:root {
    --bg: #000;
    --card-w: min(92vw, 760px);
    --card-h: 72dvh;
    --peek: 58dvh;
    --dur: 320ms;
    --radius: 24px;
    --side-scale: 0.88;
    --far-scale: 0.82;
    --side-blur: 14px;
    --fade-opacity: 0.3;
    --far-opacity: 0.12;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    overflow: hidden;
    font-family: system-ui, sans-serif;
}

.viewer {
    position: relative;
    height: 100dvh;
    overflow: hidden;
    background:
            radial-gradient(circle at center, rgba(255, 255, 255, 0.04), transparent 45%),
            #000;
    touch-action: pan-y;
}

.brand-sticker-wrap {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 30;
    pointer-events: none;
}

.brand-sticker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(0, 0, 0, 0.58);
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.34);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.brand-title {
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    line-height: 1;
}

.brand-emoji {
    display: inline-block;
    font-size: 22px;
    line-height: 1;
    transform-origin: 70% 70%;
    animation:
            emoji-float 2.4s ease-in-out infinite,
            emoji-wiggle 3s ease-in-out infinite;
}

@keyframes emoji-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-4px);
    }
}

@keyframes emoji-wiggle {
    0%,
    100% {
        rotate: 0deg;
    }
    20% {
        rotate: -8deg;
    }
    40% {
        rotate: 8deg;
    }
    60% {
        rotate: -5deg;
    }
    80% {
        rotate: 5deg;
    }
}

.stack {
    position: absolute;
    inset: 0;
    transform: translate3d(0, 0, 0);
    transition: transform var(--dur) cubic-bezier(.22, .61, .36, 1);
    will-change: transform;
    backface-visibility: hidden;
}

.viewer[data-anim="next"] .stack {
    transform: translate3d(0, calc(-1 * var(--peek)), 0);
}

.viewer[data-anim="prev"] .stack {
    transform: translate3d(0, var(--peek), 0);
}

.slide {
    position: absolute;
    left: 50%;
    top: 50%;
    width: var(--card-w);
    height: var(--card-h);
    overflow: hidden;
    border-radius: var(--radius);
    background: #070707;
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.55);
    transition:
            transform var(--dur) cubic-bezier(.22, .61, .36, 1),
            opacity var(--dur) ease,
            filter var(--dur) ease;
    will-change: transform, opacity, filter;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    contain: layout paint style;
}

.far-prev {
    transform: translate3d(-50%, calc(-50% - (var(--peek) * 2)), 0) scale(var(--far-scale));
    opacity: var(--far-opacity);
    filter: blur(var(--side-blur));
    z-index: 0;
}

.prev {
    transform: translate3d(-50%, calc(-50% - var(--peek)), 0) scale(var(--side-scale));
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    z-index: 1;
}

.current {
    transform: translate3d(-50%, -50%, 0) scale(1);
    opacity: 1;
    filter: blur(0);
    z-index: 2;
}

.next {
    transform: translate3d(-50%, calc(-50% + var(--peek)), 0) scale(var(--side-scale));
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    z-index: 1;
}

.far-next {
    transform: translate3d(-50%, calc(-50% + (var(--peek) * 2)), 0) scale(var(--far-scale));
    opacity: var(--far-opacity);
    filter: blur(var(--side-blur));
    z-index: 0;
}

.viewer[data-anim="next"] .far-prev {
    opacity: 0;
}

.viewer[data-anim="next"] .prev {
    opacity: var(--far-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, calc(-50% - var(--peek)), 0) scale(var(--far-scale));
}

.viewer[data-anim="next"] .current {
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, -50%, 0) scale(var(--side-scale));
}

.viewer[data-anim="next"] .next {
    opacity: 1;
    filter: blur(0);
    transform: translate3d(-50%, calc(-50% + var(--peek)), 0) scale(1);
}

.viewer[data-anim="next"] .far-next {
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, calc(-50% + (var(--peek) * 2)), 0) scale(var(--side-scale));
}

.viewer[data-anim="prev"] .far-next {
    opacity: 0;
}

.viewer[data-anim="prev"] .next {
    opacity: var(--far-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, calc(-50% + var(--peek)), 0) scale(var(--far-scale));
}

.viewer[data-anim="prev"] .current {
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, -50%, 0) scale(var(--side-scale));
}

.viewer[data-anim="prev"] .prev {
    opacity: 1;
    filter: blur(0);
    transform: translate3d(-50%, calc(-50% - var(--peek)), 0) scale(1);
}

.viewer[data-anim="prev"] .far-prev {
    opacity: var(--fade-opacity);
    filter: blur(var(--side-blur));
    transform: translate3d(-50%, calc(-50% - (var(--peek) * 2)), 0) scale(var(--side-scale));
}

.media-frame {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: inherit;
    background: #000;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.media-frame > img,
.media-frame > video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    object-position: center center;
    background: #000;
    user-select: none;
    -webkit-user-drag: none;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.media-frame > img {
    transform:
            translate3d(var(--pan-x, 0px), var(--pan-y, 0px), 0)
            scale(var(--zoom, 1));
    transform-origin: center center;
    transition: transform 140ms ease;
}

.media-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    z-index: 4;
    pointer-events: none;
    opacity: 1;
    transition: opacity 180ms ease;
}

.media-loader.is-hidden {
    opacity: 0;
}

.media-loader.is-error {
    opacity: 1;
}

.video-audio-toggle {
    position: absolute;
    right: 16px;
    bottom: 16px;
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.95);
    outline: 2px solid rgba(0, 0, 0, 0.35);
    outline-offset: 0;
    border-radius: 999px;
    padding: 0;
    background: rgba(0, 0, 0, 0.72);
    color: #fff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    z-index: 5;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, outline-color 180ms ease;
}

.video-audio-toggle:hover {
    background: rgba(0, 0, 0, 0.82);
}

.current.dragging .media-frame > img {
    transition: none;
}

.viewer.is-zoomed .current .media-frame > img {
    width: 100vw;
    height: 100dvh;
    object-fit: contain;
}

.viewer.is-zoomed .current.dragging .media-frame > img {
    cursor: grabbing;
}

.viewer.is-zoomed .current {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    border-radius: 0;
    transform: none !important;
    z-index: 50;
    background: #000;
    filter: none !important;
}

.viewer::before,
.viewer::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 14dvh;
    pointer-events: none;
    z-index: 5;
}

.viewer::before {
    top: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0));
}

.viewer::after {
    bottom: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0));
}

@media (max-width: 700px) {
    :root {
        --card-w: 94vw;
        --card-h: 68dvh;
        --peek: 54dvh;
        --radius: 18px;
    }

    .brand-sticker-wrap {
        top: 14px;
    }

    .brand-sticker {
        padding: 10px 14px;
        gap: 8px;
    }

    .brand-title {
        font-size: 15px;
    }

    .brand-emoji {
        font-size: 19px;
    }
}