.zpform-container .zpform-outer li:nth-last-child(2) .zpform-field-container {
  font-size: 20px; 
}
/* Success message */
.zpform-container .zpform-outer li:nth-last-child(2) .zpform-field-container[style*="green"] {
  color: black !important;
  font-weight: bold !important;
  font-size: 14px !important;
}

/* Error message  */
.zpform-container .zpform-outer li:nth-last-child(2) .zpform-field-container[style*="red"] {
  color: brown !important;
  font-weight: bold !important;
  font-size: 14px !important;
}