/* DigiTrust platform and reference-architecture extensions. */
.proof-heading {
  display: flex;
  align-items: center;
  gap: 13px;
}
.proof-logo {
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
  border: 1px solid #dbe7f2;
  border-radius: 15px;
  background: #fff;
}

.trust-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}
.flow-step {
  position: relative;
  min-height: 178px;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  border: 1px solid #c7dff1;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
}
.flow-step:not(:last-child)::after {
  content: "\2192";
  position: absolute;
  top: 50%;
  right: -17px;
  z-index: 2;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #1d4ed8;
  background: #fff;
  font-weight: 950;
  transform: translateY(-50%);
}
.flow-step > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: #1d4ed8;
  background: #dbeafe;
  font-size: 13px;
  font-weight: 950;
}
.flow-step strong { color: var(--ink); font-size: 18px; }
.flow-step small { color: #526375; font-size: 14px; line-height: 1.5; }

.architecture-split { align-items: stretch; }
.architecture-card { height: 100%; }
.ai-card { border-color: #9be7dc; background: linear-gradient(180deg, #fff, #effcf9); }
.section.dark .architecture-card p,
.section.dark .architecture-card li { color: #425466; }

.dimension-grid,
.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.dimension-card,
.principle-card {
  min-height: 155px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.dimension-card strong,
.principle-card strong { color: var(--ink-2); font-size: 19px; }
.dimension-card span,
.principle-card span { color: #526375; font-size: 15px; line-height: 1.55; }
.trust-notice { max-width: 960px; margin-left: auto; margin-right: auto; }

.aws-grid { align-items: center; }
.aws-boundary { color: #aabbd0 !important; }
.aws-pattern { display: grid; gap: 12px; }
.aws-pattern-row {
  padding: 18px 20px;
  display: grid;
  gap: 5px;
  border: 1px solid rgba(147, 197, 253, 0.26);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.07);
}
.aws-pattern-row span {
  color: #93c5fd;
  font-size: 12px;
  font-weight: 950;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.aws-pattern-row strong { color: #fff; font-size: 17px; }
.aws-pattern-row small { color: #b9c8d7; font-size: 14px; line-height: 1.45; }
.section.dark .btn.secondary { color: var(--ink); }

.architecture-hero .hero-wrap { padding-top: 94px; padding-bottom: 88px; }
.architecture-layers { display: grid; gap: 14px; }
.layer-card {
  padding: 24px;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 20px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.layer-number {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #fff;
  background: linear-gradient(135deg, #1d4ed8, #0f766e);
  font-weight: 950;
}
.layer-card h3 { margin-top: 1px; }
.layer-card p { margin-bottom: 0; }

.boundary-card {
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.07);
}
.boundary-card h3 { color: #fff; }
.boundary-card .list li { color: #d6e2ed; border-color: rgba(255,255,255,0.1); }
.deterministic-card { border-color: rgba(147, 197, 253, 0.4); }
.ai-boundary-card { border-color: rgba(134, 239, 172, 0.38); }

.numbered-list { margin: 0; padding: 0; display: grid; gap: 12px; list-style: none; }
.numbered-list li {
  padding: 14px;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 13px;
  align-items: start;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #f8fafc;
}
.numbered-list li > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: #1d4ed8;
  background: #dbeafe;
  font-weight: 950;
}
.numbered-list strong { display: block; color: var(--ink-2); }
.numbered-list small { display: block; margin-top: 3px; color: #526375; line-height: 1.45; }

@media (max-width: 1120px) {
  .navlinks { gap: 13px; }
  .navlinks a { font-size: 13px; }
}
@media (max-width: 980px) {
  .trust-flow { grid-template-columns: 1fr; }
  .flow-step { min-height: 0; }
  .flow-step:not(:last-child)::after { content: "\2193"; top: auto; right: 50%; bottom: -18px; transform: translateX(50%); }
  .dimension-grid, .principles-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .dimension-grid, .principles-grid { grid-template-columns: 1fr; }
  .layer-card { grid-template-columns: 1fr; }
  .proof-heading { align-items: flex-start; }
  .proof-logo { width: 48px; height: 48px; }
}