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@mixin placeholder() {
	&::-webkit-input-placeholder {
	   @content;
	}

	&:-moz-placeholder { /* Firefox 18- */
	   @content; 
	}

	&::-moz-placeholder {  /* Firefox 19+ */
	   @content;  
	}

	&:-ms-input-placeholder {  
	   @content;
	}
}