.crm-contribution-main-form-block {
  display: flex;
  /* Ensures wrapping on small screens */
  flex-wrap: wrap;
}
/* Desktop layout */
.crm-contribution-main-form-block #intro_text {
  flex: 0 0 60%;
  padding-right: 2em;
}
.crm-contribution-main-form-block > .crm-radiobuttons-sideform {
  flex: 0 0 35%;
}
/* Mobile layout */
@media (max-width: 768px) {
  .crm-contribution-main-form-block #intro_text {
    padding-right: 0;
  }
  .crm-contribution-main-form-block > * {
    /* Stack vertically on smaller screens */
    flex: 0 0 100% !important;
  }
}
/* Images in the intro text */
.crm-contribution-main-form-block #intro_text img {
  width: 100% !important;
  height: auto !important;
}
/* Do not float form labels */
.crm-container .crm-section .label {
  float: none;
  width: 100%;
  text-align: inherit;
}
.crm-container .crm-section .content {
  margin-left: inherit;
}
/* Full-width inputs */
.crm-container .content:not(.other_amount-content) input.crm-form-text {
  width: 100%;
}