third_party/devtools/front_end/ui/closeButton.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.
 */

.close-button {
    width: 14px;
    height: 14px;
    cursor: default;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hover-icon, .active-icon {
    display: none;
}

.close-button:hover .default-icon, .close-button:active .default-icon {
    display: none;
}

.close-button:hover .hover-icon {
    display: block;
}

.close-button[data-keyboard-focus="true"]:focus .default-icon, .close-button:active .default-icon {
    display: none;
}

.close-button[data-keyboard-focus="true"]:focus .hover-icon {
    display: block;
}

.close-button:active .hover-icon {
    display: none !important;
}

.close-button:active .active-icon {
    display: block;
}