.adoption-grid,
.quick-start-grid,
.evidence-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.adoption-card,
.quick-step,
.evidence-profile,
.faq-item,
.demo-stage,
.guide-filter-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .18);
}

.adoption-card,
.quick-step,
.evidence-profile,
.demo-stage,
.guide-filter-panel { padding: 1.35rem; }

.quick-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.quick-step-number {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #07111f;
  background: linear-gradient(135deg, var(--green), var(--blue));
  font-weight: 900;
}

.quick-step h2,
.quick-step h3,
.adoption-card h3,
.evidence-profile h2,
.evidence-profile h3 { margin-bottom: .55rem; }

.quick-step p,
.adoption-card p,
.evidence-profile p { margin: 0; color: var(--muted); }

.boundary-callout {
  border-left: 4px solid var(--amber);
  padding: 1rem 1.1rem;
  background: rgba(251, 191, 36, .08);
}

.faq-item { overflow: clip; }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.25rem;
  font-weight: 760;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--blue);
  font-size: 1.25rem;
}
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 1.25rem 1.2rem; color: var(--muted); }

.status-legend,
.evidence-statuses,
.guide-filter-actions,
.demo-controls {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
}

.status-pill,
.guide-filter-button,
.demo-step-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .48rem .78rem;
  color: var(--muted);
  background: rgba(255,255,255,.045);
  font-weight: 720;
}

.status-pill[data-status="verified"] { color: #b8ffe1; border-color: rgba(52,211,153,.4); }
.status-pill[data-status="conditional"] { color: #ffe7a3; border-color: rgba(251,191,36,.42); }
.status-pill[data-status="observed"] { color: #c9efff; border-color: rgba(56,189,248,.42); }
.status-pill[data-status="known-issue"] { color: #ffd1d9; border-color: rgba(251,113,133,.42); }

.evidence-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: .92rem;
}
.evidence-table th,
.evidence-table td {
  padding: .7rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.evidence-table th { color: var(--subtle); }

.guide-filter-panel { margin-bottom: 1.4rem; }
.guide-search {
  width: 100%;
  min-height: 48px;
  padding: .75rem .9rem;
  color: var(--text);
  background: rgba(7,17,31,.7);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.guide-search:focus-visible { outline: 3px solid rgba(56,189,248,.35); outline-offset: 2px; }
.guide-filter-actions { margin-top: .85rem; }
.guide-filter-button { cursor: pointer; }
.guide-filter-button[aria-pressed="true"] { color: white; background: rgba(56,189,248,.16); border-color: rgba(56,189,248,.5); }
.guide-card[hidden] { display: none !important; }
.guide-result-status { margin: .85rem 0 0; color: var(--subtle); }

.demo-shell {
  display: grid;
  grid-template-columns: minmax(210px, .35fr) minmax(0, 1fr);
  gap: 1rem;
}
.demo-controls { flex-direction: column; }
.demo-step-button {
  width: 100%;
  text-align: left;
  cursor: pointer;
  border-radius: 12px;
}
.demo-step-button[aria-selected="true"] { color: white; background: rgba(139,92,246,.17); border-color: rgba(139,92,246,.5); }
.demo-panel[hidden] { display: none; }
.demo-panel figure { margin: 0; }
.demo-panel img { width: 100%; height: auto; }
.demo-panel-copy { margin-top: 1rem; color: var(--muted); }

.supply-chain-note {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.supply-chain-note > * {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.04);
}

@media (max-width: 840px) {
  .adoption-grid,
  .quick-start-grid,
  .evidence-grid,
  .faq-grid,
  .supply-chain-note { grid-template-columns: 1fr; }
  .demo-shell { grid-template-columns: 1fr; }
  .demo-controls { flex-direction: row; }
  .demo-step-button { width: auto; }
}

@media (max-width: 560px) {
  .quick-step { grid-template-columns: 1fr; }
  .evidence-table { display: block; overflow-x: auto; }
}