How to align images

import { useState } from 'react'
import { useLocation, useNavigate } from 'react-router-dom'
import './Checkout.css'

function Checkout({ user }) {
  const location = useLocation()
  const navigate  = useNavigate()
  const basket    = location.state?.basket || []
  const [success, setSuccess] = useState(false)
  const [error,   setError]   = useState('')

  const total = basket.reduce((sum, item) => {
    return sum + item.product_price * item.quantity
  }, 0)

  const placeOrder = async () => {
    if (!user) { navigate('/login'); return }

    const res = await fetch('/api/orders', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        customerID: user.customerID,
        items: basket.map(item => ({
          productID: item.productID,
          quantity:  item.quantity
        }))
      })
    })

    const data = await res.json()
    if (!res.ok) { setError(data.error); return }
    setSuccess(true)
  }

  if (success) {
    return (
      <div className="page">
        <h1>Order Placed!</h1>
        <p>Thank you for your order.</p>
        <button className="order-btn" onClick={() => navigate('/orders')}>
          View My Orders
        </button>
      </div>
    )
  }

  return (
    <div className="page">
      <h1>Checkout</h1>
      {basket.length === 0 ? <p>Your basket is empty.</p> : (
        <>
          {basket.map((item, index) => (
            <div key={index} className="checkout-item">
              <p className="item-name">{item.product_name}</p>
              <p>Quantity: {item.quantity}</p>
              <p>£{(item.product_price * item.quantity).toFixed(2)}</p>
            </div>
          ))}
          <div className="checkout-total">
            <h2>Total: £{total.toFixed(2)}</h2>
          </div>
          {error && <p className="error">{error}</p>}
          <button className="order-btn" onClick={placeOrder}>Place Order</button>
        </>
      )}
    </div>
  )
}

export default Checkout

.page { padding: 30px; }
.page h1 { margin-bottom: 20px; }

.checkout-item {
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 10px;
  max-width: 500px;
}

.item-name { font-weight: 700; margin-bottom: 5px; color: #144A5C; }

.checkout-total { margin: 20px 0; }
.checkout-total h2 { color: #A2C24A; }

.error {
  color: white;
  background: red;
  padding: 10px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.order-btn {
  background: #A2C24A;
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  font-family: 'Gluten', cursive;
}