body{font-family:Arial,sans-serif;line-height:1.6;margin:0 auto;padding-left:20px;padding-right:20px}h1{text-align:center}.nav-bar{text-align:center;margin-bottom:20px;font-size:1.3em}.nav-bar a{text-decoration:none;color:#007BFF;padding:0 1px;font-weight:800}.nav-bar a:hover{text-decoration:underline}h2{background-color:#f4f4f4;padding:10px;border-left:5px solid #007BFF;margin-top:20px;display:flex;justify-content:space-between;align-items:center}h2 a.back-to-top{font-size:0.5em;color:#007BFF;text-decoration:none;font-style:italic;font-weight:200}h2 a.back-to-top:hover{text-decoration:underline}h3{color:#333;margin-top:15px}p{margin:10px 0}