body {
  font-family: sans-serif;
}
.line {
  position: relative;
}
.line-mask {
  position: absolute;
  top: 0;
  left: 0;
  background-color: #1b1a1d;
  opacity: 0.75;
  width: 100%;
  height: 100%;
  z-index: 2;
}