/* App layout of machinebehavior.io: the docs tree, and the base of every Inside page (services, status, board, tour, search).
   Colours, type and spacing come from /design/tokens.css; --bg, --ink, --amber ... are mapped onto the tokens there.
   The top bar, breadcrumbs, sidebars and footer are in /design/chrome.css. */
@import url("/design/tokens.css");
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--ib-h, 54px) + 14px); }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--mb-font-sans); }
a { color: inherit; }
.mono, code, pre { font-family: var(--mb-font-mono); }

.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: none; }

/* layout */
.layout { display: grid; grid-template-columns: 290px minmax(0, 780px) 220px; gap: 0 40px; max-width: 1440px; margin: 0 auto; padding: 0 18px; }
.layout.wide { grid-template-columns: minmax(0, 1100px); justify-content: center; }
main { min-width: 0; padding: 22px 0 40px; }

/* page tree */
.side { position: sticky; top: var(--ib-h, 54px); align-self: start; max-height: calc(100vh - var(--ib-h, 54px)); overflow: auto; padding: 18px 14px 30px 0;
  border-right: 1px solid var(--line); font-size: 14px; scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.side details.side-wrap > summary { display: none; }
.space-head { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 15px; margin: 0 0 14px; }
.sp-icon { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; flex: none;
  font: 700 11px var(--mb-font-mono); color: var(--mb-on-fill); letter-spacing: 0.5px; }
.side ul { list-style: none; margin: 0; padding: 0; }
.side ul ul { padding-left: 14px; border-left: 1px solid var(--line); margin-left: 7px; }
.side li { margin: 1px 0; }
.side a { display: block; text-decoration: none; color: var(--soft); padding: 4px 8px; border-radius: 6px; line-height: 1.3; }
.side a:hover { background: var(--mb-surface-hover); color: var(--ink); }
.side a[aria-current="page"] { background: var(--mb-accent-tint); color: var(--amber); font-weight: 500; }
.side details > summary { list-style: none; display: flex; align-items: flex-start; cursor: pointer; }
.side details > summary::-webkit-details-marker { display: none; }
.side details > summary::before { content: '▸'; color: var(--dim); width: 14px; flex: none; padding-top: 4px; font-size: 11px; transition: transform .15s; }
.side details[open] > summary::before { transform: rotate(90deg); }
.side details > summary > a { flex: 1; min-width: 0; }
.side li.leaf { padding-left: 14px; }

/* page */
.crumbs { display: flex; flex-wrap: wrap; gap: 4px; font: 12px var(--mb-font-mono); color: var(--dim); margin-bottom: 10px; }
.crumbs a { text-decoration: none; color: var(--dim); }
.crumbs a:hover { color: var(--amber); }
.crumbs a + a::before { content: '/'; margin-right: 6px; color: var(--line); }
h1 { font-size: 36px; line-height: 1.1; letter-spacing: -0.8px; margin: 0 0 10px; }
.byline { display: flex; flex-wrap: wrap; gap: 4px 14px; font: 12px var(--mb-font-mono); color: var(--dim); margin-bottom: 18px; }
.byline .type { color: var(--soft); border: 1px solid var(--line); border-radius: 5px; padding: 0 6px; }
.byline .report { color: var(--soft); text-decoration-color: var(--line); text-underline-offset: 2px; }
.byline .report:hover { color: var(--amber); }
.lede { color: var(--soft); font-size: 16px; line-height: 1.55; max-width: 760px; }
.lede a { color: var(--amber); }
.review { border: 1px solid color-mix(in srgb, var(--amber) 35%, transparent); background: color-mix(in srgb, var(--amber) 7%, transparent); border-left: 3px solid var(--amber); border-radius: 8px;
  padding: 10px 14px; font-size: 13.5px; color: var(--soft); line-height: 1.5; margin-bottom: 22px; }
.review b { color: var(--amber); font-weight: 500; }

.doc { font-size: 16px; line-height: 1.68; color: var(--mb-text); overflow-wrap: break-word; }
.doc h2 { font-size: 24px; letter-spacing: -0.3px; margin: 34px 0 10px; padding-top: 18px; border-top: 1px solid var(--line); line-height: 1.25; }
.doc h3 { font-size: 19px; margin: 26px 0 8px; line-height: 1.3; }
.doc h4 { font-size: 16px; margin: 20px 0 6px; color: var(--soft); }
.doc > :first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.doc p { margin: 0 0 14px; }
.doc a { color: var(--amber); text-decoration-color: color-mix(in srgb, var(--amber) 45%, transparent); text-underline-offset: 2px; }
.doc a:hover { text-decoration-color: var(--amber); }
.doc .wl-off { border-bottom: 1px dotted var(--dim); cursor: help; }
.doc ul, .doc ol { margin: 0 0 14px; padding-left: 24px; }
.doc li { margin: 3px 0; }
.doc li > ul, .doc li > ol { margin: 4px 0; }
.doc li.task { list-style: none; margin-left: -20px; }
.doc .box { font-size: 15px; color: var(--dim); }
.doc code { font-size: 13.5px; background: var(--mb-surface-sunken); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
.doc pre { background: var(--card2); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; margin: 0 0 16px; line-height: 1.5; }
.doc pre code { background: none; border: 0; padding: 0; font-size: 13px; }
.doc blockquote { margin: 0 0 16px; padding: 4px 0 4px 16px; border-left: 3px solid var(--line); color: var(--soft); }
.doc blockquote p:last-child { margin-bottom: 0; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 26px 0; }
.doc mark { background: color-mix(in srgb, var(--mb-amber-fill) 35%, transparent); color: var(--ink); padding: 0 2px; }
.tbl { overflow-x: auto; margin: 0 0 18px; border: 1px solid var(--line); border-radius: 8px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.5; }
.doc th { text-align: left; background: var(--card); font-weight: 500; color: var(--soft); }
.doc th, .doc td { padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc tr:last-child td { border-bottom: 0; }
.doc td + td, .doc th + th { border-left: 1px solid var(--line); }
.panel { border-radius: 8px; padding: 10px 14px 10px 14px; margin: 0 0 16px; border: 1px solid; border-left-width: 3px; font-size: 15px; }
.panel p:last-child, .panel ul:last-child { margin-bottom: 0; }
.panel-title { font-weight: 700; margin-bottom: 4px; }
.panel-info { border-color: color-mix(in srgb, var(--mb-info) 40%, transparent); background: color-mix(in srgb, var(--mb-info) 7%, transparent); border-left-color: var(--mb-info); }
.panel-note { border-color: color-mix(in srgb, var(--mb-note) 40%, transparent); background: color-mix(in srgb, var(--mb-note) 7%, transparent); border-left-color: var(--mb-note); }
.panel-tip { border-color: color-mix(in srgb, var(--mb-ok) 40%, transparent); background: color-mix(in srgb, var(--mb-ok) 7%, transparent); border-left-color: var(--mb-ok); }
.panel-warning { border-color: color-mix(in srgb, var(--mb-warn) 40%, transparent); background: color-mix(in srgb, var(--mb-warn) 7%, transparent); border-left-color: var(--mb-warn); }
.panel-quote { border-color: var(--line); background: var(--card2); border-left-color: var(--dim); }

/* after the body */
.children h2, .backlinks h2, .home-recent h2 { font-size: 13px; font-family: var(--mb-font-mono); letter-spacing: 2.5px; text-transform: uppercase; color: var(--dim); font-weight: 400; margin: 0 0 10px; }
.children, .backlinks, .home-recent { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); }
.children ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.children li { background: var(--card); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; }
.children li:hover { border-color: var(--amber); }
.children a { text-decoration: none; font-weight: 500; display: block; margin-bottom: 3px; }
.children span { font-size: 13px; color: var(--dim); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.labels { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 24px; }
.labels a { font: 12px var(--mb-font-mono); color: var(--soft); text-decoration: none; background: var(--card); border: 1px solid var(--line);
  border-radius: 999px; padding: 2px 10px; }
.labels a::before { content: '#'; color: var(--dim); }
.labels a:hover { border-color: var(--amber); color: var(--amber); }
.backlinks ul, .recent { list-style: none; margin: 0; padding: 0; }
.backlinks li, .recent li { display: flex; align-items: baseline; gap: 10px; padding: 6px 0; border-top: 1px solid var(--line); font-size: 14.5px; }
.backlinks li:first-child, .recent li:first-child { border-top: 0; }
.backlinks a, .recent a { text-decoration: none; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.backlinks a:hover, .recent a:hover { color: var(--amber); }
.backlinks .mono, .recent .mono { margin-left: auto; color: var(--dim); font-size: 12px; white-space: nowrap; }

/* on this page */
.toc { position: sticky; top: var(--ib-h, 54px); align-self: start; padding: 26px 0 30px; max-height: calc(100vh - var(--ib-h, 54px)); overflow: auto; font-size: 13px; }
.toc-h { font: 11px var(--mb-font-mono); letter-spacing: 2px; text-transform: uppercase; color: var(--dim); margin-bottom: 8px; }
.toc ul { list-style: none; margin: 0; padding: 0 0 0 10px; border-left: 1px solid var(--line); }
.toc li { margin: 4px 0; }
.toc li.l3 { padding-left: 12px; }
.toc a { text-decoration: none; color: var(--dim); line-height: 1.35; display: block; }
.toc a:hover, .toc a.on { color: var(--amber); }

/* space directory */
.spaces { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin: 22px 0 8px; }
.space-card { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 4px 12px; align-items: start; padding: 14px 16px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; text-decoration: none; }
.space-card:hover { border-color: var(--amber); }
.space-card b { font-size: 17px; font-weight: 500; align-self: center; }
.space-card .about { grid-column: 2; font-size: 13.5px; color: var(--soft); line-height: 1.45; }
.space-card .mono { grid-column: 2; font-size: 11.5px; color: var(--dim); margin-top: 4px; }

.page-note { margin: 28px 0 0; font: 12px var(--mb-font-mono); color: var(--dim); line-height: 1.8; }
.page-note a { color: var(--dim); }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 260px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 820px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 0 16px; }
  .side { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); padding: 12px 0; }
  .side details.side-wrap > summary { display: block; cursor: pointer; font: 12px var(--mb-font-mono); letter-spacing: 2px; text-transform: uppercase; color: var(--dim); padding: 4px 0; }
  .side details.side-wrap[open] > summary { margin-bottom: 12px; }
  .side details.side-wrap > summary::before { content: none; }
  h1 { font-size: 30px; }
  .doc { font-size: 15.5px; }
}

/* review state in the byline */
.byline .rv.no { color: var(--amber); }
.byline .rv.late { color: var(--fold); }
.byline .adr-st { border: 1px solid var(--line); border-radius: 5px; padding: 0 6px; text-transform: uppercase; letter-spacing: 1px; font-size: 11px; }
.byline .adr-st.accepted { color: var(--pass); border-color: color-mix(in srgb, var(--pass) 45%, transparent); }
.byline .adr-st.proposed { color: var(--violet); border-color: color-mix(in srgb, var(--violet) 45%, transparent); }
.byline .adr-st.superseded { color: var(--dim); text-decoration: line-through; }