lektor-admin-style-overrides.css

:root {
    --ultra-light-gray: #eee;
    --light-gray: #ccc;
    --dark-gray: #444;
    --gray: #999;
    --black: #000;
    --accent-1: #0098f8;
    --accent-2: #00b4a6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Lucida Grande', sans-serif;
}

/* header bar */
div.application header {
    background-color: var(--black);
}

div.application header a:hover {
    color: white;
    opacity: 0.5;
}

/* field labels */
.edit-area dl.field dt {
    background: none;
    padding-left: 0;
    color: var(--gray);
}

/* sidebar menu */

div.application div.editor nav.sidebar h3 {
    background-color: var(--accent-2);
}

div.application div.editor nav.sidebar ul.nav li {
    margin-left: 0;
}

div.application div.editor nav.sidebar ul.nav li a,
div.application div.editor nav.sidebar ul.nav li > em {
	background: none;
    color: var(--gray);
    padding: 3px 7px;
}

div.application div.editor nav.sidebar ul.nav li a.active,
div.application div.editor nav.sidebar ul.nav li a:hover {
	background: none;
    color: inherit;
}

div.application div.editor nav.sidebar ul.nav li a.active {
    color: #ff0080;
}

/* flow blocks */
.edit-area div.flow {
    background: none;
    border: 0;
}

.edit-area div.flow-block {
    margin-bottom: 1em;
    border: 1px solid var(--light-gray);
}

/* flow block type label */
.edit-area div.flow-block h4 {
    background-color: var(--ultra-light-gray);
    padding-bottom: 7px;
}

/* misc */
div.application header ul.breadcrumb li.new-record-crumb a {
    color: var(--accent);
    border: 0;
}

div.application header ul.breadcrumb li:before {
    color: var(--light-gray);
}

.btn-primary {
    background-color: var(--accent-2);
    border-color: var(--accent-2);
}