.menu {
    position: fixed;
    z-index: 50;

    left: 0;
    top: 80px;
    height: calc(100% - 80px);
    width: 256px;

    background-color: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

.menu h4 {
    padding: 10px;
}

.nav-list li {
    padding: 5px 20px;
}

.more-item {
    padding: 5px 20px;
    color: #666;
    font-size: 14px;
    cursor: pointer;
}

.friend-item {
    cursor: pointer;
}

.menu button {
    background: none;
    color: #333;
    width: 100%;
    height: 100%;
    padding: 0;
    text-align: left;
}