.viewer-layout {
    display: grid;
    gap: 1.5rem;
    align-items: stretch;
}

@media (min-width: 960px) {
    .viewer-layout {
        grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
        align-items: stretch;
    }
}

.viewer-drop-pane {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
}

.viewer-drop-pane .drop-zone {
    margin: 0;
    flex: 0 0 auto;
}

.viewer-drop-pane .drop-zone.is-dragover {
    border-color: var(--color-accent-fg);
    background: var(--color-canvas-inset);
}

.viewer-file-panel {
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-subtle);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1 1 auto;
    min-height: 0;
}

.viewer-file-panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

#fileCount {
    font-size: 0.85rem;
    color: var(--color-fg-muted);
}

.viewer-file-list {
    list-style: none;
    margin: 0;
    padding: 0.25rem;
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-subtle);
}

.viewer-file-row {
    position: relative;
    z-index: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid var(--color-border-muted);
}

.viewer-file-row.active {
    background: rgba(9, 105, 218, 0.06);
    border-left: 3px solid var(--color-accent-fg);
    padding-left: calc(0.75rem - 3px);
}

.viewer-file-button {
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    align-items: flex-start;
    text-align: left;
    cursor: pointer;
    transition: border 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    font-size: 0.95rem;
    color: var(--color-fg-default);
    flex: 1 1 auto;
}

.viewer-file-row:last-child {
    border-bottom: none;
}

.viewer-file-card {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    text-align: left;
}

.viewer-file-heading {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.35rem;
}

.viewer-file-delete {
    flex: 0 0 auto;
    border: none;
    background: rgba(207, 34, 46, 0.12);
    color: #b42318;
    border-radius: 3px;
    width: 18px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid rgba(207, 34, 46, 0.45);
    padding: 0;
}

.viewer-file-delete:hover, .viewer-file-delete:focus-visible {
    background: rgba(207, 34, 46, 0.25);
    color: #8f1d13;
    box-shadow: none;
}

.viewer-file-delete-icon {
    width: 12px;
    height: 12px;
    display: block;
}

.viewer-file-delete-icon path {
    fill: currentColor;
}

.viewer-file-delete span {
    line-height: 1;
}

.viewer-file-empty {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-fg-muted);
    padding: 0.85rem;
    border: 1px dashed var(--color-border-muted);
    border-radius: var(--radius-md);
}

.viewer-file-button:hover, .viewer-file-button:focus-visible {
    background: transparent;
    outline: none;
}

.viewer-file-name {
    font-weight: 600;
    width: calc(100% - 1.5rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.viewer-file-meta {
    font-size: 0.85rem;
    color: var(--color-fg-muted);
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.viewer-file-chip {
    background: rgba(15, 23, 42, 0.07);
    border-radius: 999px;
    padding: 0.1rem 0.55rem;
    font-size: 0.78rem;
    line-height: 1.3;
}

.viewer-file-type-chip {
    background: rgba(9, 105, 218, 0.12);
    color: var(--color-accent-fg);
    font-weight: 600;
}

.viewer-file-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    background: rgba(9, 105, 218, 0.1);
    color: var(--color-accent-fg);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.viewer-preview-pane {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.viewer-export-portal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.viewer-export-portal.hidden {
    display: none;
}

.viewer-export-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
    z-index: 0;
}

.viewer-export-dialog {
    position: relative;
    background: var(--color-canvas-subtle);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-default);
    box-shadow: 0 24px 55px rgba(15, 23, 42, 0.25);
    width: min(950px, 95vw);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    z-index: 1;
}

.viewer-export-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border-default);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.viewer-export-close {
    font-size: 1.1rem;
    padding: 0.2rem 0.6rem;
    line-height: 1;
}

.viewer-export-page-heading {
    flex-wrap: wrap;
}

.viewer-export-page-body {
    display: grid;
    gap: 1.25rem;
}

@media (min-width: 960px) {
    .viewer-export-page-body {
        grid-template-columns: minmax(0, 1.35fr) minmax(280px, 1fr);
        align-items: start;
    }
}

.viewer-modal-card {
    flex: 1 1 50%;
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-subtle);
    padding: 1rem 1.1rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.viewer-modal-card-heading {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.viewer-modal-card-heading h4 {
    margin: 0;
    font-size: 0.95rem;
}

.viewer-export-selection {
    gap: 0.85rem;
}

.viewer-export-list-shell {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.viewer-export-list-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 160px;
    gap: 0.5rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-fg-muted);
    padding: 0 0.3rem;
}

.viewer-export-file-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-subtle);
    max-height: min(360px, 55vh);
    overflow-y: auto;
}

.viewer-export-file-row {
    border-bottom: 1px solid var(--color-border-muted);
    padding: 0.65rem 0.85rem;
}

.viewer-export-file-row:last-child {
    border-bottom: none;
}

.viewer-export-checkbox {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.viewer-export-checkbox input[type="checkbox"] {
    margin-top: 0;
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

.viewer-export-file-details {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 160px;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}

.viewer-export-file-name {
    font-weight: 600;
    color: var(--color-fg-default);
}

.viewer-export-file-meta {
    font-size: 0.85rem;
    color: var(--color-fg-muted);
}

.viewer-export-file-meta-tags {
    display: block;
    font-size: 0.85rem;
    color: var(--color-fg-muted);
    text-align: right;
}

.viewer-export-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    background: rgba(9, 105, 218, 0.1);
    color: var(--color-accent-fg);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.viewer-export-empty {
    padding: 1rem;
    text-align: center;
    color: var(--color-fg-muted);
    font-size: 0.9rem;
}

.viewer-export-controls {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.viewer-export-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.viewer-export-preset {
    border: 1px solid var(--color-border-default);
    background: var(--color-canvas-default);
    color: var(--color-fg-default);
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: border 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.viewer-export-preset:hover, .viewer-export-preset:focus-visible {
    border-color: var(--color-accent-fg);
    color: var(--color-accent-fg);
    outline: none;
}

.viewer-export-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.viewer-selection-controls {
    border-bottom: 1px solid var(--color-border-muted);
    padding-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.viewer-selection-count {
    margin: 0;
    color: var(--color-fg-muted);
    font-size: 0.85rem;
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}



@media (max-width: 600px) {
    .viewer-selection-controls {
        flex-direction: column;
        align-items: flex-start;
    }
}

.viewer-export-label {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-weight: 600;
    color: transparent;
    font-size: 0;
}

.viewer-export-input {
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    font-size: 0.95rem;
    font-family: var(--font-stack);
    background: var(--color-canvas-subtle);
    color: var(--color-fg-default);
    width: 100%;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.viewer-export-input:focus-visible {
    border-color: var(--color-accent-fg);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.15);
    outline: none;
}

.viewer-export-hint {
    font-size: 0.8rem;
    color: var(--color-fg-muted);
    margin: 0;
}

body.viewer-modal-open, html.viewer-modal-open {
    overflow: hidden;
}

.preview-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: flex-start;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border-muted);
    padding-bottom: 0.5rem;
}

.preview-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.preview-shell {
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-subtle);
    min-height: 520px;
    overflow: hidden;
}

.viewer-editor {
    width: 100%;
    border: none;
    background: transparent;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-fg-default);
    padding: 1.25rem;
    min-height: 520px;
    line-height: 1.6;
    resize: vertical;
    white-space: pre-wrap;
    word-break: break-word;
    outline: none;
}

.viewer-editor:disabled {
    color: var(--color-fg-muted);
}

.viewer-editor.viewer-editor-empty {
    color: var(--color-fg-muted);
}

@media (max-width: 960px) {
    .viewer-layout {
        grid-template-columns: 1fr;
    }

    .viewer-file-panel {
        max-height: 300px;
    }
}

@media (max-width: 640px) {
    .preview-header {
        flex-direction: column;
        align-items: stretch;
    }

    .preview-actions {
        width: 100%;
        flex-direction: column;
    }

    .preview-actions button {
        width: 100%;
    }

    .viewer-export-dialog {
        width: 100%;
        max-height: 100vh;
        border-radius: 0;
    }

    .viewer-export-portal {
        padding: 0;
    }

    .viewer-export-header {
        padding: 0.85rem 1rem;
    }

    .viewer-export-list-head {
        grid-template-columns: minmax(0, 1fr) 100px;
    }

    .viewer-export-file-details {
        grid-template-columns: minmax(0, 1fr) 100px;
    }

    .viewer-export-actions {
        flex-direction: column;
    }

    .viewer-export-actions button {
        width: 100%;
    }

    .viewer-selection-controls {
        flex-direction: column;
        align-items: stretch;
    }
}