body {
text-align: center;
background-color: #EF5B9F;
}


#container {
width: 760px;
height: 420px;
position: absolute;
margin-top: 0px;
top: 0px;
left: 50px;
}

#blue_box {
width: 100%;
height: 241px;
background-color: #00A3F5;
position: absolute;
top: 0px;
left: 0px;
}