.background-image {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 1;

  display: block;
  
  background-image:  
  					linear-gradient(
      					rgba(232, 232, 232, 0.55),
     					rgba(255, 255, 255, 0.55)
    				),
    				/* bottom, image */

   						 url(https://humanlink.files.wordpress.com/2008/10/picture-141.png);
  
  width: 100%;
  height: 100%;

  -webkit-filter: blur(6px);
  -moz-filter: blur(5px);
  -o-filter: blur(5px);
  -ms-filter: blur(5px);
  
  filter: blur(5px);
}

.content {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 9999;
  margin-left: 20px;
  margin-right: 20px;
}

.tcon {
  appearance: none;
  border: none;
  cursor: pointer;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  height: 40px;
  transition: 0.3s;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  width: 40px;
  background: transparent;
  outline: none; }
  .tcon > * {
    display: block; }
  .tcon:hover, .tcon:focus {
    outline: none; }
  .tcon::-moz-focus-inner {
    border: 0; }

.tcon-plus {
  height: 40px;
  position: relative;
  -webkit-transform: scale(.75);
  transform: scale(.75);
  width: 40px; }
  .tcon-plus::before, .tcon-plus::after {
    content: "";
    border-radius: 2px;
    display: block;
    width: 85%;
    height: 25%;
    position: absolute;
    top: 37%;
    left: 8%;
    transition: 0.3s;
    background: #333; }
  .tcon-plus:after {
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg); }

.tcon-plus--minus.tcon-transform::before {
  -webkit-transform: rotate(180deg) translate(0, 0);
  transform: rotate(180deg) translate(0, 0);
  width: 62%; }
.tcon-plus--minus.tcon-transform::after {
  -webkit-transform: rotate(-180deg) translate(-37.5%, 0);
  transform: rotate(-180deg) translate(-37.5%, 0);
  width: 62%; }

.tcon-visuallyhidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px; }
  .tcon-visuallyhidden:active, .tcon-visuallyhidden:focus {
    clip: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    position: static;
    width: auto; }