@keyframes CW {
    from { transform: rotateZ(0deg); }
    to { transform: rotateZ(360deg); }
}

@keyframes CCW {
    from { transform: rotateZ(360deg); }
    to { transform: rotateZ(0deg); }
}

.light > body > .button.toggle-ui-mode > svg {
    &.light { display: block; }
    &.dark { display: none; }
}

:not(.light) > body > .button.toggle-ui-mode > svg {
    &.light { display: none; }
    &.dark { display: block; }
}

.no-transition * { transition: none !important; }
.no-transition #side-bar { transition: none !important; }
.no-transition #sidebar-resize-handle { transition: none !important; }

body {
    --top-bar-size: 7vmin;
    --side-bar-size: 30vw;

    &:has(#side-bar.collapsed) { --side-bar-size: 0vmin !important; }

    position: fixed;
    left: 0; top: 0;
    width: 100vw; height: 100vh;

    padding: 0; margin: 0;

    font: normal 1.75vmin "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-1);

    background: var(--background);

    & > #file-input { display: none; }

    & > #loading {
        z-index: 2147483647;

        position: fixed;
        left: 0; top: 0;
        width: 100vw; height: 100vh;

        background: inherit;
        opacity: 1;

        transition: all ease-out .5s;

        &.hidden {
            pointer-events: none;

            opacity: 0;
        }

        & > svg {
            aspect-ratio: 1/1;

            position: absolute;
            left: calc(50% - 12.5vmin);
            top: calc(50% - 12.5vmin);
            width: 25vmin;

            color: var(--text-4);

            animation: CW 1.5s linear infinite;
        }
    }

    & > #cover {
        z-index: 3;
        display: none;

        cursor: not-allowed;

        position: fixed;
        left: 0; top: 0;
        width: 100vw; height: 100vh;

        background: #000b;
    }

    &:has(.float:not(.hidden)) > #cover {
        display: block;
    }

    & > .float {
        z-index: 4;

        position: fixed;
        left: 50%; top: 50%;
        width: 80%; height: 80%;

        padding: 2vmin;
        border-radius: 1vmin;
        border: .1vmin solid var(--shade-3-0);

        background: var(--shade-0-2);

        transform: translate(-50%, -50%);

        &.hidden { display: none; }

        & > .title {
            pointer-events: none;

            position: absolute;
            left: 0;
            top: calc(-1.5vmin - 1.2em + .4vmin);
            width: 100%; height: 3em;

            padding: 0; margin: 0;
            border: 0;

            font-size: 2em;
            text-align: center;
            color: var(--text-1);

            & > .text {
                pointer-events: auto;

                padding: .75vmin 2vmin;

                border: .1vmin solid var(--shade-3-0);
                border-bottom: none;
                border-top-left-radius: 1vmin;
                border-top-right-radius: 1vmin;

                background: var(--shade-0-2);
            }
        }

        & > .subtitle {
            position: absolute;
            left: 0; top: 1vmin;
            width: 100%; height: 2em;

            padding: 0; margin: 0;
            border: 0;

            font-size: 1.1em;
            text-align: center;
            color: var(--subtitle-2);
        }
    }

    & > .button.toggle-ui-mode {
        z-index: 5;
        cursor: pointer;

        aspect-ratio: 1/1;

        position: absolute;
        bottom: 1vmin; left: 1vmin;
        height: 3.5em;

        border-radius: 50%;

        background: var(--shade-1-2);
        opacity: .75;

        -webkit-backdrop-filter: blur(.2vmin);
        backdrop-filter: blur(.2vmin);

        & > svg {
            scale: .75;
            &.disabled { display: none; }
        }
    }

    & > #sidebar-resize-handle {
        z-index: 3;
        cursor: ew-resize;

        position: fixed;
        right: var(--side-bar-size);
        top: 0;
        width: .5vmin;
        height: 100vh;

        background: transparent;
        transition: background-color .25s, width .25s;

        &:hover {
            background: var(--accent-1);
            width: 1vmin;
        }

        &.dragging {
            background: var(--accent-1);
            width: 1vmin;
        }

        body:has(#side-bar.collapsed) & {
            display: none;
        }
    }

    & .button-plus {
        color: var(--text-1);

        transition: all .25s;

        &.disabled {
            pointer-events: none;

            background: transparent;
            filter: opacity(.1);
        }

        & > .icon {
            cursor: pointer;

            aspect-ratio: 3/2;

            height: 100%;

            border-radius: .75vmin;

            background: var(--shade-1-2);

            transition: all .25s;

            &:has(img.cancel:not(.hidden), svg.cancel:not(.hidden)) {
                --hover-color: var(--red-hover);
                --active-color: var(--red-active);
            }

            &:hover {
                background: var(--hover-color);
                &:active { background: var(--active-color); }
            }

            & > img, & > svg {
                aspect-ratio: 1/1;

                position: absolute;
                left: 50%; top: 50%;
                height: 75%;

                opacity: 1;

                transform: translate(-50%, -50%);
                transition: all .25s;

                &.hidden {
                    pointer-events: none;
                    opacity: 0;
                }

                &.cancel {
                    --hover-color: var(--red-hover);
                    --active-color: var(--red-active);
                }
            }
        }

        & > div.cycles {
            position: absolute;

            &:has(> div[data-float="left"]) {
                --x-translate: 0%;
                left: 0;
            }
            &:has(> div[data-float="center"]) {
                --x-translate: -50%;
                left: 50%;
            }
            &:has(> div[data-float="right"]) {
                --x-translate: 0%;
                right: 0;
            }

            &[data-float="top"] {
                --y-origin: bottom;

                top: -1vmin;
                transform: translate(var(--x-translate), -100%);

                & > div {
                    border-bottom-left-radius: 0;
                    border-bottom-right-radius: 0;
                }
            }
            &[data-float="bottom"] {
                --y-origin: top;

                bottom: -1vmin;
                transform: translate(var(--x-translate), 100%);

                & > div {
                    border-top-left-radius: 0;
                    border-top-right-radius: 0;
                }
            }

            &:not(:has(> div:not(.hidden))) { pointer-events: none; }

            & > div {
                z-index: 3;

                display: flex;
                flex-direction: row;
                justify-content: center;
                align-items: center;
                gap: 2vmin;

                border-radius: 1vmin;

                background: var(--shade-1-2);

                transform-origin: var(--y-origin) center;
                transform: scale(1, 1);

                transition: all .25s ease-in-out;

                &.hidden {
                    pointer-events: none;
                    opacity: 0;
                    transform: scale(1, 0);
                }

                &[data-float="left"] {
                    left: 0;
                    transform-origin: var(--y-origin) left;
                }
                &[data-float="center"] {
                    left: 50%;
                    transform-origin: var(--y-origin) center;
                }
                &[data-float="right"] {
                    right: 0;
                    transform-origin: var(--y-origin) right;
                }

                & > .divider {
                    width: .1vmin;
                    height: calc(1em + .5vmin);

                    background: var(--text-1);
                }
            }
        }

        & > div.trigger, & > div.terminus { display: none; }
    }

    & * {
        -webkit-user-select: none;
        user-select: none;

        &.selectable {
            -webkit-user-select: text;
            user-select: text;
        }
        &.button {
            cursor: pointer;
            color: var(--text-1);

            transition: all .25s;
            &:hover {
                filter: opacity(0.8);
                &:active { filter: opacity(.6); }
            }
        }
        &.simple-button {
            cursor: pointer;
            color: var(--text-1);

            transition: all .25s;
        }

        &.auto-scroll {
            overflow-x: auto;
            overflow-y: hidden;

            white-space: nowrap;

            &::-webkit-scrollbar { display: none; } /* Chrome, Safari, Opera */
            scrollbar-width: none; /* Firefox */
            -ms-overflow-style: none; /* Internet Explorer and Edge */

            & > .scroll-text {
                display: inline-block;
                margin: 0 1em;
            }
            &:not(:has(> .scroll-text)) { opacity: 0; }
        }

        &.tooltip {
            z-index: 2147483646;

            pointer-events: none;

            display: block;
            position: fixed;

            outline: .2vmin solid var(--shade-5-0);
            border-radius: 1vmin;
            padding: 1vmin;

            opacity: .95;
            background: var(--shade-1-0);
            box-shadow: 0 0 1vmin rgba(0, 0, 0, 0.2);

            -webkit-backdrop-filter: blur(.5vmin);
            backdrop-filter: blur(.5vmin);
        }

        &.notification {
            z-index: 2147483645;

            position: fixed;
            bottom: 2vmin; left: 50%;
            transform: translateX(-50%);

            padding: 1vmin 1.5vmin;
            border-radius: 1vmin;

            color: var(--notification-text);
            font-size: 1.1em;
        }
    }

    /* Inset styling for input elements */
    .inset, :is(input, textarea, select, [contenteditable="true"], [contenteditable="plaintext-only"]):not(.no-inset) {
        box-shadow:
            inset 0 .2vmin .4vmin rgba(0, 0, 0, 0.6),
            inset 0 .1vmin .2vmin rgba(0, 0, 0, 0.4),
            inset 0 -.1vmin .1vmin rgba(255, 255, 255, 0.1);
        border-radius: 1vmin;
    }

    /* Outset styling */
    .outset { /* make element look like it pops up */
        box-shadow:
            0 .2vmin .4vmin rgba(0, 0, 0, 0.6),
            0 .1vmin .2vmin rgba(0, 0, 0, 0.4),
            0 -.1vmin .1vmin rgba(255, 255, 255, 0.3);

        &:hover { /* make element pop out more */
            transform: translateY(-.25vmin);
            box-shadow:
                0 .3vmin .6vmin rgba(0, 0, 0, 0.6),
                0 .2vmin .4vmin rgba(0, 0, 0, 0.4),
                0 -.1vmin .1vmin rgba(255, 255, 255, 0.3);
        }
    }

    & #buymeacoffee {
        cursor: pointer;

        z-index: 2147483647;

        display: none;

        position: fixed;
        right: 1vmin; top: 1vmin;
        height: calc(var(--top-bar-size) * .5);
    }
}

/* Responsive CSS variables for narrow displays */
@media (max-width: 768px), (max-aspect-ratio: 1/1) {
    body {
        /* On narrow displays, the side-bar doesn't take horizontal space */
        --side-bar-size: 0vmin;

        /* Reset even when collapsed since it's bottom overlay */
        &:has(#side-bar.collapsed) {
            --side-bar-size: 0vmin;
        }
    }
}