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

header {
    background-color: #333;
    color: #fff;
    padding: 15px 20px;
    text-align: center;
}

nav {
    background-color: #444;
    overflow: hidden;
}

nav a {
    float: left;
    display: block;
    color: #fff;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
}

nav a:hover {
    background-color: #555;
}

.container {
    padding: 20px;
}

.experience, .course {
    background-color: #fff;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.experience h3, .course h3 {
    margin-top: 0;
}

.experience ul, .course ul {
    padding-left: 20px;
}

footer {
    text-align: center;
    padding: 10px 0;
    background-color: #333;
    color: #fff;
}