To change the appearance of form fields, you can use CSS. Here is an example:
1. Changing the background color and text color:
```
input[type=text], select, textarea {
background-color: #f9f9f9;
color: #555;
}
```
1. Changing the font family and size:
```
input[type=text], select, textarea {
font-family: Arial, sans-serif;
font-size: 18px;
}
```
1. Added some padding:
```
input[type=text], select, textarea {
padding: 12px;
}
```
1. Adding a border:
```
input[type=text], select, textarea {
border: 1px solid #ccc;
}
```
1. Adding a hover effect:
```
input[type=text]:hover, select:hover, textarea:hover {
border-color: #888;
}
```
You can also do the same for the submit button in the form, example:
1. Changing the background color, text color, and removing the default styling:
```
input[type=submit] {
background-color: #4CAF50;
color: white;
cursor: pointer;
border: none;
}
```
1. Adding hover effect:
```
input[type=submit]:hover {
background-color: #45a049;
}
```
Remember that in most cases you have to use a class or id to select the correct form because it could affect other forms on the same page if you do not specify it correctly.