style.css

body { font: 16px Consolas; }

#byte_range { margin: 15px; padding: 10px;
    box-shadow: 0 0 3px purple; 
    max-width: 400px; }

#byte_content {
    margin: 15px 0 0 0; padding: 10px;
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
  box-shadow: 0 0 3px purple; 
    max-width: 700px; 
  }
  .Ilabel{
    background-color: indigo;
    color: white;
    padding: 0.5rem;
    font-family: sans-serif;
    border-radius: 0.3rem;
    cursor: pointer;
    margin-top: 1rem;

  }

#file-chosen{
  margin-left: 0.3rem;
  font-family: sans-serif;
}
  .list {
  position: relative;
  float: left;
  display: inline-block;
  -webkit-box-shadow: 0 2px 10px #666;
  box-shadow: 0 2px 10px #666;
  margin: 40px 0 0 30px;
  border-radius: 5px;
  
}

.inputList {
  position: relative;
  float: left;
  display: inline-block;
  -webkit-box-shadow: 0 2px 10px #666;
  box-shadow: 0 2px 10px #666;
  margin: 20px 0 0 30px;
  border-radius: 5px;

}

.Buttons  {
  position: relative;
  display: inline-block;
  margin: 20px 0 0 30px;
  border-radius: 5px;

}
ul {
  padding: 0;
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
  max-height: 210px;
}
li {
  border-bottom: 1px solid #d1d1d1;
  list-style: none;
  padding: 0 22.5px;
  line-height: 44px;
  background-color: #eee;
  cursor: pointer;
}
li:hover {
  background-color: #d1d1d1;
}
li:last-child {
  border-bottom-width: 0;
}
li:nth-child(5) ~ :last-child {
  position: relative;
  z-index: 1;
}
li:nth-child(5) ~ :nth-last-child(2):after {
  content: '';
  cursor: s-resize;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: -webkit-linear-gradient(top, rgba(255,255,255,0) 0%, #fff 100%);
  background: -moz-linear-gradient(top, rgba(255,255,255,0) 0%, #fff 100%);
  background: -o-linear-gradient(top, rgba(255,255,255,0) 0%, #fff 100%);
  background: -ms-linear-gradient(top, rgba(255,255,255,0) 0%, #fff 100%);
  background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, #fff 100%);
  height: 45px;
}