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

body {
    background-color: #345;
    color: #EEE;
    font-family: verdana;
    min-height: 100vh;
    border: 4px solid orange;
}

#promotion_items, #section2 {
    border: 8px solid lime;
    min-height: 30svh;
    margin: 16px;
    position: relative;
}

.sale_item {
    width: 180px; height: 180px;
    margin: 10px;
    display: inline-block;
}

.mens {
    background-color: blue;
    transform: skewX(20deg) rotate(30deg);
    filter: grayscale(60%);
}

.womens {
    background-color: hotpink;
    position: absolute;
    top: 10px; right: 10px;
    width: 100px; height: 100px;
}

.kids {
    background-color: orangered;
}

.new {
    background-color: purple;
}

.clearance {
    background-color: red;
}


h1 {
    background-image: repeating-linear-gradient(-45deg, grey 0px, grey 20px, #234 20px, #234 40px, lime 40px, lime 45px);
    text-align: center;
    text-shadow: 0px 0px 4px #222;
    padding: 50px 10px;
}

#section2 {
    display: flex; /* making a flexbox parent */
    flex-flow: row wrap;
}

#section2 div {
    width: 250px; height: 250px;
    margin: 10px;
    background-color: yellow;
    /*float: left;  kinda works, but not common*/
    flex-grow: 1;
    flex-basis: 300px;
}

#section3 {
    border: 8px solid yellow;
    min-height: 500px;
    margin: 50px auto;
    width: 80%;
    position: relative;
}

#redbox {
    width: 150px; height: 150px;
    background-color: rgba(220, 0, 0, .5);
    border: 2px solid white;
    position: absolute;
    bottom: 100px; right: 100px;
    border-radius: 50%;
    z-index: 2;
}

#orangebox {
    width: 200px; height: 200px;
    background-color: orangered;
    border: 2px solid white;
    position: absolute;
    bottom: -20px; right: -20px;
    border-radius: 50%;
    background-image: url(../images/butterfly.jpg);
    background-size: cover;
    background-position: center;
}