:root {
  --bc-blue: #1658c9;
  --bc-blue-dark: #0d3a8a;
  --bc-green: #117740;
  --bc-amber: #cc7700;
  --bc-red: #d11a3b;
  --bc-grey-50: #f7f8fa;
  --bc-grey-100: #ebeef3;
  --bc-grey-300: #c9d0db;
  --bc-grey-600: #5e6878;
  --bc-grey-900: #1a1f2c;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius: 6px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--bc-grey-900);
  background: var(--bc-grey-50);
  line-height: 1.5;
}

header {
  background: white;
  border-bottom: 1px solid var(--bc-grey-100);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 32px;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.header-nav {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
}

.header-nav a {
  color: var(--bc-blue);
  text-decoration: none;
  font-weight: 500;
}

.header-nav a:hover {
  color: var(--bc-blue-dark);
  text-decoration: underline;
}

h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 600;
}

.header-sub {
  color: var(--bc-grey-600);
  font-weight: 400;
  margin-left: 12px;
}

.header-tagline {
  margin: 8px 0 0;
  color: var(--bc-grey-600);
  font-size: 0.9rem;
  max-width: 800px;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 32px;
}

.controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
  background: white;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--bc-grey-100);
  margin-bottom: 24px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-group label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bc-grey-600);
  font-weight: 600;
}

.control-group select {
  padding: 8px 12px;
  border: 1px solid var(--bc-grey-300);
  border-radius: var(--radius);
  background: white;
  font-size: 0.9rem;
  min-width: 200px;
  cursor: pointer;
}

.control-group select:focus {
  outline: 2px solid var(--bc-blue);
  outline-offset: -1px;
  border-color: var(--bc-blue);
}

.stats {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--bc-grey-600);
}

.scenario-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scenario-card {
  background: white;
  border: 1px solid var(--bc-grey-100);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.scenario-header {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  user-select: none;
}

.scenario-header:hover {
  background: var(--bc-grey-50);
}

.scenario-header-main {
  flex: 1;
}

.scenario-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.scenario-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.scenario-category {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}

.category--shopper-flow { background: #e8eef9; color: var(--bc-blue-dark); }
.category--merchant-setup { background: #e6f4ec; color: var(--bc-green); }
.category--merchant-ops { background: #fdf2e0; color: var(--bc-amber); }
.category--support-ops { background: #f0e6f9; color: #5a2d8a; }

.scenario-summary {
  margin: 0;
  color: var(--bc-grey-600);
  font-size: 0.9rem;
}

.scenario-badges {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  flex-wrap: wrap;
  max-width: 240px;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.badge--ready { background: #e6f4ec; color: var(--bc-green); }
.badge--partial { background: #fdf2e0; color: var(--bc-amber); }
.badge--missing { background: #fbe6ea; color: var(--bc-red); }
.badge--not-applicable { background: var(--bc-grey-100); color: var(--bc-grey-600); }
.badge--unknown { background: var(--bc-grey-100); color: var(--bc-grey-600); }

.scenario-body {
  display: none;
  border-top: 1px solid var(--bc-grey-100);
  padding: 0;
}

.scenario-card.expanded .scenario-body {
  display: block;
}

.chevron {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--bc-grey-600);
  flex-shrink: 0;
  transition: transform 0.15s;
}

.scenario-card.expanded .chevron {
  transform: rotate(90deg);
}

.scenario-meta {
  padding: 16px 24px;
  background: var(--bc-grey-50);
  border-bottom: 1px solid var(--bc-grey-100);
  font-size: 0.85rem;
  color: var(--bc-grey-600);
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 16px;
}

.scenario-meta dt {
  font-weight: 600;
  color: var(--bc-grey-900);
}

.scenario-meta dd {
  margin: 0;
}

.scenario-meta a {
  color: var(--bc-blue);
}

.surfaces {
  padding: 16px 24px;
  display: grid;
  gap: 16px;
}

.surface-card {
  border: 1px solid var(--bc-grey-100);
  border-radius: var(--radius);
  padding: 16px;
  background: white;
}

.surface-card--filtered-out {
  display: none;
}

.surface-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.surface-label {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.surface-url {
  margin-left: auto;
  font-size: 0.85rem;
}

.surface-url a {
  color: var(--bc-blue);
  text-decoration: none;
}

.surface-url a:hover { text-decoration: underline; }

.surface-description {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--bc-grey-600);
  font-style: italic;
}

.surface-script {
  margin: 0;
  padding-left: 20px;
}

.surface-script li {
  margin-bottom: 4px;
  font-size: 0.9rem;
}

.surface-guide {
  font-size: 0.9rem;
  color: var(--bc-grey-900);
  margin: 0;
}

.empty-state {
  color: var(--bc-grey-600);
  font-style: italic;
  font-size: 0.9rem;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--bc-grey-100);
  font-size: 0.85rem;
  color: var(--bc-grey-600);
}

footer code {
  background: var(--bc-grey-100);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.85em;
}

footer p { margin: 4px 0; }
footer .muted { color: var(--bc-grey-300); }

.loading {
  text-align: center;
  color: var(--bc-grey-600);
  padding: 48px;
}

a { color: var(--bc-blue); }
a:hover { color: var(--bc-blue-dark); }