/* CHECKBOX TRICK */
.icon-menu label {
      opacity: 0;
      cursor: pointer
}
#toggle {
      position: absolute;
      z-index: 2;
      cursor: pointer;
      opacity: 0;
}
#toggle:checked+.navbar {
      display: block;
      left: 0;
      top: 0;
      transition: 0.3s ease;
}

#left-panel {
      display: flex;
      flex-direction: column;
      position: fixed;

      left: 0;
      flex-basis: border-box;
}