:root {
  --manual-ink: #29332f;
  --manual-muted: #59645f;
  --manual-accent: #a64011;
  --manual-paper: #fff;
  --manual-warm: #faf7f1;
  --manual-line: #d8ddd6;
  --manual-radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--manual-ink); background: var(--manual-warm); font: 16px/1.9 "Yu Gothic", Meiryo, sans-serif; }
a { color: var(--manual-accent); text-underline-offset: .2em; overflow-wrap: anywhere; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--manual-accent); outline-offset: 4px; }
.manual-skip { position: absolute; left: 12px; top: -100px; z-index: 5; background: white; padding: 12px; }
.manual-skip:focus { top: 12px; }
.manual-header { border-bottom: 1px solid var(--manual-line); padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.manual-brand img { display: block; width: 160px; height: auto; }
.manual-header__label { color: var(--manual-muted); font-size: 13px; }
.manual-layout { max-width: 1440px; margin: auto; }
.manual-navigation { padding: 20px; }
.manual-navigation summary { cursor: pointer; font-weight: bold; }
.manual-navigation ol { list-style: none; padding: 0; }
.manual-navigation a { display: block; padding: 7px 0; text-decoration: none; font-size: 14px; }
.manual-navigation a:hover { text-decoration: underline; }
.manual-main { background: var(--manual-paper); padding: 24px 20px 60px; min-width: 0; }
.manual-cover { padding: 24px 0 32px; border-bottom: 3px solid var(--manual-accent); }
.manual-eyebrow { font-size: 13px; letter-spacing: .1em; font-weight: bold; color: var(--manual-accent); }
h1 { font-size: clamp(27px, 4vw, 42px); line-height: 1.5; margin: 16px 0; }
.manual-meta { color: var(--manual-muted); font-size: 13px; }
.manual-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.manual-button { display: inline-block; padding: 10px 18px; border: 1px solid var(--manual-accent); border-radius: 6px; font: inherit; font-weight: bold; background: white; color: var(--manual-accent); text-decoration: none; cursor: pointer; }
.manual-button--primary { color: white; background: var(--manual-accent); }
.manual-button[hidden] { display: none; }
.manual-toc { padding: 24px 0; }
.manual-toc ol { padding-left: 0; list-style: none; }
.manual-toc a { text-decoration: none; }
.manual-chapter { padding: 24px 0; }
.manual-chapter h2 { font-size: 25px; line-height: 1.6; padding: 16px 0; border-bottom: 2px solid var(--manual-accent); }
.manual-section { padding-top: 16px; scroll-margin-top: 20px; }
.manual-section h3 { font-size: 20px; line-height: 1.6; border-left: 4px solid var(--manual-accent); padding-left: 12px; }
.manual-section p { margin: 12px 0; }
.manual-section li { margin: 10px 0; padding-left: 4px; }
.manual-section ol, .manual-section ul { padding-left: 25px; }
.manual-note { margin: 20px 0; padding: 14px 18px; background: var(--manual-warm); border-left: 3px solid var(--manual-accent); border-radius: 0 var(--manual-radius) var(--manual-radius) 0; }
.manual-figure { margin: 24px 0; }
.manual-figure a { display: block; }
.manual-figure img { display: block; max-width: 100%; height: auto; max-height: 650px; object-fit: contain; border: 1px solid var(--manual-line); }
.manual-figure figcaption { margin-top: 8px; color: var(--manual-muted); font-size: 13px; }
.manual-footer { border-top: 1px solid var(--manual-line); padding: 24px; text-align: center; font-size: 14px; }
@media (min-width: 1000px) {
  .manual-layout { display: grid; grid-template-columns: 265px minmax(0, 1fr); }
  .manual-navigation { position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 28px 22px; }
  .manual-main { padding: 40px 60px 80px; }
}
/* Webは公式LPの書体・配色に揃え、印刷の組版には影響させない。 */
@media screen {
  :root {
    --manual-ink: #3b2d23;
    --manual-muted: #74665b;
    --manual-accent: #a64011;
    --manual-warm: #fff8ef;
    --manual-line: #eedbc8;
    --manual-orange: #f47a24;
    --manual-orange-soft: #fff0df;
    --manual-green: #4caf72;
    --manual-green-dark: #1f5a33;
    --manual-green-soft: #edf8f0;
    --manual-shadow: 0 8px 24px rgba(129, 83, 42, .08);
    --manual-header-height: 69px;
  }
  body { font-family: "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; font-weight: 500; -webkit-font-smoothing: antialiased; }
  a:hover { color: #85330e; }
  .manual-print-only, .manual-toc { display: none; }
  .manual-visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .manual-search[hidden], .manual-search__panel[hidden], .manual-outline[hidden], .manual-outline__chapter[hidden] { display: none; }

  .manual-header { position: relative; z-index: 30; flex-wrap: wrap; justify-content: flex-start; gap: 12px 18px; min-height: var(--manual-header-height); padding: 12px clamp(16px, 2.4vw, 24px); background: #fff; border-bottom-color: var(--manual-line); }
  .manual-brand img { width: 150px; }
  .manual-header__label { color: var(--manual-muted); }
  .manual-header__pdf { display: inline-flex; align-items: center; min-height: 40px; margin-left: auto; padding: 6px 16px; color: var(--manual-accent); background: #fff; border: 1px solid var(--manual-accent); border-radius: 24px; font-size: 14px; font-weight: 700; text-decoration: none; }
  .manual-header__pdf:hover { background: var(--manual-orange-soft); }

  .manual-search { position: relative; }
  .manual-search input { width: 100%; min-height: 44px; padding: 10px 16px; color: var(--manual-ink); background: var(--manual-warm); border: 1.5px solid #d8c4b1; border-radius: 999px; font: inherit; font-size: 15px; }
  .manual-search input:focus-visible { outline: 3px solid var(--manual-orange); outline-offset: 1px; background: #fff; }
  .manual-search__panel { position: absolute; z-index: 40; top: calc(100% + 8px); left: 0; right: 0; max-height: 60vh; overflow-y: auto; padding: 8px; background: #fff; border: 1px solid var(--manual-line); border-radius: 16px; box-shadow: 0 8px 24px rgba(129, 83, 42, .12); }
  #manual-search-status { margin: 4px 10px 6px; color: var(--manual-muted); font-size: 13px; line-height: 1.6; }
  #manual-search-status:empty { display: none; }
  #manual-search-results { margin: 0; padding: 0; list-style: none; }
  #manual-search-results a { display: block; padding: 8px 10px; color: var(--manual-ink); border-radius: 10px; text-decoration: none; }
  #manual-search-results a:hover, #manual-search-results a:focus-visible { background: var(--manual-orange-soft); }
  #manual-search-results b { display: block; font-size: 14px; line-height: 1.6; }
  #manual-search-results span { display: block; color: var(--manual-muted); font-size: 13px; line-height: 1.6; }

  .manual-navigation { background: var(--manual-warm); }
  .manual-navigation summary { display: flex; align-items: center; gap: 10px; min-height: 44px; color: var(--manual-ink); list-style: none; }
  .manual-navigation summary::-webkit-details-marker { display: none; }
  .manual-navigation__current { flex: 1; min-width: 0; overflow: hidden; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
  .manual-navigation__toggle { flex: none; padding: 4px 10px; color: var(--manual-accent); background: #fff; border: 1px solid var(--manual-line); border-radius: 999px; font-size: 13px; font-weight: 800; line-height: 1.6; }
  .manual-navigation__title { margin: 0 0 8px; font-weight: 800; }
  .manual-navigation ol { display: grid; gap: 2px; margin: 8px 0 0; }
  .manual-navigation ol a { padding: 8px 10px; border-radius: 8px; line-height: 1.6; }
  .manual-navigation ol a:hover { background: var(--manual-orange-soft); text-decoration: none; }
  .manual-navigation ol a[aria-current="true"] { color: #fff; background: var(--manual-accent); }
  .manual-navigation__pdf { margin-top: 14px; padding: 8px 10px; font-weight: 700; }

  .manual-main { padding: clamp(20px, 3vw, 40px) clamp(18px, 4vw, 60px) 80px; }
  .manual-intro { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; padding: clamp(18px, 2.4vw, 26px); background: var(--manual-warm); border: 1px solid var(--manual-line); border-radius: 20px; }
  .manual-intro__text { flex: 1 1 320px; min-width: 0; }
  .manual-eyebrow { display: inline-block; margin: 0 0 6px; padding: 3px 12px; border-radius: 24px; background: var(--manual-orange-soft); font-size: 12px; font-weight: 700; }
  .manual-intro__title { margin: 0; font-size: clamp(24px, 3vw, 32px); line-height: 1.45; letter-spacing: .025em; word-break: keep-all; }
  .manual-intro__meta { margin: 4px 0 0; color: var(--manual-muted); font-size: 13px; line-height: 1.7; }
  .manual-actions { gap: 10px; margin: 0; }
  .manual-button { border-radius: 24px; transition: background-color .15s; }
  .manual-button:hover { background: var(--manual-orange-soft); }
  .manual-button--primary:hover { color: #fff; background: #85330e; }

  .manual-discovery { padding: 28px 0 8px; }
  .manual-discovery h2 { margin: 0 0 14px; font-size: 22px; }
  .manual-purpose { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 12px; }
  .manual-purpose a { display: flex; flex-direction: column; gap: 2px; padding: 16px 18px; color: var(--manual-ink); background: #fff; border: 1px solid var(--manual-line); border-radius: 16px; box-shadow: var(--manual-shadow); line-height: 1.6; text-decoration: none; }
  .manual-purpose a:hover { color: var(--manual-ink); background: var(--manual-warm); border-color: var(--manual-orange); }
  .manual-purpose span { color: var(--manual-accent); font-size: 12px; font-weight: 800; }
  .manual-purpose b { font-size: 16px; }

  .manual-chapter { scroll-margin-top: 90px; }
  .manual-chapter h2 { margin: 0 0 8px; padding: 16px 20px; border: 0; border-radius: 16px; background: var(--manual-orange-soft); font-size: clamp(21px, 2.4vw, 25px); }
  .manual-section { padding-top: 24px; scroll-margin-top: 90px; }
  .manual-section h3 { border-left-color: var(--manual-orange); }
  .manual-note { border-left-color: var(--manual-orange); }
  .manual-figure img { border-radius: 12px; box-shadow: var(--manual-shadow); }
  .manual-section .manual-done { margin: 16px 0; padding: 12px 16px; color: var(--manual-green-dark); background: var(--manual-green-soft); border: 1.5px solid var(--manual-green); border-radius: 10px; }
  .manual-done__label { margin-right: 1em; font-weight: 700; }
  .manual-done__separator { display: none; }
  .manual-pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; margin: 20px 0 12px; padding-top: 14px; border-top: 1px dashed var(--manual-line); font-size: 14px; }
  .manual-pager a { display: inline-flex; align-items: center; min-height: 40px; padding: 6px 14px; color: var(--manual-accent); background: #fff; border: 1px solid var(--manual-line); border-radius: 10px; font-weight: 700; line-height: 1.5; text-decoration: none; }
  .manual-pager a:hover { background: var(--manual-orange-soft); border-color: var(--manual-orange); }
  .manual-pager__next { margin-left: auto; }

  .manual-outline { display: none; }
  .manual-footer { background: #fff; }
  .manual-footer p { margin: 8px 0 0; color: var(--manual-muted); font-size: 13px; }
}
@media screen and (max-width: 999px) {
  .manual-navigation { position: sticky; top: 0; z-index: 25; padding: 8px 16px; border-bottom: 1px solid var(--manual-line); box-shadow: var(--manual-shadow); }
  .manual-navigation .manual-search { margin-bottom: 4px; }
  .manual-navigation .manual-search input { background: #fff; border-radius: 12px; }
  .manual-navigation .manual-search__panel { position: static; max-height: 55vh; margin-top: 4px; padding: 6px; border-radius: 12px; box-shadow: none; }
  .manual-navigation details[open] { max-height: 60vh; max-height: 60dvh; overflow-y: auto; }
  .manual-navigation__title { display: none; }
  .manual-chapter, .manual-section { scroll-margin-top: 130px; }
}
@media screen and (min-width: 1000px) {
  .manual-header { position: sticky; top: 0; }
  .manual-header .manual-search { flex: 1 1 320px; max-width: 520px; margin-left: auto; }
  .manual-header .manual-search:not([hidden]) + .manual-header__pdf { margin-left: 0; }
  .manual-layout { grid-template-columns: 250px minmax(0, 1fr); }
  .manual-navigation { top: var(--manual-header-height); height: calc(100vh - var(--manual-header-height)); }
  .manual-navigation summary { display: none; }
}
@media screen and (min-width: 1240px) {
  .manual-layout:has(> .manual-outline:not([hidden])) { grid-template-columns: 250px minmax(0, 1fr) 230px; }
  .manual-outline { position: sticky; top: var(--manual-header-height); display: block; align-self: start; max-height: calc(100vh - var(--manual-header-height)); overflow-y: auto; padding: 40px 18px 24px; background: #fff; border-left: 1px solid var(--manual-line); }
  .manual-outline__eyebrow { margin: 0 0 4px; color: var(--manual-muted); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
  .manual-outline__title { margin: 0 0 10px; font-size: 14px; font-weight: 800; line-height: 1.5; }
  .manual-outline ol { display: grid; gap: 2px; margin: 0; padding: 0; list-style: none; }
  .manual-outline a { display: block; padding: 6px 10px; color: #5f5147; border-left: 2px solid var(--manual-line); font-size: 13px; line-height: 1.6; text-decoration: none; }
  .manual-outline a:hover { color: var(--manual-accent); }
  .manual-outline a[aria-current="true"] { color: var(--manual-accent); border-left-color: var(--manual-orange); font-weight: 800; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .manual-button { transition: none; } }
@page { size: A4 portrait; margin: 17mm 16mm 19mm; }
@media print {
  html { scroll-behavior: auto; }
  body { background: white; font-size: 11pt; line-height: 1.8; }
  .manual-header, .manual-navigation, .manual-actions, .manual-footer, .manual-skip, .manual-screen-only { display: none; }
  .manual-layout { display: block; max-width: none; }
  .manual-main { padding: 0; }
  .manual-cover { padding-top: 40mm; min-height: 230mm; border-bottom: 0; break-after: page; }
  h1 { font-size: 30pt; }
  .manual-toc { break-after: page; }
  .manual-toc li { margin: 5pt 0; }
  .manual-chapter { padding: 0; break-before: page; }
  .manual-chapter h2 { margin-top: 0; padding-top: 0; font-size: 19pt; }
  .manual-section { padding-top: 4mm; }
  .manual-section ol { break-inside: avoid; }
  .manual-section li { margin: 5pt 0; }
  .manual-section h3 { font-size: 14pt; }
  h2, h3 { break-after: avoid; }
  p { orphans: 3; widows: 3; }
  li, .manual-note, .manual-figure { break-inside: avoid; }
  .manual-figure { margin: 5mm 0; }
  .manual-figure img { max-height: 112mm; width: auto; max-width: 100%; }
  .manual-figure figcaption, .manual-meta { font-size: 9pt; }
  .manual-note { padding: 3mm 4mm; background: #faf7f1; break-before: avoid; }
  a { color: inherit; }
}