header {
    position: sticky;
    top: 0;
    z-index: 9999999;
}

#headerBar {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px 20px;
    width: 100%;
    background-color: var(--header-background-color);
    z-index: 9999999;
}

#headerBar::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--header-background-color);
    border-bottom: 2px solid var(--sec-theme-color);
    box-shadow: var(--sec-theme-color) 0 1px 10px;
    z-index: 1; 
}

#headerTitle {
    font-size: 33px;
    display: flex;
    align-items: center;
    gap: 11px;
    color: var(--main-theme-color);
    text-decoration: none;
    position: relative;
    z-index: 2;
}

#headerTitle > img {
    width: 33px;
}


#headerNavMenu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

#headerLinksDiv {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 25px;
    position: relative;
    z-index: 1;
}

.headerLink {
    font-size: 24px;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}

.headerLink:hover {
    color: var(--main-theme-color);
    transform: scale(1.05);
}

.headerLink.activeLink {
    text-decoration: underline;
}



#headerNavBtn {
    --bar-height: 4px;
    --bar-gap: 4px;

    display: none;
    flex-direction: column;
    gap: var(--bar-gap);
    width: 26px;
    background-color: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 2;
}

#headerNavBtn span {
    width: 100%;
    height: var(--bar-height);
    background-color: var(--main-text-color);
    transition: all 0.3s ease-in-out;
}

#headerNavBtn:hover span {
    background-color: var(--main-theme-color);
}

#headerNavBtn.open span:nth-child(1) {
    transform: translateY(calc(var(--bar-height) + var(--bar-gap))) rotate(45deg);
}

#headerNavBtn.open span:nth-child(2) {
    opacity: 0;
}

#headerNavBtn.open span:nth-child(3) {
    transform: translateY(calc((var(--bar-height) + var(--bar-gap)) * -1)) rotate(-45deg);
}







/* #region TABLETS */

@media (max-width: 1100px) {

    #headerNavMenu {
        position: static;
        transform: none;
    }
}

/* #endregion */






/* #region PHONES */

@media (max-width: 725px) {

    #headerTitle {
        order: 2;
    }

    #headerTitle > img {
        order: 2;
    }

    #headerNavBtn {
        display: flex;
    }

    #headerLinksDiv {
        display: flex;
        flex-direction: column;
        justify-content: start;
        align-items: start;
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 40%;
        width: fit-content;
        height: calc(100vh - 100%);
        background-color: var(--header-background-color);
        padding: 25px;
        gap: 20px;
        z-index: -1;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
    }

    #headerLinksDiv.open {
        transform: translateX(0);
        border-right: 2px solid var(--sec-theme-color);
        box-shadow: var(--sec-theme-color) 0 5px 10px;
    }


    #headerNavBtn:hover span {
        background-color: var(--main-text-color);
    }



    #headerMenuOverlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.7);
        z-index: 9999998;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease-in-out;
    }

    #headerMenuOverlay.open {
        backdrop-filter: blur(1px);
        -webkit-backdrop-filter: blur(1px);
        opacity: 1;
        pointer-events: auto;
    }
}

/* #endregion */