* {
    --first-color: #171717;
    --second-color: #ffffff;
    --third-color: #DCDCDC;
    --fourth-color: #8ebe3c;
    --first-color-opac: #17171782;

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