JSFiddle - React, Tailwind, and code Playground

HTML

<form class="orderform" method="" action="" >
   <div class="cell">
       <label for="user-name">Ваше имя</label>
       <input id="user-name" name="user-name" value="" type="text">
   </div>
   <div class="cell">
       <label for="phone-number">Ваш телефон</label>
       <input id="phone-number" name="phone-number" value="" type="text">
   </div>
         <button type="submit">Вызвать мастера</button>
</form>

CSS

.cell{
    display: table-cell;
    width: 200px;
}
button[type='submit']{
    display:block;
    width: auto;
    margin: 15px auto;
    padding: 5px;
}
form{
    border: 3px solid yellow;
    padding: 5px;
}