:root {
  --canvas: #f3f5f8;
  --surface: #ffffff;
  --surface-soft: #f8f9fc;
  --ink: #182033;
  --muted: #667085;
  --line: #d9deea;
  --blue: #3155d9;
  --blue-soft: #eef1ff;
  --orange: #c65d21;
  --orange-soft: #fff3eb;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  background: var(--canvas);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--canvas);
}

button,
input {
  font: inherit;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(49, 85, 217, 0.28);
  outline-offset: 2px;
}

.lab-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0 28px;
}

.lab-header {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.55fr);
  gap: 44px;
  align-items: end;
  margin-bottom: 24px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.wordmark,
.kicker,
.field-label,
.metric__label,
.ledger-row__label {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.wordmark,
.kicker {
  color: var(--blue);
}

.lab-header h1 {
  max-width: 760px;
  margin: 8px 0 0;
  font-size: clamp(2.15rem, 5vw, 4.35rem);
  font-weight: 720;
  line-height: 1.02;
  letter-spacing: -0.052em;
}

.lab-header__copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 18px;
  align-items: start;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(24, 32, 51, 0.04);
}

.source-board,
.ledger,
.probe-panel {
  padding: clamp(20px, 3vw, 28px);
}

.panel__heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.panel__heading h2,
.scope-generation h2 {
  margin: 5px 0 0;
  font-size: 1.2rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.badge {
  border: 1px solid #b7c3f6;
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  background: var(--blue-soft);
}

.switch {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.78rem;
  white-space: nowrap;
  cursor: pointer;
}

.switch input {
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: var(--blue);
}

.switch--accent {
  color: var(--ink);
  font-weight: 650;
}

.selector {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid #cdd5f7;
  border-radius: 9px;
  background: var(--blue-soft);
}

.selector strong {
  font-size: 0.88rem;
}

.selector p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.45;
}

.channel-list {
  border-top: 1px solid var(--line);
}

.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.channel-row__identity {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.channel-row__name {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 7px;
  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 750;
  background: var(--blue-soft);
}

.channel-row__identity strong,
.metric strong,
.ledger-row strong,
.probe-stats strong,
.scope-generation__reading strong {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
}

.channel-row__identity strong {
  font-size: 1.35rem;
}

.stepper {
  display: grid;
  grid-template-columns: repeat(2, 42px);
  gap: 6px;
}

.button {
  min-height: 40px;
  border: 1px solid #bfc6d5;
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

.button:hover:not(:disabled) {
  border-color: #8d99b0;
  background: var(--surface-soft);
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

.button:disabled {
  color: #98a2b3;
  background: #f2f4f7;
  cursor: not-allowed;
}

.button--quiet {
  padding: 5px;
  font-size: 1.05rem;
}

.active-controls {
  margin-top: 22px;
}

.active-controls__buttons {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  gap: 8px;
  margin-top: 9px;
}

.button--step {
  color: var(--blue);
  font-size: 1.3rem;
  font-weight: 700;
}

.button--zero {
  border-color: #e8b99e;
  color: #934215;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  background: var(--orange-soft);
}

.batch-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 20px;
}

.batch-actions .button {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 3px;
  align-items: flex-start;
  text-align: left;
}

.batch-actions strong {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.batch-actions span {
  color: var(--muted);
  font-size: 0.66rem;
}

.operator {
  display: grid;
  gap: 8px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.operator input {
  width: 100%;
  border: 1px solid #bfc6d5;
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--surface);
}

.operator p {
  min-height: 1.25em;
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.75rem;
}

.reading-card {
  --level: 0;
  margin-bottom: 16px;
  border-radius: 10px;
  padding: 18px;
  color: white;
  background: var(--blue);
}

.reading-card--odd {
  background: #2847ba;
}

.reading-card__top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.reading-card__value {
  margin: 18px 0 16px;
  overflow-wrap: anywhere;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(3.2rem, 8vw, 5.4rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.075em;
  font-variant-numeric: tabular-nums;
}

.level-track {
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.24);
}

.level-track span {
  display: block;
  width: calc((var(--level) + 1) * 10%);
  height: 100%;
  border-radius: inherit;
  background: #ffc3a0;
  transition: width 160ms ease;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.metric {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--surface-soft);
}

.metric strong {
  display: block;
  margin-top: 7px;
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.trace {
  border: 1px solid #cdd5f7;
  border-radius: 9px;
  padding: 14px;
  background: var(--blue-soft);
}

.trace__line {
  display: flex;
  gap: 7px;
  align-items: center;
  flex-wrap: wrap;
}

.trace__step {
  border: 1px solid #b7c3f6;
  border-radius: 6px;
  padding: 5px 7px;
  color: #263c91;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.68rem;
  background: var(--surface);
}

.trace__step--source {
  color: var(--blue);
}

.trace__step--effect {
  border-color: #e8b99e;
  color: #934215;
}

.trace__arrow {
  color: var(--muted);
}

.trace__note {
  margin: 10px 0 0;
  color: #4e5f96;
  font-size: 0.7rem;
  line-height: 1.5;
}

.ledger-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.ledger-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(130px, auto);
  gap: 18px;
  align-items: center;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
}

.ledger-row strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
  font-size: 0.88rem;
}

.ledger-row p,
.ledger-row__pair span {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.45;
}

.ledger-row__pair {
  display: grid;
  grid-template-columns: auto auto;
  gap: 2px 9px;
  align-items: baseline;
}

.ledger-row__pair strong {
  margin: 0;
  text-align: right;
}

.probe-panel {
  margin-top: 18px;
}

.probe-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-soft);
}

.probe-stats > div {
  min-width: 0;
  padding: 12px 14px;
  border-right: 1px solid var(--line);
}

.probe-stats > div:last-child {
  border-right: 0;
}

.probe-stats span {
  display: block;
  color: var(--muted);
  font-size: 0.7rem;
}

.probe-stats strong {
  display: block;
  margin-top: 5px;
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.scope-generation {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(130px, 0.5fr) minmax(190px, 0.65fr);
  gap: 22px;
  align-items: center;
  margin-top: 14px;
  padding: 17px;
  border: 1px solid #cdd5f7;
  border-radius: 9px;
  background: var(--blue-soft);
}

.scope-generation--hidden {
  display: block;
  border-color: var(--line);
  background: var(--surface-soft);
}

.scope-generation__copy {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.5;
}

.scope-generation__reading {
  min-width: 0;
}

.scope-generation__reading span {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
}

.scope-generation__reading strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
  font-size: 1.45rem;
}

.button--arm {
  border-color: var(--blue);
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.lab-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 22px;
  padding: 16px 2px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.64rem;
  font-weight: 650;
  letter-spacing: 0.06em;
}

.lab-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .lab-shell {
    width: min(680px, calc(100% - 28px));
    padding-top: 28px;
  }

  .lab-header,
  .lab-grid {
    grid-template-columns: 1fr;
  }

  .lab-header {
    gap: 18px;
  }

  .scope-generation {
    grid-template-columns: 1fr 0.55fr;
  }

  .scope-generation > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .lab-shell {
    width: calc(100% - 20px);
    padding-top: 20px;
  }

  .lab-header h1 {
    font-size: 2.25rem;
  }

  .source-board,
  .ledger,
  .probe-panel {
    padding: 17px;
  }

  .panel__heading,
  .selector {
    align-items: flex-start;
    flex-direction: column;
  }

  .batch-actions,
  .probe-stats {
    grid-template-columns: 1fr;
  }

  .probe-stats > div {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .probe-stats > div:last-child {
    border-bottom: 0;
  }

  .probe-stats strong {
    margin-top: 0;
  }

  .scope-generation,
  .ledger-row {
    grid-template-columns: 1fr;
  }

  .scope-generation > div:first-child {
    grid-column: auto;
  }

  .ledger-row__pair strong {
    text-align: left;
  }

  .lab-footer {
    flex-direction: column;
    gap: 7px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}