body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #e6dede;
}

header {
  background: #333;
  color: rgb(255, 255, 255);
  padding: 1em;
  text-align: center;
}

.tab-container {
  display: flex;
  justify-content: center;
  background-color: #eee;
  padding: 0.5em;
}

.tab-button {
  background-color: #ddd;
  border: none;
  padding: 10px 20px;
  margin: 0 5px;
  cursor: pointer;
  font-size: 16px;
}

.tab-button:hover {
  background-color: #ccc;
}

#content-area {
  padding: 20px;
}