[data-ui="bottom-nav"] {
    position: absolute;
    left: 50%; bottom: 0; transform:  translateZ(0) translate(-50%,0);
    width: 36rem; height: auto;
    padding-bottom: 4rem;
    pointer-events: all;
    transition: transform var(--transition-duration), opacity var(--transition-duration);
} 

[data-ui="bottom-nav"]::before {
    content: '';
    position: absolute;
    left: 0%; bottom: 0;    
    width: 100%; height: 4rem;
    background-image: url(images/pattern-lines.svg);
    background-repeat: repeat;
    pointer-events: none;
}

[data-ui="bottom-nav"] > [data-ui="btns"] {
    position: relative;
    box-sizing: border-box;
    width: 100%; height: auto;
    display: flex;
    flex-direction: row;
    padding: 0.6rem;
    border: 1px solid var(--color-gold);
    backdrop-filter: blur(10px);
    background-color: rgba(0,0,0,0.2);
    margin-bottom: 2px;

}

[data-ui="bottom-nav"] [data-ui="btns"] my-btn {
    appearance: none;
    position: relative;
    width: 6.8rem; height: 6.8rem;
    /* background-color: transparent; */
    /* border: 0; */
    cursor: pointer;
}

[data-ui="bottom-nav"] [data-ui="btns"] my-btn svg { width: 100%; height: 100%; pointer-events: none; }

[data-ui="bottom-nav"] [data-ui="btns"] my-btn::before {
    content: '';
    position: absolute;
    left: 0; top: 0; width: 100%; height: 100%;
    background-color: var(--color-gold);
    transition: opacity var(--transition-duration), filter var(--transition-duration);
    opacity: 0;
    pointer-events: none;
}

[data-ui="bottom-nav"] [data-ui="btns"] my-btn:hover:before {
    opacity: 0.25;
}

[data-ui="bottom-nav"].blink [data-ui="btns"] my-btn[data-role="menu-toggle"]:before {
    animation: menu_btn_blink 3s;
}


[data-ui="bottom-nav"] [data-ui="btns"] my-btn[data-role="menu-toggle"] {
    width: 100%;
    text-align: center;
    font-family: 'Playfair Display Regular', Arial, Helvetica, sans-serif;
    font-size: 2.0rem;
    color: white;
    letter-spacing: 2%;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes menu_btn_blink {
    0% { opacity: 0; transform:  translateZ(0) scale(0.9); }
    15% { opacity: 0.25; transform:  translateZ(0) scale(1); } 
    30% { opacity: 0; transform:  translateZ(0) scale(0.9);}
    45% { opacity: 0.25; transform:  translateZ(0) scale(1); }
    60% { opacity: 0; transform:  translateZ(0) scale(0.9); }
    75% { opacity: 0.25; transform:  translateZ(0) scale(1); }
    100% { opacity: 0; transform:  translateZ(0) scale(1); }
}

[data-ui="bottom-nav"] my-btn[data-role="expand"] {
    position: absolute;
    left: 50%; top: 0; transform:  translateZ(0) translate(-50%,-50%);
    width: 3.2rem; height: 3.2rem;
    background-color: white;
    z-index: 100;
    border-radius: 3rem;
    cursor: pointer;
    transition: background-color var(--transition-duration);
}

[data-ui="bottom-nav"] my-btn[data-role="expand"] svg {
    transform:  translateZ(0) rotate(-90deg) scaleX(1);
    transition: transform var(--transition-duration);
}

[data-ui="vr-app"].bottom-nav-menu-open [data-ui="bottom-nav"] my-btn[data-role="expand"] {
    background-color: var(--color-gold);
}

[data-ui="vr-app"].bottom-nav-menu-open [data-ui="bottom-nav"] my-btn[data-role="expand"]::after { 
    opacity: 0!important;
    pointer-events: none!important;    
    transform: translateX(-50%) scale(1)!important;
}

[data-ui="vr-app"]:not(.bottom-nav-menu-open) [data-ui="bottom-nav"] my-btn[data-role="expand"]:hover::after { 
    transform: translateX(-50%) scale(1)!important;
}

[data-ui="vr-app"].bottom-nav-menu-open [data-ui="bottom-nav"] my-btn[data-role="expand"] svg {
    transform:  translateZ(0) rotate(-90deg) scaleX(-1);
}


[data-ui="bottom-nav"] my-btn[tooltip]::after { 
    content: attr(tooltip);
    position: absolute;
    left: 50%; bottom: calc(100% + 0.6rem); height: 4rem; transform:  translateZ(0) translate(-50%) scale(0.90);
    padding: 0 2rem;
    background-color: black;
    font-family: sans-serif;
    font-size: 1.4rem;
    color: white;
    white-space: nowrap;
    display: flex;
    align-items: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-duration), transform var(--transition-duration);
}


[data-ui="bottom-nav"] [data-ui="mobile-btns"] {
    position: absolute;
    left: -0.1rem; bottom: calc(100% + 1rem); width: calc(100% + 0.2rem); height: 4rem;
    /* background-color: rgba(0,0,0,0.2); */
    pointer-events: none;
    opacity: 1;
    transition: opacity var(--transition-duration);
}

main.bottom-nav-menu-open [data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn,
main.bottom-nav-menu-open [data-ui="bottom-nav"] [data-ui="mobile-btns"] {
    opacity: 0;
    pointer-events: none;
}

[data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn {
    position: absolute;
    border: 0.1rem solid var(--color-gold);
    width: 4rem; height: 4rem;
    pointer-events: all;
    cursor: pointer;
    backdrop-filter: blur(10px);
    background-color: rgba(0,0,0,0.1);
    transition: opacity var(--transition-duration);
    will-change: transform, opacity;
    backface-visibility: hidden;
}

[data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn[data-role="map"] { left: 0rem }
[data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn[data-role="info"] { left: 5rem }
[data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn[data-role="tracks-open"] { right: 0rem }
[data-ui="bottom-nav"] [data-ui="mobile-btns"] my-btn[data-role="settings-open"] { right: 5rem }


@media (pointer: fine) { 
    [data-ui="bottom-nav"].blink my-btn[tooltip]::after,
    main:not(.bottom-nav-menu-open) [data-ui="bottom-nav"] my-btn[tooltip]:hover::after { 
        opacity: 1;
         transform:  translateZ(0) translate(-50%) scale(1);
    }
}

@media screen and (max-width: 500px) {
    
    [data-ui="bottom-nav"] [data-ui="btns"] my-btn {
        appearance: none;
        position: relative;
        width: 5rem; height: 5rem;
        /* background-color: transparent; */
        /* border: 0; */
        cursor: pointer;
    }

    [data-ui="bottom-nav"] {
        width: calc(100% - 2rem); height: auto;
        padding-bottom: 1.4rem;
    }

    [data-ui="bottom-nav"]::before {
        left: 6rem; width: calc(100% - 12rem); height: 1.2rem;
    }

    main.settings-open [data-ui="bottom-nav"],
    main.tracks-open [data-ui="bottom-nav"] {
        transform:  translateZ(0) translate(-50%,10rem);
        opacity: 0;
        pointer-events: none;
    }
}