JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="ru">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <title>Архитектурные решения</title>
    <link href='http://fonts.googleapis.com/css?family=Open+Sans+Condensed:700' rel='stylesheet' type='text/css'>
    
    <link rel="stylesheet" href="css/main.css">
  </head>
  <body>
  <div class="container-fluid">
  <div class="row">
      <div class="col-md-3">
                 <div class="sidebar">
                    <div class="first">
                       <div class="logo-section">
                        <img src="img/logo.png" alt="" class="logo">
                        <ul class="social-icons">
                            <li><a href="https://twitter.com/Archidomby"><img src="img/twitter-icon.png"></a></li>
                            <li><a href="https://vk.com/club71031451"><img src="img/vk-icon.png"></a></li>
                            <li><a href="mailto:[email protected]"><img src="img/email-icon.png"></a></li>
                        </ul>
                        </div>
                    </div>
                    <div class="second">
                        <div class="main-nav" role="navigation">
                            <ul>
                                <li><a href="">Главная</a></li>
                                <li><a href="">Услуги и цены</a></li>
                                <li><a href="">Наши проекты</a></li>
                                <li><a href="">Статьи</a></li>
                                <li><a href="">Партнеры</a></li>
                                <li><a href="">Контакт</a></li>
                            </ul>
                        </div>
                    </div>
                </div>
       </div>
           <div class="col-md-9">
           <div class="row">
            <div class="main-content">
   ...

CSS

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

/*END RESET*/

html, body {
    background-color: #fafaf9;
    height: 100%;
    color: #111;
}

/*SIDEBAR SECTION*/

.col-md-3 {
    height: 100%;
    background-color: #ef4f47;
    padding: 0;
    min-width: 270px;
 }
.first {
    background-color: #75d9c6;
    height: auto;
}
.second {
    height: auto;
}
.first, .second {
    text-align: center;
    padding: 2.5em;
}
.logo {
    display: block;
    margin: 0 auto;
}
.social-icons li {
    display: table-cell;
    width: 52px;
    height: 52px;
    vertical-align: middle;
    padding: 0 0.3em;
}

.social-icons li:hover {
background-color: #9ee4d7;
}
.social-icons {
    margin-top: 1.25em;
    display: inline-block;
    float: none;
}
.main-nav {
    font-family: 'Open Sans Condensed', sans-serif;
    font-size: 1.7em;
    text-transform: uppercase;
    line-height: 1.25em;
    display: inline-block;
    text-align: left;
    min-width:...