body{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #ccc;
}
.container{
position: relative;
width: 80%;
margin: 0 auto;
background: #fff;
padding: 20px;
box-sizing: border-box;
min-height: 400px;
}
.full-widh{
    width: 100%;
}
nav{
    width: 100%;
}
nav ul{
    margin: 20px 0 0;
    padding: 0;
    border-radius: 4px;
    background: #262626;
    overflow: hidden;
}
nav ul li{
    list-style: none;
    display: inline-block;
}
nav ul li a{
    display: block;
    padding: 15px 20px;
    color: #fff;
    text-decoration: none;
}
.active,
nav ul li a:hover
{
background: #f00;
}
.col-7{
    width: 70%;
    min-height: 400px;
    background: #ccc;
    float: left;
}
.col-3{
    width: 28%;
    min-height: 400px;
    background: #ccc;
    float: right;
    box-sizing: border-box;
    padding: 20px;
}
.margin-top20px{
    margin-top: 20px;
}
.post{
    background: #ccc;
    padding: 20px;
    background: #f1f1f1;
}
img{
    max-width: 100%;
}
h1{
    margin: 10px 0;
}
.col-3 ul{
    margin: 0;
    padding: 0;
}
.col-3 ul li{
    list-style: none;
    padding: 8px;
    border-bottom: 1px solid rgba(0,0,0,.1);
}
.col-3 ul li:hover{
    background: #f00;
    color: #fff;
}
.footer-text{
    padding-top: 20px;
    text-align: center;
    font-weight: bold;
}
@media (max-width: 900px){
    .container{
        width: 100%;
    }
    nav ul li{
        display: block;
        text-align: center;
    }
    .col-7,
    .col-3{
        width: 100%;
        float: none;
    }
    .col-3{
        margin-top:20px;
    }
}