:root{
  /* ─── Google Material Design 3 Dark Theme Tokens ─── */
  /* All WCAG AA compliant: text tokens achieve ≥4.5:1 on paired surfaces */
  color-scheme:dark;

  /* – primary · blue-indigo · brand action color – */
  --fo-primary:#90A4FF;
  --fo-on-primary:#001B5E;
  --fo-primary-container:#25378E;
  --fo-on-primary-container:#DBE1FF;

  /* – secondary · cool blue-grey · supporting UI – */
  --fo-secondary:#8C9AB5;
  --fo-on-secondary:#1C2A41;
  --fo-secondary-container:#334058;
  --fo-on-secondary-container:#D2E0FF;

  /* – tertiary · amber-gold · "flash" accent, CTA highlight – */
  --fo-tertiary:#FFD06B;
  --fo-on-tertiary:#3D2800;
  --fo-tertiary-container:#583D00;
  --fo-on-tertiary-container:#FFDF9A;

  /* – error – */
  --fo-error:#FFB4A0;
  --fo-on-error:#561E00;
  --fo-error-container:#733216;
  --fo-on-error-container:#FFDBCF;

  /* – surface · dark canvas hierarchy – */
  --fo-surface-dim:#111318;
  --fo-surface:#15171C;
  --fo-surface-bright:#1C1F26;
  --fo-surface-container:#1A1C22;
  --fo-surface-container-high:#21232A;
  --fo-surface-container-highest:#282A32;

  /* – on-surface · readable text on all surface levels – */
  --fo-on-surface:#E0E2EC;
  --fo-on-surface-variant:#C4C6D0;
  --fo-on-surface-dim:#A0A3B0;

  /* – inverse surface – */
  --fo-inverse-surface:#E0E2EC;
  --fo-inverse-on-surface:#2C2E38;
  --fo-inverse-primary:#90A4FF;

  /* – outline – */
  --fo-outline:#8C8F99;
  --fo-outline-variant:#44474F;
  --fo-outline-strong:#BFC2CC;

  /* – shape tokens – */
  --fo-radius-xs:10px;
  --fo-radius-sm:16px;
  --fo-radius-md:24px;
  --fo-radius-lg:34px;
  --fo-radius-full:999px;

  /* – elevation · shadows – */
  --fo-elevation-1:0 1px 3px rgba(0,0,0,.15),0 1px 2px rgba(0,0,0,.30);
  --fo-elevation-2:0 4px 12px rgba(0,0,0,.18),0 2px 6px rgba(0,0,0,.22);
  --fo-elevation-3:0 8px 28px rgba(0,0,0,.22),0 4px 16px rgba(0,0,0,.18);
  --fo-elevation-4:0 18px 52px rgba(0,0,0,.30),0 8px 24px rgba(0,0,0,.22);
  --fo-elevation-5:0 28px 80px rgba(0,0,0,.42);

  /* – typography – */
  --fo-font:"Inter",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --fo-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  /* – layout – */
  --fo-max:960px;

  /* – state layer opacities (M3 standard) – */
  --fo-state-hover:0.08;
  --fo-state-focus:0.12;
  --fo-state-pressed:0.12;
  --fo-state-drag:0.16;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--fo-surface-dim)}
body{
  margin:0;
  font-family:var(--fo-font);
  background:var(--fo-surface-dim);
  color:var(--fo-on-surface);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body:before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(circle at 78% 5%,color-mix(in srgb,var(--fo-primary) 54%,transparent),transparent 28%),
    radial-gradient(circle at 10% 16%,color-mix(in srgb,var(--fo-tertiary) 42%,transparent),transparent 26%),
    linear-gradient(135deg,var(--fo-surface-dim) 0%,var(--fo-surface-container) 46%,var(--fo-surface-container-high) 100%);
}
a{color:inherit;text-underline-offset:4px}
main{padding:48px 20px 64px}
.shell{
  max-width:var(--fo-max);
  margin:0 auto;
}
.topbar{
  position:sticky;
  top:0;
  z-index:20;
  backdrop-filter:blur(18px) saturate(135%);
  background:color-mix(in srgb,var(--fo-surface-dim) 78%,transparent);
  border-bottom:1px solid var(--fo-outline-variant);
}
.topbar-inner{
  max-width:var(--fo-max);
  margin:0 auto;
  padding:14px 20px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
}
.topbar-meta{
  display:flex;
  align-items:center;
  gap:10px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
}
.brand-mark{
  width:42px;
  height:42px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg,var(--fo-primary),var(--fo-tertiary));
  color:var(--fo-on-primary);
  font-weight:900;
  box-shadow:0 14px 34px color-mix(in srgb,var(--fo-tertiary) 18%,transparent);
}
.brand-copy{
  display:flex;
  flex-direction:column;
  line-height:1.05;
}
.brand-copy strong{letter-spacing:-.03em}
.brand-copy span{
  font-size:.76rem;
  color:var(--fo-on-surface-dim);
  font-family:var(--fo-mono);
}
.topnav{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  font-size:.92rem;
}
.topnav a{
  color:var(--fo-on-surface-dim);
  text-decoration:none;
}
.topnav a:hover{color:var(--fo-on-surface)}
.utility-badge{
  display:inline-flex;
  align-items:center;
  padding:7px 12px;
  border-radius:var(--fo-radius-full);
  border:1px solid var(--fo-outline-variant);
  background:color-mix(in srgb,var(--fo-on-surface) 6%,transparent);
  color:var(--fo-on-surface);
  font-size:.74rem;
  font-weight:800;
  letter-spacing:.04em;
  text-transform:uppercase;
  white-space:nowrap;
}
.hero,
.panel{
  background:linear-gradient(180deg,color-mix(in srgb,var(--fo-on-surface) 9%,transparent),color-mix(in srgb,var(--fo-on-surface) 4.5%,transparent));
  border:1px solid var(--fo-outline-variant);
  border-radius:var(--fo-radius-md);
  box-shadow:var(--fo-elevation-5);
}
.hero{
  padding:30px;
  margin-bottom:22px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:var(--fo-radius-full);
  background:color-mix(in srgb,var(--fo-tertiary) 10%,transparent);
  border:1px solid color-mix(in srgb,var(--fo-tertiary) 28%,transparent);
  color:var(--fo-on-tertiary-container);
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-family:var(--fo-mono);
}
h1,h2,h3{
  margin:0 0 16px;
  line-height:1.06;
  letter-spacing:-.05em;
  color:var(--fo-on-surface);
}
h1{font-size:clamp(2.4rem,6vw,4.6rem)}
h2{font-size:clamp(1.65rem,3vw,2.5rem)}
h3{font-size:1.15rem}
p,li{font-size:1rem;color:var(--fo-on-surface-variant)}
.lede{
  max-width:720px;
  font-size:1.12rem;
  color:var(--fo-on-surface);
}
.grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.panel{
  padding:24px;
}
.panel ul{
  margin:0;
  padding-left:18px;
}
.card-list{
  display:grid;
  gap:14px;
}
.card{
  padding:16px 18px;
  border:1px solid var(--fo-outline-variant);
  border-radius:18px;
  background:color-mix(in srgb,var(--fo-on-surface) 3.5%,transparent);
}
.meta-list{
  display:grid;
  gap:12px;
  margin-top:14px;
}
.meta-list div{
  padding:14px 16px;
  border-radius:16px;
  border:1px solid var(--fo-outline-variant);
  background:color-mix(in srgb,var(--fo-on-surface) 3%,transparent);
}
.meta-list strong{
  display:block;
  margin-bottom:4px;
  color:var(--fo-on-surface);
}
.site-footer{
  padding:28px 20px 40px;
  border-top:1px solid var(--fo-outline-variant);
  color:var(--fo-on-surface-dim);
}
.site-footer-inner{
  max-width:var(--fo-max);
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
}
.footer-links{
  list-style:none;
  padding:0;
  margin:0;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.footer-links li{display:inline}
.site-footer a,.footer-links a{
  color:var(--fo-tertiary);
  text-decoration:none;
}
.pill-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.pill{
  border:1px solid var(--fo-outline-variant);
  background:color-mix(in srgb,var(--fo-on-surface) 5%,transparent);
  padding:8px 12px;
  border-radius:var(--fo-radius-full);
  font-size:.9rem;
  color:var(--fo-on-surface);
}
.note{
  border-left:3px solid var(--fo-tertiary);
  padding:12px 16px;
  border-radius:0 14px 14px 0;
  background:color-mix(in srgb,var(--fo-tertiary) 8%,transparent);
  color:var(--fo-on-surface-variant);
}
.good{
  color:color-mix(in srgb,var(--fo-primary) 90%,var(--fo-tertiary));
  font-weight:700;
}
@media (max-width:760px){
  .topbar-inner,.site-footer-inner{align-items:flex-start}
  .grid{grid-template-columns:1fr}
  .hero,.panel{padding:22px}
  main{padding-left:16px;padding-right:16px}
  .topnav{gap:10px;font-size:.88rem}
  .topbar-meta{width:100%;justify-content:flex-start}
  .utility-badge{font-size:.68rem}
  .footer-links{gap:8px;font-size:.92rem}
}