:root {
  color-scheme: light;
  --bg: #f3f3f1; --surface: #fcfcfb; --ink: #0b0b0b; --ink-2: #52514e; --ink-3: #7c7b76;
  --line: #e6e5e1; --line-2: #d6d5d0; --soft: #eef4fd; --wash: #f6f6f4;
  --s1: #2a78d6; --s2: #eb6834;
  --h0: #efeeea; --h1: #cde2fb; --h2: #9ec5f4; --h3: #6da7ec; --h4: #3987e5; --h5: #256abf; --h6: #184f95;
  --good: #006300; --bad: #d03b3b; --good-bg: #e6f4e6; --bad-bg: #fbe9e9;
  --brand: #2a78d6; --brand-ink: #fff; --danger: #d03b3b;
  --shadow: 0 1px 2px rgba(11, 11, 11, .04), 0 4px 16px rgba(11, 11, 11, .04);
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #121211; --surface: #1a1a19; --ink: #ffffff; --ink-2: #c3c2b7; --ink-3: #8e8d85;
    --line: #2e2e2c; --line-2: #3d3d3a; --soft: #1c2a40; --wash: #212120;
    --s1: #3987e5; --s2: #d95926;
    --h0: #242423; --h1: #1c3a66; --h2: #1c5cab; --h3: #2a78d6; --h4: #3987e5; --h5: #6da7ec; --h6: #9ec5f4;
    --good: #4cd08a; --bad: #ff7b70; --good-bg: #16301f; --bad-bg: #3a1c1a;
    --brand: #3987e5; --brand-ink: #0c1020; --danger: #ff7b70;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Arial, sans-serif; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 6px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- shell ---------- */
header.top { display: flex; align-items: center; gap: 14px; padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
header.top h1 { margin: 0; font-size: 17px; letter-spacing: -.01em; }
nav.tabs { display: flex; gap: 2px; flex: 1; overflow-x: auto; }
.tab { border: 0; background: none; padding: 8px 14px; border-radius: 8px; cursor: pointer; color: var(--ink-2); white-space: nowrap; }
.tab:hover { background: var(--wash); }
.tab[aria-selected="true"] { background: var(--soft); color: var(--brand); font-weight: 600; }
main { max-width: 1180px; margin: 0 auto; padding: 20px 16px 60px; }
.live { display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; color: var(--ink-2); background: var(--surface); }
.live b { color: var(--ink); font-variant-numeric: tabular-nums; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-3); display: inline-block; }
.live.on .dot { background: var(--good); box-shadow: 0 0 0 0 color-mix(in srgb, var(--good) 50%, transparent); animation: pulse 1.8s infinite; }
.live.off .dot { background: var(--bad); }
@keyframes pulse { 70% { box-shadow: 0 0 0 8px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
@media (prefers-reduced-motion: reduce) { .live.on .dot { animation: none; } * { transition: none !important; } }

/* ---------- cards & layout ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); min-width: 0; }
.card > header { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.card h2 { margin: 0; font-size: 16px; letter-spacing: -.01em; }
.card h3 { margin: 18px 0 8px; font-size: 14px; color: var(--ink-3); font-weight: 600; }
.card .sub { color: var(--ink-3); font-size: 13px; flex: 1; }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.stack { display: flex; flex-direction: column; gap: 16px; }
.layout { display: grid; grid-template-columns: 290px 1fr; gap: 16px; align-items: start; }
@media (max-width: 820px) { .layout { grid-template-columns: 1fr; } }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .spacer { flex: 1; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--surface); }
.seg button { border: 0; background: none; padding: 7px 14px; cursor: pointer; color: var(--ink-2); }
.seg button + button { border-inline-start: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--soft); color: var(--brand); font-weight: 600; }
.muted { color: var(--ink-3); font-size: 14px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.grow > input[type=text] { flex: 1; min-width: 140px; }
.insight { margin: 0 0 12px; color: var(--ink-2); font-size: 14px; }
.insight b { color: var(--ink); }
.stale { opacity: .55; transition: opacity .15s; }

/* ---------- KPI tiles ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; }
.kpi .label { font-size: 13px; color: var(--ink-2); }
.kpi .value { font-size: 32px; font-weight: 650; line-height: 1.1; letter-spacing: -.02em; font-variant-numeric: proportional-nums; }
.kpi .foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; min-height: 30px; }
.delta { font-size: 12.5px; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.delta.good { color: var(--good); background: var(--good-bg); }
.delta.bad { color: var(--bad); background: var(--bad-bg); }
.delta.flat { color: var(--ink-3); background: var(--wash); }

/* ---------- charts ---------- */
.chart { display: block; overflow: visible; max-width: 100%; }
.chart text { font: 11px system-ui, sans-serif; fill: var(--ink-3); }
.chart .val { fill: var(--ink); font-weight: 600; }
.chart .label-peak { fill: var(--ink-2); }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .baseline { stroke: var(--line-2); stroke-width: 1; }
.chart .bar.s1 { fill: var(--s1); } .chart .bar.s2 { fill: var(--s2); }
.chart .mark:hover .bar, .chart .mark:focus .bar { filter: brightness(1.12); }
.chart .line-ma { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; opacity: .8; }
.chart .cross { stroke: var(--ink-3); stroke-width: 1; }
.chart .hit { fill: transparent; pointer-events: all; }
.chart .cell { stroke: none; } .chart .cell:hover { stroke: var(--ink); stroke-width: 1.5; }
.cell.h0 { fill: var(--h0); } .cell.h1 { fill: var(--h1); } .cell.h2 { fill: var(--h2); } .cell.h3 { fill: var(--h3); }
.cell.h4 { fill: var(--h4); } .cell.h5 { fill: var(--h5); } .cell.h6 { fill: var(--h6); }
.spark { flex: none; }
.spark-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.spark-line.s1 { stroke: var(--s1); } .spark-dot.s1 { fill: var(--s1); stroke: var(--surface); stroke-width: 2; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--ink-2); margin-bottom: 8px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.key { display: inline-block; width: 14px; height: 4px; border-radius: 2px; background: var(--ink); }
.key.s1 { background: var(--s1); } .key.s2 { background: var(--s2); } .key.ma { background: var(--ink); opacity: .8; }
.heat-legend { display: flex; align-items: center; gap: 4px; justify-content: flex-end; font-size: 12px; color: var(--ink-3); margin-top: 8px; }
.chart-host { min-height: 60px; outline-offset: 4px; }
.empty { display: grid; place-items: center; min-height: 140px; color: var(--ink-3); text-align: center; padding: 20px; border: 1px dashed var(--line-2); border-radius: 12px; }
.tip { position: fixed; z-index: 50; pointer-events: none; opacity: 0; transition: opacity .08s; background: var(--surface); color: var(--ink); border: 1px solid var(--line-2); border-radius: 10px; padding: 8px 12px; box-shadow: 0 6px 24px rgba(0, 0, 0, .18); font-size: 13px; min-width: 130px; }
.tip.on { opacity: 1; }
.tip-title { color: var(--ink-2); margin-bottom: 4px; font-size: 12px; }
.tip-row { display: flex; align-items: center; gap: 8px; }
.tip-row b { font-variant-numeric: tabular-nums; }
.tip-row span { color: var(--ink-2); }

/* ---------- horizontal bars / meters ---------- */
.hbars { display: flex; flex-direction: column; gap: 8px; }
.hrow { display: grid; grid-template-columns: minmax(80px, 34%) 1fr 48px; align-items: center; gap: 10px; font-size: 14px; border-radius: 6px; padding: 2px 4px; }
.hrow:hover { background: var(--wash); }
.hl { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-2); }
.track { display: block; height: 10px; background: var(--wash); border-radius: 5px; overflow: hidden; }
.fill { display: block; height: 100%; background: var(--s1); border-radius: 5px; transition: width .4s; }
.hv { text-align: end; font-variant-numeric: tabular-nums; }
.meter { display: inline-grid; grid-template-columns: 90px auto; align-items: center; gap: 8px; }
.meter b { font-variant-numeric: tabular-nums; font-size: 13px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; }
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th { text-align: start; color: var(--ink-3); font-weight: 600; font-size: 12.5px; padding: 8px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.t td { padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.t tr:last-child td { border-bottom: 0; }
table.t tr.off td { opacity: .5; }
table.t .num { font-variant-numeric: tabular-nums; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px; font-size: 12.5px; background: var(--wash); color: var(--ink-2); }
.pill.good { color: var(--good); background: var(--good-bg); }
.pill.bad { color: var(--bad); background: var(--bad-bg); }
.view-toggle { border: 1px solid var(--line); background: none; border-radius: 8px; padding: 3px 10px; font-size: 12.5px; cursor: pointer; color: var(--ink-2); }
.view-toggle:hover { background: var(--wash); }

/* ---------- tree & forms ---------- */
ul.tree, ul.tree ul { list-style: none; margin: 0; padding: 0; }
ul.tree ul { padding-inline-start: 18px; border-inline-start: 1px dashed var(--line-2); margin-inline-start: 10px; }
.node-btn { display: flex; align-items: center; gap: 8px; width: 100%; text-align: start; border: 0; background: none; padding: 7px 8px; border-radius: 8px; cursor: pointer; }
.node-btn:hover { background: var(--wash); }
.node-btn[aria-current="true"] { background: var(--soft); color: var(--brand); font-weight: 600; }
.badge { display: inline-grid; place-items: center; min-width: 24px; height: 24px; border-radius: 6px; background: var(--wash); border: 1px solid var(--line); font-size: 13px; font-weight: 700; }
input[type=text], input[type=password], select { padding: 8px 10px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--surface); min-width: 0; }
.btn { border: 1px solid var(--line-2); background: var(--surface); padding: 8px 14px; border-radius: 8px; cursor: pointer; }
.btn:hover { background: var(--wash); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn.rec.on { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn:disabled { opacity: .5; cursor: default; }
label.btn { position: relative; display: inline-flex; align-items: center; gap: 6px; overflow: hidden; }
input.file { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.slot { border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.slot .title { font-weight: 600; margin-bottom: 4px; }
.slot .empty-note { color: var(--bad); font-size: 14px; margin: 4px 0; }
audio { height: 36px; max-width: 100%; }
.form { display: grid; gap: 10px; max-width: 380px; }
.form label { display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }
.err { color: var(--bad); min-height: 1.4em; font-size: 14px; }
.login { max-width: 360px; margin: 14vh auto; }
.login input { width: 100%; }
.status-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
#toast { position: fixed; bottom: 16px; inset-inline: 16px; margin-inline: auto; max-width: 420px; background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 10px; opacity: 0; pointer-events: none; transition: opacity .2s; text-align: center; z-index: 60; }
#toast.show { opacity: 1; }
#toast.bad { background: var(--danger); color: #fff; }