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

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-height: 100vh;
}

.color-box {
  width: 100%;
  height: 100vh;
  background-color: rgb(0, 0, 0);
  position: relative;
}

.controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  top: 50%;
  left: 50%;
  position: absolute;
  transform: translate(-50%, -50%);
}

label {
  font-size: 18px;
  margin-bottom: 10px;
}

input[type="range"] {
  width: 200px;
  margin-bottom: 20px;
}