JSFiddle - React, Tailwind, and code Playground

HTML

<div class="input-container">
  <input class="login" placeholder="login">
  <input class="password" placeholder="password">
</div>

CSS

html, body {
    height: 100%;
}
.input-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
}