:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --surface: #fcfcfb;
  --border: #e2e1dc;
  --text: #0b0b0b;
  --text-2: #52514e;
  --text-3: #7a7974;
  --grid: #ecebe7;
  --accent: #2a78d6;
  --fix: #2a78d6;
  --orig: #c4622d;
  --good: #1b7f55;
  --bad: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #121211;
    --surface: #1a1a19;
    --border: #2f2f2c;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --text-3: #93928a;
    --grid: #262624;
    --accent: #3987e5;
    --fix: #3987e5;
    --orig: #e07a45;
    --good: #4cc38a;
    --bad: #f07470;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121211;
  --surface: #1a1a19;
  --border: #2f2f2c;
  --text: #ffffff;
  --text-2: #c3c2b7;
  --text-3: #93928a;
  --grid: #262624;
  --accent: #3987e5;
  --fix: #3987e5;
  --orig: #e07a45;
  --good: #4cc38a;
  --bad: #f07470;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0 0 0.25rem; letter-spacing: -0.01em; }
h2 { font-size: 1rem; margin: 0; }

.top { max-width: 1200px; margin: 0 auto; padding: 24px 16px 8px; }
.lede { margin: 0; color: var(--text-2); max-width: 70ch; }

.layout {
  max-width: 1200px; margin: 0 auto; padding: 16px;
  display: grid; grid-template-columns: 320px minmax(0, 1fr); gap: 20px; align-items: start;
}
@media (max-width: 820px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}

.controls {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; position: sticky; top: 12px;
}
@media (max-width: 820px) { .controls { position: static; } }
.field { margin-bottom: 14px; }
.field > label, .field-label { display: block; font-weight: 600; margin-bottom: 4px; }
select {
  width: 100%; font: inherit; padding: 6px 8px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button {
  font: inherit; font-size: 0.82rem; padding: 3px 10px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.chips button:hover { border-color: var(--accent); }
.chips button[aria-pressed="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }

fieldset { border: 0; border-top: 1px solid var(--border); margin: 0; padding: 12px 0 2px; }
legend { font-weight: 600; padding: 0 0 4px; }
.slider { margin-bottom: 12px; }
.slider .row { display: flex; justify-content: space-between; gap: 8px; }
.slider label { font-size: 0.92rem; }
.slider output { font-variant-numeric: tabular-nums; font-weight: 600; }
.slider input[type="range"] { width: 100%; accent-color: var(--accent); margin: 2px 0 0; }
.slider .hint, .field .hint { font-size: 0.78rem; color: var(--text-3); }

.results { min-width: 0; }
.status {
  font-size: 0.9rem; color: var(--text-2); margin-bottom: 10px; min-height: 1.5em;
  display: flex; align-items: center; gap: 8px;
}
.status.error { color: var(--bad); }
.status .spin {
  width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--border);
  border-top-color: var(--accent); animation: spin 0.8s linear infinite; flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
@media (max-width: 520px) { .stats { grid-template-columns: minmax(0, 1fr); } }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; }
.stat .label { font-size: 0.82rem; color: var(--text-2); }
.stat .value { font-size: 1.5rem; font-weight: 650; font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat .delta { font-size: 0.82rem; color: var(--text-2); font-variant-numeric: tabular-nums; }

.chart {
  margin: 0 0 14px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
}
.chart figcaption { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; }
.legend { font-size: 0.82rem; color: var(--text-2); display: flex; align-items: center; gap: 6px; }
.key { display: inline-block; width: 18px; height: 0; border-top: 2px solid var(--fix); margin-left: 6px; }
.key-orig { border-top: 2px dashed var(--orig); }
.plot { width: 100%; position: relative; }
.plot svg { display: block; width: 100%; height: auto; overflow: visible; }
.axis-note { margin: 4px 0 0; font-size: 0.78rem; color: var(--text-3); }
.results.busy .plot { opacity: 0.55; transition: opacity 0.2s; }

svg text { fill: var(--text-2); font-size: 11px; font-family: inherit; }
svg .tick line, svg .grid { stroke: var(--grid); }
svg .axis { stroke: var(--border); }
svg .row-label { fill: var(--text); font-size: 12px; font-weight: 600; }
svg .ms-label { font-size: 11px; font-weight: 600; }
svg .today { stroke: var(--text-3); stroke-dasharray: 2 3; }

.tooltip {
  position: fixed; z-index: 10; pointer-events: none; max-width: 260px;
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; font-size: 0.82rem; box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.tooltip .t-row { display: flex; justify-content: space-between; gap: 12px; font-variant-numeric: tabular-nums; }

.table-view { margin: 0 0 14px; }
.table-view summary { cursor: pointer; color: var(--text-2); }
table { border-collapse: collapse; width: 100%; margin-top: 8px; font-variant-numeric: tabular-nums; font-size: 0.9rem; }
th, td { text-align: left; padding: 4px 8px; border-bottom: 1px solid var(--border); }

.notes { color: var(--text-2); font-size: 0.9rem; }
.notes h2 { color: var(--text); margin-top: 8px; }
.notes ul { padding-left: 1.2em; }

.warning {
  max-width: 1200px; margin: 8px auto 0; padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--bad); color: var(--text); background: var(--surface); font-size: 0.9rem;
}
textarea {
  width: 100%; min-height: 64px; font: 0.82rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
td.num, th.num { text-align: right; }
td.moved { color: var(--bad); font-weight: 600; }
.stat .pair { font-size: 0.82rem; color: var(--text-2); font-variant-numeric: tabular-nums; }