* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    /* height: 100vh;   */
    /* overflow: hidden; */
    margin: 20px;
}
.container {
    width: 100%;
    height: 650px;
    /* position: relative; */
    /* overflow: hidden; */
    overflow-y: scroll;
    border: 1px solid #3a8df5;
}
.contextmenu {
    position: absolute;
    width: 200px;
    margin: 0;
    padding: 0;
    background: #ffffff;
    border-radius: 5px;
    list-style: none;
    box-shadow: 0 15px 35px rgba(50, 50, 90, 0.1),
        0 5px 15px rgba(0, 0, 0, 0.07);
    z-index: 999999;
    display: none;
}

.container ul ul {
  display:none;
  position:absolute;
}

.contextmenu li {
    border-left: 3px solid transparent;
    transition: all 0.2s ease-out;
}

.contextmenu li {
    display: block;
    padding: 10px;
    color: #333;
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    position: relative;
}

.contextmenu li:hover {
    background: #eee;
    border-left: 3px solid #3a8df5;
    cursor: pointer;
}

.contextmenu li:hover {
    color: #333;
}