src/components/Header.css

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
  }
  .logo-and-name {
    display: flex;
    align-items: center;
  }
  .logo {
    height: 30px;
    margin-right: 10px;
  }
  .site-name {
    font-size: 24px;
  }
  .user-and-message {
    display: flex;
    align-items: center;
  }
  .user-avatar {
    height: 40px;
    margin-right: 10px;
  }
  .message-center {
    font-size: 16px;
  }
  .nav {
    background-color: #dab8c2;
    display: flex;
    justify-content: center;
  }
  .nav-item {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
  }
  .active {
    background-color: #996633;
  }