body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: #f4f6f9;
    color: #333;
}
header {
    background: #004d66;
    color: white;
    padding: 30px 0;
    text-align: center;
}
.profile-pic {
    width: 140px;
    border-radius: 50%;
    border: 3px solid #fff;
    margin-bottom: 10px;
}
nav {
    background: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
}
nav a {
    color: #f4f6f9;
    margin: 0 20px;
    text-decoration: none;
    font-weight: bold;
}
section {
    padding: 25px;
    max-width: 900px;
    margin: auto;
}
h2 {
    color: #004d66;
    border-bottom: 2px solid #ccc;
    padding-bottom: 5px;
}
a.btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background-color: #0099cc;
    color: white;
    text-decoration: none;
    border-radius: 6px;
}
a.btn:hover {
    background-color: #007399;
}
ul {
    list-style-type: none;
    padding: 0;
}
ul li {
    margin-bottom: 20px;
}