Source/devtools/front_end/components/customPreviewSection.css

/*
 * Copyright (c) 2015 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

.custom-expandable-section {
    display: inline-flex;
    flex-direction: column;
}

.custom-expandable-section-header::before {
    -webkit-user-select: none;
    background-image: url(Images/toolbarButtonGlyphs.png);
    background-size: 352px 168px;
    opacity: 0.5;
    content: "a";
    width: 8px;
    margin-right: 4px;
    padding-right: 2px;
    color: transparent;
    text-shadow: none;
}

@media (-webkit-min-device-pixel-ratio: 1.5) {
    .custom-expandable-section-header::before {
        background-image: url(Images/toolbarButtonGlyphs_2x.png);
    }
} /* media */


.custom-expandable-section-header::before {
    background-position: -4px -96px;
}

.custom-expandable-section-header.expanded::before {
    background-position: -20px -96px;
}

.custom-expandable-section-standard-section {
    display: inline-flex;
}