.credit p {
  margin: 0;
  max-width: 52em;
}

.credit-logo {
  flex: none;
  line-height: 0;
}

.credit-logo img {
  border-radius: 8px;
}

/* Landing: responsive */

@media (max-width: 1020px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
  }

  .hero-aside {
    max-width: 560px;
  }

  .levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px 32px;
  }

  .split {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 760px) {
  .hero {
    padding: 40px 0 48px;
  }

  .lede {
    font-size: 1.0625rem;
  }

  .hero-aside {
    grid-template-columns: 124px minmax(0, 1fr);
    gap: 20px;
  }

  .element {
    width: 124px;
  }

  .section {
    padding: 48px 0;
  }

  .section-head {
    grid-template-columns: minmax(0, 1fr);
    margin-bottom: 28px;
  }

  .levels {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .compare {
    grid-template-columns: minmax(0, 1fr);
  }

  .compare > div {
    padding-right: 0;
  }

  .compare > div + div {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .credit {
    align-items: flex-start;
  }
}

/* Footer */

.site-footer {
  margin-top: 0;
  padding: 48px 0 56px;
  border-top: 1px solid var(--rule);
  background: var(--bg-2);
  color: var(--text-2);
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.footer-brand p {
  margin: 12px 0 0;
  max-width: 26em;
}

.site-footer h2 {
  margin-bottom: 10px;
  color: var(--text-3);
  font: 500 0.75rem var(--sans);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li {
  margin: 5px 0;
}

.site-footer nav a {
  color: var(--text-2);
  text-decoration: none;
}

.site-footer nav a:hover {
  color: var(--text);
  text-decoration: underline;
}

@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* Docs layout */

.docs {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr) 200px;
  gap: 48px;
  align-items: start;
}

.sidebar,
.toc {
  position: sticky;
  top: var(--header);
  max-height: calc(100vh - var(--header));
  overflow-y: auto;
  padding: 32px 0 40px;
  overscroll-behavior: contain;
}

.side-toggle {
  display: none;
}

.side-group + .side-group {
  margin-top: 24px;
}

.side-group h2,
.toc h2 {
  margin: 0 0 8px;
  color: var(--text-3);
  font: 500 0.75rem var(--sans);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.side-group ul,
.toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.side-group a {
  display: block;
  padding: 4px 10px;
  border-left: 2px solid var(--rule);
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.45;
  text-decoration: none;
}

.side-group a:hover {
  color: var(--text);
  border-left-color: var(--rule-2);
}

.side-group a[aria-current='page'] {
  color: var(--text);
  font-weight: 600;
  border-left-color: var(--mint);
}

.toc a {
  display: block;
  padding: 3px 0 3px 12px;
  border-left: 1px solid var(--rule);
  color: var(--text-3);
  font-size: 0.8125rem;
  line-height: 1.4;
  text-decoration: none;
}

.toc .toc-3 a {
  padding-left: 24px;
}

.toc a:hover {
  color: var(--text);
}

.toc a.active {
  color: var(--text);
  border-left: 2px solid var(--mint);
  padding-left: 11px;
}

.toc .toc-3 a.active {
  padding-left: 23px;
}

.toc code {
  font-size: 0.95em;
}

.doc {
  min-width: 0;
  padding: 40px 0 72px;
}

@media (max-width: 1180px) {
  .docs {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 40px;
  }

  .toc {
    display: none;
  }
}

@media (max-width: 900px) {
  .docs {
    display: block;
  }

  .sidebar {
    position: sticky;
    top: var(--header);
    z-index: 10;
    max-height: none;
    overflow: visible;
    margin: 0 calc(-1 * var(--gutter));
    padding: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
  }

  .side-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    width: 100%;
    padding: 10px var(--gutter);
    border: 0;
    background: none;
    color: var(--text);
    font: 500 0.9375rem var(--sans);
    text-align: left;
    cursor: pointer;
  }

  .side-toggle > span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .side-toggle svg {
    flex: none;
    width: 20px;
    height: 20px;
    transition: transform 0.15s;
  }

  .side-toggle[aria-expanded='true'] svg {
    transform: rotate(180deg);
  }

  .side-nav {
    display: none;
    max-height: calc(100vh - var(--header) - 46px);
    overflow-y: auto;
    padding: 8px var(--gutter) 20px;
    border-top: 1px solid var(--rule);
  }

  .side-nav.open {
    display: block;
  }

  .doc {
    padding-top: 28px;
  }

  .prose h1 + p {
    font-size: 1.0625rem;
  }
}

/* Prose */

.prose {
  max-width: 46rem;
}

.prose h1 {
  font-size: clamp(2rem, 1.6rem + 1.5vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: 20px;
}

.prose h1 + p {
  font-size: 1.125rem;
  color: var(--text-2);
}

.prose h2 {
  font-size: 1.6rem;
  margin: 2.2em 0 0.7em;
  padding-top: 1em;
  border-top: 1px solid var(--rule);
}

.prose h3 {
  font-size: 1.2rem;
  margin: 2em 0 0.6em;
}

.prose h4 {
  font-size: 1rem;
  margin: 1.6em 0 0.5em;
}

.prose h2 code,
.prose h3 code {
  font-size: 0.8em;
  font-weight: 500;
}

.h-anchor {
  margin-left: 0.35em;
  color: var(--text-3);
  font-family: var(--sans);
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
}

:is(h2, h3, h4):hover .h-anchor,
.h-anchor:focus-visible {
  opacity: 1;
}

.prose ul,
.prose ol {
  padding-left: 1.4em;
  margin: 0 0 1em;
}

.prose li {
  margin: 0.3em 0;
}

.prose li > ul,
.prose li > ol {
  margin: 0.3em 0;
}

.prose :not(pre) > code {
  padding: 0.1em 0.3em;
  border-radius: 3px;
  background: var(--bg-2);
  border: 1px solid var(--rule);
  font-size: 0.84em;
}

.prose p code,
.prose li code {
  overflow-wrap: anywhere;
}

.prose blockquote {
  margin: 1.25em 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--mint);
  color: var(--text-2);
}

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

.prose img {
  height: auto;
}

.table-wrap {
  max-width: 100%;
  margin: 1.25em 0 1.5em;
  overflow-x: auto;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.5;
}

.prose th,
.prose td {
  padding: 8px 14px 8px 0;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.prose th {
  border-bottom-color: var(--rule-2);
  color: var(--text-3);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.prose th:last-child,
.prose td:last-child {
  padding-right: 0;
}

.prose table.no-head tr:first-child td {
  border-top: 1px solid var(--rule-2);
}

.prose td:first-child {
  min-width: 7em;
}

.edit {
  max-width: 46rem;
  margin: 48px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}

.pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  max-width: 46rem;
  margin-top: 24px;
}

.pager a {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.pager a:hover {
  border-color: var(--rule-2);
  background: var(--surface);
}

.pager span {
  display: block;
  color: var(--text-3);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pager .next {
  grid-column: 2;
  text-align: right;
}

/* 404 */

.not-found {
  padding-top: 96px;
  padding-bottom: 120px;
}

.not-found h1 {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-2);
}

.code-404 {
  font: 500 0.875rem var(--mono);
  color: var(--accent) !important;
}

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

@media print {
  .site-header,
  .sidebar,
  .toc,
  .pager,
  .edit,
  .site-footer,
  .copy {
    display: none !important;
  }

  .docs {
    display: block;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Guides and FAQ */

.guide {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 208px;
  gap: 56px;
  align-items: start;
  max-width: 1080px;
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  color: var(--text-3);
  font-size: 0.875rem;
}

.crumbs li + li::before {
  content: '/';
  margin: 0 8px;
  color: var(--rule-2);
}

.crumbs a {
  color: var(--text-2);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--text);
  text-decoration: underline;
}

.related {
  max-width: 46rem;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.related h2 {
  margin: 0 0 12px;
  color: var(--text-3);
  font: 500 0.75rem var(--sans);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.related ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.related a {
  font-weight: 600;
}

.related span {
  display: block;
  margin-top: 2px;
  color: var(--text-2);
  font-size: 0.875rem;
  line-height: 1.5;
}

@media (max-width: 1020px) {
  .guide {
    display: block;
  }
}

@media (max-width: 600px) {
  .related ul {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Brand page */

.brand-page {
  max-width: 1080px;
}

.brand-page .prose {
  max-width: 44rem;
}

.brand-section {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.brand-section h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.brand-section > p {
  max-width: 44rem;
  color: var(--text-2);
}

.brand-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  margin: 0;
  padding: 48px 32px 16px;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.panel-light {
  background: #f6f5f0;
  color: #465261;
}

.panel-dark {
  --attestium-word: #f1f0eb;

  background: #0f1a26;
  color: #aab5c0;
}

.panel-light .at-word {
  fill: #13202e;
}

.brand-logo {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin: 0 auto 36px;
}

.panel figcaption,
.brand-sizes figcaption,
.clearspace figcaption {
  font-size: 0.8125rem;
}

.brand-sizes {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 32px;
}

.brand-sizes figure {
  margin: 0;
  color: var(--text-3);
}

.brand-sizes svg {
  display: block;
  margin-bottom: 10px;
}

.size-256 {
  width: 128px;
  height: 128px;
}

.size-128 {
  width: 128px;
  height: 128px;
}

.size-64 {
  width: 64px;
  height: 64px;
}

.size-32 {
  width: 32px;
  height: 32px;
}

.size-16 {
  width: 16px;
  height: 16px;
}

.mono {
  color: var(--text);
}

.mono .at-tile,
.mono .at-glyph-line {
  fill: none;
  stroke: currentcolor;
}

.mono .at-glyph {
  fill: currentcolor;
}

.brand-split {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.clearspace {
  margin: 0;
  color: var(--text-3);
  max-width: 220px;
}

.clearspace svg {
  display: block;
  box-sizing: content-box;
  padding: 32px;
  margin-bottom: 10px;
  outline: 1px dashed var(--rule-2);
  outline-offset: -1px;
  background: repeating-linear-gradient(45deg, transparent 0 6px, color-mix(in srgb, var(--mint) 12%, transparent) 6px 7px);
}

.brand-rules,
.dos ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-2);
}

.brand-rules li,
.dos li {
  margin: 6px 0;
}

.swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.swatches li {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.875rem;
}

.swatches li > span:last-child {
  display: grid;
}

.swatch-lg {
  flex: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--rule-2);
  border-radius: 4px;
}

.type-specimens {
  margin: 0;
}

.type-specimens div {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.type-specimens dt {
  color: var(--text-3);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.type-specimens dd {
  margin: 4px 0 0;
  font-size: 1.5rem;
  line-height: 1.3;
}

.spec-serif {
  font-family: var(--serif);
  font-weight: 600;
}

.spec-sans {
  font-family: var(--sans);
}

.spec-mono {
  font-family: var(--mono);
  font-size: 1.25rem !important;
}

.dos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.dos h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.downloads {
  margin: 0;
  padding: 0;
  list-style: none;
}

.downloads li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}

.downloads a {
  min-width: 12em;
  font-weight: 600;
}

.not-found-mark {
  display: block;
  width: 96px;
  height: 96px;
  margin-bottom: 28px;
}

@media (max-width: 760px) {
  .brand-panels,
  .dos,
  .brand-split {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 1020px) and (min-width: 761px) {
  .footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}