/* ========================================
   index オープニング
======================================== */

#indexOpening {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    width: 100%;
    height: 100%;
    background: #ffffff;
    overflow: hidden;
}

#indexOpening.active {
    display: flex;
}

#indexOpeningStart {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #ffffff;
}

#indexOpeningStartButton {
    display: block;
    width: min(78vw, 340px);
    height: auto;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

#indexOpeningStartButton img {
    display: block;
    width: 100%;
    height: auto;
}

#indexOpeningVideo {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: none;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #ffffff;
}

#indexOpening.playing #indexOpeningStart {
    display: none;
}

#indexOpening.playing #indexOpeningVideo {
    display: block;
}

#indexOpeningSkipButton {
    position: absolute;
    right: max(16px, env(safe-area-inset-right));
    bottom: max(16px, env(safe-area-inset-bottom));
    z-index: 3;
    display: none;
    width: min(36vw, 165px);
    height: auto;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

#indexOpeningSkipButton img {
    display: block;
    width: 100%;
    height: auto;
}

#indexOpening.playing #indexOpeningSkipButton {
    display: block;
}

#indexOpeningVolumeButton {
    position: absolute;
    left: max(24px, env(safe-area-inset-left));
    bottom: max(12px, env(safe-area-inset-bottom));
    z-index: 3;
    display: none;
    width: 56px;
    height: 56px;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

#indexOpeningVolumeButton img {
    display: block;
    width: 100%;
    height: 100%;
}

#indexOpening.playing #indexOpeningVolumeButton {
    display: block;
}

#indexOpening.fade-out {
    opacity: 0;
    transition: opacity 0.6s ease;
}