body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}
header {
    background-color: #333;
    color: white;
    padding: 10px 0;
    text-align: center;
}
h1 {
    margin: 0;
}
main {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
section {
    margin-bottom: 20px;
}
h2 {
    color: #333;
}
ul {
    padding-left: 20px;
}
code {
    background-color: #eee;
    padding: 2px 4px;
    border-radius: 3px;
}
footer {
    text-align: center;
    padding: 10px;
    background-color: #333;
    color: white;
    position: fixed;
    bottom: 0;
    width: 100%;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    text-align: center;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 20px 0;
    display: inline-block;
}


button:hover {
    background-color: #45a049;
}