.tcc-calculator {
    max-width: 420px;
    padding: 16px;
    border: 1px solid #ddd;
    background: #fafafa;
}
.tcc-calculator label {
    font-weight: bold;
    display: block;
    margin-top: 10px;
}
.tcc-calculator input,
.tcc-calculator select {
    width: 100%;
    padding: 8px;
    margin-top: 4px;
}
.tcc-calculator button {
    margin-top: 15px;
    padding: 10px;
    width: 100%;
    cursor: pointer;
}