* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #000; }

#player {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: #000;
}

#bgCanvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#slideContainer {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

#slideContainer img {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    max-width: 100%;
    max-height: 100%;
    opacity: 0;
    transition: opacity 0s;
    will-change: opacity, transform;
}

#slideContainer img.active {
    opacity: 1;
}

#slideContainer img.fit-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    max-width: none;
    max-height: none;
}

#slideContainer img.fit-contain {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

#overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    user-select: none;
    pointer-events: none;
}
#clock { pointer-events: none; position: absolute; bottom: 2rem; right: 2rem; }
.nav-arrow, .nav-counter { pointer-events: auto; }

#clock {
    text-align: right;
    color: #fff;
    text-shadow: 0 0 20px rgba(0,0,0,.7), 0 2px 8px rgba(0,0,0,.5);
    font-family: 'Courier New', Courier, monospace;
    line-height: 1;
}

#dateDisplay {
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: .05em;
    margin-bottom: .2rem;
    opacity: .85;
}

#timeDisplay {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: .08em;
    font-variant-numeric: tabular-nums;
}

@media (max-width: 768px) {
    #dateDisplay { font-size: .75rem; }
    #timeDisplay { font-size: 1.5rem; }
}

#loading {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    color: #666;
    font-family: sans-serif;
    font-size: 1.2rem;
}

.overlay-el.hidden { display: none !important; }

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 15;
    width: 54px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    user-select: none;
    background: rgba(0,0,0,.35);
    border-radius: 8px;
    opacity: 0;
    transition: opacity .3s, background .3s;
}
.nav-arrow:hover { background: rgba(0,0,0,.55); }
#player:hover .nav-arrow { opacity: 1; }
.nav-arrow-left { left: .75rem; }
.nav-arrow-right { right: .75rem; }

.nav-counter {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    color: rgba(255,255,255,.7);
    font-family: sans-serif;
    font-size: .85rem;
    text-shadow: 0 0 12px rgba(0,0,0,.8);
    background: rgba(0,0,0,.3);
    padding: .25rem .75rem;
    border-radius: 12px;
    letter-spacing: .05em;
}

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 15;
    width: 54px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    user-select: none;
    background: rgba(0,0,0,.35);
    border-radius: 8px;
    opacity: 0;
    transition: opacity .3s, background .3s;
}
.nav-arrow:hover { background: rgba(0,0,0,.55); }
#player:hover .nav-arrow,
.nav-arrow.visible { opacity: 1; }
.nav-arrow-left { left: .75rem; }
.nav-arrow-right { right: .75rem; }

.nav-counter {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    color: rgba(255,255,255,.7);
    font-family: sans-serif;
    font-size: .85rem;
    text-shadow: 0 0 12px rgba(0,0,0,.8);
    background: rgba(0,0,0,.3);
    padding: .25rem .75rem;
    border-radius: 12px;
    letter-spacing: .05em;
}

/* Video / YouTube slides */
#slideContainer video.video-slide,
#slideContainer .yt-slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    transition: opacity 0s;
    will-change: opacity;
    background: #000;
    z-index: 5;
}
#slideContainer video.video-slide.active,
#slideContainer .yt-slide.active {
    opacity: 1;
}
#slideContainer video.video-slide.fit-cover {
    object-fit: cover;
}
#slideContainer video.video-slide.fit-contain {
    object-fit: contain;
    background: #000;
}
#slideContainer .yt-slide iframe {
    width: 100%; height: 100%;
    border: 0;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
}

/* Transition states */
#slideContainer img.sliding-out {
    transition: opacity .8s ease, transform .8s ease;
}
#slideContainer img.sliding-in {
    transition: opacity .8s ease, transform .8s ease;
}

/* Fade */
.fade-out { opacity: 0 !important; }
.fade-in { opacity: 1 !important; }

/* Slide */
.slide-left-out { transform: translate(-150%, -50%) !important; opacity: 0 !important; }
.slide-left-in { transform: translate(-50%, -50%) !important; opacity: 1 !important; }

/* Zoom */
.zoom-out { transform: translate(-50%, -50%) scale(1.1) !important; opacity: 0 !important; }
.zoom-in { transform: translate(-50%, -50%) scale(1) !important; opacity: 1 !important; }

/* Cross dissolve handled by simultaneous fade */