/* Application shell and shared components. Reads tokens.css only; no raw
   values except structural 1px borders. One visual system everywhere. */

/* base ------------------------------------------------------------------ */
/* Aliases used across this sheet, resolved against tokens.css. They were
   previously undefined, so every var(--muted)/var(--good)/var(--warn)/
   var(--border) silently fell back to the inherited color. */
:root {
  --muted: var(--ink-3);
  --border: var(--hairline);
  --good: var(--status-good);
  --warn: var(--status-attention);
  --bad: var(--status-critical);
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--fs-14);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, table { margin: 0; }
[hidden] { display: none !important; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.mono { font-family: var(--mono); }

/* skip link -------------------------------------------------------------- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10;
  background: var(--raised);
  color: var(--ink);
  padding: var(--sp-1) var(--sp-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
}
.skip:focus-visible { left: var(--sp-2); top: var(--sp-2); }

/* shell ------------------------------------------------------------------ */
.shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  min-height: 100vh;
}
main#main {
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  padding: var(--sp-4) var(--gutter) var(--gap-section);
}
main#main > section + section { margin-top: var(--gap-section); }

/* side nav ---------------------------------------------------------------- */
.sidenav {
  border-right: 1px solid var(--hairline);
  padding: var(--sp-3) var(--sp-2);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  position: sticky;
  top: 0;
  height: 100vh;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.01em;
}
.wordmark:hover { text-decoration: none; }
.wordmark svg { width: 20px; height: 20px; color: var(--accent); flex: none; }
.nav-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-links a {
  display: block;
  padding: 6px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-chip) var(--r-chip) 0;
  color: var(--ink-2);
  transition: background var(--fade), color var(--fade);
}
.nav-links a:hover {
  background: var(--raised);
  color: var(--ink);
  text-decoration: none;
}
.nav-links a[aria-current="page"] {
  border-left-color: var(--accent);
  color: var(--link);
}
.nav-links .nav-sep { height: 1px; margin: 6px 10px; background: var(--hairline); }
.nav-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  font-size: var(--fs-12);
  color: var(--ink-3);
}
.nav-foot .build { font-family: var(--mono); }
.signout {
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: var(--fs-12);
  padding: 4px 10px;
  cursor: pointer;
  align-self: flex-start;
  transition: background var(--fade);
}
.signout:hover { background: var(--raised); color: var(--ink); }

/* view header -------------------------------------------------------------- */
.view-head { margin-bottom: var(--sp-3); }
.view-head h1 { font-size: var(--fs-20); font-weight: 600; }

/* cards ------------------------------------------------------------------ */
.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: var(--pad-card);
}
.card + .card { margin-top: var(--gutter); }
.card-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.card-title { font-size: var(--fs-16); font-weight: 500; }
.card.keyed { border-left: 3px solid var(--hairline); }

/* provenance and status chips ----------------------------------------------- */
.chip-prov {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 1px 7px;
  white-space: nowrap;
}
.chip-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-13);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 2px 9px;
  white-space: nowrap;
}
.chip-status::before { font-size: 10px; line-height: 1; }
.chip-status.good::before { content: "\25CF"; color: var(--status-good); }
.chip-status.attention::before { content: "\25C7"; color: var(--status-attention); }
.chip-status.critical::before { content: "\25A0"; color: var(--status-critical); }

/* stat tiles ---------------------------------------------------------------- */
.stat-tile .stat-label { font-size: var(--fs-13); color: var(--ink-2); }
.stat-tile .stat-value {
  font-size: var(--fs-28);
  font-weight: 600;
  line-height: 1.2;
  margin-top: 2px;
}
.stat-tile .stat-delta { font-size: var(--fs-13); color: var(--ink-2); }

/* tables ------------------------------------------------------------------ */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-13);
}
table.data th {
  position: sticky;
  top: 0;
  background: var(--raised);
  color: var(--ink-2);
  font-weight: 500;
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--hairline);
}
table.data td {
  height: 40px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--hairline);
}
table.data tr:hover td { background: var(--raised); }
table.data th.num, table.data td.num {
  text-align: right;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* forms and buttons ---------------------------------------------------------- */
input[type="text"], input[type="password"], input[type="number"], input:not([type]), textarea, select {
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--fs-14);
  padding: 9px 11px;
  width: 100%;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); outline: none; }
.btn {
  display: inline-block;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--r-card);
  color: var(--bg);
  font-family: var(--sans);
  font-size: var(--fs-13);
  font-weight: 600;
  padding: 9px 16px;
  cursor: pointer;
  transition: filter var(--fade);
}
.btn:hover { filter: brightness(1.08); }

/* disclosures ---------------------------------------------------------------- */
details.disclosure { border: 1px solid var(--hairline); border-radius: var(--r-card); }
details.disclosure > summary {
  cursor: pointer;
  padding: 10px var(--sp-2);
  color: var(--ink-2);
  font-size: var(--fs-13);
  list-style: none;
}
details.disclosure > summary::before { content: "+ "; font-family: var(--mono); }
details.disclosure[open] > summary::before { content: "\2212 "; }
details.disclosure > .disclosure-body { padding: 0 var(--sp-2) var(--sp-2); }

/* empty states: one quiet sentence ----------------------------------------- */
.empty { font-size: var(--fs-13); color: var(--ink-3); }

/* login ------------------------------------------------------------------ */
body.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: var(--sp-3);
}
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: var(--sp-4) var(--sp-3);
}
.login-card .wordmark { margin-bottom: var(--sp-3); }
.login-card h1 { font-size: var(--fs-20); font-weight: 600; margin-bottom: var(--sp-3); }
.login-card label {
  display: block;
  font-size: var(--fs-13);
  color: var(--ink-2);
  margin: var(--sp-2) 0 6px;
}
.login-card input.code {
  font-family: var(--mono);
  letter-spacing: 0.4em;
  text-align: center;
}
.login-card .btn { width: 100%; margin-top: var(--sp-3); }
.form-err {
  margin-top: var(--sp-2);
  font-size: var(--fs-13);
  color: var(--ink-2);
  border-left: 2px solid var(--hairline);
  padding-left: 10px;
}
.login-foot { margin-top: var(--sp-3); font-size: var(--fs-12); color: var(--ink-3); line-height: 1.5; }

/* overview: strata and hero --------------------------------------------------- */
.strata-a {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--gutter);
  margin-bottom: var(--gap-section);
}
.hero-value {
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: 1.1;
  margin: 6px 0 4px;
}
.hero-delta { font-size: var(--fs-13); color: var(--ink-2); }
.hero-basis { font-size: var(--fs-13); color: var(--ink-3); margin-top: 4px; }
.hero-cost {
  font-size: var(--fs-13);
  color: var(--ink-3);
  margin-top: var(--sp-2);
  display: flex;
  align-items: baseline;
  gap: var(--sp-1);
}
.tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gutter);
}
.tiles .card + .card { margin-top: 0; }
.stat-tile .spark { display: block; margin-top: var(--sp-1); }
.dir.up { color: var(--status-good); }
.dir.down { color: var(--status-critical); }

/* status strip ---------------------------------------------------------------- */
.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  margin-bottom: var(--gap-section);
}
.status-strip a { text-decoration: none; }
.status-strip a:hover { background: var(--raised); }
.chip-status-plain {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-12);
  color: var(--ink-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 2px 9px;
  white-space: nowrap;
}

/* strata c: activity + changelog ---------------------------------------------- */
.strata-c {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: var(--gutter);
}
.strata-c .card + .card { margin-top: 0; }
.more { font-size: var(--fs-13); }
ul.changelog { list-style: none; padding: 0; }
ul.changelog li {
  font-size: var(--fs-13);
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline);
  line-height: 1.5;
}
ul.changelog li:last-child { border-bottom: 0; }
.cl-date { color: var(--ink-3); font-size: var(--fs-12); margin-right: 4px; }
.cl-id { color: var(--ink-3); font-size: var(--fs-12); }

/* mechanisms view ------------------------------------------------------------- */
.view-head-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
}
.period {
  display: inline-flex;
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  overflow: hidden;
}
.period a {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--ink-2);
  padding: 4px 12px;
  text-decoration: none;
}
.period a + a { border-left: 1px solid var(--hairline); }
.period a:hover { background: var(--raised); color: var(--ink); }
.period a[aria-current="page"] {
  color: var(--link);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.hb-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) 72px;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 0;
}
.hb-label { font-size: var(--fs-13); color: var(--ink); }
.hb-track { height: 16px; }
.hb-fill {
  height: 16px;
  border-radius: 0 4px 4px 0;
  min-width: 1px;
}
.hb-fill.f0 { background: var(--chart-other); }
.hb-fill.f1 { background: var(--chart-1); }
.hb-fill.f2 { background: var(--chart-2); }
.hb-fill.f3 { background: var(--chart-3); }
.hb-fill.f4 { background: var(--chart-4); }
.hb-value { color: var(--ink-2); font-size: var(--fs-13); text-align: right; }
.mech-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gutter);
}
.mech-cards .card + .card { margin-top: 0; }
.key-1 { border-left-color: var(--chart-1); }
.key-2 { border-left-color: var(--chart-2); }
.key-3 { border-left-color: var(--chart-3); }
.key-4 { border-left-color: var(--chart-4); }
dl.mech-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px var(--sp-3);
  margin: 0 0 var(--sp-2);
}
dl.mech-stats > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-1);
  border-bottom: 1px solid var(--hairline);
  padding: 4px 0;
  min-width: 0;
}
dl.mech-stats dt { font-size: var(--fs-13); color: var(--ink-2); }
dl.mech-stats dd {
  margin: 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-13);
  min-width: 0;
  overflow-wrap: anywhere;
}
.mech-spark { margin: var(--sp-1) 0; }
.mech-tools { font-size: var(--fs-12); color: var(--ink-2); }

/* benchmark view --------------------------------------------------------------- */
.bench-presets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-3);
}
.preset-label { font-size: var(--fs-12); color: var(--ink-3); margin-right: var(--sp-1); }
button.preset {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--ink-2);
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 3px 10px;
  cursor: pointer;
  transition: background var(--fade);
}
button.preset:hover { background: var(--raised); color: var(--ink); }
button.preset[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--link);
}
.bench-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: var(--sp-4);
}
.bench-controls .knob-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-2);
}
.bench-controls .knob-row label,
.bench-controls .knob label { font-size: var(--fs-13); color: var(--ink-2); }
.bench-controls .knob {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 64px;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: var(--sp-2);
}
input[type="range"] { accent-color: var(--accent); width: 100%; padding: 0; }
input[type="number"] {
  font-family: var(--mono);
  font-size: var(--fs-13);
  padding: 4px 6px;
}
.bench-note { font-size: var(--fs-12); color: var(--ink-3); margin-top: var(--sp-2); }
.bench-headline .stat-value { display: block; }
.bench-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gutter);
  margin: var(--sp-2) 0;
}
.bench-fig-val { display: block; font-size: var(--fs-20); }
.bench-bar-row { grid-template-columns: 150px minmax(0, 1fr) 72px; }
.hb-fill.bench-raw { background: var(--ramp-2); }
.hb-fill.bench-wire { background: var(--ramp-4); }
.bench-gt { font-size: var(--fs-12); margin-top: var(--sp-1); }
.bench-gt.gt-ok { color: var(--ink-2); }
.bench-gt.gt-ok::before { content: "\25CF "; color: var(--status-good); font-size: 9px; }
.bench-gt.gt-bad { color: var(--ink); }
.bench-gt.gt-bad::before { content: "\25A0 "; color: var(--status-critical); font-size: 9px; }
.bench-caption { font-size: var(--fs-12); color: var(--ink-3); margin-top: var(--sp-1); }
pre.wire {
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  font-family: var(--mono);
  font-size: var(--fs-13);
  line-height: 1.5;
  padding: var(--sp-2);
  overflow-x: auto;
  margin: var(--sp-1) 0 var(--sp-2);
  max-height: 320px;
  overflow-y: auto;
}
#bench-input { font-family: var(--mono); font-size: var(--fs-13); }

/* records view ---------------------------------------------------------------- */
.view-sub {
  font-size: var(--fs-13);
  color: var(--ink-3);
  max-width: 640px;
  margin-bottom: var(--sp-2);
  line-height: 1.6;
}
button.expand {
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: var(--fs-12);
  width: 22px;
  height: 22px;
  line-height: 1;
  cursor: pointer;
}
button.expand:hover { background: var(--raised); color: var(--ink); }
.refetch-yes { color: var(--status-attention); }
dl.meta-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 4px var(--sp-3);
  margin: var(--sp-1) 0;
}
dl.meta-list > div { display: flex; gap: var(--sp-1); font-size: var(--fs-12); }
dl.meta-list dt { color: var(--ink-3); }
dl.meta-list dd { margin: 0; color: var(--ink-2); }
.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.filter-row .tool-filter { position: relative; min-width: 160px; }
.filter-row .tool-filter > .disclosure-body {
  position: absolute;
  z-index: 20;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: var(--sp-2);
  min-width: 260px;
  max-height: 300px;
  overflow-y: auto;
}
.checkgrid { display: grid; gap: 6px; }
.check { font-size: var(--fs-13); color: var(--ink-2); display: flex; gap: 6px; align-items: center; }
.check input[type="checkbox"] { accent-color: var(--accent); width: auto; }
.filter-date { font-size: var(--fs-13); color: var(--ink-2); display: inline-flex; gap: 6px; align-items: center; }
.filter-date input[type="date"] {
  width: auto;
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink);
  font-family: var(--mono);
  font-size: var(--fs-12);
  padding: 4px 8px;
}
.btn-small { padding: 5px 12px; font-size: var(--fs-12); }
.filter-clear { font-size: var(--fs-13); }
.pager {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  font-size: var(--fs-13);
}
.changelog-full .cl-entry > summary { line-height: 1.6; }
.cl-body { font-size: var(--fs-13); color: var(--ink-2); margin: var(--sp-1) 0; line-height: 1.6; }
.cl-list { font-size: var(--fs-13); color: var(--ink-2); margin: 4px 0 var(--sp-1); padding-left: 18px; }
.changelog-full > li { padding: 4px 0; border-bottom: 0; }
.changelog-full .stat-label { margin-top: var(--sp-1); }

/* system view ------------------------------------------------------------------ */
.sys-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gutter);
  margin-bottom: var(--gap-section);
}
.sys-cards .card + .card { margin-top: 0; }
dl.sys-stats { grid-template-columns: 1fr; }
.methods { max-width: 720px; }
.methods h3 { font-size: var(--fs-14); font-weight: 600; margin: var(--sp-3) 0 var(--sp-1); }
.methods p, .methods li { font-size: var(--fs-13); color: var(--ink-2); line-height: 1.65; }
.methods b { color: var(--ink); font-weight: 600; }
.methods ul { padding-left: 18px; }

/* charts ------------------------------------------------------------------ */
.chart-tip {
  position: fixed;
  z-index: 50;
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: var(--fs-12);
  font-family: var(--mono);
  padding: 5px 9px;
  pointer-events: none;
  max-width: 260px;
}
.swatch {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  vertical-align: baseline;
}
.swatch.f0 { background: var(--chart-other); }
.swatch.f1 { background: var(--chart-1); }
.swatch.f2 { background: var(--chart-2); }
.swatch.f3 { background: var(--chart-3); }
.swatch.f4 { background: var(--chart-4); }

/* narrow screens: nav collapses to a top bar --------------------------------- */
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .sidenav {
    position: static;
    height: auto;
    flex-direction: row;
    align-items: center;
    gap: var(--sp-2);
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
    padding: 10px var(--sp-2);
    overflow-x: auto;
  }
  .nav-links { flex-direction: row; gap: 4px; }
  .nav-links .nav-sep { display: none; }
  .nav-links a { border-left: 0; border-bottom: 2px solid transparent; border-radius: 0; }
  .nav-links a[aria-current="page"] { border-bottom-color: var(--accent); }
  .nav-foot { margin-top: 0; margin-left: auto; flex-direction: row; align-items: center; }
  .nav-foot .build, .nav-foot .private { display: none; }
  .strata-a, .tiles, .strata-c, .mech-cards, .bench-grid, .sys-cards { grid-template-columns: 1fr; }
  .hb-row { grid-template-columns: 130px minmax(0, 1fr) 64px; }
}

/* reduced motion ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* v3 nav groups -------------------------------------------------------------- */
.nav-group {
  font-size: var(--fs-12);
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--sp-1) 10px 2px;
  margin-top: var(--sp-1);
}
.nav-group:first-of-type { margin-top: 0; }
.nav-group > ul {
  list-style: none;
  padding: 0;
  margin: 4px 0 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-group > ul a {
  font-size: var(--fs-13);
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-2);
  padding: 5px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-chip) var(--r-chip) 0;
}
.nav-group > ul a:hover { background: var(--raised); color: var(--ink); text-decoration: none; }
.nav-group > ul a[aria-current="page"] {
  border-left-color: var(--accent);
  color: var(--link);
}
@media (max-width: 900px) {
  .nav-group { padding: 0 8px 0 0; margin-top: 0; }
  .nav-group > ul { flex-direction: row; gap: 4px; flex-wrap: wrap; }
  .nav-group > ul a { border-left: 0; padding: 4px 8px; }
}

/* v3 global filter bar ------------------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--sp-2);
  padding: var(--sp-1) 0 var(--sp-2);
  margin-bottom: var(--sp-2);
  border-bottom: 1px solid var(--hairline);
}
.fb-group {
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  padding: 4px 8px;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  align-items: center;
  margin: 0;
  min-width: 0;
}
.fb-legend {
  font-size: var(--fs-12);
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 4px 0 0;
  border: 0;
}
.fb-opt {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--ink-2);
  display: inline-flex;
  gap: 4px;
  align-items: center;
  cursor: pointer;
  white-space: nowrap;
}
.fb-opt input[type="radio"] {
  accent-color: var(--accent);
  width: auto;
  margin: 0;
}
.fb-opt:has(input:checked) { color: var(--link); }
.fb-date {
  font-size: var(--fs-12);
  color: var(--ink-2);
  display: inline-flex;
  gap: 6px;
  align-items: center;
}
.fb-date input[type="date"] {
  width: auto;
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink);
  font-family: var(--mono);
  font-size: var(--fs-12);
  padding: 4px 8px;
}
@media (max-width: 900px) {
  .filter-bar { gap: var(--sp-1); }
  .fb-group { padding: 4px 6px; }
}

/* command palette ----------------------------------------------------------- */
.cmdk-trigger {
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: var(--fs-12);
  padding: 5px 10px;
  cursor: pointer;
  align-self: flex-start;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  transition: background var(--fade);
}
.cmdk-trigger:hover { background: var(--surface); color: var(--ink); }
.cmdk-trigger[hidden] { display: none; }
.theme-toggle {
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: var(--fs-12);
  padding: 5px 10px;
  cursor: pointer;
  align-self: flex-start;
  transition: background var(--fade);
}
.theme-toggle:hover { background: var(--surface); color: var(--ink); }
.cmdk-trigger span[aria-hidden] {
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 10px;
}
dialog.cmdk {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  color: var(--ink);
  padding: 0;
  width: min(640px, 92vw);
  max-height: 80vh;
  box-shadow: 0 12px 32px rgb(0 0 0 / 0.5);
}
dialog.cmdk::backdrop { background: rgb(0 0 0 / 0.55); }
.cmdk-form {
  display: flex;
  flex-direction: column;
  padding: var(--sp-1);
  max-height: 80vh;
}
.cmdk-input {
  width: 100%;
  background: var(--raised);
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--fs-14);
  padding: 10px 12px;
}
.cmdk-input:focus { border-color: var(--accent); outline: none; }
.cmdk-list {
  list-style: none;
  padding: 0;
  margin: var(--sp-1) 0 0;
  overflow-y: auto;
  max-height: 50vh;
}
.cmdk-list li {
  padding: 8px 12px;
  font-size: var(--fs-13);
  color: var(--ink);
  cursor: pointer;
  border-radius: var(--r-chip);
  display: flex;
  justify-content: space-between;
  gap: var(--sp-2);
}
.cmdk-list li[aria-selected="true"] { background: var(--raised); }
.cmdk-list li:hover { background: var(--raised); }
.cmdk-list li .cmdk-cat {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--ink-3);
  text-transform: uppercase;
}
.cmdk-list li[hidden] { display: none; }
.cmdk-foot { font-size: var(--fs-12); color: var(--ink-3); margin: var(--sp-1) 0 4px 4px; }

/* v3 view-head row with right-side slot ------------------------------------- */
.view-head-row .right-slot {
  margin-left: auto;
  display: inline-flex;
  gap: var(--sp-1);
  align-items: center;
}

/* generic definition list reuse for sessions, audit, etc. ------------------- */
.kv-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 4px var(--sp-3); margin: var(--sp-1) 0; }
.kv-list > div { display: flex; gap: var(--sp-1); font-size: var(--fs-13); }
.kv-list dt { color: var(--ink-3); min-width: 120px; }
.kv-list dd { margin: 0; color: var(--ink); font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* timeline (sessions detail) ------------------------------------------------ */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li {
  display: grid;
  grid-template-columns: 90px 120px minmax(0, 1fr) 90px 90px;
  gap: var(--sp-2);
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: var(--fs-13);
}
.timeline > li:last-child { border-bottom: 0; }
.timeline .tl-ts { color: var(--ink-3); font-family: var(--mono); font-size: var(--fs-12); }
.timeline .tl-tool { font-family: var(--mono); }
.timeline .tl-num { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.timeline .tl-neg { color: var(--status-attention); }
@media (max-width: 900px) {
  .timeline > li { grid-template-columns: 1fr; gap: 2px; }
  .timeline .tl-num { text-align: left; }
}
.eyebrow {
  margin: 0 0 .35rem;
  color: var(--muted);
  font: 500 .72rem/1.2 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}
.dashboard-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.health-badge {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .45rem .7rem;
  font: 600 .75rem/1 var(--mono);
  text-transform: uppercase;
}
.health-badge.healthy { color: var(--good); border-color: color-mix(in srgb, var(--good) 45%, var(--border)); }
.health-badge.attention_required, .health-badge.unknown { color: var(--warn); }
.dashboard-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem 1.5rem;
  margin: -.25rem 0 1rem;
  color: var(--muted);
  font-size: .82rem;
}
.metric-grid, .savings-grid, .diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
  margin-bottom: .75rem;
}
/* Same reset .tiles/.mech-cards/.sys-cards already carry: without it the
   stacked-card margin leaks into the grid and every card but the first sits
   lower than its row. */
.metric-grid .card + .card, .savings-grid .card + .card,
.diagnostic-grid .card + .card { margin-top: 0; }
.savings-grid { grid-template-columns: 2fr 1fr 1fr; }
.metric-card, .savings-primary { display: flex; min-height: 9rem; flex-direction: column; justify-content: space-between; }
.metric-value { display: block; margin: .8rem 0 .35rem; font: 600 1.8rem/1 var(--sans); }
.metric-value.grade { font-size: 2.5rem; }
.metric-value.autonomy { max-width: 14ch; font-size: 1.05rem; line-height: 1.3; }
.metric-note, .muted { color: var(--muted); font-size: .78rem; }
.warning-card {
  display: grid;
  grid-template-columns: 1fr minmax(16rem, 38%);
  gap: 1.5rem;
  margin-bottom: .75rem;
  border-left: 3px solid var(--warn);
}
.warning-card p { margin: .45rem 0 0; }
.warning-action { color: var(--muted); }
.net-chart {
  display: flex;
  align-items: flex-end;
  height: 12rem;
  gap: clamp(2px, .6vw, 8px);
  padding-top: 1rem;
  border-bottom: 1px solid var(--border);
}
.net-bar {
  flex: 1;
  min-height: 2px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 35%, transparent));
  border-radius: 3px 3px 0 0;
}
.chart-axis { display: flex; justify-content: space-between; margin-top: .45rem; color: var(--muted); font: .72rem var(--mono); }
.diagnostic-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1fr; }
.diagnostic-links { margin-bottom: .75rem; }
.link-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .45rem .8rem; margin-top: .8rem; }
.fact-list { margin: .75rem 0 0; }
.fact-list div { display: flex; justify-content: space-between; gap: 1rem; padding: .3rem 0; border-bottom: 1px solid var(--border); }
.fact-list dt { color: var(--muted); }
.raw-report { max-height: 28rem; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; font-size: .72rem; }
.status-text { font: 500 .74rem var(--mono); text-transform: uppercase; }
.status-text.healthy { color: var(--good); }
.status-text.attention_required { color: var(--warn); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
/* Overview enrichment: executive summary, grade+score rows, coverage meter,
   sparkline, and per-card "Why" drawers. */
.exec-summary { margin-bottom: .75rem; }
.exec-summary p { margin: .5rem 0 0; max-width: 76ch; font-size: .92rem; line-height: 1.55; }
.grade-row { display: flex; align-items: baseline; gap: .6rem; }
.grade-score { color: var(--ink-2); font: 600 1.05rem/1 var(--mono); font-variant-numeric: tabular-nums; }
.meter {
  height: 6px;
  margin: .4rem 0 .5rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  overflow: hidden;
}
.meter-fill { height: 100%; border-radius: inherit; background: var(--accent); }
.sparkline { width: 100%; height: 28px; margin: .3rem 0 .2rem; }
.sparkline polyline { stroke: var(--accent); stroke-width: 1.5px; stroke-linejoin: round; stroke-linecap: round; }
details.why { margin-top: .55rem; font-size: .78rem; }
details.why summary {
  width: fit-content;
  color: var(--muted);
  font: 500 .72rem/1.2 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
  cursor: pointer;
}
details.why summary:hover, details.why[open] summary { color: var(--ink-2); }
details.why p { margin: .45rem 0 0; }
.why-list { margin: .45rem 0 0; padding: 0; list-style: none; }
.why-list li { padding: .25rem 0; border-bottom: 1px solid var(--border); color: var(--muted); }
.why-list li:last-child { border-bottom: 0; }
.why-list li .mono { color: var(--ink-2); }
.why-list li.fail, .why-list li.fail .mono { color: var(--warn); }
/* An honestly-unavailable metric is information, not an error: mute it. */
.metric-value.na { color: var(--muted); font-size: 1.1rem; font-weight: 500; }
.info-icon { width: 12px; height: 12px; margin-right: .25rem; vertical-align: -2px; }
@media (max-width: 1000px) {
  .metric-grid, .diagnostic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .savings-grid { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 650px) {
  .metric-grid, .diagnostic-grid, .warning-card { grid-template-columns: 1fr; }
  .dashboard-head { flex-direction: column; }
}

/* Phase 6 observability v2 overview: health-badge variants, trend/recent
   tables, anomaly + classification chips. Status colors carry text labels too
   (never color alone). */
.health-badge.good { color: var(--status-good); }
.health-badge.warn { color: var(--status-attention); }
.health-badge.bad  { color: var(--status-critical); }
.trend-table { width: 100%; border-collapse: collapse; font-size: var(--fs-16); margin-top: var(--gutter); }
.trend-table th, .trend-table td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--hairline); }
.trend-table th { color: var(--fade); font-weight: 500; font-size: 0.85em; text-transform: uppercase; letter-spacing: 0.04em; }
.trend-table tr:last-child td { border-bottom: none; }
.anomaly-list { list-style: none; margin: var(--gutter) 0 0; padding: 0; display: grid; gap: 6px; }
.anomaly-list li { font-size: var(--fs-16); }
.sev { display: inline-block; min-width: 4em; padding: 1px 6px; border-radius: var(--r-chip); border: 1px solid var(--hairline); font-size: 0.75em; text-transform: uppercase; letter-spacing: 0.05em; text-align: center; }
.sev-critical { color: var(--status-critical); border-color: var(--status-critical); }
.sev-warning  { color: var(--status-attention); }
.sev-info     { color: var(--fade); }
/* Confidence is its own axis, never a shade of severity. It reads as quiet
   metadata on purpose: it qualifies the claim beside it rather than competing
   with it for attention. */
.chip-confidence { display: inline-block; padding: 1px 6px; border-radius: var(--r-chip); border: 1px solid var(--hairline); font-size: 0.75em; text-transform: uppercase; letter-spacing: 0.05em; color: var(--fade); }
/* What KIND of claim a row makes, printed under the title so a reader never has
   to infer it from the wording of the summary. */
.finding-type { display: block; margin-top: 2px; font-size: 0.75em; color: var(--fade); text-transform: uppercase; letter-spacing: 0.04em; }
/* Per-type next steps. Stacked rather than inline: they are alternatives, and a
   row of comma-separated links reads as one broken sentence.
   Block links rather than a flex column: a table-cell that is ALSO a flex
   container stops contributing its content height to the row, so a four-action
   cell overflowed ~20px into the row beneath it and the links overprinted the
   next finding. Normal flow keeps the cell growing the row. */
.row-actions a { display: block; white-space: nowrap; }
.row-actions a + a { margin-top: 2px; }
.cls { display: inline-block; padding: 1px 6px; border-radius: var(--r-chip); border: 1px solid var(--hairline); font-size: 0.8em; }
.cls-optimized, .cls-pass_through_expected, .cls-expanded_expected { color: var(--status-good); }
.cls-pass_through_unexpected, .cls-expanded_unexpected { color: var(--status-attention); }
.cls-failed { color: var(--status-critical); }
.cls-unknown, .cls-diagnostic, .cls-benchmark, .cls-unclassified { color: var(--fade); }
.anomaly-row { padding: 10px 0; border-bottom: 1px solid var(--hairline); }
.anomaly-row:last-child { border-bottom: none; }
.anomaly-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.anomaly-head b { font-size: var(--fs-16); }
.inline-actions { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-top: 6px; }
.inline-actions .fb-date { font-size: 0.9em; }

/* Diagnostics: assessment-first section (blueprint §4/§5) ------------------- */
/* Tone modifiers complete the .chip-status set. Every state carries a distinct
   glyph as well as a color, so color is never the only signal (§13.3). */
.chip-status.unknown::before { content: "\25CB"; color: var(--ink-3); }
.sev-good     { color: var(--status-good); border-color: var(--status-good); }
.sev-attention { color: var(--status-attention); border-color: var(--status-attention); }
.sev-unknown  { color: var(--ink-3); }

.diag-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding-bottom: var(--sp-1);
  margin-bottom: var(--sp-3);
  border-bottom: 1px solid var(--hairline);
}
.diag-subnav a {
  font-size: var(--fs-13);
  color: var(--ink-2);
  text-decoration: none;
  padding-bottom: 6px;
  border-bottom: 2px solid transparent;
}
.diag-subnav a:hover { color: var(--ink); }
.diag-subnav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* The freshness banner sits above the verdict so a stale report cannot read as
   current. Left rule only: no fill, in keeping with the restrained surface. */
.diag-banner { border-left: 3px solid var(--status-attention); }
.diag-banner-head { margin: 0; }
.diag-banner-body { margin: var(--sp-1) 0 0; color: var(--ink-2); font-size: var(--fs-14); }

/* One dominant page assessment, then medium axes, then dense tables (§13.2). */
.assess-hero { margin-bottom: var(--sp-3); }
.assess-verdict {
  font-size: var(--fs-40);
  font-weight: 600;
  line-height: 1.1;
  margin: 6px 0 var(--sp-2);
}
.assess-counts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  margin: 0 0 var(--sp-2);
}
.assess-counts div { display: flex; flex-direction: column; gap: 2px; }
.assess-counts dt { font-size: var(--fs-13); color: var(--ink-2); }
.assess-counts dd { margin: 0; font-size: var(--fs-20); font-weight: 600; }
.assess-meta { font-size: var(--fs-12); color: var(--ink-3); margin: 0; }

.axis-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}
/* the global `.card + .card` stacking margin would offset every card after the
   first inside a grid row (same neutralizer as .tiles / .sys-cards) */
.axis-grid .card + .card { margin-top: 0; }
.axis-card p { margin: var(--sp-1) 0 0; }
.axis-headline { font-size: var(--fs-13); color: var(--ink-2); }
.axis-evidence { font-size: var(--fs-13); color: var(--ink-2); }
.axis-link { font-size: var(--fs-13); }

.attn-summary { display: block; font-size: var(--fs-13); color: var(--ink-2); margin-top: 2px; }
.card-count { font-size: var(--fs-13); color: var(--ink-3); font-weight: 400; margin-left: var(--sp-1); }

/* Readable assertions (§9.1) rather than raw check objects. */
.assert-list { list-style: none; margin: var(--sp-2) 0 0; padding: 0; }
.assert-row { padding: 10px 0; border-bottom: 1px solid var(--hairline); }
.assert-row:last-child { border-bottom: none; }
.assert-head { display: flex; align-items: center; gap: var(--sp-1); flex-wrap: wrap; margin: 0; }
.assert-detail { margin: 4px 0 0; font-size: var(--fs-14); }
.assert-expected { margin: 2px 0 0; font-size: var(--fs-12); color: var(--ink-3); }
.assert-remedy { margin: 4px 0 0; font-size: var(--fs-13); color: var(--status-attention); }
.retry-attempts { margin: 4px 0 0 var(--sp-3); padding: 0; font-size: var(--fs-13); color: var(--ink-2); }

.diag-filter { display: flex; flex-wrap: wrap; gap: var(--sp-2); align-items: flex-end; }
.diag-filter label { display: flex; flex-direction: column; gap: 4px; font-size: var(--fs-13); color: var(--ink-2); }
.diag-filter input, .diag-filter select {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 5px 8px;
  font: inherit;
  font-size: var(--fs-13);
}

@media (max-width: 900px) {
  .axis-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .axis-grid { grid-template-columns: minmax(0, 1fr); }
}

/* MCP control plane ------------------------------------------------------- */
.control-head { align-items: flex-start; }
.control-phase {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  border-left: 3px solid var(--ink-3);
}
.control-phase p { margin: 4px 0 0; max-width: 70ch; color: var(--ink-2); }
.control-grid, .profile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}
.profile-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.control-grid .card, .profile-grid .card { margin-top: 0; }
.profile-card.is-active { border-color: var(--status-good); }
.control-kv { margin: var(--sp-2) 0 0; }
.control-kv div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: 9px 0;
  border-bottom: 1px solid var(--hairline);
}
.control-kv div:last-child { border-bottom: 0; }
.control-kv dt { color: var(--ink-2); }
.control-kv dd { margin: 0; font-family: var(--font-mono); text-align: right; }
.control-kv.compact div { padding: 5px 0; }
.control-kv-wide { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--sp-4); }
.route-chain { font-family: var(--font-mono); font-size: var(--fs-16); overflow-wrap: anywhere; }
.control-form {
  display: grid;
  grid-template-columns: minmax(150px, .8fr) minmax(150px, .8fr) minmax(260px, 1.8fr);
  gap: var(--sp-2);
  align-items: end;
  margin-top: var(--sp-2);
}
.control-form label { display: flex; flex-direction: column; gap: 5px; color: var(--ink-2); font-size: var(--fs-13); }
.control-form input, .control-form select {
  min-height: 38px;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--r-chip);
  padding: 7px 10px;
  font: inherit;
}
.control-actions { display: flex; gap: var(--sp-1); grid-column: 1 / -1; }
.control-actions button:disabled { opacity: .45; cursor: not-allowed; }
.control-result { margin-top: var(--sp-3); padding-top: var(--sp-2); border-top: 1px solid var(--hairline); }
.impact-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--sp-1); }
.impact-grid div { padding: var(--sp-2); border: 1px solid var(--hairline); border-radius: var(--r-card); }
.impact-grid b, .impact-grid span { display: block; }
.impact-grid b { font-size: var(--fs-18); }
.impact-grid span { margin-top: 3px; color: var(--ink-2); font-size: var(--fs-12); }
.change-list { list-style: none; margin: var(--sp-2) 0 0; padding: 0; }
.change-list li { display: grid; grid-template-columns: minmax(180px, .8fr) minmax(0, 2fr); gap: var(--sp-2); padding: 7px 0; border-bottom: 1px solid var(--hairline); font-size: var(--fs-13); }
.change-list li span { color: var(--ink-2); overflow-wrap: anywhere; }
.control-error { color: var(--status-critical); }
.control-success { color: var(--status-good); }
.integrity-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-2); margin-top: var(--sp-2); }
.integrity-grid div { display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: var(--sp-1); }
.integrity-grid span:last-child { color: var(--ink-2); }

@media (max-width: 1000px) {
  .profile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .control-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .control-reason { grid-column: 1 / -1; }
}
@media (max-width: 680px) {
  .control-grid, .profile-grid, .control-kv-wide, .impact-grid, .integrity-grid { grid-template-columns: minmax(0, 1fr); }
  .control-form { grid-template-columns: minmax(0, 1fr); }
  .control-reason { grid-column: auto; }
  .control-phase { align-items: flex-start; flex-direction: column; }
  .change-list li { grid-template-columns: minmax(0, 1fr); }
}