* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 2rem;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.content {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 1rem;
}

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

footer {
    text-align: center;
    padding: 1rem;
    color: #666;
    font-size: 0.9rem;
}