:root {
  --bg: #f6f7f9; --card: #fff; --ink: #1d2433; --muted: #6b7385; --line: #e3e6ec;
  --accent: #2357c6; --neg: #b42318; --warn: #a15c00; --ok: #1f7a3d;
  --warn-bg: #fff4e0; --danger-bg: #fdecea; --info-bg: #e8f0fe;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12151b; --card: #1b2029; --ink: #e7eaf0; --muted: #9aa3b5; --line: #2c3340;
          --accent: #7aa2ff; --neg: #ff8a80; --warn: #ffb74d; --ok: #81c995;
          --warn-bg: #3a2c12; --danger-bg: #3d1d1a; --info-bg: #1c2a45; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--ink); }
header.top { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center; padding: .75rem 1rem;
  background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 650; }
nav { display: flex; flex-wrap: wrap; gap: .25rem .9rem; flex: 1; }
nav a { color: var(--muted); text-decoration: none; }
nav a.here, nav a:hover { color: var(--accent); }
.who { color: var(--muted); display: flex; gap: .6rem; align-items: center; }
main { max-width: 1100px; margin: 0 auto; padding: 1rem; }
footer { max-width: 1100px; margin: 1rem auto 2rem; padding: 0 1rem; color: var(--muted); font-size: .85rem; }
h1 { font-size: 1.5rem; margin: .25rem 0 .5rem; }
h2 { font-size: 1.1rem; margin: 0 0 .6rem; }
h3 { font-size: 1rem; margin: 1rem 0 .4rem; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1rem; margin: 0 0 1rem;
  overflow-x: auto; }
.card.narrow { max-width: 520px; margin: 2rem auto; }
.heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .5rem; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .75rem; margin-bottom: 1rem; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: .8rem 1rem; }
.tile span { display: block; color: var(--muted); font-size: .85rem; }
.tile strong { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.tile em { color: var(--muted); font-style: normal; font-size: .85rem; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: .35rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .85rem; }
table.compact { width: auto; margin-top: .5rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.neg { color: var(--neg); }
tr.past td { color: var(--muted); }
tr.sub td { color: var(--muted); font-size: .88rem; border-bottom-style: dashed; }
tr.here td { background: var(--info-bg); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.right { float: right; font-variant-numeric: tabular-nums; }
.tag { display: inline-block; padding: 0 .4rem; border-radius: 999px; font-size: .78rem; border: 1px solid var(--line); color: var(--muted); }
.tag.warn { color: var(--warn); border-color: var(--warn); }
.tag.ok { color: var(--ok); border-color: var(--ok); }
.alerts { margin-bottom: 1rem; }
.alert { margin: 0 0 .5rem; padding: .6rem .8rem; border-radius: 8px; border-left: 4px solid; }
.alert.danger { background: var(--danger-bg); border-color: var(--neg); }
.alert.warn { background: var(--warn-bg); border-color: var(--warn); }
.alert.info { background: var(--info-bg); border-color: var(--accent); }
.picker { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
select, button { font: inherit; padding: .3rem .5rem; border-radius: 6px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
.button { display: inline-block; background: var(--accent); color: #fff; padding: .55rem 1rem; border-radius: 8px; text-decoration: none; }
form.inline { display: inline; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; cursor: pointer; }
form.row { display: flex; gap: .6rem; align-items: center; margin: .4rem 0; }
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: .2rem 0; }
details { border-bottom: 1px solid var(--line); padding: .4rem 0; }
summary { cursor: pointer; font-weight: 550; }
.note { white-space: pre-wrap; padding: .5rem 0; }
svg.chart { width: 100%; height: auto; display: block; }
svg.chart .grid { stroke: var(--line); stroke-width: 1; }
svg.chart .zero { stroke: var(--muted); stroke-width: 1.2; stroke-dasharray: 4 3; }
svg.chart .axis { fill: var(--muted); font-size: 11px; }
svg.chart .line { fill: none; stroke-width: 2; }
svg.chart .line.combined { stroke: var(--accent); }
svg.chart .line.checking { stroke: var(--warn); stroke-dasharray: 5 3; }
svg.chart .low { stroke: var(--card); stroke-width: 1.5; }
svg.chart .low.combined { fill: var(--accent); }
svg.chart .low.checking { fill: var(--warn); }
.legend { color: var(--muted); font-size: .85rem; }
.key { display: inline-block; width: 18px; height: 3px; vertical-align: middle; margin: 0 .3rem 0 .6rem; }
.key.combined { background: var(--accent); }
.key.checking { background: var(--warn); }
@media (max-width: 640px) {
  main { padding: .6rem; }
  th, td { padding: .3rem .35rem; }
  .who { width: 100%; }
}