:root {
  --ds-ok: #166534;
  --ds-deny: #991b1b;
  --ds-warn: #9a3412;
  --ds-panel: #faf9f7;
  --ds-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

.page-demo-strait .page-hero {
  padding-top: var(--space-7);
  padding-bottom: var(--space-5);
}

.page-demo-strait .page-hero-grid {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-demo-strait .page-hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
  }
}

.ds-lede {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 58ch;
}

.ds-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-3);
}

.ds-chip {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
}

.ds-chip.is-live {
  border-color: rgba(22, 101, 52, 0.25);
  color: var(--ds-ok);
  background: rgba(22, 101, 52, 0.06);
}

.ds-context-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: var(--space-3);
  box-shadow: 0 1px 3px var(--shadow-soft);
}

.ds-context-card h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-2);
}

.ds-stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.ds-stat-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 0.9375rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.ds-stat-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.ds-stat-list span {
  color: var(--color-text-secondary);
}

.ds-layout {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .ds-layout {
    grid-template-columns: 380px 1fr;
    align-items: start;
  }
}

.ds-controls {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: var(--space-3);
  box-shadow: 0 1px 3px var(--shadow-soft);
  position: sticky;
  top: calc(var(--header-h) + 16px);
}

.ds-controls label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.ds-controls select,
.ds-controls input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  font-family: var(--font);
  font-size: 0.9375rem;
  background: var(--color-bg);
  margin-bottom: var(--space-2);
}

.ds-controls select:focus,
.ds-controls input:focus {
  outline: 2px solid var(--focus-ring);
  border-color: var(--color-accent);
}

.ds-hint {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-2);
}

.ds-actions {
  display: grid;
  gap: 8px;
  margin-top: var(--space-2);
}

.ds-actions .btn {
  width: 100%;
  justify-content: center;
}

.ds-main-panel {
  display: grid;
  gap: var(--space-3);
}

.ds-result-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.ds-result-banner.is-visible {
  display: flex;
}

.ds-result-banner.is-yes {
  border-color: rgba(22, 101, 52, 0.3);
  background: rgba(22, 101, 52, 0.05);
}

.ds-result-banner.is-no {
  border-color: rgba(153, 27, 27, 0.3);
  background: rgba(153, 27, 27, 0.05);
}

.ds-result-banner strong {
  font-size: 1rem;
  font-weight: 600;
}

.ds-result-banner span {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.ds-verdict {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 6px;
}

.ds-verdict.yes {
  background: rgba(22, 101, 52, 0.12);
  color: var(--ds-ok);
}

.ds-verdict.no {
  background: rgba(153, 27, 27, 0.12);
  color: var(--ds-deny);
}

.ds-qr-panel {
  display: none;
  text-align: center;
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.ds-qr-panel.is-visible {
  display: block;
}

.ds-qr-panel svg {
  max-width: 200px;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px;
  background: #fff;
}

.ds-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.ds-step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 1px 3px var(--shadow-soft);
}

.ds-step.is-active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(31, 75, 122, 0.15);
}

.ds-step.is-done .ds-step-marker {
  background: var(--ds-ok);
  color: #fff;
}

.ds-step.is-fail .ds-step-marker {
  background: var(--ds-deny);
  color: #fff;
}

.ds-step-head {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-family: var(--font);
  min-height: 44px;
}

.ds-step-head:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: -2px;
}

.ds-step-marker {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--color-border);
  color: var(--color-text-secondary);
}

.ds-step-copy {
  flex: 1;
  min-width: 0;
}

.ds-step-copy h3 {
  margin: 0 0 4px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.ds-step-copy p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.ds-step-sdk {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--ds-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  background: rgba(31, 75, 122, 0.07);
  padding: 2px 8px;
  border-radius: 4px;
}

.ds-step-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  transition: transform 0.15s;
  color: var(--color-text-secondary);
}

.ds-step.is-open .ds-step-chevron {
  transform: rotate(180deg);
}

.ds-step-body {
  display: none;
  border-top: 1px solid var(--color-border);
  background: #1a1a1a;
  padding: var(--space-2);
  overflow-x: auto;
}

.ds-step.is-open .ds-step-body {
  display: block;
}

.ds-step-body pre {
  margin: 0;
  font-family: var(--ds-mono);
  font-size: 0.75rem;
  line-height: 1.55;
  color: #e8e6e1;
  white-space: pre-wrap;
  word-break: break-word;
}

.ds-idle-card {
  padding: var(--space-4);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-card);
  background: var(--ds-panel);
}

.ds-idle-card p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.ds-loading .ds-controls,
.ds-loading .ds-main-panel {
  opacity: 0.55;
  pointer-events: none;
}

.ds-error {
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(153, 27, 27, 0.08);
  color: var(--ds-deny);
  font-size: 0.875rem;
  line-height: 1.5;
}

.ds-ev-section {
  padding-top: var(--space-6);
}

.ds-talk-section {
  padding-top: var(--space-6);
}

.ds-talk-grid {
  display: grid;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .ds-talk-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ds-talk-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-3);
}

.ds-talk-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
}

.ds-talk-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.ds-disclaimer {
  margin-top: var(--space-3);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.ds-fuel-item.is-rapid {
  border-color: rgba(31, 75, 122, 0.35);
  background: rgba(31, 75, 122, 0.04);
}

.ds-ev-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(31, 75, 122, 0.1);
  color: var(--color-accent);
  margin-top: 6px;
}

.ds-ev-sockets {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

@media (max-width: 1023px) {
  .ds-controls {
    position: static;
  }
}

.ds-fuel-section {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.ds-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-2);
}

.ds-source-chip {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid rgba(31, 75, 122, 0.25);
  background: rgba(31, 75, 122, 0.06);
  color: var(--color-accent);
}

.ds-trend-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-2);
}

.ds-trend-chip {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
}

.section-head p strong {
  font-weight: 600;
  color: var(--color-text);
}

.ds-fuel-layout {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .ds-fuel-layout {
    grid-template-columns: 320px 1fr;
    align-items: start;
  }
}

.ds-fuel-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: var(--space-3);
  box-shadow: 0 1px 3px var(--shadow-soft);
}

.ds-fuel-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.ds-fuel-form input,
.ds-fuel-form select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  font-family: var(--font);
  font-size: 0.9375rem;
  background: var(--color-bg);
  margin-bottom: var(--space-2);
}

.ds-fuel-form input:focus,
.ds-fuel-form select:focus {
  outline: 2px solid var(--focus-ring);
  border-color: var(--color-accent);
}

.ds-fuel-form .btn {
  width: 100%;
  margin-top: var(--space-1);
}

.ds-fuel-results {
  min-height: 120px;
}

.ds-fuel-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.ds-fuel-summary-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-2);
  text-align: center;
}

.ds-fuel-summary-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.ds-fuel-summary-stat strong {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-accent);
}

.ds-fuel-idle,
.ds-fuel-loading {
  padding: var(--space-4);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-card);
  background: var(--ds-panel);
}

.ds-fuel-loading:not([hidden]) {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 88px;
}

.ds-fuel-loading[hidden] {
  display: none !important;
}

.ds-loading-wheel {
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: ds-spin 0.75s linear infinite;
}

@keyframes ds-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-loading-wheel {
    animation: none;
    border-top-color: var(--color-accent);
    opacity: 0.85;
  }
}

.ds-fuel-idle p,
.ds-fuel-loading p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.ds-fuel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.ds-fuel-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.ds-fuel-item-brand {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  display: grid;
  place-items: center;
  overflow: hidden;
  flex-shrink: 0;
}

.ds-fuel-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  display: block;
}

.ds-fuel-fallback {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
}

.ds-fuel-item.is-cheapest {
  border-color: rgba(22, 101, 52, 0.35);
  background: rgba(22, 101, 52, 0.04);
}

.ds-fuel-item-main h3 {
  margin: 0 0 4px;
  font-size: 0.9375rem;
  font-weight: 600;
}

.ds-fuel-item-main p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.45;
}

.ds-fuel-item-price {
  text-align: right;
}

.ds-ev-section .ds-fuel-item {
  grid-template-columns: auto 1fr auto auto;
}

.ds-fuel-item-side {
  text-align: right;
  min-width: 72px;
}

.ds-fuel-item-side strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.ds-fuel-item-side span {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.ds-fuel-item-price strong {
  display: block;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.ds-fuel-item-price span {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.ds-fuel-meta {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  .ds-fuel-summary {
    grid-template-columns: 1fr;
  }
}