body {
    margin: 0;
    background: black;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}


#projector {
    position: absolute; 
    width: 1920px;
    height: 1080px;
    overflow: hidden;
    transform-origin: top left; 
}



#projector-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}


#slide-container {
    position: absolute;
    left: 320px;
    top: 170px;
    width: 750px;
    height: 680px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    mix-blend-mode: multiply;
    -webkit-transform: perspective(100px) rotatey(1deg);
    position: relative;
    z-index: 1;
}


#slide-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}


.nav-btn {
    position: absolute;
    cursor: pointer;
    user-select: none;
}


#btn-prev {
    left: 174px;
    top: 462px;
    width: 104px;
    height: 121px;
    mix-blend-mode: soft-light;
}


#btn-next {
    left: 1058px;
    top: 475px;
    width: 81px;
    height: 95px;
    mix-blend-mode: soft-light;
}

#slide-img {
    opacity: 1;
    transition: opacity 0.4s ease-in-out;
}

#slide-img.fading-out {
    opacity: 0;
}

#slide-img.flicker {
    animation: flicker 0.15s linear 2;
}

#dust-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2; 
    pointer-events: none;
}

@keyframes flicker {
    0% { opacity: 0.9; }
    50% { opacity: 0.8; }
    100% { opacity: 1; }
}