/********** Menu Show (Show menu that was previously hidden) **********/

.osui-menu.osui-menu-show {
    pointer-events: auto;
    opacity: 1.0;
    transform: translate(0, 0) scale(1.0, 1.0);
}

.osui-menu.osui-menu-show.osui-menu-under {
    left: 50%;
    top: 100%;
    transform: translate(-50%, 0) scale(1.0, 1.0);
}

/********** Menu **********/

/* Normal Menu Styling */
.osui-menu {
    position: absolute;
    display: block;
    align-items: center;
    justify-content: center;

    color: rgba(var(--text), 1.0);
    background-color: rgba(var(--background-light), 1);
    box-shadow:
        inset 0px 1px 2px 0px rgba(var(--midlight), 1.0),
             -2px 2px 2px 0px rgba(var(--shadow), 0.5),
              2px 0px 2px 0px rgba(var(--shadow), 0.5);
    /* border: 1px solid rgba(var(--shadow), 1.0); */
    border: 2px solid rgba(var(--icon), 1.0);
    border-radius: var(--radius-large);
    /* outline: 1px solid rgba(var(--background-light), calc(var(--panel-transparency) * 0.5)); */
    outline: none;

    min-width: 1.0em;
    z-index: 1000; /* Menu */
    opacity: 0;
    padding: var(--pad-x-small);
    margin: 0;
    pointer-events: none;

    transform: translate(0, 0) scale(1.0, 0.0);

    /* To enable menu transitions use menu timing variable */
    transition: all 0s; /* var(--menu-timing) */
}

.osui-border-icon {
    border: 2px solid rgba(var(--complement), 1.0);
}

.osui-menu-under {
    transition: opacity 0.2s ease-in-out;
}

.osui-menu:not(.osui-menu-show).osui-slide-down {
    transform: translate(0, -50%) scale(1.0, 0.0);
}

.osui-menu:not(.osui-menu-show).osui-slide-up {
    transform: translate(0, 50%) scale(1.0, 0.0);
}

/* Dropdown Menu Styling */
.osui-select-menu, .osui-popup-menu {
    box-shadow: none;
    color: rgba(var(--highlight), 1);
    background: rgba(var(--darklight), 1);
    border: 1px solid rgb(var(--icon));
    border-radius: 0px;
    outline: 2px solid rgb(var(--darklight));
    z-index: 1000; /* Select Menu */
}

/* Menu Item */
.osui-menu-item {
    position: relative;
    display: block;

    color: rgba(var(--text), 1);
    cursor: pointer;

    border: 1px solid transparent;
    border-radius: calc(var(--radius-small) * 0.75);

    margin: var(--pad-x-small);
    white-space: nowrap;
}

/* Hover Item */
.osui-menu:not(.osui-invisible-menu) .osui-menu-item:not(.osui-disabled):hover {
    color: rgba(var(--highlight), 1);
    background-color: rgba(var(--icon-light), 0.1);
    border: 1px solid rgba(var(--icon-light), 0.3);
    border-radius: calc(var(--radius-small) * 0.75);
}

/* Image */
.osui-menu-icon {
    --menu-icon-size:   1.45em;

    position: relative;
    flex: 0 0 auto;
    height: var(--menu-icon-size);
    width: var(--menu-icon-size);
    filter: var(--drop-shadow);
    overflow: hidden;
}

/* Text */
.osui-menu-text {
    user-select: none;
    margin-left: 7px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Shortcut Key */
.osui-menu-shortcut {
    /*
    System Font Info:
    https://stackoverflow.com/questions/32660748/how-to-use-apples-new-san-francisco-font-on-a-webpage
    https://furbo.org/2018/03/28/system-fonts-in-css/
    https://css-tricks.com/snippets/css/system-font-stack/
    */
    display: flex;
    filter: contrast(75%) grayscale(100%);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    opacity: 0.5;
    padding-left: 2.0em;
}

.osui-menu-shortcut-character {
    /* background-color: blueviolet; */
    /* border: solid 1px; */
    text-align: center;
    margin: auto;
}

/* Separator */
.osui-menu-separator {
    pointer-events: none;
    border-top: 1px solid rgba(var(--midlight), 0.5);
    border-radius: 1px;
    height: 1px;
    margin: var(--pad-medium) var(--pad-large);
}

/* Little Arrow */
.osui-menu:not(.osui-invisible-menu) .osui-sub-menu-item::after {
    content: '';
    position: absolute;
    right: 0.50em;
    top: 50%;
    transform: translateY(-50%);
    border: var(--arrow-size) solid transparent;
    border-left-color: rgba(var(--text), 1.0);
}

.osui-menu:not(.osui-invisible-menu) .osui-sub-menu-item:hover::after {
    border-left-color: rgba(var(--highlight), 1.0);
}

/* Sub Menu */
.osui-menu-item .osui-menu {
    top:  0px;
    left: 101%;
}

/* Sub Menu Mouse Triangle */
.osui-menu-mouse-triangle {
    position: absolute;
}

/***** Invisible Hover Menu *****/

.osui-invisible-menu, .osui-invisible-menu-item {
    color: transparent;
    background-color: transparent;
    box-shadow: none;
    border: none;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    padding: 0;
}

.osui-invisible-menu-item {
    margin: 0;
}

/************ Toolbar Button **********/

.osui-toolbar-button {
    display: flex;
    cursor: pointer;
    background-color: transparent;
    border: none;
    border-radius: var(--radius-large);
    outline: none; /* for macos */
    position: relative;
    height: var(--button-size);
    width: var(--button-size);
    min-height: var(--button-size);
    min-width: var(--button-size);
    margin-left: var(--pad-x-small);
    margin-right: var(--pad-x-small);
    opacity: 1.0;
    overflow: hidden;
}

/* Background */
.osui-button-background {
    pointer-events: none;
    position: absolute;
    left: 0; right: 0; top: 0; bottom: 0;
    margin: 0;
    background-color: rgb(var(--darkness));
    background-image: linear-gradient(to bottom, rgba(var(--icon-light), 0.6), rgba(var(--icon), 0.6));
    border-radius: var(--radius-large);
    border: none;
    outline: none; /* for macos */
    box-shadow: /* pop-out-shadow */
        inset var(--minus) var(--pixel) var(--pixel) rgba(var(--white), 0.25),
        inset var(--pixel) var(--minus) var(--pixel) rgba(var(--black), 0.25);
    z-index: -1;
}

/* Hover */
.osui-toolbar-button:not(.osui-selected):enabled:hover .osui-button-background {
    filter: brightness(125%);
    box-shadow: /* pop-out-shadow */
        inset var(--pixel) 0 var(--pixel) 0 rgba(var(--black), 0.25),
        inset var(--minus) 0 var(--pixel) 0 rgba(var(--black), 0.25),
        inset var(--minus) var(--pixel) var(--pixel) var(--pixel) rgba(var(--white), 0.15),
        inset var(--pixel) var(--minus) var(--pixel) var(--pixel) rgba(var(--black), 0.15);
}

/* Active / Selected */
.osui-toolbar-button:not(.osui-selected):enabled:active,
.osui-toolbar-button.osui-selected:enabled {
    box-shadow: inset var(--minus) var(--pixel) var(--pad-small) rgba(0, 0, 0, 0.5); /* sunk-in-shadow */
}
.osui-toolbar-button:not(.osui-selected):enabled:active .osui-button-background,
.osui-toolbar-button.osui-selected:enabled .osui-button-background {
    filter: brightness(50%) grayscale(20%);
}

/* Hover Active */
.osui-hover-active:hover, .osui-hover-active:active {
    box-shadow: inset var(--minus) var(--pixel) var(--pad-small) rgba(0, 0, 0, 0.5) !important; /* sunk-in-shadow */
}
.osui-hover-active:hover .osui-button-background,
.osui-hover-active:active .osui-button-background {
    filter: brightness(50%) grayscale(20%) !important;
}

/* Gray Background */
.osui-gray-button:enabled .osui-button-background {
    filter: grayscale(90%);
}
.osui-gray-button:not(.osui-selected):enabled:hover .osui-button-background {
    filter: brightness(125%) grayscale(90%);
}
.osui-gray-button:not(.osui-selected):enabled:active .osui-button-background,
.osui-gray-button.osui-selected:enabled .osui-button-background {
    filter: brightness(50%) grayscale(90%);
}

/* Complement Background */
.osui-complement-button:enabled .osui-button-background {
    background-color: rgb(var(--darkness));
    background-image: linear-gradient(to bottom, rgba(var(--complement), 0.9), rgba(var(--complement), 0.65));
}

/* Disabled Button */
.osui-toolbar-button:disabled {
    background-color: rgba(var(--button-dark), var(--panel-transparency));
    background-image: linear-gradient(to right, rgba(var(--complement), 0.05), rgba(var(--complement), 0.05));
    box-shadow: none;
}
.osui-toolbar-button:disabled {
    filter: none;
}
.osui-toolbar-button:disabled > * {
    filter: contrast(75%) grayscale(100%) brightness(50%);
}

/* Left / Middle / Right */
.osui-button-left, .osui-button-left .osui-button-background {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    margin-right: 0;
}
.osui-button-middle, .osui-button-middle .osui-button-background {
    border-radius: 0;
    margin-right: 0;
    margin-left: 0;
}
.osui-button-right, .osui-button-right .osui-button-background {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    margin-left: 0;
}

.osui-button-left .osui-button-background {
    box-shadow: /* pop-out-shadow */
        inset            0 var(--pixel) rgba(var(--white), 0.25),
        inset var(--pixel) var(--minus) var(--pixel) rgba(var(--black), 0.25);
}
.osui-button-middle .osui-button-background {
    box-shadow: /* pop-out-shadow */
        inset            0 var(--pixel) rgba(var(--white), 0.25),
        inset            0 var(--minus) rgba(var(--black), 0.25);
}
.osui-button-right .osui-button-background {
    box-shadow: /* pop-out-shadow */
        inset var(--minus) var(--pixel) var(--pixel) rgba(var(--white), 0.25),
        inset            0 var(--minus) rgba(var(--black), 0.25);
}

/********** Toolbar Separator / Toolbar Spacer **********/

.osui-toolbar-separator {
    border-left: solid var(--border-micro) rgba(var(--shadow), 0.50);
    border-right: solid var(--border-micro) rgba(var(--shadow), 0.15);
    border-top: 0;
    border-bottom: 0;
    width: var(--pad-micro);
    height: calc(var(--button-size) - 1.25ch);
    margin-left: var(--pad-medium);
    margin-right: var(--pad-medium);
    margin-top: var(--pad-small);
}

.osui-toolbar-spacer {
    pointer-events: none;
    border: none;
    margin: none;
    width: 1em;
    height: var(--button-size);
}