:root {
  --paper: #fff;
  --ink: #242424;
  --muted: #666;
  --faint: #aaa;
  --rule: #ddd;
  --rule-light: #ececec;
  --blue: #245b9b;
  --blue-light: #b9cbe0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 Charter, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

button { font-family: inherit; }

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding-bottom: 72px;
}

header { padding: 42px 0 24px; }
.header-line { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; }
h1 { margin: 0; font-size: 32px; font-weight: 500; letter-spacing: -.02em; }
.sub { margin: 4px 0 0; color: var(--muted); }
.repo-link {
  color: var(--muted);
  font: 13px/1.4 ui-sans-serif, system-ui, sans-serif;
  text-decoration: none;
}
.repo-link:hover { color: var(--ink); text-decoration: underline; }

.hero { margin: 0 0 28px; }
.hero h2 { margin: 0 0 6px; font-size: 16px; font-weight: 500; }
#plot { display: block; width: 100%; height: auto; }
.plot-tip {
  position: fixed;
  z-index: 10;
  padding: 4px 8px;
  border: 1px solid #444;
  background: var(--paper);
  color: var(--ink);
  font: 13px/1.4 ui-sans-serif, system-ui, sans-serif;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
}

.tabs {
  display: flex;
  gap: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}

.tab {
  margin-bottom: -1px;
  padding: 9px 0;
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
}

.tab:hover { color: var(--ink); }
.tab.active { border-bottom-color: var(--ink); color: var(--ink); }
.panel { display: none; }
.panel.active { display: block; }

.hist { max-width: 760px; }
.hist > p:first-child { margin-top: 0; font-size: 19px; }
.hist .note { color: var(--muted); font-size: 14px; }
.chronology { width: 100%; margin: 26px 0 18px; border-collapse: collapse; }
.chronology th,
.chronology td { padding: 8px 10px 8px 0; border-bottom: 1px solid var(--rule-light); text-align: left; }
.chronology th { width: 120px; font-weight: 400; color: var(--muted); }
.chronology td:nth-child(2) { width: 180px; }

.builder {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.cons-list { border-top: 1px solid var(--rule); }
.cons-card {
  display: block;
  width: 100%;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid var(--rule-light);
  background: none;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.cons-card:hover .t { color: var(--blue); }
.cons-card.sel .t { color: var(--blue); }
.cons-card.sel { box-shadow: inset 2px 0 var(--blue); padding-left: 10px; }
.cons-card .t { font-size: 15px; }
.cons-card .m {
  margin-top: 1px;
  color: var(--muted);
  font: 12px/1.4 ui-sans-serif, system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
}

.stage { min-width: 0; }
.stage-head { margin-bottom: 10px; }
.stage-head .name { font-size: 21px; }
.stage-head .meta { margin-top: 2px; color: var(--muted); font-size: 14px; }
.stage svg {
  display: block;
  width: 100%;
  height: auto;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.btn {
  padding: 5px 11px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--ink); }
.btn:disabled { opacity: .35; cursor: default; }
.stepno {
  margin-left: 4px;
  color: var(--muted);
  font: 13px/1.4 ui-sans-serif, system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
}

.caption { margin-top: 14px; min-height: 48px; }
.caption b { font-weight: 500; }
.caption .cost { color: var(--muted); font-size: 14px; white-space: nowrap; }
.readout {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--rule-light);
  font: 13px/1.4 ui-sans-serif, system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
}
.readout .k { color: var(--muted); }
.readout .v { color: var(--ink); }
.notes { display: none; }

@media (max-width: 760px) {
  .wrap { width: min(calc(100% - 28px), 1120px); }
  header { padding-top: 28px; }
  .builder { grid-template-columns: 1fr; gap: 24px; }
  .cons-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }
  .chronology th { width: 96px; }
  .chronology td:nth-child(2) { width: auto; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  .header-line { align-items: center; }
  .tabs { gap: 18px; }
  .cons-list { grid-template-columns: 1fr; }
  .chronology td:nth-child(3) { text-align: right; }
}