cheatsheet.css

* {
    box-sizing: border-box;
}

body {
    font-family: 'Ubuntu', sans-serif;
    padding: 0px;
    margin: 0px;
    background-image: url(https://source.unsplash.com/1600x900/?nature,water);
}

.navbar {
    overflow: hidden;
    background-color: #333;
    position: sticky;
    top: 0;
    font-size: 25px;
}

.navbar a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none
}

.navbar a:hover {
    background-color: #ddd;
    color: #333;
}

.navbar a:active {
    background-color: green;
    color: #333;
}

.navbar a img {
    width: 30px;
    height: 30px;
    padding-bottom: 0px;
}

.leftcolumn {
    width: 75%;
    float: left;
    /* border: 2px solid red; */
}

.rightcolumn {
    width: 25%;
    float: left;
}

table {
    width: 100%;
    margin-top: 150px;
}

.container {
    height: auto;
}

.table th img {
    width: 50%;
}