/* ============================================================
   OpesCare Developer Docs — shell, brand and diagrams (v2)
   Loaded after docs.css; content styles (tables, callouts, code
   tabs) stay there. Brand blue #0F4C81, self-hosted Inter.
   ============================================================ */

:root {
  --dx-blue: #0F4C81;
  --dx-blue-600: #0B3D69;
  --dx-blue-50: #EEF4FA;
  --dx-blue-100: #D6E4F2;
  --dx-sky: #5EA3DC;
  --dx-ink: #0F172A;
  --dx-text: #1E293B;
  --dx-muted: #64748B;
  --dx-line: #E2E8F0;
  --dx-bg: #FFFFFF;
  --dx-soft: #F8FAFC;
  --dx-green: #0E7A4F;
  --dx-green-50: #E8F5EE;
  --dx-red: #B42318;
  --dx-red-50: #FDECEA;
  --dx-amber: #A15C07;
  --dx-header-h: 64px;
  --dx-nav-w: 264px;
  --dx-toc-w: 232px;
}

body.dx {
  background: var(--dx-bg);
  color: var(--dx-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
}

.dx-skip {
  position: absolute; left: -9999px; top: 8px; z-index: 300;
  background: var(--dx-blue); color: #fff; padding: .5rem .875rem; border-radius: 8px;
}
.dx-skip:focus { left: 12px; }
.dx-offscreen { position: absolute; left: -9999px; }
.dx-ico { width: 20px; height: 20px; }
.dx-ico-sm { width: 16px; height: 16px; flex-shrink: 0; opacity: .8; }

/* ---------- Header ---------- */
.dx-header {
  position: sticky; top: 0; z-index: 200;
  height: var(--dx-header-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--dx-line);
}
.dx-header-inner {
  height: 100%; max-width: 1440px; margin: 0 auto;
  display: flex; align-items: center; gap: .75rem;
  padding: 0 1.25rem;
}
.dx-brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--dx-ink); }
.dx-brand-word { font-weight: 800; font-size: 1.125rem; letter-spacing: -.01em; color: var(--dx-blue); }
.dx-brand-tag {
  font-size: .75rem; font-weight: 700; color: var(--dx-blue); text-decoration: none;
  background: var(--dx-blue-50); border: 1px solid var(--dx-blue-100);
  padding: .2rem .55rem; border-radius: 999px;
}
.dx-top-links { display: flex; gap: .25rem; margin-left: 1.25rem; flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.dx-top-links::-webkit-scrollbar { display: none; }
.dx-top-links a {
  color: var(--dx-muted); text-decoration: none; font-size: .875rem; font-weight: 600;
  padding: .45rem .7rem; border-radius: 8px; white-space: nowrap;
}
.dx-top-links a:hover { color: var(--dx-ink); background: var(--dx-soft); }
.dx-top-links a.is-active { color: var(--dx-blue); background: var(--dx-blue-50); }
.dx-header-actions { display: flex; align-items: center; gap: .75rem; margin-left: auto; }
.dx-lang { display: inline-flex; border: 1px solid var(--dx-line); border-radius: 8px; overflow: hidden; }
.dx-lang a { font-size: .75rem; font-weight: 700; padding: .3rem .55rem; color: var(--dx-muted); text-decoration: none; }
.dx-lang a.is-active { background: var(--dx-blue); color: #fff; }
.dx-cta {
  background: var(--dx-blue); color: #fff; text-decoration: none; font-weight: 700; font-size: .8125rem;
  padding: .55rem .9rem; border-radius: 10px; white-space: nowrap;
  box-shadow: 0 1px 2px rgba(15, 76, 129, .25);
}
.dx-cta:hover { background: var(--dx-blue-600); }
.dx-menu-toggle {
  display: none; background: none; border: 1px solid var(--dx-line); border-radius: 8px;
  color: var(--dx-ink); padding: .35rem; cursor: pointer;
}

/* ---------- Shell ---------- */
.dx-shell {
  display: grid;
  grid-template-columns: var(--dx-nav-w) minmax(0, 1fr) var(--dx-toc-w);
  max-width: 1440px; margin: 0 auto; min-height: calc(100vh - var(--dx-header-h));
}
.dx-nav {
  position: sticky; top: var(--dx-header-h); align-self: start;
  height: calc(100vh - var(--dx-header-h)); overflow-y: auto;
  padding: 1.5rem 1rem 2rem; border-right: 1px solid var(--dx-line);
  background: var(--dx-soft);
}
.dx-nav-section { margin-bottom: 1.5rem; }
.dx-nav-heading {
  font-size: .6875rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  color: var(--dx-muted); padding: 0 .6rem; margin-bottom: .4rem;
}
.dx-nav-link {
  display: flex; align-items: center; gap: .55rem;
  padding: .42rem .6rem; border-radius: 8px; font-size: .875rem; font-weight: 500;
  color: var(--dx-text); text-decoration: none;
}
.dx-nav-link:hover { background: #fff; color: var(--dx-blue); }
.dx-nav-link.is-active { background: #fff; color: var(--dx-blue); font-weight: 700; box-shadow: inset 3px 0 0 var(--dx-blue), 0 1px 2px rgba(15, 23, 42, .06); }

.dx-main { min-width: 0; }
.docs-content.dx-content {
  margin: 0; max-width: 880px; padding: 2.5rem 3rem 4rem;
}
.dx-content h1 { color: var(--dx-ink); letter-spacing: -.02em; }
.dx-content h2 { scroll-margin-top: calc(var(--dx-header-h) + 16px); }
.dx-content h3 { scroll-margin-top: calc(var(--dx-header-h) + 16px); }
.dx-content a { color: var(--dx-blue); }

.dx-toc {
  position: sticky; top: var(--dx-header-h); align-self: start;
  height: calc(100vh - var(--dx-header-h)); overflow-y: auto;
  padding: 2.5rem 1.25rem 2rem 0;
}
.dx-toc-title { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--dx-muted); margin-bottom: .6rem; }
.dx-toc-list { display: flex; flex-direction: column; border-left: 1px solid var(--dx-line); }
.dx-toc-link {
  font-size: .8125rem; color: var(--dx-muted); text-decoration: none;
  padding: .28rem 0 .28rem .8rem; margin-left: -1px; border-left: 2px solid transparent; line-height: 1.35;
}
.dx-toc-link.is-sub { padding-left: 1.5rem; font-size: .78rem; }
.dx-toc-link:hover { color: var(--dx-ink); }
.dx-toc-link.is-active { color: var(--dx-blue); border-left-color: var(--dx-blue); font-weight: 600; }
.dx-toc.is-empty .dx-toc-title, .dx-toc.is-empty .dx-toc-list { display: none; }
.dx-seal-card {
  display: flex; gap: .7rem; align-items: center; margin-top: 1.75rem;
  padding: .85rem; border: 1px solid var(--dx-blue-100); border-radius: 14px;
  background: linear-gradient(160deg, var(--dx-blue-50), #fff);
}
.dx-seal { width: 48px; height: 48px; object-fit: contain; flex-shrink: 0; }
.dx-seal-card strong { display: block; font-size: .8125rem; color: var(--dx-blue); }
.dx-seal-card span { display: block; font-size: .75rem; color: var(--dx-muted); line-height: 1.4; }

/* ---------- Code blocks: copy button ---------- */
.dx-pre-wrap { position: relative; }
.dx-copy {
  position: absolute; top: .5rem; right: .5rem;
  font: 600 .72rem/1 'Inter', sans-serif; color: #CBD5E1;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 6px; padding: .35rem .55rem; cursor: pointer; opacity: .85;
}
.dx-copy:hover, .dx-copy:focus-visible { opacity: 1; color: #fff; background: rgba(255, 255, 255, .16); }
.dx-copy.is-done { color: #86EFAC; border-color: rgba(134, 239, 172, .5); }

/* ---------- Hero, cards ---------- */
.dx-hero { display: flex; gap: 1.25rem; align-items: flex-start; margin-bottom: 1.5rem; }
.dx-hero-seal { width: 72px; height: 72px; object-fit: contain; flex-shrink: 0; filter: drop-shadow(0 6px 14px rgba(15, 76, 129, .18)); }
.dx-hero-icon {
  width: 56px; height: 56px; border-radius: 16px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--dx-blue); color: #fff; box-shadow: 0 8px 20px rgba(15, 76, 129, .25);
}
.dx-hero-icon .dx-ico { width: 26px; height: 26px; }
.dx-hero h1 { margin-top: 0; }
.dx-eyebrow { font-size: .75rem !important; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--dx-blue) !important; margin: 0 0 .35rem !important; }
.dx-eyebrow a { text-decoration: none; }
.dx-hint { color: var(--dx-muted); font-size: .875rem; }

.dx-layers { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .75rem; margin: 1rem 0 1.5rem; }
.dx-layer { border: 1px solid var(--dx-line); border-radius: 12px; padding: .9rem 1rem; background: #fff; border-top: 3px solid var(--dx-blue); }
.dx-layer h3 { margin: 0 0 .3rem !important; font-size: .95rem !important; }
.dx-layer p { margin: 0 !important; font-size: .85rem !important; color: var(--dx-muted); }
.dx-layer-clients { border-top-color: #64748B; }
.dx-layer-gates { border-top-color: var(--dx-green); }
.dx-layer-services { border-top-color: var(--dx-sky); }
.dx-layer-data { border-top-color: var(--dx-ink); }

.dx-flow-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: .85rem; margin: 1rem 0 2rem; }
.dx-flow-card {
  display: flex; flex-direction: column; gap: .35rem; padding: 1rem 1.1rem;
  border: 1px solid var(--dx-line); border-radius: 14px; text-decoration: none !important;
  color: var(--dx-text) !important; background: #fff;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.dx-flow-card:hover { border-color: var(--dx-blue); box-shadow: 0 8px 24px rgba(15, 76, 129, .12); transform: translateY(-2px); }
.dx-flow-card .dx-ico { color: var(--dx-blue); }
.dx-flow-card strong { color: var(--dx-ink); }
.dx-flow-card span { font-size: .85rem; color: var(--dx-muted); line-height: 1.45; }

.dx-code-refs { list-style: none; padding: 0 !important; }
.dx-code-refs li { margin: .3rem 0; }

.dx-pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--dx-line); }
.dx-pager a {
  display: flex; flex-direction: column; gap: .15rem; text-decoration: none;
  border: 1px solid var(--dx-line); border-radius: 12px; padding: .75rem 1rem; font-weight: 700; min-width: 0;
}
.dx-pager a span { font-size: .72rem; font-weight: 600; color: var(--dx-muted); text-transform: uppercase; letter-spacing: .06em; }
.dx-pager-next { margin-left: auto; text-align: right; }
.dx-pager a:hover { border-color: var(--dx-blue); }

/* ---------- Footer ---------- */
.dx-footer { border-top: 1px solid var(--dx-line); background: var(--dx-soft); }
.dx-footer-inner {
  max-width: 1440px; margin: 0 auto; padding: 1.75rem 1.25rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem;
}
.dx-footer-brand { display: flex; align-items: center; gap: .75rem; }
.dx-footer-brand img { width: 44px; height: 44px; object-fit: contain; }
.dx-footer-brand strong { display: block; color: var(--dx-blue); font-size: .9rem; }
.dx-footer-brand span { display: block; color: var(--dx-muted); font-size: .8rem; }
.dx-footer-links { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; }
.dx-footer-links a { color: var(--dx-text); text-decoration: none; font-size: .85rem; font-weight: 500; }
.dx-footer-links a:hover { color: var(--dx-blue); }
.dx-copyright { margin-left: auto; color: var(--dx-muted); font-size: .8rem; }

/* Diagrams: public/css/blog-diagrams.css (shared with the blog). */

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .dx-shell { grid-template-columns: var(--dx-nav-w) minmax(0, 1fr); }
  .dx-toc { display: none; }
}
@media (max-width: 900px) {
  .dx-shell { grid-template-columns: minmax(0, 1fr); }
  .dx-menu-toggle { display: inline-flex; }
  .dx-top-links { display: none; }
  .dx-nav {
    position: fixed; top: var(--dx-header-h); left: 0; bottom: 0; width: 86vw; max-width: 300px; height: auto;
    z-index: 150; transform: translateX(-102%); transition: transform .25s ease; box-shadow: 8px 0 24px rgba(15, 23, 42, .12);
  }
  .dx-nav.open { transform: translateX(0); }
  .docs-content.dx-content { padding: 1.5rem 16px 3rem; }
}
@media (max-width: 560px) {
  .dx-brand-tag { display: none; }
  .dx-cta { padding: .5rem .7rem; font-size: .75rem; }
  .dx-header-inner { padding: 0 12px; gap: .5rem; }
  .dx-hero { flex-direction: column; gap: .75rem; }
  .dx-hero-seal { width: 56px; height: 56px; }
  .dx-copyright { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .dx-nav, .dx-flow-card { transition: none; }
}
@media print {
  .dx-header, .dx-nav, .dx-toc, .dx-copy { display: none !important; }
  .dx-shell { display: block; }
}