<div class="warpper">
        <div class="nav2k">
            <a href="../index.html" class="icon-home"><i class="fas fa-home" aria-hidden="true"></i></a>
            <a href="../index.html" class="icon-user"><i class="fas fa-user-gear" aria-hidden="true"></i></a>
            
            <div class="circle">
                <i class="fas fa-plus plus-icon" aria-hidden="true"></i>
                <a href="./HTML.html" class="icon">
                    <i class="fa fab fa-html5" aria-hidden="true"></i>
                </a>
                <a href="./CSS3.html" class="icon">
                    <i class="fa fab fa-css3" aria-hidden="true"></i>
                </a>
                <a href="#javascript" class="icon">
                    <i class="fa fab fa-js" aria-hidden="true"></i>
                </a>
                <a href="#php" class="icon">
                    <i class="fa fab fa-php" aria-hidden="true"></i>
                </a>
                
            </div>
            <div class="circlebackground"></div>
        </div>
    </div>
                            
                        
                                                
    body{
        display: block;
        position: relative;
        --bs-body-bg: #121230;
        background:var(--bs-body-bg);
        font-family:'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
        }
    
       /* start nav-bar */
    .warpper{
        height: auto;
        display: flex;
        justify-content: center;
        align-items: center;
        position : fixed;
        bottom: 10px;
        left : 50%;
        transform : translate( -50%, -10px);
    }
    .nav2k{
        position: relative;
        height: 80px;
        min-width: 300px;
        padding-left: 35px;
        padding-right: 35px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-radius: 25px;
        background-color: white;    
        box-shadow: 0 10px 20px rgba(82, 74 , 74, 0.3);
    }
    .nav2k::after{
        content: "";
        position: absolute;
        bottom: 7px;
        height: 4px;
        width: 35%;
        left: 50%;
        transform: translateX(-50%);
        background-color: gray;
        opacity: 0.3;
    }
    .circle{
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        bottom: calc(85px - 80px/2);
        margin-bottom: 0;
        height: 70px;
        width: 70px;
        border-radius: 40px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        overflow: hidden;
        background-color: #121230;
        z-index: 9;
        transition: height 0.5s;
    }
    .circle:hover{
        height: 280px;
        border-radius: 50px;
    }
    .circle .plus-icon{
        color: white;
        font-size: 27px;
        transition: opacity 0.3s ,transform 0.2s;
    }
    .circle:hover .plus-icon{
        transform: rotate(360deg);
        opacity: 0;
    }
    .circle .icon{
        position: absolute;
        top: 195px;
        color: white;
        background-color: rgb(212 249 255 / 47%);
        height: 60px;
        width: 60px;
        margin-bottom: 5px;
        border-radius: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 30px;
        cursor: pointer;
    }
    .circle .icon:nth-child(2){
        opacity: 0;
        transition: opacity 0.3s, top 0.5s ease;
    }
    .circle .icon:nth-child(3){
        opacity: 0;
        transition: opacity 0.3s, top 0.5s  0.1s ease;
    }
    .circle .icon:nth-child(4){
        opacity: 0;
        transition: opacity 0.3s, top 0.5s  0.22s ease;
    }
    .circle .icon:nth-child(5){
        opacity: 0;
        transition: opacity 0.3s, top 0.5s  0.3s ease;
        margin-bottom: 0px;
    }
    .circle:hover .icon:nth-child(2){
        opacity: 1;
        top: 5px;
    }
    .circle:hover .icon:nth-child(3){
        opacity: 1;
        top: calc(5px + 60px + 5px);
    }
    .circle:hover .icon:nth-child(4){
        opacity: 1;
        top: calc(5px + 60px + 5px + 60px + 5px);
    }
    .circle:hover .icon:nth-child(5){
        opacity: 1;
        top: calc(5px + 60px + 5px + 60px + 5px + 60px + 5px);
    }
    .circlebackground{
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        bottom: calc(85px - (80px + 15px) / 2);
        margin-bottom: 0;
        height: calc(65px + 20px);
        width: calc(65px + 20px);
        border-radius: 50%;
        background-color: #13225b;
    }
    .icon-home,.icon-user{
        cursor: pointer;
        font-size: 29px;
    }
    a{
        text-decoration: none;
    }
    .icon-home:hover,.icon-user:hover{
        color: #044c86;
        transition: all 0.5s ease;
    }
    .circle a:nth-child(2):hover{
        color: #1e87f0;
        transition: all 0.5s ease;
    }
    .circle a:nth-child(3):hover{
        color: #df3c0b;
        transition: all 0.5s ease;
    }
    .circle a:nth-child(4):hover{
        color: #dfd110;
        transition: all 0.5s ease;
    }
    .circle a:nth-child(5):hover{
        color: #0d31d1;
        transition: all 0.5s ease;
    }