body { margin:0px; }
a{text-decoration: none; color:black;}
#container {  
    height: 100vh;
    display: flex; flex-flow: column nowrap;
    gap: 5px;
    background-color:azure;}
#title { font-size: 50px; text-align: center; 
    background-color:cornflowerblue;}
#menu {
    flex: 0 0 30px;
    background-color: lightblue;
    display: flex; flex-flow: row nowrap;
    justify-content: space-evenly;
    align-items: center;}
#container2 {
    flex: 1 1 auto;
    display: flex; flex-flow: row nowrap;}

#main{
    flex: 1 1 auto; background-color: white;}

#sidebar{
    flex: 0 0 200px;
    background-color: lightblue;}