html, body{
    height: 100%;
    margin: 0;
    background: #fafafa;
}
.container{
    display: flex;
    justify-content: center;
    align-content: center;
    flex-direction: column;

}
.item{
    margin: auto;
}

.header{
    font-family: "Calibri";
    font-size: 30pt;
    margin-top: 20px;
}
#start{
    font-family: "Calibri";
    width: 200px;
    height: 100px;
    font-size: 25pt;
    background: white;
    border: 1px silver solid;
    border-radius: 10px;
    box-shadow: rgb(200, 200, 200) 0px 0px 8px 3px;
}
#slots{
    box-shadow: rgb(200, 200, 200) 0px 0px 8px 3px;
    margin-top: 5em ;
    margin-bottom: 20px;
    border: 4px black solid;
}