:root {
  --bg: #0a0f14;
  --panel: #111a22;
  --border: #2a3b48;
  --text: #f1f5f8;
  --muted: #aab8c4;
  --accent: #44c8ff;
  --good: #38d39f;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

a { color: var(--accent); }

a:focus-visible {
  outline: 3px solid rgba(68, 200, 255, 0.82);
  outline-offset: 3px;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 15, 20, 0.96);
}

.topbar-inner {
  width: min(900px, calc(100% - 32px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 17px;
  font-weight: 800;
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid #2ba4da;
  border-radius: 8px;
  background: #1687bd;
  color: #fff;
  font-size: 13px;
}

.topbar-nav { display: flex; gap: 16px; font-size: 14px; }

.topbar-nav a {
  color: var(--muted);
  text-decoration: none;
}

.topbar-nav a:hover,
.topbar-nav a[aria-current="page"] { color: var(--text); }

main {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
  padding: 52px 0 68px;
}

h1 {
  margin: 0 0 10px;
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: 0;
}

.lede {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

.updated {
  margin: 16px 0 36px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumbs a { color: var(--muted); }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 16px 0 34px;
  color: var(--muted);
  font-size: 13px;
}

.article-meta span + span::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 3px;
  margin: 0 9px 3px 0;
  border-radius: 50%;
  background: var(--muted);
}

.toc {
  margin: 30px 0 36px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

.toc strong { display: block; margin-bottom: 8px; }
.toc ul { columns: 2; margin: 0; }
.toc li { break-inside: avoid; margin: 5px 0; }

.fact-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px 28px;
}

.fact {
  padding: 18px 0;
  border-top: 1px solid var(--border);
}

.fact strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}

.fact p { margin: 0; }

.resource-link {
  display: block;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
}

.resource-link:hover h2,
.resource-link:hover h3 { color: var(--accent); }
.resource-link h2,
.resource-link h3 { margin: 0 0 6px; font-size: 18px; }
.resource-link p { margin: 0; }
.resource-link .link-label { display: inline-block; margin-top: 8px; color: var(--accent); font-size: 13px; font-weight: 700; }

.steps { counter-reset: content-step; list-style: none; padding: 0; }
.steps li { position: relative; min-height: 44px; padding: 0 0 22px 54px; }
.steps li::before {
  counter-increment: content-step;
  content: counter(content-step);
  position: absolute;
  top: 1px;
  left: 0;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid #2ba4da;
  border-radius: 50%;
  background: #1687bd;
  color: #fff;
  font-weight: 800;
}

.inline-cta {
  margin: 34px 0 8px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.inline-cta p { max-width: 650px; }
.inline-cta a {
  display: inline-block;
  margin-top: 4px;
  padding: 10px 14px;
  border: 1px solid #2ba4da;
  border-radius: 7px;
  background: #1687bd;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.source-list { font-size: 14px; }
.source-list a { overflow-wrap: anywhere; }

.content-note {
  padding-left: 16px;
  border-left: 3px solid var(--accent);
}

.callout {
  margin: 0 0 34px;
  padding: 16px 18px;
  border-left: 3px solid var(--good);
  background: var(--panel);
  color: var(--text);
  line-height: 1.6;
}

section {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}

h2 { margin: 0 0 12px; font-size: 21px; letter-spacing: 0; }
h3 { margin: 20px 0 8px; font-size: 16px; letter-spacing: 0; }
p, li { color: var(--muted); line-height: 1.68; }
p { margin: 0 0 12px; }
ul { margin: 8px 0 0; padding-left: 22px; }
li { margin: 7px 0; }
strong { color: var(--text); }

footer {
  padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

footer nav { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 10px; }

@media (max-width: 600px) {
  .topbar-inner {
    width: 100%;
    min-height: 0;
    padding: calc(10px + env(safe-area-inset-top)) 12px 10px;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .topbar-nav { width: 100%; justify-content: flex-start; flex-wrap: wrap; gap: 8px 16px; }
  main { width: 100%; padding: 34px 16px 46px; }
  h1 { font-size: 30px; }
  .lede { font-size: 15px; }
  .toc ul { columns: 1; }
  .fact-grid,
  .resource-grid { grid-template-columns: 1fr; }
  .article-meta { display: block; }
  .article-meta span { display: block; margin-top: 5px; }
  .article-meta span + span::before { display: none; }
}