body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
    padding: 20px;
    margin-right: 20%;
    margin-left: 20%;
}

.header {
    background-color: #4CAF50;
    color: white;
    padding: 10px 0;
    font-size: 35px;
    font-weight: bold;
    text-align: center;
    border-radius: 5px;
}

.main {
    background-color: white;
    margin: 20px 0;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    border-radius: 5px;
}

.footer {
    background-color: #888;
    color: white;
    margin: 20px 0;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    border-radius: 5px;
}