:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f3f2ee;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --accent: #2a78d6;
  --accent-ink: #1c5cab;
  --s1: #2a78d6;
  --s2: #eb6834;
  --good: #0ca30c;
  --good-ink: #006300;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --crit-ink: #b42318;
  --seq-0: #f0efec;
  --seq-1: #cde2fb;
  --seq-2: #9ec5f4;
  --seq-3: #6da7ec;
  --seq-4: #3987e5;
  --seq-5: #256abf;
  --seq-6: #184f95;
  --seq-7: #0d366b;
  --code-bg: #f3f2ee;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
@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, 0.1);
    --accent: #3987e5;
    --accent-ink: #86b6ef;
    --s1: #3987e5;
    --s2: #d95926;
    --good-ink: #0ca30c;
    --crit-ink: #e66767;
    --seq-0: #262624;
    --seq-1: #104281;
    --seq-2: #184f95;
    --seq-3: #1c5cab;
    --seq-4: #256abf;
    --seq-5: #3987e5;
    --seq-6: #6da7ec;
    --seq-7: #9ec5f4;
    --code-bg: #121211;
  }
}
: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, 0.1);
  --accent: #3987e5;
  --accent-ink: #86b6ef;
  --s1: #3987e5;
  --s2: #d95926;
  --good-ink: #0ca30c;
  --crit-ink: #e66767;
  --seq-0: #262624;
  --seq-1: #104281;
  --seq-2: #184f95;
  --seq-3: #1c5cab;
  --seq-4: #256abf;
  --seq-5: #3987e5;
  --seq-6: #6da7ec;
  --seq-7: #9ec5f4;
  --code-bg: #121211;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--page);
  color: var(--ink);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 15px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 16px 0 8px; }
code, pre { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 12.5px; }
.muted { color: var(--muted); }
.ink2 { color: var(--ink-2); }
.num { font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }

/* ── Layout ─────────────────────────────── */
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.side {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px 12px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.brand { font-weight: 700; font-size: 16px; padding: 4px 8px 16px; display: flex; align-items: center; gap: 8px; }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.nav a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 10px; border-radius: 6px; color: var(--ink-2); margin-bottom: 2px;
}
.nav a:hover { background: var(--surface-2); text-decoration: none; }
.nav a.active { background: var(--surface-2); color: var(--ink); font-weight: 600; }
.nav .badge { background: var(--critical); color: #fff; border-radius: 10px; font-size: 11px; padding: 0 7px; font-weight: 600; }
.side-foot { margin-top: 24px; padding: 0 8px; font-size: 12px; }
.main { padding: 20px 24px 48px; min-width: 0; }
.topbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 20px; }
.topbar .title { flex: 1 1 auto; min-width: 200px; }
.menu-btn { display: none; }

select, input, button, textarea {
  font: inherit; color: var(--ink);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px;
}
button { cursor: pointer; }
button:hover { background: var(--surface-2); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.55; cursor: default; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; border-right: 1px solid var(--border); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--surface-2); font-weight: 600; }

.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; box-shadow: var(--shadow); min-width: 0;
}
.card + .card { margin-top: 0; }
.stack > * + * { margin-top: 16px; }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.card-head h2 { margin: 0; }

/* ── KPI tile ───────────────────────────── */
.kpi .label { color: var(--ink-2); font-size: 13px; }
.kpi .value { font-size: 26px; font-weight: 650; margin: 2px 0; }
.kpi .delta { font-size: 12.5px; }
.up-good, .down-good { color: var(--good-ink); }
.up-bad, .down-bad { color: var(--crit-ink); }

/* ── Bars list ──────────────────────────── */
.bars { list-style: none; margin: 0; padding: 0; }
.bars li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 10px; padding: 5px 0; position: relative; }
.bars .k { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bars .v { color: var(--ink-2); font-variant-numeric: tabular-nums; text-align: right; }
.bars .track { grid-column: 1 / -1; height: 6px; background: transparent; }
.bars .fill { height: 6px; border-radius: 0 4px 4px 0; background: var(--s1); min-width: 2px; }

/* ── Tables ─────────────────────────────── */
.tbl-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: none; white-space: nowrap; }
td.r, th.r { text-align: right; font-variant-numeric: tabular-nums; }
tr.click { cursor: pointer; }
tr.click:hover td { background: var(--surface-2); }

/* ── Error list ─────────────────────────── */
.err-row { display: grid; grid-template-columns: 6px minmax(0, 1fr) 110px 90px 90px; gap: 14px; align-items: center; padding: 14px 12px; border-bottom: 1px solid var(--grid); cursor: pointer; }
.err-row:hover { background: var(--surface-2); }
.sev-bar { width: 4px; height: 100%; min-height: 40px; border-radius: 2px; }
.sev-high { background: var(--critical); }
.sev-medium { background: var(--serious); }
.sev-low { background: var(--axis); }
.err-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.err-explain { color: var(--ink-2); font-size: 13.5px; margin-top: 2px; }
.err-meta { color: var(--muted); font-size: 12px; margin-top: 4px; display: flex; flex-wrap: wrap; gap: 4px 12px; }
.err-num { text-align: right; font-variant-numeric: tabular-nums; }
.err-num b { display: block; font-size: 16px; }
.err-num span { color: var(--muted); font-size: 12px; }
.pill { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; padding: 1px 8px; border-radius: 10px; background: var(--surface-2); color: var(--ink-2); white-space: nowrap; }
.pill.high { color: var(--crit-ink); }
.pill.medium { color: #b54708; }
:root[data-theme="dark"] .pill.medium { color: var(--serious); }

/* ── Diagnosis ──────────────────────────── */
.dx-summary { font-size: 15px; line-height: 1.6; }
.cause { padding: 10px 12px; border-radius: 8px; background: var(--surface-2); margin-bottom: 8px; }
.cause .ev { color: var(--ink-2); font-size: 13px; margin-top: 4px; }
.fix { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; overflow: hidden; }
.fix-head { padding: 10px 12px; background: var(--surface-2); display: flex; justify-content: space-between; gap: 8px; align-items: flex-start; }
.fix-head b { display: block; }
.fix-head .where { color: var(--ink-2); font-size: 12.5px; }
.fix pre { margin: 0; padding: 12px; background: var(--code-bg); overflow-x: auto; white-space: pre; }
.fix .note { padding: 8px 12px; font-size: 13px; color: var(--ink-2); border-top: 1px solid var(--grid); }
.md { line-height: 1.6; }
.md h2 { font-size: 15px; margin: 18px 0 8px; }
.md h3 { font-size: 14px; }
.md pre { background: var(--code-bg); padding: 12px; border-radius: 8px; overflow-x: auto; }
.md code { background: var(--code-bg); padding: 1px 4px; border-radius: 4px; }
.md pre code { background: none; padding: 0; }

/* ── Charts ─────────────────────────────── */
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; overflow: visible; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .baseline { stroke: var(--axis); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .crosshair { stroke: var(--axis); stroke-width: 1; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 12.5px; color: var(--ink-2); margin-bottom: 6px; }
.legend i { display: inline-block; width: 12px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 6px; }
.tip {
  position: absolute; pointer-events: none; z-index: 5;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12); padding: 8px 10px; font-size: 12.5px;
  white-space: nowrap; transform: translate(-50%, calc(-100% - 10px));
}
.tip .t { color: var(--muted); margin-bottom: 2px; }
.tip i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.heat { display: grid; grid-template-columns: 34px repeat(24, minmax(0, 1fr)); gap: 2px; position: relative; }
.heat .c { aspect-ratio: 1.6; border-radius: 3px; background: var(--seq-0); }
.heat .lbl { font-size: 11px; color: var(--muted); display: flex; align-items: center; }
.heat .hl { font-size: 10px; color: var(--muted); text-align: center; }
.heat-scale { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--muted); margin-top: 8px; }
.heat-scale span.sw { width: 18px; height: 10px; border-radius: 2px; display: inline-block; }

/* ── Funnel ─────────────────────────────── */
.fstep { display: grid; grid-template-columns: 26px minmax(0, 1fr) 90px 70px; gap: 10px; align-items: center; padding: 6px 0; }
.fstep .n { width: 22px; height: 22px; border-radius: 50%; background: var(--surface-2); text-align: center; font-size: 12px; line-height: 22px; color: var(--ink-2); }
.fbar { height: 22px; background: var(--surface-2); border-radius: 0 4px 4px 0; position: relative; overflow: hidden; }
.fbar > div { height: 100%; background: var(--s1); border-radius: 0 4px 4px 0; }
.fbar span { position: absolute; left: 8px; top: 0; line-height: 22px; font-size: 12.5px; color: var(--ink); text-shadow: 0 0 3px var(--surface); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; right: 8px; }
.fdrop { grid-column: 2 / -1; font-size: 12.5px; color: var(--crit-ink); padding: 2px 0 6px; }
.fdrop .why { color: var(--ink-2); }

/* ── Timeline ───────────────────────────── */
.tl { list-style: none; margin: 0; padding: 0; }
.tl li { display: grid; grid-template-columns: 70px 22px minmax(0, 1fr); gap: 8px; padding: 6px 0; border-bottom: 1px dashed var(--grid); }
.tl .time { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 12px; }
.tl .ic { text-align: center; }
.tl li.bad { background: color-mix(in srgb, var(--critical) 8%, transparent); }
.tl .sub { color: var(--ink-2); font-size: 12.5px; }

/* ── Misc ───────────────────────────────── */
.empty { padding: 40px 16px; text-align: center; color: var(--muted); }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--surface); padding: 10px 16px; border-radius: 8px; z-index: 50; }
.login { max-width: 360px; margin: 12vh auto; padding: 0 16px; }
.login .card { padding: 24px; }
.login input { width: 100%; margin: 8px 0 12px; padding: 10px; }
.login button { width: 100%; padding: 10px; }
.snippet { background: var(--code-bg); padding: 12px; border-radius: 8px; overflow-x: auto; white-space: pre; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.spark { display: block; }
.steps-editor .srow { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr auto auto; gap: 6px; margin-bottom: 6px; }
.steps-editor input, .steps-editor select { width: 100%; }

@media (max-width: 960px) {
  .g2, .g3 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .side { position: fixed; z-index: 30; left: 0; top: 0; width: 240px; transform: translateX(-100%); transition: transform 0.2s; }
  .side.open { transform: none; box-shadow: 0 0 40px rgba(0, 0, 0, 0.3); }
  .menu-btn { display: inline-block; }
  .main { padding: 14px 16px 40px; }
  .err-row { grid-template-columns: 4px minmax(0, 1fr) 70px; }
  .err-row .spark-cell, .err-row .users-cell { display: none; }
  .fstep { grid-template-columns: 22px minmax(0, 1fr) 70px; }
  .fstep .pct2 { display: none; }
  .steps-editor .srow { grid-template-columns: 1fr 1fr; }
}