:root {
  --c-bg: #ffffff;
  --c-fg: #0b0f14;
  --c-fg-muted: #4a5568;
  --c-accent: #0d2b4b;
  --c-accent-2: #1e88e5;
  --c-accent-3: #00b894;
  --c-warn-bg: #fff7ed;
  --c-warn-fg: #9a3412;
  --c-warn-border: #fb923c;
  --c-muted: #edf2f7;
  --c-border: #e5e7eb;
  --c-code-bg: #f1f5f9;
  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 14px;
  --fs-base: 16px;
  --lh-base: 1.65;
  --maxw-text: 820px;
  --maxw-wide: 1100px;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, 'Liberation Mono', monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--c-bg); color: var(--c-fg); font-family: var(--font-sans); font-size: var(--fs-base); line-height: var(--lh-base); -webkit-font-smoothing: antialiased; }
main.page { max-width: var(--maxw-text); margin: 0 auto; padding: 2rem 1.25rem 4rem; }
main.page.wide { max-width: var(--maxw-wide); }
h1, h2, h3, h4 { color: var(--c-accent); line-height: 1.25; }
h1 { font-size: 2rem; margin: 0 0 1rem; }
h2 { font-size: 1.4rem; margin: 2.2rem 0 .6rem; border-bottom: 1px solid var(--c-border); padding-bottom: .25rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 .4rem; }
p.lead { font-size: 1.12rem; color: #1e2a38; }
p, ul, ol { margin: .6rem 0 1rem; }
ul, ol { padding-left: 1.4rem; }
a { color: var(--c-accent-2); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--c-accent); }
a:focus-visible { outline: 2px solid var(--c-accent-2); outline-offset: 2px; border-radius: var(--radius-s); }
small, .meta { color: var(--c-fg-muted); font-size: .9rem; }
code, pre { font-family: var(--font-mono); font-size: .95em; }
code { background: var(--c-code-bg); padding: .1rem .35rem; border-radius: var(--radius-s); }
pre { background: #0b0f14; color: var(--c-muted); padding: 1rem 1.25rem; border-radius: var(--radius-m); overflow-x: auto; line-height: 1.5; }
pre code { background: transparent; padding: 0; color: inherit; }
.warn { background: var(--c-warn-bg); border: 1px solid var(--c-warn-border); color: var(--c-warn-fg); padding: 1rem 1.25rem; border-radius: var(--radius-m); margin: 1rem 0 2rem; font-weight: 500; }
.callout { background: var(--c-muted); border-left: 4px solid var(--c-accent-2); padding: .9rem 1rem; border-radius: 0 var(--radius-m) var(--radius-m) 0; margin: 1rem 0; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; }
th, td { border: 1px solid var(--c-border); padding: .55rem .75rem; text-align: left; vertical-align: top; }
th { background: #f8fafc; font-weight: 600; }
.nav { display: flex; gap: .6rem; flex-wrap: wrap; font-size: .95rem; margin-bottom: 1.5rem; }
.nav a { color: var(--c-accent-2); text-decoration: none; padding: .35rem .8rem; border: 1px solid var(--c-border); border-radius: 999px; }
.nav a:hover { border-color: var(--c-accent); }
.nav a.current { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.btn { display: inline-block; padding: .7rem 1.1rem; border-radius: var(--radius-m); border: 1px solid transparent; font-weight: 600; cursor: pointer; text-decoration: none; font-size: 1rem; line-height: 1.2; }
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: #0a2240; }
.btn-secondary { background: transparent; color: var(--c-accent); border-color: var(--c-accent); }
.btn-secondary:hover { background: var(--c-muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card { border: 1px solid var(--c-border); border-radius: var(--radius-l); padding: 1.2rem; background: #fff; transition: border-color .15s ease; }
.card:hover { border-color: var(--c-accent); }
.card h3 { margin-top: 0; color: var(--c-accent); }
figure { margin: 1.5rem 0; padding: 1rem; background: var(--c-muted); border-radius: var(--radius-m); }
figcaption { font-size: .88rem; color: var(--c-fg-muted); margin-top: .75rem; }
@media (max-width: 640px) {
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.2rem; }
  main.page { padding: 1.25rem 1rem 3rem; }
  .nav { font-size: .9rem; }
}