:root {
  --bg: #ffffff;
  --fg: #1c2733;
  --muted: #5b6776;
  --rule: #dde3ea;
  --accent: #1f5fbf;
  --accent-fg: #ffffff;
  --navy: #0b2545;
  --navy-2: #13315c;
  --surface: #f6f8fb;
  --code-bg: #eef2f7;
  --pre-bg: #0f1b2d;
  --pre-fg: #dbe7f5;
  --gutter: max(16px, calc((100% - 54rem) / 2));
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1420;
    --fg: #e4e9f0;
    --muted: #9aa7b6;
    --rule: #26364a;
    --accent: #6fb0ff;
    --accent-fg: #07121f;
    --navy: #08182c;
    --navy-2: #0f2a4d;
    --surface: #111d2d;
    --code-bg: #172435;
    --pre-bg: #09111d;
    --pre-fg: #dbe7f5;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 54rem; margin: 0 auto; padding: 0 16px 1rem; }
main > p, main > ul, main > ol { max-width: 46rem; }

/* header */
header {
  background: var(--navy);
  padding: .85rem var(--gutter);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .4rem 1.5rem;
}
header a.home { display: inline-flex; align-items: center; gap: .6rem; color: #fff; font-weight: 650; font-size: 1.05rem; letter-spacing: .01em; text-decoration: none; }
header a.home img { display: block; width: 30px; height: 30px; }
nav { display: flex; flex-wrap: wrap; gap: .15rem .95rem; font-size: .88rem; }
nav a { color: #c5d6ee; text-decoration: none; padding: .15rem 0; border-bottom: 2px solid transparent; }
nav a:hover, nav a:focus-visible { color: #fff; border-bottom-color: #6fb0ff; }
nav a[href="./"] { color: #fff; border-bottom-color: #6fb0ff; }

/* hero (home) */
.hero { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; padding: 3rem var(--gutter) 3.2rem; }
.hero h1 { color: #fff; font-size: clamp(1.8rem, 4.5vw, 2.6rem); line-height: 1.15; margin: 0 0 .9rem; max-width: 40rem; letter-spacing: -.01em; }
.hero p.lede { color: #c9d8ec; font-size: 1.12rem; max-width: 40rem; margin: 0 0 1.4rem; }
.hero a { color: #9cc7ff; }
.hero .badges { margin: 1.2rem 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.2rem 0 0; }
.btn { display: inline-block; padding: .65rem 1.25rem; font: inherit; font-weight: 600; text-decoration: none; border-radius: 6px; border: 1px solid transparent; background: var(--accent); color: var(--accent-fg); cursor: pointer; }
.btn:hover { filter: brightness(1.08); }
.hero .btn { background: #fff; color: var(--navy); }
.btn.secondary, .hero .btn.secondary { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn.secondary:hover { background: rgba(255,255,255,.1); filter: none; }

/* trust strip, cards, steps */
.trust { display: flex; flex-wrap: wrap; gap: .4rem 1.6rem; margin: 0 var(--gutter); padding: .9rem 0; border-bottom: 1px solid var(--rule); color: var(--muted); font-size: .88rem; }
.trust span::before { content: "\2713"; color: var(--accent); font-weight: 700; margin-right: .45rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 1rem 0 0; }
.card { border: 1px solid var(--rule); border-radius: 8px; padding: 1.1rem 1.2rem; background: var(--surface); }
.card h3 { margin: 0 0 .4rem; font-size: 1.05rem; color: var(--fg); }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem; margin: 1rem 0 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { position: relative; padding: .2rem 0 0 2.6rem; counter-increment: step; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 1.9rem; height: 1.9rem; border-radius: 50%; background: var(--navy); color: #fff; font-weight: 650; display: flex; align-items: center; justify-content: center; font-size: .95rem; }
.steps strong { display: block; }
.note { border-left: 3px solid var(--accent); background: var(--surface); padding: .7rem 1rem; border-radius: 0 6px 6px 0; max-width: 46rem; }

/* type */
h1 { font-size: 1.9rem; line-height: 1.2; margin: 1.8rem 0 .5rem; color: var(--navy); letter-spacing: -.01em; }
@media (prefers-color-scheme: dark) { h1 { color: #fff; } }
h2 { font-size: 1.3rem; margin: 2.4rem 0 .6rem; padding-top: .9rem; border-top: 1px solid var(--rule); line-height: 1.3; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .3rem; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
p.lede { font-size: 1.12rem; color: var(--muted); }
.meta { color: var(--muted); font-size: .88rem; margin: 0 0 .3rem; }

/* tables and code */
table { border-collapse: collapse; width: 100%; margin: .9rem 0; font-size: .94rem; display: block; overflow-x: auto; }
th, td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-weight: 650; background: var(--surface); border-bottom: 2px solid var(--rule); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .88em; }
code { background: var(--code-bg); padding: .12em .35em; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--pre-bg); color: var(--pre-fg); padding: .9rem 1.1rem; border-radius: 8px; overflow-x: auto; line-height: 1.5; }
pre code { background: none; padding: 0; color: inherit; }
blockquote { margin: .75rem 0; padding: .25rem 1rem; border-left: 3px solid var(--rule); color: var(--muted); }

/* footer */
footer { margin-top: 3rem; background: var(--surface); border-top: 1px solid var(--rule); padding: 1.4rem var(--gutter) 2rem; color: var(--muted); font-size: .85rem; }
footer p { margin: .5rem 0 0; max-width: 46rem; }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }

@media print {
  header, footer, .hero .actions { display: none; }
  .hero { background: none; color: #000; padding: 0; }
  .hero h1, .hero p.lede { color: #000; }
}