/* Articles on semantechs.co.uk. Palette and top bar follow the SemOps Manual
   (manual.css): ink #14243A, accent orange #FD5B1C, teal links. Body text is
   set in a serif for long reading; no web fonts, no third-party requests. */
:root {
  --paper: #ffffff; --paper-2: #f6f7f9; --paper-3: #eceef2;
  --ink: #14243A; --ink-2: #3c4a5e; --ink-3: #6b7686;
  --rule: #dde1e7;
  --accent: #FD5B1C; --accent-soft: #FFE6DA;
  --link: #0a6f85;
  --code-bg: #f3f5f8;
  --sans: "Segoe UI", system-ui, -apple-system, Helvetica, Arial, sans-serif;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --mono: "Cascadia Mono", Consolas, "Ubuntu Mono", ui-monospace, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #11161e; --paper-2: #171d27; --paper-3: #212936;
    --ink: #e6e9ee; --ink-2: #b8c0cc; --ink-3: #8993a2;
    --rule: #2c3543;
    --accent: #ff7a45; --accent-soft: #3a1d10;
    --link: #5fd0e6;
    --code-bg: #1b222d;
  }
}
:root[data-theme="dark"] {
  --paper: #11161e; --paper-2: #171d27; --paper-3: #212936;
  --ink: #e6e9ee; --ink-2: #b8c0cc; --ink-3: #8993a2;
  --rule: #2c3543;
  --accent: #ff7a45; --accent-soft: #3a1d10;
  --link: #5fd0e6;
  --code-bg: #1b222d;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 64px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.6; }
a { color: var(--link); text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------------------------------------------------------------- top bar */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 20px;
  padding: 10px 24px; background: #14243A; color: #fff;
  border-bottom: 3px solid var(--accent);
}
.topbar a { color: #fff; text-decoration: none; }
.topbar a:hover { text-decoration: underline; }
.topbar .home { font-size: .85rem; opacity: .85; white-space: nowrap; }
.topbar .title { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.topbar .title img { border-radius: 4px; background: #fff; }
.topbar .links { margin-left: auto; display: flex; gap: 18px; font-size: .85rem; }

/* ---------------------------------------------------------------- page */
.page { max-width: 44rem; margin: 0 auto; padding: 44px 24px 64px; }

.meta { margin: 0; font-size: .86rem; color: var(--ink-3); }
.meta a { color: inherit; }

/* ---------------------------------------------------------------- article header */
.article-head { margin-bottom: 2.2rem; padding-bottom: 1.6rem; border-bottom: 1px solid var(--rule); }
.kicker { margin: 0 0 .7rem; font-size: .74rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.article-head h1 { margin: 0 0 .35rem; font-family: var(--serif); font-size: 2.6rem; line-height: 1.12; letter-spacing: -.01em; }
.article-head .subtitle { margin: 0 0 1.1rem; font-family: var(--serif); font-size: 1.4rem; line-height: 1.3; color: var(--ink-2); }

/* ---------------------------------------------------------------- prose */
.prose { font-family: var(--serif); font-size: 1.15rem; line-height: 1.72; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: .35em 0; }
.prose li > ul, .prose li > ol { margin: .35em 0; }
.prose h2 { font-family: var(--sans); font-size: 1.32rem; line-height: 1.3; margin: 2.3em 0 .7em; }
.prose h3 { font-family: var(--sans); font-size: 1.08rem; margin: 1.8em 0 .5em; }
.prose strong { font-weight: 700; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.4em 0; }
.prose img { max-width: 100%; height: auto; }
.prose figure { margin: 1.6em 0; }
.prose figcaption { font-family: var(--sans); font-size: .85rem; color: var(--ink-3); margin-top: .4em; }

/* Quotations. A run of quoted lines, such as a set of RDF triples, reads as one block. */
.prose blockquote {
  margin: 1.4em 0; padding: .55em 1.1em;
  border-left: 4px solid var(--accent); background: var(--paper-2);
  font-family: var(--sans); font-size: 1rem; line-height: 1.55; color: var(--ink-2);
}
.prose blockquote p { margin: .25em 0; }
.prose blockquote + blockquote { margin-top: -1.4em; padding-top: 0; }

/* A bare address in the text is shown as the site's name, like a citation. */
.prose a.src {
  font-family: var(--sans); font-size: .78em; color: var(--ink-3);
  text-decoration: none; border-bottom: 1px dotted currentColor; white-space: nowrap;
}
.prose a.src:hover { color: var(--link); border-bottom-style: solid; }

code { font-family: var(--mono); font-size: .86em; background: var(--code-bg); padding: .1em .3em; border-radius: 3px; }
pre { background: var(--code-bg); border: 1px solid var(--rule); border-radius: 6px; padding: 14px 16px; overflow-x: auto; line-height: 1.5; }
pre code { background: none; padding: 0; font-size: .82rem; }

.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; margin: 1.4em 0; font-family: var(--sans); font-size: .9rem; line-height: 1.45; }
.prose th, .prose td { border: 1px solid var(--rule); padding: 7px 10px; text-align: left; vertical-align: top; }
.prose th { background: var(--paper-2); }

.prose .footnotes { font-size: .92rem; color: var(--ink-2); }

/* ---------------------------------------------------------------- list and cards */
.list-head { margin-bottom: 2rem; padding-bottom: 1.2rem; border-bottom: 1px solid var(--rule); }
.list-head h1 { margin: 0 0 .5rem; font-family: var(--serif); font-size: 2.6rem; line-height: 1.12; }
.list-head p { margin: 0; color: var(--ink-2); }

.card {
  display: block; margin: 0 0 18px; padding: 18px 22px;
  border: 1px solid var(--rule); border-left: 4px solid var(--accent); border-radius: 6px;
  color: var(--ink); text-decoration: none;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.card:hover, .card:focus-visible { border-color: var(--accent); box-shadow: 0 6px 18px rgba(20, 36, 58, .12); transform: translateY(-2px); }
.card .meta { font-size: .8rem; }
.card h2 { margin: .35rem 0 .1rem; font-family: var(--serif); font-size: 1.5rem; line-height: 1.2; color: var(--ink); }
.card .subtitle { margin: 0 0 .5rem; font-family: var(--serif); font-size: 1.08rem; color: var(--ink-2); }
.card .summary { margin: 0; color: var(--ink-2); font-size: .98rem; }

.more { margin-top: 3.2rem; padding-top: 1.6rem; border-top: 1px solid var(--rule); }
.more > h2 { margin: 0 0 1rem; font-size: .76rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.more .card h2 { font-size: 1.25rem; }

/* ---------------------------------------------------------------- footer */
.foot { border-top: 1px solid var(--rule); padding: 18px 24px; text-align: center; font-size: .8rem; color: var(--ink-3); }
.foot p { margin: 0; }
.foot a { color: inherit; }

/* ---------------------------------------------------------------- narrow screens */
@media (max-width: 700px) {
  .topbar { padding: 10px 16px; gap: 12px; flex-wrap: wrap; }
  .topbar .links { gap: 12px; }
  .page { padding: 28px 16px 48px; }
  .article-head h1, .list-head h1 { font-size: 2rem; }
  .article-head .subtitle { font-size: 1.2rem; }
  .prose { font-size: 1.07rem; }
}

/* ---------------------------------------------------------------- print */
@media print {
  .topbar, .more, .foot { display: none; }
  body { font-size: 11pt; }
  .page { max-width: none; padding: 0; }
  .prose a.src::after { content: " <" attr(title) ">"; word-break: break-all; }
}