wallabag/app/Resources/static/themes/material/css/icons.scss

/* ==========================================================================
 * Icons
 * ========================================================================== */

/**
 *
 * Material icons
 *
 */
.material-icons {
  font-family: "Material Icons";
  font-weight: normal;
  font-style: normal;
  font-size: 24px; /* Preferred icon size */
  width: 1em;
  height: 1em;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;

  /* Support for all WebKit browsers. */
  -webkit-font-smoothing: antialiased;

  /* Support for Safari and Chrome. */
  text-rendering: optimizeLegibility;

  /* Support for Firefox. */
  -moz-osx-font-smoothing: grayscale;

  /* Support for IE. */
  font-feature-settings: "liga";

  .md-18 {
    font-size: 18px;
  }

  .md-24 {
    font-size: 24px;
  }

  .md-36 {
    font-size: 36px;
  }

  .md-48 {
    font-size: 48px;
  }

  .md-dark {
    color: rgb(0 0 0 / 54%);

    .md-inactive {
      color: rgb(0 0 0 / 26%);
    }
  }

  .md-light {
    color: rgb(255 255 255 / 100%);

    .md-inactive {
      color: rgb(255 255 255 / 30%);
    }
  }
}

/**
 *
 * Icomoon icons
 *
 */
[class^="icon-"]::before,
[class*=" icon-"]::before {
  font-family: icomoon;
  speak: none;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  line-height: 1;
  background-size: 24px;

  /* Enable Ligatures ================ */
  letter-spacing: 0;
  font-feature-settings: "liga";
}

.icon-eye::before {
  content: "\e9ce";
}

.icon-no-eye::before {
  content: "\e9d1";
}

.icon-calendar::before {
  content: "\e953";
}

.icon-mail::before {
  content: "\ea86";
}

.icon-time::before {
  content: "\e952";
}

a.icon-image {
  background-repeat: no-repeat;
  padding-right: 0.4em !important;
  padding-left: 0 !important;
  margin-left: 25px;

  &::before {
    content: "";
    display: block;
    width: 24px;
    height: 24px;
    float: left;
    margin: 7px 1.5px 0 0;
  }

  &.diaspora::before {
    background: url("../../_global/img/icons/diaspora-icon--black.png") no-repeat center/80%;
  }

  &.unmark::before {
    background: url("../../_global/img/icons/unmark-icon--black.png") no-repeat center/80%;
  }

  &.shaarli::before {
    background: url("../../_global/img/icons/shaarli.png") no-repeat center/80%;
  }

  &.scuttle::before {
    background: url("../../_global/img/icons/scuttle.png") no-repeat center/80%;
  }
}

.icon-google-plus2::before {
  content: "\ea89";
}

.icon-facebook2::before {
  content: "\ea8d";
}

.icon-twitter::before {
  content: "\ea96";
}

.icon-apple::before {
  content: "\eabf";
}

.icon-android::before {
  content: "\eac1";
}

.icon-chrome::before {
  content: "\eae5";
}

.icon-firefox::before {
  content: "\eae6";
}

.icon-link::before {
  content: "\e9cb";
}

footer [class^="icon-"],
footer [class*=" icon-"] {
  font-size: 2em;
  transition: text-shadow 0.2s ease;
  padding-right: 10px;
}

footer [class^="icon-"]:hover,
footer [class*=" icon-"]:hover {
  text-shadow: 0 0 10px rgb(0 0 0 / 30%);
}