body {
  font-family: 'IBM Plex Serif', serif;
  background-color: #fafcf9;
  color: #1a1a1a;
  margin: 0;
  padding: 0;
  line-height: 1.7;
}
header {
  text-align: center;
  background: #ecf5ec;
  padding: 3rem 1rem;
}
h1 {
  font-size: 2.2rem;
  color: #224d2b;
}
.tagline {
  font-size: 1rem;
  color: #486a4d;
}
main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}
article {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  padding: 1.5rem;
  margin-bottom: 2rem;
}
a {
  color: #2f6f3f;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
footer {
  text-align: center;
  font-size: 0.9rem;
  color: #3a523e;
  background: #ecf5ec;
  padding: 2rem 1rem;
}