/* ============================================================
   Azure Governance Platform — Design System v2
   "Obsidian + Gold" — Premium enterprise documentation
   ============================================================ */

/* 1. Reset --------------------------------------------------- */
@viewport { width: device-width; }
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; overflow-x: hidden; scroll-behavior: smooth; }
body { overflow-x: hidden; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img { max-width: 100%; height: auto; display: block; }

/* 2. Design Tokens ------------------------------------------- */
:root {
  /* Brand core */
  --burgundy:       #500711;
  --burgundy-deep:  #2d040a;
  --burgundy-dark:  #3a0510;
  --burgundy-light: #7a1d2e;
  --gold:           #ffc957;
  --gold-muted:     #f5dfa0;
  --gold-dim:       rgba(255,201,87,.12);
  --cream:          #fdfaf3;

  /* Surfaces — warm-tinted, not sterile */
  --surface-0:  #ffffff;
  --surface-1:  #fafaf8;
  --surface-2:  #f5f4f1;
  --surface-3:  #eeedea;

  /* Text */
  --text-primary:   #1a1a1a;
  --text-secondary: #555550;
  --text-tertiary:  #8a8a82;
  --text-inverse:   #ffffff;

  /* Semantic */
  --green:      #059669;
  --green-glow: rgba(5,150,105,.25);

  /* Typography */
  --font-heading: 'Montserrat', system-ui, -apple-system, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'SF Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;

  /* Spacing scale (4px base) */
  --sp-1: .25rem; --sp-2: .5rem; --sp-3: .75rem; --sp-4: 1rem;
  --sp-5: 1.25rem; --sp-6: 1.5rem; --sp-8: 2rem; --sp-10: 2.5rem;
  --sp-12: 3rem; --sp-16: 4rem; --sp-20: 5rem; --sp-24: 6rem;

  /* Shadows — warm tint, layered */
  --shadow-sm:  0 1px 2px rgba(80,7,17,.04);
  --shadow-md:  0 4px 12px rgba(80,7,17,.06), 0 1px 3px rgba(0,0,0,.04);
  --shadow-lg:  0 12px 40px rgba(80,7,17,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-glow: 0 0 0 1px rgba(255,201,87,.15), 0 8px 32px rgba(80,7,17,.10);

  /* Radii */
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 20px;

  /* Transitions */
  --ease-out: cubic-bezier(.16,1,.3,1);
  --ease-spring: cubic-bezier(.34,1.56,.64,1);
  --dur-fast: .15s; --dur-normal: .25s; --dur-slow: .4s;
}

/* 3. Typography ---------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--surface-0);
}

a {
  color: var(--burgundy);
  text-decoration: none;
  transition: color var(--dur-fast);
}
a:hover { color: var(--burgundy-light); }

/* 4. Accessibility ------------------------------------------- */
.skip-link {
  position: absolute; top: -100%; left: var(--sp-4);
  padding: var(--sp-2) var(--sp-4);
  background: var(--burgundy); color: var(--text-inverse);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 1000; font-weight: 600;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* 5. Navigation ---------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(0,0,0,.06);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  background: var(--burgundy); color: var(--gold);
  font-family: var(--font-heading); font-weight: 800; font-size: .9rem;
  border-radius: var(--radius-sm); letter-spacing: .5px;
  transition: transform var(--dur-fast) var(--ease-spring), background var(--dur-fast);
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--gold); background: var(--burgundy-dark); transform: scale(1.05); }
.nav-links { display: flex; gap: var(--sp-1); align-items: center; }
.nav-links a {
  padding: .4rem .8rem; font-size: .875rem; font-weight: 500;
  color: var(--text-secondary); border-radius: var(--radius-sm);
  transition: background var(--dur-fast), color var(--dur-fast);
  position: relative;
}
.nav-links a:hover { background: var(--surface-2); color: var(--text-primary); }
.nav-links a[aria-current="page"],
.nav-links a.active {
  background: var(--surface-2); color: var(--text-primary);
}
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--text-secondary); border-radius: 2px;
  transition: transform var(--dur-normal) var(--ease-out), opacity var(--dur-fast);
}

/* 6. Hero ---------------------------------------------------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--burgundy-deep);
  color: var(--text-inverse);
  text-align: center;
  padding: var(--sp-20) var(--sp-6) var(--sp-16);
}
/* Gradient mesh layers */
.hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(122,29,46,.7) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 75% 60%, rgba(58,5,16,.8) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 50% 0%, rgba(255,201,87,.06) 0%, transparent 60%);
  animation: heroShift 20s ease-in-out infinite alternate;
}
@keyframes heroShift {
  0%   { opacity: 1; transform: scale(1); }
  100% { opacity: .85; transform: scale(1.05); }
}
/* Subtle noise texture */
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.03'/%3E%3C/svg%3E");
  opacity: .4; pointer-events: none;
}
.hero-inner { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  background: var(--gold-dim); color: var(--gold);
  font-size: .8rem; font-weight: 600;
  padding: .35rem 1.1rem; border-radius: 50px;
  border: 1px solid rgba(255,201,87,.2);
  margin-bottom: var(--sp-6); letter-spacing: .3px;
  backdrop-filter: blur(8px);
}
.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 800; line-height: 1.08;
  margin-bottom: var(--sp-4);
  letter-spacing: -.03em;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,.7);
  max-width: 620px; margin: 0 auto var(--sp-10);
  line-height: 1.65;
}

/* Metrics */
.hero-metrics {
  display: flex; justify-content: center;
  gap: var(--sp-8); margin-bottom: var(--sp-10);
  flex-wrap: wrap;
}
.metric {
  text-align: center; padding: var(--sp-3) var(--sp-4);
  background: rgba(255,255,255,.04); border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,.06);
  min-width: 100px;
}
.metric-value {
  display: block; font-family: var(--font-heading);
  font-size: 1.7rem; font-weight: 700; color: var(--gold);
  line-height: 1.2;
}
.metric-label {
  display: block; font-size: .72rem; color: rgba(255,255,255,.5);
  text-transform: uppercase; letter-spacing: .1em; margin-top: var(--sp-1);
}

/* Hero actions */
.hero-actions { display: flex; gap: var(--sp-4); justify-content: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center;
  padding: .8rem 1.8rem;
  background: var(--gold); color: var(--burgundy-deep);
  font-weight: 700; font-size: .95rem;
  border-radius: var(--radius-sm);
  transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-normal);
  box-shadow: 0 0 0 0 rgba(255,201,87,0);
}
.btn-primary:hover {
  color: var(--burgundy-deep);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255,201,87,.3);
}
.btn-outline {
  display: inline-flex; align-items: center;
  padding: .8rem 1.8rem;
  border: 1.5px solid rgba(255,255,255,.25); color: var(--text-inverse);
  font-weight: 600; font-size: .95rem; border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.btn-outline:hover {
  border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.06);
  color: var(--text-inverse);
}

/* 7. Sections ------------------------------------------------ */
.section { padding: var(--sp-16) var(--sp-6); }
.section > *:not(.section-header) { max-width: 1200px; margin-left: auto; margin-right: auto; }
.section-header { max-width: 1200px; margin: 0 auto var(--sp-10); text-align: center; }
.section--alt { background: var(--surface-1); }
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700; color: var(--text-primary);
  margin-bottom: var(--sp-2); letter-spacing: -.02em;
}
.section-subtitle { font-size: 1.05rem; color: var(--text-tertiary); }

/* 8. Cards --------------------------------------------------- */
.grid { display: grid; gap: var(--sp-6); max-width: 1200px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  position: relative;
  background: var(--surface-0);
  border: 1px solid var(--surface-3);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  transition: transform var(--dur-normal) var(--ease-out), box-shadow var(--dur-normal);
}
.card::before {
  content: ''; position: absolute; inset: -1px;
  border-radius: inherit; padding: 1px;
  background: linear-gradient(135deg, var(--burgundy-light), var(--gold), var(--burgundy));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity var(--dur-normal);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card:hover::before { opacity: 1; }

.card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: var(--sp-2);
}
.card-description {
  font-size: .9rem; color: var(--text-secondary);
  line-height: 1.65;
}

/* Doc cards */
.doc-card {
  display: block; position: relative;
  background: var(--surface-0);
  border: 1px solid var(--surface-3);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  transition: transform var(--dur-normal) var(--ease-out), box-shadow var(--dur-normal);
}
.doc-card::before {
  content: ''; position: absolute; inset: -1px;
  border-radius: inherit; padding: 1px;
  background: linear-gradient(135deg, var(--burgundy), var(--gold));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity var(--dur-normal); pointer-events: none;
}
.doc-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.doc-card:hover::before { opacity: 1; }

.doc-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: var(--sp-1);
}
.doc-card-description { font-size: .9rem; color: var(--text-secondary); margin-bottom: var(--sp-3); }
.doc-card-link {
  font-size: .85rem; font-weight: 600; color: var(--burgundy);
  transition: color var(--dur-fast), gap var(--dur-fast);
  display: inline-flex; align-items: center; gap: var(--sp-1);
}
.doc-card:hover .doc-card-link { color: var(--burgundy-light); gap: var(--sp-2); }

/* 9. Tech Grid ----------------------------------------------- */
.tech-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--sp-4); max-width: 1200px; }
.tech-item {
  background: var(--surface-0);
  border: 1px solid var(--surface-3);
  border-radius: var(--radius-md); padding: var(--sp-5);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.tech-item:hover { border-color: rgba(80,7,17,.15); box-shadow: var(--shadow-sm); }
.tech-layer {
  display: block; font-size: .68rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-tertiary); margin-bottom: var(--sp-1);
}
.tech-name {
  font-family: var(--font-heading); font-weight: 700;
  font-size: .9rem; color: var(--text-primary);
}

/* 10. Architecture Diagram ----------------------------------- */
.architecture-block {
  max-width: 100%; margin: 0 auto;
  background: var(--text-primary);
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
}
@media (min-width: 768px) { .architecture-block { max-width: 1200px; } }
.architecture-pre {
  padding: var(--sp-4); color: #e2e8f0;
  font-family: var(--font-mono); font-size: .5rem;
  line-height: 1.3; overflow-x: auto;
  margin: 0; white-space: pre;
  max-width: 100%; -webkit-overflow-scrolling: touch;
}
@media (min-width: 480px) { .architecture-pre { padding: var(--sp-5); font-size: .55rem; } }
@media (min-width: 768px) { .architecture-pre { padding: var(--sp-6); font-size: .7rem; line-height: 1.4; } }
@media (min-width: 1024px) { .architecture-pre { padding: var(--sp-8); font-size: .8rem; } }

/* 11. Code --------------------------------------------------- */
pre {
  background: #0f0f0f; border-radius: var(--radius-md);
  padding: var(--sp-6); overflow-x: auto; margin: var(--sp-4) 0;
  border: 1px solid rgba(255,255,255,.06);
}
pre code {
  font-family: var(--font-mono); font-size: .85rem;
  color: #e2e8f0; line-height: 1.7;
}
code {
  font-family: var(--font-mono); font-size: .84em;
  background: var(--surface-2); padding: .15em .4em;
  border-radius: 5px; color: var(--burgundy);
}
pre code { background: none; padding: 0; color: #e2e8f0; border-radius: 0; }

/* 12. Links & Quick Start ------------------------------------ */
.link-list {
  display: flex; flex-wrap: wrap; gap: var(--sp-3);
  margin-top: var(--sp-6); max-width: 1200px;
}
.link-item {
  display: inline-flex; align-items: center;
  padding: var(--sp-2) var(--sp-4);
  background: var(--surface-1); border: 1px solid var(--surface-3);
  border-radius: var(--radius-sm); font-size: .88rem; font-weight: 500;
  color: var(--text-secondary);
  transition: border-color var(--dur-fast), color var(--dur-fast), box-shadow var(--dur-fast);
}
.link-item:hover { border-color: var(--burgundy); color: var(--burgundy); box-shadow: var(--shadow-sm); }
.quick-start { max-width: 1200px; margin: 0 auto; }

/* 13. Status Grid -------------------------------------------- */
.status-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--sp-4); max-width: 1200px; }
.status-item {
  display: flex; align-items: center; gap: var(--sp-3);
  background: var(--surface-0); border: 1px solid var(--surface-3);
  border-radius: var(--radius-md); padding: var(--sp-4) var(--sp-5);
  transition: box-shadow var(--dur-fast);
}
.status-item:hover { box-shadow: var(--shadow-sm); }
.status-dot {
  width: 10px; height: 10px;
  background: var(--green); border-radius: 50%;
  flex-shrink: 0; position: relative;
}
.status-dot::after {
  content: ''; position: absolute; inset: -4px;
  border: 2px solid var(--green); border-radius: 50%;
  opacity: 0; animation: statusPulse 2.5s ease-out infinite;
}
@keyframes statusPulse {
  0%   { transform: scale(.8); opacity: .6; }
  100% { transform: scale(1.6); opacity: 0; }
}
.status-label { font-size: .85rem; color: var(--text-tertiary); }
.status-value {
  margin-left: auto; font-family: var(--font-heading);
  font-weight: 700; font-size: .95rem; color: var(--text-primary);
}

/* 14. Footer ------------------------------------------------- */
.footer {
  background: var(--burgundy-deep); color: rgba(255,255,255,.5);
  padding: var(--sp-12) var(--sp-6) var(--sp-8);
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--sp-6);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-logo {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: var(--burgundy); color: var(--gold);
  font-family: var(--font-heading); font-weight: 800; font-size: .85rem;
  border-radius: var(--radius-sm);
}
.footer-links { display: flex; gap: var(--sp-6); flex-wrap: wrap; }
.footer-links a { font-size: .88rem; color: rgba(255,255,255,.45); transition: color var(--dur-fast); }
.footer-links a:hover { color: var(--gold); }
.footer-bottom {
  max-width: 1200px; margin: var(--sp-6) auto 0;
  text-align: center; font-size: .78rem; color: rgba(255,255,255,.25);
}

/* 15. Page Header (sub-pages) -------------------------------- */
.page-header {
  background: var(--burgundy-deep); color: var(--text-inverse);
  padding: var(--sp-12) var(--sp-6) var(--sp-10);
  position: relative; overflow: hidden;
}
.page-header::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(122,29,46,.5), transparent 65%),
    radial-gradient(ellipse at 80% 30%, rgba(255,201,87,.04), transparent 50%);
  pointer-events: none;
}
.page-header-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.breadcrumb { font-size: .85rem; margin-bottom: var(--sp-3); color: rgba(255,255,255,.45); }
.breadcrumb a { color: rgba(255,255,255,.55); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { margin: 0 var(--sp-2); }
.page-title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800; letter-spacing: -.02em;
}
.page-subtitle { font-size: 1.05rem; color: rgba(255,255,255,.6); margin-top: var(--sp-2); }

/* 16. Doc List (sub-pages) ----------------------------------- */
.doc-list {
  max-width: 800px; margin: 0 auto;
  display: flex; flex-direction: column; gap: var(--sp-4);
}
.doc-list-item {
  position: relative;
  background: var(--surface-0); border: 1px solid var(--surface-3);
  border-radius: var(--radius-lg); padding: var(--sp-6) var(--sp-8);
  transition: transform var(--dur-normal) var(--ease-out), box-shadow var(--dur-normal);
}
.doc-list-item::before {
  content: ''; position: absolute; left: 0; top: 50%;
  transform: translateY(-50%); width: 3px; height: 0;
  background: linear-gradient(to bottom, var(--burgundy), var(--gold));
  border-radius: 0 2px 2px 0;
  transition: height var(--dur-normal) var(--ease-out);
}
.doc-list-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}
.doc-list-item:hover::before { height: 60%; }
.doc-list-item h3 { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700; margin-bottom: var(--sp-1); }
.doc-list-item h3 a { color: var(--text-primary); }
.doc-list-item h3 a:hover { color: var(--burgundy); }
.doc-list-item p { font-size: .9rem; color: var(--text-secondary); line-height: 1.55; }

/* 17. Prose (markdown content) ------------------------------- */
.prose h1 { font-family: var(--font-heading); font-size: 2rem; font-weight: 800; color: var(--text-primary); margin: var(--sp-8) 0 var(--sp-4); letter-spacing: -.01em; }
.prose h2 { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin: var(--sp-8) 0 var(--sp-3); padding-bottom: var(--sp-2); border-bottom: 1px solid var(--surface-3); }
.prose h3 { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; color: var(--text-primary); margin: var(--sp-6) 0 var(--sp-2); }
.prose p { margin: var(--sp-3) 0; color: var(--text-secondary); }
.prose a { color: var(--burgundy); font-weight: 500; text-decoration: underline; text-decoration-color: rgba(80,7,17,.2); text-underline-offset: 2px; transition: text-decoration-color var(--dur-fast); }
.prose a:hover { text-decoration-color: var(--burgundy); }
.prose code { font-size: .84em; background: var(--surface-2); padding: .15em .4em; border-radius: 5px; color: var(--burgundy); }
.prose pre code { background: none; color: #e2e8f0; padding: 0; }
.prose table { width: 100%; border-collapse: collapse; margin: var(--sp-6) 0; font-size: .9rem; display: block; overflow-x: auto; max-width: 100%; }
.prose th { background: var(--burgundy-deep); color: var(--text-inverse); padding: .65rem 1rem; text-align: left; font-weight: 600; font-size: .85rem; letter-spacing: .02em; }
.prose td { padding: .6rem 1rem; border-bottom: 1px solid var(--surface-3); }
.prose tr:nth-child(even) td { background: var(--surface-1); }
.prose ul, .prose ol { margin: var(--sp-3) 0; padding-left: 1.75rem; }
.prose li { margin: var(--sp-1) 0; color: var(--text-secondary); }
.prose blockquote { border-left: 3px solid var(--gold); background: var(--cream); padding: var(--sp-4) var(--sp-6); margin: var(--sp-6) 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.prose blockquote p { margin: var(--sp-1) 0; color: var(--text-secondary); }

/* 18. Callout Banner ----------------------------------------- */
.callout {
  background: linear-gradient(135deg, var(--burgundy), var(--burgundy-light));
  color: var(--text-inverse);
  padding: var(--sp-5) var(--sp-6); border-radius: var(--radius-md);
  margin-bottom: var(--sp-8); font-size: .95rem;
}
.callout a { color: var(--gold); font-weight: 600; text-decoration: underline; }
.callout a:hover { color: var(--gold-muted); }
.callout strong { color: var(--text-inverse); }

/* 19. Entrance Animations ------------------------------------ */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0; transform: translateY(20px);
    transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
  }
  .fade-up.visible { opacity: 1; transform: translateY(0); }
  /* Stagger children */
  .stagger > * { opacity: 0; transform: translateY(16px); transition: opacity .5s var(--ease-out), transform .5s var(--ease-out); }
  .stagger.visible > *:nth-child(1) { transition-delay: 0s; }
  .stagger.visible > *:nth-child(2) { transition-delay: .06s; }
  .stagger.visible > *:nth-child(3) { transition-delay: .12s; }
  .stagger.visible > *:nth-child(4) { transition-delay: .18s; }
  .stagger.visible > *:nth-child(5) { transition-delay: .24s; }
  .stagger.visible > *:nth-child(6) { transition-delay: .3s; }
  .stagger.visible > * { opacity: 0; transform: translateY(16px); }
  .stagger.visible > * { opacity: 1; transform: translateY(0); }
}

/* 20. Responsive --------------------------------------------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .status-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(255,255,255,.95); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--surface-3);
    flex-direction: column; padding: var(--sp-3);
    box-shadow: var(--shadow-lg); z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .7rem var(--sp-4); border-radius: var(--radius-sm); }

  .hero { padding: var(--sp-12) var(--sp-5) var(--sp-10); }
  .hero-metrics { gap: var(--sp-3); }
  .metric { min-width: 80px; }
  .metric-value { font-size: 1.35rem; }

  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .status-grid { grid-template-columns: 1fr; }

  .section { padding: var(--sp-12) var(--sp-5); }
  .section-title { font-size: 1.5rem; }
  .page-header { padding: var(--sp-10) var(--sp-5) var(--sp-8); }
  .page-title { font-size: 1.7rem; }
  .doc-list-item { padding: var(--sp-5) var(--sp-6); }
}
@media (max-width: 480px) {
  .hero-metrics { flex-direction: column; gap: var(--sp-3); }
  .hero-actions { flex-direction: column; align-items: center; }
  .tech-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .nav-inner { padding: 0 var(--sp-4); }
}

/* 21. Print -------------------------------------------------- */
@media print {
  .nav, .footer, .skip-link, .hero-actions { display: none; }
  body { color: #000; background: #fff; }
  .hero { background: #fff; color: #000; padding: var(--sp-4) 0; }
  .hero::before, .hero::after { display: none; }
  .hero-title { color: #000; }
  .hero-badge, .hero-metrics { display: none; }
  a { color: #000; }
  .section--alt { background: #fff; }
  .card::before, .doc-card::before { display: none; }
}