/* Backend architecture & platform engineering page */
body.page-platform-engineering {
  padding-bottom: 3rem;
}

.pe-section-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pbs-accent, #1a8fd4);
  margin: 0 0 0.5rem;
}

.pe-section-title {
  color: var(--pbs-primary, #0d4d8c);
  margin: 0 0 0.5rem;
}

.pe-section-lead {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #3d4f5f;
  max-width: 52rem;
  margin: 0 0 1.25rem;
}

.pe-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: #b8f0c8;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  margin-bottom: 0.85rem;
}

.pe-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: pe-pulse 2s ease-in-out infinite;
}

@keyframes pe-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  50% { box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); }
}

.pe-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.15rem;
}

.pe-hero-chip {
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  line-height: 1.3;
}

.pe-section {
  padding: 1.75rem 0;
}

.pe-section-alt {
  background: var(--pbs-bg, #f4f8fc);
}

.pe-philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 768px) {
  .pe-philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pe-philosophy-card {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: var(--pbs-radius, 10px);
  padding: 1rem 1.1rem;
  background: #fff;
}

.pe-section-alt .pe-philosophy-card {
  background: #fff;
}

.pe-philosophy-card .ti,
.pe-philosophy-card .bi {
  font-size: 1.5rem;
  color: var(--pbs-accent, #1a8fd4);
  margin-bottom: 0.5rem;
  display: block;
}

.pe-philosophy-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pbs-primary, #0d4d8c);
  margin: 0 0 0.45rem;
}

.pe-philosophy-card p {
  font-size: 0.85rem;
  line-height: 1.55;
  color: #3d4f5f;
  margin: 0;
}

.pe-topology-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pe-tier {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: var(--pbs-radius, 10px);
  background: #fff;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(13, 77, 140, 0.05);
}

.pe-tier-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 768px) {
  .pe-tier-inner {
    grid-template-columns: auto 1fr;
  }
}

.pe-tier-accent {
  width: 100%;
  height: 4px;
}

@media (min-width: 768px) {
  .pe-tier-accent {
    width: 5px;
    height: auto;
    min-height: 100%;
  }
}

.pe-tier--blue .pe-tier-accent { background: #1a8fd4; }
.pe-tier--teal .pe-tier-accent { background: #0d9488; }
.pe-tier--purple .pe-tier-accent { background: #7c3aed; }
.pe-tier--amber .pe-tier-accent { background: #d97706; }
.pe-tier--coral .pe-tier-accent { background: #e11d48; }

.pe-tier-content {
  padding: 1rem 1.15rem 1.15rem;
}

@media (min-width: 768px) {
  .pe-tier-content {
    padding: 1.15rem 1.25rem 1.25rem;
  }
}

.pe-tier-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.65rem 1rem;
  margin-bottom: 0.65rem;
}

.pe-tier-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.pe-tier--blue .pe-tier-icon { background: #e6f4fc; color: #0d4d8c; }
.pe-tier--teal .pe-tier-icon { background: #ccfbf1; color: #0f766e; }
.pe-tier--purple .pe-tier-icon { background: #ede9fe; color: #6d28d9; }
.pe-tier--amber .pe-tier-icon { background: #fef3c7; color: #b45309; }
.pe-tier--coral .pe-tier-icon { background: #ffe4e6; color: #be123c; }

.pe-tier-meta {
  flex: 1;
  min-width: 200px;
}

.pe-tier-num {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pbs-muted, #5c6b7a);
  margin: 0 0 0.2rem;
}

.pe-tier-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--pbs-primary, #0d4d8c);
  margin: 0 0 0.25rem;
}

.pe-tier-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--pbs-accent, #1a8fd4);
  margin: 0;
}

.pe-tier-text {
  font-size: 0.86rem;
  line-height: 1.6;
  color: #3d4f5f;
  margin: 0 0 0.85rem;
}

.pe-tier-text + .pe-tier-text {
  margin-top: 0.65rem;
}

.pe-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.pe-chip {
  font-size: 0.72rem;
  font-weight: 600;
  color: #3d4f5f;
  background: var(--pbs-bg, #f4f8fc);
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: 999px;
  padding: 0.28rem 0.6rem;
  line-height: 1.3;
}

.pe-service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  margin: 1rem 0 0.85rem;
}

@media (min-width: 576px) {
  .pe-service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .pe-service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pe-service-card {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: 8px;
  padding: 0.85rem;
  background: #fafcfe;
}

.pe-service-card .ti,
.pe-service-card .bi {
  font-size: 1.2rem;
  color: #6d28d9;
  margin-bottom: 0.35rem;
  display: block;
}

.pe-service-card strong {
  display: block;
  font-size: 0.82rem;
  color: var(--pbs-primary, #0d4d8c);
  margin-bottom: 0.25rem;
}

.pe-service-card p {
  font-size: 0.78rem;
  line-height: 1.45;
  color: #3d4f5f;
  margin: 0;
}

.pe-compact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  margin: 0.85rem 0;
}

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

.pe-compact-item {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: 8px;
  padding: 0.7rem 0.85rem;
  background: #fafcfe;
}

.pe-compact-item strong {
  display: block;
  font-size: 0.82rem;
  color: var(--pbs-primary, #0d4d8c);
  margin-bottom: 0.2rem;
}

.pe-compact-item p {
  font-size: 0.78rem;
  line-height: 1.45;
  color: #3d4f5f;
  margin: 0;
}

.pe-mtls-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 992px) {
  .pe-mtls-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.pe-mtls-col {
  font-size: 0.86rem;
  line-height: 1.6;
  color: #3d4f5f;
}

.pe-mtls-col p {
  margin: 0 0 0.75rem;
}

.pe-mtls-col p:last-child {
  margin-bottom: 0;
}

.pe-mtls-col--practice {
  border-left: 3px solid var(--pbs-accent, #1a8fd4);
  padding-left: 1rem;
  background: rgba(244, 248, 252, 0.6);
  border-radius: 0 8px 8px 0;
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
}

.pe-scaling-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 768px) {
  .pe-scaling-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pe-scaling-card {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: var(--pbs-radius, 10px);
  padding: 1rem 1.1rem;
  background: #fff;
}

.pe-scaling-card h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--pbs-primary, #0d4d8c);
  margin: 0 0 0.45rem;
}

.pe-scaling-card p {
  font-size: 0.85rem;
  line-height: 1.55;
  color: #3d4f5f;
  margin: 0;
}

.pe-obs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 576px) {
  .pe-obs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .pe-obs-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pe-obs-card {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: var(--pbs-radius, 10px);
  padding: 1rem;
  background: #fff;
}

.pe-obs-card strong {
  display: block;
  font-size: 0.88rem;
  color: var(--pbs-primary, #0d4d8c);
  margin-bottom: 0.4rem;
}

.pe-obs-card p {
  font-size: 0.82rem;
  line-height: 1.5;
  color: #3d4f5f;
  margin: 0;
}

.pe-cta-section {
  padding: 2rem 0 2.5rem;
  background: linear-gradient(180deg, var(--pbs-bg, #f4f8fc) 0%, #fff 100%);
}

.pe-cta-box {
  border: 1px solid var(--pbs-border, #e2e8f0);
  border-radius: var(--pbs-radius, 10px);
  background: #fff;
  padding: 1.5rem 1.35rem;
  max-width: 52rem;
}

.pe-cta-box p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #3d4f5f;
  margin: 0 0 1.15rem;
}

.pe-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pe-cta-actions .btn-invest-primary,
.pe-cta-actions .btn-invest-secondary {
  display: inline-block;
}