.ft {
    width: 100%;
    background-color: black;
}

.lft,
.mft,
.rft {
    width: 33.33%;
    float: left;
    height: 150px;
    font-family: sans-serif;
    color: white;
    font-size: 12px;
    padding-left: 5%;
    border-style: double;
    border-width: 5px;
    border-color: forestgreen;
}

@media screen and (max-width: 800px) {
    .lft,
    .mft,
    .rft {
        width: 100%;
    }
}

#footer {
  clear: both;			
}