Makes Google Docs look a little bit more like Dropbox Paper

google-docs-override.css

body.light #docs-editor {
    background-color: #fff !important;
}

.kix-paginateddocumentplugin, .kix-paginateddocumentplugin-compact-mode {
    box-shadow: none !important; 
}

body.focus-off .kix-paginateddocumentplugin, body.focus-off .kix-paginateddocumentplugin-compact-mode {
    box-shadow: 0 0 0 0.75pt #d1d1d1, 0 0 3pt 0.75pt #ccc !important; 
}

.kix-page::before, .kix-page-compact::before {
    border-top-width: 0 !important;
}

body.focus-off .kix-page::before, body.focus-off .kix-page-compact::before {
    border-top-width: 1px !important;
}

body.dark #docs-editor {
    background-color: #222 !important;
}

body.dark .kix-page,
body.dark .kix-page-content-wrapper {
    background-color: #222 !important;
}

body.dark .kix-wordhtmlgenerator-word-node {
    color: #ffffff !important;
}

body.dark .docs-explore-widget {
    background-color: rgba(255,255,255,.25);
}

body.light .docs-explore-widget {
    background-color: rgba(255,255,255,1);
}

body.dark .kix-tablerenderer-td {
    border-color: rgba(255,255,255,.15) !important;
}

body.dark .kix-commentoverlayrenderer-normal {
    background-color: rgba(160,0,255, .4) !important;
}

body.dark .kix-commentoverlayrenderer-highlighted {
    background-color: rgba(160,0,255, .6) !important;
}

body.light .kix-commentoverlayrenderer-normal {
    background-color: rgba(160,255,0, .4) !important;
}

body.light .kix-commentoverlayrenderer-highlighted {
    background-color: rgba(160,255,0, .6) !important;
}

body.dark .kix-paginateddocumentplugin > div:last-of-type,
body.dark .kix-paginateddocumentplugin-compact-mode > div:last-of-type {
    background-color: #222 !important;
}