body.bird-open {
  --paper: #08131a;
  --ink: #f7f6f0;
  --muted: #bccbd3;
  --line: #324853;
  --accent: #d7b982;
  --hover: #d7b982;
  background: var(--paper);
  color: var(--ink);
}

.bird-open .site-header { background: var(--paper); border-bottom-color: var(--line); }
.bird-open #main-nav a.active { color: var(--accent); }
.bird-open a:hover { color: var(--accent); }
.bird-open :is(a, button):focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.bird-open ::selection { color: #08131a; background: #d7b982; }

.bird-poster {
  width: min(1240px, 90vw);
  margin: 0 auto;
  padding: 103px 0 48px;
  color: var(--ink);
  font: 17px/1.65 "DM Sans", Arial, sans-serif;
}

.bird-poster :is(h1, h2, h3, p, dl, dd, figure, blockquote, ol, ul) { margin: 0; }
.bird-poster :is(header, section, div, nav, figure, li, footer) { min-width: 0; }
.bird-poster :is(h1, h2, h3) { color: var(--ink); font-family: "Inter Tight", Arial, sans-serif; text-wrap: balance; }
.bird-poster h3 { font-size: 28px; font-weight: 600; line-height: 1.2; letter-spacing: -.025em; }
.bird-poster p { max-width: 72ch; color: var(--muted); }
.bird-poster p + p { margin-top: 16px; }
.bird-poster strong { color: var(--ink); font-weight: 600; }
.bird-poster a { text-underline-offset: 5px; text-decoration-thickness: 1px; }
.bird-poster svg {
  width: 20px;
  height: 20px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}
.bird-poster figcaption { max-width: 100ch; margin-top: 17px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.bird-poster .poster-topline { margin-bottom: 58px; color: var(--muted); font-size: 13px; }

.bird-poster .bird-heading {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 8%;
  align-items: end;
  margin-bottom: 43px;
}
.bird-poster .bird-heading h1 {
  font-size: clamp(72px, 8.5vw, 118px);
  font-weight: 600;
  line-height: .95;
  letter-spacing: -.055em;
}
.bird-poster .bird-subtitle {
  display: block;
  max-width: 22ch;
  margin-top: 29px;
  color: var(--accent);
  font-size: clamp(28px, 3.1vw, 42px);
  font-weight: 400;
  line-height: 1.13;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.bird-poster .bird-intro p { font-size: 17px; line-height: 1.65; }
.bird-poster .bird-facts {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 30px;
  padding: 25px 0;
  border-top: 1px solid var(--line);
}
.bird-poster .bird-facts dt { margin-bottom: 7px; color: var(--muted); font-size: 13px; }
.bird-poster .bird-facts dd { color: var(--ink); font-size: 16px; font-weight: 500; line-height: 1.5; }
.bird-poster .bird-links { display: flex; flex-wrap: wrap; gap: 15px 30px; margin-bottom: 32px; }
.bird-poster .bird-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding-block: 7px;
  color: var(--accent);
  font-size: 15px;
  text-decoration: underline;
}
.bird-poster .bird-links a:hover { color: var(--ink); }
.bird-poster .bird-links svg { width: 17px; height: 17px; }
.bird-poster .bird-contents {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-bottom: 38px;
  padding: 13px 0;
  border-block: 1px solid var(--line);
}
.bird-poster .bird-contents button {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 500 14px/1.4 "DM Sans", Arial, sans-serif;
  text-align: left;
  cursor: pointer;
}
.bird-poster .bird-contents button > span { color: var(--accent); font-variant-numeric: tabular-nums; }
.bird-poster .bird-contents button:hover { color: var(--accent); }
.bird-poster .bird-contents svg { margin-left: auto; }
.bird-poster .bird-cover { margin-bottom: 12px; }
.bird-poster .bird-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
  background: #10232b;
}

.bird-poster .bird-section { margin-top: 96px; scroll-margin-top: 100px; }
.bird-poster .bird-section-heading {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: start;
  gap: 8%;
  margin-bottom: 46px;
  padding-top: 28px;
  border-top: 1px solid var(--ink);
}
.bird-poster .bird-section-heading h2 {
  font-size: clamp(38px, 4.4vw, 60px);
  font-weight: 600;
  line-height: 1.03;
  letter-spacing: -.04em;
}
.bird-poster .bird-section-heading p { padding-top: 5px; }
.bird-poster .bird-question { padding: 5px 0 36px; }
.bird-poster .bird-question p {
  max-width: 29ch;
  color: var(--accent);
  font-family: "Inter Tight", Arial, sans-serif;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.15;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.bird-poster .bird-question footer { max-width: 83ch; margin-top: 22px; color: var(--muted); font-size: 16px; line-height: 1.65; }
.bird-poster .bird-journey {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  margin-top: 12px;
  padding: 0;
  list-style: none;
  counter-reset: bird-journey;
}
.bird-poster .bird-journey li { padding-top: 18px; border-top: 1px solid var(--line); counter-increment: bird-journey; }
.bird-poster .bird-journey li::before { content: "0" counter(bird-journey); display: block; margin-bottom: 20px; color: var(--accent); font-size: 13px; font-variant-numeric: tabular-nums; }
.bird-poster .bird-journey strong { display: block; margin-bottom: 11px; font-family: "Inter Tight", Arial, sans-serif; font-size: 23px; line-height: 1.2; letter-spacing: -.02em; }
.bird-poster .bird-journey span { display: block; color: var(--muted); font-size: 15px; line-height: 1.65; }

.bird-poster .bird-decision + .bird-decision { margin-top: 62px; }
.bird-poster .bird-decision-copy {
  display: grid;
  grid-template-columns: 48px 1fr 1.15fr;
  gap: 27px 4%;
  align-items: start;
  margin-bottom: 27px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.bird-poster .bird-number { padding-top: 5px; color: var(--accent); font-size: 14px; font-variant-numeric: tabular-nums; }
.bird-poster .bird-decision-copy h3 { max-width: 22ch; font-size: clamp(28px, 3vw, 38px); letter-spacing: -.035em; }
.bird-poster .bird-decision-copy p { font-size: 16px; line-height: 1.65; }
.bird-poster .bird-screen img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 720px;
  object-fit: contain;
  object-position: center top;
  background: #0e1e27;
}
.bird-poster .bird-design-notes { margin-top: 43px; border-top: 1px solid var(--line); }
.bird-poster .bird-design-notes > section {
  display: grid;
  grid-template-columns: 1fr 1.7fr;
  gap: 8%;
  padding: 25px 0;
  border-bottom: 1px solid var(--line);
}
.bird-poster .bird-design-notes h3 { font-size: 24px; }
.bird-poster .bird-design-notes p { font-size: 16px; }

.bird-poster .bird-progress { display: grid; grid-template-columns: 1fr 1fr; gap: 8%; }
.bird-poster .bird-progress > section > h3 { margin-bottom: 24px; color: var(--accent); }
.bird-poster .bird-progress ul { padding: 0; list-style: none; border-top: 1px solid var(--line); }
.bird-poster .bird-progress li { padding: 20px 0 23px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 16px; line-height: 1.65; }
.bird-poster .bird-progress li strong { display: block; margin-bottom: 8px; font-family: "Inter Tight", Arial, sans-serif; font-size: 22px; line-height: 1.25; letter-spacing: -.02em; }
.bird-poster .bird-progress li span { display: block; }
.bird-poster .bird-closing {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 8%;
  margin-top: 78px;
  padding: 32px 0 14px;
  border-top: 1px solid var(--ink);
}
.bird-poster .bird-closing h2 { color: var(--accent); font-size: clamp(34px, 3.7vw, 48px); font-weight: 400; line-height: 1.08; letter-spacing: -.035em; }
.bird-poster .bird-closing p { font-size: 19px; line-height: 1.6; }
.bird-poster .bird-footer { display: flex; justify-content: space-between; align-items: flex-start; gap: 45px; margin-top: 40px; padding-top: 30px; border-top: 1px solid var(--line); }
.bird-poster .bird-footer > p { max-width: 75ch; font-size: 13px; }
.bird-poster .bird-footer > a { display: flex; flex-shrink: 0; align-items: center; gap: 15px; font-size: 14px; line-height: 1.5; }

@media (max-width: 1050px) {
  .bird-poster .bird-heading { grid-template-columns: 1.25fr 1fr; gap: 5%; }
  .bird-poster .bird-heading h1 { font-size: clamp(66px, 9vw, 95px); }
  .bird-poster .bird-journey { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 6%; }
  .bird-poster .bird-decision-copy { grid-template-columns: 33px 1fr 1.2fr; gap: 25px 3%; }
  .bird-poster .bird-footer { display: block; }
  .bird-poster .bird-footer > a { margin-top: 24px; }
}

@media (max-width: 760px) {
  .bird-poster { padding-top: 88px; font-size: 16px; }
  .bird-poster .poster-topline { margin-bottom: 40px; font-size: 12px; }
  .bird-poster .bird-heading { grid-template-columns: 1fr; gap: 29px; margin-bottom: 32px; }
  .bird-poster .bird-heading h1 { font-size: clamp(57px, 15vw, 88px); }
  .bird-poster .bird-subtitle { margin-top: 22px; font-size: clamp(28px, 7.3vw, 36px); }
  .bird-poster .bird-intro p { font-size: 16px; }
  .bird-poster .bird-facts { grid-template-columns: 1fr; gap: 20px; padding: 23px 0; }
  .bird-poster .bird-facts > div { display: grid; grid-template-columns: 80px minmax(0, 1fr); gap: 16px; }
  .bird-poster .bird-facts dt { margin-bottom: 0; padding-top: 1px; }
  .bird-poster .bird-facts dd { font-size: 15px; }
  .bird-poster .bird-links { gap: 8px 24px; margin-bottom: 24px; }
  .bird-poster .bird-contents { grid-template-columns: 1fr; gap: 0; padding: 6px 0; margin-bottom: 28px; }
  .bird-poster .bird-contents button { min-height: 48px; }
  .bird-poster .bird-contents button + button { border-top: 1px solid var(--line); }
  .bird-poster .bird-section { margin-top: 66px; scroll-margin-top: 84px; }
  .bird-poster .bird-section-heading { grid-template-columns: 1fr; gap: 21px; margin-bottom: 31px; padding-top: 24px; }
  .bird-poster .bird-section-heading h2 { font-size: 38px; }
  .bird-poster .bird-section-heading p { padding-top: 0; }
  .bird-poster .bird-question { padding: 0 0 27px; }
  .bird-poster .bird-question p { font-size: 34px; }
  .bird-poster .bird-question footer { margin-top: 21px; font-size: 15px; }
  .bird-poster .bird-journey { gap: 28px 6%; margin-top: 9px; }
  .bird-poster .bird-journey li::before { margin-bottom: 14px; }
  .bird-poster .bird-journey strong { font-size: 22px; }
  .bird-poster .bird-journey span { font-size: 14px; }
  .bird-poster .bird-decision + .bird-decision { margin-top: 43px; }
  .bird-poster .bird-decision-copy { grid-template-columns: 28px minmax(0, 1fr); gap: 16px; margin-bottom: 23px; padding-top: 22px; }
  .bird-poster .bird-number { padding-top: 4px; }
  .bird-poster .bird-decision-copy h3 { max-width: 28ch; font-size: 30px; }
  .bird-poster .bird-decision-copy p { grid-column: 2; font-size: 16px; }
  .bird-poster figcaption { font-size: 12px; margin-top: 13px; }
  .bird-poster .bird-design-notes { margin-top: 32px; }
  .bird-poster .bird-design-notes > section { grid-template-columns: 1fr; gap: 13px; padding: 23px 0; }
  .bird-poster .bird-progress { grid-template-columns: 1fr; gap: 35px; }
  .bird-poster .bird-progress > section > h3 { margin-bottom: 20px; }
  .bird-poster .bird-progress li { padding: 19px 0 22px; }
  .bird-poster .bird-closing { grid-template-columns: 1fr; gap: 24px; margin-top: 55px; padding-top: 27px; }
  .bird-poster .bird-closing h2 { font-size: 38px; }
  .bird-poster .bird-closing p { font-size: 18px; }
  .bird-poster .bird-footer { margin-top: 30px; padding-top: 24px; }
}

@media (max-width: 420px) {
  .bird-poster .bird-journey { grid-template-columns: 1fr; }
  .bird-poster .bird-question p { font-size: 31px; }
  .bird-poster .bird-decision-copy { gap: 14px; }
}