*{
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}
html{
    width: 100%;
    height: 100%;
}
body{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction:column;
}
.head{
    height: 5em;
	padding: 0 10%;
	background: #17b5fe;
}
.head .my-logo{
	height: 100%;
	width: 15%;
	background-image: url("../img/my-logo.png");
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100% 100%;
}
.iframe-middle{
    height: calc(100% - 5em);
}