/**
 * Background Slider CSS
 * Fullscreen background slider styles with fade and slide transitions
 */

/* Main slider container - fullscreen, behind all content */
.bg-slider-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

/* Individual slide styling */
.bg-slider-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    will-change: opacity, transform;
}

/* Active slide */
.bg-slider-slide.active {
    opacity: 1;
    z-index: 1;
}

/* Fade transitions */
.bg-slider-slide.fade-in {
    opacity: 1;
    z-index: 2;
}

.bg-slider-slide.fade-out {
    opacity: 0;
    z-index: 1;
}

/* Slide transitions - left to right */
.bg-slider-slide.slide-left {
    animation: slideLeft 1s ease-in-out forwards;
    z-index: 2;
}

.bg-slider-slide.slide-right {
    animation: slideRight 1s ease-in-out forwards;
    z-index: 2;
}

/* Slide left animation keyframes */
@keyframes slideLeft {
    0% {
        transform: translateX(100%);
        opacity: 1;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide right animation keyframes */
@keyframes slideRight {
    0% {
        transform: translateX(-100%);
        opacity: 1;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Previous slide moves out during slide transition */
.bg-slider-slide.slide-out-left {
    animation: slideOutLeft 1s ease-in-out forwards;
    z-index: 1;
}

.bg-slider-slide.slide-out-right {
    animation: slideOutRight 1s ease-in-out forwards;
    z-index: 1;
}

@keyframes slideOutLeft {
    0% {
        transform: translateX(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-100%);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    0% {
        transform: translateX(0);
        opacity: 1;
    }
    100% {
        transform: translateX(100%);
        opacity: 1;
    }
}

/* Ensure content is positioned above slider */
body {
    position: relative;
    z-index: 1;
}

/* Mobile overrides - hide slider on smaller devices */
@media (max-width: 991px) {
    .bg-slider-container {
        display: none;
    }
}

/* Performance optimization - use GPU acceleration */
.bg-slider-slide {
    -webkit-backface-visibility: hidden;
    -webkit-perspective: 1000;
    backface-visibility: hidden;
    perspective: 1000;
}

/* Preloading state - optional loading indicator */
.bg-slider-container.loading {
    background-color: #f0f0f0;
}

.bg-slider-container.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    margin: -25px 0 0 -25px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: rgba(0, 0, 0, 0.3);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Remove loading state when ready */
.bg-slider-container.ready {
    background-color: transparent;
}

.bg-slider-container.ready::after {
    display: none;
}