body {
  font-family: sans-serif;
  padding: 1em;
}

table {
  border-collapse: collapse;
  width: 100%;
  max-width: 600px;
  margin-bottom: 1em;
}

td,
th {
  border: 1px solid #ccc;
  padding: 0.5em;
}

th {
  text-align: left;
  background-color: #f5f5f5;
}

button {
  padding: 0.5em 1em;
  font-size: 1em;
}

#messages {
  margin-top: 1em;
  border: 1px solid #ccc;
  padding: 1em;
  background: #fafafa;
  max-height: 300px;
  overflow-y: auto;
}

.message {
  margin-bottom: 0.5em;
  font-family: monospace;
}

.hidden {
  display: none;
}

button {
  padding: 1px 7px;
  border: none;
  outline: 1px solid gray;
  cursor: pointer;
}