header {
    background: var(--background);
}

header .header-container {
    padding: 10px 20px;
}

header .mainBar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 99;
}

/* 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(--title-color);
    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(--title-color);
    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;
}

/* Blur background */
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: 10;
}

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

/* Navigation menu */
#navMenu {
    position: absolute;
    top: 0;
    left: 0;
    transition: all ease-in-out 0.3s;
    max-height: 0;
    overflow: hidden;
    background-color: var(--background);
    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);
}

#navMenu.isOpened {
    max-height: 100vh;
    padding: 80px 20px 30px 20px;
    opacity: 1;
    transform: translateY(0);
    z-index: 50;
    box-shadow: var(--shadow);
}

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

#navMenu .navSite a {
    opacity: 0;
    color: black;
    font-weight: 600;
    display: flex;
    gap: 5px;
}

#navMenu .navSite a:hover {
    color: var(--green-dark);
}

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

#navMenu .navSite a i {
    color: var(--green-dark);
}


    /* Pad Version */
    @media screen and (min-width: 768px) {
        header .header-container {
            padding: 15px 40px;
        }

        #navMenu {
            padding: 75px 40px 0 40px;
        }

        #navMenu.isOpened {
            padding: 95px 40px 30px 40px;
        }
    }


        /* Desktop Version */
        @media screen and (min-width: 992px) {
            header .header-container {
                padding: 15px 60px;
                display: flex;
                justify-content: space-between;
            }

            header .mainBar {
                width: max-content;
            }

            #menuBtn {
                display: none;
            }

            #navMenu,
            #navMenu.isOpened {
                padding: 0;
                position: static;
                max-height: none;
                opacity: 1;
                z-index: initial;
                width: max-content;
                display: flex;
                align-items: center;
                box-shadow: none;
            }

            #navMenu .navSite {
                flex-direction: row;
                gap: 40px;
            }

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

            header #blurBcg {
                display: none;
            }
        }