:root{--primary: #4f46e5;--primary-light: #818cf8;--bg: #f9fafb;--card: #ffffff;--text: #111827;--text-muted: #6b7280;--border: #e5e7eb;--danger: #ef4444;--success: #22c55e;--warning: #f59e0b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.app{max-width:480px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}.nav{display:flex;justify-content:space-around;background:var(--card);border-top:1px solid var(--border);padding:8px 0 env(safe-area-inset-bottom,8px);position:fixed;bottom:0;left:0;right:0;max-width:480px;margin:0 auto;z-index:10}.nav a{text-decoration:none;color:var(--text-muted);font-size:12px;text-align:center;padding:4px 8px}.nav a.active{color:var(--primary);font-weight:600}.page{flex:1;padding:16px;padding-bottom:calc(80px + env(safe-area-inset-bottom,0px))}.page-title{font-size:20px;font-weight:700;margin-bottom:16px}.card{background:var(--card);border-radius:12px;padding:16px;margin-bottom:12px;box-shadow:0 1px 3px #0000000f}.card-alert{border-left:4px solid var(--warning)}.form-group{margin-bottom:12px}.form-group label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:4px}.form-group input,.form-group select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:16px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:8px;font-size:15px;font-weight:600;border:none;cursor:pointer;width:100%}.btn-primary{background:var(--primary);color:#fff}.btn-primary:disabled{opacity:.5}.btn-danger{background:var(--danger);color:#fff}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-sm{padding:6px 12px;font-size:13px;width:auto}.item-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border)}.item-row:last-child{border-bottom:none}.item-name{font-weight:500}.item-stock{font-size:14px;color:var(--text-muted)}.stock-zero{color:var(--danger);font-weight:600}.stock-controls{display:flex;gap:8px;align-items:center}.stock-controls button{width:32px;height:32px;border-radius:50%;border:1px solid var(--border);background:var(--card);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center}.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:600}.badge-warning{background:#fef3c7;color:#92400e}.badge-success{background:#dcfce7;color:#166534}.status-empty{background:#fee2e2;color:#991b1b}.status-low{background:#fef3c7;color:#92400e}.status-ok{background:#dcfce7;color:#166534}.status-plenty{background:#dbeafe;color:#1e40af}.upload-area{border:2px dashed var(--border);border-radius:12px;padding:32px;text-align:center;cursor:pointer}.upload-area:hover{border-color:var(--primary)}.tabs{display:flex;gap:8px;margin-bottom:16px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px}.tabs::-webkit-scrollbar{display:none}.tab{padding:8px 16px;border-radius:20px;font-size:13px;border:1px solid var(--border);background:var(--card);cursor:pointer;white-space:nowrap;flex-shrink:0}.tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.error{color:var(--danger);font-size:13px;margin-top:4px}.loading{text-align:center;padding:32px;color:var(--text-muted)}.loading-overlay{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px}.loading-spinner{width:48px;height:48px;border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:16px}.loading-bar{width:200px;height:6px;background:var(--border);border-radius:3px;overflow:hidden;margin-bottom:12px}.loading-bar-inner{height:100%;background:var(--primary);border-radius:3px;animation:loading-progress 8s ease-out forwards}.loading-text{font-size:14px;color:var(--text-muted)}.loading-sub{font-size:12px;color:var(--text-muted);margin-top:4px;animation:pulse 1.5s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes loading-progress{0%{width:0%}15%{width:30%}40%{width:55%}60%{width:70%}80%{width:85%}to{width:95%}}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}