html, body {
  padding: 0;
  width: 100%;
  margin: 0;
}

* {
  font-family: sans-serif;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

body form {
  text-align: center;
  background: #eaeaea;
  height: 100vh;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -ms-flex-line-pack: center;
      align-content: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  gap: 10px;
}
body form input {
  width: 300px !important;
  padding: 10px;
  border: none;
  background: #fff;
}