body {
    font-family: sans-serif;
}
.top_nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    z-index: 10000;
    //display: flex;
    //flex-direction: column;
    //justify-content: center;
    //align-items: flex-start;
    border-bottom: 2.5px solid blue;
    background-color: white;
}
.top_selection {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    font-size: 20px;
}
.top_marquee {
    background-color: #eee;
}
.top_logo {
    width: 48px;
    height: 48px;
}
.content {
    margin-top: 110px;
    height: 100%;
}
a {
    text-decoration: none;
}
.top_a {
    color: green;
    background-color: yellow;
    text-align: center;
}