JSFiddle - React, Tailwind, and code Playground

by Sova

HTML

Some page

<script data-sw-partner="1" data-sw-widget="custom-form" data-sw-btn="Узнать стоимость" data-sw-utm="some utm" src="https://d1uw69x4c2zrim.cloudfront.net/js/widgets/custom-form.min.js" async></script>

CSS

* {
  box-sizing: border-box;
}

.sw-custom-order-form__form {
  display: block;
  padding: 15px;
  border: solid 1px #ddd;
  border-radius: 5px;
  max-width: 300px;
  margin-top: 15px;
}

.sw-custom-order-form__form > *:not(:last-child) {
  margin-bottom: 15px;
}

.sw-custom-order-form__form input, .sw-custom-order-form__form select {
  display: block;
  padding: 8px 15px;
  line-height: 1.8;
  width: 100%;
  border: 1px solid #ddd;
  border-radius: 5px;
  color: #3d424d;
  font: inherit;
  transition: color .25s ease-out,border-color .25s ease-out,background .25s ease-out,background-color .25s ease-out,opacity .25s ease-out;
  -webkit-appearance: none;
  outline: 0!important;
}

.sw-custom-order-form__form input:focus,
.sw-custom-order-form__form select:focus {
  border-color: #ffa726;
}

.sw-custom-order-form__form button {
  display: flex;
  align-items: center;
  border-radius: 3px;
  box-shadow: none;
  border: 2px solid transparent;
  background: transparent;
  transition: .25s ease-out;
  color: #fff;
  line-height: 17px;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  padding: 10px;
  font-size: 16px;
  color: white;
  background-color: #3598dc;
  cursor: pointer;
}

.sw-custom-order-form__form button:hover {
  background-color: #60aee4;
}

JavaScript

https://jsfiddle.net/hfmcoyjL/#