.lexa-pdfmerge {
    /* Scoped CSS variables (Lexa palette) */
    --pdfm-primary: #0d9488;
    --pdfm-primary-dark: #0f766e;
    --pdfm-primary-light: #14b8a6;
    --pdfm-primary-soft: #ccfbf1;
    --pdfm-primary-softer: #f0fdfa;
    --pdfm-accent: #f59e0b;
    --pdfm-accent-soft: #fef3c7;
    --pdfm-text: #1e293b;
    --pdfm-text-soft: #64748b;
    --pdfm-text-muted: #94a3b8;
    --pdfm-bg: #f8fafc;
    --pdfm-paper: #ffffff;
    --pdfm-line: #e2e8f0;
    --pdfm-line-soft: #f1f5f9;
    --pdfm-line-strong: #cbd5e1;
    --pdfm-danger: #ef4444;
    --pdfm-danger-soft: #fee2e2;
    --pdfm-success: #10b981;
    --pdfm-success-soft: #d1fae5;
    --pdfm-warning: #f59e0b;

    --pdfm-radius-sm: 6px;
    --pdfm-radius: 10px;
    --pdfm-radius-lg: 14px;
    --pdfm-radius-xl: 20px;

    --pdfm-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --pdfm-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
    --pdfm-shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.10);
    --pdfm-shadow-xl: 0 20px 50px rgba(15, 23, 42, 0.15);

    --pdfm-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    display: block;
    max-width: 100%;
    margin: 0 auto;
    color: var(--pdfm-text);
    line-height: 1.55;
    position: relative;
}

/* Inherit font from host page, but make sure children pick it up */
.lexa-pdfmerge,
.lexa-pdfmerge * {
    box-sizing: border-box;
}

.lexa-pdfmerge input,
.lexa-pdfmerge button,
.lexa-pdfmerge select,
.lexa-pdfmerge textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* ==========================================================================
   Header
   ========================================================================== */
.lexa-pdfmerge .pdfm-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.lexa-pdfmerge .pdfm-header-text {
    flex: 1;
    min-width: 0;
}

.lexa-pdfmerge .pdfm-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--pdfm-text);
    margin: 0 0 6px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.lexa-pdfmerge .pdfm-subtitle {
    font-size: 1rem;
    color: var(--pdfm-text-soft);
    margin: 0;
}

.lexa-pdfmerge .pdfm-privacy {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--pdfm-primary-softer);
    color: var(--pdfm-primary-dark);
    padding: 8px 14px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--pdfm-primary-soft);
    white-space: nowrap;
}

.lexa-pdfmerge .pdfm-privacy-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* ==========================================================================
   Dropzone (empty state)
   ========================================================================== */
.lexa-pdfmerge .pdfm-dropzone {
    position: relative;
    background: var(--pdfm-paper);
    border: 2px dashed var(--pdfm-line-strong);
    border-radius: var(--pdfm-radius-xl);
    padding: 64px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--pdfm-transition);
    overflow: hidden;
}

.lexa-pdfmerge .pdfm-dropzone::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
            radial-gradient(circle at 20% 30%, rgba(13, 148, 136, 0.04) 0%, transparent 50%),
            radial-gradient(circle at 80% 70%, rgba(245, 158, 11, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.lexa-pdfmerge .pdfm-dropzone:hover,
.lexa-pdfmerge .pdfm-dropzone.is-dragover {
    border-color: var(--pdfm-primary);
    background: var(--pdfm-primary-softer);
    transform: translateY(-1px);
    box-shadow: var(--pdfm-shadow);
}

.lexa-pdfmerge .pdfm-dropzone.is-dragover {
    border-style: solid;
    transform: scale(1.005);
}

.lexa-pdfmerge .pdfm-file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.lexa-pdfmerge .pdfm-dropzone-inner {
    position: relative;
    pointer-events: none;
}

.lexa-pdfmerge .pdfm-dropzone-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 18px;
    background: var(--pdfm-primary-soft);
    color: var(--pdfm-primary-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-dropzone:hover .pdfm-dropzone-icon,
.lexa-pdfmerge .pdfm-dropzone.is-dragover .pdfm-dropzone-icon {
    transform: scale(1.08) translateY(-2px);
}

.lexa-pdfmerge .pdfm-dropzone-icon svg {
    width: 36px;
    height: 36px;
}

.lexa-pdfmerge .pdfm-dropzone-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--pdfm-text);
    margin: 0 0 8px;
}

.lexa-pdfmerge .pdfm-dropzone-subtitle {
    font-size: 1rem;
    color: var(--pdfm-text-soft);
    margin: 0 0 4px;
}

.lexa-pdfmerge .pdfm-link {
    color: var(--pdfm-primary);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: var(--pdfm-primary-soft);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

.lexa-pdfmerge .pdfm-dropzone-hint {
    font-size: 0.875rem;
    color: var(--pdfm-text-muted);
    margin: 8px 0 0;
}

/* ==========================================================================
   Workspace
   ========================================================================== */
.lexa-pdfmerge .pdfm-workspace {
    animation: pdfmFadeIn 0.3s ease-out;
}

/* ==========================================================================
   Toolbar
   ========================================================================== */
.lexa-pdfmerge .pdfm-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 12px 16px;
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius);
    margin-bottom: 16px;
    box-shadow: var(--pdfm-shadow-sm);
}

.lexa-pdfmerge .pdfm-toolbar-left {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

/* View toggle */
.lexa-pdfmerge .pdfm-view-toggle {
    display: inline-flex;
    background: var(--pdfm-bg);
    border-radius: var(--pdfm-radius-sm);
    padding: 3px;
    border: 1px solid var(--pdfm-line);
}

.lexa-pdfmerge .pdfm-view-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--pdfm-text-soft);
    background: transparent;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-view-btn svg {
    width: 16px;
    height: 16px;
}

.lexa-pdfmerge .pdfm-view-btn:hover {
    color: var(--pdfm-text);
}

.lexa-pdfmerge .pdfm-view-btn.is-active {
    background: var(--pdfm-paper);
    color: var(--pdfm-primary-dark);
    box-shadow: var(--pdfm-shadow-sm);
}

/* Stats */
.lexa-pdfmerge .pdfm-stats {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--pdfm-text-soft);
    font-size: 0.875rem;
}

.lexa-pdfmerge .pdfm-stats strong {
    color: var(--pdfm-text);
    font-weight: 700;
}

.lexa-pdfmerge .pdfm-stat-sep {
    color: var(--pdfm-text-muted);
}

/* ==========================================================================
   View panels
   ========================================================================== */
.lexa-pdfmerge .pdfm-view-panel {
    margin-bottom: 20px;
}

/* ==========================================================================
   Files list & file items
   ========================================================================== */
.lexa-pdfmerge .pdfm-files-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lexa-pdfmerge .pdfm-file-item {
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius);
    overflow: hidden;
    transition: box-shadow var(--pdfm-transition), border-color var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-file-item:hover {
    border-color: var(--pdfm-line-strong);
    box-shadow: var(--pdfm-shadow);
}

.lexa-pdfmerge .pdfm-file-item.is-loading {
    opacity: 0.7;
}

.lexa-pdfmerge .pdfm-file-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
}

.lexa-pdfmerge .pdfm-drag-handle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 32px;
    color: var(--pdfm-text-muted);
    background: transparent;
    border: none;
    cursor: grab;
    border-radius: var(--pdfm-radius-sm);
    transition: all var(--pdfm-transition);
    flex-shrink: 0;
}

.lexa-pdfmerge .pdfm-drag-handle:hover {
    background: var(--pdfm-line-soft);
    color: var(--pdfm-text-soft);
}

.lexa-pdfmerge .pdfm-drag-handle:active {
    cursor: grabbing;
}

.lexa-pdfmerge .pdfm-drag-handle svg {
    width: 18px;
    height: 18px;
}

.lexa-pdfmerge .pdfm-file-icon {
    width: 38px;
    height: 38px;
    background: var(--pdfm-primary-softer);
    color: var(--pdfm-primary-dark);
    border-radius: var(--pdfm-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lexa-pdfmerge .pdfm-file-icon svg {
    width: 20px;
    height: 20px;
}

.lexa-pdfmerge .pdfm-file-info {
    flex: 1;
    min-width: 0;
}

.lexa-pdfmerge .pdfm-file-name {
    font-weight: 600;
    color: var(--pdfm-text);
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 2px;
}

.lexa-pdfmerge .pdfm-file-meta {
    font-size: 0.8125rem;
    color: var(--pdfm-text-soft);
    display: flex;
    gap: 6px;
    align-items: center;
}

.lexa-pdfmerge .pdfm-file-meta-sep {
    color: var(--pdfm-text-muted);
}

.lexa-pdfmerge .pdfm-file-meta-included {
    color: var(--pdfm-primary-dark);
    font-weight: 600;
}

.lexa-pdfmerge .pdfm-file-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.lexa-pdfmerge .pdfm-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: transparent;
    color: var(--pdfm-text-soft);
    border: 1px solid transparent;
    border-radius: var(--pdfm-radius-sm);
    cursor: pointer;
    transition: all var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-icon-btn:hover {
    background: var(--pdfm-line-soft);
    color: var(--pdfm-text);
    border-color: var(--pdfm-line);
}

.lexa-pdfmerge .pdfm-icon-btn.is-danger:hover {
    background: var(--pdfm-danger-soft);
    color: var(--pdfm-danger);
    border-color: var(--pdfm-danger-soft);
}

.lexa-pdfmerge .pdfm-icon-btn svg {
    width: 17px;
    height: 17px;
}

.lexa-pdfmerge .pdfm-expand-btn svg {
    transition: transform var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-file-item.is-expanded .pdfm-expand-btn svg {
    transform: rotate(180deg);
}

/* Pages strip (inside file item) */
.lexa-pdfmerge .pdfm-pages-strip {
    display: none;
    padding: 0 14px 14px;
    border-top: 1px solid var(--pdfm-line-soft);
    background: var(--pdfm-bg);
}

.lexa-pdfmerge .pdfm-file-item.is-expanded .pdfm-pages-strip {
    display: block;
    animation: pdfmSlideDown 0.25s ease-out;
}

.lexa-pdfmerge .pdfm-pages-strip-inner {
    display: flex;
    gap: 10px;
    padding: 14px 0 4px;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--pdfm-line-strong) transparent;
}

.lexa-pdfmerge .pdfm-pages-strip-inner::-webkit-scrollbar {
    height: 6px;
}

.lexa-pdfmerge .pdfm-pages-strip-inner::-webkit-scrollbar-track {
    background: transparent;
}

.lexa-pdfmerge .pdfm-pages-strip-inner::-webkit-scrollbar-thumb {
    background: var(--pdfm-line-strong);
    border-radius: 10px;
}

/* ==========================================================================
   Page thumbnails
   ========================================================================== */
.lexa-pdfmerge .pdfm-page-thumb {
    position: relative;
    flex-shrink: 0;
    width: 110px;
    background: var(--pdfm-paper);
    border: 2px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius-sm);
    overflow: hidden;
    cursor: grab;
    transition: all var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-page-thumb:hover {
    border-color: var(--pdfm-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--pdfm-shadow);
}

.lexa-pdfmerge .pdfm-page-thumb:active {
    cursor: grabbing;
}

.lexa-pdfmerge .pdfm-page-thumb.is-excluded {
    opacity: 0.4;
    border-style: dashed;
}

.lexa-pdfmerge .pdfm-page-thumb.is-excluded .pdfm-page-image {
    filter: grayscale(0.8);
}

.lexa-pdfmerge .pdfm-page-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1.414;
    background: var(--pdfm-line-soft);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lexa-pdfmerge .pdfm-page-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform 0.3s ease;
}

.lexa-pdfmerge .pdfm-page-image.is-loading {
    background: linear-gradient(90deg, var(--pdfm-line-soft) 0%, var(--pdfm-line) 50%, var(--pdfm-line-soft) 100%);
    background-size: 200% 100%;
    animation: pdfmShimmer 1.4s ease-in-out infinite;
}

.lexa-pdfmerge .pdfm-page-image.is-loading img {
    opacity: 0;
}

/* Rotation classes */
.lexa-pdfmerge .pdfm-page-image[data-rotation="90"] img { transform: rotate(90deg); }
.lexa-pdfmerge .pdfm-page-image[data-rotation="180"] img { transform: rotate(180deg); }
.lexa-pdfmerge .pdfm-page-image[data-rotation="270"] img { transform: rotate(270deg); }

.lexa-pdfmerge .pdfm-page-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.7) 0%, transparent 40%);
    opacity: 0;
    transition: opacity var(--pdfm-transition);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 8px;
    pointer-events: none;
}

.lexa-pdfmerge .pdfm-page-thumb:hover .pdfm-page-overlay {
    opacity: 1;
}

.lexa-pdfmerge .pdfm-page-controls {
    display: flex;
    gap: 4px;
    pointer-events: auto;
}

.lexa-pdfmerge .pdfm-page-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--pdfm-text);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--pdfm-transition);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.lexa-pdfmerge .pdfm-page-btn:hover {
    background: var(--pdfm-primary);
    color: white;
    transform: scale(1.08);
}

.lexa-pdfmerge .pdfm-page-btn.is-danger:hover {
    background: var(--pdfm-danger);
}

.lexa-pdfmerge .pdfm-page-btn svg {
    width: 13px;
    height: 13px;
}

.lexa-pdfmerge .pdfm-page-label {
    padding: 5px 8px;
    font-size: 0.75rem;
    color: var(--pdfm-text-soft);
    background: var(--pdfm-paper);
    text-align: center;
    border-top: 1px solid var(--pdfm-line-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.lexa-pdfmerge .pdfm-page-num {
    font-weight: 600;
    color: var(--pdfm-text);
}

.lexa-pdfmerge .pdfm-page-source {
    font-size: 0.6875rem;
    color: var(--pdfm-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

/* ==========================================================================
   Pages grid (page view)
   ========================================================================== */
.lexa-pdfmerge .pdfm-pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 14px;
    padding: 18px;
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius);
    min-height: 200px;
    box-shadow: var(--pdfm-shadow-sm);
}

.lexa-pdfmerge .pdfm-pages-grid .pdfm-page-thumb {
    width: 100%;
}

.lexa-pdfmerge .pdfm-pages-grid .pdfm-page-source {
    display: block;
    margin-top: 2px;
}

/* ==========================================================================
   Settings sections (details / summary)
   ========================================================================== */
.lexa-pdfmerge .pdfm-settings {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.lexa-pdfmerge .pdfm-section {
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius);
    overflow: hidden;
    box-shadow: var(--pdfm-shadow-sm);
}

.lexa-pdfmerge .pdfm-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    font-weight: 600;
    color: var(--pdfm-text);
    transition: background var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-section-header::-webkit-details-marker {
    display: none;
}

.lexa-pdfmerge .pdfm-section-header:hover {
    background: var(--pdfm-bg);
}

.lexa-pdfmerge .pdfm-section-title {
    font-size: 1rem;
}

.lexa-pdfmerge .pdfm-chevron {
    width: 18px;
    height: 18px;
    color: var(--pdfm-text-soft);
    transition: transform var(--pdfm-transition);
}

.lexa-pdfmerge .pdfm-section[open] .pdfm-chevron {
    transform: rotate(180deg);
}

.lexa-pdfmerge .pdfm-section-body {
    padding: 4px 18px 18px;
    border-top: 1px solid var(--pdfm-line-soft);
    animation: pdfmFadeIn 0.2s ease-out;
}

/* ==========================================================================
   Form fields
   ========================================================================== */
.lexa-pdfmerge .pdfm-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
    padding-top: 14px;
}

.lexa-pdfmerge .pdfm-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.lexa-pdfmerge .pdfm-field-inline {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    margin-top: 14px;
}

.lexa-pdfmerge .pdfm-field-inline .pdfm-field-label {
    flex-shrink: 0;
    margin: 0;
}

.lexa-pdfmerge .pdfm-field-inline .pdfm-input {
    flex: 1;
}

.lexa-pdfmerge .pdfm-field-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--pdfm-text-soft);
}

.lexa-pdfmerge .pdfm-input {
    display: block;
    width: 100%;
    padding: 9px 12px;
    font-size: 0.9375rem;
    color: var(--pdfm-text);
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line-strong);
    border-radius: var(--pdfm-radius-sm);
    transition: border-color var(--pdfm-transition), box-shadow var(--pdfm-transition);
    outline: none;
}

.lexa-pdfmerge .pdfm-input:hover {
    border-color: var(--pdfm-text-muted);
}

.lexa-pdfmerge .pdfm-input:focus {
    border-color: var(--pdfm-primary);
    box-shadow: 0 0 0 3px var(--pdfm-primary-soft);
}

.lexa-pdfmerge .pdfm-input::placeholder {
    color: var(--pdfm-text-muted);
}

/* ==========================================================================
   Toggles (custom switch + label)
   ========================================================================== */
.lexa-pdfmerge .pdfm-toggle {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    cursor: pointer;
    border-bottom: 1px solid var(--pdfm-line-soft);
    align-items: flex-start;
}

.lexa-pdfmerge .pdfm-toggle:last-of-type {
    border-bottom: none;
}

.lexa-pdfmerge .pdfm-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.lexa-pdfmerge .pdfm-toggle-slider {
    position: relative;
    display: inline-block;
    width: 38px;
    height: 22px;
    background: var(--pdfm-line-strong);
    border-radius: 100px;
    flex-shrink: 0;
    transition: background var(--pdfm-transition);
    margin-top: 2px;
}

.lexa-pdfmerge .pdfm-toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: transform var(--pdfm-transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.lexa-pdfmerge .pdfm-toggle input:checked + .pdfm-toggle-slider {
    background: var(--pdfm-primary);
}

.lexa-pdfmerge .pdfm-toggle input:checked + .pdfm-toggle-slider::before {
    transform: translateX(-16px);
}

.lexa-pdfmerge .pdfm-toggle input:focus-visible + .pdfm-toggle-slider {
    box-shadow: 0 0 0 3px var(--pdfm-primary-soft);
}

.lexa-pdfmerge .pdfm-toggle-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.lexa-pdfmerge .pdfm-toggle-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--pdfm-text);
}

.lexa-pdfmerge .pdfm-toggle-desc {
    font-size: 0.8125rem;
    color: var(--pdfm-text-soft);
    line-height: 1.45;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.lexa-pdfmerge .pdfm-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 9px 16px;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--pdfm-text);
    background: var(--pdfm-paper);
    border: 1px solid var(--pdfm-line);
    border-radius: var(--pdfm-radius-sm);
    cursor: pointer;
    transition: all var(--pdfm-transition);
    white-space: nowrap;
    text-decoration: none;
}

.lexa-pdfmerge .pdfm-btn:hover {
    background: var(--pdfm-bg);
    border-color: var(--pdfm-line-strong);
}

.lexa-pdfmerge .pdfm-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--pdfm-primary-soft);
}

.lexa-pdfmerge .pdfm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.lexa-pdfmerge .pdfm-btn svg {
    width: 16px;
    height: 16px;
}

.lexa-pdfmerge .pdfm-btn-primary {
    background: var(--pdfm-primary);
    color: white;
    border-color: var(--pdfm-primary);
    box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
}

.lexa-pdfmerge .pdfm-btn-primary:hover {
    background: var(--pdfm-primary-dark);
    border-color: var(--pdfm-primary-dark);
    box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
    transform: translateY(-1px);
}

.lexa-pdfmerge .pdfm-btn-secondary {
    background: var(--pdfm-primary-softer);
    color: var(--pdfm-primary-dark);
    border-color: var(--pdfm-primary-soft);
}

.lexa-pdfmerge .pdfm-btn-secondary:hover {
    background: var(--pdfm-primary-soft);
    border-color: var(--pdfm-primary-light);
}

.lexa-pdfmerge .pdfm-btn-ghost {
    background: transparent;
    color: var(--pdfm-text-soft);
    border-color: transparent;
}

.lexa-pdfmerge .pdfm-btn-ghost:hover {
    background: var(--pdfm-line-soft);
    color: var(--pdfm-text);
}

.lexa-pdfmerge .pdfm-btn-large {
    padding: 13px 28px;
    font-size: 1rem;
    border-radius: var(--pdfm-radius);
}

.lexa-pdfmerge .pdfm-btn-large svg {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   Actions bar
   ========================================================================== */
.lexa-pdfmerge .pdfm-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(to right, var(--pdfm-primary-softer), var(--pdfm-paper));
    border: 1px solid var(--pdfm-primary-soft);
    border-radius: var(--pdfm-radius);
    flex-wrap: wrap;
}

.lexa-pdfmerge .pdfm-actions-meta {
    margin: 0;
    font-size: 0.875rem;
    color: var(--pdfm-text-soft);
}

.lexa-pdfmerge .pdfm-actions-meta strong {
    color: var(--pdfm-text);
    font-weight: 700;
}

/* ==========================================================================
   Overlay (progress / success)
   ========================================================================== */
.lexa-pdfmerge .pdfm-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 20px;
    animation: pdfmFadeIn 0.2s ease-out;
}

.lexa-pdfmerge .pdfm-overlay-card {
    background: var(--pdfm-paper);
    border-radius: var(--pdfm-radius-xl);
    padding: 40px 36px;
    max-width: 440px;
    width: 100%;
    text-align: center;
    box-shadow: var(--pdfm-shadow-xl);
    animation: pdfmZoomIn 0.25s cubic-bezier(0.2, 0.8, 0.4, 1.2);
}

.lexa-pdfmerge .pdfm-overlay-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--pdfm-text);
    margin: 16px 0 8px;
}

.lexa-pdfmerge .pdfm-overlay-status {
    font-size: 0.9375rem;
    color: var(--pdfm-text-soft);
    margin: 12px 0 0;
    line-height: 1.6;
}

.lexa-pdfmerge .pdfm-success-meta {
    color: var(--pdfm-text);
    font-weight: 600;
}

.lexa-pdfmerge .pdfm-cleared-note {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    color: var(--pdfm-primary-dark);
    font-weight: 600;
    font-size: 0.875rem;
}

.lexa-pdfmerge .pdfm-cleared-note svg {
    width: 14px;
    height: 14px;
}

/* Spinner */
.lexa-pdfmerge .pdfm-spinner {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    color: var(--pdfm-primary);
    margin: 0 auto;
}

.lexa-pdfmerge .pdfm-spinner svg {
    width: 100%;
    height: 100%;
    animation: pdfmSpin 1.2s linear infinite;
}

.lexa-pdfmerge .pdfm-spinner circle {
    stroke-dasharray: 90, 150;
    stroke-dashoffset: 0;
    animation: pdfmDash 1.5s ease-in-out infinite;
}

/* Progress bar */
.lexa-pdfmerge .pdfm-progress-bar {
    width: 100%;
    height: 8px;
    background: var(--pdfm-line);
    border-radius: 100px;
    overflow: hidden;
    margin: 18px 0 0;
}

.lexa-pdfmerge .pdfm-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--pdfm-primary), var(--pdfm-primary-light));
    border-radius: 100px;
    transition: width 0.3s ease;
}

/* Success */
.lexa-pdfmerge .pdfm-success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--pdfm-success-soft);
    color: var(--pdfm-success);
    border-radius: 50%;
    margin: 0 auto;
    animation: pdfmBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lexa-pdfmerge .pdfm-success-icon svg {
    width: 32px;
    height: 32px;
}

.lexa-pdfmerge .pdfm-overlay-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* ==========================================================================
   Toast
   ========================================================================== */
.lexa-pdfmerge .pdfm-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--pdfm-text);
    color: white;
    padding: 12px 20px;
    border-radius: var(--pdfm-radius);
    font-size: 0.9375rem;
    font-weight: 500;
    box-shadow: var(--pdfm-shadow-lg);
    z-index: 10001;
    max-width: 90vw;
    animation: pdfmToastIn 0.3s ease-out;
}

.lexa-pdfmerge .pdfm-toast.is-error {
    background: var(--pdfm-danger);
}

.lexa-pdfmerge .pdfm-toast.is-warning {
    background: var(--pdfm-warning);
    color: var(--pdfm-text);
}

.lexa-pdfmerge .pdfm-toast.is-leaving {
    animation: pdfmToastOut 0.3s ease-in forwards;
}

/* ==========================================================================
   Sortable drag states
   ========================================================================== */
.lexa-pdfmerge .pdfm-sortable-ghost {
    opacity: 0.3;
}

.lexa-pdfmerge .pdfm-sortable-chosen {
    cursor: grabbing !important;
}

.lexa-pdfmerge .pdfm-sortable-drag {
    opacity: 0.95;
    transform: rotate(1deg);
    box-shadow: var(--pdfm-shadow-lg) !important;
}

/* Document-wide drag indicator (when dragging files from explorer) */
.lexa-pdfmerge.is-document-dragover .pdfm-dropzone {
    border-color: var(--pdfm-primary);
    background: var(--pdfm-primary-softer);
}

.lexa-pdfmerge.is-document-dragover .pdfm-files-list,
.lexa-pdfmerge.is-document-dragover .pdfm-pages-grid {
    outline: 2px dashed var(--pdfm-primary);
    outline-offset: 6px;
    border-radius: var(--pdfm-radius);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes pdfmFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pdfmZoomIn {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pdfmSlideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pdfmSpin {
    to { transform: rotate(360deg); }
}

@keyframes pdfmDash {
    0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
    50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
    100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
}

@keyframes pdfmShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes pdfmBounce {
    0% { transform: scale(0); }
    60% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes pdfmToastIn {
    from { opacity: 0; transform: translate(-50%, 20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes pdfmToastOut {
    to { opacity: 0; transform: translate(-50%, 20px); }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .lexa-pdfmerge .pdfm-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .lexa-pdfmerge .pdfm-title {
        font-size: 1.5rem;
    }

    .lexa-pdfmerge .pdfm-dropzone {
        padding: 44px 18px;
    }

    .lexa-pdfmerge .pdfm-dropzone-icon {
        width: 60px;
        height: 60px;
    }

    .lexa-pdfmerge .pdfm-dropzone-icon svg {
        width: 28px;
        height: 28px;
    }

    .lexa-pdfmerge .pdfm-dropzone-title {
        font-size: 1.15rem;
    }

    .lexa-pdfmerge .pdfm-toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
    }

    .lexa-pdfmerge .pdfm-toolbar-left,
    .lexa-pdfmerge .pdfm-stats {
        width: 100%;
        justify-content: center;
    }

    .lexa-pdfmerge .pdfm-view-toggle {
        width: 100%;
    }

    .lexa-pdfmerge .pdfm-view-btn {
        flex: 1;
        justify-content: center;
    }

    .lexa-pdfmerge .pdfm-form-grid {
        grid-template-columns: 1fr;
    }

    .lexa-pdfmerge .pdfm-actions {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .lexa-pdfmerge .pdfm-btn-large {
        width: 100%;
    }

    .lexa-pdfmerge .pdfm-pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 10px;
        padding: 12px;
    }

    .lexa-pdfmerge .pdfm-file-header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .lexa-pdfmerge .pdfm-file-info {
        flex: 1 1 100%;
        order: 10;
        min-width: 100%;
    }

    .lexa-pdfmerge .pdfm-overlay-card {
        padding: 28px 22px;
    }
}

@media (max-width: 480px) {
    .lexa-pdfmerge .pdfm-page-thumb {
        width: 90px;
    }

    .lexa-pdfmerge .pdfm-overlay-actions {
        flex-direction: column;
    }

    .lexa-pdfmerge .pdfm-overlay-actions .pdfm-btn {
        width: 100%;
    }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    .lexa-pdfmerge *,
    .lexa-pdfmerge *::before,
    .lexa-pdfmerge *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}