:root{--primary:#0d6e4f;--primary-dark:#084b36;--accent:#f2a93b;--background:#f7f8fa;--surface:#fff;--error:#d64545;--success:#2e9e5b;--text-primary:#1c1f24;--text-secondary:#6b7280;--border:#e2e5e9;color:var(--text-primary);font-family:Segoe UI,Tahoma,Noto Naskh Arabic,Arial,sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{background:var(--background);overscroll-behavior-y:none;margin:0;padding:0}#root{min-height:100vh}.app-shell{max-width:560px;min-height:100vh;padding-bottom:calc(72px + env(safe-area-inset-bottom));margin:0 auto}.topbar{display:none}.appbar{z-index:10;background:var(--surface);border-bottom:1px solid var(--border);padding:calc(12px + env(safe-area-inset-top)) 16px 12px;align-items:center;gap:10px;display:flex;position:sticky;top:0}.appbar h1{margin:0;font-size:17px;font-weight:700}.appbar .back{cursor:pointer;color:var(--text-primary);background:0 0;border:none;padding:0 4px;font-size:22px;line-height:1}.page{padding:16px}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);max-width:560px;padding-bottom:env(safe-area-inset-bottom);z-index:20;margin:0 auto;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav a{text-align:center;color:var(--text-secondary);flex-direction:column;flex:1;align-items:center;gap:3px;padding:10px 4px;font-size:11.5px;text-decoration:none;display:flex}.bottom-nav a.active{color:var(--primary);font-weight:700}.bottom-nav .icon{font-size:20px;line-height:1}@media (width>=900px){.app-shell{max-width:1080px;padding-bottom:40px}.bottom-nav{display:none}.topbar{background:var(--surface);border-bottom:1px solid var(--border);z-index:20;align-items:center;gap:22px;margin-bottom:8px;padding:14px 24px;display:flex;position:sticky;top:0}.topbar .brand{color:var(--primary);white-space:nowrap;font-size:19px;font-weight:700;text-decoration:none}.topbar nav{flex:1;gap:6px;display:flex}.topbar nav a{color:var(--text-secondary);border-radius:10px;padding:8px 14px;font-size:14.5px;text-decoration:none}.topbar nav a:hover{background:var(--background)}.topbar nav a.active{color:var(--primary);background:#0d6e4f14;font-weight:700}.appbar{background:0 0;border:none;padding:18px 24px 0;position:static}.appbar h1{font-size:24px}.page{padding:16px 24px 40px}.product-grid{grid-template-columns:repeat(4,1fr)}.form-narrow{max-width:480px}}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:12px;padding:16px}.btn{cursor:pointer;border:none;border-radius:12px;width:100%;padding:14px;font-family:inherit;font-size:15px;font-weight:700;display:block}.btn:disabled{opacity:.6}.btn-primary{background:var(--primary);color:#fff}.btn-outline{color:var(--primary);border:1.5px solid var(--primary);background:0 0}.btn-sm{padding:10px;font-size:13.5px}.form-group{margin-bottom:14px}.form-group label{margin-bottom:6px;font-size:13.5px;font-weight:600;display:block}.form-control{border:1px solid var(--border);background:var(--surface);border-radius:12px;width:100%;padding:13px 14px;font-family:inherit;font-size:16px}.form-control:focus{border-color:var(--primary);outline:none}.error-text{color:var(--error);margin-bottom:10px;font-size:13px}.muted{color:var(--text-secondary);font-size:13px}.product-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.price{color:var(--primary);font-size:16px;font-weight:700}.price-old{color:var(--text-secondary);font-size:12px;text-decoration:line-through}.badge{border-radius:20px;padding:3px 10px;font-size:11.5px;font-weight:700;display:inline-block}.badge-green{color:#2e7d32;background:#e8f5e9}.badge-gray{color:#546e7a;background:#eceff1}.hero{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;border:none}.spinner{border:2px solid #fff6;border-top-color:#fff;border-radius:50%;width:20px;height:20px;margin:0 auto;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.center-page{flex-direction:column;justify-content:center;max-width:420px;min-height:100vh;margin:0 auto;padding:24px;display:flex}.progress-track{background:var(--border);border-radius:8px;height:8px;margin:8px 0;overflow:hidden}.progress-fill{background:var(--primary);height:100%}