Сетки/ Испытание: строим сетку [27/32] 100%, без распорок

html,
body {
margin: 0;
padding: 0;
}

body {
width: 450px;
height: 335px;

font-size: 10px;
font-family: “Arial”, sans-serif;
color: white;
}

.header {
background-color: #34495e;
padding-top: 10px;
}

.layout-positioner {
width: 450px;
height: 160px;
margin: auto auto;
}

.layout-column-1 {
background-color: #c0392b;
width: 345px;
height: 30px;
margin-left: 50px;
padding-top: 5px;
padding-left: 5px;
}

.layout-column-2 {
background-color: #3498db;
height: 30px;
margin-top: 10px;
width:395px;
margin-bottom: 5px;
padding-left: 55px;
padding-top: 5px;
}

.layout-column-3{
background:#c0392b;
margin-top: 5px;
float: left;
width: 165px;
margin-left: 50px;
padding-left: 5px;
padding-top: 5px;
height: 55px;
}

.layout-column-4{
background:#c0392b;
float: left;
margin-top: 5px;
width: 165px;
margin-left: 10px;
padding-left: 5px;
height: 55px;
padding-top: 5px;
}

.features {
background: white;
width: 450px;
height:130px;
}

.layout-column-5{
background:#3498db;
float: left;
margin-left: 50px;
margin-top: 10px;
width: 65px;
height: 105px;
padding-top: 5px;
padding-left: 5px;
}

.layout-column-6{
background:#3498db;
float: left;
margin-top: 10px;
margin-left: 10px;
margin-right: 5px;
width: 185px;
height: 105px;
padding-top: 5px;
padding-left: 5px;
}

.layout-column-7{
background:#3498db;
float: left;
margin-top: 10px;
margin-left: 5px;
width: 65px;
height: 105px;
padding-top: 5px;
padding-left: 5px;
}

.footer {
background:#34495e;
height: 30px;
width: 400px;
padding-left: 55px;
padding-top: 5px;
}