body { 
    font-family: Arial, sans-serif; 
    line-height: 1.6; 
}
.container { 
    width: 80%; 
    margin: 0 auto; 
    overflow: hidden; 
}
header { 
    background: #333; 
    color: #fff; 
    padding: 20px; 
    text-align: center; 
}
header img {
    height: 100px;
    width: auto;
}
footer { 
    background: #333; 
    color: #fff; 
    text-align: center; 
    padding: 10px; 
    margin-top: 20px; 
}
button {
    display: block;
    width: 200px;
    padding: 10px;
    margin: 20px auto;
    background-color: #4CAF50; /* Green */
    color: white;
    border: 2px solid #4CAF50; /* Green border */
    border-radius: 5px; /* Rounded corners */
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
}
button:hover {
    background-color: white;
    color: #4CAF50;
    border-color: #4CAF50;
}