:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --series: #2a78d6;
  --series-wash: rgba(42, 120, 214, 0.1);
  --good: #006300;
  --bad: #d03b3b;
  --tooltip-bg: #ffffff;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --series: #3987e5;
    --series-wash: rgba(57, 135, 229, 0.12);
    --good: #0ca30c;
    --bad: #e66767;
    --tooltip-bg: #232322;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.1);
  --series: #3987e5;
  --series-wash: rgba(57, 135, 229, 0.12);
  --good: #0ca30c;
  --bad: #e66767;
  --tooltip-bg: #232322;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding: 24px 16px 48px;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  max-width: 960px;
  margin-inline: auto;
}
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 22px; }
h2 { font-size: 17px; }
a { color: inherit; }
p { margin: 0; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}
.sub { color: var(--ink-2); margin-top: 4px; font-size: 14px; }
.repo-link { color: var(--ink-2); font-size: 14px; text-decoration: none; padding-top: 4px; }
.repo-link:hover { color: var(--ink); text-decoration: underline; }

.filters {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filters button {
  font: inherit;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
}
.filters button:hover { color: var(--ink); }
.filters button[aria-checked="true"] {
  background: var(--ink);
  color: var(--page);
  border-color: var(--ink);
}

.loading, .empty { color: var(--ink-2); padding: 24px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 16px;
}
.card-meta { color: var(--ink-2); font-size: 14px; margin-top: 4px; }
.book-link { font-size: 13px; color: var(--ink-2); text-decoration: none; white-space: nowrap; padding-top: 3px; }
.book-link:hover { color: var(--ink); text-decoration: underline; }

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px 16px;
  margin-bottom: 8px;
}
.tile { padding: 10px 0; }
.tile .label { font-size: 12px; color: var(--ink-2); text-transform: none; }
.tile .value { font-size: 24px; font-weight: 600; line-height: 1.2; margin-top: 2px; }
.tile .value.small { font-size: 16px; font-weight: 600; }
.tile .note { font-size: 12px; color: var(--muted); margin-top: 2px; }
.delta { font-size: 13px; font-weight: 500; margin-left: 6px; }
.delta.down { color: var(--good); }
.delta.up { color: var(--bad); }
.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid currentColor;
  margin-top: 4px;
}
.badge.good { color: var(--good); }
.badge.neutral { color: var(--muted); }

.chart { margin: 8px 0 0; }
.chart-wrap { position: relative; }
.chart-svg { display: block; width: 100%; height: 260px; outline: none; }
.chart-svg:focus-visible { box-shadow: 0 0 0 2px var(--series); border-radius: 8px; }
.chart-svg text { font: 12px system-ui, -apple-system, "Segoe UI", sans-serif; fill: var(--muted); }
.chart-svg .tick { font-variant-numeric: tabular-nums; }
.chart-svg .grid { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.chart-svg .baseline { stroke: var(--baseline); stroke-width: 1; shape-rendering: crispEdges; }
.chart-svg .line { fill: none; stroke: var(--series); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart-svg .wash { fill: var(--series-wash); }
.chart-svg .dot { fill: var(--series); stroke: var(--surface); stroke-width: 2; }
.chart-svg .dot.low { fill: var(--surface); stroke: var(--series); stroke-width: 2; }
.chart-svg .alert-line { stroke: var(--muted); stroke-width: 1; shape-rendering: crispEdges; }
.chart-svg .label { fill: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.chart-svg .label.muted { fill: var(--ink-2); font-weight: 500; }
.chart-svg .crosshair { stroke: var(--baseline); stroke-width: 1; shape-rendering: crispEdges; }
.chart-svg .hit { fill: transparent; cursor: crosshair; }
.chart-caption { font-size: 12px; color: var(--muted); margin-top: 6px; }
.chart-empty { color: var(--ink-2); font-size: 14px; padding: 48px 0; text-align: center; }
.chart.is-empty .chart-svg { height: 120px; }
.chart.is-empty .chart-empty { padding: 40px 0; }

.tooltip {
  position: absolute;
  top: 8px;
  pointer-events: none;
  background: var(--tooltip-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  min-width: 160px;
  z-index: 1;
}
.tooltip .tt-value { font-weight: 600; font-size: 15px; }
.tooltip .tt-row { color: var(--ink-2); margin-top: 2px; }
.tooltip .tt-row::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 2px;
  background: var(--series);
  vertical-align: middle;
  margin-right: 6px;
  border-radius: 1px;
}
.tooltip .tt-row.plain::before { display: none; }

.readings { margin-top: 12px; border-top: 1px solid var(--border); padding-top: 10px; }
.readings summary { cursor: pointer; font-size: 14px; color: var(--ink-2); }
.readings summary:hover { color: var(--ink); }
.table-wrap { overflow-x: auto; margin-top: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th { color: var(--ink-2); font-weight: 500; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.soldout { color: var(--muted); }

.page-footer { color: var(--muted); font-size: 13px; margin-top: 24px; }

@media (max-width: 600px) {
  .card { padding: 16px; }
  .tile .value { font-size: 20px; }
  .chart-svg { height: 220px; }
  .card-head, .page-header { flex-direction: column; gap: 6px; }
}
@media (prefers-reduced-motion: no-preference) {
  .filters button, .book-link, .repo-link { transition: color 120ms, background 120ms; }
}