.file-preview-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
    .file-preview-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1200px) {
    .file-preview-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.file-preview-grid > div {
    position: relative;
    border: 1px solid var(--mud-palette-lines-default);
    padding: 0.5rem;
    background: var(--mud-palette-background);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--mud-palette-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px 0;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.file-preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

    .file-preview-modal > div {
        position: relative;
        max-width: 80vw;
        max-height: 80vh;
    }

    .file-preview-modal img {
        max-width: 80vw;
        max-height: 80vh;
        width: auto;
        height: auto;
        border-radius: 8px;
    }

    .file-preview-modal button.close-btn {
        position: absolute;
        top: 5px;
        right: 5px;
        background: var(--mud-palette-surface);
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        border-radius: 50%;
        width: 32px;
        height: 32px;
    }


.file-preview-grid > div button.delete-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--mud-palette-surface);
    border: none;
    cursor: pointer;
    border-radius: 4px;
    font-size: 1.1rem;
    padding: 2px 6px;
}

.zoom-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: hsla(0, 0%, 100%, 0.8);
    background: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    padding: 8px;
    transition: color 0.3s ease;
    pointer-events: auto;
    opacity: 0.8;
    z-index: 10;
}

    .zoom-icon:hover {
        color: #fff;
        opacity: 1;
    }


.preview-wrapper {
    position: relative;
    width: 100%;
}

.file-preview-modal-content {
    max-width: 80vw;
    max-height: 80vh;
    position: relative;
}

.preview-img {
    max-height: 300px;
    width: auto;
    object-fit: contain;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.2s ease-in-out;
}

.file-preview-grid > div .select-checkbox {
    position: absolute;
    top: 5px;
    left: 5px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.file-preview-grid > div.is-selected,
.file-preview-item:has(.select-checkbox:checked) {
    outline: 2px solid var(--mud-palette-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.03) inset;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
}

.file-drop-zone {
    border: 2px dashed rgba(0,0,0,.2);
    border-radius: 10px;
    transition: background .12s ease, border-color .12s ease, box-shadow .12s ease;
}

.file-drop-zone.is-dragover {
    box-shadow: 0 0 0 4px rgba(0,0,0,.06);
}

.file-drop-zone.is-dragover-valid {
    border-color: color-mix(in srgb, var(--mud-palette-success) 90%, transparent);
    background: color-mix(in srgb, var(--mud-palette-success) 20%, transparent);
}

.file-drop-zone.is-dragover-invalid {
    border-color: color-mix(in srgb, var(--mud-palette-error) 90%, transparent);
    background: color-mix(in srgb, var(--mud-palette-error) 20%, transparent);
}

.file-drop-zone.is-dragover-unknown {
    border-color: rgba(25, 118, 210, .9);
    background: rgba(25, 118, 210, .05);
}