* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.container.curtain-container {
  position: relative;
  margin-top: 10%;
  width: 18rem;
  height: 9rem;
  background-color: #f7f7f7;
  border-radius: 5px;
  box-shadow: 10px 10px 30px 15px rgba(0, 0, 0, 0.247);
}

.open-container {
  position: absolute;
  width: 18rem;
  background-color: #f79071;
  border-radius: 5px;
}

.slider {
  -webkit-appearance: none;
  width: 9rem;
  position: absolute;
  left: 75%;
  top: 50%;
  transform: translateY(-50%) rotateZ(90deg);
  background: transparent;
  outline: none;
}

.slider::-webkit-slider-runnable-track {
  -webkit-appearance: none;
  height: 5px;
  background-color: #1b1c1d;
  border-radius: 50px;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #1b1c1d;
  position: relative;
  transition: all;
  top: -5.5px;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.span-open {
  -webkit-user-select: none;
  font-family: "Lato", Sans-serif;
  font-weight: bold;
  font-size: 3rem;
  text-emphasis: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}