:root {
  color-scheme: light;
  --background: #FAF9F6;
  --surface: #FFFFFF;
  --ink: #202320;
  --secondary: #6F746F;
  --green: #328A46;
  --green-dark: #236936;
  --soft: #EAF4E9;
  --border: #E7EAE5;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body {
  margin: 0; background: var(--background); color: var(--ink);
  font-family: "Noto Sans JP", "Yu Gothic", "Hiragino Sans", "Noto Sans CJK JP", "Malgun Gothic", Arial, sans-serif;
  font-size: 15px; line-height: 1.85; letter-spacing: 0; overflow-wrap: anywhere;
}
a { color: var(--green-dark); text-underline-offset: 4px; }
a:hover { color: var(--green); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--green); outline-offset: 4px; border-radius: 4px; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner, nav, main, footer > p { width: min(100% - 32px, 760px); margin-inline: auto; }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 24px; font-weight: 600; text-decoration: none; color: var(--ink); }
.brand img { object-fit: contain; }
.languages { position: relative; }
.languages summary { cursor: pointer; padding: 10px 0 10px 12px; min-height: 44px; font-size: 14px; }
.languages ul {
  position: absolute; top: 100%; right: 0; z-index: 2; min-width: 144px;
  margin: 0; padding: 8px; list-style: none; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px;
}
.languages a { display: block; padding: 8px 12px; text-decoration: none; }
.languages a[aria-current] { background: var(--soft); }
nav { display: flex; flex-wrap: wrap; column-gap: 24px; row-gap: 0; }
nav a { display: flex; align-items: center; min-height: 48px; padding-block: 8px; text-decoration: none; color: var(--secondary); font-size: 14px; }
nav a[aria-current] { color: var(--green-dark); text-decoration: underline; text-decoration-thickness: 2px; }
main { padding-block: 32px 48px; }
h1 { font-size: 24px; line-height: 1.5; font-weight: 700; margin: 32px 0 8px; }
h2 { font-size: 20px; line-height: 1.55; font-weight: 600; margin: 0 0 16px; }
p { margin: 0 0 16px; }
.date { font-size: 13px; color: var(--secondary); margin-bottom: 24px; }
.contents { border-block: 1px solid var(--border); margin-block: 24px 32px; padding-block: 8px; }
.contents summary { cursor: pointer; min-height: 44px; padding: 8px 0; font-weight: 500; }
.contents ol { margin: 8px 0 16px; padding-left: 24px; }
.contents a { display: inline-block; padding-block: 4px; }
section { margin-block: 40px; }
section:last-child { margin-bottom: 0; }
ul { padding-left: 22px; }
li { margin-bottom: 8px; }
.sources { font-size: 14px; }
footer { padding-block: 24px; border-top: 1px solid var(--border); }
footer > p { color: var(--secondary); font-size: 13px; padding-top: 16px; }
.skip { position: absolute; left: 16px; top: -100px; padding: 12px; background: var(--surface); z-index: 3; }
.skip:focus { top: 12px; }
@media (max-width: 540px) {
  .header-inner { min-height: 76px; }
  nav { column-gap: 16px; }
  nav a { font-size: 13px; }
  main { padding-top: 24px; }
  h1 { margin-top: 24px; }
  h2 { font-size: 17px; }
}
@media print {
  .languages, nav, .contents, .skip { display: none; }
  body { background: white; }
  .site-header { border: 0; }
  main { width: 100%; }
  section { break-inside: avoid; }
}