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


div.background{
    width: 100%;
    display: block;
    position: relative;
    clear: both;
}

div.container{
    max-width: 1280px;
    width: 100%;
    position: relative;
    margin-left: auto;
    margin-right: auto;
    display: flex;
}

div.child{
    display: flex;
    flex-direction: column;
}

div.c10{
    width: 10%;
}
div.c20{
    width: 20%;
}
div.c25{
    width: 25%;
}
div.c30{
    width: 30%;
}
div.c33{
    width: 33.33%;
}
div.c40{
    width: 40%;
}
div.c50{
    width: 50%;
}
div.c60{
    width: 60%;
}
div.c70{
    width: 70%;
}
div.c80{
    width: 80%;
}
div.c90{
    width: 90%;
}div.c100{
    width: 100%;
}