CSS: Slider

I'm starting in Web programming, and I'm customizing the MyAnimeList list. I have access only to CSS, and wanted to edit some effects. I have the following screen:

Tomaketheupper-leftbarwork,thefollowingcodesareused:

HTML

<divclass="list-menu-float"><a class="icon-menu profile" href="https://myanimelist.net/profile/pipowss" style="background-image: url(https://myanimelist.cdn-dena.com/images/userimages/6568742.jpg);">
    </a>
    <a class="icon-menu quick-add List_LightBox" href="https://myanimelist.net/addtolist.php?hidenav=1">
      <svg class="icon icon-quick-add" width="22px" height="20px" viewBox="0 0 22 20" version="1.1">
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        </g>
      </svg>
      <span class="text">Quick Add</span>
    </a>
    <a class="icon-menu anime-list" href="https://myanimelist.net/animelist/pipowss?">
      <svg class="icon icon-anime-list" width="22px" height="20px" viewBox="0 0 22 20" version="1.1">
        <g>
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          <path d="M15.0024414,5.50830078 L17.0112305,5.50830078 L16.0229492,2.39306641 L15.0024414,5.50830078 Z M15.1044922,0.583007812 L16.9736328,0.583007812 L19.7773438,8.5 L17.9833984,8.5 L17.4731445,6.87255859 L14.5566406,6.87255859 L14.0087891,8.5 L12.2792969,8.5 L15.1044922,0.583007812 Z" id="A"></path>
        </g>
      </svg>
      <span class="text">Anime List</span>
    </a>
    <a class="icon-menu manga-list" href="https://myanimelist.net/mangalist/pipowss?">
      <svg class="icon icon-manga-list" width="22px" height="20px" viewBox="0 0 22 20" version="1.1">
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          <path d="M18.0854492,0.583007812 L20.4648438,0.583007812 L20.4648438,8.5 L18.9233398,8.5 L18.9233398,3.14501953 C18.9233398,2.99104741 18.9251302,2.77531063 18.9287109,2.49780273 C18.9322917,2.22029484 18.934082,2.00634841 18.934082,1.85595703 L17.4355469,8.5 L15.8295898,8.5 L14.3417969,1.85595703 C14.3417969,2.00634841 14.3435872,2.22029484 14.347168,2.49780273 C14.3507487,2.77531063 14.3525391,2.99104741 14.3525391,3.14501953 L14.3525391,8.5 L12.8110352,8.5 L12.8110352,0.583007812 L15.2172852,0.583007812 L16.6567383,6.80810547 L18.0854492,0.583007812 Z" id="M"></path>
        </g>
      </svg>
      <span class="text">Manga List</span>
    </a>
    <a class="icon-menu history" href="/history/pipowss">
      <svg class="icon icon-history" width="21px" height="21px" viewBox="0 0 21 21" version="1.1">
        <g transform="translate(-1.000000, -154.000000)">
          <path d="M2.115,162.749 C2.272,162.906 2.452,162.996 2.676,162.996 L8.288,162.996 C8.647,162.996 8.894,162.817 9.028,162.48 C9.163,162.166 9.118,161.874 8.849,161.627 L7.143,159.899 C7.726,159.338 8.4,158.911 9.141,158.619 C9.904,158.328 10.689,158.17 11.497,158.17 C12.373,158.17 13.181,158.35 13.966,158.687 C14.774,159.023 15.448,159.472 16.031,160.056 C16.593,160.639 17.041,161.313 17.378,162.098 C17.715,162.884 17.894,163.715 17.894,164.59 C17.894,165.465 17.715,166.296 17.378,167.081 C17.041,167.867 16.593,168.54 16.031,169.124 C15.448,169.685 14.774,170.134 13.966,170.471 C13.181,170.807 12.373,170.987 11.497,170.987 C10.51,170.987 9.567,170.762 8.669,170.336 C7.794,169.91 7.053,169.303 6.447,168.518 C6.38,168.428 6.29,168.383 6.155,168.361 C6.021,168.361 5.908,168.406 5.841,168.473 L4.113,170.201 C4.045,170.269 4.023,170.358 4.023,170.448 C4,170.56 4.045,170.65 4.09,170.74 C5.01,171.84 6.11,172.693 7.412,173.299 C8.692,173.905 10.061,174.197 11.497,174.197 C12.799,174.197 14.034,173.95 15.223,173.433 C16.413,172.917 17.423,172.244 18.298,171.391 C19.151,170.516 19.825,169.505 20.341,168.316 C20.857,167.126 21.104,165.892 21.104,164.59 C21.104,163.288 20.857,162.054 20.341,160.864 C19.825,159.674 19.151,158.642 18.298,157.789 C17.423,156.913 16.413,156.24 15.223,155.724 C14.034,155.208 12.799,154.961 11.497,154.961 C10.263,154.961 9.073,155.185 7.928,155.657 C6.784,156.128 5.774,156.779 4.876,157.609 L3.237,155.993 C2.99,155.746 2.699,155.679 2.384,155.836 C2.048,155.971 1.868,156.218 1.868,156.577 L1.868,162.188 C1.868,162.413 1.958,162.592 2.115,162.749 L2.115,162.749 Z M8.4,166.879 C8.467,166.947 8.579,166.992 8.692,166.992 L12.687,166.992 C12.799,166.992 12.911,166.947 12.979,166.879 C13.046,166.812 13.091,166.7 13.091,166.588 L13.091,160.999 C13.091,160.886 13.046,160.774 12.979,160.707 C12.911,160.639 12.799,160.595 12.687,160.595 L11.901,160.595 C11.789,160.595 11.677,160.639 11.61,160.707 C11.542,160.774 11.497,160.886 11.497,160.999 L11.497,165.398 L8.692,165.398 C8.579,165.398 8.467,165.443 8.4,165.51 C8.332,165.577 8.288,165.69 8.288,165.802 L8.288,166.588 C8.288,166.7 8.332,166.812 8.4,166.879 L8.4,166.879 Z" id="icon_menu_side_history" sketch:type="MSShapeGroup"></path>
        </g>
      </svg>
      <span class="text">History</span>
    </a>
    <a class="icon-menu export" href="https://myanimelist.net/panel.php?go=export">
      <svg class="icon icon-export" width="21px" height="24px" viewBox="0 0 21 24" version="1.1">
        <g transform="translate(0.000000, -253.000000)">
          <path d="M1.229,275.994 C1.454,276.24 1.745,276.353 2.082,276.353 L18.916,276.353 C19.231,276.353 19.522,276.24 19.769,275.994 C19.994,275.769 20.106,275.477 20.106,275.141 L20.106,261.92 L13.305,261.92 C12.968,261.92 12.676,261.808 12.452,261.561 C12.205,261.337 12.093,261.045 12.093,260.708 L12.093,253.907 L2.082,253.907 C1.745,253.907 1.454,254.019 1.229,254.244 C0.982,254.491 0.87,254.783 0.87,255.097 L0.87,275.141 C0.87,275.477 0.982,275.769 1.229,275.994 L1.229,275.994 Z M19.612,260.326 C19.5,260.124 19.365,259.99 19.253,259.855 L14.158,254.76 C14.023,254.648 13.888,254.513 13.686,254.401 L13.686,260.326 L19.612,260.326 L19.612,260.326 Z" id="icon_menu_side_export" sketch:type="MSShapeGroup"></path>
        </g>
      </svg>
      <span class="text">Export</span>
    </a>
    <form action="https://myanimelist.net/logout.php" method="post">
      <a class="icon-menu logout" href="javascript:void(0);" onclick="$(this).parent().submit();">
        <svg class="icon icon-logout" width="20px" height="17px" viewBox="0 0 20 17" version="1.1">
          <g transform="translate(-2.000000, -306.000000)">
            <path d="M3.121,321.395 C3.817,322.091 4.67,322.45 5.658,322.45 L9.676,322.45 C9.788,322.45 9.878,322.428 9.923,322.36 C9.99,322.315 10.035,322.226 10.057,322.136 C10.08,322.024 10.08,321.911 10.102,321.844 C10.102,321.754 10.102,321.642 10.08,321.507 L10.08,321.26 C10.08,321.193 10.057,321.126 10.057,321.081 C10.035,321.036 10.012,321.013 9.967,320.969 C9.923,320.946 9.878,320.924 9.855,320.901 C9.833,320.879 9.788,320.879 9.721,320.879 C9.653,320.856 9.608,320.856 9.563,320.856 L9.406,320.856 L9.272,320.856 L5.658,320.856 C5.119,320.856 4.648,320.654 4.244,320.273 C3.862,319.869 3.66,319.397 3.66,318.859 L3.66,310.015 C3.66,309.476 3.862,309.005 4.244,308.601 C4.648,308.219 5.119,308.017 5.658,308.017 L9.676,308.017 C9.788,308.017 9.878,307.995 9.923,307.928 C9.99,307.883 10.035,307.793 10.057,307.703 C10.08,307.591 10.08,307.479 10.102,307.411 C10.102,307.322 10.102,307.209 10.08,307.075 L10.08,306.828 C10.08,306.716 10.035,306.626 9.945,306.536 C9.878,306.469 9.788,306.424 9.676,306.424 L5.658,306.424 C4.67,306.424 3.817,306.783 3.121,307.479 C2.426,308.197 2.066,309.027 2.066,310.038 L2.066,318.836 C2.066,319.846 2.426,320.677 3.121,321.395 L3.121,321.395 Z M7.117,317.4 C7.274,317.557 7.454,317.647 7.678,317.647 L13.289,317.647 L13.289,321.238 C13.289,321.462 13.379,321.642 13.536,321.799 C13.693,321.956 13.873,322.046 14.097,322.046 C14.299,322.046 14.501,321.956 14.659,321.799 L21.46,314.998 C21.617,314.841 21.707,314.661 21.707,314.437 C21.707,314.212 21.617,314.033 21.46,313.876 L14.659,307.075 C14.501,306.918 14.299,306.828 14.097,306.828 C13.873,306.828 13.693,306.918 13.536,307.075 C13.379,307.232 13.289,307.411 13.289,307.636 L13.289,311.227 L7.678,311.227 C7.454,311.227 7.274,311.317 7.117,311.474 C6.96,311.631 6.87,311.811 6.87,312.035 L6.87,316.839 C6.87,317.063 6.96,317.243 7.117,317.4 L7.117,317.4 Z" id="icon_menu_side_logout" sketch:type="MSShapeGroup"></path>
          </g>
        </svg>
        <span class="text">Logout</span>
      </a>
    </form>
    <div class="icon-menu setting">
      <svg class="icon icon-setting" width="21px" height="24px" viewBox="0 0 21 24" version="1.1">
        <g transform="translate(-1.000000, -402.000000)">
          <path d="M1.958,414.151 C2.025,414.241 2.115,414.286 2.227,414.308 L4.517,414.645 C4.652,415.049 4.809,415.476 5.033,415.88 C4.898,416.104 4.674,416.396 4.36,416.778 C4.068,417.159 3.844,417.428 3.731,417.608 C3.664,417.698 3.619,417.788 3.619,417.9 C3.619,418.012 3.664,418.102 3.709,418.192 C4.046,418.641 4.719,419.336 5.774,420.279 C5.864,420.391 5.976,420.436 6.088,420.436 C6.223,420.436 6.313,420.391 6.402,420.324 L8.176,418.977 C8.512,419.157 8.894,419.291 9.298,419.426 L9.657,421.738 C9.657,421.85 9.724,421.94 9.792,422.007 C9.882,422.075 9.994,422.12 10.106,422.12 L12.889,422.12 C13.136,422.12 13.271,422.007 13.338,421.76 C13.45,421.356 13.563,420.571 13.697,419.426 C14.079,419.314 14.46,419.157 14.819,418.955 L16.548,420.324 C16.66,420.391 16.772,420.436 16.884,420.436 C17.064,420.436 17.446,420.122 18.052,419.538 C18.658,418.932 19.084,418.483 19.309,418.192 C19.376,418.102 19.421,418.012 19.421,417.9 C19.421,417.788 19.376,417.675 19.286,417.586 C18.68,416.845 18.231,416.261 17.939,415.857 C18.119,415.543 18.276,415.161 18.433,414.713 L20.745,414.353 C20.857,414.353 20.947,414.286 21.014,414.196 C21.082,414.106 21.104,414.017 21.104,413.904 L21.104,411.144 C21.104,411.031 21.082,410.942 21.014,410.852 C20.947,410.762 20.857,410.717 20.745,410.695 L18.456,410.336 C18.321,409.932 18.141,409.528 17.939,409.124 C18.074,408.899 18.299,408.607 18.613,408.226 C18.905,407.844 19.129,407.575 19.241,407.395 C19.309,407.305 19.354,407.216 19.354,407.103 C19.354,406.991 19.309,406.901 19.264,406.834 C18.949,406.408 18.276,405.689 17.199,404.702 C17.086,404.612 16.997,404.567 16.884,404.567 C16.75,404.567 16.66,404.612 16.57,404.679 L14.797,406.026 C14.46,405.846 14.079,405.712 13.675,405.577 L13.338,403.265 C13.338,403.153 13.271,403.063 13.203,402.996 C13.114,402.929 13.001,402.884 12.889,402.884 L10.106,402.884 C9.859,402.884 9.724,402.996 9.657,403.243 C9.545,403.647 9.433,404.432 9.298,405.577 C8.894,405.689 8.512,405.846 8.153,406.048 L6.425,404.702 C6.313,404.612 6.2,404.567 6.088,404.567 C5.909,404.567 5.505,404.881 4.898,405.465 C4.293,406.071 3.888,406.52 3.664,406.812 C3.597,406.924 3.552,407.036 3.552,407.103 C3.552,407.216 3.597,407.305 3.686,407.418 C4.248,408.091 4.696,408.675 5.033,409.146 C4.809,409.528 4.652,409.909 4.539,410.291 L2.205,410.65 C2.115,410.65 2.025,410.717 1.958,410.807 C1.891,410.897 1.868,410.987 1.868,411.099 L1.868,413.86 C1.868,413.972 1.891,414.062 1.958,414.151 L1.958,414.151 Z M11.498,409.303 C12.373,409.303 13.136,409.617 13.765,410.246 C14.371,410.874 14.685,411.615 14.685,412.49 C14.685,413.388 14.371,414.129 13.765,414.757 C13.136,415.386 12.373,415.7 11.498,415.7 C10.622,415.7 9.859,415.386 9.231,414.757 C8.602,414.129 8.288,413.388 8.288,412.49 C8.288,411.615 8.602,410.874 9.231,410.246 C9.859,409.617 10.622,409.303 11.498,409.303 L11.498,409.303 Z" id="icon_menu_side_setting" sketch:type="MSShapeGroup"></path>
        </g>
      </svg>
      <span class="text">
        <a class="link-list-setting" href="https://myanimelist.net/editprofile.php?go=listpreferences">List Settings</a>
        <a class="link-style-setting" href="https://myanimelist.net/ownlist/style">Style Settings</a>
      </span>
    </div>
</div>

CSS

.list-menu-float {
    position: fixed;
    display: block;
    top: 0%;
    width: 50px;
    border: #EBEBEB 1px solid;
    z-index: 2;
    float: initial;
}

.list-menu-float .icon-menu {
    position: relative;
    background-color: #f6f6f6;
    display: block;
    width: 50px;
    height: 50px;
    opacity: 1;
    -moz-transition-property: all;
    -o-transition-property: all;
    -webkit-transition-property: all;
    transition-property: all;
    -moz-transition-duration: 0.3s;
    -o-transition-duration: 0.3s;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -moz-transition-timing-function: ease-in-out;
    -o-transition-timing-function: ease-in-out;
    -webkit-transition-timing-function: ease-in-out;
    transition-timing-function: ease-in-out;
}

/* SVG */

.list-menu-float .icon-menu svg.icon {
    position: absolute;
    fill: #323232;
}

.list-menu-float .icon-menu:hover svg.icon {
    position: absolute;
    fill: #ffffff;
}

.list-menu-float .icon-menu.profile {
    background-size: cover;
}

.list-menu-float .icon-menu.quick-add {}

.list-menu-float .icon-menu.quick-add svg.icon-quick-add {
    left: 13px;
    top: 12px;
}

...

I want to make the elements of the bar hidden, leaving only the image visible, and when you hover the cursor (% w / o%), the bar slides from top to bottom and is the same as the image. How can I do this?

Edit
To make it clear, I can not edit the HTML file, nor the site folder, just CSS.