header {
    background-color: #2c3e50;
    color: white;
    padding: 10px 20px;
    display: flex;
    align-items: center;
  }
  
  header img {
    height: 50px;
  }

#pageContent {
    margin: 70px 0px;
    z-index: 998;
    height: calc(100vh - 140px);
    overflow-y: auto;
}