/*
 * Birbly website styles.
 * Warm natural-history atlas: paper, ink and rust, Georgia for names and
 * prose, the system sans for labels and controls. No external fonts or assets.
 */

:root {
  color-scheme: light dark;

  --paper: #f4efdf;
  --ink: #28372f;
  --muted: #62695d;
  --line: #d3d2bf;
  --surface: #e7e2cf;
  --accent: #a3452e;
  --on-accent: #fff6e9;
  --map-mark: #5b7950;
  --good-bg: #dfe8d6;
  --good-line: #2f6b4a;
  --bad-bg: #f3dad1;
  --bad-line: #a3452e;

  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --gutter: clamp(1.25rem, 5vw, 3.5rem);
  --measure: 38rem;
  --section-space: clamp(3.5rem, 8vw, 6.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #202c29;
    --ink: #f1ebd8;
    --muted: #bec3b5;
    --line: #49554c;
    --surface: #37463f;
    --accent: #efab87;
    --on-accent: #292d25;
    --map-mark: #abc19c;
    --good-bg: #2d4638;
    --good-line: #9cc7a8;
    --bad-bg: #4b312a;
    --bad-line: #efab87;
  }
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

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

.wrap {
  max-width: 76rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

[hidden] {
  display: none !important;
}

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

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: 0;
  z-index: 10;
  transform: translateY(-120%);
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.9375rem;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0.5rem);
}

.label {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.label-accent {
  color: var(--accent);
}

.scientific {
  font-style: italic;
  color: var(--muted);
}

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

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  min-height: 2.75rem;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.875rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -1.5px;
  text-decoration: none;
}

.brand-bird {
  display: none;
  width: 40px;
  height: 32px;
  transform: translateY(4px);
}

@supports ((mask-image: url("")) or (-webkit-mask-image: url(""))) {
  .brand-bird {
    display: block;
    background: currentColor;
    -webkit-mask: url("../img/brand-bird.svg") center / contain no-repeat;
    mask: url("../img/brand-bird.svg") center / contain no-repeat;
  }
}

.site-nav,
.lang-nav {
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.site-nav ul,
.lang-nav ul {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav {
  order: 3;
  flex-basis: 100%;
  border-top: 1px solid var(--line);
}

.site-nav ul {
  gap: 1.75rem;
}

.site-nav a,
.lang-nav a,
.lang-nav span {
  display: inline-block;
  padding-block: 0.75rem;
  color: var(--ink);
  text-decoration: none;
}

.site-nav a {
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.site-nav a:hover,
.lang-nav a:hover {
  color: var(--accent);
}

.site-nav a[aria-current="page"] {
  border-bottom-color: var(--accent);
}

.lang-nav {
  order: 2;
}

.lang-nav ul {
  gap: 1rem;
}

.lang-nav span[aria-current] {
  color: var(--muted);
}

.lang-nav a {
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 0.3em;
}

@media (min-width: 46rem) {
  .site-header .wrap {
    padding-block: 1.5rem;
  }

  .site-nav {
    order: 2;
    flex-basis: auto;
    margin-left: auto;
    border-top: 0;
  }

  .site-nav a {
    margin-bottom: 0;
  }

  .lang-nav {
    order: 3;
    padding-left: 1.5rem;
    border-left: 1px solid var(--line);
  }
}

.lang-hint {
  margin: 0;
  padding: 0.625rem var(--gutter);
  background: var(--surface);
  font-family: var(--sans);
  font-size: 0.9375rem;
  text-align: center;
}

.lang-hint[hidden] {
  display: none;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 3.25rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--accent);
  border-radius: 0.5rem 0.5rem 1.375rem 0.5rem;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.25;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  filter: brightness(1.08);
}

.button-quiet {
  background: transparent;
  color: var(--accent);
}

.text-link {
  font-family: var(--sans);
  font-size: 1rem;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding-block: clamp(1.5rem, 4vw, 3.5rem) var(--section-space);
}

.hero h1 {
  font-size: clamp(2.75rem, 1.4rem + 6vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.hero-figure {
  margin: 0.5rem 0 0;
}

.hero-figure img {
  width: 100%;
}

.hero-figure figcaption,
.figure-caption {
  margin-top: 0.75rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
}

.hero-figure figcaption {
  text-align: right;
}

.hero-figure figcaption i {
  font-family: var(--serif);
  font-size: 0.9375rem;
}

.hero-lede {
  max-width: var(--measure);
  font-size: clamp(1.1875rem, 1rem + 0.6vw, 1.375rem);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.75rem;
  margin-top: 0.5rem;
}

.status {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.25rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  max-width: var(--measure);
  font-family: var(--sans);
  font-size: 0.9375rem;
  line-height: 1.45;
}

.status img {
  flex: none;
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 22.5%;
  box-shadow: 0 0 0 1px var(--line);
}

.status p {
  margin: 0;
}

.status strong {
  display: block;
  font-weight: 600;
}

.status span {
  color: var(--muted);
}

@media (min-width: 56rem) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    grid-template-rows: repeat(5, auto) 1fr;
    column-gap: clamp(2rem, 4vw, 4.5rem);
  }

  .hero > * {
    grid-column: 1;
  }

  .hero-figure {
    grid-column: 2;
    grid-row: 1 / -1;
    align-self: center;
    margin: 0 calc(var(--gutter) * -0.4) 0 0;
  }
}

/* ---------- Plates (home page sections) ---------- */

.plate {
  border-top: 1px solid var(--line);
  padding-block: var(--section-space);
}

.plate-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem 3rem;
}

.plate-mark {
  margin: 0;
}

.plate-mark .label {
  display: block;
}

.plate-mark .plate-sub {
  display: block;
  margin-top: 0.125rem;
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--muted);
}

.plate-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem 3rem;
}

.plate-head h2,
.brief h2,
.closing h2 {
  font-size: clamp(2rem, 1.2rem + 3.2vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.plate-head p {
  max-width: var(--measure);
}

.plate-wide {
  grid-column: 1 / -1;
}

@media (min-width: 56rem) {
  .plate-grid {
    grid-template-columns: 9rem minmax(0, 1fr);
  }

  .plate-mark {
    padding-top: 0.75rem;
  }

  .plate-head {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- Specimen card (Plate I) ---------- */

.specimen {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem clamp(2rem, 5vw, 5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--ink);
}

.specimen-number {
  margin: 0 0 0.75rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.specimen-name {
  font-size: clamp(2.25rem, 1.6rem + 2.6vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.specimen-id .scientific {
  margin: 0.375rem 0 0;
  font-size: 1.25rem;
}

.specimen-form {
  margin: 0.75rem 0 0;
}

.pose {
  min-width: 0;
  margin: 1.5rem 0 0;
  padding: 0;
  border: 0;
}

.pose-stage {
  position: relative;
  aspect-ratio: 5 / 4;
}

.pose-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: opacity 0.25s ease, visibility 0.25s;
}

.pose-input-rest:checked ~ .pose-stage .pose-image-flight,
.pose-input-flight:checked ~ .pose-stage .pose-image-rest {
  opacity: 0;
  visibility: hidden;
}

.pose-tabs {
  display: flex;
  justify-content: center;
  width: fit-content;
  margin: 1rem auto 0;
  padding: 0.25rem;
  border-radius: 2rem;
  background: var(--surface);
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.pose-tabs label {
  min-height: 2.5rem;
  padding: 0.5rem 1.125rem;
  border-radius: 2rem;
  line-height: 1.5rem;
  cursor: pointer;
}

.pose-input-rest:checked ~ .pose-tabs .pose-tab-rest,
.pose-input-flight:checked ~ .pose-tabs .pose-tab-flight {
  background: var(--accent);
  color: var(--on-accent);
}

.pose-input-rest:focus-visible ~ .pose-tabs .pose-tab-rest,
.pose-input-flight:focus-visible ~ .pose-tabs .pose-tab-flight {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.pose-note {
  max-width: 30rem;
  margin: 1.25rem auto 0;
  font-size: 1rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--muted);
  text-align: center;
}

.datum {
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
}

.datum:first-child {
  padding-top: 0;
  border-top: 0;
}

.datum > h4 {
  margin-bottom: 1rem;
}

.measures,
.ranks {
  margin: 0;
}

.measures dt,
.ranks dt {
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--muted);
}

.measures dd,
.ranks dd {
  margin: 0;
}

.measure + .measure {
  margin-top: 1.25rem;
}

.measure-value {
  display: block;
  font-size: 1.625rem;
  line-height: 1.25;
}

/* Values of the specimen shown on the home page, in centimetres. The site
   generator refuses to render if they differ from the content package. */
.measure-length {
  --min: 12.5;
  --max: 14;
}

.measure-wingspan {
  --min: 20;
  --max: 22;
}

/* A 0–25 cm scale: 4% of the width is one centimetre. */
.scale {
  position: relative;
  display: block;
  height: 0.875rem;
  margin-top: 0.5rem;
  border-right: 1px solid var(--muted);
  background:
    linear-gradient(to right, var(--muted) 0 1px, transparent 1px) 0 100% / 20% 100% repeat-x,
    linear-gradient(to right, var(--line) 0 1px, transparent 1px) 0 100% / 4% 50% repeat-x;
}

.scale-extent,
.scale-range {
  position: absolute;
  bottom: 0;
  left: 0;
}

.scale-extent {
  width: calc(var(--max) * 4%);
  height: 2px;
  background: var(--ink);
}

.scale-range {
  left: calc(var(--min) * 4%);
  width: calc((var(--max) - var(--min)) * 4%);
  height: 0.5rem;
  background: var(--accent);
}

.scale-axis {
  position: relative;
  display: block;
  height: 1.25rem;
  margin-top: 0.25rem;
  font-family: var(--sans);
  font-size: 0.6875rem;
  color: var(--muted);
}

.scale-axis span {
  position: absolute;
  left: calc(var(--at) * 4%);
  transform: translateX(-50%);
}

.scale-axis span:nth-child(1) { --at: 0; }
.scale-axis span:nth-child(2) { --at: 5; }
.scale-axis span:nth-child(3) { --at: 10; }
.scale-axis span:nth-child(4) { --at: 15; }
.scale-axis span:nth-child(5) { --at: 20; }
.scale-axis span:nth-child(6) { --at: 25; }

.scale-axis span:first-child {
  transform: none;
}

.scale-axis span:last-child {
  transform: translateX(-100%);
  white-space: nowrap;
}

.ranks {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5rem 1.5rem;
  align-items: baseline;
}

.ranks div {
  display: contents;
}

.range-map {
  margin: 0;
}

.range-map img {
  width: 100%;
}

.range-map figcaption {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--muted);
}

.swatch {
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 2px;
  background: var(--map-mark);
}

.range-text {
  margin-top: 1rem;
  font-size: 1.0625rem;
}

.example-note {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--muted);
}

@media (min-width: 56rem) {
  .specimen {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .specimen-data {
    padding-top: 0.25rem;
  }
}

/* ---------- Deck plate (Plate II) ---------- */

.deck {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(1rem, 3vw, 2.25rem);
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  list-style: none;
}

.deck li {
  padding: 0.75rem 0 1.75rem;
  border-top: 1px solid var(--line);
}

.deck-number {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.deck-art {
  position: relative;
  aspect-ratio: 4 / 3;
  margin: 0.5rem 0 0.875rem;
}

.deck-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
}

.deck-name {
  display: block;
  font-size: 1.1875rem;
  line-height: 1.2;
}

.deck .scientific {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9375rem;
  line-height: 1.35;
}

@media (min-width: 40rem) {
  .deck {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 68rem) {
  .deck {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .deck-name {
    font-size: 1.0625rem;
  }
}

/* ---------- Test example (Plate III) ---------- */

.quiz {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem clamp(2rem, 5vw, 5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.quiz-figure {
  margin: 0;
}

.quiz-stage {
  position: relative;
  aspect-ratio: 6 / 5;
}

.quiz-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.quiz-prompt {
  margin-bottom: 1.25rem;
  font-size: clamp(1.625rem, 1.2rem + 1.6vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.quiz-choices {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quiz-choices li,
.choice {
  border: 1px solid var(--line);
  border-radius: 0.625rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--ink);
}

.quiz-choices li {
  padding: 0.875rem 1.125rem;
}

.quiz-choices li.has-choice {
  padding: 0;
  border: 0;
}

.choice {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  width: 100%;
  min-height: 3.5rem;
  padding: 0.75rem 1.125rem;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.choice:hover {
  border-color: var(--ink);
}

.choice[aria-disabled="true"] {
  cursor: default;
}

.choice[aria-disabled="true"]:hover {
  border-color: var(--line);
}

.choice[data-state="dim"] {
  color: var(--muted);
}

.choice[data-state="correct"],
.choice[data-state="correct"]:hover {
  border-color: var(--good-line);
  background: var(--good-bg);
}

.choice[data-state="wrong"],
.choice[data-state="wrong"]:hover {
  border-color: var(--bad-line);
  background: var(--bad-bg);
}

.choice-tag {
  font-family: var(--sans);
  font-size: 0.875rem;
  white-space: nowrap;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: 1rem;
}

.link-button {
  min-height: 2.75rem;
  padding: 0.5rem 0;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 1rem;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  cursor: pointer;
}

.quiz-answer {
  margin-top: 1rem;
  font-family: var(--sans);
  font-size: 1rem;
}

.quiz-answer summary {
  width: fit-content;
  padding-block: 0.5rem;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  cursor: pointer;
}

.quiz-feedback {
  margin-top: 1rem;
}

.quiz-feedback:empty {
  display: none;
}

.quiz-verdict {
  margin: 0;
  padding: 0.75rem 1.125rem;
  border-radius: 0.625rem;
  background: var(--surface);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
}

.quiz-verdict[data-state="correct"] {
  background: var(--good-bg);
  color: var(--good-line);
}

.quiz-verdict[data-state="wrong"] {
  background: var(--bad-bg);
  color: var(--bad-line);
}

.quiz-identity {
  margin: 1rem 0 0;
  font-size: 1.75rem;
  line-height: 1.15;
}

.quiz-identity .scientific {
  display: block;
  margin-top: 0.25rem;
  font-size: 1.125rem;
}

.quiz-reset-note {
  margin-top: 0.25rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--muted);
}

.test-notes {
  margin: 2rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-size: 1.0625rem;
}

.test-notes li + li {
  margin-top: 0.625rem;
}

.rules {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 0.8125rem;
}

.rules li {
  padding: 0.3125rem 0.75rem;
  border-radius: 2rem;
  background: var(--surface);
}

@media (min-width: 56rem) {
  .quiz {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- In brief (specimen label) ---------- */

.brief .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem clamp(2rem, 5vw, 5rem);
}

.brief-intro p {
  max-width: 26rem;
  margin-top: 1rem;
}

.specimen-label {
  padding: 0.3125rem;
  border: 1px solid var(--ink);
}

.specimen-label dl {
  margin: 0;
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid var(--ink);
}

.specimen-label .row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.125rem 1.5rem;
  padding-block: 0.875rem;
  border-top: 1px solid var(--line);
}

.specimen-label .row:first-child {
  padding-top: 0;
  border-top: 0;
}

.specimen-label .row:last-child {
  padding-bottom: 0;
}

.specimen-label dt {
  padding-top: 0.3em;
}

.specimen-label dd {
  margin: 0;
}

.brief-link {
  margin-top: 1.25rem;
  font-family: var(--sans);
  font-size: 1rem;
}

@media (min-width: 36rem) {
  .specimen-label .row {
    grid-template-columns: 10.5rem minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 56rem) {
  .brief .wrap {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }
}

/* ---------- Closing ---------- */

.closing .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem 3rem;
}

.closing p {
  max-width: var(--measure);
}

.closing-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.75rem;
  margin-top: 0.5rem;
}

.mail-link {
  font-family: var(--sans);
  font-size: 1rem;
  overflow-wrap: anywhere;
}

@media (min-width: 56rem) {
  .closing .wrap {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- Document pages (Help, Privacy) ---------- */

.page-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem 3rem;
  padding-block: clamp(1.5rem, 4vw, 3.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-head h1 {
  margin-top: 0.75rem;
  font-size: clamp(2.5rem, 1.5rem + 4.4vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
}

.page-intro {
  max-width: var(--measure);
  margin-top: 1.5rem;
  font-size: clamp(1.1875rem, 1rem + 0.6vw, 1.375rem);
  line-height: 1.5;
}

.page-ornament {
  justify-self: start;
  margin: 0;
}

.page-ornament img {
  width: auto;
  max-height: 13rem;
}

.page-ornament-wide img {
  width: min(100%, 20rem);
  max-height: none;
}

@media (min-width: 56rem) {
  .page-head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-ornament {
    justify-self: end;
  }

  .page-ornament img {
    max-height: 17rem;
  }
}

.doc {
  border-top: 1px solid var(--line);
  padding-block: clamp(2rem, 5vw, 3.5rem) var(--section-space);
}

.doc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem 4rem;
}

.doc-body {
  max-width: 42rem;
}

.doc-section {
  padding-block: 2rem;
  border-top: 1px solid var(--line);
}

.doc-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.doc-section h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.625rem, 1.3rem + 1.2vw, 2.125rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.doc-section h3 {
  margin: 1.75rem 0 0.5rem;
  font-size: 1.3125rem;
  line-height: 1.25;
}

.doc-section h2 + h3,
.doc-section h3:first-child {
  margin-top: 0;
}

.section-number {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.toc {
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.toc .label {
  margin: 0;
}

.toc ol {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
  border-top: 1px solid var(--line);
}

.toc a {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  padding-block: 0.625rem;
  color: var(--ink);
  text-decoration: none;
}

.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  line-height: 1.6rem;
  color: var(--accent);
}

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

@media (min-width: 56rem) {
  .doc-grid {
    grid-template-columns: 15rem minmax(0, 1fr);
  }

  .doc-aside {
    position: sticky;
    top: 1.5rem;
    align-self: start;
  }
}

.review-note {
  margin: 0 0 2rem;
  padding: 0.875rem 1.125rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  font-family: var(--sans);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.contact-card {
  margin: 0;
  padding: 0.3125rem;
  border: 1px solid var(--ink);
}

.contact-card-inner {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--ink);
}

.contact-address {
  display: inline-block;
  margin-top: 0.375rem;
  font-size: clamp(1.125rem, 0.6rem + 2.6vw, 2rem);
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.contact-card p {
  margin-top: 1.25rem;
  font-size: 1.0625rem;
}

.contact-card p.label {
  margin: 0;
  font-size: 0.75rem;
}

.guide {
  margin: 0;
}

.guide dt {
  margin-top: 1.5rem;
  font-size: 1.3125rem;
  line-height: 1.25;
}

.guide dt:first-child {
  margin-top: 0;
}

.guide dd {
  margin: 0.375rem 0 0;
}

.pointer {
  margin-top: 1.25rem;
  font-family: var(--sans);
  font-size: 1rem;
}

.external-links {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 1rem;
}

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

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 6vw, 4rem) 2rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem 3rem;
}

.site-footer h2 {
  margin-bottom: 0.625rem;
}

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

.site-footer li + li {
  margin-top: 0.375rem;
}

.site-footer a {
  color: var(--ink);
  text-decoration-color: var(--line);
}

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

.footer-brand p {
  margin-top: 0.5rem;
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--muted);
}

.sources {
  color: var(--muted);
}

.sources b {
  font-weight: 600;
  color: var(--ink);
}

.footer-legal {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--muted);
}

.footer-legal p {
  margin: 0;
}

.footer-legal p + p {
  margin-top: 0.375rem;
}

@media (min-width: 46rem) {
  .footer-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.7fr) minmax(0, 0.9fr);
  }

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

@media (min-width: 68rem) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr) minmax(0, 0.8fr) minmax(0, 1.5fr);
  }

  .footer-sources {
    grid-column: auto;
  }
}

/* ---------- Not found ---------- */

.not-found {
  padding-block: var(--section-space);
}

.not-found section + section {
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--line);
}

.not-found h1,
.not-found h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.5rem);
  line-height: 1.05;
}

/* ---------- Motion and print ---------- */

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

@media (prefers-reduced-motion: reduce) {
  .pose-image {
    transition: none;
  }
}

@media print {
  :root {
    --paper: #fff;
    --ink: #000;
    --muted: #333;
    --line: #bbb;
    --surface: #f2f2f2;
    --accent: #000;
  }

  .site-nav,
  .lang-nav,
  .lang-hint,
  .skip-link,
  .toc,
  .page-ornament {
    display: none;
  }

  .doc-aside {
    position: static;
  }
}