.demo-main {
  position: relative;
  z-index: 1;
}

.demo-hero-panel {
  background:
    radial-gradient(circle at 18% 6%, rgba(123, 227, 106, 0.13), transparent 28%),
    radial-gradient(circle at 84% 12%, rgba(57, 208, 255, 0.12), transparent 30%),
    var(--surface-strong);
}

.demo-section,
.demo-code-section {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
}

.demo-section {
  padding: 0 0 24px;
}

.demo-code-section {
  padding: 0 0 84px;
}

.demo-shell,
.demo-code-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: 24px;
  align-items: start;
}

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

.demo-panel {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: clamp(20px, 3vw, 28px);
}

.demo-panel h2,
.demo-result-head h2 {
  margin: 8px 0 10px;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

.demo-controls h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.demo-result-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 0.38fr);
  gap: 18px;
  align-items: stretch;
}

.demo-result-head p,
.demo-status,
.demo-scenario span,
.demo-fact-grid span,
.demo-metric span,
.demo-breakdown span,
.demo-verification span {
  color: var(--text-soft);
}

.demo-scenario-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

.demo-scenario {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.demo-scenario strong,
.demo-scenario span {
  display: block;
}

.demo-scenario strong {
  margin-bottom: 4px;
}

.demo-scenario:hover,
.demo-scenario:focus-visible,
.demo-scenario.is-active {
  border-color: rgba(57, 208, 255, 0.55);
  background: rgba(57, 208, 255, 0.08);
  transform: translateY(-1px);
}

.demo-fact-grid,
.demo-metric-grid,
.demo-breakdown,
.demo-verification {
  display: grid;
  gap: 12px;
}

.demo-fact-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(130px, 100%), 1fr));
  margin: 18px 0;
}

.demo-fact-grid div,
.demo-metric,
.demo-breakdown div,
.demo-verification div,
.demo-score-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: rgba(8, 14, 28, 0.68);
  padding: 14px;
}

.demo-fact-grid strong,
.demo-metric strong,
.demo-breakdown strong,
.demo-verification strong,
.demo-score-card strong {
  display: block;
  margin-top: 4px;
  color: var(--text);
}

.demo-score-card strong {
  font-size: clamp(1.55rem, 2.8vw, 2.45rem);
  line-height: 1;
  letter-spacing: -0.05em;
  overflow-wrap: normal;
  white-space: nowrap;
}

.demo-run-button {
  width: 100%;
  border: 1px solid rgba(123, 227, 106, 0.45);
  background: rgba(123, 227, 106, 0.09);
  color: var(--text);
  cursor: pointer;
}

.demo-run-button:disabled {
  opacity: 0.64;
  cursor: wait;
}

.demo-status {
  margin: 14px 0 0;
  line-height: 1.5;
}

.demo-status.is-success {
  color: var(--accent-strong);
}

.demo-status.is-error {
  color: #ff9a9a;
}

.demo-status.is-loading {
  color: var(--accent);
}

.demo-metric-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(150px, 100%), 1fr));
  margin-top: 18px;
}

.demo-metric strong {
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  letter-spacing: -0.05em;
}

.demo-breakdown {
  grid-template-columns: repeat(auto-fit, minmax(min(160px, 100%), 1fr));
  margin-top: 12px;
}

.demo-explain {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  padding: 14px;
  border: 1px solid rgba(57, 208, 255, 0.26);
  background: rgba(57, 208, 255, 0.055);
  color: var(--text-soft);
}

.demo-explain strong {
  color: var(--text);
}

.demo-verification {
  grid-template-columns: minmax(150px, 0.7fr) minmax(120px, 0.45fr) minmax(0, 1fr);
  margin-top: 12px;
}

.demo-verification strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-trace-wrap {
  margin-top: 18px;
}

.demo-trace {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--text-soft);
}

.demo-trace li + li {
  margin-top: 6px;
}

.demo-debug-details summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
}

.demo-debug-details p {
  margin: 12px 0 0;
  color: var(--text-soft);
}

.demo-debug-details .demo-code-grid {
  margin-top: 18px;
}

@media (max-width: 1120px) {
  .demo-shell,
  .demo-code-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .demo-section,
  .demo-code-section {
    width: min(calc(100% - 32px), var(--max));
  }

  .demo-result-head,
  .demo-fact-grid,
  .demo-metric-grid,
  .demo-breakdown,
  .demo-verification {
    grid-template-columns: 1fr;
  }

  .demo-panel {
    padding: 18px;
  }
}