* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

body {
    border: 1px solid yellow !important;
    border-bottom: none !important;
}
.r {
    color: tomato !important;
}