:root {
  --bg: #0e1116;
  --panel: #151a22;
  --text: #e7ecf4;
  --muted: #aeb9cc;
  --line: rgba(231,236,244,0.12);

  --accent: #7fb2ff;

  --radius: 10px;
  --max: 900px;
  --pad: 20px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.container.narrow {
  max-width: 720px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

.section {
  padding: 64px 0;
}

.section.alt {
  background: var(--panel);
}

h1 {
  font-size: 34px;
  margin: 0 0 18px;
}

h2 {
  font-size: 22px;
  margin: 0 0 14px;
}

h3 {
  font-size: 18px;
  margin: 0 0 6px;
}

.lede {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 18px;
}

.practice {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
}

.button {
  display: inline-block;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--accent);
  color: #06101f;
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  font-size: 13px;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
}

.footer-note {
  max-width: 360px;
}