html, body {
    height: 100%;
    font-family: 'Roboto', sans-serif;
}

html {
    display: table;
    margin: auto;
}

body {
    /* display: table-cell; */
    vertical-align: middle;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
}

.main-box {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.checkout {
    width: 450px;
    box-shadow: 0 0 0 1px #6655ff;
    border-radius: 5px;
}

.product {
    padding: 6px 10px
}

    .product p {
        font-size: medium;
    }

#create-payment-link-btn {
    width: 100%;
    height: 36px;
    background-color: #6655ff;
    color: white;
    border: none;
    border-bottom-left-radius: 4px;
    border-bottom-right-radius: 4px;
    font-size: medium;
    cursor: pointer;
}

#result {
    font-family: Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}

    #result td, #result th {
        border: 1px solid #ddd;
        padding: 8px;
    }

    #result tr:nth-child(even) {
        background-color: #f2f2f2;
    }

    #result tr:hover {
        background-color: #ddd;
    }

    #result th {
        padding-top: 12px;
        padding-bottom: 12px;
        text-align: left;
        background-color: #6655ff;
        color: white;
    }

#query-string-table {
    width: 50%;
}

.payment-titlte {
    color: #6655ff;
    font-size: larger;
}

#return-page-btn {
    margin-top: 10px;
    border: 1px solid #6655ff;
    border-radius: 5px;
    background-color: #6655ff;
    padding: 10px 8px;
    color: white;
    text-decoration: none;
    font-size: small;
}