.szg-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.szg-grid.columns-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.szg-grid.columns-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.szg-grid.columns-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.szg-grid.columns-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.szg-grid.columns-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.szg-grid.columns-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.szg-item {
    display: block;
    width: 100%;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.szg-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.14);
}

.szg-item img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    display: block;
}

.szg-lightbox {
    position: fixed;
    inset: 0;
    z-index: 99999;
}

.szg-lightbox[hidden] {
    display: none;
}

.szg-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.82);
}

.szg-dialog {
    position: relative;
    z-index: 2;
    width: min(92vw, 1200px);
    height: min(88vh, 900px);
    margin: 6vh auto;
    display: grid;
    grid-template-columns: 64px 1fr 64px;
    align-items: center;
}

.szg-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 20px;
}

.szg-full-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
    background: #fff;
}

.szg-nav,
.szg-close {
    border: 0;
    cursor: pointer;
    color: #fff;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
}

.szg-nav {
    width: 48px;
    height: 48px;
    border-radius: 999px;
    font-size: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.szg-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    font-size: 28px;
    line-height: 1;
    z-index: 3;
}

@media (max-width: 900px) {
    .szg-grid,
    .szg-grid.columns-4,
    .szg-grid.columns-5,
    .szg-grid.columns-6 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .szg-grid,
    .szg-grid.columns-3,
    .szg-grid.columns-4,
    .szg-grid.columns-5,
    .szg-grid.columns-6 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .szg-dialog {
        width: 96vw;
        height: 84vh;
        grid-template-columns: 44px 1fr 44px;
    }

    .szg-nav {
        width: 40px;
        height: 40px;
        font-size: 22px;
    }
}