/* 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; }
.guide-header .hdr-nav { gap: 20px; }
.guide-header [aria-current="page"] { color: var(--accent); }
.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: 36px; }
.guide-intro h1 { font-size: clamp(30px, 4vw, 46px); line-height: 1.4; letter-spacing: -.025em; }
.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; }
.guide-tabs { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 32px; border-bottom: 1px solid var(--line); }
.guide-tabs a { padding: 8px 16px; font-size: 13px; text-decoration: none; border-radius: 8px; border: 1px solid var(--line); }
.guide-tabs a:hover { background: var(--raised); }
.guide-tabs [aria-current="page"] { background: var(--txt); border-color: var(--txt); color: var(--card); }
.guide-layout { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 48px; padding-top: 40px; }
.guide-toc { position: sticky; top: calc(var(--hdr) + 24px); align-self: start; font-size: 13px; }
.guide-toc p { color: var(--txt3); margin-bottom: 12px; }
.guide-toc summary { cursor: pointer; color: var(--txt2); }
.guide-toc details[open] summary { margin-bottom: 16px; }
.guide-toc ol { list-style: none; display: grid; gap: 12px; }
.guide-toc a { text-decoration: none; color: var(--txt2); }
.guide-toc a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.guide-article { min-width: 0; }
.guide-article a:not(.related-link) { color: var(--accent); text-underline-offset: 4px; }
.guide-article p + p { margin-top: 12px; }
.guide-section { margin-bottom: 56px; scroll-margin-top: calc(var(--hdr) + 24px); }
.guide-section > h2 { font-size: 24px; line-height: 1.5; margin-bottom: 20px; }
.guide-section > p { color: var(--txt2); }
.guide-note { background: var(--raised); padding: 20px 24px; border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; font-size: 14px; margin: 24px 0; }
.guide-note p { color: var(--txt2); }
.guide-note p:first-child { color: var(--txt); }
.guide-step { display: grid; grid-template-columns: minmax(0, 1fr) 232px; gap: 32px; align-items: start; border-top: 1px solid var(--line); padding-top: 28px; }
.step-title { display: flex; gap: 12px; align-items: baseline; margin-bottom: 16px; }
.step-title span { font-family: var(--mono); color: var(--accent); font-size: 15px; }
.step-title h2 { font-size: 22px; line-height: 1.5; }
.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-tip { margin-top: 20px !important; font-size: 13px; border-top: 1px solid var(--line); padding-top: 16px; }
.step-copy > div.step-tip { color: var(--txt2); }
.guide-shot { width: 100%; max-width: 280px; margin: 0 auto; }
.guide-shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 24px; background: #0d0c0b; }
.guide-shot figcaption { font-size: 12px; line-height: 1.7; margin-top: 12px; color: var(--txt3); }
.symptom-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.symptom-links a { padding: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; text-decoration: none; }
.symptom-links a::after { content: " ↓"; }
.guide-checks { list-style: none; counter-reset: check; }
.guide-checks li { position: relative; padding: 16px 0 16px 36px; border-bottom: 1px solid var(--line); color: var(--txt2); }
.guide-checks li::before { counter-increment: check; content: counter(check, decimal-leading-zero); position: absolute; left: 0; font-family: var(--mono); font-size: 13px; color: var(--accent); }
.guide-checks strong { color: var(--txt); font-weight: 500; }
.guide-related { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding-top: 32px; border-top: 1px solid var(--line); }
.related-link { display: block; padding: 20px; text-decoration: none; background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
.related-link:hover { background: var(--raised); }
.related-link span { display: block; font-size: 12px; color: var(--txt3); margin-bottom: 8px; }
.guide-contact { font-size: 13px; color: var(--txt3); margin-top: 32px; }
@media (max-width: 960px) {
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .guide-toc { position: static; padding: 20px; background: var(--raised); border-radius: 8px; }
  .guide-toc ol { display: flex; flex-wrap: wrap; gap: 12px 24px; }
}
@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 h1 { font-size: 30px; }
  .guide-tabs { gap: 8px; }
  .guide-tabs a { padding: 8px 12px; font-size: 12px; }
  .guide-layout { padding-top: 24px; }
  .guide-step { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .guide-shot { max-width: 280px; }
  .guide-section { margin-bottom: 40px; }
  .guide-note { padding: 16px 20px; }
  .symptom-links, .guide-related { grid-template-columns: minmax(0, 1fr); }
}