*{
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}
button{
    background-color: black;
    color: white;
    padding: 0.6rem;
    font-weight: bold;
}
.input_area{
    padding: .5rem;
    border: 1px solid;
    width: 8rem;
    height: 2.5rem;
}
.title{
    font-size: 1.5rem;
}