Google colab dark black by ycy

/* ==UserStyle==
@name           ?
@namespace      github.com/openstyles/stylus
@version        1.0.0
@description    A new userstyle
@author         Me
==/UserStyle== */
@-moz-document url-prefix("https://colab.research.google.com") {
    @import url(https://fonts.googleapis.com/css2?family=Helvetica:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap);

    div.notebook-content-background {
        background-color: #000000;
    }

    div.text-top-div {
        background-color: #000000;
    }

    div.main-content {
        background-color: #000000;
    }

    div.notebook-content {
        background-color: #000000;
        font-family: Helvetica;
    }

    div.left-pane-top {
        background-color: #000000;
    }

    div.flex {
        background-color: #000000;
    }

    colab-notebook-toolbar.horizontal.layout.center.noshrink {
        background-color: #000000;
    }

    #header-logo {
        background-color: #000000;
    }

    div.add-cell {
        background-color: #000000;
    }

    div.inputarea.horizontal.layout.code {
        background-color: #000000;
        border-color: #434343;
        border-style: dotted;
    }

    div.view-line {
        background-color: #000000;
    }

    div div div {
        background-color: #000000;
    }

    div div colab-static-output-renderer {
        background-color: #000000;
    }

    span.mtk1 {
        color: #666666;
    }

    div span p {
        font-family: Helvetica;
    }

    span div h2 {
        font-family: Helvetica;
    }

    div span h1 {
        font-family: Helvetica;
    }
}