body,html{
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    font-family: "Comic Sans MS","Microsoft JhengHei";
    color: #333;
}

.all{
    display: flex;
    height: 100%;
}

a{
    text-decoration: none;
    color: #ffffff;
    font-size: 20px;
}

.menu{
    flex: 0 1 350px;
    background-color: #515151;
    color: #ffffff;
    padding: 50px 0;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.content{
    background-color: #f6f0e0;
    flex: 1 1 500px;
    position: relative;
}

iframe{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.fixed{
    position: fixed;
    width: 200px;
    height: 150px;
    top: 0;
    right: 0;
}