:root {
    --main-font-family: "Lato", sans-serif;
    --main-font-size: normal;

    --tree-font-family: var(--main-font-family);
    --tree-font-size: normal;

    --detail-font-family: var(--main-font-family);
    --detail-font-size: normal;

    --monospace-font-family: JetBrainsLight;
    --monospace-font-size: normal;

    --left-pane-item-selected-shadow-size: 2px;

    --launcher-pane-size: 58px;
    --launcher-pane-button-margin: 6px;
    --launcher-pane-button-gap: 3px;

    --tab-bar-height: 50px;
    --tab-height: 36px;
    --tab-first-item-horiz-offset: 0;
}

/*
 * THEME COLORS
 */

/* 
 * Light theme scheme
 */
:root {
   --theme-style: light;

   --main-background-color: white;
   --main-text-color: black;
   --main-border-color: #ccc;
   --dropdown-border-color: #ccc;
   --dropdown-shadow-opacity: .2;
   --dropdown-item-icon-destructive-color: #ec5138;
   --disabled-tooltip-icon-color: #004382;

   --accented-background-color: #f5f5f5;
   --more-accented-background-color: #ddd;

   --button-background-color: transparent;
   --button-border-color: #ddd;
   --button-text-color: black;
   --button-border-radius: 5px;
   --button-disabled-background-color: #ddd;
   --button-disabled-text-color: black;

   --primary-button-background-color: #6c757d;
   --primary-button-text-color: white;
   --primary-button-border-color: #6c757d;

   --muted-text-color: #666;

   --input-text-color: black;
   --input-background-color: transparent;

   --hover-item-text-color: black;
   --hover-item-background-color: transparent;
   --hover-item-border-color: #ccc;

   --active-item-text-color: black;
   --active-item-background-color: #ddd;
   --active-item-border-color: transparent;

   --menu-text-color: black;
   --menu-background-color: #ffffffd9;

   --modal-background-color: white;
   --modal-backdrop-color: black;

   --left-pane-background-color: #f2f2f2;
   --left-pane-text-color: #383838;
   --left-pane-item-hover-background: #eaeaea;
   --left-pane-item-selected-background: white;
   --left-pane-item-selected-color: black;
   --left-pane-item-selected-shadow: 1px 1px 2px rgba(0, 0, 0, .2);
   --left-pane-item-action-button-background: #d7d7d7;
   --left-pane-item-action-button-hover-background: white;
   --left-pane-item-action-button-hover-shadow: 2px 2px 3px rgba(0, 0, 0, .15);
   --left-pane-item-selected-action-button-hover-shadow: 2px 2px 10px rgba(0, 0, 0, .25);

   --launcher-pane-background-color: #e8e8e8;
   --launcher-pane-text-color: #464646;
   --launcher-pane-button-hover-color: black;
   --launcher-pane-button-hover-background: white;
   --launcher-pane-button-hover-shadow: 4px 4px 4px rgba(0, 0, 0, .075);

   --root-background: var(--left-pane-background-color);

   --gutter-color: transparent;
   --gutter-hover-color: #bfbfbf;

   --active-tab-background-color: white;
   --active-tab-hover-background-color: var(--active-tab-background-color);
   --active-tab-text-color: black;
   --active-tab-shadow: 3px 3px 6px rgba(0, 0, 0, .1);

   --inactive-tab-background-color: transparent;
   --inactive-tab-hover-background-color: var(--left-pane-item-hover-background);
   --inactive-tab-text-color: #666;

   --scrollbar-border-color: #ddd;
   --scrollbar-background-color: #ddd;
   --tooltip-background-color: #f8f8f8;
   --link-color: blue;

   --mermaid-theme: default;

   --toc-item-hover-background: #ececec;

   --code-block-box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.1), 0px 0px 2px rgba(0, 0, 0, 0.2);
}

/* 
 * Dark color scheme
 */

@media (prefers-color-scheme: dark) {
    :root {
        --theme-style: dark;        
    
        --main-background-color: #333;
        --main-text-color: #ccc;
        --main-border-color: #aaa;
        --dropdown-border-color: #555;
        --dropdown-shadow-opacity: .4;
        --dropdown-item-icon-destructive-color: #de6e5b;
        --disabled-tooltip-icon-color: #7fd2ef;
    
    
        --accented-background-color: #555;
        --more-accented-background-color: #777;
    
        --button-background-color: transparent;
        --button-border-color: #ccc;
        --button-text-color: currentColor;
        --button-border-radius: 5px;
        --button-disabled-background-color: transparent;
        --button-disabled-text-color: #999;
    
        --primary-button-background-color: #888;
        --primary-button-text-color: white;
        --primary-button-border-color: #999;
    
        --muted-text-color: #bbb;
    
        --input-text-color: #ccc;
        --input-background-color: #333;
    
        --hover-item-text-color: #ccc;
        --hover-item-background-color: transparent;
        --hover-item-border-color: #aaa;
    
        --active-item-text-color: black;
        --active-item-background-color: #777;
        --active-item-border-color: transparent;
    
        --menu-text-color: white;
        --menu-background-color: #222222d9;
    
        --modal-background-color: #333;
        --modal-backdrop-color: #444;
    
        --left-pane-background-color: #1f1f1f;
        --left-pane-text-color: #AAAAAA;
        --left-pane-item-hover-background: #eaeaea;
        --left-pane-item-selected-background: white;
        --left-pane-item-selected-color: black;
        --left-pane-item-selected-shadow: 1px 1px 2px rgba(0, 0, 0, .2);
        --left-pane-item-action-button-background: #d7d7d7;
        --left-pane-item-action-button-hover-background: white;
        --left-pane-item-action-button-hover-shadow: 2px 2px 3px rgba(0, 0, 0, .15);
        --left-pane-item-selected-action-button-hover-shadow: 2px 2px 10px rgba(0, 0, 0, .25);
     
        --launcher-pane-background-color: #1f1f1f;
        --launcher-pane-text-color: #AAAAAA;
        --launcher-pane-button-hover-color: black;
        --launcher-pane-button-hover-background: white;
        --launcher-pane-button-hover-shadow: 4px 4px 4px rgba(0, 0, 0, .075);

        --root-background: var(--left-pane-background-color);

        --gutter-color: #e7e7e7;
        --gutter-hover-color: #bfbfbf;
    
        --active-tab-background-color: #666;
        --active-tab-hover-background-color: #737373;
        --active-tab-text-color: #ccc;
        --active-tab-shadow: 3px 3px 6px rgba(0, 0, 0, .1);
    
        --inactive-tab-background-color: #444;
        --inactive-tab-hover-background-color: #525252;
        --inactive-tab-text-color: #bbb;
    
        --scrollbar-border-color: #666;
        --scrollbar-background-color: #333;
        --tooltip-background-color: #333;
        --link-color: lightskyblue;
    
        --toc-item-hover-background: #ececec;

        --mermaid-theme: dark;

        --code-block-box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
    }
    
    body ::-webkit-calendar-picker-indicator {
        filter: invert(1);
    }
    
    body .CodeMirror {
        filter: invert(90%) hue-rotate(180deg);
    }
    
    .excalidraw.theme--dark {
        --theme-filter: invert(80%) hue-rotate(180deg) !important;
    }
    
    body .todo-list input[type="checkbox"]:not(:checked):before {
        border-color: var(--muted-text-color) !important;
    }
    
    .btn-close {
        filter: invert(1);
    }
}

/*
 * USER INTERFACE
 */

 @keyframes fade-in {
    from {
        opacity: 0;
    } to {
        opacity: 1;
    }
}

#root-widget {
    background-color: var(--root-background);
}


/*
 *  Launcher pane
 */

#launcher-pane.vertical {
    width: var(--launcher-pane-size) !important;
    padding-bottom: var(--launcher-pane-button-gap);
}

#launcher-pane.vertical .launcher-button {
    width: calc(var(--launcher-pane-size) - (var(--launcher-pane-button-margin) * 2)) !important;
    height: calc(var(--launcher-pane-size) - (var(--launcher-pane-button-margin) * 2)) !important;
    margin: var(--launcher-pane-button-gap) var(--launcher-pane-button-margin);
    padding: 0 !important;
    border-radius: 8px;
    transition: background-color 300ms ease-out,
                color 300ms ease-out,
                box-shadow 300ms ease-out;
    cursor: default;
}

#launcher-pane.vertical .launcher-button:active,
#launcher-pane.vertical .launcher-button.show {
    transform: scale(0.9);
    transition: transform 50ms linear;
}

#launcher-pane.vertical .launcher-button:hover,
#launcher-pane.vertical .launcher-button.right-dropdown-button.show {
    background: var(--launcher-pane-button-hover-background);
    color: var(--launcher-pane-button-hover-color);
    box-shadow: var(--launcher-pane-button-hover-shadow);
    transition: background-color 100ms ease-in,
                color 80ms ease-in,
                box-shadow 100ms ease-in;
}

/*
 * Left pane
 */

#left-pane .tree-actions {
    /* TODO: relocate instead of hiding */
    display: none;
}

#left-pane div.tree {
    padding: 0 12px;
    animation: fade-in 200ms ease-in;
}

#left-pane span.fancytree-node {
    border: unset;
    border-radius: 6px;
    cursor: default;
}

/* The root element of the tree */
#left-pane .fancytree-container > li:first-child > span {
    padding-left: 12px;
}

#left-pane span.fancytree-node.fancytree-active {
    position: relative;
    background: transparent !important;
    color: var(--left-pane-item-selected-color) !important;
}

@keyframes left-pane-item-select {
    from {
        opacity: 0;
    } to {
        opacity: 1;
    }
}

#left-pane span.fancytree-node.fancytree-active::before {
    position: absolute;
    content: "";
    top: var(--left-pane-item-selected-shadow-size);
    left: var(--left-pane-item-selected-shadow-size);
    bottom: var(--left-pane-item-selected-shadow-size);
    right: var(--left-pane-item-selected-shadow-size);
    background: var(--left-pane-item-selected-background) !important;
    box-shadow: var(--left-pane-item-selected-shadow);
    border-radius: 6px;
    animation: left-pane-item-select 200ms ease-out;
    z-index: -1;
}

#left-pane .fancytree-expander {
    opacity: .65;
    transition: opacity 150ms ease-in;
}

#left-pane .fancytree-expander:hover {
    opacity: 1;
    transition: opacity 300ms ease-out;
}

#left-pane .fancytree-custom-icon {
    margin-top: 0; /* Use this to align the icon with the tree view item's caption */
}

#left-pane span .fancytree-title {
    margin-top: -5px;
}

#left-pane span.fancytree-active .fancytree-title {
    font-weight: normal;
}

#left-pane span.fancytree-node:hover {
    background: var(--left-pane-item-hover-background);
}

#left-pane span.fancytree-node.shared .fancytree-title::after {
    opacity: .5;
}

#left-pane .tree-item-button {
    margin-right: 6px;
    border: unset;
    border-radius: 50%;
    background: var(--left-pane-item-action-button-background);
    transition: background-color 300ms ease-out,
                box-shadow 300ms ease-out;
}

#left-pane .tree-item-button:hover {
    background: var(--left-pane-item-action-button-hover-background);
    box-shadow: var(--left-pane-item-action-button-hover-shadow);
    transition: background-color 100ms ease-in,
                box-shadow 100ms ease-in;
}

#left-pane span.fancytree-node.fancytree-active .tree-item-button:hover {
    box-shadow: var(--left-pane-item-selected-action-button-hover-shadow);
}

/*
 * Gutter
 */

.gutter {
    background: var(--gutter-color) !important;
    transition: background 150ms ease-out;
}

.gutter:hover {
    background: var(--gutter-hover-color) !important;
    transition: background 300ms ease-in;
}

/*
 * Tab bar
 */

/* The parent element of the tab bar */
#rest-pane > div.component:first-child {
    height: var(--tab-bar-height) !important;
}

.tab-row-widget {
    background: transparent !important;
}

.tab-row-widget-container {
    margin-top: calc((var(--tab-bar-height) - var(--tab-height)) / 2);
    height: var(--tab-height) !important;
}

.tab-row-widget .note-tab .note-tab-wrapper {
    height: var(--tab-height) !important;
}

.tab-row-widget .note-tab:nth-child(1) {
    transform: translate3d(var(--tab-first-item-horiz-offset), 0, 0);
}

.tab-row-widget .note-tab[active] .note-tab-wrapper {
    box-shadow: var(--active-tab-shadow);
    font-weight: unset !important;
}

/*
 * Center pane
 */

 #center-pane {
    background: var(--main-background-color);
 }


/*
 * Table of contents & Highlights list
 */

#right-pane {
    background: var(--main-background-color);
}

#right-pane .toc li,
#right-pane .highlights-list li {
    padding: 2px 8px;
    border-radius: 4px;
    text-align: unset;
    transition: background-color 150ms ease-in;
}

#right-pane .highlights-list li {
    line-height: 1.2;
    padding: 8px;
}

#right-pane .toc li::marker,
#right-pane .highlights-list li::marker {
    color: var(--muted-text-color);
}

#right-pane .toc li:hover,
#right-pane .highlights-list li:hover {
    background: var(--toc-item-hover-background);
    font-weight: normal;
    transition: background-color 300ms ease-out;
}

#right-pane .toc li:active,
#right-pane .highlights-list li:active {
    background: transparent;
    transition: none;
}

/*
 * Menus
 */

.dropdown-menu {
    backdrop-filter: blur(10px) saturate(6);
}

/*
 * TEXT NOTES
 */

/*
 * Code Blocks 
 */

.ck-content pre {
    border: 0;
    border-radius: 6px;
    box-shadow: var(--code-block-box-shadow);
    padding: 0 !important;
    margin-top: 2px !important;
    overflow: unset;
}

html .note-detail-editable-text :not(figure, .include-note):first-child {
    /* Create some space for the top-side shadow */
    margin-top: 1px !important;
}

.ck.ck-editor__editable pre[data-language]::after {
    --ck-color-code-block-label-background: rgba(128, 128, 128, .5);
    border-radius: 0 0 5px 5px;
    padding: 0px 10px;
    letter-spacing: .5px;
    font-weight: bold;
}

.ck-content pre code {
    display: block;
    padding: 1em;
    overflow: auto;
}

.ck-content pre code::-webkit-scrollbar {
    height: 6px;
}

.ck-content pre code::-webkit-scrollbar-thumb {
    height: 4px;
    border: none !important;
    background: gray !important;
}

.ck-content pre code::-webkit-scrollbar-track, ::-webkit-scrollbar-thumb {
    cursor: default;
}

.note-detail-printable:not(.word-wrap) pre code {
    white-space: pre;
    margin-right: 1em;
}

.code-sample-wrapper .hljs {
    transition: background-color linear 100ms;
}