:root {
  color-scheme: light;
  --cp-bg: #f7f4ef;
  --cp-bg-elevated: #fcfbf8;
  --cp-surface: #ffffff;
  --cp-surface-soft: #f5f5f5;
  --cp-border: #dedede;
  --cp-border-strong: #919191;
  --cp-text: #242424;
  --cp-text-muted: #5c5c5c;
  --cp-text-soft: #6f6f6f;
  --cp-accent: #b11f4b;
  --cp-accent-hover: #9a1a41;
  --cp-accent-soft: rgba(177, 31, 75, 0.08);
  --cp-accent-fg: #ffffff;
  --cp-success: #16a34a;
  --cp-danger: #dc2626;
  --cp-warning: #f59e0b;
  --cp-link: #0078d4;
  --cp-shadow: 0 18px 48px rgba(0, 0, 0, 0.12);
  --cp-overlay: rgba(255, 255, 255, 0.8);
  --cp-panel: rgba(255, 255, 255, 0.86);
  --cp-panel-strong: rgba(255, 255, 255, 0.96);
  --cp-sheen: rgba(255, 255, 255, 0.55);
  --cp-highlight: rgba(177, 31, 75, 0.12);
}
html[data-theme="dark"] {
  color-scheme: dark;
  --cp-bg: #3d3b3a;
  --cp-bg-elevated: #343231;
  --cp-surface: #292929;
  --cp-surface-soft: #2e2e2e;
  --cp-border: #474747;
  --cp-border-strong: #5f5f5f;
  --cp-text: #dedede;
  --cp-text-muted: #919191;
  --cp-text-soft: #b0b0b0;
  --cp-accent: #fd8ea1;
  --cp-accent-hover: #fb7b91;
  --cp-accent-soft: rgba(253, 142, 161, 0.14);
  --cp-accent-fg: #1a1a1a;
  --cp-success: #4ade80;
  --cp-danger: #f87171;
  --cp-warning: #fbbf24;
  --cp-link: #4da6ff;
  --cp-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
  --cp-overlay: rgba(41, 41, 41, 0.88);
  --cp-panel: rgba(41, 41, 41, 0.72);
  --cp-panel-strong: rgba(41, 41, 41, 0.96);
  --cp-sheen: rgba(255, 255, 255, 0.04);
  --cp-highlight: rgba(253, 142, 161, 0.12);
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1rem; }
body {
  margin: 0;
  background: var(--cp-bg);
  color: var(--cp-text);
  font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, "Yu Gothic", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}
a { color: var(--cp-accent); text-underline-offset: 0.25em; }
a:hover { color: var(--cp-accent-hover); }
a:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--cp-accent);
  outline-offset: 4px;
}
.container { width: min(1120px, calc(100% - 3rem)); margin-inline: auto; }
.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  z-index: 10;
  transform: translateY(-200%);
  padding: 0.5rem 1rem;
  background: var(--cp-surface);
}
.skip-link:focus { transform: translateY(0); }
.site-header { background: var(--cp-bg-elevated); border-bottom: 1px solid var(--cp-border); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem; padding-block: 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: 0.75rem; color: var(--cp-text); text-decoration: none; font-weight: 700; letter-spacing: 0.04em; }
.brand-mark { display: grid; place-items: center; width: 2.5rem; height: 2.5rem; background: var(--cp-accent); color: var(--cp-accent-fg); border-radius: 0.625rem; font-size: 0.875rem; flex-shrink: 0; }
.nav-list { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; list-style: none; padding: 0; margin: 0; }
.nav-list a { display: inline-block; min-height: 44px; padding-block: 0.5rem; color: var(--cp-text-muted); text-decoration: none; font-size: 0.875rem; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--cp-accent); text-decoration: underline; font-weight: 600; }
main { padding-block: 3.5rem 5rem; min-height: 60vh; }
h1, h2, h3 { line-height: 1.45; text-wrap: balance; }
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); letter-spacing: -0.03em; margin: 0.75rem 0 1.5rem; }
h2 { font-size: 1.5rem; margin: 0 0 1rem; }
h3 { font-size: 1.125rem; margin: 0 0 0.75rem; }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.5rem; }
li { margin-block: 0.5rem; }
.eyebrow { color: var(--cp-accent); font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.12em; margin-bottom: 0.75rem; }
.lead { color: var(--cp-text-muted); font-size: 1.125rem; max-width: 48rem; }
.hero { display: grid; grid-template-columns: 1.45fr 1fr; align-items: center; gap: 3rem; padding-block: 1rem 3rem; }
.hero-panel { background: var(--cp-surface); border: 1px solid var(--cp-border); border-top: 4px solid var(--cp-accent); border-radius: 16px; padding: 2rem; }
.hero-panel .step { color: var(--cp-accent); font-family: Consolas, "Courier New", Courier, monospace; font-size: 0.8125rem; font-weight: 700; }
.hero-panel h2 { font-size: 1.75rem; margin-top: 0.75rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0.625rem 1.25rem; background: var(--cp-accent); color: var(--cp-accent-fg); border: 1px solid var(--cp-accent); border-radius: 0.625rem; font-weight: 600; text-decoration: none; }
.button:hover { background: var(--cp-accent-hover); color: var(--cp-accent-fg); }
.button.secondary { background: var(--cp-surface); color: var(--cp-accent); }
.section { margin-top: 3rem; }
.section-heading { margin-bottom: 1.5rem; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.card { background: var(--cp-surface); border: 1px solid var(--cp-border); border-radius: 16px; padding: 1.75rem; }
.card p:last-child { margin-bottom: 0; }
.muted, .meta { color: var(--cp-text-muted); }
.meta { font-size: 0.875rem; }
.notice { background: var(--cp-accent-soft); border-left: 4px solid var(--cp-accent); border-radius: 0 0.625rem 0.625rem 0; padding: 1rem 1.25rem; margin-bottom: 2rem; }
.notice p:last-child { margin-bottom: 0; }
.pill { display: inline-block; border: 1px solid var(--cp-border-strong); border-radius: 0.625rem; padding: 0.25rem 0.75rem; font-size: 0.8125rem; color: var(--cp-text-muted); margin-bottom: 1rem; }
.facts { display: grid; grid-template-columns: 9rem 1fr; gap: 0; margin: 0; }
.facts dt, .facts dd { border-bottom: 1px solid var(--cp-border); margin: 0; padding: 0.875rem 0; }
.facts dt { color: var(--cp-text-muted); font-weight: 600; padding-right: 1rem; }
.article { max-width: 860px; }
.article > section { margin-top: 2.5rem; }
.article > section > h2 { border-bottom: 1px solid var(--cp-border); padding-bottom: 0.75rem; }
.article h3 { margin-top: 1.5rem; }
.article .section-nav { background: var(--cp-surface); border: 1px solid var(--cp-border); border-radius: 16px; padding: 1.25rem 1.5rem; }
.section-nav ul { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin: 0; list-style: none; padding: 0; }
.section-nav li { margin: 0; }
.section-nav a { display: inline-block; padding-block: 0.375rem; }
.table-wrap { overflow-x: auto; margin-block: 1.25rem; border: 1px solid var(--cp-border); border-radius: 0.625rem; }
table { border-collapse: collapse; width: 100%; background: var(--cp-surface); font-size: 0.9375rem; }
caption { text-align: left; padding: 0.875rem 1rem; color: var(--cp-text-muted); font-weight: 600; }
th, td { text-align: left; vertical-align: top; padding: 0.875rem 1rem; border-top: 1px solid var(--cp-border); }
th { background: var(--cp-surface-soft); font-weight: 600; }
details { border-bottom: 1px solid var(--cp-border); padding-block: 0.75rem; }
summary { cursor: pointer; font-weight: 600; min-height: 44px; padding-block: 0.5rem; }
details p { margin: 0.5rem 0 1rem; }
blockquote { border-left: 3px solid var(--cp-accent); margin-inline: 0; padding-left: 1.25rem; color: var(--cp-text-muted); }
code { background: var(--cp-surface-soft); border-radius: 0.25rem; padding: 0.125rem 0.375rem; font-family: Consolas, "Courier New", Courier, monospace; }
.site-footer { background: var(--cp-bg-elevated); border-top: 1px solid var(--cp-border); padding-block: 2.5rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.5rem 3rem; }
.footer-inner p { margin-bottom: 0.5rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; padding: 0; list-style: none; margin: 0; }
.footer-links a { display: inline-block; padding-block: 0.5rem; }
.fine-print { color: var(--cp-text-muted); font-size: 0.8125rem; margin-top: 1.5rem; }
html[data-theme="dark"] .nav-list a,
html[data-theme="dark"] .lead,
html[data-theme="dark"] .muted,
html[data-theme="dark"] .meta,
html[data-theme="dark"] .pill,
html[data-theme="dark"] .facts dt,
html[data-theme="dark"] caption,
html[data-theme="dark"] blockquote,
html[data-theme="dark"] .fine-print { color: var(--cp-text-soft); }
html[data-theme="dark"] .nav-list a:hover,
html[data-theme="dark"] .nav-list a[aria-current="page"] { color: var(--cp-accent); }
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; gap: 1.5rem; }
  .grid { grid-template-columns: 1fr; }
  .hero-panel { padding: 1.5rem; }
}
@media (max-width: 480px) {
  .container { width: calc(100% - 2rem); }
  main { padding-block: 2rem 3rem; }
  .brand { font-size: 0.875rem; letter-spacing: 0.02em; }
  .nav-list { gap: 0 0.875rem; }
  .facts { grid-template-columns: 1fr; }
  .facts dt { border-bottom: 0; padding-bottom: 0; }
  .facts dd { padding-top: 0.25rem; }
  .card { padding: 1.25rem; }
}
@media print {
  .site-header, .site-footer, .skip-link, .actions, .section-nav { display: none; }
  main { padding: 0; }
  .container { width: 100%; }
}