main.css

.gutter.gutter-horizontal {
  cursor:ew-resize;
}
.gutter.gutter-vertical {
  cursor:s-resize;
}
.dropbtn {
  background-color: #4CAF50;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

.dropbtn:hover, .dropbtn:focus {
  background-color: #3e8e41;
}

#myInput {
  border-box: box-sizing;
  background-position: 14px 12px;
  background-repeat: no-repeat;
  font-size: 16px;
  background-color: #3c434f;
  width: 100%;
  padding: 14px 20px 12px 45px;
  border: none;
  color: white;
}

#myInput:focus {}

.dropdown {
  position: relative;
  display: inline-block;
  width: 100%;
  height: 100%;
}

.dropdown-content {
  position: absolute;
  background-color: #282d35;
  min-width: 230px;
  overflow: auto;
  border: 1px solid #ddd;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.dropdown-content a {
  color: white;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown a:hover {
  background-color: #3c434f;
}

.show {
  display: block;
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 25px;
  background: #38373f;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  background: #4CAF50;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  background: #4CAF50;
  cursor: pointer;
}

/* Preloader */

#preloader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #292929;
  /* change if the mask should have another color then white */
  z-index: 99;
  /* makes sure it stays on top */
}

#status {
  width: 500px;
  height: 500px;
  position: absolute;
  left: 50%;
  /* centers the loading animation horizontally one the screen */
  top: 50%;
  /* centers the loading animation vertically one the screen */
  background-image: url(https://78.media.tumblr.com/cbb15b0bbe00ad8c0ed9b66123cebf41/tumblr_nrecy93dpQ1rpb2rfo1_500.gif);
  /* path to your loading animation */
  background-repeat: no-repeat;
  background-position: center;
  margin: -250px 0 0 -250px;
  /* is width and height divided by two */
}