form {
    width: 450px;
}

form > div {
    margin: 0.5rem auto;
    display: flex;
}

input {
    flex-grow: 2;
    border-top: none;
    border-right: none;
    border-left: none;
    text-align: right;
    border-bottom-width: 1px;
}

table,
th,
td {
    border: 1px solid black;
    border-collapse: collapse;

}

th,
td {
    padding: 4px;
}

th a {
    font-size: 0.5rem;
}

tr > td:first-of-type {
    text-align: center;
}