Source/WebCore/Modules/modern-media-controls/controls/media-controls.css

/*
 * Copyright (C) 2016 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. ``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
 * 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.
 */

:host {
    /* We always want to avoid showing the context menu on iOS. */
    -webkit-touch-callout: none !important;
}

:host(audio) {
    width: 250px;
    height: var(--inline-controls-bar-height);
    min-width: 44px !important;
    min-height: var(--inline-controls-bar-height) !important;
}

* {
    --inline-controls-inside-margin: 6px;
    --fullscreen-controls-bar-height: 75px;
    --primary-glyph-color: rgba(255, 255, 255, 0.75);
    --secondary-glyph-color: rgba(255, 255, 255, 0.55);
    --scrubber-margin: 5px;
}

:host(audio), :host(video.media-document.audio), * {
    --inline-controls-bar-height: 31px;
}

/* We need to use relative positioning due to webkit.org/b/163603 */
.media-controls-container {
    all: initial;
    display: block;
    cursor: inherit;
    visibility: inherit;
    pointer-events: inherit;
    -webkit-cursor-visibility: inherit;
    position: relative;
    will-change: z-index;
}

.media-controls-container,
.media-controls-container > * {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.media-controls-container,
.media-controls-container * {
    -webkit-text-zoom: reset;
    -webkit-text-size-adjust: auto;
    -webkit-font-smoothing: subpixel-antialiased;
}

.media-controls-container > * {
    position: absolute;
}

.media-controls {
    height: 100%;
    font-family: -apple-system;
    white-space: nowrap;
    text-align: initial;
    transform-origin: 0 0;
}

:host(:-webkit-animating-full-screen-transition) .media-controls {
    display: none;
}

.media-controls > * {
    /* We always want to avoid showing the text selection magnifier on iOS. */
    -webkit-user-select: none;
    transition: opacity 0.1s linear;
}

.media-controls.faded > *:not(.placard) {
    opacity: 0;
    pointer-events: none;
    transition-duration: 0.25s;
}

.media-controls > .controls-bar {
    position: absolute;
}

.media-controls.fade-in {
    animation-name: fade-in;
    animation-duration: 350ms;
}

.media-controls .time-label,
.media-controls .status-label {
    color: var(--secondary-glyph-color);
    mix-blend-mode: plus-lighter;
}

@keyframes fade-in {
    from { opacity: 0 }
    to   { opacity: 1 }
}

/* Default support for "Smart Invert" where all content color except media is inverted. */ 
@media (inverted-colors) {
    :host { filter: invert(100%); } /* WebKit native audio and video. */
    picture { filter: none; } /* Don't invert the control buttons. */
}