My go to set of sytles

brie.css

body {
    padding: 0;
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans",
    "Droid Sans", "Helvetica Neue", sans-serif;
}

.container {
    width: 66.66%;
    margin: auto;
}

.width-50 {
    width: 50%;
    display: inline-block;
}