Compact JIRA with green stories (gold for the empties)

compact-jira.user.css

/* ==UserStyle==
@name         Compact JIRA
@namespace    https://gist.github.com/PedroHLC/2c124b8ae453c6b926dfe565faa14ccd
@homepageURL  https://gist.github.com/PedroHLC/2c124b8ae453c6b926dfe565faa14ccd
@updateURL    https://gist.githubusercontent.com/PedroHLC/2c124b8ae453c6b926dfe565faa14ccd/raw/compact-jira.user.css
@version      0.9.6
@license      Other
@description  Slim, with green stories and gold for empty stories
@author       PedroHLC (https://pedrohlc.com)
==/UserStyle== */
@-moz-document domain("atlassian.net") {

.ghx-column:last-child,
.ghx-column:last-child {
    width: 240px !important;
    opacity: 0.7
}

.ghx-issue-subtask,
.ghx-type-10001,
.ghx-type-10002,
.ghx-type-10004 {
    display: flex;
}

.ghx-column:last-child .ghx-issue {
    display: block !important;
    height: 14px;
    overflow: hidden;
}

.ghx-column:last-child .ghx-stat-fields {
    display: none;
}

.ghx-summary {
    flex: 1;
}

.ghx-issue .ghx-stat-fields > .ghx-row {
    margin-top: 0;
}

.adg3 .ghx-column .ghx-parent-group {
    background: lightgreen;
}
.js-parent-drag > .js-parent-drag{
    background: darkgreen;
}
:not(.ghx-parent-group) > .js-parent-drag.ghx-type-10001 {
    background: gold;
}
:not(.ghx-parent-group) > .js-parent-drag.ghx-type-10002 {
    background: dodgerblue;
}
:not(.ghx-parent-group) > .js-parent-drag.ghx-type-10004 {
    background: crimson;
}

.ghx-type-10001 > .ghx-summary {
    color: white;
}
:not(.ghx-parent-group) > .ghx-type-10001.js-parent-drag > .ghx-summary {
    color: black;
}
.ghx-group > .ghx-key {
    color: lightgray;
}

.ghx-issue > section + section {
    margin-top: 0;
}

.ghx-issue .ghx-summary {
    flex: 10;
}

.ghx-issue > section:nth-child(2) {
    flex: 3;
}

}

Preview:

Compatible with http://userstyles.org/styles/179379
(Dark theme)