body{
    font-family:'Segoe UI',sans-serif;
    margin:0;
    padding:0;
    background:#f4f4f4;
    color:#333;
    text-align:center;
}
header{
    background-color:#0a66c2;
    color:white;
    padding:30px 10px;
}
main{
    padding:20px;
}
.breakpoints ol{
    list-style:none;
    padding:0;
}
.breakpoints li{
    background:#fff;
    margin:10px auto;
    padding:10px;
    border-radius:8px;
    width:80%;
    box-shadow:0 2px 5px rgba(0,0,0,0.1);


}