@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/InterVariable.woff2") format("woff2");
}

:root {
  color-scheme: dark;

  --ground: #090909;
  --surface: #111111;
  --surface-raised: #181818;
  --surface-active: #262626;
  --surface-deep: #0b0b0b;
  --surface-nav: #151515;
  --surface-inspector: #181818;
  --text: #f1f1f1;
  --text-soft: #b8b8b8;
  --text-dim: #8c8c8c;
  --line: #353535;
  --line-strong: #666666;
  --focus: #d7d7d7;
  --shadow: #0009;

  --space-1: 0.375rem;
  --space-2: 0.625rem;
  --space-3: 0.875rem;
  --space-4: 1.25rem;
  --space-5: 1.75rem;
  --space-6: 2.5rem;
  --space-7: 4rem;
  --space-8: 6rem;

  --radius-small: 0.375rem;
  --radius: 0.75rem;
  --radius-large: 1.25rem;
  --page-width: 76rem;
  --reading-width: 43rem;
  --rule: 1px solid var(--line);
  --rule-strong: 1px solid var(--line-strong);
  --rule-bright: 1px solid var(--text);
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --motion-fast: 160ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 20rem;

  font-family: var(--font-sans);
  line-height: 1.5;

  background: var(--ground);
  color: var(--text);
}

a {
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.25em;

  color: inherit;
}

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

a:focus-visible {
  outline: 1px solid var(--focus);
  outline-offset: 0.25rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;

  width: min(calc(100% - 2rem), var(--page-width));
  min-height: 4.5rem;
  gap: var(--space-4);
  margin-inline: auto;

  border-bottom: var(--rule);
}

.wordmark {
  display: inline-flex;
  align-items: center;

  gap: var(--space-2);

  text-decoration: none;
}

.wordmark > span {
  display: grid;
  place-items: center;

  width: 2rem;
  height: 2rem;
  border-radius: 50%;

  border: var(--rule-strong);
  color: var(--text);
}

.site-header nav {
  display: flex;

  gap: var(--space-4);

  font-size: 0.875rem;

  color: var(--text-soft);
}

main {
  width: min(calc(100% - 2rem), var(--page-width));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(24rem, 1.12fr);
  align-items: center;

  min-height: calc(100dvh - 4.5rem);
  gap: clamp(var(--space-6), 6vw, var(--space-8));
  padding-block: var(--space-7);
}

.hero-copy {
  max-width: var(--reading-width);
}

.eyebrow {
  margin: 0 0 var(--space-3);

  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;

  color: var(--text-dim);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: var(--space-4);

  font-size: clamp(2.75rem, 6vw, 5.75rem);
  font-weight: 650;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.hero-lede {
  max-width: 37rem;
  margin-bottom: var(--space-5);

  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.55;

  color: var(--text-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;

  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 2.9rem;
  padding-inline: var(--space-4);
  border-radius: var(--radius-small);

  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.primary-action {
  border: var(--rule-bright);

  background: var(--text);
  color: var(--ground);
}

.secondary-action {
  border: var(--rule-strong);

  background: transparent;
  color: var(--text);
}

.fixture-note {
  max-width: 35rem;
  margin: 0;

  font-size: 0.8rem;
  line-height: 1.55;

  color: var(--text-dim);
}

.fixture-note strong {
  color: var(--text-soft);
}

.instrument-preview {
  display: grid;

  min-width: 0;
  padding: var(--space-2);
  border-radius: var(--radius-large);

  text-decoration: none;

  border: var(--rule-strong);
  background: var(--surface);
  box-shadow: 0 2rem 6rem var(--shadow);
  color: var(--text-soft);

  transform: rotate(1.25deg);
  transition: border-color var(--motion-fast), transform var(--motion-fast);
}

.instrument-preview:hover {
  border-color: var(--text-soft);

  transform: rotate(0deg) translateY(-0.2rem);
}

.preview-mantle {
  display: grid;
  grid-template-columns: 24% minmax(0, 1fr) 25%;

  aspect-ratio: 16 / 10;
  min-height: 20rem;
  border-radius: var(--radius);

  border: var(--rule);
  background: var(--surface-deep);

  overflow: hidden;
}

.preview-sidebar,
.preview-center,
.preview-inspector {
  min-width: 0;
  padding: var(--space-3);
}

.preview-sidebar {
  display: grid;
  align-content: start;

  gap: var(--space-3);

  border-right: var(--rule);
  background: var(--surface-nav);
}

.preview-mark {
  display: grid;
  place-items: center;

  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: var(--space-4);
  border-radius: 50%;

  border: var(--rule-strong);
}

.preview-row,
.preview-header,
.preview-message,
.preview-composer,
.preview-inspector span {
  display: block;

  border: var(--rule);
  border-radius: var(--radius-small);

  background: var(--surface-raised);
}

.preview-row {
  height: 2.8rem;
}

.preview-row.is-selected {
  border-color: var(--line-strong);

  background: var(--surface-active);
}

.preview-center {
  display: grid;
  grid-template-rows: auto 1fr auto auto auto 1fr auto;

  gap: var(--space-3);
}

.preview-header {
  grid-row: 1;

  height: 3rem;
}

.preview-message {
  grid-row: 3;

  width: 74%;
  height: 3.6rem;
}

.preview-message.is-own {
  justify-self: end;
  grid-row: 2;
  align-self: end;

  background: var(--surface-active);
}

.preview-message.is-short {
  grid-row: 4;

  width: 48%;
  height: 2.8rem;
}

.preview-composer {
  grid-row: 7;
  align-self: end;

  height: 3.4rem;
}

.preview-inspector {
  display: grid;
  align-content: start;

  gap: var(--space-3);

  border-left: var(--rule);
  background: var(--surface-inspector);
}

.preview-inspector span {
  height: 4.25rem;
}

.preview-caption {
  display: flex;
  justify-content: space-between;

  gap: var(--space-3);
  padding: var(--space-3) var(--space-2) var(--space-1);

  font-size: 0.75rem;
}

.preview-caption b {
  color: var(--text);
}

.principles {
  padding-block: var(--space-8);

  border-top: var(--rule);
}

.section-heading {
  max-width: 48rem;
  margin-bottom: var(--space-6);
}

.section-heading h2,
.authority h2 {
  margin-bottom: 0;

  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.03;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));

  border-top: var(--rule);
  border-bottom: var(--rule);
}

.principle-grid article {
  min-width: 0;
  min-height: 18rem;
  padding: var(--space-5);

  border-right: var(--rule);
}

.principle-grid article:last-child {
  border-right: 0;
}

.principle-index {
  display: inline-block;

  margin-bottom: var(--space-7);

  font-size: 0.75rem;

  color: var(--text-dim);
}

.principle-grid h3 {
  margin-bottom: var(--space-3);

  font-size: 1.4rem;
}

.principle-grid p {
  max-width: 24rem;
  margin-bottom: 0;

  color: var(--text-soft);
}

.authority {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(28rem, 1.2fr);
  align-items: start;

  gap: var(--space-7);
  padding-block: var(--space-8);

  border-bottom: var(--rule);
}

.authority ol {
  display: grid;

  margin: 0;
  padding: 0;

  list-style: none;

  border-top: var(--rule);
}

.authority li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  align-items: center;

  gap: var(--space-3);
  min-height: 4.75rem;

  border-bottom: var(--rule);
}

.authority li > span,
.authority li > small {
  font-size: 0.75rem;

  color: var(--text-dim);
}

.authority li > small {
  text-align: right;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;

  width: min(calc(100% - 2rem), var(--page-width));
  min-height: 7rem;
  gap: var(--space-4);
  margin-inline: auto;

  font-size: 0.8rem;

  color: var(--text-dim);
}

footer strong {
  color: var(--text);
}

.noscript-note {
  max-width: 35rem;
  margin: calc(-1 * var(--space-3)) 0 var(--space-4);

  font-size: 0.85rem;

  color: var(--text-soft);
}

.documentation-shell {
  padding-block: clamp(var(--space-6), 7vw, var(--space-8));
}

.documentation-content {
  width: min(100%, 54rem);
  margin-inline: auto;

  overflow-wrap: break-word;
}

.documentation-content h1 {
  margin-bottom: var(--space-6);

  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 650;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.documentation-content h2 {
  margin: var(--space-7) 0 var(--space-3);
  padding-top: var(--space-4);
  border-top: var(--rule);

  font-size: clamp(1.55rem, 4vw, 2.4rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.documentation-content h3 {
  margin: var(--space-5) 0 var(--space-2);

  font-size: 1.15rem;
  line-height: 1.25;
}

.documentation-content p,
.documentation-content li {
  line-height: 1.7;

  color: var(--text-soft);
}

.documentation-content li + li {
  margin-top: var(--space-1);
}

.documentation-content strong,
.documentation-content th {
  color: var(--text);
}

.documentation-content :not(pre) > code {
  padding: 0.12em 0.35em;
  border: var(--rule);
  border-radius: var(--radius-small);

  font-size: 0.88em;

  background: var(--surface);
  color: var(--text);
}

.documentation-content pre {
  margin-block: var(--space-4);
  padding: var(--space-4);
  border: var(--rule);
  border-radius: var(--radius);

  font-size: 0.82rem;
  line-height: 1.6;

  background: var(--surface-deep);
  color: var(--text-soft);

  overflow-x: auto;
}

.documentation-content table {
  display: block;

  width: 100%;
  margin-block: var(--space-5);
  border-collapse: collapse;

  overflow-x: auto;
}

.documentation-content th,
.documentation-content td {
  min-width: 8rem;
  padding: var(--space-2) var(--space-3);
  border: var(--rule);

  text-align: left;
  vertical-align: top;
}

.documentation-content blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-left: var(--rule-strong);
}

.documentation-content blockquote > :last-child {
  margin-bottom: 0;
}

.documentation-content hr {
  margin-block: var(--space-7);
  border: 0;
  border-top: var(--rule);
}

.doc-diagram {
  margin: var(--space-6) 0;
  padding: var(--space-4);
  border: var(--rule);
  border-radius: var(--radius);

  background: var(--surface);
}

.doc-diagram img {
  display: block;

  width: 100%;
  max-height: 42rem;

  object-fit: contain;
}

.doc-diagram figcaption {
  margin-top: var(--space-3);

  line-height: 1.6;

  color: var(--text-soft);
}

.doc-diagram details {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--rule);

  color: var(--text-dim);
}

.doc-diagram summary {
  cursor: pointer;
}

@media (max-width: 58rem) {
  .hero,
  .authority {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    min-height: auto;
  }

  .instrument-preview {
    width: min(100%, 46rem);
  }
}

@media (max-width: 42rem) {
  .site-header nav a:first-child {
    display: none;
  }

  .hero {
    padding-block: var(--space-6);
  }

  h1 {
    font-size: clamp(2.65rem, 15vw, 4.5rem);
  }

  .instrument-preview {
    transform: none;
  }

  .instrument-preview:hover {
    transform: translateY(-0.2rem);
  }

  .preview-mantle {
    grid-template-columns: 28% minmax(0, 1fr);

    min-height: 0;
  }

  .preview-inspector {
    display: none;
  }

  .preview-caption {
    display: grid;
  }

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

  .principle-grid article {
    min-height: auto;

    border-right: 0;
    border-bottom: var(--rule);
  }

  .principle-grid article:last-child {
    border-bottom: 0;
  }

  .principle-index {
    margin-bottom: var(--space-5);
  }

  .authority {
    gap: var(--space-6);
  }

  .authority li {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .authority li > small {
    grid-column: 2;

    text-align: left;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .instrument-preview {
    transition: none;
  }
}

@media (forced-colors: active) {
  a:focus-visible,
  .instrument-preview:focus-visible {
    outline: 1px solid Highlight;
  }
}