:root {
  color-scheme: light;
  --ink: #142f36;
  --muted: #4a616b;
  --teal: #006b61;
  --teal-soft: #e8f4f1;
  --line: #d5e3e5;
  --page: #f5f8f8;
  --white: #fff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-text-size-adjust: 100%;
  overflow-wrap: anywhere;
}
a { color: var(--teal); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid #008c80; outline-offset: 5px; border-radius: 3px; }
.skip-link { position: absolute; top: -100px; left: 16px; padding: 10px 16px; background: var(--white); z-index: 10; }
.skip-link:focus { top: 10px; }
.wrap { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.site-header { background: var(--white); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 21px; }
.brand { display: flex; align-items: baseline; flex-wrap: wrap; gap: 6px 14px; color: var(--ink); text-decoration: none; }
.brand strong { color: var(--teal); font-size: 25px; font-weight: 800; letter-spacing: -.04em; }
.brand span { font-size: 12px; color: var(--muted); }
.header-nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; font-weight: 600; }
.header-nav a { text-decoration: none; }
.header-nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--teal); }
.hero { padding-block: 55px 38px; max-width: 860px; }
.eyebrow { margin: 0 0 10px; color: var(--teal); font-size: 11px; font-weight: 750; letter-spacing: .18em; }
h1 { margin: 0 0 17px; font-size: clamp(28px, 3.6vw, 42px); line-height: 1.45; letter-spacing: -.04em; }
.lead { margin: 0; color: var(--muted); max-width: 730px; font-size: 16px; line-height: 1.9; }
.meta { margin: 15px 0 0; font-size: 12px; color: var(--muted); }
.layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; align-items: start; padding-bottom: 56px; }
.toc { position: sticky; top: 24px; padding-block: 6px; }
.toc p { margin: 0 0 12px; font-size: 12px; font-weight: 750; color: var(--muted); }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-block: 0 8px; }
.toc a { display: inline-block; padding-block: 3px; font-size: 13px; line-height: 1.7; text-decoration: none; }
.article { display: grid; gap: 18px; min-width: 0; }
.content-card { padding: 28px 30px; background: var(--white); border: 1px solid var(--line); border-radius: 18px; }
h2 { margin: 0 0 15px; font-size: 21px; line-height: 1.6; letter-spacing: -.02em; }
h3 { margin: 22px 0 8px; font-size: 16px; line-height: 1.7; }
p { margin: 0 0 15px; }
p:last-child, ul:last-child, ol:last-child { margin-bottom: 0; }
ol, ul { margin-block: 10px 16px; padding-left: 1.55em; }
li { padding-left: .25em; margin-bottom: 12px; }
li:last-child { margin-bottom: 0; }
li strong { font-weight: 700; }
.note { margin-top: 19px; padding: 16px 18px; background: var(--teal-soft); border-radius: 11px; font-size: 14px; }
.small { font-size: 13px; color: var(--muted); }
.contact-email { display: inline-block; margin-block: 1px 10px; font-size: 22px; font-weight: 750; }
.link-list { list-style: none; padding: 0; margin-bottom: 0; }
.link-list li { padding-left: 0; margin-bottom: 8px; }
.contact-details { margin: 16px 0 0; display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 8px 16px; font-size: 14px; }
.contact-details dt { color: var(--muted); }
.contact-details dd { margin: 0; }
.site-footer { border-top: 1px solid var(--line); background: var(--white); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; padding-block: 24px; font-size: 12px; color: var(--muted); }
.footer-inner p { margin: 0; }
@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .toc { position: static; padding: 0 0 18px; border-bottom: 1px solid var(--line); }
  .toc ul { display: flex; flex-wrap: wrap; gap: 7px 16px; }
  .toc li { margin: 0; padding: 0; }
  .toc a { padding-block: 3px; }
  .hero { padding-block: 36px 27px; }
}
@media (max-width: 560px) {
  .wrap { width: calc(100% - 32px); }
  .header-inner { align-items: flex-start; flex-direction: column; gap: 10px; padding-block: 16px; }
  .brand strong { font-size: 24px; }
  .header-nav { gap: 20px; }
  .content-card { padding: 22px 20px; border-radius: 15px; }
  h2 { font-size: 20px; }
  .lead { font-size: 15px; }
  .contact-email { font-size: 21px; }
  .contact-details { grid-template-columns: 54px minmax(0, 1fr); gap: 8px 10px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  body { background: white; font-size: 10pt; line-height: 1.7; }
  .skip-link, .header-nav, .toc { display: none; }
  .wrap { width: 100%; }
  .hero { padding-block: 18px 22px; }
  .layout { display: block; }
  .content-card { padding: 16px 0; border: 0; border-top: 1px solid var(--line); border-radius: 0; }
  h2, h3 { break-after: avoid; }
  h1 { font-size: 24pt; }
  h2 { font-size: 15pt; }
  .site-header, .site-footer { border-color: var(--line); }
}