/* ============================================================
   PDF to Image Converter - Full Styles (Refactored)
   ============================================================ */

/* =====================================================
   1. CSS Variables (موحدة)
   ===================================================== */
:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #f1f5f9;
    --secondary-hover: #e2e8f0;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --text: #1e293b;
    --text-light: #64748b;
    --text-muted: #475569;
    --border: #e2e8f0;
    --border-dark: #cbd5e1;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-success: #d1fae5;
    --bg-danger: #fee2e2;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.1);
    --container-max: 720px;
}


/* =====================================================
   3. File Info Box
   ===================================================== */
.file-box {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    padding: 16px 20px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    box-sizing: border-box;
    display: none;
}
.file-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.file-icon {
    font-size: 20px;
    color: var(--danger);
}
.file-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    flex: 1;
    word-break: break-word;
}
.file-size {
    font-size: 13px;
    color: var(--text-light);
}
.remove-file {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--bg-danger);
    border: none;
    cursor: pointer;
    color: var(--danger);
    font-size: 16px;
    transition: all 0.2s ease;
    flex-shrink: 0;
}
.remove-file:hover {
    background: #fecaca;
    transform: scale(1.05);
}
.page-count {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-light);
}
.page-count i {
    margin-right: 4px;
}

/* =====================================================
   4. Settings Panel (Options)
   ===================================================== */
.tool-settings {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    box-sizing: border-box;
    display: none;
}
.tool-settings h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
}
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px 30px;
}

/* =====================================================
   5. Page Selection (حقل تحديد الصفحات مع المصغرات)
   ===================================================== */
.page-selection-group {
    grid-column: 1 / -1;
}
.page-selection-group label {
    display: flex;
    align-items: center;
    gap: 10px;
}
.badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 0 12px;
    border-radius: 20px;
    line-height: 24px;
    min-width: 40px;
    text-align: center;
}
.page-selection-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 4px;
}
.page-selection-controls input[data-tool-pages] {
    flex: 1;
    min-width: 180px;
    padding: 8px 12px;
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    font-size: 14px;
    background: var(--bg-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.page-selection-controls input[data-tool-pages]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
.page-selection-buttons {
    display: flex;
    gap: 6px;
}
.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: 6px;
}
.selection-counter {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: 20px;
    white-space: nowrap;
}
.page-selection-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-light);
}
.page-selection-hint i {
    margin-right: 4px;
}

/* =====================================================
   6. Format Buttons & ICO
   ===================================================== */
.option-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.option-group label {
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
}
.format-buttons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
    gap: 8px;
}
.format-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px 10px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}
.format-btn i {
    font-size: 13px;
}
.format-btn:hover {
    background: var(--secondary-hover);
    border-color: var(--border-dark);
    transform: translateY(-1px);
}
.format-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.format-btn.active i {
    color: #fff;
}
.format-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Format Note */
.format-note {
    font-size: 12px;
    color: var(--text-light);
    background: var(--bg-light);
    padding: 8px 12px;
    border-radius: 8px;
    border-left: 3px solid var(--primary);
}
.format-note i {
    margin-right: 6px;
    color: var(--primary);
}

/* ICO Size Group */
.ico-size-group {
    margin-top: 12px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: 10px;
    border: 1px solid var(--border);
}
.ico-size-label {
    font-weight: 600;
    font-size: 13px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}
.ico-preset-select {
    width: 100%;
    max-width: 250px;
    padding: 6px 10px;
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    background: #fff;
    font-size: 13px;
    cursor: pointer;
}
.ico-sizes-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}
.ico-sizes-grid label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: normal;
    color: var(--text-muted);
    cursor: pointer;
}
.ico-sizes-grid input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--primary);
    cursor: pointer;
}
.ico-info-note {
    display: block;
    font-size: 11px;
    color: var(--text-light);
}

/* =====================================================
   7. Quality & DPI
   ===================================================== */
.option-select {
    padding: 8px 12px;
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    cursor: pointer;
    transition: border-color 0.2s;
}
.option-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}
.quality-slider {
    display: flex;
    align-items: center;
    gap: 14px;
}
.quality-slider input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    background: var(--border);
    border-radius: 2px;
}
.quality-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}
.quality-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}
.quality-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    min-width: 45px;
    text-align: right;
}

/* =====================================================
   8. Thumbnails Grid & Items
   ===================================================== */
.thumbnails-section {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    display: none;
}
.thumbnails-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
}
.thumbnails-header h4 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
    color: var(--text);
}
.thumbnails-info {
    font-size: 12px;
    color: var(--text-light);
}

.thumbnails-grid-wrapper {
    width: 100%;
}
.thumbnails-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* Thumbnail Item */
.thumbnail-item {
    border: 3px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    background: #fff;
    box-shadow: var(--shadow);
    transition: transform 0.15s, border-color 0.2s, box-shadow 0.2s;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}
.thumbnail-item:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-hover);
}
.thumbnail-item.selected {
    border-color: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.3);
}
.thumbnail-item .page-number {
    position: absolute;
    bottom: 6px;
    right: 8px;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 11px;
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 500;
    pointer-events: none;
}
.thumbnail-item .selection-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    background: #22c55e;
    color: #fff;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}
.thumbnail-item.selected .selection-badge {
    opacity: 1;
}
.thumbnail-item canvas {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1.4;
    object-fit: contain;
}

/* Thumbnails Pagination */
.thumb-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    padding: 12px 0 4px;
}
.thumb-pagination button {
    padding: 6px 16px;
    border: 1px solid var(--border-dark);
    border-radius: 6px;
    background: var(--bg-light);
    cursor: pointer;
    font-size: 14px;
    transition: background 0.15s;
}
.thumb-pagination button:hover:not(:disabled) {
    background: var(--secondary-hover);
}
.thumb-pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.thumb-pagination .page-indicator {
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
}

/* =====================================================
   9. Zoomed Preview (Double Click)
   ===================================================== */
.preview-wrapper {
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    max-width: 1100px;
    display: none;
}
.preview-canvas-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 400px;
}
.preview-canvas-wrapper canvas {
    width: 70% !important;
    max-width: 70% !important;
    height: auto !important;
    display: block;
    margin: 0 auto;
    background: #fff;
    box-shadow: var(--shadow-hover);
    border-radius: 4px;
}

/* =====================================================
   10. Progress Bar
   ===================================================== */
.progress-container {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    position: relative;
    height: 28px;
    background: var(--border);
    border-radius: 30px;
    overflow: hidden;
    display: none;
}
.progress-fill {
    background: var(--primary);
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 30px;
}
.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
}

/* =====================================================
   11. Messages (Success, Error, Warning)
   ===================================================== */
.success-message,
.error-message,
.warning-message {
    max-width: var(--container-max);
    margin: 0 auto 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    display: none;
    align-items: center;
    gap: 8px;
}
.success-message {
    background: var(--bg-success);
    color: #065f46;
    border-left: 4px solid var(--success);
}
.error-message {
    background: var(--bg-danger);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}
.warning-message {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}
.warning-message i {
    color: #f59e0b;
}

/* =====================================================
   12. Loading Indicator
   ===================================================== */
.loading-indicator {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    display: none;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px;
    background: var(--bg-light);
    border-radius: var(--radius);
}
.loading-spinner {
    font-size: 24px;
    color: var(--primary);
}
.loading-text {
    font-size: 14px;
    color: var(--text-light);
}

/* =====================================================
   13. Action Buttons
   ===================================================== */
.action-buttons {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: none;
}
.btn {
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn i {
    font-size: 14px;
}
.btn-secondary {
    background: var(--secondary);
    color: var(--text-muted);
}
.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-1px);
}
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}
.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* =====================================================
   14. Utilities
   ===================================================== */
.hidden {
    display: none !important;
}
.text-center {
    text-align: center;
}

/* =====================================================
   15. Responsive Design
   ===================================================== */
@media (max-width: 768px) {
    .options-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .format-buttons-grid {
        grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
    }
    .format-btn {
        font-size: 11px;
        padding: 6px 8px;
    }
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .action-buttons .btn {
        justify-content: center;
        width: 100%;
    }
    .preview-canvas-wrapper {
        min-height: 250px;
    }
    .preview-canvas-wrapper canvas {
        width: 90% !important;
        max-width: 90% !important;
    }
    .page-selection-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .page-selection-controls input[data-tool-pages] {
        min-width: unset;
    }
    .page-selection-buttons {
        justify-content: center;
    }
    .thumbnails-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .ico-sizes-grid {
        max-height: 150px;
        overflow-y: auto;
    }
}

@media (max-width: 640px) {
    .thumbnails-grid {
        grid-template-columns: repeat(3, 1fr);
        padding: 10px;
        gap: 8px;
    }
    .thumbnail-item .page-number {
        font-size: 9px;
        padding: 1px 6px;
    }
    .thumb-pagination {
        gap: 10px;
    }
    .thumb-pagination button {
        padding: 4px 12px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .format-buttons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .upload-text {
        font-size: 16px;
    }
    .upload-icon {
        font-size: 36px;
    }
    .upload-btn {
        padding: 8px 18px;
        font-size: 13px;
    }
    .file-row {
        flex-wrap: wrap;
    }
    .selection-counter {
        font-size: 12px;
    }
}

@media (max-width: 400px) {
    .thumbnails-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 8px;
        gap: 6px;
    }
    .thumbnail-item .page-number {
        font-size: 8px;
        padding: 1px 4px;
        bottom: 4px;
        right: 4px;
    }
    .thumbnail-item .selection-badge {
        width: 18px;
        height: 18px;
        font-size: 10px;
        top: 4px;
        left: 4px;
    }
}