/* Usage guide: grouped navigation, open procedures, expandable reference. */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; word-break: keep-all; overflow-wrap: anywhere; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, figure { margin: 0; }
img { max-width: 100%; }
button { font: inherit; }
.guide-hero { padding: 52px 0 36px; }
.guide-hero .eyebrow { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 8px; }
.guide-hero h1 { font-size: 36px; line-height: 1.4; letter-spacing: -.045em; }
.guide-hero p { margin-top: 12px; color: var(--ink-2); line-height: 1.8; }
.guide-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 20px; font-size: 13px; color: var(--ink-2); }
.guide-meta b { font-family: var(--mono); font-weight: 500; }
.guide-meta a { text-decoration: underline; text-underline-offset: 3px; }
.guide-layout { display: grid; grid-template-columns: 208px minmax(0, 760px); gap: 64px; padding-top: 24px; padding-bottom: 96px; align-items: start; }
.guide-toc { position: sticky; top: calc(var(--site-header-height) + 24px); max-height: calc(100dvh - var(--site-header-height) - 48px); overflow-y: auto; padding: 4px; }
.guide-toc h2 { font-size: 13px; color: var(--ink-2); margin-bottom: 22px; }
.toc-group + .toc-group { margin-top: 28px; }
.toc-group h3 { margin: 0 0 9px; font-size: 14px; font-weight: 700; line-height: 1.5; color: var(--ink); }
.toc-group ul { list-style: none; padding: 0 0 0 10px; margin: 0 0 0 2px; border-left: 1px solid var(--rule-2); }
.toc-group a { display: block; padding: 7px 10px; border-radius: 6px; color: var(--ink-2); font-size: 14px; line-height: 1.55; }
.toc-group a:hover { color: var(--ink); background: var(--ground); }
.toc-group a[aria-current="location"] { color: var(--accent-ink); background: var(--accent-soft); font-weight: 600; }
.guide-toc-m { display: none; }
.guide-body { min-width: 0; font-size: 16px; }
.guide-body section { position: relative; margin-bottom: 76px; scroll-margin-top: 0; }
.guide-body section:last-child { margin-bottom: 0; }
.guide-body h2 { font-size: 28px; font-weight: 700; line-height: 1.4; letter-spacing: -.035em; margin-bottom: 16px; }
.guide-body h3 { font-size: 18px; line-height: 1.5; margin: 30px 0 10px; }
.guide-body p { color: var(--ink-2); line-height: 1.85; margin: 12px 0; }
.guide-body b { color: var(--ink); font-weight: 600; }
.guide-body .lede { margin: 0 0 24px; }
.guide-body .section-label { font: 500 12px/1.5 var(--sans); color: var(--accent-ink); margin: -8px 0 12px; }
.guide-body a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 4px; }
.guide-body code { font: 400 .88em/1.7 var(--mono); background: var(--ground); padding: 2px 5px; border-radius: 3px; }
.guide-body kbd { font: 500 .85em/1.6 var(--mono); border: 1px solid var(--rule-2); border-radius: 4px; padding: 2px 5px; white-space: nowrap; }
.prerequisites { padding: 20px 24px; background: var(--ground); border-radius: 12px; margin: 24px 0; font-size: 14px; }
.guide-body .prerequisites h3 { margin: 0 0 10px; font-size: 16px; }
ol.steps { list-style: none; counter-reset: step; margin: 28px 0; padding: 0; display: grid; gap: 24px; }
ol.steps > li { counter-increment: step; display: grid; grid-template-columns: 30px minmax(0, 1fr); column-gap: 14px; align-items: start; }
ol.steps > li::before { content: counter(step); grid-column: 1; grid-row: 1 / span 2; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--ground); color: var(--ink-2); font: 500 13px/1 var(--mono); }
ol.steps > li > * { grid-column: 2; }
ol.steps > li > b { line-height: 1.75; }
ol.steps > li > p { margin: 5px 0 0; font-size: 15px; }
.guide-body ul.plain { list-style: none; padding: 0; margin: 14px 0; }
.guide-body ul.plain > li { position: relative; padding-left: 17px; margin: 10px 0; font-size: 15px; line-height: 1.8; color: var(--ink-2); }
.guide-body ul.plain > li::before { content: '·'; position: absolute; left: 2px; font-weight: 700; }
.note { background: var(--ground); padding: 16px 20px; border-radius: 8px; margin: 24px 0; font-size: 14px; line-height: 1.85; color: var(--ink-2); }
.mode-choices { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 24px 0; }
.guide-body .mode-choices a { display: block; padding: 20px; border: 1px solid var(--rule); border-radius: 10px; text-decoration: none; background: var(--paper); }
.mode-choices a:hover { background: var(--ground); border-color: var(--accent); }
.mode-choices span { display: block; color: var(--accent-ink); font-size: 12px; margin-bottom: 10px; }
.mode-choices b { display: block; font-size: 16px; line-height: 1.5; }
.mode-choices i { font-style: normal; color: var(--ink-2); }
.guide-body .mode-choices p { margin: 8px 0 0; font-size: 14px; line-height: 1.7; }
figure.app-shot { margin: 24px 0; }
figure.app-shot img { display: block; width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 8px; background: #fff; }
figure.app-shot figcaption { margin-top: 10px; font-size: 13px; line-height: 1.7; color: var(--ink-2); }
img.zoom { cursor: zoom-in; }
.qa { display: grid; gap: 8px; margin-top: 24px; }
.qa details, .guide-detail { background: var(--ground); border-radius: 8px; padding: 0 20px; }
.guide-detail { margin: 14px 0; }
.guide-body details, .guide-body [id] { scroll-margin-top: 0; }
.guide-body summary { padding: 16px 0; cursor: pointer; font-size: 15px; font-weight: 600; line-height: 1.7; color: var(--ink); }
.guide-body summary::marker { color: var(--ink-2); font-size: 12px; }
.guide-body summary:hover { color: var(--accent-ink); }
.guide-body details[open] { padding-bottom: 16px; }
.guide-body details > p { font-size: 15px; margin: 0 0 12px; }
.guide-body details > :last-child { margin-bottom: 0; }
.tier { display: inline-block; font: 600 11px/1.8 var(--sans); padding: 1px 7px; border-radius: 4px; color: var(--ink-2); background: var(--paper); margin-right: 8px; vertical-align: 1px; white-space: nowrap; }
.tier.need { color: var(--accent-ink); background: var(--accent-soft); }
.notice-message { margin: 0 0 14px; padding: 0 0 0 12px; border-left: 2px solid var(--rule-2); color: var(--ink-2); font-size: 13px; line-height: 1.8; }
.kv { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 16px 24px; margin: 20px 0; font-size: 15px; line-height: 1.8; }
.kv dt { color: var(--ink); font-weight: 600; }
.kv dd { margin: 0; color: var(--ink-2); }
.guide-body .caption { margin: -4px 0 16px; font-size: 13px; }
.guide-body .next-link { font-size: 15px; margin-top: 24px; }
@media (max-width: 1100px) {
  .guide-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 36px; }
  .mode-choices { grid-template-columns: 1fr; }
  .guide-body .mode-choices a { padding: 16px 20px; }
  .mode-choices span { margin-bottom: 4px; }
}
@media (max-width: 760px) {
  .guide-hero { padding: 32px 0 24px; }
  .guide-hero h1 { font-size: 30px; }
  .guide-hero p { font-size: 15px; }
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 0; padding-bottom: 64px; }
  .guide-toc { display: none; }
  .guide-toc-m { display: block; background: var(--ground); border-radius: 8px; padding: 0 16px; margin-bottom: 36px; }
  .guide-toc-m > summary { padding: 14px 0; cursor: pointer; font-size: 15px; font-weight: 600; }
  .guide-toc-m nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 8px; padding: 4px 0 16px; }
  .guide-toc-m .toc-group { margin: 0; }
  .guide-toc-m .toc-group a { min-height: 44px; }
  .guide-body section { margin-bottom: 56px; }
  .guide-body h2 { font-size: 25px; }
  .guide-body { font-size: 15px; }
  .prerequisites { padding: 18px; }
  .kv { grid-template-columns: 1fr; gap: 4px; }
  .kv dd { margin-bottom: 14px; }
  .qa details, .guide-detail { padding-left: 16px; padding-right: 16px; }
}
@media (max-width: 380px) { .guide-toc-m nav { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .guide-toc, .guide-toc-m { display: none; }
  .guide-layout { display: block; }
  .guide-body section { margin-bottom: 36px; }
  .qa details, .guide-detail, .note { background: transparent; }
  details::details-content { display: block; }
  details > * { display: block !important; }
}