/* ==================== REMOVE PAGES FROM PDF - Merge PDFs style ==================== */

body {
    background: linear-gradient(135deg, #0f1419 0%, #1a2332 50%, #0f1419 100%) !important;
    color: var(--text-primary);
}

.remove-pages-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    color: var(--text-primary);
}

.header-section {
    text-align: center;
    margin-bottom: 40px;
}

.header-section h1 {
    color: var(--text-primary);
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-weight: 800;
}

.header-section h1 i {
    color: #f79112;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin: 0;
}

.upload-section {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
}

.drop-zone-pdf {
    border: 3px dashed var(--primary-light);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.03);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 220px;
}

.drop-zone-pdf:hover {
    border-color: #f79112;
    background: rgba(247, 145, 18, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(247, 145, 18, 0.3);
}

.drop-zone-pdf.drag-over {
    border-color: #f79112;
    background: rgba(247, 145, 18, 0.15);
    transform: scale(1.02);
}

.drop-zone-pdf.loading {
    pointer-events: none;
}

.drop-zone-pdf.loading .upload-content {
    opacity: 0.5;
}

.drop-zone-pdf.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(247, 145, 18, 0.3), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    to { left: 100%; }
}

/* Progress bar inside drop zone (same style as merge convert-section progress) */
.drop-zone-progress-wrap {
    width: 100%;
    max-width: 400px;
    margin-top: 20px;
    text-align: center;
}

.drop-zone-progress-text {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    margin: 0 0 10px 0;
}

.drop-zone-progress-bar {
    width: 100%;
    height: 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.3);
}

.drop-zone-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color) 0%, #f79112 100%);
    transition: width 0.25s ease;
    border-radius: 15px;
    width: 0%;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.upload-icon {
    margin-bottom: 20px;
}

.upload-icon i {
    font-size: 3rem;
    color: #f79112;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.drop-zone-pdf h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin: 10px 0;
}

.drop-zone-pdf p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 10px 0 20px 0;
}

.supported-formats small {
    color: #f79112;
    font-size: 0.9rem;
}

.supported-formats i {
    margin-right: 5px;
}

/* Preview container - same as merge */
.preview-container {
    margin-top: 30px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes slideOutAndFade {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.8);
    }
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-light);
    flex-wrap: wrap;
    gap: 15px;
}

.preview-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.preview-header h3 i {
    color: #f79112;
}

.preview-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-light);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.btn-secondary:hover {
    background-color: var(--primary-light);
    border-color: #f79112;
    transform: translateY(-2px);
}

/* Quick selection & range (presets) */
.quick-actions-section {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--primary-light);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 18px;
}

.quick-actions-section h4 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin: 0 0 14px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.quick-actions-section h4 i {
    color: #f79112;
}

.quick-actions-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.quick-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 2px solid var(--primary-light);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.quick-btn:hover {
    border-color: #f79112;
    background: rgba(247, 145, 18, 0.15);
    transform: translateY(-1px);
}

.quick-btn-apply {
    background: linear-gradient(135deg, #f79112 0%, #ff6b35 100%);
    border-color: #f79112;
    color: white;
}

.quick-btn-apply:hover {
    background: #f79112;
    box-shadow: 0 4px 12px rgba(247, 145, 18, 0.4);
}

.range-input-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.range-input-row label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

.range-input {
    flex: 1;
    min-width: 180px;
    padding: 10px 14px;
    border: 2px solid var(--primary-light);
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.range-input:focus {
    outline: none;
    border-color: #f79112;
    background: rgba(255, 255, 255, 0.08);
}

.range-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.marked-pages-display {
    margin-top: 14px;
    padding: 10px 14px;
    background: rgba(231, 76, 60, 0.12);
    border: 1px solid rgba(231, 76, 60, 0.35);
    border-radius: 8px;
    font-size: 0.95rem;
}

.marked-pages-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-right: 6px;
}

.marked-pages-list {
    color: #e74c3c;
    font-weight: 600;
}

.marked-pages-display.empty .marked-pages-list {
    color: var(--text-secondary);
    font-weight: normal;
}

/* Selection summary */
.selection-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    padding: 12px 16px;
    background: rgba(247, 145, 18, 0.1);
    border: 1px solid rgba(247, 145, 18, 0.3);
    border-radius: 10px;
    font-size: 1rem;
}

.selection-summary #summary-text {
    color: var(--text-primary);
    font-weight: 600;
}

.selection-summary .result-pages {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* PDF grid (card layout) - same as merge-pdf preview-list */
.remove-pages-container .preview-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* GPU: promote cards to own compositing layer for smooth scroll (same as merge-pdf) */
.remove-pages-container .preview-item-page {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.remove-pages-container .preview-item-page:hover {
    border-color: #f79112;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(247, 145, 18, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

/* Card marked for removal - disabled look, "going to be deleted" */
.remove-pages-container .preview-item-page.marked-for-removal {
    border-color: #e74c3c;
    background: rgba(231, 76, 60, 0.12);
    opacity: 0.85;
}

.remove-pages-container .preview-item-page.marked-for-removal:hover {
    border-color: #c0392b;
    background: rgba(231, 76, 60, 0.18);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.25);
}

.remove-pages-container .preview-item-page.marked-for-removal .pdf-thumbnail {
    opacity: 0.6;
}

.remove-pages-container .preview-item-page.marked-for-removal .pdf-order {
    background: #e74c3c;
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.4);
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.remove-pages-container .preview-item-page.marked-for-removal .pdf-order[role="button"]:hover {
    background: #c0392b;
    transform: scale(1.08);
    box-shadow: 0 3px 10px rgba(231, 76, 60, 0.5);
}

.remove-pages-container .preview-item-page.marked-for-removal .pdf-name {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.remove-pages-container .preview-item-page.marked-for-removal .pdf-meta {
    color: #e74c3c;
    font-weight: 600;
}

.remove-pages-container .preview-item-page .pdf-thumbnail {
    width: 100%;
    height: 140px;
    min-height: 140px;
    border-radius: 0;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
    border: none;
    border-bottom: 1px solid var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.remove-pages-container .preview-item-page .pdf-thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.remove-pages-container .preview-item-page .pdf-thumbnail .pdf-icon {
    width: 100%;
    height: 100%;
    min-width: 0;
    background: linear-gradient(135deg, #f79112 0%, #ff6b35 100%);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.remove-pages-container .preview-item-page .pdf-info {
    flex: 1;
    min-width: 0;
    padding: 12px 14px 10px;
}

.remove-pages-container .preview-item-page .pdf-name {
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.95rem;
}

.remove-pages-container .preview-item-page .pdf-meta {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 0;
}

/* Order badge: top-right corner, same as merge */
.remove-pages-container .preview-item-page .pdf-order {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #f79112;
    color: white;
    width: 30px;
    height: 30px;
    min-width: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(247, 145, 18, 0.4);
    transition: all 0.3s ease;
}

/* Delete button at bottom of card - same as merge */
.remove-pages-container .preview-item-page .pdf-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 10px 14px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.remove-pages-container .preview-item-page .btn-delete-pdf {
    background: #e74c3c;
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.remove-pages-container .preview-item-page .btn-delete-pdf:hover {
    background: #c0392b;
    transform: scale(1.08);
}

/* Convert section - same as merge */
.remove-pages-container .convert-section {
    margin-top: 30px;
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.remove-pages-container .merge-summary {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 20px;
}

.remove-pages-container .btn-primary {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
}

.remove-pages-container .btn-primary:hover {
    transform: translateY(-3px);
    background: #f79112;
    box-shadow: 0 6px 20px rgba(247, 145, 18, 0.6);
}

.remove-pages-container .btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.remove-pages-container .btn-large {
    padding: 18px 50px;
    font-size: 1.2rem;
}

.progress-container {
    margin-top: 25px;
    animation: fadeIn 0.3s ease;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color) 0%, #f79112 100%);
    transition: width 0.3s ease;
    border-radius: 15px;
}

.progress-text {
    margin-top: 10px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
}

/* Instructions - same as merge; content-visibility saves GPU/CPU until in view */
.instructions-section {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
    content-visibility: auto;
}

.instructions-section h2 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-weight: 800;
}

.instructions-section h2 i {
    color: #f79112;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--primary-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.step-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(247, 145, 18, 0.3);
    border-color: #f79112;
    background: rgba(255, 255, 255, 0.05);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #f79112 0%, #ff6b35 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(247, 145, 18, 0.4);
}

.step-content h3 {
    color: var(--text-primary);
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 700;
}

.step-content p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Features guide */
/* Blog / complete guide (same style as sign-pdf guide); content-visibility for performance */
.remove-pages-guide {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin: 36px 0;
    backdrop-filter: blur(10px);
    content-visibility: auto;
}

.remove-pages-guide h2 {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 28px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    color: var(--text-primary);
}

.remove-pages-guide h2 i {
    color: #f79112;
}

.remove-pages-guide .guide-block {
    margin-bottom: 28px;
}

.remove-pages-guide .guide-block:last-of-type {
    margin-bottom: 0;
}

.remove-pages-guide h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #f79112;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.remove-pages-guide h3 i {
    font-size: 1.1em;
    opacity: 0.95;
}

.remove-pages-guide h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 18px 0 8px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.remove-pages-guide h4 i {
    color: #f79112;
    font-size: 0.95em;
    opacity: 0.9;
    width: 1.2em;
    text-align: center;
}

.remove-pages-guide p {
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0 0 12px;
    font-size: 1rem;
}

.remove-pages-guide .guide-block > p:last-child {
    margin-bottom: 0;
}

.features-guide-section {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
}

.features-guide-section h2 {
    color: var(--text-primary);
    font-size: 1.75rem;
    margin-bottom: 20px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-weight: 800;
    flex-wrap: wrap;
}

.features-guide-section h2 i {
    color: #f79112;
}

.features-lead {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0 0 28px 0;
    text-align: center;
}

.feature-block {
    margin-bottom: 24px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--primary-light);
    border-left: 4px solid #f79112;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.feature-block:hover {
    border-color: #f79112;
    background: rgba(255, 255, 255, 0.05);
}

.feature-block h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin: 0 0 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-block h3 i {
    color: #f79112;
}

.feature-block p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
}

/* FAQ */
.faq-section {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--primary-light);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
    content-visibility: auto;
}

.faq-section h2 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-weight: 800;
}

.faq-section h2 i {
    color: #f79112;
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item-pdf {
    margin-bottom: 15px;
    border: 2px solid var(--primary-light);
    border-radius: 8px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.03);
    transition: all 0.3s ease;
}

.faq-item-pdf:hover {
    border-color: #f79112;
}

.faq-question-pdf {
    padding: 15px 15px 15px 40px;
    background-color: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    font-size: 1.1em;
    transition: all 0.3s ease;
}

.faq-question-pdf::before {
    content: '+';
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5em;
    font-weight: normal;
    line-height: 1;
    transition: transform 0.3s ease;
    color: #f79112;
}

.faq-item-pdf.active .faq-question-pdf {
    background-color: rgba(247, 145, 18, 0.2);
    color: var(--text-primary);
    border-bottom: 2px solid #f79112;
}

.faq-item-pdf.active .faq-question-pdf::before {
    content: '-';
    transform: translateY(-50%) rotate(180deg);
}

.faq-answer-pdf {
    background-color: rgba(255, 255, 255, 0.03);
    padding: 0 15px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.5s ease;
}

.faq-item-pdf.active .faq-answer-pdf {
    padding: 15px;
    max-height: 1000px;
}

.faq-answer-pdf p {
    margin: 0;
    font-size: 1.1em;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Responsive - same breakpoints as merge-pdf / sign-pdf */
@media (max-width: 992px) {
    .remove-pages-container .preview-list {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
    .steps-container {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .header-section h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    .subtitle {
        font-size: 1rem;
    }
    .upload-section {
        padding: 20px;
    }
    .remove-pages-container .drop-zone-pdf {
        padding: 30px 20px;
        min-height: 200px;
    }
    .remove-pages-container .drop-zone-pdf h3 {
        font-size: 1.2rem;
    }
    .remove-pages-container .upload-icon i {
        font-size: 3rem;
    }
    .preview-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .preview-header h3 {
        font-size: 1.15rem;
    }
    .remove-pages-container .preview-list {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail {
        height: 110px;
        min-height: 110px;
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail .pdf-icon {
        font-size: 1.5rem;
    }
    .remove-pages-container .preview-item-page .pdf-info {
        padding: 10px 12px 8px;
    }
    .remove-pages-container .preview-item-page .pdf-name {
        font-size: 0.9rem;
    }
    .remove-pages-container .preview-item-page .pdf-meta {
        font-size: 0.75rem;
    }
    .remove-pages-container .preview-item-page .pdf-actions {
        padding: 8px 12px 10px;
    }
    .remove-pages-container .preview-item-page .pdf-order {
        top: 10px;
        right: 10px;
        width: 32px;
        height: 32px;
        min-width: 32px;
        font-size: 0.9rem;
    }
    .remove-pages-container .preview-item-page .btn-delete-pdf {
        width: 32px;
        height: 32px;
        min-width: 32px;
    }
    .quick-actions-section {
        padding: 16px 18px;
    }
    .quick-actions-section h4 {
        font-size: 1.05rem;
    }
    .quick-actions-grid {
        flex-direction: column;
    }
    .quick-btn {
        width: 100%;
        justify-content: center;
        padding: 10px 14px;
    }
    .range-input-row {
        flex-direction: column;
        align-items: stretch;
    }
    .range-input {
        min-width: 0;
    }
    .selection-summary {
        padding: 10px 14px;
        font-size: 0.95rem;
    }
    .marked-pages-display {
        font-size: 0.9rem;
        padding: 8px 12px;
    }
    .instructions-section,
    .faq-section,
    .remove-pages-guide {
        padding: 26px 18px;
    }
    .instructions-section h2,
    .faq-section h2,
    .remove-pages-guide h2 {
        font-size: 1.5rem;
        flex-direction: column;
    }
    .remove-pages-guide h3 {
        font-size: 1.15rem;
    }
    .remove-pages-guide h4 {
        font-size: 1rem;
    }
    .steps-container {
        grid-template-columns: 1fr;
    }
    .btn-large {
        padding: 15px 35px;
        font-size: 1rem;
    }
    .preview-actions {
        gap: 10px;
    }
    .btn-secondary {
        font-size: 0.9rem;
        padding: 8px 15px;
    }
    .remove-pages-container .merge-summary {
        font-size: 0.9rem;
        margin-bottom: 16px;
    }
    .drop-zone-progress-text {
        font-size: 0.95rem;
    }
    /* GPU acceleration + performance: same as merge-pdf — own compositor layer, no backdrop-filter */
    .remove-pages-container .preview-item-page {
        transform: translateZ(0);
        -webkit-transform: translateZ(0);
        will-change: transform;
        background: rgba(255, 255, 255, 0.08);
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail,
    .remove-pages-container .preview-item-page .pdf-thumbnail-img {
        transform: translateZ(0);
        -webkit-transform: translateZ(0);
    }
    .upload-section,
    .remove-pages-container .preview-item-page,
    .instructions-section,
    .remove-pages-guide,
    .faq-section {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
}

@media (max-width: 480px) {
    .remove-pages-container {
        padding: 10px;
    }
    .header-section h1 {
        font-size: 1.5rem;
    }
    .upload-section {
        padding: 15px;
    }
    .remove-pages-container .drop-zone-pdf {
        padding: 25px 15px;
        min-height: 180px;
    }
    .remove-pages-container .drop-zone-pdf h3 {
        font-size: 1.1rem;
    }
    .remove-pages-container .drop-zone-pdf p,
    .remove-pages-container .supported-formats small {
        font-size: 0.9rem;
    }
    .preview-header h3 {
        font-size: 1.1rem;
    }
    .remove-pages-container .preview-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail {
        height: 100px;
        min-height: 100px;
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail .pdf-icon {
        font-size: 1.3rem;
    }
    .remove-pages-container .preview-item-page .pdf-info {
        padding: 8px 10px 6px;
    }
    .remove-pages-container .preview-item-page .pdf-name {
        font-size: 0.85rem;
    }
    .remove-pages-container .preview-item-page .pdf-meta {
        font-size: 0.7rem;
    }
    .remove-pages-container .preview-item-page .pdf-actions {
        padding: 6px 10px 8px;
        gap: 6px;
    }
    .remove-pages-container .preview-item-page .pdf-order {
        width: 30px;
        height: 30px;
        min-width: 30px;
        font-size: 0.8rem;
        top: 8px;
        right: 8px;
    }
    .remove-pages-container .preview-item-page .btn-delete-pdf {
        width: 30px;
        height: 30px;
        min-width: 30px;
    }
    .quick-actions-section {
        padding: 14px 12px;
    }
    .quick-actions-section h4 {
        font-size: 1rem;
    }
    .quick-btn {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
    .selection-summary {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    .marked-pages-display {
        font-size: 0.85rem;
        padding: 8px 10px;
    }
    .preview-actions {
        flex-direction: column;
        width: 100%;
    }
    .btn-secondary {
        width: 100%;
        justify-content: center;
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    .btn-large {
        width: 100%;
        padding: 15px 25px;
    }
    .remove-pages-container .merge-summary {
        font-size: 0.85rem;
        text-align: center;
    }
    .instructions-section,
    .faq-section,
    .remove-pages-guide {
        padding: 20px 14px;
        backdrop-filter: none;
    }
    .instructions-section h2,
    .faq-section h2,
    .remove-pages-guide h2 {
        font-size: 1.35rem;
    }
    .remove-pages-guide h3 {
        font-size: 1.1rem;
    }
    .remove-pages-guide h4 {
        font-size: 0.95rem;
    }
    .faq-question-pdf {
        padding: 12px 15px 12px 45px;
        font-size: 0.95rem;
        word-wrap: break-word;
        line-height: 1.4;
    }
    .faq-question-pdf::before {
        font-size: 1.3em;
        left: 12px;
    }
    .faq-answer-pdf p {
        font-size: 0.9rem;
    }
    .step-item {
        padding: 14px;
    }
    .remove-pages-container .preview-item-page {
        animation-duration: 0.3s !important;
    }
    /* Disable hover lift on touch devices — avoids GPU layer churn (same as sign-pdf) */
    .remove-pages-container .preview-item-page:hover {
        transform: translateZ(0);
        -webkit-transform: translateZ(0);
    }
    .remove-pages-container .preview-item-page.marked-for-removal:hover {
        transform: translateZ(0);
        -webkit-transform: translateZ(0);
    }
}

@media (max-width: 360px) {
    .remove-pages-container .preview-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .remove-pages-container .preview-item-page .pdf-thumbnail {
        height: 120px;
        min-height: 120px;
    }
    .header-section h1 {
        font-size: 1.35rem;
    }
}