nav {
    height: 15%;
    background-color: #212529;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 30px;
}
img {
    width: 100%;
}
nav .left {
    width: 80px;
}
nav .left a {
    width: 100%;
}
nav .center{
    font-size:30px;
}