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;
}

#navMenu #theme-btn {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    background: transparent;
    border: var(--border);
    width: 60px;
    height: 30px;
    border-radius: 30px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: rgba(0, 0, 0, 0.08) 0px 1px 4px 1px inset, rgba(0, 0, 0, 0.2) 0px 1px 0px 0px inset;
}

.dark #navMenu #theme-btn {
    box-shadow: rgba(255, 255, 255, 0.08) 0px 1px 4px 1px inset, rgba(255, 255, 255, 0.2) 0px 1px 0px 0px inset;
}

#navMenu #toggle-theme {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    width: 22px;
    height: 22px;
    background: var(--blue);
    font-size: 16px;
    border-radius: 50%;
    color:  var(--primary-color);
    position: absolute;
    left: 0.3rem;
    transition: transform 500ms, left 500ms;
}

.dark #theme-btn #toggle-theme {
    transform: rotate(360deg);
    left: calc(100% - 27px);
}

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;
}

.dark header #blurBcg.isOpened {
    background-color: rgb(23 23 23/0.3);
}

.light 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;
            overflow: hidden;
        }
    }


        /* 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;
                background: color-mix(in srgb, var(--primary-color) 50%, rgba(255, 255, 255, 0.05));
                padding: 0 60px;
                border-radius: var(--medium-radius);
            }

            .dark #navMenu .navSite {
                box-shadow: rgba(255, 255, 255, 0.08) 0px 1px 4px 1px inset, rgba(255, 255, 255, 0.2) 0px 1px 0px 0px inset;
            }

            .light #navMenu .navSite {
                box-shadow: rgba(0, 0, 0, 0.08) 0px 1px 4px 1px inset, rgba(0, 0, 0, 0.2) 0px 1px 0px 0px inset;
            }

            #navMenu .navSite a {
                opacity: 1;
            }

            #navMenu #contactBtn {
                color: var(--primary-color);
                position: absolute;
                right: 0;
            }

            #navMenu #contactBtn:hover {
                color: var(--primary-color);
            }

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