:root {
  --paper: #f3efe6;
  --paper-deep: #e9e3d6;
  --ink: #1b1a17;
  --ink-soft: #4a463f;
  --muted: #7a7469;
  --rule: rgba(27, 26, 23, 0.85);
  --hair: rgba(27, 26, 23, 0.18);
  --accent: #c4432b;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --gutter: 32px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15140f;
    --paper-deep: #1e1c16;
    --ink: #ece6d8;
    --ink-soft: #c4bdae;
    --muted: #8d8678;
    --rule: rgba(236, 230, 216, 0.8);
    --hair: rgba(236, 230, 216, 0.16);
    --accent: #e0674c;
    color-scheme: dark;
  }
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.55;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

code,
pre,
var {
  font-family: var(--mono);
  font-style: normal;
}

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

.kicker,
.section-no,
.section-note,
.plate-no,
.masthead-meta,
.masthead-nav,
.field legend,
.field.range label,
.field.range output,
.ledger dt,
figcaption,
.fig-note,
.exports,
.button {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Masthead ------------------------------------------------------------ */

.masthead {
  padding-top: 18px;
}

.masthead-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
}

.wordmark {
  margin: 0;
  padding: 18px 0 14px;
  text-align: center;
  font-weight: 400;
  font-style: italic;
  font-size: clamp(56px, 11vw, 148px);
  line-height: 0.9;
  letter-spacing: -0.035em;
  border-bottom: 3px double var(--rule);
}

.wordmark a {
  text-decoration: none;
}

.wordmark a:hover {
  color: inherit;
}

.masthead-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 32px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.masthead-nav a {
  text-decoration: none;
}

/* Lede ------------------------------------------------------------- */

.lede {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
  padding-top: 56px;
  padding-bottom: 64px;
}

.lede .kicker {
  grid-column: 1 / -1;
  margin: 0 0 18px;
  color: var(--accent);
}

.headline {
  grid-column: 1 / span 8;
  margin: 0;
  font-weight: 350;
  font-size: clamp(40px, 5.6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.standfirst {
  grid-column: 9 / -1;
  align-self: end;
  font-size: 19px;
  color: var(--ink-soft);
}

.standfirst p {
  margin: 0 0 14px;
}

.byline {
  font-style: italic;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}

.lede-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin: 22px 0 0;
}

.lede-link {
  font-style: italic;
  color: var(--ink-soft);
}

/* A link styled as one of the square studio buttons. */
a.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  line-height: 1;
}

a.button:hover {
  color: var(--paper);
}

a.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.gh-button {
  padding: 13px 16px;
}

.gh-mark {
  flex: none;
}

.gh-button .arrow {
  margin-left: 2px;
  transition: transform 0.15s ease;
}

.gh-button:hover .arrow {
  transform: translate(2px, -2px);
}

/* Section heads ------------------------------------------------------ */

section {
  scroll-margin-top: 16px;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 14px 0 0;
  margin-bottom: 36px;
  border-top: 1px solid var(--rule);
}

.section-head h2 {
  margin: 0;
  font-weight: 400;
  font-size: 34px;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.section-no {
  color: var(--accent);
  min-width: 28px;
}

.section-note {
  margin-left: auto;
  color: var(--muted);
  text-align: right;
}

/* Studio ------------------------------------------------------------ */

.studio {
  padding-bottom: 96px;
}

.studio-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
  align-items: start;
}

.plate {
  grid-column: 1 / span 8;
  margin: 0;
  position: sticky;
  top: 24px;
}

.plate-frame {
  position: relative;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 14px;
}

.plate-frame canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 78vh;
  object-fit: contain;
  background: var(--paper-deep);
}

.drop-hint {
  position: absolute;
  inset: 14px;
  display: none;
  place-items: center;
  border: 1px dashed var(--accent);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.plate-frame.over .drop-hint {
  display: grid;
}

.plate figcaption,
.fig-note {
  display: flex;
  gap: 14px;
  margin-top: 12px;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.plate-no {
  color: var(--ink);
  white-space: nowrap;
}

.controls {
  grid-column: 9 / -1;
  border-top: 3px double var(--rule);
}

.source {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  align-items: end;
  padding: 18px 0;
  border-bottom: 1px solid var(--hair);
}

.source figure {
  margin: 0;
}

.source img {
  width: 96px;
  height: 120px;
  object-fit: cover;
  background: var(--paper-deep);
  border: 1px solid var(--hair);
}

.source figcaption {
  margin-top: 6px;
  color: var(--muted);
}

.source-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.link-button {
  appearance: none;
  border: 0;
  padding: 0;
  background: none;
  color: var(--ink);
  font: italic 18px/1.4 var(--serif);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  cursor: pointer;
}

.link-button:hover {
  color: var(--accent);
}

.link-button:disabled {
  color: var(--muted);
  cursor: default;
  text-decoration-color: var(--hair);
}

.link-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.link-button:focus-within,
.link-button:focus-visible,
.button:focus-visible,
.shape-list label:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.field {
  margin: 0;
  padding: 16px 0;
  border: 0;
  border-bottom: 1px solid var(--hair);
}

.field legend {
  float: left;
  width: 100%;
  padding: 0;
  margin-bottom: 8px;
  color: var(--muted);
}

.shape-list {
  clear: both;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 16px;
}

.shape-list label {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 3px 0;
  font-size: 17px;
  cursor: pointer;
  color: var(--ink-soft);
}

.shape-list input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.shape-list .n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

.shape-list label:hover {
  color: var(--ink);
}

.shape-list label:has(input:checked) {
  color: var(--ink);
  font-style: italic;
}

.shape-list label:has(input:checked) .n {
  color: var(--accent);
}

.shape-list label:has(input:checked)::after {
  content: "";
  flex: 1;
  align-self: center;
  border-bottom: 1px solid var(--accent);
  margin-left: 4px;
  min-width: 8px;
}

.field.range {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  row-gap: 8px;
}

.field.range label {
  color: var(--muted);
}

.field.range output {
  font-size: 13px;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  margin: 0;
  height: 20px;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--rule);
}

input[type="range"]::-moz-range-track {
  height: 1px;
  background: var(--rule);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px;
  height: 11px;
  margin-top: -5px;
  border-radius: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  transform: rotate(45deg);
}

input[type="range"]::-moz-range-thumb {
  width: 9px;
  height: 9px;
  border-radius: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
  transform: rotate(45deg);
}

input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.actions {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 10px;
  padding: 18px 0;
}

.button {
  appearance: none;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  padding: 12px 14px;
  cursor: pointer;
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}

.button:disabled {
  border-color: var(--hair);
  color: var(--muted);
  cursor: default;
}

.ledger {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  border-top: 1px solid var(--rule);
}

.ledger div {
  padding: 12px 0 10px;
  border-bottom: 1px solid var(--hair);
}

.ledger div:nth-child(odd) {
  padding-right: 12px;
  border-right: 1px solid var(--hair);
}

.ledger div:nth-child(even) {
  padding-left: 14px;
}

.ledger dt {
  color: var(--muted);
}

.ledger dd {
  margin: 2px 0 0;
  font-size: 30px;
  line-height: 1.1;
  font-weight: 350;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.01em;
}

.exports {
  margin: 14px 0 0;
  color: var(--muted);
}

.exports .link-button {
  font-size: 17px;
  margin: 0 2px;
}

/* Method ------------------------------------------------------------ */

.method {
  padding-bottom: 96px;
}

.essay {
  column-count: 2;
  column-gap: 56px;
  column-rule: 1px solid var(--hair);
  max-width: 1060px;
  hyphens: auto;
  text-wrap: pretty;
}

.essay p {
  margin: 0 0 1em;
}

.dropcap::first-letter {
  float: left;
  font-size: 5.1em;
  line-height: 0.82;
  padding: 0.06em 0.09em 0 0;
  font-weight: 400;
  color: var(--accent);
}

.pull {
  break-inside: avoid;
  margin: 0.6em 0 1.2em;
  padding: 18px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 27px;
  line-height: 1.25;
  font-style: italic;
  font-weight: 350;
  letter-spacing: -0.01em;
  hyphens: manual;
}

.progression {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 52px;
}

.progression figure,
.specimens figure {
  margin: 0;
}

.progression img,
.specimens img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--paper-deep);
}

.progression figcaption {
  margin-top: 8px;
  color: var(--muted);
}

.progression figcaption b {
  font-weight: 500;
  color: var(--ink);
}

.fig-note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  max-width: 760px;
}

/* Catalogue ------------------------------------------------------------ */

.catalogue {
  padding-bottom: 96px;
}

.specimens {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px 18px;
}

.specimens figcaption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--hair);
  font-family: var(--serif);
  font-size: 17px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
}

.specimens .n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.specimens code {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

/* Reference ------------------------------------------------------------ */

.reference {
  padding-bottom: 80px;
}

.ref-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
}

.ref-intro {
  grid-column: 1 / span 5;
  min-width: 0;
}

.ref-intro h3 {
  margin: 0 0 6px;
  font-weight: 400;
  font-style: italic;
  font-size: 23px;
}

.ref-intro p {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

pre {
  margin: 0 0 32px;
  padding: 14px 16px;
  overflow-x: auto;
  background: var(--paper-deep);
  border-left: 2px solid var(--accent);
  font-size: 13px;
  line-height: 1.6;
}

.flags {
  grid-column: 7 / -1;
  margin: 0;
  border-top: 1px solid var(--rule);
}

.flags div {
  display: grid;
  grid-template-columns: 9.5em 1fr;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hair);
}

.flags dt {
  font-family: var(--mono);
  font-size: 14px;
  padding-top: 3px;
}

.flags dt var,
.flags dd var {
  color: var(--muted);
}

.flags dd {
  margin: 0;
  font-size: 17px;
  color: var(--ink-soft);
}

.flags code {
  font-size: 14px;
}

/* Colophon ------------------------------------------------------------ */

.colophon {
  padding-top: 18px;
  padding-bottom: 56px;
}

.colophon p {
  margin: 0;
  padding-top: 18px;
  border-top: 3px double var(--rule);
  max-width: 900px;
  font-size: 16px;
  color: var(--ink-soft);
}

.colophon .kicker {
  color: var(--accent);
  margin-right: 8px;
}

.colophon .colophon-links {
  border-top: 0;
  padding-top: 18px;
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 1020px) {
  .headline {
    grid-column: 1 / -1;
  }

  .standfirst {
    grid-column: 1 / span 9;
    margin-top: 28px;
  }

  .plate,
  .controls {
    grid-column: 1 / -1;
  }

  .plate {
    position: static;
    margin-bottom: 28px;
  }

  .controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: var(--gutter);
  }

  .controls > .source,
  .controls > fieldset {
    grid-column: 1 / -1;
  }

  .shape-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .ledger,
  .exports {
    grid-column: 1 / -1;
  }

  .ledger {
    grid-template-columns: repeat(4, 1fr);
  }

  .ledger div:nth-child(n) {
    padding: 12px 12px 10px;
    border-right: 1px solid var(--hair);
  }

  .ledger div:first-child {
    padding-left: 0;
  }

  .ledger div:last-child {
    border-right: 0;
  }

  .ref-intro,
  .flags {
    grid-column: 1 / -1;
  }

  .specimens {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 680px) {
  :root {
    --gutter: 16px;
  }

  body {
    font-size: 18px;
  }

  .hide-sm {
    display: none;
  }

  .masthead-nav {
    gap: 6px 18px;
  }

  .lede {
    padding-top: 36px;
    padding-bottom: 44px;
  }

  .standfirst {
    grid-column: 1 / -1;
  }

  .section-head {
    flex-wrap: wrap;
    gap: 4px 12px;
  }

  .section-head h2 {
    font-size: 28px;
  }

  .section-note {
    flex-basis: 100%;
    margin-left: 40px;
    text-align: left;
  }

  .plate-frame {
    padding: 8px;
  }

  .drop-hint {
    inset: 8px;
  }

  .controls {
    display: block;
  }

  .shape-list {
    grid-template-columns: 1fr 1fr;
  }

  .ledger {
    grid-template-columns: 1fr 1fr;
  }

  .ledger div:nth-child(n) {
    padding: 12px 0 10px;
    border-right: 0;
  }

  .ledger div:nth-child(odd) {
    padding-right: 12px;
    border-right: 1px solid var(--hair);
  }

  .ledger div:nth-child(even) {
    padding-left: 14px;
  }

  .ledger dd {
    font-size: 26px;
  }

  .essay {
    column-count: 1;
  }

  .pull {
    font-size: 23px;
  }

  .progression,
  .specimens {
    grid-template-columns: 1fr 1fr;
    gap: 28px 12px;
  }

  .specimens figcaption {
    flex-wrap: wrap;
    gap: 2px 8px;
    font-size: 16px;
  }

  .specimens code {
    margin-left: 0;
    flex-basis: 100%;
  }

  .flags div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}