.bv-visual-grammar {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  scroll-margin-top: 96px;
}

.bv-token-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.bv-token {
  position: relative;
  min-height: 154px;
  padding: 16px;
  border: 1px solid rgba(74, 64, 56, 0.76);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.028), rgba(255, 255, 255, 0.006)),
    rgba(25, 22, 19, 0.62);
  overflow: hidden;
}

.bv-token-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 16px;
  color: var(--accent-deep, #eadbce);
}

.bv-token-icon svg,
.bv-rail-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.bv-token-kicker,
.bv-rail-kicker,
.bv-stage-kicker {
  margin: 0 0 8px;
  color: var(--accent, #c39a79);
  font-size: 0.68rem;
  line-height: 1.2;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.bv-token strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink, #f3ede7);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.bv-token span,
.bv-rail-item span,
.bv-stage span {
  color: var(--muted, #b2a89d);
  font-size: 0.88rem;
  line-height: 1.5;
}

.bv-longitudinal {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(260px, 0.84fr);
  gap: clamp(18px, 2.8vw, 28px);
  align-items: start;
}

.bv-signal-canvas,
.bv-engine-canvas {
  position: relative;
  min-height: 0;
  border: 1px solid rgba(74, 64, 56, 0.78);
  border-radius: 28px;
  background:
    linear-gradient(rgba(234, 219, 206, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(234, 219, 206, 0.032) 1px, transparent 1px),
    rgba(18, 16, 14, 0.46);
  background-size: 58px 58px;
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.16);
  overflow: hidden;
}

.bv-signal-canvas {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: clamp(12px, 1.8vw, 18px);
  border: 1px solid rgba(74, 64, 56, 0.66);
  border-radius: 24px;
  background:
    linear-gradient(rgba(234, 219, 206, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(234, 219, 206, 0.024) 1px, transparent 1px),
    rgba(18, 16, 14, 0.28);
  background-size: 58px 58px;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.12);
  overflow: hidden;
}

.bv-signal-svg,
.bv-engine-svg {
  display: block;
  width: 100%;
  height: auto;
}

.bv-signal-svg {
  max-width: 760px;
  margin: 0 auto;
}

.bv-signal-axis,
.bv-engine-axis {
  stroke: rgba(234, 219, 206, 0.14);
  stroke-width: 1;
}

.bv-signal-line {
  fill: none;
  stroke: rgba(195, 154, 121, 0.88);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.bv-signal-line-secondary {
  fill: none;
  stroke: rgba(158, 202, 179, 0.74);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.bv-signal-band {
  fill: rgba(195, 154, 121, 0.055);
  stroke: rgba(195, 154, 121, 0.16);
  stroke-width: 1;
}

.bv-signal-node {
  fill: #eadbce;
  stroke: rgba(18, 16, 14, 0.8);
  stroke-width: 4;
}

.bv-signal-node-muted {
  fill: rgba(158, 202, 179, 0.86);
}

.bv-signal-label,
.bv-engine-label {
  fill: var(--muted, #b2a89d);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bv-signal-callout {
  fill: rgba(28, 24, 21, 0.88);
  stroke: rgba(234, 219, 206, 0.18);
  stroke-width: 1;
}

.bv-signal-callout-text {
  fill: var(--accent-deep, #eadbce);
  font-size: 13px;
  font-weight: 500;
  text-anchor: middle;
  dominant-baseline: middle;
}

.bv-signal-trace {
  stroke-dasharray: 8 12;
  animation: bv-trace 18s linear infinite;
}

.bv-rail {
  display: grid;
  gap: 10px;
}

.bv-rail-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px;
  border: 1px solid rgba(74, 64, 56, 0.72);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.022);
}

.bv-rail-icon {
  width: 44px;
  height: 44px;
  color: var(--accent, #c39a79);
}

.bv-rail-item strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink, #f3ede7);
  font-size: 0.96rem;
  font-weight: 500;
}

.bv-engine-console {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
  align-items: start;
}

.bv-engine-section {
  scroll-margin-top: 96px;
}

.bv-engine-canvas-vertical {
  padding: clamp(18px, 3vw, 30px);
  overflow: visible;
}

.bv-engine-flow {
  position: relative;
  display: grid;
  max-width: 1040px;
  margin: 0 auto;
  gap: 14px;
}

.bv-engine-flow::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: 34px;
  left: 28px;
  width: 1px;
  background: linear-gradient(180deg, rgba(195, 154, 121, 0), rgba(195, 154, 121, 0.64), rgba(158, 202, 179, 0.48), rgba(195, 154, 121, 0));
}

.bv-flow-row {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

.bv-flow-step {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(234, 219, 206, 0.22);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01)),
    rgba(23, 20, 18, 0.96);
  color: var(--accent-deep, #eadbce);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.bv-flow-body {
  display: grid;
  grid-template-columns: minmax(180px, 0.42fr) minmax(0, 1fr);
  gap: 10px clamp(18px, 3vw, 34px);
  align-items: center;
  min-height: 116px;
  padding: clamp(18px, 2.5vw, 24px);
  border: 1px solid rgba(74, 64, 56, 0.76);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.008)),
    rgba(25, 22, 19, 0.7);
}

.bv-flow-row[data-tone="control"] .bv-flow-body,
.bv-flow-row[data-tone="control"] .bv-flow-step {
  border-color: rgba(158, 202, 179, 0.38);
  background:
    linear-gradient(180deg, rgba(158, 202, 179, 0.055), rgba(255, 255, 255, 0.008)),
    rgba(22, 34, 30, 0.72);
}

.bv-flow-row[data-tone="engine"] .bv-flow-body,
.bv-flow-row[data-tone="engine"] .bv-flow-step {
  border-color: rgba(195, 154, 121, 0.42);
  background:
    linear-gradient(180deg, rgba(195, 154, 121, 0.07), rgba(255, 255, 255, 0.008)),
    rgba(37, 28, 22, 0.74);
}

.bv-flow-row[data-tone="validation"] .bv-flow-body,
.bv-flow-row[data-tone="validation"] .bv-flow-step {
  border-color: rgba(234, 219, 206, 0.28);
  background:
    linear-gradient(180deg, rgba(234, 219, 206, 0.05), rgba(158, 202, 179, 0.025)),
    rgba(24, 23, 22, 0.78);
}

.bv-flow-body .bv-stage-kicker {
  margin-bottom: 7px;
}

.bv-flow-body strong {
  display: block;
  color: var(--ink, #f3ede7);
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  font-weight: 500;
  line-height: 1.22;
}

.bv-flow-body > span {
  color: var(--muted, #b2a89d);
  font-size: 0.93rem;
  line-height: 1.55;
}

.bv-flow-label {
  min-width: 0;
}

.bv-flow-pill {
  display: inline-flex;
  width: max-content;
  max-width: 100%;
  margin-top: 14px;
  padding: 6px 10px;
  border: 1px solid rgba(234, 219, 206, 0.18);
  border-radius: 999px;
  color: var(--accent-deep, #eadbce);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bv-engine-node {
  fill: rgba(28, 24, 21, 0.92);
  stroke: rgba(234, 219, 206, 0.18);
  stroke-width: 1.2;
}

.bv-engine-node-accent {
  fill: rgba(48, 35, 25, 0.78);
  stroke: rgba(195, 154, 121, 0.58);
}

.bv-engine-node-ok {
  fill: rgba(24, 40, 34, 0.68);
  stroke: rgba(158, 202, 179, 0.55);
}

.bv-engine-text {
  fill: var(--ink, #f3ede7);
  font-size: 14px;
  font-weight: 500;
}

.bv-engine-small {
  fill: var(--muted, #b2a89d);
  font-size: 11px;
}

.bv-engine-link {
  fill: none;
  stroke: rgba(195, 154, 121, 0.58);
  stroke-width: 2.1;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.bv-engine-link-ok {
  stroke: rgba(158, 202, 179, 0.7);
}

.bv-engine-pulse {
  fill: rgba(234, 219, 206, 0.9);
  opacity: 0.78;
}

.bv-stage-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-content: start;
}

.bv-stage {
  padding: 17px;
  border: 1px solid rgba(74, 64, 56, 0.72);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.022);
}

.bv-stage strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink, #f3ede7);
  font-size: 0.96rem;
  font-weight: 500;
}

.bv-stage span {
  font-size: 0.88rem;
  line-height: 1.5;
}

.bv-stage-meter {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  margin-top: 13px;
  color: var(--muted, #b2a89d);
  font-size: 0.78rem;
}

.bv-stage-meter i {
  display: block;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(158, 202, 179, 0.92), rgba(195, 154, 121, 0.72));
}

.bv-stage-meter span {
  color: var(--accent-deep, #eadbce);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bv-ui-kit-section {
  scroll-margin-top: 96px;
}

.bv-ui-board {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid rgba(74, 64, 56, 0.72);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.008)),
    rgba(20, 18, 16, 0.58);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.16);
  overflow: hidden;
}

.bv-ui-board::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background:
    linear-gradient(90deg, rgba(195, 154, 121, 0.11), transparent 32%, rgba(158, 202, 179, 0.08) 68%, transparent),
    linear-gradient(rgba(234, 219, 206, 0.028) 1px, transparent 1px);
  background-size: 100% 100%, 100% 44px;
  opacity: 0.75;
}

.bv-ui-board > * {
  position: relative;
  z-index: 1;
}

.bv-ui-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.bv-ui-card {
  display: grid;
  gap: 14px;
  min-height: 192px;
  padding: 16px;
  border: 1px solid rgba(234, 219, 206, 0.14);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0.01)),
    rgba(17, 15, 14, 0.66);
}

.bv-ui-card[data-tone="control"] {
  border-color: rgba(158, 202, 179, 0.34);
  background:
    linear-gradient(180deg, rgba(158, 202, 179, 0.055), rgba(255, 255, 255, 0.01)),
    rgba(17, 26, 23, 0.66);
}

.bv-ui-card[data-tone="engine"] {
  border-color: rgba(195, 154, 121, 0.34);
  background:
    linear-gradient(180deg, rgba(195, 154, 121, 0.06), rgba(255, 255, 255, 0.01)),
    rgba(30, 23, 19, 0.68);
}

.bv-ui-card[data-tone="review"] {
  border-color: rgba(234, 219, 206, 0.24);
}

.bv-ui-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.bv-ui-index,
.bv-ui-status {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid rgba(234, 219, 206, 0.16);
  border-radius: 999px;
  color: var(--accent-deep, #eadbce);
  font-size: 0.68rem;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bv-ui-index {
  justify-content: center;
  width: 38px;
}

.bv-ui-status {
  padding: 0 10px;
  color: var(--muted, #b2a89d);
}

.bv-ui-status.is-live {
  border-color: rgba(158, 202, 179, 0.34);
  color: rgba(190, 226, 207, 0.92);
}

.bv-ui-status.is-watch {
  border-color: rgba(195, 154, 121, 0.34);
  color: rgba(234, 202, 176, 0.92);
}

.bv-ui-card strong,
.bv-ui-ledger-title strong {
  display: block;
  color: var(--ink, #f3ede7);
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  font-weight: 500;
  line-height: 1.24;
}

.bv-ui-card p,
.bv-ui-ledger-row p {
  margin: 0;
  color: var(--muted, #b2a89d);
  font-size: 0.88rem;
  line-height: 1.52;
}

.bv-ui-meter {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  margin-top: auto;
  color: var(--accent-deep, #eadbce);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bv-ui-meter i {
  display: block;
  height: 7px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(158, 202, 179, 0.95), rgba(195, 154, 121, 0.76)),
    rgba(255, 255, 255, 0.08);
}

.bv-ui-chipline {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.bv-ui-chipline span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid rgba(234, 219, 206, 0.14);
  border-radius: 999px;
  color: var(--muted, #b2a89d);
  font-size: 0.72rem;
  line-height: 1;
}

.bv-ui-ledger {
  display: grid;
}

.bv-ui-ledger-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.76fr) minmax(0, 1fr) auto;
  gap: clamp(14px, 2.4vw, 26px);
  align-items: center;
  padding: 15px 0;
  border-top: 1px solid rgba(234, 219, 206, 0.1);
}

.bv-ui-ledger-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.bv-ui-ledger-row:last-child {
  padding-bottom: 0;
}

.bv-ui-ledger-kicker {
  display: block;
  margin-bottom: 6px;
  color: var(--accent, #c39a79);
  font-size: 0.68rem;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@keyframes bv-trace {
  to {
    stroke-dashoffset: -160;
  }
}

.bv-engine-caption {
  margin: 8px 0 0;
  padding: 0 2px;
  color: var(--muted, #b2a89d);
  font-size: 0.84rem;
  line-height: 1.5;
}

@media (max-width: 980px) {
  .bv-token-grid,
  .bv-longitudinal {
    grid-template-columns: 1fr;
  }

  .bv-token-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bv-flow-body,
  .bv-stage-stack,
  .bv-ui-grid,
  .bv-ui-ledger-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .bv-token-grid,
  .bv-stage-stack,
  .bv-ui-grid {
    grid-template-columns: 1fr;
  }

  .bv-signal-canvas,
  .bv-engine-canvas {
    border-radius: 22px;
  }

  .bv-rail-item {
    grid-template-columns: 1fr;
  }

  .bv-token {
    min-height: 144px;
  }

  .bv-ui-board {
    border-radius: 22px;
  }

  .bv-ui-card {
    min-height: 0;
  }
}