* {
    box-sizing: border-box;
}

body {
    margin: 10px;
}

ul {
    text-align: center;
    display: flex;
    padding: 0;
    justify-content: space-between;
    flex-wrap: wrap;
    list-style: none;
}

ul li {
    background-color: silver;
    flex-basis: 25%;
}

#absolute {
    position: relative;
}

#absolute div {
    background-color: red;
}


#absolute div:nth-child(2) {
    background-color: black;
    color: #fff;
    position: absolute;
    /*left: 0;*/
    right: 0;
    top: -5px;
    bottom: -10px;
}

#absolute div:nth-child(3) {
    background-color: yellow;
    position: absolute;
    z-index: 3;
    left: 20px;
    right: 20px;
}

#degrade {
    height: 300px;
    background: linear-gradient(135deg, blue, purple, red);
}