/* ============================================================
   BLU3 — AI page sections (ra-*)
   Used by: pages/ai.html
   Reads tokens from styles/tokens.css. Split from the former
   subpages.css (2026 refactor) for per-page loading.
   ============================================================ */

/* ============================================================
   SHARED · section heading pattern for subpages
   ============================================================ */
.ra-section__head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 24px 48px;
  margin-bottom: clamp(40px, 6vw, 72px);
}
.ra-section__head .lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.45;
  color: var(--rv-ink-2);
  max-width: 36ch;
  margin: 0;
  text-align: right;
  letter-spacing: 0.005em;
}
.ra-section__head h2 {
  margin-top: 24px;
}
@media (max-width: 880px) {
  .ra-section__head {
      grid-template-columns: 1fr;
    }
  .ra-section__head .lede { text-align: left; }
}
/* ============================================================
   AI · SAMPLE AGENTS  ·  tabs + featured/side + grid of three
   ============================================================ */
.ra-examples {
  padding-block: var(--rv-y-md);
  border-top: 1px solid var(--rv-rule);
}
.ra-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px clamp(12px, 2vw, 24px);
  padding-bottom: 24px;
  margin-bottom: clamp(28px, 3vw, 40px);
  border-bottom: 1px solid var(--rv-rule);
}
.ra-tabs__note {
  margin: 0 0 0 auto;
  align-self: center;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--rv-ink-3);
  white-space: nowrap;
}
.ra-tabs__note a {
  font-style: normal;
  color: var(--rv-blue);
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease;
}
.ra-tabs__note a:hover { border-color: currentColor; }
@media (max-width: 720px) {
  .ra-tabs__note { margin: 8px 0 0; white-space: normal; flex-basis: 100%; }
  /* the underline-on-the-rule trick only works as one row — reset it once tabs wrap */
  .ra-tabs { gap: 2px 4px; padding-bottom: 16px; }
}
.ra-tab {
  appearance: none;
  background: transparent;
  border: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0.005em;
  color: var(--rv-ink-3);
  padding: 8px 14px;
  cursor: pointer;
  position: relative;
  border-bottom: 1px solid transparent;
  margin-bottom: -25px;
  padding-bottom: 17px;
  transition: color 220ms ease, border-color 220ms ease;
}
.ra-tab:hover { color: var(--rv-ink); }
.ra-tab.on {
  color: var(--rv-ink);
  border-bottom-color: var(--rv-ink);
}
@media (max-width: 720px) {
  /* once tabs wrap, drop the negative-margin alignment so rows don't overlap */
  .ra-tab { margin-bottom: 0; padding: 7px 12px; }
}
.ra-domain { display: none; }
.ra-domain.on { display: block; }
.ra-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rv-blue);
}
/* Horizontal rail of agent cards */
.ra-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(264px, 296px);
  gap: 16px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 18px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--rv-ink-4) var(--rv-rule-soft);
  scroll-snap-type: x proximity;
}
.ra-rail::-webkit-scrollbar { height: 4px; }
.ra-rail::-webkit-scrollbar-thumb { background: var(--rv-ink-4); border-radius: 2px; }
.ra-rail::-webkit-scrollbar-track { background: var(--rv-rule-soft); }
.ra-card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px;
  border: 1px solid var(--rv-rule);
  background: var(--rv-bg);
  position: relative;
}
.ra-card--feature { background: var(--rv-bg-paper); }
.ra-card--feature::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--rv-blue);
}
.ra-card__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 2px;
}
.ra-card__id {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--rv-ink-4);
  text-transform: uppercase;
}
.ra-card__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(19px, 1.7vw, 22px);
  letter-spacing: -0.014em;
  color: var(--rv-ink);
  margin: 0;
}
.ra-card__line {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 14px;
  line-height: 1.55;
  color: var(--rv-ink-2);
  margin: 0;
}
/* DTS footer — links into the composer */
.ra-card__compose {
  margin-top: auto;
  display: block;
  text-decoration: none;
  border-top: 1px solid var(--rv-rule-soft);
  padding-top: 14px;
}
.ra-card__dts {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin: 0;
}
.ra-card__dts > div {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 10px;
  align-items: baseline;
}
.ra-card__dts dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
}
.ra-card__dts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.01em;
  color: var(--rv-ink-2);
  line-height: 1.4;
}
.ra-card__open {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 12.5px;
  color: var(--rv-ink-3);
  transition: color 200ms ease;
}
.ra-card__open .arr { font-family: var(--font-mono); transition: transform 200ms ease; }
.ra-card__compose:hover .ra-card__open { color: var(--rv-blue); }
.ra-card__compose:hover .ra-card__open .arr { transform: translateX(4px); }
/* Empty-state cards for not-yet-populated domains */
.ra-card--empty .ra-card__line { color: var(--rv-ink-3); }
.ra-card--empty .ra-card__name { color: var(--rv-ink-3); }
.ra-card__placeholder {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
  margin: 0;
}
.ra-card--empty > .ra-card__placeholder {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--rv-rule-soft);
}
@media (max-width: 880px) {
  .ra-rail { grid-auto-columns: 82%; }
}
/* ============================================================
   AI · BUILD YOUR OWN  ·  four-column builder canvas
   ============================================================ */
.ra-build {
  padding-block: var(--rv-y-md);
  border-top: 1px solid var(--rv-rule);
  background: var(--rv-bg-paper);
}
.ra-builder {
  display: grid;
  grid-template-columns: 0.85fr 1fr 1fr 1fr;
  gap: 1px;
  background: var(--rv-rule);
  border: 1px solid var(--rv-rule);
}
.ra-bcol {
  background: var(--rv-bg);
  padding: clamp(20px, 2.2vw, 28px) clamp(16px, 1.8vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ra-bcol__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.ra-bcol__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--rv-ink-4);
  text-transform: uppercase;
  font-weight: 500;
}
.ra-bcol__num--blue {
  color: var(--rv-blue);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0;
}
.ra-bcol__head h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(18px, 1.6vw, 22px);
  letter-spacing: -0.012em;
  color: var(--rv-ink);
  margin: 0;
}
.ra-bcol__sub {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--rv-ink-3);
  margin: 0 0 8px;
}
/* Pool of chips */
.ra-pool {
  display: flex;
  flex-direction: column;
  gap: 5px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.ra-chip-l {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--rv-rule);
  background: var(--rv-bg);
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.3;
  color: var(--rv-ink-2);
  cursor: default;
  transition: background 220ms ease, border-color 220ms ease, color 220ms ease;
}
.ra-chip-l:hover {
  background: var(--rv-bg-paper);
  border-color: var(--rv-ink-4);
  color: var(--rv-ink);
}
.ra-chip-l .meta {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--rv-ink-4);
  text-transform: uppercase;
  white-space: nowrap;
  flex: none;
}
.ra-chip-l.selected {
  background: #eef2fb;
  border-color: var(--rv-blue);
  color: var(--rv-ink);
  position: relative;
}
.ra-chip-l.selected::before {
  content: "✓";
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--rv-blue);
}
.ra-chip-l--ghost {
  border-style: dashed;
  color: var(--rv-ink-3);
  background: transparent;
}
/* Composed agent — wide result card */
.ra-result {
  margin-top: 16px;
  background: var(--rv-ink);
  color: #fff;
  display: grid;
  grid-template-columns: 1.4fr 1.3fr auto;
  align-items: stretch;
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(24px, 2.6vw, 36px) clamp(24px, 2.8vw, 40px);
}
.ra-result__main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}
.ra-result__role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rv-blue);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.ra-result__arrow { font-family: var(--font-display); font-size: 15px; }
.ra-result__name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 1.8vw, 24px);
  letter-spacing: -0.018em;
  margin: 0;
  color: #fff;
}
.ra-result__line {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(255,255,255,0.72);
  margin: 0;
  max-width: 46ch;
}
.ra-result__props {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
  align-content: center;
  border-left: 1px solid rgba(255,255,255,0.14);
  padding-left: clamp(24px, 3vw, 48px);
  margin: 0;
}
.ra-result__props > div { display: flex; flex-direction: column; gap: 3px; }
.ra-result__props > div:last-child { grid-column: 1 / -1; }
.ra-result__props dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.ra-result__props dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  color: rgba(255,255,255,0.85);
}
.ra-result__cta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  min-width: 184px;
}
.ra-result__btn {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  background: var(--rv-blue);
  color: #fff;
  padding: 12px 18px;
  text-align: center;
}
.ra-result__hint {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  text-align: center;
}
.ra-build__foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.5;
  color: var(--rv-ink-2);
  text-wrap: pretty;
  max-width: 70ch;
}
.ra-build__foot .b { color: var(--rv-ink); font-weight: 400; }
@media (max-width: 1100px) {
  .ra-result { grid-template-columns: 1fr; gap: 24px; }
  .ra-result__props { border-left: 0; padding-left: 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.14); }
  .ra-result__cta { min-width: 0; }
}
@media (max-width: 640px) {
  .ra-result__props { grid-template-columns: 1fr; }
}
/* ============================================================
   AI · ADOPTION BECOMES THE ROADMAP
   ============================================================ */
.ra-adopt {
  padding-block: var(--rv-y-lg) var(--rv-y-md);
  border-top: 1px solid var(--rv-rule);
}
.ra-adopt__head {
  margin-bottom: clamp(40px, 6vw, 72px);
}
.ra-adopt__head .rv-mark { margin: 0 0 28px; }
.ra-adopt__h {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  font-kerning: normal;
  color: var(--rv-ink);
  margin: 0 0 16px;
  text-wrap: balance;
}
.ra-adopt__h .blue { color: var(--rv-blue); font-weight: 400; }
.ra-adopt__sub {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(17px, 1.6vw, 21px);
  color: var(--rv-ink-3);
  margin: 0;
}
.ra-adopt__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: stretch;
}
/* The loop — horizontal timeline */
.ra-flow {
  margin-bottom: clamp(36px, 4.5vw, 64px);
}
.ra-flow__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rv-rule);
}
.ra-flow__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--rv-blue);
}
.ra-flow__lbl {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--rv-ink);
}
.ra-flow__cyc {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
}
.ra-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.ra-flow__steps li {
  position: relative;
  padding: 26px clamp(14px, 1.6vw, 22px) 0 0;
}
.ra-flow__steps li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--rv-bg);
  border: 1.5px solid var(--rv-ink-4);
  transform: translateY(-50%);
}
.ra-flow__steps li.is-key::before {
  background: var(--rv-blue);
  border-color: var(--rv-blue);
}
.ra-flow__steps li .n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--rv-blue);
  display: block;
  margin-bottom: 8px;
}
.ra-flow__steps li .t {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(15px, 1.45vw, 18px);
  line-height: 1.35;
  letter-spacing: -0.004em;
  color: var(--rv-ink);
  text-transform: lowercase;
  margin: 0;
  max-width: 18ch;
}
/* What we capture — signals */
.ra-capture {
  display: flex;
  flex-direction: column;
}
.ra-capture__lbl {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--rv-ink);
  margin: 0 0 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rv-rule);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}
.ra-capture__mark {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--rv-blue);
}
.ra-capture__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
}
.ra-signals {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.ra-signals li {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(15px, 1.45vw, 18px);
  line-height: 1;
  letter-spacing: -0.004em;
  color: var(--rv-ink);
  text-transform: lowercase;
  border: 1px solid var(--rv-rule);
  padding: 10px 15px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  transition: border-color 200ms ease;
}
.ra-signals li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--rv-blue);
  opacity: 0.55;
  flex: none;
}
.ra-signals li:hover { border-color: var(--rv-ink-4); }
.ra-capture__bridge {
  margin-top: auto;
  padding-top: clamp(28px, 3.5vw, 44px);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(15px, 1.4vw, 18px);
  letter-spacing: -0.004em;
  color: var(--rv-ink-3);
  text-transform: lowercase;
  display: flex;
  align-items: center;
  gap: 12px;
}
.ra-capture__bridge .arr {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--rv-blue);
}
/* RIGHT loop, dark panel */
.ra-loop {
  background: var(--rv-ink);
  color: #fff;
  padding: clamp(32px, 4vw, 56px) clamp(28px, 3.5vw, 48px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.ra-loop__lbl {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 16px;
  letter-spacing: 0.4em;
  text-transform: lowercase;
  color: var(--rv-blue);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.ra-loop__cyc {
  font-size: 18px;
  letter-spacing: 0;
  opacity: 0.85;
}
.ra-loop__steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.ra-loop__steps li {
  position: relative;
  display: grid;
  grid-template-columns: 60px 1fr;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
}
.ra-loop__steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 28px;
  top: calc(50% + 14px);
  height: 24px;
  width: 1px;
  background: rgba(255,255,255,0.18);
}
.ra-loop__steps li .n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--rv-blue);
}
.ra-loop__steps li .t {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(16px, 1.5vw, 19px);
  letter-spacing: -0.004em;
  color: #fff;
  text-transform: lowercase;
}
.ra-loop__foot {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.18);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 13.5px;
  color: rgba(255,255,255,0.5);
  text-align: center;
  margin-bottom: 0;
}
@media (max-width: 880px) {
  .ra-adopt__grid { grid-template-columns: 1fr; }
  .ra-flow__steps { grid-template-columns: repeat(3, 1fr); row-gap: 14px; }
}
@media (max-width: 600px) {
  /* The loop becomes a vertical timeline: one node per row on a single rail */
  .ra-flow__steps {
    grid-template-columns: 1fr;
    row-gap: 0;
    margin-left: 4px;
    border-left: 1px solid var(--rv-rule);
  }
  .ra-flow__steps li {
    padding: 2px 0 20px 26px;
  }
  .ra-flow__steps li:last-child { padding-bottom: 2px; }
  .ra-flow__steps li::before {
    top: 7px;
    left: -5px;
    transform: none;
  }
  .ra-flow__steps li .n { margin-bottom: 5px; }
  .ra-flow__steps li .t { max-width: none; }
}
/* AI variant — the wide falling-king photo (~5.5:1) fills the banner box
       edge-to-edge with `cover`, exactly like the Security chess strip: no
       letterboxing, no seams at any width. Centered so the king stays in frame. */
    .ra-banner .rs-banner__media { background: #0A0A0B; }
.ra-banner .rs-banner__media img {
      object-fit: cover;
      object-position: center;
    }
/* ---- Composer grid: foundation + three picks ------------------------ */
.ra-builder {
  grid-template-columns: 0.85fr 1fr 1fr 1fr;
}
@media (max-width: 980px) {
  .ra-builder { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .ra-builder { grid-template-columns: 1fr; }
}
/* ---- Locked substrate column ---------------------------------------- */
.ra-bcol--locked {
  background:
    linear-gradient(180deg,
      rgba(65,105,225,0.045) 0%,
      rgba(65,105,225,0.018) 60%,
      var(--rv-bg) 100%);
}
.ra-bcol__num--lock {
  color: var(--rv-blue);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0;
  font-weight: 500;
}
/* Locked chips — non-interactive, soft blue, ◆ glyph inside */
.ra-chip-l--locked {
  background: rgba(65,105,225,0.06);
  border-color: rgba(65,105,225,0.32);
  color: var(--rv-ink);
  cursor: default;
  position: relative;
  padding-left: 26px;
}
.ra-chip-l--locked:hover {
  background: rgba(65,105,225,0.08);
  border-color: var(--rv-blue);
  color: var(--rv-ink);
}
.ra-chip-l--locked::before {
  content: "◆"; /* ◆ */
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--rv-blue);
}
.ra-chip-l--locked .meta { color: var(--rv-ink-3); }
/* Small footer note inside the locked column */
.ra-bcol__foot {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rv-rule-soft);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--rv-ink-3);
}
/* ---- Loop signature line -------------------------------------------- */
.ra-adopt__sig {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin: clamp(32px, 4vw, 56px) 0 0;
  padding-top: clamp(20px, 2.5vw, 32px);
  border-top: 1px solid var(--rv-rule-soft);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(14px, 1.25vw, 17px);
  color: var(--rv-ink-3);
  text-align: center;
}
.ra-adopt__sig em { font-style: italic; }
.ra-adopt__sig-rule {
  display: inline-block;
  width: 36px;
  height: 1px;
  background: var(--rv-blue);
  flex-shrink: 0;
}
/* ============================================================
   05 · CLOSE  ·  "We run it. Your teams run with it."
   ============================================================ */
.ra-close {
  padding-block: var(--rv-y-lg);
  border-top: 1px solid var(--rv-rule);
  background: var(--rv-bg);
}
.ra-close__mark { margin: 0 0 clamp(20px, 2.4vw, 30px); }
.ra-close__head {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
  max-width: none;
  margin-bottom: clamp(28px, 3.2vw, 42px);
}
.ra-close__h {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  font-kerning: normal;
  color: var(--rv-ink);
  margin: 0;
  max-width: 15ch;
  text-wrap: balance;
}
.ra-close__h .blue { color: var(--rv-blue); font-weight: 400; }
.ra-close__h .dot { color: var(--rv-blue); font-weight: 500; }
.ra-close__lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.5;
  letter-spacing: -0.003em;
  color: var(--rv-ink-2);
  margin: 0;
  max-width: 46ch;
  text-wrap: pretty;
}
.ra-close__msg {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 1.8vw, 22px);
}
.ra-close__act {
  align-self: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(16px, 1.8vw, 20px);
}
.ra-close__act-eb {
  display: flex; align-items: center; gap: 12px; margin: 0;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--rv-ink-3);
}
.ra-close__act-eb .rule { width: 24px; height: 1px; background: var(--rv-blue); }
@media (max-width: 880px) {
  .ra-close__head { grid-template-columns: 1fr; gap: clamp(16px, 3vw, 22px); align-items: start; }
}
/* Engagement shape — 3 phases, middle one as the focal point */
.ra-close__shape {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--rv-rule);
}
.ra-phase {
  position: relative;
  padding: clamp(22px, 2.4vw, 30px) clamp(20px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-right: 1px solid var(--rv-rule);
  background: var(--rv-bg);
}
.ra-phase:last-child { border-right: 0; }
.ra-phase--mid {
  background: var(--rv-bg-paper);
}
.ra-phase--mid::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--rv-blue);
}
.ra-phase__n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--rv-blue);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.ra-phase__h {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(18px, 1.7vw, 22px);
  letter-spacing: -0.014em;
  color: var(--rv-ink);
  margin: 0;
  line-height: 1.2;
}
.ra-phase__p {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--rv-ink-2);
  margin: 0;
}
/* CTAs row */
.ra-close__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  margin-bottom: clamp(40px, 5vw, 64px);
}
@media (max-width: 880px) {
  .ra-close__shape { grid-template-columns: 1fr; }
  .ra-phase { border-right: 0; border-bottom: 1px solid var(--rv-rule); }
  .ra-phase:last-child { border-bottom: 0; }
  .ra-phase--mid::before { width: 100%; height: 2px; bottom: auto; }
}
/* ============================================================
   Dark close variant + expandable reference-architecture card
   ============================================================ */
.ra-close--dark {
  background: var(--rv-ink);
  color: var(--rv-bg);
  border-top: 0;
  position: relative;
  overflow: hidden;
}
.ra-close--dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 78% at 82% 0%, rgba(65,105,225,0.20), transparent 58%);
  pointer-events: none;
}
.ra-close--dark > .rv-wrap { position: relative; }
.ra-close--dark .ra-close__mark { color: rgba(255,255,255,0.62); }
.ra-close--dark .ra-close__mark .n { color: var(--rv-blue); }
.ra-close--dark .ra-close__mark .r { background: rgba(255,255,255,0.28); }
.ra-close--dark .ra-close__h { color: var(--rv-bg); }
.ra-close--dark .ra-close__lede { color: rgba(255,255,255,0.72); }
.ra-close--dark .ra-close__shape { border-color: rgba(255,255,255,0.14); }
.ra-close--dark .ra-phase { background: rgba(255,255,255,0.035); border-color: rgba(255,255,255,0.12); }
.ra-close--dark .ra-phase--mid { background: rgba(255,255,255,0.07); }
.ra-close--dark .ra-phase--mid::before { background: var(--rv-blue); }
.ra-close--dark .ra-phase__n { color: var(--rv-blue); }
.ra-close--dark .ra-phase__h { color: var(--rv-bg); }
.ra-close--dark .ra-phase__p { color: rgba(255,255,255,0.64); }
.ra-close--dark .ra-close__act-eb { color: rgba(255,255,255,0.55); }
/* ---- the sign-off — a real next step on the dark canvas ---- */
.ra-signoff {
  margin-top: clamp(34px, 4vw, 56px);
  padding-top: clamp(28px, 3.2vw, 44px);
  border-top: 1px solid rgba(255,255,255,0.16);
}
.ra-signoff__eb {
  display: flex; align-items: center; gap: 12px;
  margin: 0 0 clamp(16px, 1.8vw, 22px);
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}
.ra-signoff__eb .rule { width: 30px; height: 1px; background: var(--rv-blue); }
.ra-signoff__line {
  margin: 0 0 clamp(24px, 2.8vw, 36px);
  font-family: var(--font-display); font-weight: 300;
  font-size: clamp(28px, 3.6vw, 50px); line-height: 1.04;
  letter-spacing: -0.01em; font-kerning: normal; color: var(--rv-bg);
  max-width: 20ch; text-wrap: balance;
}
.ra-signoff__line .blue { color: var(--rv-blue); }
.ra-signoff__actions {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: clamp(16px, 2vw, 28px);
}
a.ra-signoff__cta {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(15px, 1.4vw, 17px); letter-spacing: -0.006em;
  color: var(--rv-ink); background: var(--rv-bg);
  border: 1px solid var(--rv-bg); border-radius: 2px;
  padding: 14px 24px; cursor: pointer;
  transition: background 220ms ease, color 220ms ease, border-color 220ms ease;
}
.ra-signoff__cta .arr { font-family: var(--font-mono); transition: transform 220ms ease; }
a.ra-signoff__cta:hover { background: var(--rv-blue); border-color: var(--rv-blue); color: var(--rv-bg); }
.ra-signoff__cta:hover .arr { transform: translateX(4px); }
a.ra-signoff__alt {
  font-family: var(--font-display); font-weight: 400; font-size: 15px;
  color: rgba(255,255,255,0.78);
  border-bottom: 1px solid rgba(255,255,255,0.28); padding-bottom: 2px;
  transition: color 200ms ease, border-color 200ms ease;
}
a.ra-signoff__alt:hover { color: var(--rv-blue); border-bottom-color: var(--rv-blue); }
.ra-signoff__note {
  font-family: var(--font-display); font-style: italic; font-weight: 300;
  font-size: 14px; color: rgba(255,255,255,0.5);
}
@media (max-width: 560px) {
  .ra-signoff__actions { gap: 14px; }
  .ra-signoff__note { width: 100%; }
}
/* Expandable reference-architecture card (analogous to the keynote plate) */
.ra-refarch {
  margin-top: clamp(28px, 3.2vw, 44px);
  border: 1px solid rgba(255,255,255,0.16);
  border-left: 2px solid var(--rv-blue);
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  overflow: hidden;
}
.ra-refarch__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 32px);
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
  color: inherit;
  font: inherit;
  padding: clamp(16px, 1.9vw, 22px) clamp(20px, 2.6vw, 34px);
}
.ra-refarch__meta { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.ra-refarch__eb {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase;
  color: rgba(255,255,255,0.66);
}
.ra-refarch__eb .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--rv-blue); flex: none; }
.ra-refarch__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 2vw, 24px);
  letter-spacing: -0.012em;
  color: var(--rv-bg);
}
.ra-refarch__sub {
  font-family: var(--font-display);
  font-style: italic; font-weight: 300;
  font-size: 13.5px; line-height: 1.4;
  color: rgba(255,255,255,0.6);
}
.ra-refarch__toggle {
  flex: none;
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--rv-blue);
  border: 1px solid rgba(65,105,225,0.5);
  border-radius: 999px;
  padding: 8px 16px;
  transition: background 200ms ease, border-color 200ms ease;
}
.ra-refarch__bar:hover .ra-refarch__toggle { background: rgba(65,105,225,0.14); border-color: var(--rv-blue); }
.ra-refarch__toggle .chev { transition: transform 320ms ease; display: inline-block; font-size: 13px; }
.ra-refarch[data-expanded="true"] .ra-refarch__toggle .chev { transform: rotate(180deg); }
/* ============================================================
   Reference-architecture · opens as a WIDESCREEN 16:9 plate
   The trigger bar stays in the dark close section; clicking it
   opens a modal whose stage holds a fixed 1280×720 canvas,
   scaled to fit (desktop) or reflowed to a scroll sheet (mobile).
   ============================================================ */
html.ra-refmodal-lock { overflow: hidden; }
.ra-refmodal {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: clamp(10px, 2vw, 30px);
  opacity: 0;
  transition: opacity 240ms ease;
}
.ra-refmodal[hidden] { display: none; }
.ra-refmodal.is-open { opacity: 1; }
.ra-refmodal__scrim {
  position: absolute; inset: 0;
  background: rgba(8, 11, 20, 0.72);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}
.ra-refmodal__dialog {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  max-width: 100%; max-height: 100%;
  background: var(--rv-bg);
  border: 1px solid var(--rv-rule);
  border-radius: 14px;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transform: translateY(10px) scale(0.99);
  transition: transform 300ms cubic-bezier(.2, .7, .2, 1);
}
.ra-refmodal.is-open .ra-refmodal__dialog { transform: none; }
.ra-refmodal__topbar {
  flex: none;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 11px clamp(14px, 1.6vw, 20px);
  background: var(--rv-bg-paper);
  border-bottom: 1px solid var(--rv-rule);
}
.ra-refmodal__eb {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--rv-ink-3);
}
.ra-refmodal__eb .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--rv-blue); flex: none; }
.ra-refmodal__close {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--rv-ink-2);
  background: var(--rv-bg);
  border: 1px solid var(--rv-rule);
  border-radius: 999px;
  padding: 7px 13px; cursor: pointer;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}
.ra-refmodal__close .x { font-size: 15px; line-height: 1; }
.ra-refmodal__close:hover { border-color: var(--rv-blue); color: var(--rv-blue-deep); background: #F2F5FC; }
.ra-refmodal__stage {
  position: relative;
  overflow: hidden;
  background: var(--rv-bg);
}
.ra-refmodal__canvas { transform-origin: top left; }
/* The 16:9 plate — fills the canvas the JS sizes to 1280×720 */
.ra-refstage {
  box-sizing: border-box;
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  gap: 13px;
  padding: 20px 26px 16px;
}
/* Slide-style header inside the plate */
.ra-refstage__head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 28px;
}
.ra-refstage__eb {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--rv-ink-3);
  margin: 0 0 7px;
}
.ra-refstage__eb .n { color: var(--rv-blue); }
.ra-refstage__eb .r { width: 30px; height: 1px; background: var(--rv-rule); display: inline-block; }
.ra-refstage__h {
  font-family: var(--font-display); font-weight: 400;
  font-size: 27px; line-height: 1.05; letter-spacing: -0.015em;
  color: var(--rv-ink); margin: 0;
}
.ra-refstage__note {
  flex: none; max-width: 330px; text-align: right;
  font-family: var(--font-display); font-style: italic; font-weight: 300;
  font-size: 13px; line-height: 1.4; color: var(--rv-ink-3);
  margin: 4px 0 0;
}
/* Flow fills the remaining height; how-strip pinned at the bottom */
.ra-refstage .ra-arch__flow {
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  flex: 1; min-height: 0; margin-top: 0;
}
.ra-refstage .ra-arch__how { margin-top: 0; }
/* Tighten interior spacing so the whole plate sits inside 16:9 */
.ra-refstage .ra-arch__col { padding: 11px 12px; gap: 5px; }
.ra-refstage .ra-arch__note { padding-bottom: 7px; margin-bottom: 2px; min-height: 2.7em; }
.ra-refstage .ra-arch__cards { gap: 6px; justify-content: flex-start; }
.ra-refstage .ra-arch__card { padding: 8px 11px; gap: 3px; }
.ra-refstage .ra-arch__cap h4 { font-size: 13.5px; }
.ra-refstage .ra-arch__servers { padding: 7px 11px; }
.ra-refstage .ra-arch__servers-lbl { margin-bottom: 4px; }
.ra-refstage .ra-arch__srv { padding: 2px 0; }
.ra-refstage .ra-arch__servers-foot { margin-top: 5px; padding-top: 5px; font-size: 11px; }
.ra-refstage .ra-arch__sys { padding: 6px 0; }
.ra-refstage .ra-arch__ctrl { padding: 6px 0; }
.ra-refstage .ra-arch__step p { font-size: 11.5px; line-height: 1.35; }
.ra-refstage .ra-arch__how {
  grid-template-columns: auto repeat(5, 1fr);
  padding: 10px 18px; gap: 6px 20px; margin-top: 0;
}
/* --- Mobile: full-screen scroll sheet, columns stacked --- */
.ra-refmodal[data-mobile="true"] { padding: 0; }
.ra-refmodal[data-mobile="true"] .ra-refmodal__dialog {
  width: 100%; height: 100%; max-height: 100%; border-radius: 0; border: 0;
}
.ra-refmodal[data-mobile="true"] .ra-refmodal__stage {
  overflow-y: auto; -webkit-overflow-scrolling: touch;
}
.ra-refmodal[data-mobile="true"] .ra-refstage {
  height: auto; padding: 18px clamp(14px, 5vw, 22px) 28px; gap: 16px;
}
.ra-refmodal[data-mobile="true"] .ra-refstage__head { flex-direction: column; gap: 8px; }
.ra-refmodal[data-mobile="true"] .ra-refstage__note { text-align: left; max-width: none; }
.ra-refmodal[data-mobile="true"] .ra-refstage__h { font-size: 23px; }
.ra-refmodal[data-mobile="true"] .ra-refstage .ra-arch__flow {
  grid-template-columns: 1fr; gap: 10px;
}
.ra-refmodal[data-mobile="true"] .ra-refstage .ra-arch__link {
  transform: rotate(90deg); width: auto; padding: 2px 0;
}
.ra-refmodal[data-mobile="true"] .ra-refstage .ra-arch__how {
  grid-template-columns: 1fr; gap: 12px;
}
@media (prefers-reduced-motion: reduce) {
  .ra-refmodal, .ra-refmodal__dialog { transition: none; }
}
/* ============================================================
   AI · ARCHITECTURE — the governed operational view
   A technology-agnostic, left-to-right flow of how every
   request travels: surface → platform → gateway → MCP →
   enterprise systems. Rendered in the 3-colour palette;
   the gateway (BLU3's control plane) is the only blue panel.
   ============================================================ */
.ra-arch {
  padding-block: clamp(40px, 4vw, 60px);
  border-top: 1px solid var(--rv-rule);
  background: var(--rv-bg);
}
/* Diagram breaks slightly wider than the text column so the five
   stages stay roomy and descriptions don't wrap — matching the
   wide, short proportions of the source diagram. */
.ra-arch .rv-wrap { max-width: 1360px; }
/* The five-stage flow + four connectors */
.ra-arch__flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
  margin-top: clamp(16px, 1.8vw, 24px);
}
/* Each stage = a soft, enclosed, lightly-tinted container */
.ra-arch__col {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  background: var(--rv-bg-paper);
  border: 1px solid var(--rv-rule);
  border-radius: 10px;
  padding: 13px clamp(11px, 1vw, 14px);
}
.ra-arch__col--platform { background: var(--rv-bg-paper); }
/* Stage label + sub-note (top of each container) */
.ra-arch__stage {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--rv-ink);
  margin: 0;
}
.ra-arch__stage .n { color: var(--rv-blue); font-variant-numeric: tabular-nums; }
.ra-arch__note {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 12px;
  line-height: 1.35;
  color: var(--rv-ink-3);
  margin: -2px 0 2px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rv-rule-soft);
  min-height: 1.4em;
}
@media (max-width: 980px) {
  .ra-arch__note { min-height: 0; }
}
/* Generic white card inside a stage */
.ra-arch__card {
  border: 1px solid var(--rv-rule);
  background: var(--rv-bg);
  border-radius: 7px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ra-arch__card h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.008em;
  color: var(--rv-ink);
  margin: 0;
}
.ra-arch__card p {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--rv-ink-2);
  margin: 0;
}
.ra-arch__tag {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
  margin-top: 2px;
}
.ra-arch__cards { display: flex; flex-direction: column; gap: 7px; flex: 1; }
/* Connector arrow cell */
.ra-arch__link {
  align-self: center;
  width: clamp(18px, 2vw, 32px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--rv-blue);
}
/* Gateway — the governed control plane (gently distinguished, not spotlit) */
.ra-arch__col--gov {
  background: #EFF3FD;
  border-color: rgba(65,105,225,0.40);
}
.ra-arch__col--gov .ra-arch__note {
  color: var(--rv-blue-deep);
  border-bottom-color: rgba(65,105,225,0.22);
}
.ra-arch__ctrl {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 0;
  border-bottom: 1px solid var(--rv-rule-soft);
}
.ra-arch__ctrl:last-child { border-bottom: 0; padding-bottom: 0; }
.ra-arch__ctrl h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 13.5px;
  color: var(--rv-ink);
  margin: 0;
}
.ra-arch__ctrl p {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--rv-ink-2);
  margin: 0;
}
/* MCP capabilities */
.ra-arch__cap h4 .k {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
  margin-left: 7px;
}
/* Example servers list */
.ra-arch__servers {
  margin-top: 2px;
  padding: 10px 12px;
  border: 1px solid var(--rv-rule);
  border-radius: 7px;
  background: var(--rv-bg);
}
.ra-arch__servers-lbl {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
  margin: 0 0 6px;
}
.ra-arch__srv {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 3px 0;
}
.ra-arch__srv .name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12.5px;
  color: var(--rv-ink);
}
.ra-arch__srv .det {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 11px;
  color: var(--rv-ink-3);
  text-align: right;
}
.ra-arch__servers-foot {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--rv-ink-3);
  margin: 8px 0 0;
  padding-top: 8px;
  border-top: 1px solid var(--rv-rule-soft);
}
/* Enterprise systems — dotted list */
.ra-arch__sys {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 7px 0;
  border-bottom: 1px solid var(--rv-rule-soft);
}
.ra-arch__sys:last-child { border-bottom: 0; padding-bottom: 0; }
.ra-arch__sys:first-child { padding-top: 2px; }
.ra-arch__sys h4 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 13.5px;
  color: var(--rv-ink);
  margin: 0;
}
.ra-arch__dot {
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--rv-blue);
  flex: none;
}
.ra-arch__sys p {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 11.5px;
  color: var(--rv-ink-3);
  margin: 0 0 0 16px;
}
/* How it works — friendly enclosed strip */
.ra-arch__how {
  margin-top: clamp(18px, 2vw, 28px);
  background: var(--rv-bg-paper);
  border: 1px solid var(--rv-rule);
  border-radius: 10px;
  padding: clamp(14px, 1.5vw, 20px) clamp(18px, 2vw, 26px);
  display: grid;
  grid-template-columns: auto repeat(5, 1fr);
  gap: clamp(14px, 1.6vw, 24px);
  align-items: start;
}
.ra-arch__how-lbl {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--rv-ink);
  margin: 0;
  padding-right: 8px;
}
.ra-arch__how-lbl .sub {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rv-ink-4);
  margin-top: 4px;
}
.ra-arch__step { display: flex; gap: 11px; align-items: flex-start; }
.ra-arch__step .n {
  flex: none;
  width: 24px; height: 24px;
  background: var(--rv-blue);
  border-radius: 999px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #fff;
}
.ra-arch__step p {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--rv-ink-2);
  margin: 0;
}
.ra-arch__step p b { color: var(--rv-ink); font-weight: 500; }
/* ---- Condensed (lite) flow: one line per stage, round-trip folded in ---- */
.ra-arch__trip {
  margin-top: auto;
  padding-top: 9px;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--rv-ink-2);
}
.ra-arch__trip b { color: var(--rv-ink); font-weight: 500; }
.ra-arch__col--gov .ra-arch__trip { color: var(--rv-blue-deep); }
.ra-arch__col--gov .ra-arch__trip b { color: var(--rv-blue-deep); }
.ra-arch__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 4px 0 0;
}
.ra-arch__chips span {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rv-blue-deep);
  background: rgba(65,105,225,0.10);
  border: 1px solid rgba(65,105,225,0.22);
  border-radius: 999px;
  padding: 3px 8px;
}
@media (max-width: 980px) {
  .ra-arch__flow { grid-template-columns: 1fr; gap: 10px; }
  .ra-arch__link { transform: rotate(90deg); padding: 4px 0; width: auto; }
  .ra-arch__how { grid-template-columns: repeat(2, 1fr); gap: 18px 24px; }
  .ra-arch__how-lbl { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .ra-arch__how { grid-template-columns: 1fr; }
}