:root {
  --navy-950: #010b24;
  --navy-900: #011134;
  --navy-800: #0a1f4d;
  --blue: #2f7bff;
  --blue-soft: #8fb6ff;
  --green: #22c55e;
  --text: #eef3ff;
  --muted: #9fb0d3;
  --line: rgba(143, 182, 255, 0.16);
  --card: rgba(10, 31, 77, 0.55);
  --radius: 18px;
  --max: 1080px;
  --prose: 44rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(900px 600px at 70% -10%, rgba(47, 123, 255, 0.28), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(47, 123, 255, 0.12), transparent 60%),
    var(--navy-950);
  background-attachment: fixed;
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--blue-soft); text-underline-offset: 3px; }
a:hover { color: #fff; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header ---------------------------------------------------------------- */

.site-header { padding: 22px 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }

.nav { display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

main { flex: 1; }

/* Hero ------------------------------------------------------------------ */

.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: 48px; padding: 56px 0 72px; }

.eyebrow { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--blue-soft); margin-bottom: 14px; }

h1 { font-size: clamp(38px, 6vw, 62px); line-height: 1.04; letter-spacing: -0.03em; margin: 0 0 20px; font-weight: 800; }
h1 .accent { background: linear-gradient(90deg, #fff, var(--blue-soft)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.lede { font-size: 19px; color: var(--muted); max-width: 32rem; margin: 0 0 30px; }

.badges { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--text); font-size: 15px; font-weight: 600; }
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }

.hero-art { position: relative; justify-self: center; }
.hero-art img { width: min(340px, 70vw); height: auto; border-radius: 64px; box-shadow: 0 30px 80px rgba(47, 123, 255, 0.35), 0 0 0 1px var(--line); }

/* Steps ----------------------------------------------------------------- */

.section { padding: 24px 0 72px; }
.section h2 { font-size: 30px; letter-spacing: -0.02em; margin: 0 0 28px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; list-style: none; padding: 0; margin: 0; counter-reset: step; }
.steps li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; counter-increment: step; }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: rgba(47, 123, 255, 0.18); color: var(--blue-soft); font-weight: 700; margin-bottom: 14px; }
.steps h3 { margin: 0 0 6px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); font-size: 15.5px; }

.note { color: var(--muted); font-size: 15px; max-width: var(--prose); }

/* Prose pages ----------------------------------------------------------- */

.prose { max-width: var(--prose); padding: 40px 0 72px; }
.prose h1 { font-size: clamp(32px, 5vw, 44px); margin-bottom: 8px; }
.prose .updated { color: var(--muted); font-size: 15px; margin: 0 0 32px; }
.prose h2 { font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 10px; }
.prose p, .prose li { color: #d6e0f5; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 6px 0; }
.prose strong { color: var(--text); }

.callout { background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 12px; padding: 18px 20px; margin: 24px 0; }
.callout p { margin: 0; }
.callout p + p { margin-top: 8px; }

details { border-bottom: 1px solid var(--line); padding: 16px 0; }
details summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; float: right; color: var(--blue-soft); font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { margin: 10px 0 0; }

/* Footer ---------------------------------------------------------------- */

.site-footer { border-top: 1px solid var(--line); padding: 28px 0 36px; font-size: 14px; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 28px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 0; }

/* Small screens --------------------------------------------------------- */

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 28px 0 56px; text-align: left; }
  .hero-art { justify-self: start; order: -1; }
  .hero-art img { width: 120px; border-radius: 28px; }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .nav { gap: 14px; font-size: 14px; }
  .nav .hide-sm { display: none; }
  .lede { font-size: 17px; }
}