Centrer zone de saisie

Bonjour, tu peux partager ton code?

DOCTYPE html>
<html lang="en">
<head>
<title>Search</title>
</head>
<body>
<form

action="http://images.google.com/images"> <input type="text" name="q" /> <input type="submit" value="search" /> </form>

</form>
</body>
</html>

En HTML:

<html lang="en">
<head>
<title>Search</title>
</head>
<body>
<form action="http://images.google.com/images" class= test> <input type="text" name="q" /> <input type="submit" value="search" /> </form>


</form>
</body>
</html>

en CSS:

.test{
   margin: auto;
   width: 50%;
  padding: 10px;
}

Merci à toi beam1916