:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #eff1f5;
  --text: #17191f;
  --text-secondary: #474f5e;
  --accent: #3d45a1;
  --accent-bg: #ecefff;
  --on-accent: #ffffff;
  --border: #cdd2dc;
  --control-border: #80899d;
  --focus: #3d45a1;
  --band: #101420;
  --band-text: #f7f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101217;
    --surface: #1b1e25;
    --surface-2: #252933;
    --text: #f7f8fa;
    --text-secondary: #b6becc;
    --accent: #b1b9ff;
    --accent-bg: #292e47;
    --on-accent: #101217;
    --border: #454b59;
    --control-border: #6f778a;
    --focus: #b1b9ff;
  }
}
@media (prefers-contrast: more) {
  :root { --text-secondary: var(--text); --border: var(--text); --control-border: var(--text); --surface: var(--bg); --surface-2: var(--bg); }
}
* { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 44rem; margin: 0 auto; padding: 1rem; }
header.site { background: var(--band); }
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .25rem 1.5rem; padding-top: .5rem; padding-bottom: .5rem; }
.brand { display: inline-flex; align-items: center; min-height: 3rem; }
.brand img { height: 2.25rem; width: auto; display: block; }
nav ul { list-style: none; display: flex; gap: .25rem 1rem; margin: 0; padding: 0; flex-wrap: wrap; }
nav a { display: inline-flex; align-items: center; min-height: 3rem; color: var(--band-text); text-underline-offset: .25em; font-weight: 600; }
a { color: var(--accent); text-underline-offset: .2em; }
a:focus-visible, .btn:focus-visible, summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
header.site a:focus-visible { outline-color: #b1b9ff; }
h1 { font-size: clamp(1.9rem, 5.5vw, 2.75rem); line-height: 1.15; margin: 2rem 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.375rem; line-height: 1.3; margin: 2.25rem 0 .5rem; }
p, li { max-width: 65ch; }
.lede { font-size: 1.1875rem; color: var(--text-secondary); }
.hero { display: block; width: 100%; height: auto; border-radius: 20px; margin: 1.5rem 0 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 3rem; padding: .5rem 1.5rem; border-radius: 16px; font-weight: 600; text-decoration: none;
  background: var(--accent); color: var(--on-accent); border: 2px solid var(--accent);
}
.btn:hover { filter: brightness(1.06); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 1.25rem 1.5rem; margin: 1rem 0; }
.card h3 { margin: 0 0 .25rem; font-size: 1.1875rem; }
.card p { margin: 0; color: var(--text-secondary); }
ul.plain { padding-left: 1.25rem; }
footer { border-top: 1px solid var(--border); margin-top: 3rem; color: var(--text-secondary); font-size: .9375rem; }
footer ul { list-style: none; display: flex; flex-wrap: wrap; gap: .25rem 1rem; padding: 0; margin: 0 0 .5rem; }
footer a { color: var(--text-secondary); display: inline-flex; align-items: center; min-height: 2.75rem; }
details { background: var(--surface); border: 1px solid var(--control-border); border-radius: 16px; padding: 0 1.25rem; margin: .75rem 0; }
summary { cursor: pointer; font-weight: 600; padding: .75rem 0; min-height: 3rem; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--on-accent); padding: .75rem 1rem; z-index: 10; }
.skip:focus { left: 0; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }