body { font-size:14px; font-family:Arial, Sans-serif;margin:0; padding: 0;background:orange;}
body,html{height:100%; box-sizing:border-box; }

div.top{height:15vh;position:relative;background:orange;border-radius: 0 0 30px/20px 0;}
div.leftmenu{float:left;position:relative; width:15%;background:orange;height:85vh;border-radius: 0 0 20px/30px 0;}
div.body { float:left; background:#D9FFD4;border-radius:30px/20px 0 0 0;box-sizing:border-box;min-height:85vh; width:85%; position:relative;padding:0 0 0 0;margin:0 0 0 0}
div.rightblock{float:right; position: absolute; width:15%;background:#D9FFD4;height:100%;margin-left:85%}
div.downblock{float:right; position: absolute; width:15%;background:#D9FFD4;height:100%}