:root {
  --ink: #1f2328;
  --muted: #6b7280;
  --paper: #ffffff;
  --panel: #f7f8fa;
  --rule: #dfe3e8;
  --accent: #2f5d8a;
  --accent-soft: #4a7cae;
  --code-bg: #f2f4f7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16.5px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

header {
  max-width: 700px;
  margin: 0 auto;
  padding: 26px 22px 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 8px;
  border-radius: 2px;
  background: var(--accent);
  vertical-align: 1px;
}

nav { font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; }
nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--rule);
  margin-left: 12px;
}
nav a:hover { color: var(--accent); border-bottom-color: var(--accent-soft); }

main {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 22px 48px;
}

article h1 {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: 31px;
  line-height: 1.2;
  font-weight: 400;
  margin: 30px 0 14px;
  letter-spacing: -0.01em;
}

article h2 {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: 21px;
  font-weight: 400;
  margin: 34px 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.lede {
  color: var(--muted);
  font-size: 17.5px;
  line-height: 1.6;
  margin-top: 0;
}

a { color: var(--accent); text-decoration-color: var(--rule); }
a:hover { text-decoration-color: var(--accent-soft); }

ul.notes { list-style: none; margin: 18px 0; padding: 0; }

ul.notes li {
  padding: 12px 0 11px;
  border-bottom: 1px solid var(--rule);
}

ul.notes a {
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

ul.notes .date {
  float: right;
  font: 13px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--muted);
}

ul.notes .note {
  display: block;
  color: var(--muted);
  font-size: 15px;
  margin-top: 3px;
}

.mono, code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 14px;
}

pre {
  background: var(--code-bg);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.5;
}

.card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 2px 18px;
  margin: 20px 0;
}

.aside {
  color: var(--muted);
  font-size: 15px;
  border-left: 3px solid var(--rule);
  padding-left: 14px;
  margin: 20px 0;
}

ol.steps, ul.plain { padding-left: 20px; }
ol.steps li, ul.plain li { margin: 8px 0; }

footer {
  max-width: 700px;
  margin: 0 auto;
  padding: 14px 22px 44px;
  color: var(--muted);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  border-top: 1px solid var(--rule);
}

footer a { color: var(--muted); }