body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #4CAF50;
  color: white;
  text-align: center;
  padding: 1rem;
}

form {
  max-width: 600px;
  margin: 2rem auto;
  display: flex;
  flex-direction: column;
}

textarea {
  resize: vertical;
  min-height: 100px;
  padding: 10px;
  margin-bottom: 10px;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

#posts {
  max-width: 600px;
  margin: 2rem auto;
  background: white;
  padding: 1rem;
  border-radius: 5px;
}

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

.post:last-child {
  border-bottom: none;
}