/**
 * Spectra Image Slider - Masonry Grid Styles
 * Version: 5.0.0
 * Responsive mosaic layout driven by Masonry.js
 */

.sis-masonry-container {
    position: relative;
    width: 100%;
    margin: 0 auto;
    padding: 0;
    box-sizing: border-box;
}

.sis-masonry-grid {
    --sis-columns: 4;
    --sis-gap: 12px;
    position: relative;
    width: 100%;
    margin: 0 auto;
    padding: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sis-masonry-container.is-ready .sis-masonry-grid {
    opacity: 1;
}

.sis-masonry-sizer,
.sis-masonry-item {
    width: calc((100% - (var(--sis-columns) - 1) * var(--sis-gap)) / var(--sis-columns));
}

.sis-masonry-item {
    position: absolute;
    inset: auto;
    overflow: hidden;
    background: #f4f4f4;
    transform: translate3d(0, 20px, 0);
    opacity: 0;
    transition: transform 0.45s ease, opacity 0.45s ease;
    will-change: transform, opacity;
}

.sis-masonry-item.is-visible {
    transform: translate3d(0, 0, 0);
    opacity: 1;
}

.sis-masonry-item-inner {
    width: 100%;
    height: 100%;
    display: block;
}

.sis-masonry-item img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
    transition: transform 0.4s ease;
    cursor: pointer;
}

.sis-masonry-item:hover img {
    transform: scale(1.04);
}

.sis-masonry-item:focus-within img {
    transform: scale(1.02);
}

.sis-masonry-item:hover,
.sis-masonry-item:focus-within {
    z-index: 5;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.sis-masonry-container .sis-preloader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 180px;
    background: rgba(255, 255, 255, 0.95);
    z-index: 20;
    transition: opacity 0.3s ease;
}

.sis-masonry-container.is-ready .sis-preloader {
    opacity: 0;
    pointer-events: none;
}

.sis-masonry-container .sis-preloader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(215, 160, 42, 0.25);
    border-top-color: rgba(215, 160, 42, 0.85);
    border-radius: 50%;
    animation: sis-spin 1s linear infinite;
}

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

@media (max-width: 1199px) {
    .sis-masonry-grid {
        --sis-columns: 3;
    }
}

@media (max-width: 768px) {
    .sis-masonry-grid {
        --sis-columns: 2;
    }
}

@media (max-width: 540px) {
    .sis-masonry-grid {
        --sis-columns: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sis-masonry-grid,
    .sis-masonry-item,
    .sis-masonry-item img,
    .sis-masonry-container .sis-preloader {
        transition: none !important;
        animation: none !important;
    }
}