style.css

html,body {
    margin: 0;
    height: 100%;
    width: 100%;
    display: flex;
}
.container-main {
    height:100%;
    width: 100%;
    background-color: bisque;
    display: flex;
}
.container-main .container-left {
    width: 200px;
    height: 100%;
    background-color: black;
}
.container-main .container-right {
    flex: 1;
}
.container-main .container-right .container-top {
    display: flex;
    border-radius: 10px;
    width: 100%;
    height: 50%;
    background-color: blueviolet;
}
.container-main .container-right .container-bot {
    height: 50%;
    border-radius: 10px;
    background-color: crimson;
} 
.container-main .container-right .container-top .container-menu {
    background-color:red;
    width:100%;
    height: 14%;
}
.container-main .container-right .container-top .container-menu .menu {
    margin: 0;
    width: 50%;
    height: 100%;
    background-color: azure;
}
ul {
    float: right;
    margin-right:20px ;
    list-style: none;
    text-decoration: none;
}
ul li {
    float:left;
}
ul li a {
    padding: 4px 12px;
    display: block;
    background-color: burlywood;
    color:violet;
    text-align: center;
    text-decoration: none;
}
ul li a:hover {
    background-color: teal;
}
#myCanvas {
    width: 600px;
    height: 600px;
    background-color: azure;
}