RESPONSIVE CARD
Run
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HTML</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
   .container {
      display: flex;
	  flex-wrap: wrap;
	  padding: 16px;
	  
   }
   input[type="text"], select {
	   display: inline-block;
	   width: 90%;
	   margin-bottom: 20px;
	   padding: 12px;
	   border: 1px solid #ccc;
	   border-radius: 3px;
	}
	label {
	   margin-left: 20px;
	   display: block;
	}
	
	.formfield {
	  flex: 25%;
	  max-width: 25%;
	  margin: 5px;
      background-color: #2efccd;
      padding: 5px 20px 15px 20px;
      border: 1px solid rgb(191, 246, 250);
      border-radius: 3px;
	  
	}
	.pay {
	  background-color: #00cc00;
	  padding: 8px;
	  font-size: 15px;
	  width: 70%;
	}
	.pay:hover {
	  background-color: #cccccc;
	}
	p {
	  background-color: white;
	  padding : 16px;
	}
	.icon-container {
	  margin: 20px;
	  padding: 7px 0;
	  font-size: 50px;
	}
	@media screen and (max-width: 700px) {
	  .formfield {
		flex: 100%;
		max-width: 100%;
		
	  }
	  .container {
	    flex-direction: column;
	  }
	  .container :nth-child(1) {order:1;}
	  .container :nth-child(2) {order:3;}
	  .container :nth-child(3) {order:2;}
	}
	
</style>
</head>  
<body>
   <div class= "container">
     <div class="formfield">
      <form>
	    
			<h2> Billing Form </h2>
			<label for="fname">Full Name</label>
			<input type="text" id="fname" name="fname">
			<label for="email"> Email</label>
			<input type="text" id="email" name="email">
			<label for="add"> Address</label>
			<input type="text" id="add" name="address">
			
		</form>
	  </div>
		<div class="formfield">
		 <form>
			<h3>Payment</h3>
			<label for="fname">Accepted Cards</label>
			<div class="icon-container">
              <i class="fa fa-cc-visa" style="color:navy;"></i>
              <i class="fa fa-cc-amex" style="color:blue;"></i>
              <i class="fa fa-cc-mastercard" style="color:red;"></i>
              <i class="fa fa-cc-discover" style="color:orange;"></i>
            </div>
			<label for="cname">Name on Card</label>
			<input type="text" id="cname" name="cardname">
			<label for="ccnum">Card number</label>
			<input type="text" id="ccnum" name="cardnumber">
			<div class="payment">
				<div>
					<label for="expyear">Exp Year</label>
					<select name="Year" id="Year">
					  <option value="2021">2021</option>
					  <option value="2022">2022</option>
					  <option value="2023">2023</option>
					  <option value="2024">2024</option>
					</select>
				</div>
				<div>
					<label for="cvv">CVV</label>
					<input type="text" id="cvv" name="cvv" placeholder="cvv">
				</div>
			</div>
		<input type="submit" value="Continue to pay" class="pay">
       </form>
   </div>

   <div class="formfield">
		<h4> Cart Items </h4>
		<p>
			<a style="text-decoration: none;" href="#">Product 1</a><span class="price">Rs 500</span>
		</p>
		<p>
		  <a style="text-decoration: none;" href="#">Product 2</a><span class="price"> Rs 200</span>
		</p>
		<p>
		   Total <span class="price" style="color:black">  Rs 250</span>
		</p>
	</div>
   
  </div>
	
</body>
</html>