veax

function heightDetect() {
	$(".main_head").css("height", $(window).height());
};
heightDetect();
$(window).resize(function() {
	heightDetect();
});

veax

HTML:
<div class="wrapper">
    <div class="tabs">
        <span class="tab">Вкладка 1</span>
        <span class="tab">Вкладка 2</span>
        <span class="tab">Вкладка 3</span>        
    </div>
    <div class="tab_content">
        <div class="tab_item">Содержимое 1</div>
        <div class="tab_item">Содержимое 2</div>

veax

/*==========  Desktop First Method  ==========*/

/* Large Devices, Wide Screens */
@media only screen and (max-width : 1200px) {

}

/* Medium Devices, Desktops */
@media only screen and (max-width : 992px) {

veax

var gulp = require('gulp'),
    sass = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss = require('gulp-minify-css'),
    jshint = require('gulp-jshint'),
    uglify = require('gulp-uglify'),
    rename = require('gulp-rename'),
    clean = require('gulp-clean'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),