body {
  font-family: system-ui, -apple-system, Roboto, sans-serif;
  background: #f9f9f9;
  color: #222;
  margin: 0;
  padding: 0;
}

header, footer {
  text-align: center;
  background: #fff;
  padding: 1em;
  box-shadow: 0 1px 5px rgba(0,0,0,0.1);
}

main {
  max-width: 900px;
  margin: 2em auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5em;
  padding: 0 1em;
}

.post {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  transition: transform 0.2s ease;
}

.post:hover {
  transform: translateY(-5px);
}

.post img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.post h2 {
  font-size: 1.1rem;
  margin: 0.8em;
  color: #0073e6;
}

.post p {
  padding: 0 1em 1em;
  color: #555;
}