body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.box {
    background-color: #ffffff;
    border: 2px solid #4CAF50;
    padding: 20px;
    margin: 10px;
    width: 80%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

h1 {
    color: #4CAF50;
    text-align: center;
}

p {
    color: #333;
    line-height: 1.6;
}

.signature {
    text-align: left;
    margin-top: 20px;
    font-style: italic;
    color: #4CAF50;
    font-size: 1.2em;
    margin-bottom: 0;
}