/* Baseline route histories. Graph-paper instrument log: cool paper, cobalt ink for
   measured points, amber for age warnings, hatching for time nobody measured. */
:root {
  --paper: #eef1f4;
  --panel: #f8fafb;
  --ink: #1b2430;
  --muted: #56647a;
  --grid: #c9d2dc;
  --signal: #2f5bd3;
  --amber: #9a5800;
  --hatch: #8f9baa;
  --display: "Bahnschrift", "DIN Alternate", "Arial Narrow", system-ui, sans-serif;
  --body: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --mono: "Cascadia Mono", ui-monospace, "SF Mono", Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10151b;
    --panel: #161d25;
    --ink: #dce3ea;
    --muted: #97a4b3;
    --grid: #2b3541;
    --signal: #88a8ff;
    --amber: #e3a24c;
    --hatch: #5b6774;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  background-attachment: fixed;
  color: var(--ink);
  font: 16px/1.55 var(--body);
  padding: 0 clamp(16px, 4vw, 48px) 64px;
}
@media (prefers-color-scheme: dark) { body { background-image: none; } }
main, .masthead { max-width: 1080px; margin: 0 auto; }
a { color: var(--signal); text-underline-offset: 2px; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--panel); padding: 8px 12px; z-index: 2; }

/* Type */
.brand, h1, h2, h3, .label-title {
  font-family: var(--display);
  font-stretch: 80%;
  letter-spacing: 0.01em;
}
.masthead {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline;
  gap: 4px 24px; padding: 20px 0 12px; border-bottom: 2px solid var(--ink);
}
.brand { margin: 0; font-size: 1.35rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; }
.masthead-note { margin: 0; color: var(--muted); font-size: 0.9rem; }
h1 { font-size: clamp(2rem, 5.5vw, 3.6rem); line-height: 1.02; font-weight: 600; margin: 40px 0 16px; max-width: 18ch; }
h1 .live { color: var(--amber); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 600; margin: 0 0 8px; }
h3 { font-size: 1.15rem; font-weight: 600; margin: 24px 0 8px; }
.lede { max-width: 62ch; font-size: 1.08rem; margin: 0 0 24px; }
.muted { color: var(--muted); }
.mono, code { font-family: var(--mono); font-size: 0.92em; }
p { max-width: 70ch; }

/* Standing notice: what this page is not */
.notice {
  border: 2px solid var(--ink); background: var(--panel);
  padding: 12px 16px; margin: 0 0 32px; max-width: 70ch;
}
.notice strong { font-family: var(--display); font-stretch: 80%; text-transform: uppercase; letter-spacing: 0.06em; }

/* Specimen labels: one per route */
.labels { list-style: none; padding: 0; margin: 0 0 48px; display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.label {
  background: var(--panel); border: 1px solid var(--ink); border-left: 8px solid var(--amber);
  padding: 12px 16px 14px;
}
.label[data-status="recent"] { border-left-color: var(--signal); }
.label-title { font-size: 1.3rem; font-weight: 600; margin: 0 0 6px; overflow-wrap: anywhere; }
.label-title a { color: inherit; }
.fields { display: grid; grid-template-columns: max-content 1fr; gap: 2px 12px; margin: 0; font-size: 0.93rem; }
.fields dt { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding-top: 2px; }
.fields dd { margin: 0; overflow-wrap: anywhere; }

.badge {
  display: inline-block; font-family: var(--mono); font-size: 0.74rem; text-transform: uppercase;
  letter-spacing: 0.06em; padding: 1px 6px; border: 1px solid currentColor; margin-left: 6px; vertical-align: 1px;
}
.badge[data-status="stale"], .badge[data-status="aging"] { color: var(--amber); }
.badge[data-status="recent"] { color: var(--signal); }

/* Route sections */
.route { border-top: 2px solid var(--ink); padding-top: 24px; margin-top: 48px; }
.route-head { display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: baseline; }
.route-head h2 { font-family: var(--mono); font-stretch: normal; font-size: clamp(1.2rem, 3vw, 1.7rem); letter-spacing: 0; overflow-wrap: anywhere; }
.panel { background: var(--panel); border: 1px solid var(--grid); padding: 16px; margin: 16px 0; }
.fresh { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); margin: 0; }
.fresh div { border-top: 1px solid var(--grid); padding-top: 8px; }
.fresh dt { font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.fresh dd { margin: 2px 0 0; }
.fresh .big { font-family: var(--display); font-stretch: 80%; font-size: 1.45rem; font-weight: 600; display: block; line-height: 1.2; }

/* Chart */
.chart-scroll { overflow-x: auto; margin: 16px 0 4px; background: var(--panel); border: 1px solid var(--grid); }
.chart { display: block; width: 100%; min-width: 640px; height: auto; }
.chart text { font-family: var(--mono); font-size: 11px; fill: var(--muted); }
.chart .axis { stroke: var(--ink); stroke-width: 1; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .break { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 4; }
.chart .point { fill: var(--signal); stroke: var(--panel); stroke-width: 2; }
.chart .value { fill: var(--ink); font-size: 12px; }
.chart .letter { fill: var(--ink); font-weight: 700; }
.chart .today { stroke: var(--amber); stroke-width: 2; }
.chart .today-label, .chart .gap-label { fill: var(--amber); }
.chart .hatch-line { stroke: var(--hatch); stroke-width: 1.5; }
.chart-caption { font-size: 0.88rem; color: var(--muted); margin: 0 0 16px; }

/* Observations table; becomes cards on narrow screens */
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; background: var(--panel); }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
th { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 600; }
td.num { font-family: var(--mono); white-space: nowrap; }
.letter-chip { font-family: var(--mono); font-weight: 700; display: inline-block; min-width: 1.8em; text-align: center; border: 1px solid var(--ink); justify-self: start; }
.scroll-hint { display: none; font-size: 0.85rem; color: var(--muted); margin: 8px 0 -8px; }
@media (max-width: 720px) {
  table, thead, tbody, tr, td { display: block; width: 100%; }
  thead { position: absolute; left: -9999px; }
  tr { border: 1px solid var(--grid); margin-bottom: 10px; padding: 6px 0; }
  td { border: 0; padding: 3px 12px; display: grid; grid-template-columns: 9.5em 1fr; gap: 8px; }
  td::before { content: attr(data-label); font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding-top: 3px; }
  td.num { white-space: normal; }
  .scroll-hint { display: block; }
}

.breaks { padding-left: 1.2em; margin: 8px 0 0; }
.breaks li { margin-bottom: 6px; overflow-wrap: anywhere; }
.breaks .change { font-family: var(--mono); font-size: 0.85em; }

/* Sources, methods, log */
.section { border-top: 2px solid var(--ink); margin-top: 56px; padding-top: 24px; }
.source { margin-bottom: 20px; }
.log { font-size: 0.88rem; }
.log td { font-family: var(--mono); font-size: 0.82rem; }
details summary { cursor: pointer; font-family: var(--display); font-stretch: 80%; font-size: 1.1rem; font-weight: 600; }
.superseded { color: var(--muted); text-decoration: line-through; }
footer { max-width: 1080px; margin: 56px auto 0; padding-top: 12px; border-top: 1px solid var(--grid); color: var(--muted); font-size: 0.85rem; }

@media (prefers-reduced-motion: no-preference) {
  .chart .point { transition: r 120ms ease-out; }
  .chart .point:hover { r: 8; }
}