body {
  font-family: sans-serif;
  background: #f2f2f2;
}

.container {
  width: 600px;
  margin: 30px auto;
  background: white;
  padding: 20px;
}

input, textarea {
  width: 100%;
  margin: 5px 0;
  padding: 8px;
}

.post {
  border-bottom: 1px solid #ddd;
  padding: 10px 0;
}