#workspace {

    display: flex;

    min-height: 70vh;

    border:
        1px solid var(--border);

    border-radius: 8px;

    overflow: hidden;
}

#sidebar {

    width: 320px;

    background: var(--panel);

    border-right:
        1px solid var(--border);
}

.sidebar-header {

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 12px;

    padding: 16px;

    border-bottom:
        1px solid var(--border);
}

.sidebar-header h2 {

    margin: 0;

    font-size: 16px;
}

.sidebar-empty,
.placeholder-panel {

    margin: 16px;

    color: var(--muted);
    line-height: 1.45;
}

.split-controls {

    display: flex;
    flex-direction: column;

    gap: 12px;

    padding: 16px;
}

.split-controls label {

    color: var(--muted);
}

.split-controls select,
.split-controls input,
.split-controls textarea {

    width: 100%;
    padding: 9px 10px;

    border:
        1px solid var(--border);

    border-radius: 8px;

    background: var(--panel-light);
    color: var(--text);

    font: inherit;
}

.split-controls textarea {

    resize: vertical;
}

.file-card {

    display: flex;
    flex-direction: column;

    gap: 10px;

    padding: 12px;

    border:
        1px solid var(--border);

    border-radius: 8px;

    background: var(--panel-light);
}

.file-card .placeholder-panel {

    margin: 0;
}

.file-thumb {

    display: block;

    max-width: 100%;
    height: auto;

    margin: 0 auto;

    border:
        1px solid var(--border);

    border-radius: 4px;

    background: white;
}

.file-thumb[hidden] {

    display: none;
}

.file-order-list {

    display: flex;
    flex-direction: column;

    gap: 10px;

    margin: 0;
    padding: 16px;

    list-style: none;
}

.file-order-item {

    display: flex;
    flex-direction: column;

    gap: 8px;

    padding: 12px;

    border:
        1px solid var(--border);

    border-radius: 8px;

    background: var(--panel-light);
}

.file-order-header {

    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;

    align-items: center;

    gap: 10px;
}

.file-order-header--no-count {

    grid-template-columns: minmax(0, 1fr) auto;
}

.file-name {

    overflow: hidden;

    text-overflow: ellipsis;
    white-space: nowrap;

    min-width: 0;
}

.file-page-count {

    flex: 0 0 auto;

    padding: 2px 8px;

    border: 1px solid var(--border);
    border-radius: 999px;

    background: var(--panel);
    color: var(--text-dim);

    font-size: 11px;
    line-height: 1.4;
    white-space: nowrap;
}

.file-order-controls {

    display: flex;
    flex-wrap: nowrap;

    gap: 4px;
}

.file-order-icon-btn {

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 28px;
    height: 28px;

    padding: 0;

    border: 1px solid var(--border);
    border-radius: 6px;

    background: var(--panel);
    color: var(--text-dim);

    cursor: pointer;

    transition:
        color .15s ease,
        border-color .15s ease,
        background .15s ease,
        transform .15s ease;
}

.file-order-icon-btn:hover:not(:disabled) {

    color: var(--text);
    border-color: var(--accent);
}

.file-order-icon-btn:disabled {

    opacity: .35;
    cursor: not-allowed;
}

.file-order-icon-btn .icon {

    display: block;
}

.file-preview {

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    min-height: 80px;

    padding: 10px;

    border: 1px dashed var(--border);
    border-radius: 6px;

    background: var(--panel);
}

.file-preview[hidden] {

    display: none;
}

.file-preview-canvas {

    max-width: 100%;
    height: auto;

    border: 1px solid var(--border);
    border-radius: 4px;

    background: #fff;
}

.file-preview-status {

    color: var(--text-dim);

    font-size: 12px;
    font-style: italic;
}

.home-panel {

    width: 100%;
    max-width: 760px;

    margin: auto;
    padding: 32px;
}

.home-panel h1 {

    margin: 0 0 8px;
}

.home-panel p {

    margin: 0 0 24px;

    color: var(--muted);
}

.workspace-section {

    padding: 0;

    overflow: hidden;
}

.task-grid {

    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));

    gap: 16px;
}

.task-grid a {

    display: flex;
    align-items: center;
    justify-content: center;

    min-height: 120px;
    padding: 20px;

    border:
        1px solid var(--border);

    border-radius: 8px;

    background: var(--panel);
    color: var(--text);

    text-decoration: none;
}

#viewerContainer {

    flex: 1;

    overflow: auto;

    padding: 32px;
    min-height: 70vh;
}

#viewerContainer {

    flex: 1;

    overflow: auto;

    padding: 32px;

    position: relative;
}

#viewerContainer.drag-active {

    outline:
        3px dashed var(--accent);

    outline-offset: -12px;
}

@media (max-width: 800px) {

    #workspace {
        flex-direction: column;
    }

    #sidebar {
        width: 100%;
        max-height: 42vh;

        overflow: auto;

        border-right: none;
        border-bottom:
            1px solid var(--border);
    }

    #viewerContainer {
        min-height: 60vh;
    }

    .task-grid {
        grid-template-columns: 1fr;
    }
}