body {
  background: grey;
  color: white;
  font-family: "Courier New", monospace;
  padding:0;margin:0;
}
h1 {background: linear-gradient(#96aba6, #d1e3df, #666e6c, black); margin-top:0;}
input, button {
  background: linear-gradient(#96aba6, #d1e3df, #666e6c, black);
  color: black;
  padding: 5px;
  margin: 3px;
}

#messages {
  border: 1px solid #00ffcc;
  height: 200px;
  overflow-y: auto;
  padding: 5px;
}

.warning {
  background: red;
  padding: 10px;
  color: white;
}