Tag-list-effect.css

@import url('https://fonts.googleapis.com/css?family=Poppins:400,500,600,700,800,900&displayer=swap');

#Tag-list-effect {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
    background: #333;
}

#Tag-list-effect ul {
    margin: 0;
    padding: 0 100px;
    box-sizing: border-box;
}

#Tag-list-effect ul li {
    position: relative;
    list-style: none;
    font-size: 24px;
    font-weight: 700;
    color: #777;
    text-transform: uppercase;
    padding: 10px 20px;
    margin: 5px;
    display: inline-flex;
    transition: 0.5s;
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    z-index: 1;
}

#Tag-list-effect ul li:hover {
    color: #fff;
}

#Tag-list-effect ul li:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: #000;
    z-index: -1;
    transform-origin: right;
    transform: scaleX(0);
    transition: transform 0.5s;
}

#Tag-list-effect ul li:hover:before {
    transform-origin: left;
    transform: scaleX(1);
    transition: transform 0.5s;   
}

#Tag-list-effect ul li:after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: #000;
    z-index: -1;
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.5s;
}

#Tag-list-effect ul li:hover:after {
    transform-origin: right;
    transform: scaleX(1);
    transition: transform 0.5s;   
}

#Tag-list-effect ul li:nth-child(3n+1):before,
#Tag-list-effect ul li:nth-child(3n+1):after {
    background: #ef5777;
}

#Tag-list-effect ul li:nth-child(3n+2):before,
#Tag-list-effect ul li:nth-child(3n+2):after {
    background: #a55eea;
}

#Tag-list-effect ul li:nth-child(3n+3):before,
#Tag-list-effect ul li:nth-child(3n+3):after {
    background: #09d375;
}