Замечания по 20/28 100%


#1
html, 
body {
margin: 0;
padding: 0;
}

body {
width: 430px;
min-height: 280px;
padding: 10px;
font-family: "Arial", sans-serif;
font-size: 14px;
line-height: 1.4;
background: #ecf0f1;
}
.main-menu {
margin: 0;
padding: 0;
list-style: none;
background:#2980b9;
}
.main-menu li {
display:inline-block;
margin-right:-5px;

}
.main-menu a {
color: #ffffff;
display:block;
padding: 10px 15px;
border-left: 2px solid #2c3e50;
text-decoration:none;

}
.main-menu .active {
background-color:#1abc9c;}