body {
    font-family: Arial, sans-serif;
    text-align: center;
}

#calculator {
    width: 370px;
    margin: 0 auto;
}

.medicine-entry {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 10px;
}

input[type="text"],
input[type="number"],
input[type="date"] {
    width: 65%;
    padding: 5px;
    margin-bottom: 10px;
}

button {
    background-color: #007BFF;
    color: #fff;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
}

#total {
    margin-top: 20px;
}

#total-amount {
    font-weight: bold;
    font-size: 1.2em;
}