:root {
  color-scheme: light dark;
  --background: #f5f5f7;
  --paper: #fff;
  --text: #1d1d1f;
  --muted: #5f6366;
  --accent: #146e32;
  --line: #d8ded9;
  --tint: #e9f2eb;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: var(--background);
  color: var(--text);
  scrollbar-color: var(--muted) var(--background);
}
* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; }
::selection { background: var(--accent); color: var(--paper); }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .2em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 2px; }
main:focus { outline: none; }
.site-header, main, footer { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 100px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: baseline; flex-wrap: wrap; gap: 9px; letter-spacing: -.02em; }
.brand strong { font-size: 1.45rem; font-weight: 650; }
.brand span { color: var(--muted); font-size: 1rem; }
.contact-link { display: inline-flex; min-height: 44px; align-items: center; font-size: .95rem; }
.introduction { max-width: 860px; padding-block: 64px 56px; }
h1, h2, h3 { line-height: 1.2; text-wrap: balance; font-weight: 600; letter-spacing: -.025em; }
h1 { font-size: 3.15rem; margin: 0 0 24px; }
.lead { font-size: 1.25rem; line-height: 1.55; max-width: 60ch; margin: 0 0 24px; color: var(--muted); }
.updated { font-size: .875rem; color: var(--muted); margin: 0; font-variant-numeric: tabular-nums; }
.document-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 64px; align-items: start; }
.contents { position: sticky; top: 32px; }
.contents summary { font-size: .95rem; font-weight: 600; min-height: 44px; cursor: pointer; }
.contents nav { display: grid; padding-top: 10px; }
.contents a { display: flex; min-height: 44px; align-items: center; color: var(--muted); line-height: 1.4; font-size: .9375rem; text-decoration: none; padding-block: 8px; }
.contents a:hover, .contents a:focus-visible { color: var(--accent); text-decoration: underline; }
article { max-width: 73ch; min-width: 0; }
article section { margin: 0 0 56px; scroll-margin-top: 24px; }
article section + section { padding-top: 40px; border-top: 1px solid var(--line); }
h2 { font-size: 1.75rem; margin: 0 0 22px; }
h3 { font-size: 1.125rem; margin: 0 0 12px; }
p { margin: 0 0 18px; }
li { margin-bottom: 12px; padding-left: 3px; }
ul { padding-left: 23px; }
strong { font-weight: 650; }
.data-list { margin: 0 0 24px; }
.data-list div { margin-bottom: 24px; }
dt { font-weight: 650; margin-bottom: 6px; }
dd { margin: 0; }
.choice-note { background: var(--tint); padding: 24px; margin-block: 26px; border-radius: 12px; }
.choice-note p:last-child { margin-bottom: 0; }
.email-link { display: inline-block; font-size: 1.25rem; font-weight: 600; min-height: 44px; }
.contact-help { color: var(--muted); font-size: .9375rem; margin-top: 12px; }
footer { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding-block: 28px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9375rem; }
footer a { display: inline-flex; align-items: center; min-height: 44px; }
.skip-link { position: fixed; top: 10px; left: 16px; z-index: 10; background: var(--paper); padding: 12px 18px; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
@media (max-width: 850px) {
  .document-layout { grid-template-columns: minmax(0, 1fr); gap: 38px; }
  .contents { position: static; border-block: 1px solid var(--line); padding-block: 20px; }
  .contents nav { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
  article { max-width: 100%; }
  h1 { font-size: 2.5rem; }
  .introduction { padding-block: 44px 36px; }
}
@media (max-width: 480px) {
  .site-header, main, footer { width: calc(100% - 40px); }
  .site-header { min-height: 114px; flex-wrap: wrap; align-content: center; gap: 4px 16px; }
  .brand { width: 100%; }
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.5rem; }
  .lead { font-size: 1.125rem; }
  .contents nav { grid-template-columns: minmax(0, 1fr); }
  .choice-note { padding: 20px; }
  .email-link { font-size: 1.125rem; }
  article section { margin-bottom: 40px; }
}
@media (prefers-color-scheme: dark) {
  :root { --background: #0b0e10; --paper: #1b2023; --text: #f5f5f7; --muted: #b3b9b6; --accent: #78e48e; --line: #353d38; --tint: #162d20; }
  ::selection { color: #0b0e10; }
}
@media print {
  :root { color-scheme: light; --background: #fff; --paper: #fff; --text: #000; --muted: #444; --accent: #000; --line: #ccc; --tint: #fff; background: white; color: black; }
  .site-header, main, footer { width: 100%; }
  .contents, .contact-link, .skip-link, footer a { display: none; }
  .document-layout { display: block; }
  article { max-width: none; }
  .introduction { padding-block: 24px; }
  article section + section { padding-top: 20px; }
  h2, h3, dt { break-after: avoid; }
  .choice-note { background: transparent; padding: 0; }
  a { color: black; }
}