.topnav {
    background-color: white;
    overflow: hidden;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: flex-start;
    padding: 40px 0 10px 60px;
    border-bottom: 1px solid #ccc;
    padding: 10px 0;
}

.topnav a {
    color: #000;
    padding: 14px 20px;
    text-decoration: none;
    font-weight: bold;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.topnav a:hover {
    background-color: #ddd;
    border-radius: 4px;
}