header {
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    background: transparent;
    backdrop-filter: blur(50px);
    width: 100%;
}

header .header-container {
    padding: 0 20px;
}

header .header-content {
    padding: 10px 0;
}

header .mainBar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Button display nav menu mobile */
#menuBtn {
    position: relative;
    width: 30px;
    height: 30px;
    transition: transform 0.3s;
    padding: 0;
    border: none;
    cursor: pointer;
}

#menuBtn span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--grey);
    transition: background 0.3s;
    border-radius: 50px;
}

#menuBtn span::before,
#menuBtn span::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    transform: translateY(-6px);
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--grey);
    transition: transform 0.3s;
    border-radius: 50px;
}

#menuBtn span::after {
    transform: translateY(6px);
    top: 2px;
}

#menuBtn.isOpened span {
    background: transparent;
}

#menuBtn.isOpened span::before {
    transform: translateY(0) rotate(45deg);
    top: 0;
}

#menuBtn.isOpened span::after {
    transform: translateY(0) rotate(-45deg);
    top: 0;
}

/* Navigation menu */
#navMenu {
    position: absolute;
    top: 0;
    left: 0;
    transition: all ease-in-out 0.3s;
    max-height: 0;
    overflow: hidden;
    background-color: var(--primary-color);
    width: 100%;
    padding: 70px 20px 0 20px;
    z-index: -1;
    opacity: 0;
    border-bottom-left-radius: var(--hight-radius);
    border-bottom-right-radius: var(--hight-radius);
    display: flex;
    flex-direction: column;
    gap: 30px;
}

#navMenu.isOpened {
    max-height: 100vh;
    padding: 80px 20px 30px 20px;
    opacity: 1;
    transform: translateY(0);
}

#navMenu .navSite {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

#navMenu .navSite a {
    opacity: 0;
    color: var(--opposite-color);
}

#navMenu .navSite a:hover,
#navMenu #contactBtn:hover {
    color: var(--blue);
}

#navMenu.isOpened .navSite a {
    opacity: 1;
}

header #blurBcg {
    transition: all 0.3s ease;
}

header #blurBcg.isOpened {
    backdrop-filter: blur(8px);
    height: 100vh;
    width: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: -2;
}

header #blurBcg.isOpened {
    background-color: rgba(221, 221, 221, 0.3);
}


/* Pad Version */
@media screen and (min-width: 768px) {
    header .header-container {
        padding: 0 40px;
    }

    header .header-content {
        padding: 15px 0;
    }

    #navMenu {
        padding: 75px 40px 0 40px;
        flex-direction: row;
        justify-content: center;
        gap: 60px;
    }

    #navMenu.isOpened {
        padding: 85px 40px 20px 40px;
    }

    #navMenu .navSite {
        flex-direction: row;
        align-items: center;
        gap: 60px;
    }
}


/* Desktop Version */
@media screen and (min-width: 992px) {
    header .header-container {
        padding: 0 60px;
    }

    header .header-content {
        display: flex;
        padding: 20px 0;
        position: relative;
    }

    header .mainBar {
        width: max-content;
    }

    #navMenu {
        padding: 85px 40px 0 40px;
        flex-direction: row;
        justify-content: flex-end;
    }

    #navMenu,
    #navMenu.isOpened {
        position: static;
        opacity: 1;
        padding: 0;
        max-height: none;
        border-radius: unset;
        z-index: unset;
        align-items: center;
        box-shadow: unset;
        transform: none;
        background-color: transparent;
    }

    #navMenu .navSite {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50% ,-50%);
        height: 50px;
        padding: 0 60px;
        border-radius: var(--medium-radius);
        box-shadow: var(--shadow);
        border: var(--border);
        background: var(--primary-color);
    }

    #navMenu .navSite a {
        opacity: 1;
    }

    header #blurBcg,
    #menuBtn {
        display: none;
    }
}