[class^="icon-"]::before,
[class*=" icon-"]::before {
  display: inline-block;
  font-style: normal;
  margin-right: 0.15em;
}

.icon-user::before { content: "👤"; }
.icon-search::before { content: "🔍"; }
.icon-sign-out::before { content: "🚪"; }
.icon-edit::before { content: "✏️"; }
.icon-bell::before { content: "🔔"; }
.icon-home::before { content: "🏠"; }
.icon-comment-o::before { content: "💬"; }
.icon-eye::before { content: "👁"; }
.icon-lock::before { content: "🔒"; }
.icon-folder-open-o::before { content: "📁"; }
.icon-barcode::before { content: "▦"; }
.icon-check::before { content: "✓"; color: #007bff; }
.icon-envelope::before { content: "✉"; }
.icon-refresh::before { content: "↻"; }
.icon-key::before { content: "🔑"; }
.icon-link::before { content: "🔗"; }
.icon-thumbs-o-up::before { content: "👍"; }
.icon-heart-o::before { content: "♡"; }