Роман Старинский

<div class="container">
  <div class="container-block panel -gray">
    <div class="panel-element -light-gray"></div>
    <div class="panel-element -light-gray"></div>
    <div class="panel-element -light-gray"></div>
    <div class="panel-element -light-gray"></div>
  </div>
  <div class="container-block promo -gray"></div>
  <div class="container-block content">
    <div class="aside">
      <div class="menu">
        <div class="menu-item -gray"></div>
        <div class="menu-item -gray"></div>
        <div class="menu-item -gray"></div>        
      </div>
      <div class="banner -gray"></div>
    </div>
    <div class="main -gray"></div>
  </div>
  <div class="container-block panel -gray"></div>
</div>

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.-gray {
  background-color: #333;
}

.-light-gray {
  background-color: #d6d6d6;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
  min-height: 100vh;
}

.container-block + .container-block {
  margin-top: 30px;
}

.panel {
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  padding: 10px;
  height: 50px;
}

.panel::after {
  content: '';
  flex: 1;
}

.panel-element {
  width: 75px;
  height: 30px;
}

.panel-element + .panel-element {
  margin-left: 10px;
}

.panel-element:last-child {
  order: 1;
}

.promo {
  height: 120px;
}

.content {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  padding-left: 30px;
  padding-right: 30px;
}

.aside {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 200px;
  margin-right: 30px;
}

.main {
  flex: 1;
}

.menu-item {
  height: 40px;
}

.menu-item + .menu-item {
  margin-top: 15px;
}

.banner {
  margin-top: 30px;
  height: 150px;
}