body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}

h1 {
  margin-top: 0;
}

#userBar {
  margin-bottom: 10px;
  font-size: 0.9em;
}

#userBar button {
  margin-left: 10px;
}

#topbar {
  margin-bottom: 20px;
}

#topbar button {
  margin-right: 10px;
  padding: 10px 20px;
  cursor: pointer;
}

#content {
  background: white;
  padding: 15px;
  border-radius: 8px;
  min-height: 60vh;
  white-space: pre-wrap;
}

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

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

.subject {
  font-weight: bold;
}

.meta {
  color: #666;
  font-size: 0.9em;
  margin-bottom: 5px;
}

button.primary {
  padding: 8px 16px;
  cursor: pointer;
}