/* Layout: instrument panel. Controls left / readouts + comparison bars right; stacks to one column on narrow screens. */
:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --ink: #141a24;
  --ink-2: #4a5465;
  --ink-3: #7a8495;
  --rule: #dde2ea;
  --track: #e8ecf2;
  --bar: #b7c0ce;
  --accent: #2448c8;
  --accent-ink: #ffffff;
  --accent-soft: #e5ebfb;
  --good: #17734a;
  --good-soft: #e2f3ea;
  --warn: #a2470c;
  --warn-soft: #fbeadf;
  --f-display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-data: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f131a; --panel: #171c25; --ink: #e8ecf3; --ink-2: #a9b2c2; --ink-3: #7c8698;
    --rule: #283040; --track: #212836; --bar: #4a5468; --accent: #7f9cff; --accent-ink: #0f131a;
    --accent-soft: #1f2a4a; --good: #5fd39a; --good-soft: #15302a; --warn: #f3a46b; --warn-soft: #3a2518;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f131a; --panel: #171c25; --ink: #e8ecf3; --ink-2: #a9b2c2; --ink-3: #7c8698;
  --rule: #283040; --track: #212836; --bar: #4a5468; --accent: #7f9cff; --accent-ink: #0f131a;
  --accent-soft: #1f2a4a; --good: #5fd39a; --good-soft: #15302a; --warn: #f3a46b; --warn-soft: #3a2518;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.5 var(--f-body);
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 20px 32px;
  -webkit-tap-highlight-color: transparent;
}
.wrap { max-width: 1180px; margin: 0 auto; display: grid; gap: 20px; }

header { display: grid; gap: 4px; }
.eyebrow { font: 500 12px/1 var(--f-data); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
h1 { font: 600 clamp(28px, 4vw, 40px)/1.1 var(--f-display); margin: 0; text-wrap: balance; letter-spacing: -.01em; }
.lede { margin: 0; color: var(--ink-2); max-width: 68ch; }

.presets { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.presets .lbl { font: 500 12px/1 var(--f-data); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-right: 4px; }

.grid { display: grid; grid-template-columns: minmax(280px, 360px) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 860px) { .grid { grid-template-columns: minmax(0, 1fr); } }

.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 18px; display: grid; gap: 22px; min-width: 0; }
fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 10px; min-width: 0; }
legend { padding: 0; margin-bottom: 10px; font: 600 13px/1.2 var(--f-body); }
legend small, .hint { display: block; font-weight: 400; color: var(--ink-3); font-size: 12.5px; margin-top: 2px; }
.group-lbl { font: 500 11px/1 var(--f-data); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-top: 4px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font: 500 14px/1 var(--f-body); color: var(--ink);
  min-height: 44px; padding: 0 14px; border-radius: 8px;
  border: 1px solid var(--rule); background: var(--panel); cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.chip:hover { border-color: var(--ink-3); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.chip:focus-visible, .switch:focus-visible, input[type=range]:focus-visible, .bar-row:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.chip .tag { font: 400 11px/1 var(--f-data); opacity: .75; }
.presets .chip { min-height: 38px; font-size: 13.5px; }

.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.switch {
  position: relative; width: 56px; height: 32px; flex: none; border-radius: 16px; border: 0; cursor: pointer;
  background: var(--track); box-shadow: inset 0 0 0 1px var(--rule);
}
.switch::after { content: ""; position: absolute; top: 4px; left: 4px; width: 24px; height: 24px; border-radius: 50%; background: var(--panel); box-shadow: 0 1px 2px rgba(0,0,0,.25); transition: transform .18s ease; }
.switch[aria-checked="true"] { background: var(--accent); box-shadow: none; }
.switch[aria-checked="true"]::after { transform: translateX(24px); }
.slider { display: grid; gap: 6px; }
.slider[aria-disabled="true"] { opacity: .4; }
input[type=range] { width: 100%; accent-color: var(--accent); height: 32px; margin: 0; }
.ticks { display: flex; justify-content: space-between; font: 400 11px/1 var(--f-data); color: var(--ink-3); }
.nval { font: 500 14px/1.3 var(--f-data); }

.readouts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 520px) { .readouts { grid-template-columns: minmax(0, 1fr); } }
.tile { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 16px 18px; display: grid; gap: 6px; min-width: 0; }
.tile .k { font: 500 12px/1.2 var(--f-data); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.tile .v { font: 600 clamp(34px, 5vw, 48px)/1 var(--f-display); font-variant-numeric: tabular-nums; }
.tile .v .u { font-size: .5em; font-weight: 500; color: var(--ink-2); margin-left: 4px; }
.tile .sub { color: var(--ink-2); font-size: 13.5px; }
.delta { justify-self: start; font: 500 13px/1 var(--f-data); padding: 6px 8px; border-radius: 6px; }
.delta.good { background: var(--good-soft); color: var(--good); }
.delta.warn { background: var(--warn-soft); color: var(--warn); }
.delta.same { background: var(--track); color: var(--ink-2); }

.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 620px) { .facts { grid-template-columns: minmax(0, 1fr); } }
.fact { border-top: 1px solid var(--rule); padding-top: 10px; min-width: 0; }
.fact .k { font-size: 12.5px; color: var(--ink-3); }
.fact .v { font: 500 16px/1.3 var(--f-data); font-variant-numeric: tabular-nums; }
.share { height: 8px; border-radius: 4px; background: var(--track); margin-top: 6px; overflow: hidden; }
.share > span { display: block; height: 100%; background: var(--accent); border-radius: 4px; transition: width .25s ease; }

.charts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 1040px) { .charts { grid-template-columns: minmax(0, 1fr); } }
.chart h2 { margin: 0; font: 600 15px/1.2 var(--f-body); }
.chart .hint { margin: 0; }
.bars { display: grid; gap: 4px; }
.bar-row {
  display: grid; grid-template-columns: 9.5em minmax(0, 1fr); gap: 10px; align-items: center;
  min-height: 34px; border-radius: 6px; cursor: pointer; padding: 0 4px; margin: 0 -4px;
}
.bar-row:hover { background: var(--track); }
.bar-row .name { font-size: 13px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar-row.sel .name { color: var(--ink); font-weight: 600; }
.track { position: relative; height: 18px; }
.track .fill { position: absolute; left: 0; top: 2px; bottom: 2px; background: var(--bar); border-radius: 0 4px 4px 0; transition: width .25s ease; }
.bar-row.sel .fill { background: var(--accent); }
.track .val { position: absolute; top: 50%; transform: translateY(-50%); font: 400 12px/1 var(--f-data); color: var(--ink-2); white-space: nowrap; font-variant-numeric: tabular-nums; transition: left .25s ease; }
.bar-row.sel .val { color: var(--ink); font-weight: 500; }
.base { position: absolute; top: -3px; bottom: -3px; width: 0; border-left: 1.5px dashed var(--ink-3); pointer-events: none; transition: left .25s ease; }
.axis-note { font: 400 11.5px/1.3 var(--f-data); color: var(--ink-3); display: flex; align-items: center; gap: 6px; }
.axis-note i { display: inline-block; width: 0; height: 12px; border-left: 1.5px dashed var(--ink-3); }

details { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 12px 18px; }
summary { cursor: pointer; font-weight: 600; font-size: 14px; min-height: 28px; display: flex; align-items: center; }
.tbl-wrap { overflow-x: auto; margin-top: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; font-variant-numeric: tabular-nums; }
th, td { text-align: right; padding: 6px 10px; border-bottom: 1px solid var(--rule); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
th { font: 500 11.5px/1.2 var(--f-data); color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; }
td { font-family: var(--f-data); }
tr.sel td { color: var(--accent); font-weight: 500; }

.notes { color: var(--ink-2); font-size: 13px; display: grid; gap: 6px; max-width: 90ch; }
.notes p { margin: 0; }
code { font-family: var(--f-data); font-size: .92em; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* ---------- shared site chrome (both demos + landing) ---------- */
a { color: var(--accent); }
.sitenav { max-width: 1180px; margin: 0 auto 4px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: 14px; }
.sitenav .home { font: 600 14px/1 var(--f-display); color: var(--ink); text-decoration: none; margin-right: 10px; letter-spacing: .01em; }
.sitenav .tab { display: inline-flex; align-items: center; min-height: 36px; padding: 0 12px; border-radius: 8px; color: var(--ink-2); text-decoration: none; border: 1px solid transparent; }
.sitenav .tab:hover { border-color: var(--rule); color: var(--ink); }
.sitenav .tab[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.sitenav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* segmented control */
.seg { display: inline-flex; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; background: var(--panel); flex-wrap: wrap; }
.seg button { font: 500 13.5px/1 var(--f-body); color: var(--ink-2); background: transparent; border: 0; min-height: 40px; padding: 0 12px; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--rule); }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }
.seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.tooltip { position: fixed; z-index: 10; pointer-events: none; background: var(--ink); color: var(--bg); font: 400 12.5px/1.35 var(--f-body); padding: 7px 9px; border-radius: 6px; max-width: 260px; box-shadow: 0 4px 14px rgba(0,0,0,.18); opacity: 0; transition: opacity .1s; }
.tooltip b { font-weight: 600; }
.tooltip.on { opacity: 1; }