html{
    background-color: aquamarine;
}
h1{
    color: black;
    font-size: 3em;
    background-color: white;
    border-radius: 10px;
    margin-right: 73%;
    border-style: solid;

}
button{
    font-size: 2em;
}
.card{
    display: block;
    font-size: 2em;
}
.date{
    background-color: blue;
}
.title{
    background-color: black;
    color: white;
}
.additional-data{
    background-color:darkcyan;
}
.undisplayed{
    display: none;
}