/* Genera on Bare Metal: the shared style of every page of the site. */
:root {
  --bg: #f7f5f0; --fg: #1d1d1b; --muted: #5e5b55; --rule: #d9d4c9;
  --accent: #8a2c1d; --box: #ffffff; --box2: #efe9dd;
  --done: #2f6b3a; --active: #a0560f;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413; --fg: #e9e6df; --muted: #a39f96; --rule: #34322e;
    --accent: #e0846f; --box: #1d1c1a; --box2: #26241f;
    --done: #8cc78f; --active: #e8b35f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.55 "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}
main { max-width: 860px; margin: 0 auto; padding: 28px 24px 64px; }

/* The menu at the top of every page */
nav.menu {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 22px;
  padding-bottom: 12px; margin-bottom: 26px; border-bottom: 1px solid var(--rule);
  font: 600 12px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase;
}
nav.menu .site { color: var(--fg); text-decoration: none; margin-right: auto; letter-spacing: .06em; }
nav.menu a { color: var(--muted); text-decoration: none; }
nav.menu a:hover, nav.menu a:focus-visible { color: var(--accent); }
nav.menu a[aria-current="page"] { color: var(--accent); }

header { border-bottom: 2px solid var(--fg); padding-bottom: 20px; margin-bottom: 28px; }
.kicker {
  font: 600 12px/1 var(--mono);
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent);
}
.kicker a { color: inherit; text-decoration: none; }
h1 { font-size: 44px; line-height: 1.08; margin: 10px 0 12px; letter-spacing: -.01em; }
.lede { font-size: 19px; color: var(--muted); margin: 0; max-width: 680px; }
h2 {
  font: 600 13px/1 var(--mono);
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
  margin: 36px 0 14px;
}
h3 { font-size: 20px; line-height: 1.25; margin: 26px 0 8px; }
p { margin: 0 0 12px; }
a { color: var(--accent); }
.note { font-size: 13px; color: var(--muted); }

/* Mission: the processors */
.cores { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 6px 0 10px; }
.core { background: var(--box); border: 1px solid var(--rule); border-radius: 6px; padding: 10px 12px; }
.core b { display: block; font-size: 15px; }
.core span { display: block; font-size: 13px; color: var(--muted); line-height: 1.4; margin-top: 2px; }
.core.emu { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.core small { font: 11px/1 var(--mono); color: var(--muted); letter-spacing: .06em; }

/* Mission: highlights */
.points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.points div { border-top: 1px solid var(--rule); padding-top: 10px; }
.points b { display: block; margin-bottom: 2px; }
.points span { color: var(--muted); font-size: 15px; }

/* Road map: the steps and their states */
ol.road { list-style: none; padding: 0; margin: 0; counter-reset: s; }
ol.road li {
  counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 10px;
  padding: 12px 0; border-top: 1px solid var(--rule);
}
ol.road li::before {
  content: counter(s); font: 600 13px/1.9 var(--mono); color: var(--muted);
}
ol.road li.done::before { content: counter(s) " ✓"; color: var(--done); }
ol.road li.active::before { color: var(--active); }
ol.road li.active { box-shadow: inset 3px 0 0 var(--active); padding-left: 13px; margin-left: -13px; }
ol.road p { margin: 0; }
ol.road .step b { font-weight: 600; font-size: 17px; }
ol.road li.todo .step b { color: var(--muted); }
ol.road .about { color: var(--muted); }
ol.road .progress, ol.road .docs { font-size: 15px; margin-top: 4px; }
ol.road .progress span, ol.road .docs span {
  font: 600 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}
.state {
  display: inline-block; vertical-align: 2px; margin-left: 6px; padding: 3px 7px 2px;
  border: 1px solid currentColor; border-radius: 3px;
  font: 600 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
}
.state.done, li.done .state { color: var(--done); }
.state.active, li.active .state { color: var(--active); background: var(--box2); }
.state.todo, li.todo .state { color: var(--muted); border-style: dashed; }
.legend { margin: -8px 0 14px; }
.legend .state { margin: 0 8px 0 0; }
.mvp { background: var(--box2); border-radius: 6px; padding: 14px 16px; margin-top: 4px; }

/* Screenshots: scaled, linking to the full-resolution original */
figure { margin: 16px 0 8px; }
figure img { width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 4px; display: block; }
figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }
figure a { display: block; cursor: zoom-in; }
figure a:hover img, figure a:focus-visible img { border-color: var(--accent); }

/* Time stamps */
.stamp {
  font: 600 12px/1 var(--mono);
  letter-spacing: .08em; color: var(--accent); margin: 0 0 12px;
}
header .stamp { margin: 0; }

/* Status: the list of entries, on the index and the title page */
ol.entries { list-style: none; padding: 0; margin: 0; }
ol.entries li { border-top: 1px solid var(--rule); padding: 12px 0; }
ol.entries li:first-child { border-top: 0; padding-top: 0; }
.entries time, .latest time {
  display: block; font: 600 12px/1.4 var(--mono); letter-spacing: .08em; color: var(--accent);
}
.entries a, .latest a.title { font-size: 19px; font-weight: 600; text-decoration: none; color: var(--fg); }
.entries a:hover, .entries a:focus-visible, .latest a.title:hover, .latest a.title:focus-visible {
  color: var(--accent); text-decoration: underline;
}
.entries span, .latest .teaser { display: block; color: var(--muted); font-size: 15px; margin: 2px 0 0; }
.latest { background: var(--box2); border-radius: 6px; padding: 14px 16px; }
.latest .more { font-size: 15px; margin: 8px 0 0; }

/* Status entry: previous / next */
nav.pager {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: start;
  margin-top: 36px; padding-top: 14px; border-top: 1px solid var(--rule); font-size: 15px;
}
nav.pager .next { text-align: right; }
nav.pager .all { font: 600 12px/1.9 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
nav.pager small {
  display: block; font: 600 11px/1.6 var(--mono); letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted);
}
nav.pager a { text-decoration: none; }
nav.pager a:hover, nav.pager a:focus-visible { text-decoration: underline; }

/* Timeline */
ol.timeline { list-style: none; padding: 0; margin: 0; }
ol.timeline li {
  display: grid; grid-template-columns: 92px 1fr; gap: 14px;
  padding: 9px 0; border-top: 1px solid var(--rule);
}
ol.timeline li > b {
  font: 600 13px/1.75 var(--mono); color: var(--accent); letter-spacing: .04em;
}
ol.timeline li span { display: block; }
ol.timeline li.era > b { text-decoration: underline; text-underline-offset: 3px; }
ol.sources { padding-left: 22px; font-size: 14px; color: var(--muted); }
ol.sources li { margin: 0 0 4px; }
ol.sources a { word-break: break-word; }
sup.ref { font: 10px/1 var(--mono); }
sup.ref a { text-decoration: none; }

.links { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; margin-top: 30px; }
.links a { display: block; border-top: 1px solid var(--rule); padding-top: 10px; text-decoration: none; }
.links a b { display: block; font-size: 18px; }
.links a span { display: block; color: var(--muted); font-size: 15px; }
.links a:hover b, .links a:focus-visible b { text-decoration: underline; }

footer {
  margin-top: 40px; padding-top: 14px; border-top: 1px solid var(--rule);
  font-size: 13px; color: var(--muted);
}
@media (max-width: 640px) {
  h1 { font-size: 34px; }
  .cores { grid-template-columns: 1fr 1fr; }
  .points, .links { grid-template-columns: 1fr; }
  ol.timeline li { grid-template-columns: 1fr; gap: 0; }
  nav.pager { grid-template-columns: 1fr 1fr; }
  nav.pager .all { grid-column: 1 / -1; grid-row: 2; }
}