@mixin sublevel-line($_level-left: 0) {
    position: absolute;
    top: 0;
    bottom: 0;
    left: $_level-left - $o-we-border-width;
    border: $o-we-border-width solid var(--o-hb-row-sublevel-color, #{mix($o-we-bg-lighter, $o-we-fg-light)});
    border-width: 0 0 $o-we-border-width $o-we-border-width;
    pointer-events: none;
    transform: translate(0, ($o-hb-row-min-height + $o-hb-row-spacing) * -0.5 + $o-we-border-width);
    content: "";
}

.hb-row {
    $_z-index: 4;

    .popover & {
        --o-hb-row-bg-color: var(--o-hb-row-bg-color-popover, --popover-bg);
        --o-hb-row-active-bg-color: var(--o-hb-row-active-bg-color-popover, #{mix($o-we-color-accent, $o-we-fg-lighter, 20%)});
        --o-hb-row-color: var(--o-hb-row-color-popover, #{$o-we-bg-lightest});
        --o-hb-row-color-active: var(--o-hb-row-color-active-popover, #{$o-we-bg-darkest});
        --o-hb-row-sublevel-color: var(--o-hb-row-sublevel-color-popover, #{mix($o-we-bg-lighter, $o-we-fg-light)});
        .hb-row-content:has(button.fa-trash) {
            align-items: stretch;
        }
        .hb-row-label {
            flex: 0 0 38%;
        }
        .hb-row-content {
            flex: 0 0 62%;
        }
    }

    --o-hb-btn-minHeight: #{$o-hb-row-min-height - ($o-hb-row-spacing * 0.5)};

    min-height: $o-hb-row-min-height;
    padding-top: $o-hb-row-spacing;
    box-sizing: content-box;
    align-items: center;
    color: var(--o-hb-row-color, #{$o-we-fg-dark});

    .hb-container-subtitle {
        padding: $o-hb-row-spacing 0 $o-hb-row-spacing $o-hb-row-padding-left;
    }

    .hb-row-label {
        min-width: 0;
        flex: 0 0 44%;
        z-index: $_z-index;
        background-color: var(--o-hb-row-bg-color, #{$o-we-bg-lighter});
        padding: $o-hb-row-spacing 0 $o-hb-row-spacing $o-hb-row-padding-left;
        align-self: baseline;
    }

    .hb-row-content {
        --hb-row-content-gap: 2%;

        flex: 0 0 56%;
        width: 56%;
        align-items: center;
        gap: var(--hb-row-content-gap);
        z-index: $_z-index; // Make sure outlines / shadows are not trimmed.
    }

    .o_hb_collapse_toggler {
        position: absolute;
        padding-left: $o-hb-row-spacing;
        align-self: baseline;
        z-index: $_z-index + 1;
        box-shadow: none;
        font-size: 1em;
        color: inherit;

        &.active i {
            margin-left: -1px;
        }
    }

    .icon-sup {
        position: relative;
        top: -0.4em;
        margin-left: 0.2em;
        font-size: 0.65em;
    }

    &:has(> div > .o_cc_preview_wrapper) > .o_hb_collapse_toggler {
        align-self: center;
    }

    // ==== States
    &:hover, &.active {
        .hb-row-content {
            color: var(--o-hb-row-color-active, #{$o-we-fg-lighter});
        }
    }

    &:has(.hb-row-content:hover) {
        color: var(--o-hb-row-color-active, #{$o-we-fg-lighter});
    }

    &:has(.hb-row-label-actionable:hover) .o_hb_collapse_toggler {
        color: var(--o-hb-row-color-active, #{$o-we-fg-lighter});
    }

    &.active {
        background-color: var(--o-hb-row-active-bg-color, #{mix($o-we-color-accent, $o-we-bg-dark, 20%)});

        .hb-row-label {
            background-color: inherit;
        }
    }

    // Actionable labels hover states are currently dependant on the
    // presence of a collapsable icon. Should be improved using states.
    .o_hb_collapse_toggler:where(:not(.d-none)) + .hb-row-label-actionable:hover {
        cursor: pointer;
        color: var(--o-hb-row-color-active, #{$o-we-fg-lighter});
    }

    // ==== Sublevels
    &.hb-row-sublevel > .hb-row-label::after {
        @include sublevel-line;
    }

    // Sublevel specific rules
    @for $_level from 1 through 3 {
        $_level-padding: $o-hb-row-padding-left + ($o-hb-row-indent-left * $_level);
        $_level-width: $o-hb-row-spacing + $o-we-border-width;
        $_level-left: $_level-padding - $_level-width - $o-we-border-width;

        &.hb-row-sublevel-#{$_level} {
            .hb-row-label, & > .hb-row-label::after {
                z-index: $_z-index - $_level;
            }

            .hb-row-label {
                padding-left: $_level-padding;
            }

            & > .hb-row-label::after {
                width: $_level-width;
                left: $_level-left - $o-we-border-width;
            }
        }

        &[data-label=" "]:not(.hb-row-sublevel):has(+ .hb-row-sublevel-#{$_level})::after {
            @include sublevel-line($_level-left);
            z-index: $_z-index - $_level;
        }
    }

    & + .hb-collapse-content {
        overflow: hidden;
        height: 0; // default collapsed state
        transition: height 0.35s ease;
    }
}
