.w3-main{
    max-width: 1000px;
    margin: auto;
}

.w3-teal{
    top:0px;
    padding: 10px;
    margin-bottom: 10px;
}

.w3-container{
    position: relative;
    border: 2px solid blue;
    border-radius: 25px;
    background-color: blue;
    box-shadow: 5px 10px 18px black;
}