/*
 * Copyright (C) 2019 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

.color-square {
    position: relative;
}

.color-square > .saturation-gradient {
    background-image: linear-gradient(to right, white, hsla(0, 0%, 100%, 0));
}

.color-square > .lightness-gradient {
    background-image: linear-gradient(to top, black, hsla(0, 0%, 0%, 0));
}

.color-square > .fill {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.color-square > .crosshair {
    position: absolute;
    top: calc(-1 * (var(--crosshair-size) + var(--border-width)) / 2);
    left: calc(-1 * (var(--crosshair-size) + var(--border-width)) / 2);
    width: var(--crosshair-size);
    height: var(--crosshair-size);
    border: var(--border-width) solid white;
    box-shadow: 0 0 2px black;
    border-radius: 3px;
    pointer-events: none;

    --border-width: 1px;
    --crosshair-size: 7px;
}