body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #333;
}

a {
    color: #337ab7;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    margin-bottom: 10px;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 20px;
    background-color: #333;
    color: #fff;
}

footer a {
    color: #fff;
}

.whatsapp-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25D366;
    color: white;
    padding: 15px;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1000;
    text-decoration: none;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.whatsapp-button:hover {
    background-color: #128C7E;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    main {
        padding: 10px;
        margin: 10px;
    }

    .whatsapp-button {
        bottom: 15px;
        right: 15px;
        padding: 12px;
        font-size: 20px;
    }
}