shapez/src/css/ingame_hud/buildings_toolbar.scss

#ingame_HUD_buildings_toolbar {
    position: fixed;
    @include S(bottom, 0px);
    left: 50%;
    transform: translateX(-50%);

    $toolbarBg: rgba($accentColorBright, 0.9);
    display: flex;
    flex-direction: column;
    background-color: $toolbarBg;
    // border: $ingameHudBorder;
    border-bottom-width: 0;

    @include S(border-radius, 4px, 4px, 0, 0);
    // box-shadow: 0 0 0 #{D(2px)} rgba(darken($toolbarBg, 20), 0.5);
    transition: transform 0.12s ease-in-out;

    &:not(.visible) {
        transform: translateX(-50%) translateY(#{D(100px)});
    }

    .buildings {
        display: grid;
        grid-auto-flow: column;
        @include S(padding, 0, 5px);

        .building {
            color: $accentColorDark;
            display: flex;
            flex-direction: column;
            position: relative;
            align-items: center;
            justify-content: center;
            @include S(padding, 5px);
            @include S(padding-bottom, 7px);
            $buildingIconSize: 32px;

            &:not(.unlocked) {
                @include S(width, 30px);
                .tooltip {
                    display: none !important;
                }
                .keybinding,
                .iconWrap {
                    opacity: 0.01;
                }
                &::before {
                    opacity: 0.5;
                    content: " ";
                    background: uiResource("locked_building.png") center center / #{D(20px)} #{D(20px)}
                        no-repeat;
                    position: absolute;
                    top: 0;
                    right: 0;
                    bottom: 0;
                    left: 0;
                    z-index: 4;
                }
            }

            &.selected {
                background: rgb(173, 221, 253) !important;
                transform: scale(1.05);
                .keybinding {
                    color: #111;
                }
            }

            pointer-events: all;
            transition: all 0.1s ease-in-out;
            transition-property: background-color, transform;
            &.unlocked:hover {
                background: rgba($accentColorDark, 0.1);
                cursor: pointer;
            }

            .iconWrap {
                position: relative;
                @include S(width, $buildingIconSize);
                @include S(height, $buildingIconSize);
                @include S(margin-top, 3px);
                @include S(margin-bottom, 6px);
            }

            .label {
                @include SuperSmallText;
                display: none;
                font-weight: bold;
                text-transform: uppercase;
            }

            .keybinding {
                // position: relative;
                right: 50%;
                transform: translateX(50%);
                background: transparent;
                border: 0;
                @include S(bottom, 2pxpx);
            }

            &[data-tilewidth="2"] {
                .iconWrap {
                    @include S(width, 2 * $buildingIconSize);
                }
            }

            &:last-child {
                border: none;
            }

            .tooltip {
                position: absolute;
                pointer-events: none;
                background: #333;
                @include S(padding, 7px);
                bottom: calc(100% + #{D(10px)});
                left: 50%;
                transform: translateX(-50%);
                box-sizing: content-box;
                @include SuperSmallText;
                @include S(width, 200px);
                @include S(border-radius, 4px);

                box-shadow: #{D(1px)} #{D(1px)} 0 0 rgba(0, 10, 25, 0.2);

                display: none;
                z-index: 9999;

                flex-direction: column;

                .title {
                    color: #fff;
                    @include PlainText;
                    text-transform: uppercase;
                    margin-bottom: 5px;
                }

                .desc {
                    color: #aaa;
                    @include SuperSmallText;
                    margin-bottom: 10px;
                    strong {
                        color: #fff;
                    }
                }

                .tutorialImage {
                    display: inline-block;
                    @include S(width, 200px);
                    @include S(height, 200px);
                    @include S(border-radius, 4px);
                    background-size: contain;
                    background-repeat: no-repeat;
                }

                &::after {
                    top: 100%;
                    left: 50%;
                    border: solid transparent;
                    content: " ";
                    height: 0;
                    width: 0;
                    position: absolute;
                    pointer-events: none;
                    border-top-color: #333;
                    @include S(border-width, 5px);
                    transform: translateX(-50%);
                }
            }

            &:hover .tooltip {
                display: flex;

                @include InlineAnimation(0.5s ease-in-out) {
                    90% {
                        opacity: 0;
                    }
                    0% {
                        transform: translate(-50%, 5%) scale(0.9);
                        opacity: 0;
                    }
                }
            }
        }
    }
}