* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

ul,
li {
    padding: 0;
    margin: 0;
    list-style: none;
}

a {
    text-decoration: none;
    color: #000;
}

.iconnav i {
    color: #fff;
    font-size: 20px;
    display: none;
}

.topnav {
    background-color: #000;
    position: relative;
}

.topnav ul {
    display: flex;
    justify-content: center;
    align-items: center;
}

.topnav a {
    display: block;
    padding: 10px 20px;
    color: #fff;
}

.topnav a:hover {
    background-color: aqua;
}

@media screen and (max-width: 740px) {
    .topnav ul {
        flex-direction: column;
        justify-content: flex-start;
    }

    .topnav li {
        width: 100%;
        text-align: left;
    }

    .iconnav {
        position: absolute;
        top: 0;
        right: 0;
        display: block;
        padding: 10px;
    }

    .iconnav i {
        display: block;
    }

    .search-bar input {
        height: 30px;
    }
}