.topnav {
    font-family: "Chivo Mono", monospace;
    overflow: hidden;
    position: fixed;
    top: 0;
    width: 100%;
    gap: 72px;
    opacity: 70%;
    background-color: rgba(0, 0, 0, 0.514);
    backdrop-filter: blur(20px) saturate(160%) contrast(45%) brightness(140%);
    -webkit-backdrop-filter: blur(20px) saturate(160%) contrast(45%) brightness(140%);
    z-index: 2
}
  
.topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    transition: 0.5s ease;
    height: 25px;
}
  
.topnav a:hover {
    background-color: #ddd;
    color: black;
}
  
.topnav a.active {
    background-color: #038C73;
    color: white;
}
  
.topnav .icon {
    display: none;
}

.topnav .acesso {
    float: right;
    border: 1px solid rgb(255, 255, 255);
    border-left: 0;
    border-top: 0;
    border-bottom: 0;
}

.topnav  a  img{
    width: 120px;
    height: 100%;
}


.main {
    padding: 16px;
    margin-top: 30px;
    height: 1500px; 
}

@media screen and (max-width: 700px) {
    .topnav a:not(:first-child) {display: none;}
    .topnav a.icon {
        float: right;
        display: block;
    }
}

@media screen and (max-width: 700px) {
    .topnav.responsive {position: relative;}
    .topnav.responsive a.icon {
        position: absolute;
        right: 0;
        top: 0;
    }
    .topnav.responsive a {
        float: none;
        display: block;
        text-align: left;
    }
}