body{
    background-image: url(/Users/user1/Desktop/sr/image/bg.jpg);
    margin:auto;
    padding:auto;
    font-family: "system-ui" ;
}

#container{
    display:flex;
    flex-wrap:wrap;
    width:1000px;
    margin-left: auto;
    margin-right: auto;
    margin-top: auto;
    margin-bottom: auto;
    box-sizing: content-box;
    padding: 1%;
    border:7px solid #666;
    justify-content: space-around;

}

header{
    background-color:240, 255, 255, 0.5;
    width: 900px;
    height:200px;
}

.header{
    box-sizing: border-box;
    padding: 5%;
    border:3px solid #666;
}

aside{
    float:left;
    width:400px;
    height:auto;
    background-color:250, 235, 215, 0.5;
    background-color:rgba(255,255,255,0.8);
}

.aside{
    box-sizing: border-box;
    border:3px solid #666;
    margin: 1%;
    padding: 5%;
    justify-content: space-around;

}

main{
    float: right;
    display:flex;
    flex-wrap:wrap;
    width:400px;
    height: auto;
    background-color:245, 245, 220, 0.5;
    padding: 5%;
    background-color:rgba(255,255,255,0.8);
}

.main{
    box-sizing: content-box;
    border:3px solid #666;
    margin: 1%;
}

main div{
    display:inline-block;
    width:900px;
    height: auto;
    background-color:244, 255, 59, 0.5;
    margin: 1%;
}

.div{
    box-sizing:border-box;
    padding:1%;
    border:3px solid #666;
    justify-content: space-around;

}