Integration with Zuora payment page

body, td, input, textarea, select {
  font-family: 'Roboto', 'Helvetica', 'Arial', sans-serif;
  font-size: 14px;
  color: rgba(0, 0, 0, 0.87);
}

input, select {
  vertical-align: middle;
  border-radius: 4px;
  border: 1px solid #ccc;
  box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
  height: 36px;
  padding: 0 12px;
}

select {
  background: #fff;
}

input.hint {
  color: #888;
}

label {
  display: block;
  padding-left: 8px;
  color: darkblue; /* Updated field names text color to dark blue */
}

h3 {
  color: rgba(0, 0, 0, 0.54);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.334;
  letter-spacing: 0em;
  margin: 1rem 0;
}

h2, label {
  color: rgba(0, 0, 0, 0.54);
}

body {
  margin: 8px;
}

.form {
  padding: 24px 16px;
  margin: 0 auto;
}

.invalid {
  border: 1px solid #f44336;
}

.form-group {
  margin-bottom: 16px;
}

.form-element {
  display: inline-block;
  padding-left: 1px;
  min-width: 270px;
}

.form-element.required {
  border-left: 4px solid #3f51b5;
  padding: 2px;
}

.form-group .error {
  margin: 4px 0 5px 140px;
  color: darkred; /* Updated error text color to dark red */
  font-size: 12px;
}

.popup {
  background-color: #fafafa;
}

.popup .form {
  padding: 0;
  width: 100%;
  border-radius: 8px;
}

.popup .form h2 {
  padding: 16px;
  margin: 0 auto;
  background-color: #eeeeee;
  border-bottom: 1px solid #d5d5d5;
}

.popup .form h3 {
  padding: 16px;
  margin-top: 0;
  border-bottom: 0;
}

.popup .form .content {
  padding: 16px;
  margin: 0 auto;
}

a {
  text-decoration: none;
}

a.modalCloseImg {
  background: url(Images/hpm/icon-close.gif) no-repeat;
  width: 7px;
  height: 7px;
  display: inline;
  position: absolute;
  top: 13px;
  right: 13px;
  cursor: pointer;
}

.required-desc {
  float: right;
  margin-top: 11px;
  border-left: 4px solid #3f51b5;
  min-width: 120px;
}

.spacer {
  padding: 2px;
}

#btn-submit {
  float: right;
  margin-right: 16px;
}

.error {
  font-size: 12px;
  color: darkred; /* Updated error text color to dark red */
  margin: -8px 0 5px 0;
}

.date-separator {
  font-size: 12px;
}

.bottom {
  margin-top: 15px;
  overflow: hidden;
}

.form .desc {
  margin-bottom: 16px;
  margin-top: 5px;
}

.popup .form .desc {
  margin-left: 16px;
  margin-right: 16px;
}

.tooltip-text {
  font-size: 12px;
}

.image-cvv {
  cursor: pointer;
  top: -3px;
}

.image-cvv-position {
  position: relative;
}

.image-cvv-des {
  position: absolute;
  top: 28px;
  left: 120px;
  z-index: 20;
  border: 1px solid #e8e8e8;
}

.btn-submit {
  display: inline-block;
  padding: 9px 20px;
  color: white;
  font-weight: bold;
  font-size: 12px;
  border-radius: 3px;
  background-color: #3f51b5;
}

.btn-submit.disabled {
  background-color: #e0e0e0;
  pointer-events: none;
  cursor: default;
}

.MuiPaper-root {
  background-color: #fff;
  transition: box-shadow 280ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0px 3px 1px -2px rgba(0, 0, 0, 0.2), 0px 2px 2px 0px rgba(0, 0, 0, 0.14), 0px 1px 5px 0px rgba(0, 0, 0, 0.12);
  border-radius: 8px;
  padding: 24px;
}

.MuiButton-root {
  color: rgba(0, 0, 0, 0.87);
  font-size: 0.875rem;
  min-width: 64px;
  box-sizing: border-box;
  transition: background-color 280ms cubic-bezier(0.4, 0, 0.2, 1);
  line-height: 1.75;
  text-transform: uppercase;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 4px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  background-color: transparent;
  border: none;
  cursor: pointer;
}

.MuiButton-containedPrimary {
  color: #fff;
  background-color: #3f51b5;
}

.MuiButton-textPrimary {
  color: #3f51b5;
}

.MuiIconButton-root {
  color: rgba(0, 0, 0, 0.54);
  padding: 8px;
  border-radius: 50%;
  transition: background-color 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

.MuiTypography-h3 {
  font-size: 2.25rem;
  font-weight: 400;
  line-height: 1.167;
  letter-spacing: 0em;
  margin: 1rem 0;
}

.MuiAlert-root {
  display: flex;
  padding: 6px 16px;
  border-radius: 4px;
  background-color: #e0f7fa;
  color: #006064;
}

.MuiAlert-icon {
  margin-right: 12px;
  padding: 7px 0;
  display: flex;
  font-size: 22px;
  opacity: 0.9;
}

.MuiSvgIcon-root {
  fill: currentColor;
  width: 1em;
  height: 1em;
  display: inline-block;
  font-size: 1.5rem;
  transition: fill 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.MuiGrid-root {
  margin: 0;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  box-sizing: border-box;
}

.MuiGrid-item {
  margin: 0;
  box-sizing: border-box;
}

.MuiGrid-container {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  box-sizing: border-box;
}