.mainbody{
    max-width: 800px;
    margin: 20px auto;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    
    margin: 0 auto;
    padding: 0px;
    background-color: #f9f9f9;
}
h1 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}
h2 {
    color: #2980b9;
    margin-top: 30px;
}
h3 {
    color: #16a085;
    margin-top: 20px;
}
ul {
    margin-bottom: 15px;
}
li {
    margin-bottom: 5px;
}
.section {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}
.highlight {
    background-color: #fffacd;
    padding: 2px 5px;
    border-radius: 3px;
}
.footer-contact {
    font-weight: bold;
    color: #c0392b;
}
a {
    color: #3498db;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}