style.css

.fullWidth {
    width: 100%;
}

.overflowHidden {
    overflow: hidden;
}

.companyBlock {
    float: right;
}

.billTo {
    float: left;
    margin-left: 15px;
}

.numberAndPeriod {
    float: right;
    margin-right: 15px;
}

.invoiceDetails {
    border-bottom: 1px solid black; 
    margin-bottom: 150px;
    padding-bottom: 10px;
    border-top: 1px solid black; 
    margin-top: 30px;
    padding-top: 10px;
    font-size: 1.15em;
}

.accent {
    display: inline;
    color: rgb(165, 28, 48);
    font-weight: bold;
}

.invoiceNumber {
    display: inline;
    font-size: 1.2em;
    font-weight: bold;
}

table {
    border-collapse: collapse;
    width: 90%;
    margin-right: 5%;
    margin-left: 5%;
    font-size: 1.15em;
}

td, th {
    text-align: left;
    padding: 8px;
}

.lowerBorder {
    border-bottom: 1px solid black;
}

th {
    font-weight: bold;
}

.alightRight {
    text-align: right;
}

.paymentBlock {
    margin-top: 150px;
    height: 175px;
}

.paymentBlockLeft {
    float: left;
    width: 49%;
    margin-right: 1%;
    height: 100%;
}

.paymentBlockRight {
    padding-left: 1%;
    float: right;
    width: 49%;
    height: 100%;
    border-left: 1px solid black;
}

.paymentQR {
    float: right;
    height: 100%;
}

.paymentInformation {
    float: left;
    height: 100%;
}

.fullHeight {
    height: 100%;
}

.centerFlex {
    display: -webkit-box;
    -webkit-box-align: center;
}

img {
    width: 150px;
    height: 150px;
}

.highlight {
    background-color: #e9e9e9;
}