/**
 * RATEB — Enterprise platform architecture (pages/architecture.php)
 * Technical briefing layout; extends about-enterprise.css.
 */

body.ratib-arch-page {
  --r-bg-deep: #080c14;
  --r-bg: #0f1419;
  --arch-accent: #14b8a6;
  --arch-accent-dim: rgba(20, 184, 166, 0.12);
  --arch-border: rgba(148, 163, 184, 0.14);
  --arch-mono-line: rgba(20, 184, 166, 0.35);
}

/* Banner */
.ratib-arch-distinct-banner {
  position: relative;
  z-index: 50;
  margin: 0;
  padding: 0.8rem 0;
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.42), rgba(30, 41, 59, 0.55));
  border-bottom: 1px solid rgba(45, 212, 191, 0.28);
}

.ratib-arch-distinct-banner__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
}

.ratib-arch-distinct-banner__badge {
  flex-shrink: 0;
  padding: 0.22rem 0.65rem;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #ccfbf1;
  background: rgba(15, 118, 110, 0.5);
  border: 1px solid rgba(45, 212, 191, 0.4);
  font-family: var(--about-mono);
}

.ratib-arch-distinct-banner__text {
  flex: 1 1 14rem;
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.45;
  color: #99f6e4;
}

.ratib-arch-distinct-banner__text strong {
  color: #f0fdfa;
}

.ratib-arch-distinct-banner__link {
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: #5eead4;
  text-decoration: none;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  border: 1px solid var(--arch-border);
  font-family: var(--about-mono);
}

.ratib-arch-distinct-banner__link:hover {
  color: #fff;
  border-color: rgba(45, 212, 191, 0.55);
}

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

/* Hero */
.ratib-arch-hero {
  padding: 2rem 0 2.25rem;
  border-bottom: 1px solid var(--arch-border);
  background: linear-gradient(180deg, var(--arch-accent-dim) 0%, transparent 65%);
}

.ratib-arch-hero__grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

@media (min-width: 920px) {
  .ratib-arch-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.ratib-arch-hero__title {
  margin: 0 0 0.7rem;
  font-size: clamp(1.75rem, 3.5vw, 2.45rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.14;
  color: #f8fafc;
}

.ratib-arch-hero__lead {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.58;
  color: var(--about-muted);
  max-width: 40rem;
}

.ratib-arch-hero__stack {
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--arch-border);
  background: rgba(15, 23, 42, 0.65);
}

.ratib-arch-hero__stack-kicker {
  margin: 0 0 0.6rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--arch-accent);
}

.ratib-arch-stack-preview {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.ratib-arch-stack-preview li {
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  font-size: 0.78rem;
  color: #e2e8f0;
  background: rgba(30, 41, 59, 0.55);
  border-left: 3px solid var(--arch-accent);
}

/* Overview */
.ratib-arch-overview-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.1rem;
}

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

.ratib-arch-overview-card {
  padding: 1rem 1.05rem;
}

.ratib-arch-overview-card h3 {
  margin: 0 0 0.4rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--arch-accent);
}

.ratib-arch-overview-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--about-muted);
}

/* Layer stack */
.ratib-arch-section--layers {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.4) 0%, transparent 100%);
}

.ratib-arch-layer-stack {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: 1.15rem;
  max-width: 56rem;
}

.ratib-arch-layer-card {
  display: grid;
  gap: 0;
  padding: 0;
  overflow: hidden;
  border-left: 3px solid var(--arch-accent);
}

@media (min-width: 720px) {
  .ratib-arch-layer-card {
    grid-template-columns: 5.5rem 1fr;
  }
}

.ratib-arch-layer-card__rail {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: rgba(15, 118, 110, 0.12);
  border-bottom: 1px solid var(--arch-border);
}

@media (min-width: 720px) {
  .ratib-arch-layer-card__rail {
    flex-direction: column;
    border-bottom: none;
    border-right: 1px solid var(--arch-border);
  }
}

.ratib-arch-layer-card__order {
  font-size: 0.75rem;
  color: var(--arch-accent);
}

.ratib-arch-layer-card__icon {
  font-size: 1rem;
  color: #5eead4;
}

.ratib-arch-layer-card__body {
  padding: 0.9rem 1rem 1rem;
}

.ratib-arch-layer-card__body h3 {
  margin: 0 0 0.65rem;
  font-size: 1rem;
  color: #f1f5f9;
}

.ratib-arch-layer-dl {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.ratib-arch-layer-dl dt {
  margin: 0 0 0.2rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
}

.ratib-arch-layer-dl dd {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.48;
  color: var(--about-muted);
}

/* Isolation topology */
.ratib-arch-topology {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.15rem;
}

@media (min-width: 960px) {
  .ratib-arch-topology--isolation {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
  }
}

.ratib-arch-topology__diagram {
  padding: 1.15rem;
  border-radius: 12px;
  border: 1px solid var(--arch-border);
  background: rgba(15, 23, 42, 0.7);
  text-align: center;
}

.ratib-arch-topology__core {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.88rem;
  color: #f0fdfa;
  background: linear-gradient(90deg, rgba(20, 184, 166, 0.35), rgba(59, 130, 246, 0.25));
  border: 1px solid rgba(45, 212, 191, 0.4);
}

.ratib-arch-topology__spokes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  margin-top: 0.65rem;
}

.ratib-arch-topology__spokes span {
  padding: 0.5rem 0.25rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-family: var(--about-mono);
  color: #a7f3d0;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.28);
}

.ratib-arch-topology__caption {
  margin: 0.75rem 0 0;
  font-size: 0.7rem;
  color: #64748b;
}

.ratib-arch-pillar-grid {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 640px) {
  .ratib-arch-pillar-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ratib-arch-pillar {
  padding: 0.95rem 1rem;
}

.ratib-arch-pillar__icon {
  display: inline-flex;
  margin-bottom: 0.45rem;
  color: var(--arch-accent);
}

.ratib-arch-pillar h3 {
  margin: 0 0 0.35rem;
  font-size: 0.92rem;
  color: #f1f5f9;
}

.ratib-arch-pillar p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.48;
  color: var(--about-muted);
}

/* Event flow */
.ratib-arch-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.35rem 0.25rem;
  margin: 1rem 0 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px dashed var(--arch-mono-line);
  background: rgba(15, 23, 42, 0.45);
}

.ratib-arch-flow__step {
  flex: 1 1 8rem;
  min-width: 7rem;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--arch-border);
}

.ratib-arch-flow__step-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--arch-accent);
  margin-bottom: 0.25rem;
}

.ratib-arch-flow__step-detail {
  display: block;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--about-muted);
}

.ratib-arch-flow__arrow {
  align-self: center;
  font-size: 0.9rem;
  color: #475569;
  padding: 0 0.15rem;
}

/* Section accents */
.ratib-arch-section--telemetry {
  background: linear-gradient(180deg, rgba(6, 78, 59, 0.08) 0%, transparent 100%);
}

.ratib-arch-section--finance {
  background: linear-gradient(180deg, rgba(120, 53, 15, 0.06) 0%, transparent 100%);
}

.ratib-arch-section--governance {
  background: linear-gradient(180deg, rgba(88, 28, 135, 0.06) 0%, transparent 100%);
}

/* Deployment topology */
.ratib-arch-deploy-topology {
  max-width: 42rem;
  margin: 1.25rem auto 0;
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--arch-border);
  background: rgba(15, 23, 42, 0.55);
}

.ratib-arch-deploy-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.ratib-arch-deploy-row--clients {
  gap: 0.65rem;
}

.ratib-arch-deploy-connector {
  width: 2px;
  height: 1rem;
  margin: 0.35rem auto;
  background: linear-gradient(180deg, var(--arch-accent), rgba(59, 130, 246, 0.5));
}

.ratib-arch-deploy-connector--thick {
  height: 1.35rem;
  width: 3px;
}

.ratib-arch-deploy-node {
  padding: 0.55rem 0.85rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  text-align: center;
  border: 1px solid var(--arch-border);
  background: rgba(30, 41, 59, 0.65);
  color: #e2e8f0;
  font-family: var(--about-mono);
}

.ratib-arch-deploy-node--core {
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: #f0fdfa;
  border-color: rgba(45, 212, 191, 0.45);
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.25), rgba(59, 130, 246, 0.2));
}

.ratib-arch-deploy-node--edge {
  border-color: rgba(148, 163, 184, 0.35);
}

.ratib-arch-deploy-node--data {
  border-color: rgba(52, 211, 153, 0.35);
  color: #a7f3d0;
}

.ratib-arch-deploy-legend {
  display: grid;
  gap: 0.5rem;
  margin-top: 1.25rem;
  font-size: 0.72rem;
}

@media (min-width: 768px) {
  .ratib-arch-deploy-legend {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ratib-arch-deploy-legend__item {
  display: grid;
  gap: 0.15rem;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--arch-border);
  background: rgba(15, 23, 42, 0.4);
}

.ratib-arch-deploy-legend__item strong {
  color: #cbd5e1;
  font-weight: 600;
}

.ratib-arch-deploy-legend__item span {
  color: #64748b;
  line-height: 1.4;
}

/* Briefing */
.ratib-arch-section--briefing {
  padding-bottom: 3rem;
}

.ratib-arch-briefing {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  padding: 1.25rem 1.35rem;
  border-left: 3px solid var(--arch-accent);
}

.ratib-arch-briefing__copy h2 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  color: #f8fafc;
}

.ratib-arch-briefing__copy p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--about-muted);
  max-width: 36rem;
}

.ratib-arch-briefing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Reveal */
[data-ratib-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

[data-ratib-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-ratib-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}