.navv {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    width: 15%;
    max-width: 200px;
    background-color: #fff;
    z-index: 999;
    overflow-y: auto;
    will-change: transform;
    backface-visibility: hidden;
    border-right: 1px solid rgba(0, 0, 0, 0.14)
}

.navv li:hover {
    background-color: rgba(0, 0, 0, 0.05)
}

.navv li {
    display: flex;
    justify-content: center;

    line-height: 44px;
    width: 100%;
}

.navv li a {
    margin: 5px auto;
    width: 100%;
    text-align: center;
}

.container {
    margin-left: 300px;
}