/* Delta-V "bring your runs" pages: workbench, evidence, landing additions.
   Uses the existing tokens from app.css. Chart colours below passed the
   palette validator (lightness band, CVD separation, contrast) per theme. */
:root {
  --c-pre: #8aa9c8;
  --c-gp: #b5b5b5;
  --c-scr: #cc7425;
  --mock: #f5c273;
}
html[data-theme="light"] {
  --c-pre: #3d5f82;
  --c-gp: #616161;
  --c-scr: #b4600a;
  --mock: #936015;
}

/* ---------- MOCK labelling ---------- */
.mock-tag,
.badge.mock-badge {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0;
  padding: 3px 6px;
  border-radius: 4px;
  border: 1px solid var(--mock);
  color: var(--mock);
  background: transparent;
  vertical-align: middle;
  line-height: 1.3;
}
.badge.mock-badge {
  margin-left: 4px;
}
.mock-banner {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 0 0 20px;
  padding: 12px 16px;
  border: 1px solid var(--mock);
  border-radius: 8px;
  background: var(--surface);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-2);
}
.mock-banner strong {
  color: var(--text);
}
.mock-banner .mock-tag {
  flex: none;
  margin-top: 2px;
}
body:not([data-mock]) .mock-badge {
  display: none;
}
body[data-page="workbench"] #wake,
body[data-page="evidence"] #wake,
body[data-page="workbench"] .sidebar-info,
body[data-page="evidence"] .sidebar-info {
  display: none;
}

/* ---------- Charts ---------- */
/* Charts are drawn at their container's measured width (mountChart) and never
   scaled up past it, so their text renders at its specified size. */
.chart-mount {
  width: 100%;
  min-height: 280px;
}
.chart-figure {
  margin: 16px 0 0;
}
.chart-title {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.flow-chart {
  display: block;
  width: 100%;
  height: auto;
}
.flow-chart .grid {
  stroke: var(--line);
}
.flow-chart .axis,
.flow-chart .tickmark {
  stroke: var(--line-strong);
}
.flow-chart .tick {
  fill: var(--text-3);
  font: 12px "IBM Plex Mono", monospace;
}
.flow-chart .axis-label {
  fill: var(--text-2);
  font-size: 12px;
}
.flow-chart .line {
  fill: none;
  stroke-width: 2;
  stroke-linejoin: round;
}
.flow-chart .s-pre {
  --c: var(--c-pre);
}
.flow-chart .s-gp {
  --c: var(--c-gp);
}
.flow-chart .s-scr {
  --c: var(--c-scr);
}
.flow-chart .line,
.flow-chart .whisker {
  stroke: var(--c);
}
.flow-chart .whisker {
  stroke-width: 1.5;
  opacity: 0.6;
}
.flow-chart .dot {
  fill: var(--c);
  stroke: var(--bg);
  stroke-width: 1.5;
}
.flow-chart .band {
  fill: var(--c);
  opacity: 0.2;
}
.flow-chart .band.s-gp {
  opacity: 0.14;
}
.flow-chart .bound {
  fill: none;
  stroke: var(--c);
  stroke-width: 1;
  stroke-opacity: 0.55;
}
.flow-chart .obs {
  fill: var(--text);
  stroke: var(--bg);
  stroke-width: 2;
}
/* Runs whose held controls differ from the slice: hollow, so they never read as
   observations the curve should pass through. */
.flow-chart .proj {
  fill: none;
  stroke: var(--text-3);
  stroke-width: 1.5;
}
.flow-chart .nextline {
  stroke: var(--mock);
  stroke-dasharray: 4 4;
  stroke-width: 1.5;
}
.flow-chart .next-label {
  fill: var(--text-2);
  font: 600 12px "IBM Plex Mono", monospace;
}
.flow-chart .target {
  stroke: var(--text-3);
  stroke-dasharray: 2 4;
}
.flow-chart .target-label {
  fill: var(--text-2);
  font-size: 12px;
}
.flow-chart .direct {
  fill: var(--text-2);
  font-size: 12px;
}
.flow-chart .watermark {
  fill: var(--text);
  opacity: 0.07;
  font: 700 58px "IBM Plex Sans", sans-serif;
  letter-spacing: 0.12em;
  pointer-events: none;
}
.flow-chart .hit {
  fill: transparent;
}
.flow-chart .hit:hover {
  stroke: var(--text-3);
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  list-style: none;
  margin: 10px 0 0;
  padding: 16px 0;
  font-size: 12px;
  color: var(--text-2);
}
.chart-legend .swatch {
  display: inline-block;
  width: 20px;
  height: 0;
  border-top: 2px solid var(--c, var(--text-3));
  margin-right: 8px;
  vertical-align: middle;
}
.chart-legend .s-pre {
  --c: var(--c-pre);
}
.chart-legend .s-gp {
  --c: var(--c-gp);
}
.chart-legend .s-scr {
  --c: var(--c-scr);
}
.chart-legend .swatch[data-dash] {
  border-top-style: dashed;
}
.chart-legend .swatch[data-shape] {
  width: 22px;
  height: 10px;
  border-top: 0;
  background:
    linear-gradient(var(--c), var(--c)) center / 22px 2px no-repeat;
  position: relative;
}
.chart-legend .swatch[data-dash][data-shape] {
  background: repeating-linear-gradient(90deg, var(--c) 0 5px, transparent 5px 8px) center / 22px 2px no-repeat;
}
.chart-legend .swatch[data-shape]::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 1px;
  width: 8px;
  height: 8px;
  background: var(--c);
  border-radius: 50%;
}
.chart-legend .swatch[data-shape="square"]::after {
  border-radius: 0;
}
.chart-legend .swatch[data-shape="diamond"]::after {
  border-radius: 0;
  transform: rotate(45deg) scale(0.9);
}
.chart-legend .swatch.band-sw[data-shape]::after {
  display: none;
}
.chart-legend .swatch.proj-sw {
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--text-3);
  border-radius: 50%;
}
.chart-legend .swatch.obs-sw {
  width: 8px;
  height: 8px;
  border: 0;
  border-radius: 50%;
  background: var(--text);
}
.chart-legend .swatch.band-sw {
  width: 20px;
  height: 10px;
  border: 0;
  background: var(--c, var(--c-pre));
  opacity: 0.3;
}
.chart-legend .swatch.next-sw {
  border-top-color: var(--mock);
  border-top-style: dashed;
}
#flow-tip {
  position: absolute;
  z-index: 60;
  max-width: 280px;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 12px;
  line-height: 1.4;
  box-shadow: var(--shadow);
  pointer-events: none;
}

/* ---------- Shared bits ---------- */
.flow-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.flow-table th,
.flow-table td {
  padding: 10px 14px 10px 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
/* Headers carry the user's own column names, so they are shown exactly as written, never re-cased. */
.flow-table thead th {
  font: 500 13px "IBM Plex Sans", sans-serif;
  color: var(--text-3);
  white-space: nowrap;
  border-bottom-color: var(--line-strong);
}
.flow-table td.num,
.flow-table th.num {
  text-align: right;
  font-family: "IBM Plex Mono", monospace;
  font-variant-numeric: tabular-nums;
  padding-left: 14px;
}
.flow-table thead th.num {
  font-family: "IBM Plex Sans", sans-serif;
}
.flow-table tr[aria-current] td {
  color: var(--accent);
}
/* Positioned, so visually hidden header text cannot escape the scroll box and widen the page. */
.table-scroll {
  position: relative;
  max-width: 100%;
  overflow: auto;
}
.plain-list code {
  overflow-wrap: anywhere;
}
.table-scroll:focus-visible {
  outline-offset: 2px;
}
.flow-note {
  max-width: 78ch;
  color: var(--text-3);
  margin: 12px 0 0;
}
.pad {
  padding: 18px;
}

/* ---------- Workbench ---------- */
/* Stepper: quiet text steps on a hairline. State comes from the server (see stepStates). */
.wb-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  list-style: none;
  margin: 24px 0 32px;
  padding: 0;
  border-bottom: 1px solid var(--line);
}
.wb-steps button {
  width: 100%;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  text-align: left;
  padding: 10px 8px 12px 0;
  min-height: 56px;
  background: transparent;
  color: var(--text-2);
  font-size: 14px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
}
.wb-steps button:hover:not(:disabled) {
  color: var(--text);
}
.wb-steps button:disabled {
  color: var(--text-3);
  cursor: not-allowed;
}
.wb-steps button[aria-current="step"] {
  color: var(--accent);
  border-bottom-color: var(--text);
  font-weight: 500;
}
.wb-steps .n {
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  color: var(--text-3);
  font: 12px "IBM Plex Mono", monospace;
}
.wb-steps .is-done .n {
  border-color: var(--text-2);
  color: var(--text);
}
.wb-steps .is-running .n,
.wb-steps .is-stale .n {
  border-color: var(--mock);
  color: var(--mock);
}
.wb-steps .lbl {
  display: grid;
  gap: 2px;
}
.wb-steps small {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-3);
}
.mobile-step {
  display: none;
}
.wb-page-head {
  margin-bottom: 16px;
}
#wb-sub {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  font-size: 14px;
}
.scope-banner {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--text-2);
}
.state {
  font-size: 13px;
  color: var(--text-2);
}
.state::before {
  content: none;
}

/* Step content: one heading, a lede, then sections divided by hairlines (no nested cards). */
.wb-head h2 {
  margin: 0 0 8px;
  font-size: 24px;
  letter-spacing: -0.02em;
}
.wb-head h2:focus {
  outline: none;
}
.wb-lede {
  max-width: 72ch;
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.6;
}
.status-line {
  max-width: 72ch;
  margin: 0 0 24px;
  font-size: 14px;
  color: var(--text-2);
}
.wb-section {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.wb-section > h3,
.section-bar h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.section-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
}
.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
}
.entry {
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}
.entry h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.facts {
  display: grid;
  gap: 0;
  margin: 0 0 8px;
  max-width: 900px;
}
.facts > div {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.facts dt {
  font: 14px "IBM Plex Sans", sans-serif;
  color: var(--text-3);
}
.facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px 16px;
  margin-bottom: 8px;
}
.toolbar-note {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-2);
}
.table-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  margin: 16px 0 8px;
}
.table-bar .flow-note {
  margin: 0;
}

/* Explore: the figure first; a 300px controls column only when the panel can hold both. */
#wb-panel {
  container-type: inline-size;
}
.explore-main,
.explore-side {
  min-width: 0;
}
.explore-side {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}
@container (min-width: 860px) {
  .explore {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: start;
  }
  .explore-side {
    margin-top: 0;
    padding-left: 24px;
    border-left: 1px solid var(--line);
  }
}
.side-group {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 14px;
}
.side-group legend {
  padding: 0;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.side-group + .side-group {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.side-group .actions {
  margin-top: 0;
}
.chart-status {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--text-2);
}
.is-stale {
  opacity: 0.45;
  transition: opacity 0.2s;
}
.interval-help {
  margin-top: 8px;
}
.interval-help p {
  max-width: 72ch;
  font-size: 14px;
}
.wb-next-step {
  margin-top: 32px;
}

/* Fields and controls */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 4px 0 16px;
}
.field {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--text-2);
}
.field.inline {
  flex: 1 1 140px;
  max-width: 240px;
}
.toolbar-note {
  flex-basis: 100%;
}

.field input,
.field select,
.mobile-step select {
  min-height: 44px;
  padding: 8px 10px;
  color: var(--text);
  background-color: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  font: inherit;
  font-size: 14px;
  min-width: 0;
}
.field select,
.mobile-step select {
  padding-right: 40px;
}
.field input[type="range"] {
  min-height: 0;
  padding: 0;
  border: 0;
  background: none;
}
.field input[aria-invalid="true"] {
  border-color: #e5707a;
}
.field output {
  font: 14px "IBM Plex Mono", monospace;
  color: var(--text);
}
.field small {
  color: var(--text-3);
  font-size: 12px;
}
.check {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text-2);
}
.check input {
  margin-top: 3px;
  accent-color: var(--text-2);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 20px;
}
.text-link {
  color: var(--accent);
  font-size: 14px;
}
.dropzone {
  display: grid;
  gap: 10px;
  place-items: center;
  text-align: center;
  padding: 40px 20px;
  border: 1.5px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--text-2);
  font-size: 15px;
}
.dropzone.compact {
  padding: 20px;
  justify-items: start;
  text-align: left;
}
.dropzone strong {
  color: var(--text);
  font-weight: 500;
}
.dropzone.over {
  border-color: var(--text-2);
  background: var(--surface);
}
.dropzone:focus-within label.btn {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}
.dropzone label.btn {
  cursor: pointer;
}
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.issues {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-width: 900px;
}
.issues li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--surface);
}
.issues .lvl {
  flex: none;
  font-size: 14px;
  font-weight: 600;
}
.issues .error .lvl {
  color: #e5707a;
}
.issues .warn .lvl {
  color: var(--mock);
}
.issues .ok .lvl {
  color: var(--live);
}
html[data-theme="light"] .issues .error .lvl {
  color: #b3263a;
}
.progress {
  height: 6px;
  border-radius: 3px;
  background: var(--line);
  overflow: hidden;
  margin: 14px 0 6px;
}
.progress > div {
  height: 100%;
  width: 0;
  background: var(--text-2);
  transition: width 0.25s linear;
}
.chip {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 12px;
  color: var(--text-2);
}
.limits-list {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

/* Report */
.metric-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 8px 0 12px;
}
.metric-strip > div {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: 16px 16px 16px 0;
}
.metric-strip > div + div {
  padding-left: 16px;
  border-left: 1px solid var(--line);
}
.metric-strip span {
  font-size: 13px;
  color: var(--text-3);
}
.metric-strip strong {
  font: 500 22px "IBM Plex Sans", sans-serif;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.metric-strip small {
  font-size: 12px;
  color: var(--text-3);
}
.ledger th[scope="row"] {
  color: var(--text);
  font: 14px "IBM Plex Sans", sans-serif;
  white-space: nowrap;
}
.ledger td:last-child {
  color: var(--text-2);
  font-size: 13px;
  min-width: 240px;
}
.scenario {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}
.scenario-form {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.scenario-form .actions {
  grid-column: 1 / -1;
  margin-top: 0;
}
.scenario-out .flow-table th[scope="row"] {
  color: var(--text-2);
  font: 14px "IBM Plex Sans", sans-serif;
}
.danger-zone {
  border-top-color: #e5707a55;
}
.danger-zone h3 {
  color: #e5707a;
}
html[data-theme="light"] .danger-zone h3 {
  color: #b3263a;
}
@media (max-width: 760px) {
  .entry-grid,
  .scenario,
  .scenario-form {
    grid-template-columns: 1fr;
  }
  .facts > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

/* ---------- Landing additions ---------- */
.claim-chip {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  margin: 0 0 18px;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-2);
}
.claim-chip a {
  color: var(--accent);
}
.hero-chart {
  margin: 0;
  min-width: 0;
}
.hero-chart .chart-mount {
  max-width: 520px;
}
.hero-chart .visual-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.how-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.how-card {
  padding: 24px 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  border-top: 1px solid var(--line);
}
.how-card h3 {
  font-size: 17px;
  margin: 10px 0 8px;
}
.how-card p {
  font-size: 15px;
  line-height: 1.65;
  margin: 0;
}
.example-split {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}
.example-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

@media (max-width: 1100px) {
  .wb-grid,
  .example-split {
    grid-template-columns: 1fr;
  }
  .how-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}
@media (max-width: 640px) {
  .how-grid {
    grid-template-columns: 1fr;
  }
  .wb-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .flow-chart .watermark {
    font-size: 44px;
  }
  .pad {
    padding: 14px;
  }
}

/* ---------- Workbench form bits ---------- */
.code-sample {
  margin: 8px 0 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text-2);
  font: 12px/1.6 "IBM Plex Mono", monospace;
  overflow-x: auto;
}
textarea.paste {
  width: 100%;
  padding: 10px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  font: 12px/1.5 "IBM Plex Mono", monospace;
  resize: vertical;
}

body[data-page="workbench"] .sidebar-bottom,
body[data-page="evidence"] .sidebar-bottom {
  display: none;
}
.flow-chart .target-label {
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3px;
}

/* Marks never swallow pointer events; only the larger invisible hit targets do. */
.flow-chart .line,
.flow-chart .dot,
.flow-chart .whisker,
.flow-chart .band,
.flow-chart .obs,
.flow-chart .nextline,
.flow-chart .watermark,
.flow-chart .proj,
.flow-chart .bound,
.flow-chart text {
  pointer-events: none;
}
.flow-chart .hit {
  pointer-events: all;
}

/* ---------- Study workflow (Tasks 10/11) ---------- */
.evidence-tag,
.data-tag {
  display: inline-block;
  font: 500 12px "IBM Plex Sans", sans-serif;
  letter-spacing: 0;
  padding: 3px 6px;
  border-radius: 4px;
  border: 1px solid var(--line-strong);
  color: var(--text-2);
  vertical-align: middle;
  line-height: 1.3;
}
.data-tag.customer_simulation {
  color: var(--text);
}
.claim-card {
  max-width: 62ch;
  margin: 0 0 18px;
  padding: 20px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 14px;
  line-height: 1.55;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.claim-card p {
  margin: 0 0 6px;
}
.claim-card .claim-qual {
  font-size: 13px;
  color: var(--text-2);
}
.claim-card a {
  font-size: 14px;
  color: var(--accent);
}
.issues .fix {
  display: block;
  font-style: normal;
  color: var(--text-2);
  margin-top: 2px;
}
.issues .fix::before {
  content: "Fix: ";
  font-weight: 600;
}
.link-btn {
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  text-align: left;
}
.job {
  margin: 16px 0;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.job p {
  margin: 0;
}
.parity-mount {
  max-width: 480px;
}
.result-split {
  display: grid;
  grid-template-columns: minmax(0, 480px) minmax(200px, 1fr);
  gap: 40px;
  align-items: start;
}
.result-notes {
  display: grid;
  gap: 0;
  margin: 16px 0 0;
}
.result-notes > div {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.result-notes dt {
  font: 13px "IBM Plex Sans", sans-serif;
  color: var(--text-3);
}
.result-notes dd {
  margin: 2px 0 0;
  font: 500 20px "IBM Plex Sans", sans-serif;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.result-notes small {
  display: block;
  font: 400 12px "IBM Plex Sans", sans-serif;
  color: var(--text-3);
}
@media (max-width: 900px) {
  .result-split {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}
/* Predicted fields: native 64 x 64 grid, square domain, numeric colour bar under each. */
.field-maps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.field-maps figure {
  margin: 0;
  min-width: 0;
}
.field-maps canvas:not(.cbar-strip) {
  width: 100%;
  aspect-ratio: 1;
  height: auto;
  image-rendering: pixelated;
  display: block;
}
.field-maps figcaption {
  display: grid;
  gap: 4px;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-2);
}
.field-maps figcaption strong {
  font-weight: 500;
  color: var(--text);
}
.cbar-strip {
  width: 100%;
  height: 6px;
  display: block;
}
.cbar-ticks {
  display: flex;
  justify-content: space-between;
  font: 12px "IBM Plex Mono", monospace;
  color: var(--text-3);
}
.budget .eyebrow {
  margin: 0 0 6px;
}
.budget .verdict {
  margin: 8px 0;
  font-weight: 500;
  color: var(--text);
}
.flow-table td.neg {
  color: #e5707a;
}
html[data-theme="light"] .flow-table td.neg {
  color: #b3263a;
}
/* Evidence: one measured finding, one figure, then findings and limits side by side. */
.ev-lead {
  padding: 8px 0 32px;
  border-bottom: 1px solid var(--line);
}
.ev-figure {
  margin: 0 0 12px;
  font-size: 20px;
  color: var(--text);
  max-width: 40ch;
  line-height: 1.35;
}
.ev-figure strong {
  color: var(--accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.ev-qual {
  max-width: 72ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}
.ev-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.ev-section h2 {
  font-size: 22px;
  margin: 0 0 8px;
}
.ev-two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.ev-sources {
  padding: 24px 0;
}
@media (max-width: 760px) {
  .ev-two {
    grid-template-columns: 1fr;
  }
}
.btn.danger {
  border-color: #e5707a;
  color: #e5707a;
  background: transparent;
}
html[data-theme="light"] .btn.danger {
  border-color: #b3263a;
  color: #b3263a;
}
.fit-form {
  margin-top: 12px;
}
.fit-form .field {
  max-width: 420px;
}
.plain-list {
  margin: 8px 0 14px;
  padding-left: 20px;
  color: var(--text-2);
}
.plain-list li + li {
  margin-top: 4px;
}
.plain-list strong {
  color: var(--text);
}
.page-heading p,
.plain-list,
.hero-description {
  max-width: 72ch;
}
.plain-list {
  font-size: 15px;
  line-height: 1.65;
}
.flow-note,
.chart-legend {
  font-size: 13px;
  line-height: 1.6;
}
.chart-data {
  margin: 12px 0 0;
}
.chart-data summary,
details > summary {
  cursor: pointer;
  color: var(--text-2);
  font-size: 14px;
}
.chart-data .table-scroll {
  max-height: 320px;
  margin-top: 8px;
}

/* Responsive composition */
@media (max-width: 900px) {
  .workspace-content {
    padding: 24px;
  }
  .hero {
    gap: 32px;
  }
}
@media (max-width: 640px) {
  .workspace-content {
    padding: 20px 16px;
  }
  .mobile-step {
    display: grid;
    gap: 6px;
    margin: 16px 0 24px;
  }
  .wb-steps {
    display: none;
  }
  .hero {
    grid-template-columns: 1fr;
  }
  .flow-table td,
  .flow-table th {
    padding: 10px 8px;
  }
  .actions .btn {
    white-space: normal;
  }
  #run {
    position: static;
    width: 100%;
  }
}

/* ---------- Home flow strip, How it works, Research ledger, Predict ---------- */
.flow-strip h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  letter-spacing: -0.02em;
  margin: 0 0 28px;
  max-width: 24ch;
}
/* A real sequence, so the numbers carry meaning. */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  border-top: 1px solid var(--line-strong);
}
.flow-steps li {
  counter-increment: step;
  padding: 20px 24px 0 0;
}
.flow-steps li::before {
  content: counter(step);
  display: block;
  margin-bottom: 14px;
  font: 500 15px "IBM Plex Sans", sans-serif;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.flow-steps h3 {
  margin: 0 0 6px;
  font-size: 17px;
}
.flow-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}
.flow-strip-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 32px 0 0;
}
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 14px;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.site-footer nav a {
  color: var(--text-2);
}
.site-footer nav a:hover {
  color: var(--text);
}

/* Long-form pages: one reading column, sections divided by hairlines. */
.doc {
  max-width: 760px;
}
.doc-section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.doc-section h2 {
  margin: 0 0 12px;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.doc-section > p {
  font-size: 16px;
  line-height: 1.7;
  max-width: 68ch;
}
.how-flow {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 12px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-2);
}
.how-flow strong {
  color: var(--text);
  font-weight: 500;
}
.saving-grid {
  display: grid;
  gap: 16px;
  max-width: 68ch;
}
.saving-grid h3 {
  margin: 0 0 6px;
  font-size: 16px;
}
.saving-grid p {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}
#how-budget {
  margin-top: 16px;
}
/* How it works: cost and comparison tables inside the reading column. */
.how-table-title {
  margin: 28px 0 4px;
  font-size: 16px;
}
.doc-section > .how-table-note {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-3);
}
.doc-section > .table-scroll + .how-table-note {
  margin-top: 12px;
}
.how-table {
  min-width: 560px;
  line-height: 1.55;
}
.how-table tbody th[scope="row"] {
  width: 28%;
  font-weight: 500;
  color: var(--text);
}
.how-table td {
  color: var(--text-2);
}
.how-table.has-status td:last-child {
  width: 22%;
  color: var(--text);
}

/* Research ledger: number rail, question and finding, a light verdict word. */
.ledger-section {
  padding: 40px 0 8px;
  border-top: 1px solid var(--line);
  margin-top: 32px;
}
.ledger-section > h2 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.test-ledger {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}
.test-ledger li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 190px;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.t-num {
  font: 600 34px/1 "IBM Plex Sans", sans-serif;
  letter-spacing: -0.02em;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.t-body h3 {
  margin: 4px 0 8px;
  font-size: 19px;
  letter-spacing: -0.01em;
  max-width: 40ch;
}
.t-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.65;
  max-width: 70ch;
}
.t-result {
  color: var(--text);
}
.t-note {
  font-size: 13px !important;
  color: var(--text-3);
}
.t-verdict {
  justify-self: end;
  margin-top: 6px;
  font-size: 14px;
  font-weight: 500;
  text-align: right;
}
.v-good {
  color: var(--live);
}
.v-mixed {
  color: var(--mock);
}
.v-neutral {
  color: var(--text-2);
}
.stand-grid {
  display: grid;
  gap: 24px;
  margin-top: 16px;
  max-width: 76ch;
}
.stand-grid h3 {
  margin: 0 0 8px;
  font-size: 17px;
}
.earlier-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  max-width: 760px;
}
.earlier-list li {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}
.earlier-list a {
  color: var(--accent);
}
.earlier-list span {
  color: var(--text-2);
}

/* Predict: one setting in, two outcomes out, as the first thing on the step. */
.predict-box {
  padding: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  margin-bottom: 8px;
}
.predict-inputs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  gap: 16px;
  align-items: end;
  margin-bottom: 12px;
}
.predict-result {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.pr-item {
  display: grid;
  gap: 2px;
}
.pr-label {
  font-size: 14px;
  color: var(--text-2);
}
.pr-value {
  font: 600 30px/1.15 "IBM Plex Sans", sans-serif;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.pr-range {
  font-size: 14px;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 900px) {
  .flow-steps,
  .saving-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 24px;
  }
  .test-ledger li {
    grid-template-columns: 52px minmax(0, 1fr);
  }
  .t-verdict {
    grid-column: 2;
    justify-self: start;
    text-align: left;
    margin-top: -8px;
  }
  .t-num {
    font-size: 26px;
  }
  .predict-inputs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 600px) {
  .flow-steps,
  .saving-grid,
  .stand-grid,
  .predict-inputs,
  .predict-result {
    grid-template-columns: 1fr;
  }
  .earlier-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .predict-box {
    padding: 16px;
  }
}

/* Explanations under controls, user limits, verdicts */
.hint,
.field small.hint {
  display: block;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-3);
  max-width: 46ch;
}
.limits {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 32px;
  padding: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
}
.limits > .actions {
  grid-column: 1 / -1;
  margin-top: 0;
}
.limit-group {
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}
.limit-group legend {
  padding: 0;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.range-row {
  display: grid;
  grid-template-columns: minmax(80px, 1fr) minmax(0, 88px) auto minmax(0, 88px);
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--text-2);
}
.range-row label {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.range-row input {
  width: 100%;
  min-width: 0;
  min-height: 40px;
  padding: 6px 8px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  font: 14px "IBM Plex Sans", sans-serif;
  font-variant-numeric: tabular-nums;
}
.range-row .to {
  color: var(--text-3);
}
.verdict-box {
  margin: 0 0 20px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-size: 15px;
  line-height: 1.6;
  max-width: 80ch;
}
.verdict-box strong {
  display: block;
  color: var(--text);
}
.why,
.new-problem,
.confidence-note {
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-2);
}
.confidence-note {
  margin: 12px 0 0;
}
.new-problem {
  margin: -8px 0 20px;
}
.flow-table .muted {
  color: var(--text-3);
}
@media (max-width: 1000px) {
  .limits {
    grid-template-columns: 1fr;
  }
}

/* Vision graphic: two 10 x 10 run grids, one square per solver run. */
.vision {
  margin: 0;
}
.vision figcaption h2 {
  margin: 0 0 8px;
  font-size: clamp(20px, 2vw, 24px);
  letter-spacing: -0.02em;
}
.vision figcaption p {
  max-width: 64ch;
  margin: 0 0 24px;
}
.vision-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 300px));
  gap: 48px;
}
.vision-col h3 {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  margin: 0 0 12px;
  font-size: 17px;
}
.vision-col h3 span {
  font-weight: 400;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
.vision-col p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.6;
}
.run-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 4px;
  max-width: 220px;
}
.vision-tag {
  display: inline-block;
  margin: 0 0 12px !important;
  padding: 4px 10px;
  border: 1px solid var(--mock);
  border-radius: 4px;
  font-size: 13px;
  color: var(--mock);
}
.run-grid i,
.vision-key i {
  display: block;
  aspect-ratio: 1;
  border-radius: 2px;
}
.c-run {
  background: var(--text-3);
}
.c-train {
  background: var(--c-pre);
}
.c-check {
  background: var(--c-gp);
  opacity: 0.55;
}
.c-next {
  background: var(--c-scr);
}
.c-saved {
  border: 1px dashed var(--line-strong);
}
.vision-key {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--text-2);
}
.vision-key li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.vision-key i {
  width: 12px;
}
.doc-wide {
  max-width: 100%;
}
@media (max-width: 700px) {
  .vision-pair {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Predict story strip: learned from, fitted, used. A real sequence, read left to right. */
.story {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}
.story li {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: 16px 20px 16px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-2);
}
.story li + li {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}
.story strong {
  font: 600 22px/1.2 "IBM Plex Sans", sans-serif;
  letter-spacing: -0.02em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.story-count strong {
  color: var(--accent);
}
.unsure-list {
  margin: 12px 0;
  padding-left: 22px;
  display: grid;
  gap: 6px;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
#wb-unsure p {
  max-width: 76ch;
  font-size: 15px;
  line-height: 1.6;
}
@media (max-width: 700px) {
  .story {
    grid-template-columns: 1fr;
  }
  .story li + li {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

.wb-kicker {
  max-width: 80ch;
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-2);
}
.wb-kicker strong {
  font-weight: 500;
  color: var(--accent);
}

/* Next runs form: budget row first, then the range/target disclosure. */
.limits {
  display: block;
}
.limits > .limit-group {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
}
.limits > .limit-group legend {
  grid-column: 1 / -1;
}
.limits-more {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.limits-more summary .muted {
  margin-left: 8px;
  color: var(--text-3);
  font-size: 13px;
}
.limits-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
  margin-top: 16px;
}
.limits > .actions {
  margin-top: 20px;
}
@media (max-width: 760px) {
  .limits > .limit-group,
  .limits-inner {
    grid-template-columns: 1fr;
  }
}
/* Model-at-a-glance row sits under the prediction, quieter than the result. */
.story-strip .story {
  margin: 20px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 0;
}
.story-strip .story strong {
  font-size: 18px;
}
.story-strip .story li {
  padding-bottom: 0;
}
/* Home proof */
.proof-fig {
  margin: 0 0 4px !important;
  font-size: 16px;
  color: var(--text);
}
.proof-fig strong {
  color: var(--accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.proof-more {
  margin: 8px 0;
}
.proof-more p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-2);
  max-width: 60ch;
}
.hero-scope {
  margin: -8px 0 0;
  font-size: 14px;
  color: var(--text-3);
}
h1,
h2,
h3 {
  scroll-margin-top: 90px;
}
.link-btn {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
}
.findings {
  margin: 12px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  max-width: 76ch;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-2);
}
.findings strong {
  color: var(--text);
  font-weight: 500;
}
.t-how summary {
  font-size: 14px;
  margin-bottom: 6px;
}

/* Balanced headings and paragraphs without stranded last words. */
h1, h2, h3 { text-wrap: balance; }
p, li, dd, figcaption { text-wrap: pretty; }

/* Reading measure: running text stays near 70 characters, whatever the column width. */
.page p, .page li, .landing p, .landing li, .prose p, .prose li { max-width: 62ch; }
.flow-table p, .chart-legend li, .story li, .pr-item, .metric-strip p { max-width: none; }
.story-line {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2);
}
.story-line strong {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}