:root {
  color-scheme: light;
  --page: #f4f4f1;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11,11,11,0.10);
  --accent: #1c5cab;
  --accent-ink: #ffffff;
  --good: #006300;
  --early: #2a78d6;
  --zipper: #1baf7a;
  --ffa: #eb6834;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.04);
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d; --surface: #1a1a19; --surface-2: #232321;
    --ink: #f0efec; --ink-2: #c3c2b7; --muted: #898781;
    --grid: #2c2c2a; --axis: #383835; --border: rgba(255,255,255,0.10);
    --accent: #5598e7; --accent-ink: #0b0b0b; --good: #0ca30c;
    --early: #3987e5; --zipper: #199e70; --ffa: #d95926;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --surface-2: #232321;
  --ink: #f0efec; --ink-2: #c3c2b7; --muted: #898781;
  --grid: #2c2c2a; --axis: #383835; --border: rgba(255,255,255,0.10);
  --accent: #5598e7; --accent-ink: #0b0b0b; --good: #0ca30c;
  --early: #3987e5; --zipper: #199e70; --ffa: #d95926;
  --shadow: none;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--page); color: var(--ink); }
body { font-size: 14px; line-height: 1.45; }
h1, h2, h3 { margin: 0; font-weight: 650; }
h1 { font-size: 18px; letter-spacing: -0.01em; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); }
h3 { font-size: 13px; margin: 14px 0 6px; color: var(--ink-2); }
button, select, input { font: inherit; color: inherit; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px;
  padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 260px; }
.logo { width: 30px; height: 30px; color: var(--accent); flex: none; }
.sub { margin: 0; color: var(--ink-2); font-size: 12.5px; }
.transport { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.tbtns { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.topright { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; align-self: flex-start; }
.clock { display: flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; min-height: 24px; }
#clock { font-size: 16px; font-weight: 650; min-width: 44px; }
.phase { font-size: 11.5px; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--border); color: var(--ink-2); white-space: nowrap; }
.phase.measure { color: var(--good); border-color: currentColor; }
.phase.done { color: var(--accent); border-color: currentColor; }

.btn {
  border: 1px solid var(--border); background: var(--surface-2); padding: 6px 12px; border-radius: 8px;
  cursor: pointer; white-space: nowrap; transition: background .12s, border-color .12s;
}
.btn:hover { border-color: var(--axis); }
.btn:focus-visible, select:focus-visible, input:focus-visible, .seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; min-width: 84px; }
.btn.accent { background: var(--ink); color: var(--surface); border-color: transparent; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 4px 9px; font-size: 12.5px; }
.btn:disabled { opacity: .5; cursor: default; }
.filebtn { position: relative; overflow: hidden; display: inline-block; }
.filebtn input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
label.inline { display: flex; align-items: center; gap: 6px; color: var(--ink-2); }
select { background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 5px 8px; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 16px; padding: 16px 20px 40px; align-items: start; }
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 4px 16px 16px; position: sticky; top: 76px; max-height: calc(100vh - 92px); overflow: auto;
}
.panel section { padding: 14px 0 6px; border-bottom: 1px solid var(--border); }
.panel section:last-child { border-bottom: 0; }
.panel h2 { margin-bottom: 10px; }
.row { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }

.field { margin-bottom: 10px; }
.field > label, .field .lbl { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--ink); margin-bottom: 3px; }
.field .val { display: flex; align-items: center; gap: 4px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.field .val input[type=number] {
  width: 74px; text-align: right; padding: 2px 6px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface-2);
}
.field input[type=range] { width: 100%; accent-color: var(--accent); margin: 2px 0; }
.field.strat .lbl i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.hint { color: var(--muted); font-size: 12px; margin: 4px 0 8px; }
.hint.center { text-align: center; margin: 2px 0 8px; }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--surface-2); }
.seg button { border: 0; background: transparent; padding: 5px 10px; cursor: pointer; color: var(--ink-2); }
.seg button.on { background: var(--ink); color: var(--surface); }
.seg.small button { font-size: 12px; padding: 3px 8px; }

.mixbar { display: flex; height: 10px; border-radius: 5px; overflow: hidden; margin: 2px 0 12px; gap: 2px; background: var(--surface); }
.mixbar span { display: block; height: 100%; transition: width .15s; }
.mixbar .early, .sw.early, .field.strat .early { background: var(--early); }
.mixbar .zipper, .sw.zipper, .field.strat .zipper { background: var(--zipper); }
.mixbar .ffa, .sw.ffa, .field.strat .ffa { background: var(--ffa); }
.explain { margin: 6px 0 4px; font-size: 13px; }
.explain summary { cursor: pointer; color: var(--accent); }
.explain dl { margin: 8px 0 0; }
.explain dt { font-weight: 600; margin-top: 8px; }
.explain dd { margin: 2px 0 0 18px; color: var(--ink-2); }
.sw { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; }

/* ---------- main ---------- */
main { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px 16px; min-width: 0; }
.cardhead { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.cardhead .unit { color: var(--muted); font-size: 12px; }
.cardhead .seg, .cardhead .btn { margin-left: auto; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-2); }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend i { width: 14px; height: 8px; border-radius: 2px; display: inline-block; }
.canvaswrap { width: 100%; }
canvas { display: block; width: 100%; }
#cvOverview { cursor: pointer; border-radius: 6px; }
#tblFair { overflow-x: auto; }
#cvDetail { border-radius: 6px; }

.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; box-shadow: var(--shadow); }
.kpi .k { font-size: 12px; color: var(--ink-2); display: flex; justify-content: space-between; gap: 6px; }
.kpi .v { font-size: 24px; font-weight: 650; margin-top: 2px; letter-spacing: -0.01em; }
.kpi .v small { font-size: 13px; font-weight: 500; color: var(--ink-2); margin-left: 3px; }
.kpi .s { font-size: 12px; color: var(--muted); }

.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.chartwrap { position: relative; }
.tip {
  position: absolute; pointer-events: none; background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 9px; font-size: 12px; box-shadow: 0 4px 14px rgba(0,0,0,.12); display: none; white-space: nowrap; z-index: 2;
  font-variant-numeric: tabular-nums;
}
.tip b { font-weight: 600; }
.tip .r { display: flex; align-items: center; gap: 6px; }
.tip .r i { width: 10px; height: 3px; display: inline-block; border-radius: 2px; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { white-space: nowrap; padding: 6px 8px; text-align: right; border-bottom: 1px solid var(--grid); font-variant-numeric: tabular-nums; }
th:first-child, td:first-child { text-align: left; }
th { font-weight: 600; color: var(--ink-2); font-size: 12px; }
td .sw { vertical-align: 0; }
td.best { font-weight: 700; color: var(--good); }
td.best::after { content: " ✓"; font-size: 11px; }
.tblnote { color: var(--muted); font-size: 12px; margin-top: 8px; }

.progress { height: 4px; background: var(--surface-2); border-radius: 2px; overflow: hidden; margin-bottom: 12px; }
.progress div { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.cmpgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 14px; }
.cmpgrid .mini h3 { margin: 0 0 6px; font-size: 12.5px; }
.verdict { background: var(--surface-2); border-radius: 8px; padding: 10px 12px; margin-bottom: 12px; font-size: 13.5px; }

.method summary { cursor: pointer; list-style: none; }
.method summary::-webkit-details-marker { display: none; }
.method summary h2 { display: inline; }
.method summary h2::after { content: "  +"; color: var(--muted); }
.method details[open] summary h2::after { content: "  −"; }
.methodbody { color: var(--ink-2); font-size: 13.5px; max-width: 900px; }
.methodbody code { background: var(--surface-2); padding: 1px 5px; border-radius: 4px; font-size: 12.5px; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px); opacity: 0;
  background: var(--ink); color: var(--surface); padding: 8px 14px; border-radius: 8px; font-size: 13px;
  transition: opacity .2s, transform .2s; pointer-events: none; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 1100px) {
  .grid2 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 12px 16px 32px; }
  .panel { position: static; max-height: none; }
  .topbar { padding: 10px 16px; position: static; }
  .topright { margin-left: 0; }
}

/* lane split slider */
.splitbox { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 4px 0 6px; }
.splitbox .side { display: flex; flex-direction: column; align-items: flex-start; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--border); }
.splitbox .side.r { align-items: flex-end; text-align: right; }
.splitbox .nm { font-size: 12px; color: var(--ink-2); }
.splitbox .pct { font-size: 22px; font-weight: 650; line-height: 1.15; font-variant-numeric: tabular-nums; }
.splitbox .pct b { font-weight: 650; }
.splitbox .tag { font-size: 11px; margin-top: 2px; padding: 0 6px; border-radius: 99px; border: 1px solid currentColor; }
.splitbox .side.cont .tag { color: var(--accent); }
.splitbox .side.ends .tag { color: var(--muted); }
.splitbox .side.cont { border-left: 3px solid var(--accent); }
.splitbox .side.r.cont { border-left: 1px solid var(--border); border-right: 3px solid var(--accent); }
.splitrange { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; margin: 0; cursor: pointer; }
.splitrange::-webkit-slider-runnable-track { height: 8px; border-radius: 4px; background: linear-gradient(90deg, var(--split-l) 0 var(--split), var(--split-r) var(--split) 100%); }
.splitrange::-moz-range-track { height: 8px; border-radius: 4px; background: linear-gradient(90deg, var(--split-l) 0 var(--split), var(--split-r) var(--split) 100%); }
.splitrange::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; margin-top: -6px; border-radius: 50%; background: var(--surface); border: 2px solid var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.25); }
.splitrange::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: var(--surface); border: 2px solid var(--ink); }
.splitrange:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }