/* 使い方ガイド。サイト共通の色・書体を引き継ぐ。 */
.skip-link { position: absolute; left: 16px; top: -80px; padding: 12px 20px; background: var(--card); z-index: 500; }
.skip-link:focus { top: 8px; }

/* ヘッダーと導入 */
.guide-header .hdr-nav { gap: 20px; }
.guide-header .hdr-nav > a[href$="/guide/"] { color: var(--txt); }
.guide-shell { width: min(1120px, 100%); margin: 0 auto; padding: 32px 32px 80px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; font-size: 12px; color: var(--txt3); margin-bottom: 32px; }
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: var(--txt3); }
.breadcrumbs a { text-underline-offset: 3px; }
.guide-intro { max-width: 800px; margin-bottom: 32px; }
.guide-intro h1 { font-size: clamp(30px, 4vw, 46px); line-height: 1.4; letter-spacing: -.02em; }
html:lang(en) .guide-intro h1 { line-height: 1.15; }
.guide-intro .intro-text { font-size: 16px; color: var(--txt2); margin-top: 20px; max-width: 42em; }
.guide-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 16px; color: var(--txt3); font-size: 12px; }

/* ガイド間のタブ */
.guide-tabs { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.guide-tabs a { display: flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 16px; font-size: 13px; text-decoration: none; border-radius: 8px; border: 1px solid var(--line); transition: background-color .15s var(--ease); }
.guide-tabs a:hover { background: var(--raised); }
.guide-tabs [aria-current="page"], .guide-tabs [aria-current="page"]:hover { background: var(--txt); border-color: var(--txt); color: var(--card); }

/* 目次と本文の段組み */
.guide-layout { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 48px; padding-top: 32px; }
.guide-toc { position: sticky; top: calc(var(--hdr) + 24px); align-self: start; font-size: 13px; }
.guide-toc summary { list-style: none; color: var(--txt3); }
.guide-toc summary::-webkit-details-marker { display: none; }
.guide-toc details[open] summary { margin-bottom: 12px; }
.guide-toc ol { list-style: none; display: grid; gap: 12px; }
.guide-toc a { text-decoration: none; color: var(--txt2); transition: color .15s var(--ease); }
.guide-toc a:hover { color: var(--txt); text-decoration: underline; text-underline-offset: 4px; }

/* 本文 */
.guide-article { min-width: 0; }
.guide-article p a, .guide-article li a { color: var(--accent); text-underline-offset: 4px; }
.guide-article p + p { margin-top: 12px; }
.guide-article strong { font-weight: 500; color: var(--txt); }
.guide-section { margin-bottom: 48px; scroll-margin-top: calc(var(--hdr) + 24px); }
.guide-section + .guide-section { padding-top: 32px; border-top: 1px solid var(--line); }
.guide-section h2 { font-size: 22px; line-height: 1.5; margin-bottom: 16px; }
html:lang(en) .guide-section h2 { line-height: 1.3; }
.guide-section > p { color: var(--txt2); max-width: 640px; }
.guide-note { background: var(--raised); padding: 16px 20px; border-radius: 12px; font-size: 14px; margin: 24px 0; }
.guide-note p { color: var(--txt2); max-width: 640px; }
.guide-note p + p { margin-top: 4px; }

/* 手順: 説明文と実画面を並べる */
.guide-step { display: grid; grid-template-columns: minmax(0, 1fr) min(40%, 320px); gap: 40px; align-items: start; }
.step-title { display: flex; gap: 12px; align-items: baseline; margin-bottom: 16px; }
.step-title span { font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--accent); font-size: 15px; }
.step-title h2 { margin-bottom: 0; }
.step-copy > p { color: var(--txt2); }
.step-copy ul, .guide-list { padding-left: 20px; color: var(--txt2); }
.step-copy ul { margin-top: 16px; }
.step-copy li + li, .guide-list li + li { margin-top: 12px; }
.step-copy .step-tip { margin-top: 20px; font-size: 14px; color: var(--txt2); border-top: 1px solid var(--line); padding-top: 16px; }
.step-tip p { color: var(--txt2); }

/* 実画面: トップの .phone と同じ本体色と影で、画面全体を見せる。比率指定で幅が変わっても角の丸みが揃う */
.guide-shot { width: 100%; }
.guide-shot img { display: block; width: 100%; height: auto; padding: 2.5%; background: #0d0c0b; border-radius: 16% / 7.4%; box-shadow: 0 0 0 1px rgba(31, 27, 22, .16), 0 8px 24px rgba(31, 27, 22, .12); }
.guide-shot figcaption { font-size: 13px; line-height: 20px; margin-top: 16px; color: var(--txt3); }

/* 確認リスト */
.guide-checks { list-style: none; counter-reset: check; }
.guide-checks li { position: relative; padding: 16px 0 16px 32px; border-bottom: 1px solid var(--line); color: var(--txt2); }
.guide-checks li:first-child { padding-top: 0; }
.guide-checks li:last-child { padding-bottom: 0; border-bottom: 0; }
.guide-checks li::before { counter-increment: check; content: counter(check); position: absolute; left: 0; top: 16px; font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--txt3); }
.guide-checks li:first-child::before { top: 0; }

/* 症状と関連ガイドへのリンク */
.symptom-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.guide-related { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--line); }
.related-label { grid-column: 1 / -1; font-size: 13px; color: var(--txt3); }
.symptom-links a, .related-link { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 56px; padding: 12px 20px; color: var(--txt); text-decoration: none; background: var(--card); border: 1px solid var(--line); border-radius: 12px; transition: background-color .15s var(--ease); }
.symptom-links a:hover, .related-link:hover { background: var(--raised); }
.symptom-links a::after { content: "↓"; color: var(--txt3); }
.related-link::after { content: "→"; color: var(--txt3); }
.guide-contact { font-size: 13px; color: var(--txt3); margin-top: 32px; }

/* 広い画面: 目次は常に開き、説明文を実画面の横に留める */
@media (min-width: 961px) {
  .guide-toc summary { pointer-events: none; }
}
@media (min-width: 961px) and (min-height: 600px) {
  .step-copy { position: sticky; top: calc(var(--hdr) + 24px); }
}
@media (max-width: 960px) {
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .guide-toc { position: static; background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
  .guide-toc summary { display: flex; align-items: center; justify-content: space-between; min-height: 44px; padding: 0 16px; color: var(--txt2); cursor: pointer; }
  .guide-toc summary::after { content: ""; width: 8px; height: 8px; margin-top: -4px; border-right: 1.5px solid var(--txt3); border-bottom: 1.5px solid var(--txt3); transform: rotate(45deg); transition: transform .15s var(--ease); }
  .guide-toc details[open] summary { margin-bottom: 0; }
  .guide-toc details[open] summary::after { margin-top: 4px; transform: rotate(-135deg); }
  .guide-toc ol { gap: 0; padding: 0 16px 8px; }
  .guide-toc a { display: block; padding: 8px 0; }
}
@media (max-width: 640px) {
  .guide-shell { padding: 24px 20px 64px; }
  .guide-header .hdr-nav { gap: 12px; }
  .guide-header .hdr-logo { font-size: 13px; }
  .guide-header .hdr-nav a { font-size: 12px; }
  .guide-header .hdr-nav .guide-home { display: none; }
  .breadcrumbs { margin-bottom: 24px; }
  .guide-intro { margin-bottom: 24px; }
  .guide-intro h1 { font-size: 30px; letter-spacing: 0; }
  .guide-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-tabs a { min-height: 40px; padding: 0 8px; }
  .guide-layout { padding-top: 24px; gap: 24px; }
  .guide-step { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .guide-shot { max-width: 280px; margin: 0 auto; }
  .guide-section { margin-bottom: 40px; }
  .symptom-links, .guide-related { grid-template-columns: minmax(0, 1fr); }
}