:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
  color: #24332e;
  background: #f7f9f8;
  line-height: 1.8;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; }
main {
  max-width: 800px;
  margin: 48px auto;
  padding: 40px 48px;
  background: #fff;
  border: 1px solid #e3eae6;
  border-radius: 16px;
}
header { padding-bottom: 24px; border-bottom: 1px solid #e3eae6; }
.brand { color: #16835b; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: 30px; line-height: 1.4; letter-spacing: -.04em; margin: 8px 0 12px; }
.date { color: #66766e; font-size: 13px; }
h2 { font-size: 18px; line-height: 1.6; margin: 0 0 12px; letter-spacing: -.02em; }
p { font-size: 15px; margin: 12px 0 0; overflow-wrap: anywhere; word-break: keep-all; }
section { padding-top: 30px; }
a { color: #12734e; text-underline-offset: 3px; }
a:hover { color: #0b5237; }
a:focus-visible { outline: 2px solid #16835b; outline-offset: 4px; }
code { font-size: .9em; overflow-wrap: anywhere; }
footer { color: #66766e; font-size: 12px; border-top: 1px solid #e3eae6; margin-top: 36px; padding-top: 20px; }
@media (max-width: 600px) {
  main { margin: 0; padding: 28px 20px 36px; border: 0; border-radius: 0; }
  h1 { font-size: 26px; }
  h2 { font-size: 17px; }
}