body {  
    background-color: #f0f8ff;  
    font-family: 'Arial', sans-serif;  
    line-height: 1.6;  
    color: #333;  
}  

h1, h2, h3 {  
    color: #5a9;  
}  

a {  
    color: #009688;  
    text-decoration: none;  
}  

a:hover {  
    text-decoration: underline;  
}  

button, input[type="submit"] {  
    background-color: #4caf50;  
    color: white;  
    border: none;  
    padding: 10px 20px;  
    cursor: pointer;  
    border-radius: 5px;  
}  

button:hover, input[type="submit"]:hover {  
    background-color: #45a049;  
}  

footer {  
    background-color: #333;  
    color: white;  
    padding: 10px 0;  
    text-align: center;  
}  

.container {  
    max-width: 800px;  
    margin: 0 auto;  
    padding: 20px;  
}