.sidebar-nav {
    margin-top: 20px;
    padding: 0;
    list-style: none;
  }

  .thumbnail {
    display: inline-block;
    position: relative;
    width: 50px;
    height: 50px;
    margin: 10px;
    overflow: hidden;
  }
  
  .thumbnail:hover img {
    transform: scale(1.25);
  }
  
  .thumbnail:hover::before {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.25);
    z-index: 1;
  }
  
  .thumbnail:hover::after {
    content: attr(data-content);
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 20px;
    z-index: 2;
  }
  
  .material-link {
    text-decoration: none; /* Removes the underline */
    color: inherit; /* Inherits the color from the parent element */
    cursor: pointer; /* Adds a pointer cursor on hover */
  }

  .success {
    color: green;
    /*transition: all ease-in .5s;*/
}

.error {
    color: red;
    /*transition: all ease-in .5s;*/
}