/* ============================================
   PDF42 App Styles
   Main application interface
   ============================================ */

/* Import base styles from landing page */
@import url('styles.css');

/* ============================================
   Tool Selector
   ============================================ */
.tool-selector {
    padding: var(--space-xl) 0 var(--space-lg);
    text-align: center;
}

.tool-selector__title {
    font-family: var(--font-serif);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.tool-selector__subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.tools {
    padding-bottom: var(--space-xl);
}

.tools__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
}

.tools__grid {
    display: grid;
    gap: var(--space-md);
}

/* ============================================
   Tool Card
   ============================================ */
.tool-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tool-card:not([disabled]):hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: 0 12px 24px var(--shadow-md);
}

.tool-card:not([disabled]):active {
    transform: translateY(-2px);
}

.tool-card[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

.tool-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tool-card__icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--accent-primary);
    transition: transform var(--transition-base);
}

.tool-card:not([disabled]):hover .tool-card__icon svg {
    transform: scale(1.1);
}

.tool-card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.tool-card__desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.tool-card__badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--accent-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tool-card__badge--coming {
    background: var(--text-tertiary);
}

/* ============================================
   Workspace
   ============================================ */
.workspace {
    padding: var(--space-3xl) 0;
}

.workspace__back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-2xl);
}

.workspace__back:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.workspace__content {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    box-shadow: 0 8px 32px var(--shadow-md);
}

/* ============================================
   Upload Zone
   ============================================ */
.upload-zone {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-4xl) var(--space-2xl);
    text-align: center;
    background: var(--bg-secondary);
    transition: all var(--transition-base);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(37, 99, 235, 0.05);
}

.upload-zone__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-zone__icon svg {
    width: 64px;
    height: 64px;
    stroke: var(--accent-primary);
}

.upload-zone__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.upload-zone__subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.upload-zone__hint {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

/* ============================================
   File List
   ============================================ */
.file-list {
    margin-top: var(--space-2xl);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
}

.file-item__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.file-item__icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--accent-primary);
}

.file-item__info {
    flex: 1;
}

.file-item__name {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    word-break: break-all;
}

.file-item__size {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.file-item__remove {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.file-item__remove:hover {
    background: var(--bg-tertiary);
    color: var(--color-error);
}

/* ============================================
   Process Button
   ============================================ */
.process-section {
    margin-top: var(--space-2xl);
    text-align: center;
}

.btn--process {
    padding: var(--space-lg) var(--space-3xl);
    font-size: var(--font-size-lg);
    min-width: 200px;
}

.btn--process:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   Progress Indicator
   ============================================ */
.progress {
    margin-top: var(--space-2xl);
    display: none;
}

.progress.active {
    display: block;
}

.progress__bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.progress__bar {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
    width: 0%;
}

.progress__text {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================
   Result Section
   ============================================ */
.result {
    margin-top: var(--space-2xl);
    padding: var(--space-2xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    text-align: center;
    display: none;
}

.result.active {
    display: block;
}

.result__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result__icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--color-success);
}

.result__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.result__subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.result__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }

    .workspace__content {
        padding: var(--space-xl);
    }

    .upload-zone {
        padding: var(--space-2xl) var(--space-lg);
    }

    .result__actions {
        flex-direction: column;
    }

    .result__actions .btn {
        width: 100%;
    }
}

/* ============================================
   PDF Preview Component
   ============================================ */
.file-item--with-preview {
    flex-direction: column;
    align-items: stretch;
}

.file-item__header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
}

.file-item__preview {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
}

.pdf-preview {
    width: 100%;
}

.pdf-preview__metadata {
    margin-bottom: var(--space-lg);
}

.pdf-preview__info {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.pdf-preview__info-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.pdf-preview__info-item svg {
    flex-shrink: 0;
    stroke: var(--accent-primary);
}

.pdf-preview__info-item strong {
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
}

.pdf-preview__thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
}

.pdf-preview__thumbnail {
    position: relative;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: white;
    transition: all var(--transition-fast);
}

.pdf-preview__thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-md);
    z-index: 1;
}

.pdf-preview__thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.pdf-preview__thumbnail-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    font-size: var(--font-size-xs);
    padding: var(--space-sm);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.pdf-preview__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.pdf-preview--error {
    padding: var(--space-lg);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--color-error);
}

.pdf-preview--error small {
    display: block;
    margin-top: var(--space-sm);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Spinner animation for loading state */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive PDF preview */
@media (max-width: 768px) {
    .pdf-preview__thumbnails {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .pdf-preview__info {
        flex-direction: column;
        gap: var(--space-sm);
    }
}

/* ============================================
   PDF Quick Preview Button
   ============================================ */
.pdf-preview__metadata {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.pdf-preview__quick-view-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.pdf-preview__quick-view-btn:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.pdf-preview__quick-view-btn svg {
    flex-shrink: 0;
}

/* ============================================
   Interactive PDF Viewer Modal
   ============================================ */
.pdf-viewer-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.pdf-viewer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.pdf-viewer-container {
    position: relative;
    width: 90vw;
    max-width: 1200px;
    height: 90vh;
    background: white;
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.pdf-viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.pdf-viewer-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.pdf-viewer-title svg {
    stroke: var(--accent-primary);
    flex-shrink: 0;
}

.pdf-viewer-title span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pdf-viewer-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pdf-viewer-close:hover {
    background: var(--bg-tertiary);
    color: var(--color-error);
}

.pdf-viewer-content {
    flex: 1;
    overflow: auto;
    padding: var(--space-xl);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.pdf-viewer-content canvas {
    max-width: 100%;
    height: auto;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    display: none;
}

.pdf-viewer-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    color: var(--text-secondary);
}

.pdf-viewer-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--border-light);
    background: white;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    gap: var(--space-md);
    flex-wrap: wrap;
}

.pdf-viewer-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.pdf-viewer-btn:hover:not(:disabled) {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.pdf-viewer-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pdf-viewer-btn svg {
    flex-shrink: 0;
}

.pdf-viewer-btn--icon {
    padding: var(--space-sm);
}

.pdf-viewer-page-info {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.pdf-viewer-zoom {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

#pdf-zoom-level {
    min-width: 50px;
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive PDF Viewer */
@media (max-width: 768px) {
    .pdf-viewer-container {
        width: 95vw;
        height: 95vh;
    }

    .pdf-viewer-header {
        padding: var(--space-md);
    }

    .pdf-viewer-content {
        padding: var(--space-md);
    }

    .pdf-viewer-controls {
        padding: var(--space-md);
        flex-direction: column;
    }

    .pdf-viewer-zoom {
        width: 100%;
        justify-content: center;
    }

    .pdf-viewer-btn {
        flex: 1;
        justify-content: center;
    }
}

/* ============================================
   Page Operation Tools Styles
   Rotate, Remove, Extract Pages
   ============================================ */

/* Rotate Pages Container */
.rotate-pages-container {
    margin-top: var(--space-xl);
}

.rotate-controls-top {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.rotate-pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.rotate-page-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.rotate-page-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.page-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 0.707;
    /* A4 ratio */
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-thumbnail canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.rotation-controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    justify-content: space-between;
}

.page-number {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
}

/* Page Selection Container */
.page-selection-container {
    margin-top: var(--space-xl);
}

.selection-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.selection-info p {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.selection-info #selected-count {
    color: var(--primary);
    font-weight: var(--font-weight-bold);
}

.selection-info div {
    display: flex;
    gap: var(--space-sm);
}

.page-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-lg);
}

.page-selection-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
}

.page-selection-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.page-checkbox {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    z-index: 2;
}

.page-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

.page-selection-item .page-thumbnail {
    cursor: pointer;
    width: 100%;
}

.page-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0);
    transition: all var(--transition-base);
    pointer-events: none;
}

.page-overlay.selected {
    background: rgba(var(--primary-rgb), 0.2);
    border: 3px solid var(--primary);
    border-radius: var(--radius-md);
}

.page-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.page-label:hover {
    color: var(--primary);
}

.btn--sm {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
}

/* Responsive adjustments for page tools */
@media (max-width: 768px) {

    .rotate-pages-grid,
    .page-selection-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--space-md);
    }

    .rotate-controls-top {
        flex-direction: column;
    }

    .selection-info {
        flex-direction: column;
        align-items: flex-start;
    }

    .selection-info div {
        width: 100%;
    }

    .selection-info button {
        flex: 1;
    }
}

/* ============================================
   Week 2 Tools - Additional Styles
   Security, Conversion, Editing
   ============================================ */

/* Settings Cards */
.settings-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.protection-settings,
.conversion-settings,
.watermark-settings,
.pagenumber-settings {
    margin-top: var(--space-xl);
}

/* Image Preview Grid (for PDF to JPG) */
.image-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.image-preview-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    transition: all var(--transition-base);
}

.image-preview-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.image-preview-item img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.image-preview-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
}

/* Watermark Preview */
.watermark-preview {
    margin-top: var(--space-xl);
}

#preview-container {
    position: relative;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#preview-container canvas,
#preview-container-pagenumber canvas {
    width: 100%;
    height: auto;
    display: block;
}

.preview-watermark-overlay,
.preview-pagenumber-overlay {
    position: absolute;
    pointer-events: none;
    user-select: none;
}

/* Position Selector for Page Numbers */
.position-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.position-btn:hover {
    border-color: var(--primary);
    background: var(--bg-tertiary);
}

.position-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.position-icon {
    width: 60px;
    height: 80px;
    position: relative;
    background: white;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
}

.position-btn.active .position-icon {
    border-color: white;
}

.position-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--text-primary);
    border-radius: 50%;
}

.position-btn.active .position-dot {
    background: var(--primary);
}

.position-btn span {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

/* Password Section */
.password-section {
    margin: var(--space-xl) 0;
}

#password-error {
    color: #ef4444;
    font-size: var(--font-size-sm);
    margin-top: var(--space-sm);
}

/* Converted Images Container */
.converted-images {
    margin-top: var(--space-xl);
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

/* Responsive Styles for Week 2 Tools */
@media (max-width:768px) {
    .settings-card {
        padding: var(--space-lg);
    }

    .image-preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--space-md);
    }

    .position-btn {
        padding: var(--space-md);
    }

    .position-icon {
        width: 50px;
        height: 70px;
    }
}

/* ============================================
   Week 3 Tools - Flatten & Crop
   ============================================ */

/* Flatten PDF Settings */
.flatten-settings {
    margin-top: var(--space-xl);
}

/* Crop PDF Settings */
.crop-settings {
    margin-top: var(--space-xl);
}

.crop-preview {
    margin-top: var(--space-xl);
}

#preview-container-crop {
    position: relative;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#preview-container-crop canvas {
    width: 100%;
    height: auto;
    display: block;
}

.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Custom margins grid */
#custom-margins {
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}