:root { color-scheme: light; }
body {
  margin: 0;
  padding: 40px 20px 64px;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  background: #f5f7fb;
  color: #14181f;
  line-height: 1.55;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #e4e9f2;
  border-radius: 16px;
  padding: 32px 36px;
}
h1 {
  font-size: 26px;
  letter-spacing: -.02em;
  margin: 0 0 8px;
}
.meta {
  color: #5a667c;
  font-size: 13px;
  margin-bottom: 24px;
}
h2 {
  font-size: 15px;
  margin: 26px 0 8px;
  letter-spacing: -.01em;
}
p, li {
  font-size: 14.5px;
  color: #2a3344;
}
ul { padding-left: 1.2em; }
code {
  font-size: 13px;
  background: #eef2f8;
  padding: 1px 6px;
  border-radius: 4px;
}
.note {
  background: #eef6ff;
  border: 1px solid #c9e0ff;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 13.5px;
  color: #1a3a66;
}
footer {
  margin-top: 28px;
  font-size: 12px;
  color: #8893a6;
}
.back {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 13px;
  color: #3b6ef5;
  text-decoration: none;
}
.back:hover { text-decoration: underline; }
a { color: #0b5bd3; }
h3 { font-size: 14px; margin: 16px 0 6px; }
.wrap p + p { margin-top: 10px; }
.wrap a:hover { text-decoration: underline; }