/* reset rule */
* {
    margin: 0; padding: 0; border: 0; box-sizing: border-box;
}

:root {
    font-size: 62.5%;

    /* css variables */
    --color-primary1: #ccc;
    --color-font1: #222;
    --color-accent1: orange;

    --size-sm: 4px;
    --size-medium: 8px;
    --size-medium2: 12px;
    --size-lg: 16px;
}