.divider {
  display: flex;
}
.divider:before, .divider:after {
  content: "";
  flex: 1;
}

.line {
  align-items: center;
	margin-bottom: 0;
}
.line:before, .line:after {
  height: 1px;
  margin: 0 1em;
}

.one-line:before, .one-line:after {
  background: black;
}

.razor:before, .razor:after {
  box-shadow: 0 0.5px 0 black;
}

.double-razor:before, .double-razor:after {
  height: 3px;
  box-shadow: 0 -0.5px 0 black, 0 0.5px 0 black;
  border-width: 0;
}