.menu {
    list-style-type: none;
    display: flex;
    justify-content: center;
}

.menu__item {
    margin-right: 20px;
}

.menu__item:last-of-type {
    margin-right: 0;
}

.menu__link {
    color: #fff;
    padding: 2px 6px;
    border: 2px solid #555;
    border-radius: 6px;
}

.menu__link:hover {
    border: 2px solid #fff;
}



.up {
    position: fixed;
    display: block;
    bottom: 50px;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center;
    text-decoration: none;
    border-radius: 50%;
    background: navy;
    color: gold;
    cursor: pointer;
    box-shadow: 0 0 5px 2px hsla(0, 100%, 100%, 0.2);
    right: 50px;
  }
  .up:hover  {
    box-shadow: 0 0 5px 4px hsla(0, 100%, 100%, 0.5);
  }