Glassmorphism-navbar/style.css
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #288368;
}

ul {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.25);
}

ul li {
    list-style: none;
}

ul li a {
    position: relative;
    color: #fff;
    text-decoration: none;
    display: inline-block;
    padding: 20px 30px;
    z-index: 1000;
    backdrop-filter: blur(15px);
}

ul li a ion-icon {
    font-size: 2.5em;
    pointer-events: none;
    opacity: 0.25;
    transition: 0.25s;
}

ul li:active a ion-icon {
    opacity: 1;   
}

#check {
    position: absolute;
    top: 0;
    transition: 0.5s;
    z-index: 1;
    cursor: pointer;
}

#check::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 40px;
    border-radius: 8px;
    background-color: #7dc2ad;
    box-shadow: 0 0 15px #7dc2ad, 0 0 30px #7dc2ad, 0 0 45px #7dc2ad;
}