:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: #1e293b;--bg-hover: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #6366f1;--accent-hover: #818cf8;--accent-light: rgba(99, 102, 241, .1);--success: #22c55e;--success-light: rgba(34, 197, 94, .1);--error: #ef4444;--error-light: rgba(239, 68, 68, .1);--border: #334155;--radius: 12px;--radius-sm: 8px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .2);--transition: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;direction:rtl}body{font-family:Segoe UI,Tahoma,Noto Sans Arabic,Droid Arabic Kufi,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}.app{max-width:800px;margin:0 auto;padding:2rem 1rem;display:flex;flex-direction:column;gap:1.5rem;min-height:100vh}.header{text-align:center;padding:1rem 0 2rem}.header h1{font-size:2rem;font-weight:700;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-hover) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.subtitle{color:var(--text-secondary);font-size:1rem}.pwa-badge{display:inline-flex;align-items:center;gap:.5rem;background:var(--success-light);color:var(--success);padding:.5rem 1rem;border-radius:20px;font-size:.875rem;margin-top:1rem}.pwa-badge .badge-dot{width:8px;height:8px;background:var(--success);border-radius:50%;animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.hidden{display:none!important}.card{background:var(--bg-card);border-radius:var(--radius);padding:1.5rem;border:1px solid var(--border);box-shadow:var(--shadow)}.card-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.card-header h2{font-size:1.125rem;font-weight:600}.step-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--accent);color:#fff;border-radius:50%;font-size:.875rem;font-weight:600}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:2.5rem 1.5rem;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--bg-primary)}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent);background:var(--accent-light)}.drop-zone-small{padding:1.5rem}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:.75rem}.drop-icon{width:48px;height:48px;color:var(--text-muted);transition:color var(--transition)}.drop-zone:hover .drop-icon{color:var(--accent)}.drop-zone p{color:var(--text-secondary);font-size:1rem}.drop-hint{color:var(--text-muted)!important;font-size:.875rem!important}.file-info{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg-primary);border-radius:var(--radius-sm);margin-top:1rem;flex-wrap:wrap}.file-name{font-weight:500;color:var(--text-primary);flex:1;min-width:150px;word-break:break-all}.file-pages,.file-duration{color:var(--text-secondary);font-size:.875rem}.btn-remove{background:var(--error-light);color:var(--error);border:none;padding:.5rem 1rem;border-radius:var(--radius-sm);cursor:pointer;font-size:.875rem;transition:all var(--transition)}.btn-remove:hover{background:var(--error);color:#fff}.preview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1rem;max-height:300px;overflow-y:auto;padding:.5rem}.preview-item{position:relative;aspect-ratio:4/3;border-radius:var(--radius-sm);overflow:hidden;border:2px solid transparent;transition:border-color var(--transition)}.preview-item:hover{border-color:var(--accent)}.preview-item img{width:100%;height:100%;object-fit:cover}.preview-number{position:absolute;bottom:4px;right:4px;background:#000000b3;color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}.page-count{color:var(--text-secondary);font-size:.875rem;margin-right:auto}.options{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:1rem}.checkbox-label{display:flex;align-items:center;gap:.75rem;cursor:pointer;color:var(--text-secondary)}.checkbox-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}.volume-control{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.volume-control label{color:var(--text-secondary);min-width:100px}.volume-control input[type=range]{flex:1;min-width:150px;height:6px;background:var(--bg-primary);border-radius:3px;accent-color:var(--accent)}#volume-value{color:var(--accent);font-weight:500;min-width:50px;text-align:left}.settings-grid{display:grid;gap:1.25rem}.setting-item{display:flex;flex-direction:column;gap:.5rem}.setting-item>label{color:var(--text-secondary);font-size:.9375rem}.setting-hint{color:var(--text-muted);font-size:.8125rem}.input-with-btns{display:flex;align-items:center;gap:.5rem}.input-with-btns input{width:80px;text-align:center;padding:.625rem;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem}.btn-adjust{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1.25rem;cursor:pointer;transition:all var(--transition)}.btn-adjust:hover{background:var(--accent);border-color:var(--accent)}select{padding:.625rem 1rem;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem;cursor:pointer}select:focus{outline:none;border-color:var(--accent)}.btn-convert{display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;padding:1rem 2rem;background:linear-gradient(135deg,var(--accent) 0%,#8b5cf6 100%);color:#fff;border:none;border-radius:var(--radius);font-size:1.125rem;font-weight:600;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 15px #6366f14d}.btn-convert:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #6366f166}.btn-convert:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-icon{width:24px;height:24px}.progress-container{margin-bottom:1.5rem}.progress-bar{height:8px;background:var(--bg-primary);border-radius:4px;overflow:hidden;margin-bottom:.75rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent) 0%,#8b5cf6 100%);border-radius:4px;transition:width .3s ease;width:0%}.progress-info{display:flex;justify-content:space-between;color:var(--text-secondary);font-size:.875rem}.progress-steps{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}.progress-step{display:flex;align-items:center;gap:.5rem;padding:.75rem;background:var(--bg-primary);border-radius:var(--radius-sm);font-size:.875rem;color:var(--text-secondary)}.progress-step.active{background:var(--accent-light);color:var(--accent)}.progress-step.done{background:var(--success-light);color:var(--success)}.step-icon{font-size:1rem}.card-header.success{color:var(--success)}.success-icon,.error-icon{width:32px;height:32px}.download-info{display:flex;gap:2rem;margin-bottom:1.5rem;color:var(--text-secondary);font-size:.9375rem}.btn-download{display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;padding:1rem 2rem;background:var(--success);color:#fff;border:none;border-radius:var(--radius);font-size:1.125rem;font-weight:600;cursor:pointer;transition:all var(--transition);margin-bottom:1rem}.btn-download:hover{background:#16a34a}.btn-new{width:100%;padding:.875rem;background:transparent;color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:all var(--transition)}.btn-new:hover{background:var(--bg-hover);color:var(--text-primary)}.card-header.error{color:var(--error)}.error-message{color:var(--text-secondary);margin-bottom:1.5rem;padding:1rem;background:var(--error-light);border-radius:var(--radius-sm)}.btn-retry{width:100%;padding:.875rem;background:var(--error);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:all var(--transition)}.btn-retry:hover{opacity:.9}.footer{text-align:center;padding:1rem;color:var(--text-muted);font-size:.875rem;margin-top:auto}@media(max-width:600px){.app{padding:1rem .75rem}.header h1{font-size:1.5rem}.card{padding:1rem}.drop-zone{padding:1.5rem 1rem}.preview-grid{grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:.5rem}.progress-steps{grid-template-columns:1fr}.download-info{flex-direction:column;gap:.5rem}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary);border-radius:4px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}input:focus,select:focus,button:focus{outline:2px solid var(--accent);outline-offset:2px}.btn-convert.loading{position:relative;color:transparent}.btn-convert.loading:after{content:"";position:absolute;width:24px;height:24px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}