:root {
  --primary: #5d56c8;
  --primary-strong: #4f46c6;
  --primary-glow: rgba(93, 86, 200, 0.22);
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #f8f7ff;
  --border: #dbe4f0;
  --text-dark: #0f172a;
  --text-muted: #64748b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 88rem;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.site-header .btn-nav {
  background-color: var(--primary);
  color: #fff !important;
  border: 1px solid transparent;
}

.site-header .btn-nav:hover {
  background-color: var(--primary-strong) !important;
  color: #fff !important;
  border-color: var(--primary-strong);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

h1,
h2,
h3,
h4,
.company-name {
  font-family: Inter, "IBM Plex Sans", sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

main {
  padding: 2.5rem 0 0;
}

.tech-hero {
  background: linear-gradient(140deg, rgba(93, 86, 200, 0.1), rgba(255, 255, 255, 0));
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.kicker::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: var(--primary);
}

h1 {
  margin: 0.7rem 0 0.75rem;
  font-size: clamp(1.85rem, 3.2vw, 2.8rem);
}

.subhead {
  margin: 0;
  color: var(--text-muted);
  max-width: 72ch;
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 1rem;
}

.framework-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
}

.framework-meta {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--primary);
  font-size: 0.8rem;
}

.framework-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.framework-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.card-link {
  width: fit-content;
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
}

.card-link::after { content: " →"; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.1rem;
  margin-top: 1rem;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.04);
}

.sequence-diagram {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: #fff;
  padding: 0.8rem;
}

.sequence-diagram svg {
  width: 100%;
  height: auto;
}

.sequence-flow {
  margin-top: 0.65rem;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text-muted);
  font-size: 0.77rem;
}

.api-link {
  fill: var(--primary);
  text-decoration: underline;
}



.docs-row {
  margin-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.doc-chip {
  text-decoration: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  font-size: 0.73rem;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

.doc-chip:hover {
  color: var(--primary-strong);
  border-color: #c7c3f4;
  background: var(--surface-soft);
}

.gov-note {
  margin: 0.65rem 0 0;
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: #ffffff;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  color: #34415f;
}

.why-note {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.spec-intro {
  margin: 0 0 0.6rem;
  color: var(--text-muted);
}
.api-hint {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tech-callout {
  margin: 1rem 0;
  padding: 0.8rem 0.95rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--surface-soft);
}

.api-details {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.7rem 0.85rem;
  background: #fff;
  margin-bottom: 1rem;
}

.api-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary-strong);
}

.api-details ul {
  margin: 0.7rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.block + .block {
  margin-top: 1rem;
}

.block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.block-title {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text-dark);
  font-size: 0.8rem;
}

.copy-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-dark);
  border-radius: 0.5rem;
  padding: 0.38rem 0.62rem;
  font-size: 0.76rem;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

pre {
  margin: 0;
  padding: 0.85rem;
  overflow-x: auto;
  border-radius: 0.7rem;
  border: 1px solid var(--border);
  background: #f7f9ff;
  color: #2a3550;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.5;
}

.pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 0.85rem;
}

.pattern-card {
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  padding: 0.9rem;
  background: #fff;
}

.pattern-card h4 {
  margin: 0 0 0.3rem;
}

.pattern-card p {
  margin: 0;
  color: var(--text-muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.1rem;
}

.btn-primary,
.btn-secondary {
  display: inline-block;
  text-decoration: none;
  border-radius: 0.7rem;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text-dark);
  background: #fff;
}

.docs-note {
  margin-top: 0.7rem;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.docs-note a {
  color: var(--primary-strong);
  font-weight: 600;
}

.tech-footer {
  margin-top: 3.5rem;
  border-top: 1px solid var(--border);
  background: #fff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.footer-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

@media (max-width: 900px) {
}



.diagram-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.6rem;
  align-items: stretch;
}

.diagram-step {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  padding: 0.75rem;
  background: #fff;
}

.diagram-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -0.58rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-weight: 700;
  background: var(--bg);
  width: 1.1rem;
  text-align: center;
}

.step-num {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--primary);
  font-size: 0.72rem;
  margin-bottom: 0.35rem;
}

.diagram-step h3 {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.24;
}

.diagram-step p {
  margin: 0.35rem 0 0;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text-muted);
  font-size: 0.77rem;
}

.api-hint a {
  color: var(--primary-strong);
}

.endpoint-flow {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface-soft);
  padding: 0.65rem 0.75rem;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  color: #3e4b6a;
  margin-bottom: 0.8rem;
}

.endpoint-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 0.75rem;
}

.endpoint-card {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.75rem;
  background: #fff;
}

.endpoint-card h4 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
}

.endpoint-card p {
  margin: 0.26rem 0;
  color: var(--text-muted);
  font-size: 0.83rem;
}

@media (max-width: 1120px) {
  .diagram-flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .diagram-step:nth-child(3n)::after { display: none; }
}

@media (max-width: 760px) {
  .diagram-flow { grid-template-columns: 1fr; }
  .diagram-step::after { display: none !important; }
}