body {
    margin: 0;
    font-family: Arial, sans-serif;
}
.top-panel {
    background-color: #333;
    color: white;
    padding: 15px;
    font-size: 24px;
    font-weight: bold;
}
.side-panel {
    height: 100vh;
    width: 250px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #111;
    padding-top: 20px;
}
.side-panel a {
    padding: 10px 15px;
    text-decoration: none;
    font-size: 18px;
    color: white;
    display: block;
}
.side-panel a:hover {
    background-color: #575757;
}
.content {
    margin-left: 0px;
    padding: 20px;
}