body {
  font-family: Arial;
  background: #111;
  color: white;
  margin: 0;
}

.container {
  max-width: 600px;
  margin: auto;
  padding: 20px;
}

input, textarea {
  width: 100%;
  margin: 5px 0;
  padding: 10px;
}

button {
  padding: 10px;
  margin: 5px;
  cursor: pointer;
}

.post {
  background: #222;
  padding: 10px;
  margin: 10px 0;
  border-radius: 8px;
}