lbry.tech/app/sass/init/_mixins.scss

@mixin center {
  align-items: center;
  display: inline-flex;
  justify-content: center;
}

@mixin clearfix {
  clear: both;
  content: "";
  display: block;
}

@mixin ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@mixin font-mono {
  font-family: "Input Mono", "Fira Mono", "Fira Code", "Courier New", monospace;
}

@mixin font-sans {
  font-family: "Inter UI", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

@mixin font-serif {
  font-family: Georgia, serif;
}

@mixin hide-text {
  border: none;
  color: transparent;
  font: 0 / 0 a;
  text-shadow: none;
}

@mixin no-user-select {
  user-select: none;

  -ms-user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
}

@mixin selection($background-color, $text-color) {
  &::selection {
    background-color: $background-color;
    color: $text-color;
    text-shadow: none;
  }

  &::-moz-selection {
    background-color: $background-color;
    color: $text-color;
    text-shadow: none;
  }
}

@mixin underline($text-color: #000, $whitespace-color: #fff) {
  @include selection($text-color, $whitespace-color);

  background-image: linear-gradient($whitespace-color, $whitespace-color), linear-gradient($whitespace-color, $whitespace-color), linear-gradient($text-color, $text-color);
  background-position: 0 88%, 100% 88%, 0 88%;
  background-repeat: no-repeat, no-repeat, repeat-x;
  background-size: 0.05rem 1px, 0.05rem 1px, 1px 1px;
  box-decoration-break: clone;
  display: inline;
  text-decoration: none;
  text-shadow: 0.03rem 0 $whitespace-color, -0.03rem 0 $whitespace-color, 0 0.03rem $whitespace-color, 0 -0.03rem $whitespace-color, 0.06rem 0 $whitespace-color, -0.06rem 0 $whitespace-color, 0.09rem 0 $whitespace-color, -0.09rem 0 $whitespace-color, 0.12rem 0 $whitespace-color, -0.12rem 0 $whitespace-color, 0.15rem 0 $whitespace-color, -0.15rem 0 $whitespace-color;

  @-moz-document url-prefix() { // sass-lint:disable-line empty-args
    background-position: 0 90%, 100% 90%, 0 90%;
  }
}