* {
    box-sizing: border-box;
}

.column {
    float: left;
    width: 33.33%;
    padding: 15px;
    height: 220px;
    overflow: scroll;
    color: chartreuse;
    border: 5px inset yellowgreen;
}

th, td {
    color: yellowgreen;
}

table {
    color: yellowgreen;
}



ul {
    color: yellowgreen;
}

p {
    color: yellowgreen;
}

h2, h1, h3 {
    color: #84c754;
}

article {
    float: left;
    padding: 20%;
    width: 70%;
    height: 300px;
}

section::after {
    content: "";
    display: table;
    clear: both;
}




.row::after {
    content: "";
    display: table;
    clear: both;
     border: 5px inset yellowgreen;

}

body {
    background-color: black;
}

@media screen and (max-width: 600px) {
    .column {
        width: 100%;
    }
    
}