perling/public/assets/sass/components/_modal.scss

.modal {
  &-header {
    border-color: var(--input-form-light);
    .btn-close {
      margin-inline-start: auto;
      margin-inline-end: 0;
    }
  }
  &-content {
    background-color: var(--white);
  }
  &-footer {
    border-color: var(--input-form-light);
  }
}