header {
    z-index: 99999;
    position: relative;
}

header #logo {
    position: fixed;
    top: 30px;
    left: 0;
    right: 0;
    width: 250px;
    height: auto;
    margin: 0 auto;
    opacity: 1;
    transition: 0.3s all cubic-bezier(0.075, 0.82, 0.165, 1) 0.6s;
}

header nav {
    display: flex;
    height: 100px;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
    position: fixed;
    left: 0;
    right: 0;
    width: 600px;
    margin: 0 auto;
    top: 100px;
    background-color: rgba(255, 255, 255, .05);
    border-radius: 200px;
    z-index: 9;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, .06);
    transition: 1s all cubic-bezier(0.075, 0.82, 0.165, 1) 0.2s;
}

header nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    display: block;
    padding: 10px 20px;
    line-height: 1;
    font-size: 15px;
    letter-spacing: 2px;
  
    transition: 0.3s all cubic-bezier(0.075, 0.82, 0.165, 1) 0.6s;
}

header nav button {
    -webkit-appearance: none;
    background: rgba(0, 0, 0, .3);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, .1);
    position: absolute;
    z-index: 99;
    left: 0;
    margin: auto;
    right: 0;
    top: 0;
    bottom: 0;
    width: 60px;
    height: 60px;
    border-radius: 100%;
    outline: 0;
    border: 0;
    cursor: pointer;
    transition: 0.3s all cubic-bezier(0.075, 0.82, 0.165, 1) 0.2s;
    transform: scale(0);
}

header nav button span {
    width: 40%;
    background: #fff;
    height: 2px;
    display: block;
    margin: 5px auto;
    transform: scalex(0);
    transition: 0.6s transform cubic-bezier(0.075, 0.82, 0.165, 1) 0s, 0.3s margin ease-in 0s;
}

header nav button:hover {
    border-color: rgba(255, 255, 255, .5);
}

header nav button:hover span {
    margin: 10px auto;
}

header.sticky #logo {
    top: 0;
    transform: scale(0.8);
    opacity: 0;
    transition-delay: 0.5s;
}

header.sticky nav {
    top: 20px;
    padding: 0;
    width: 90px;
    height: 90px;
    transition-delay: 0.5s;
}

header.sticky nav button {
    transform: scale(1);
    transition-delay: 0.6s;
}

header.sticky nav button span {
    transform: scalex(1);
    transition: 0.6s transform cubic-bezier(0.075, 0.82, 0.165, 1) 0.8s, 0.3s margin ease-in 0s;
}

header.sticky nav a {
    padding: 0;
    opacity: 0;
    letter-spacing: 0px;
    transform: scale(0.3);
    transition-delay: 0.2s;
}

@media (max-width: 768px) {
    header nav {


        width: 100%;
        top: 0;
        color: orangered;
        margin-bottom: 100px;


    }

    header #logo {
        display: none;
    }

    header nav a {
        color: orangered;
    }


}