Default formbutton styles.

formbutton-default.css

body {
  font-family: sans-serif;
  font-size: 100%;
  line-height: 1;
  font-weight: 400;
}
#formbutton-shim {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.1);
  cursor: pointer;
}
#formbutton-modalContainer {
  position: fixed;
  width: 320px;
  right: 22px;
  bottom: 104px;
  transform: translate(0, 5%);
  transition-property: transform;
  transition-duration: 0.2s;
  transition-timing-function: ease-out;
  cursor: default;
}
@media(max-width: 480px) {
  #formbutton-modalContainer {
    width: 276px;
  }
}
@media (max-width: 375px) {
  #formbutton-modalContainer {
    width: 100% !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
  }
}
#formbutton-modalContainer.visible {
  transform: translate(0, 0);
}
#formbutton-modal {
  background: #F9F9F8;
  border-radius: 12px;
  box-shadow: 5px 5px 22px rgba(22, 22, 22, 0.2);
  line-height: 1.2;
  overflow: auto;
  max-height: 100vh;
}
#formbutton-title {
  padding:  22px 22px;
  background: #c4001a;
  border-radius: 12px 12px 0 0;
  color: white;
  font-weight: bold;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
}
#formbutton-title.has-description {
  padding: 33px 22px;
}
#formbutton-title.empty {
  justify-content: flex-end;
}
@media(min-width: 375px) {
  #formbutton-title.empty {
    display: none;
  }
}
#formbutton-title i {
  font-size: 2.5rem;
  margin-right: 1.5rem;
  font-style: normal;
}
#formbutton-closeButton {
  margin-left: auto;
  color: transparent;  
  background: transparent;
  border: none;
  text-shadow:
    0 0 0 white,
    -1px -1px 0 rgba(0,0,0, 0.2),  
    1px -1px 0 rgba(0,0,0, 0.2),
    -1px 1px 0 rgba(0,0,0, 0.2),
    1px 1px 0 rgba(0,0,0, 0.2);  
  appearance: none;
  -moz-appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}
#formbutton-closeButton::after {
  content: "❌"
}
#formbutton-description {
  margin: -0.75rem 22px 0;
  padding: 1rem 1rem;
  background: rgb(254, 254, 254);
  box-shadow: 0 1px 3px rgba(22, 22, 22, 0.2);
  border-radius: 3px;
}
#formbutton-body {
  padding: 22px;
}
#formbutton-formContainer {
  position: relative;
}
#formbutton-formStatus {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  height: 100%;
  visibility: hidden;
  opacity: 0;
  background: #F9F9F8;
  transition-property: opacity;
  transition-duration: 0.2s;
  transition-timing-function: ease-out;
}
#formbutton-formStatus a.hover-gray {
  padding: 8px 16px;
  border-radius: 15px;
  transition: all 75ms ease 0s;
}
#formbutton-formStatus a.hover-gray:hover {
  background: rgb(242, 242, 242);
}
#formbutton-form .field {
  white-space: nowrap;
}
#formbutton-form .field:not(:first-child) {
  padding-top: 22px;
}
#formbutton-form .field.radioField, 
#formbutton-form .field.checkboxField {
  padding-left: 1px;
}
#formbutton-form .field.radioField {
  padding-top: 6px;
}
#formbutton-form label {
  display: inline-block;
  white-space: normal;
}
#formbutton-form .field > label:first-child {
  margin-bottom: 6px;
}
#formbutton-form input,
#formbutton-form select,
#formbutton-form textarea,
#formbutton-form button,
#formbutton-form #card-element {
  font-family: inherit;
  font-size: 100%;
  color: inherit;
  display: block;
  box-sizing: border-box;
  width: 100%;
  -webkit-appearance: none;
  -moz-appearance: none;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 3px;
  background: rgb(254, 254, 254);
}
#formbutton-form input:not([type="submit"]):not([type="reset"]),
#formbutton-form select,
#formbutton-form textarea,
#formbutton-form #card-element {
  padding: 0.75rem 1rem;
}
#formbutton-form input:not([type="submit"]):not([type="reset"])::placeholder,
#formbutton-form select::placeholder,
#formbutton-form textarea::placeholder {
  color: rgba(0,0,0,0.4)
}
#formbutton-form input:focus:not([type="radio"]):not([type="checkbox"]),
#formbutton-form select:focus,
#formbutton-form textarea:focus {
  background: white;
}
#formbutton-form textarea {
  min-height: 6rem;
}
#formbutton-form button,
#formbutton-form [type="submit"],
#formbutton-form [type="reset"] {
  padding: 0.65rem 0.75rem 0.6rem;
  width: auto;
  cursor: pointer;
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;
  transition-property: background-color;
  transition-duration: 0.2s;
  transition-timing-function: ease-out;
  position: relative;
  z-index: 1;
}
#formbutton-form button:hover,
#formbutton-form [type="submit"]:hover,
#formbutton-form [type="reset"]:hover {
  background-color: rgba(0, 0, 0, 0.1);
}
#formbutton-form select {
  text-transform: none;
}
#formbutton-form [type="checkbox"],
#formbutton-form [type="radio"] {
  width: auto;
  margin: 0 0.5em 0 0;
  display: inline-block;
  vertical-align: top;
}
#formbutton-form [type="checkbox"] {
  -webkit-appearance: checkbox;
  -moz-appearance: checkbox;
  appearance: checkbox;
}
#formbutton-form [type="radio"] {
  -webkit-appearance: radio;
  -moz-appearance: radio;
  appearance: radio;
}
#formbutton-modal input:focus,
#formbutton-modal select:focus,
#formbutton-modal textarea:focus, 
#formbutton-modal button:focus,
#formbutton-modal [type="submit"]:focus,
#formbutton-modal [type="reset"]:focus {
  outline: 1px dotted #212121; 
  outline: 5px auto -webkit-focus-ring-color;
}
#formbutton-modal input::-moz-focus-inner,
#formbutton-modal select::-moz-focus-inner,
#formbutton-modal textarea::-moz-focus-inner, 
#formbutton-modal button::-moz-focus-inner,
#formbutton-modal [type="submit"]::-moz-focus-inner,
#formbutton-modal [type="reset"]::-moz-focus-inner {
  outline: 1px dotted #212121; 
}
#formbutton-modal.no-outline input:focus,
#formbutton-modal.no-outline select:focus,
#formbutton-modal.no-outline textarea:focus, 
#formbutton-modal.no-outline button:focus,
#formbutton-modal.no-outline [type="submit"]:focus,
#formbutton-modal.no-outline [type="reset"]:focus {
  outline: none;
}