html, body, #app {
  height: 100%;
}

.background {
  height: 100%;
  text-align: center;
  overflow: hidden;
  position: relative;
}

.title {
  color: #ffffff;
  font-family: verdana;
  text-align: center;
  margin: 0;
  padding: 30px 0;
  opacity: 0.9;
}

.color-selector {
  display: inline-block;
  margin: 0 auto;
  border-radius: 3px;
  position: relative;
  padding: 6px 32px 6px 10px;
  font-family: verdana;
  background: white;
}
.color-selector::after {
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 5px 0 5px;
  border-color: black transparent transparent transparent;
  position: absolute;
  right: 10px;
  top: 17px;
}
.color-selector .circle {
  display: inline-block;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid #eee;
  margin-right: 10px;
}
.color-selector .hidden {
  position: absolute;
  left: 0;
  opacity: 0;
}
.color-selector span {
  display: inline-block;
  vertical-align: middle;
}

.overlay {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  top: 105px;
  transition: 1s;
}
.overlay.active {
  top: calc(-50% + 105px);
  width: 160%;
  height: 160%;
  left: -30%;
}



input[type='checkbox'] {
  display: none;
}
.wrap-collabsible {
  margin: 1.2rem 0;
}
.lbl-toggle {
  display: block;
  font-weight: bold;
  font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1.2rem;
  text-transform: none;
  text-align: center;
  padding: 1rem;
  color: black;
  background: rgba(128, 128, 128, 0);
  cursor: pointer;
  border-radius: 7px;
  transition: all 0.25s ease-out;
}
.lbl-toggle:hover {
  color: grey;
}
.lbl-toggle::before {
  content: ' ';
  display: inline-block;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 5px solid currentColor;
  vertical-align: middle;
  margin-right: .7rem;
  transform: translateY(-2px);
  transition: transform .2s ease-out;
}
.toggle:checked+.lbl-toggle::before {
  transform: rotate(90deg) translateX(-3px);
}
.collapsible-content {
  max-height: 0px;
  overflow: auto;
  transition: max-height .25s ease-in-out;
}
.toggle:checked + .lbl-toggle + .collapsible-content {
  max-height: 350px;
}
.toggle:checked+.lbl-toggle {
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.collapsible-content .content-inner {
  background: grey(0, 105, 255, .2);
  border-bottom: 1px solid grey;
  border-bottom-left-radius: 7px;
  border-bottom-right-radius: 7px;
  padding: .5rem 1rem;
}
.collapsible-content p {
  margin-bottom: 0;
}