material design text input with styled-components

Input.js

import React from 'react'
import styled from 'styled-components'

const Wrapper = styled.div`
  position: relative;
  width: 100%;
  padding-bottom: 2rem;

  input:focus ~ label,
  input:valid ~ label {
    font-size: 0.8rem;
    color: #1976d2;
    top: -0.5rem;
  }
`
const Error = styled.div`
  position: absolute;
  left: 0.7rem;
  right: auto;
  font-size: 95%;
  color: #ff9c9c;
`

const FieldLabel = styled.label`
  position: absolute;
  display: block;
  pointer-events: none;
  color: rgba(0, 0, 0, 0.54);
  top: 0.75rem;
  -webkit-transition: 0.2s ease-in;
  transition: 0.2s ease-in;
  z-index: 1;
  color: #999;
`
const InputField = styled.input`
  line-height: 2em;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.42);
  -webkit-transition: 0.2s ease-in;
  transition: 0.2s ease-in;
  width: 100%;

  :focus {
    outline: none;
    border-bottom: 1px solid #1976d2;
  }
`

const Input = ({ label, error, ...rest }) => (
  <Wrapper>
    <InputField required {...rest} />
    <FieldLabel>{label}</FieldLabel>
    {error && <Error>{error}</Error>}
  </Wrapper>
)

export default Input