.container {
  display:flex;
  flex-direction: column;
  justify-content: space-between;
  height:100%;
}

.mat-sidenav-container,.mat-sidenav-content {
 height: 100%;
}

 .mat-sidenav{
    width:250px;
  }
  
.main-content {
    padding-left:25px; 
    padding-right:15px;
    justify-content:space-around;
  }
  
  .mat-toolbar {
    justify-content: start;
  }