*{box-sizing:border-box}:root{--color-bg:#f6f8fb;--color-surface:#fff;--color-surface-elevated:#fff;--color-border:#e2e8f0;--color-border-subtle:#eef2f6;--color-text:#0f172a;--color-text-secondary:#475569;--color-text-muted:#64748b;--color-primary:#6366f1;--color-primary-hover:#4f46e5;--color-primary-subtle:#eef2ff;--color-primary-ghost:#6366f10f;--color-accent:#06b6d4;--color-accent-subtle:#ecfeff;--color-danger:#ef4444;--color-danger-subtle:#fef2f2;--color-success:#10b981;--color-success-subtle:#ecfdf5;--color-warning:#f59e0b;--color-warning-subtle:#fffbeb;--radius-sm:10px;--radius-md:14px;--radius-lg:18px;--radius-xl:24px;--shadow-sm:0 1px 3px #0000000a, 0 1px 2px #00000005;--shadow-md:0 4px 16px #0000000f, 0 2px 4px #00000008;--shadow-lg:0 12px 48px #00000014, 0 4px 12px #0000000a;--shadow-xl:0 24px 64px #0000001a, 0 8px 24px #0000000f;--shadow-glow:0 0 24px #6366f126;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-normal:.25s cubic-bezier(.4, 0, .2, 1);--transition-spring:.35s cubic-bezier(.34, 1.56, .64, 1);color:var(--color-text);background:var(--color-bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;letter-spacing:-.011em;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5}[data-theme=dark]{--color-bg:#0f1219;--color-surface:#1a1f2e;--color-surface-elevated:#222838;--color-border:#2d3548;--color-border-subtle:#232a3a;--color-text:#e8ecf4;--color-text-secondary:#94a3b8;--color-text-muted:#8b9bb0;--color-primary:#818cf8;--color-primary-hover:#6366f1;--color-primary-subtle:#818cf81f;--color-primary-ghost:#818cf814;--color-accent:#22d3ee;--color-accent-subtle:#22d3ee1a;--color-danger:#f87171;--color-danger-subtle:#f871711a;--color-success:#34d399;--color-success-subtle:#34d3991a;--color-warning:#fbbf24;--color-warning-subtle:#fbbf241a;--shadow-sm:0 1px 3px #0003, 0 1px 2px #00000026;--shadow-md:0 4px 16px #00000040, 0 2px 4px #0003;--shadow-lg:0 12px 48px #00000059, 0 4px 12px #00000040;--shadow-xl:0 24px 64px #0006, 0 8px 24px #0000004d}[data-theme=dark] body{background:radial-gradient(ellipse at 20% -5%, #818cf80f 0%, transparent 50%), radial-gradient(ellipse at 80% 0%, #22d3ee0a 0%, transparent 40%), var(--color-bg)}[data-theme=dark] .app{background:var(--color-surface);border-color:var(--color-border)}[data-theme=dark] .app-header{border-bottom-color:var(--color-border);background:#1a1f2ee6}[data-theme=dark] button{background:linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%)}[data-theme=dark] button:hover:not(:disabled){background:linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-primary) 100%)}[data-theme=dark] button:disabled,[data-theme=dark] .secondary-btn:disabled,[data-theme=dark] .danger-secondary-btn:disabled{color:#8b9bb0;opacity:1;box-shadow:none;background:#1e293b;border-color:#2d3548;transform:none}[data-theme=dark] .secondary-btn{background:var(--color-surface-elevated);color:var(--color-text-secondary);border-color:var(--color-border)}[data-theme=dark] .secondary-btn:hover:not(:disabled){color:var(--color-text);background:#2d3548;border-color:#4a5568}[data-theme=dark] .icon-btn{color:var(--color-text-secondary);border-color:var(--color-border);background:0 0}[data-theme=dark] .icon-btn:disabled{color:var(--color-text-muted);opacity:.5;background:0 0}[data-theme=dark] .icon-btn:hover:not(:disabled){background:var(--color-primary-ghost);color:var(--color-primary);border-color:#818cf833}[data-theme=dark] .danger-secondary-btn{color:#f87171;background:#f8717114;border-color:#f871714d}[data-theme=dark] .danger-secondary-btn:hover:not(:disabled){color:#fff;background:var(--color-danger);border-color:var(--color-danger)}[data-theme=dark] .remove-btn{color:var(--color-danger);background:0 0;border-color:#f871714d}[data-theme=dark] .status.error{border-color:#f871714d}[data-theme=dark] .segmented-control button{color:var(--color-text-secondary);background:0 0}[data-theme=dark] .segmented-control button:disabled{color:var(--color-text-muted);opacity:.6;background:0 0}[data-theme=dark] .segmented-control button:hover:not(:disabled){background:var(--color-surface);color:var(--color-text)}[data-theme=dark] .segmented-control button.active{color:#fff;background:linear-gradient(135deg, var(--color-primary) 0%, #818cf8 100%)}[data-theme=dark] .quantity-stepper button{color:var(--color-text-secondary);background:0 0}[data-theme=dark] .quantity-stepper button:disabled{color:var(--color-text-muted);opacity:.5;background:0 0}[data-theme=dark] .quantity-stepper button:hover:not(:disabled){background:var(--color-border);color:var(--color-text)}[data-theme=dark] .theme-toggle-row{background:var(--color-bg);border-color:var(--color-border)}[data-theme=dark] .toggle-switch{background:#4a5568}[data-theme=dark] .toggle-switch[aria-checked=true]{background:var(--color-primary)}[data-theme=dark] input,[data-theme=dark] select{background:var(--color-surface-elevated);border-color:var(--color-border);color:var(--color-text)}[data-theme=dark] input::placeholder{color:#8b9bb0}[data-theme=dark] input:hover,[data-theme=dark] select:hover{background:#262d3f;border-color:#4a5568}[data-theme=dark] .list-picker{background:linear-gradient(170deg, var(--color-surface) 0%, var(--color-surface-elevated) 100%)}[data-theme=dark] .enhanced-add-form{background:var(--color-surface)}[data-theme=dark] .list-toolbar{background:var(--color-surface-elevated)}[data-theme=dark] .segmented-control{background:var(--color-surface-elevated);border-color:var(--color-border)}[data-theme=dark] .item-list li:hover{background:#818cf80a}[data-theme=dark] .no-items{background:linear-gradient(170deg,#818cf80a 0%,#22d3ee08 100%);border-color:#4a5568}[data-theme=dark] .category-badge{background:#818cf81f;border-color:#818cf833}[data-theme=dark] 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li{background:var(--color-surface-elevated);border-color:var(--color-border)}[data-theme=dark] .modal{background:var(--color-surface);border-color:var(--color-border)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#94a3b84d;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#94a3b880}::selection{color:var(--color-text);background:#6366f126}body{background:radial-gradient(ellipse at 20% -5%, #6366f114 0%, transparent 50%), radial-gradient(ellipse at 80% 0%, #06b6d40f 0%, transparent 40%), radial-gradient(ellipse at 50% 100%, #f43f5e08 0%, transparent 40%), var(--color-bg);min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}button{border-radius:var(--radius-sm);color:#fff;background:linear-gradient(135deg, var(--color-primary) 0%, #818cf8 100%);cursor:pointer;letter-spacing:-.01em;min-height:42px;transition:background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);border:0;padding:0 20px;font-weight:600}button:hover:not(:disabled){background:linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-primary) 100%);transform:translateY(-1px);box-shadow:0 4px 16px #6366f159}button:active:not(:disabled){transform:translateY(0)scale(.97);box-shadow:0 2px 8px #6366f133}button:disabled,.secondary-btn:disabled,.danger-secondary-btn:disabled{cursor:not-allowed;color:#475569;box-shadow:none;opacity:1;background:#e2e8f0;border:1px solid #e2e8f0;transform:none}input,select{border:1.5px solid var(--color-border);border-radius:var(--radius-sm);width:100%;min-width:0;min-height:44px;color:var(--color-text);background:var(--color-surface);text-overflow:ellipsis;transition:border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);padding:10px 16px}input:hover,select:hover{background:#fafbff;border-color:#c7d2fe}input:focus,select:focus,button:focus-visible{border-color:var(--color-primary);background:var(--color-surface);outline:none;box-shadow:0 0 0 3px #6366f11f,0 0 0 1px #6366f14d,0 1px 3px #0000000a}input::placeholder{color:#64748b}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.app{border-radius:var(--radius-xl);background:#fff;border:1px solid #6366f114;width:min(100%,1200px);min-height:min(600px,100vh - 64px);margin:32px auto;padding:36px;animation:.5s cubic-bezier(.4,0,.2,1) fadeInUp;box-shadow:inset 0 0 0 1px #fffc,0 1px 3px #0000000a,0 8px 32px #6366f10f;container-type:inline-size}.app-header{border-bottom:1px solid var(--color-border-subtle);border-radius:var(--radius-xl) var(--radius-xl) 0 0;-webkit-backdrop-filter:blur(12px);z-index:10;background:#ffffffd9;justify-content:space-between;align-items:center;gap:16px;margin:-36px -36px 28px;padding:20px 28px;display:flex;position:sticky;top:0}.app-header:after{content:"";background:linear-gradient(90deg, var(--color-primary), var(--color-accent), transparent);border-radius:999px;width:60px;height:3px;position:absolute;bottom:0;left:28px}h1{letter-spacing:-.04em;background:linear-gradient(135deg, var(--color-primary) 0%, #818cf8 50%, var(--color-accent) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;line-height:1.1}.header-subtitle{color:var(--color-text-secondary);margin:4px 0 0;font-size:.88rem}.header-actions{align-items:center;gap:6px;display:flex}.signed-in-user{max-width:200px;color:var(--color-text);text-overflow:ellipsis;white-space:nowrap;background:linear-gradient(135deg, var(--color-primary-subtle) 0%, var(--color-accent-subtle) 100%);border:1px solid #6366f126;border-radius:999px;padding:7px 14px;font-size:.82rem;font-weight:600;overflow:hidden}.sign-in-panel{text-align:center;border:1px solid var(--color-border);border-radius:var(--radius-xl);background:var(--color-surface);max-width:440px;box-shadow:var(--shadow-lg);transition:box-shadow var(--transition-normal), transform var(--transition-normal);justify-items:center;gap:16px;margin:40px auto;padding:48px 40px;display:grid;position:relative;overflow:hidden}.sign-in-panel:hover{box-shadow:var(--shadow-xl), 0 0 60px #6366f114;transform:translateY(-2px)}.sign-in-panel:before{content:"";background:linear-gradient(90deg, var(--color-primary), var(--color-accent), #f472b6);border-radius:var(--radius-xl) var(--radius-xl) 0 0;height:4px;position:absolute;top:0;left:0;right:0}.sign-in-panel:after{content:"";pointer-events:none;background:radial-gradient(circle,#06b6d40f 0%,#0000 70%);border-radius:50%;width:280px;height:280px;position:absolute;bottom:-120px;right:-120px}.sign-in-panel h2,.sign-in-panel p{margin:0;position:relative}.sign-in-panel h2{color:var(--color-text);letter-spacing:-.035em;margin-top:8px;font-size:1.5rem;font-weight:800;line-height:1.2}.sign-in-panel p{color:var(--color-text-secondary);max-width:320px;font-size:.9rem;line-height:1.6}.sign-in-panel button{border-radius:var(--radius-md);background:linear-gradient(135deg, var(--color-primary) 0%, #818cf8 100%);width:100%;min-height:50px;transition:background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);margin-top:8px;padding:0 32px;font-size:.95rem;position:relative;box-shadow:0 4px 14px #6366f140}.sign-in-panel button:hover:not(:disabled){background:linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-primary) 100%);transform:translateY(-3px);box-shadow:0 8px 32px #6366f166}.sign-in-panel button:active:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px #6366f14d}.item-count{min-height:32px;color:var(--color-primary);background:var(--color-primary-ghost);white-space:nowrap;border:1px solid #6366f11f;border-radius:999px;align-items:center;padding:0 12px;font-size:.85rem;font-weight:600;display:inline-flex}.status{border-radius:var(--radius-md);color:var(--color-text-secondary);background:var(--color-bg);text-align:center;border:1px solid var(--color-border-subtle);margin:0;padding:24px;font-size:.92rem}.status.error{color:var(--color-danger);background:var(--color-danger-subtle);border-color:#fecaca}.user-id-banner{border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);background:var(--color-bg);color:var(--color-text-muted);flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;padding:10px 14px;font-size:.82rem;display:flex}.user-id-banner code{overflow-wrap:anywhere;background:var(--color-surface);border:1px solid var(--color-border);max-width:100%;color:var(--color-text-secondary);border-radius:5px;padding:3px 7px;font-family:SF Mono,ui-monospace,monospace;font-size:.75rem}.copy-btn{border-radius:6px;min-height:28px;padding:0 10px;font-size:.75rem}.app-shell{grid-template-columns:minmax(260px,300px) minmax(0,1fr);align-items:start;gap:24px;display:grid}.list-sidebar{min-width:0;position:sticky;top:24px}.list-workspace{min-width:0}.sidebar-backdrop,.sidebar-mobile-header,.sidebar-toggle,.mobile-list-bar{display:none}.list-picker{border:1px solid var(--color-border);border-radius:var(--radius-md);background:linear-gradient(170deg, var(--color-surface) 0%, #f8faff 100%);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-normal), border-color 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10px;font-size:.75rem;font-weight:600;display:inline-flex}.create-list-form,.add-item-form,.list-manage-form{grid-template-columns:minmax(0,1fr) auto;gap:10px;margin-bottom:14px;display:grid}.list-manage-form input{min-height:38px;font-size:.88rem}.list-manage-form .secondary-btn,.list-manage-form .danger-secondary-btn{min-height:38px;font-size:.82rem}.share-panel{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-normal), border-color var(--transition-normal);gap:12px;margin-bottom:16px;padding:20px;display:grid;position:relative}.share-panel:before{content:"";border-radius:var(--radius-md) var(--radius-md) 0 0;background:linear-gradient(90deg, var(--color-primary), var(--color-accent));height:3px;position:absolute;top:0;left:0;right:0}.share-panel:hover{box-shadow:var(--shadow-md);border-color:#6366f126}.share-panel-header{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.share-panel-header div{gap:4px;display:grid}.share-panel-header span:first-child{color:var(--color-primary);text-transform:uppercase;letter-spacing:.08em;font-size:.68rem;font-weight:700}.share-panel-header strong{color:var(--color-text);letter-spacing:-.02em;font-size:1rem;font-weight:700}.friend-form{grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr) auto;align-items:start;gap:8px;display:grid}.friend-list{gap:8px;margin:0;padding:0;list-style:none;display:grid}.friend-list li{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);transition:border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;padding:14px 16px;display:grid}.friend-list li:hover{border-color:#6366f14d;transform:translateY(-1px);box-shadow:0 3px 12px #6366f114}.friend-copy{gap:4px;min-width:0;display:grid}.friend-copy strong{color:var(--color-text);font-size:.92rem;font-weight:600}.friend-copy code{overflow-wrap:anywhere;width:fit-content;max-width:100%;color:var(--color-primary);background:var(--color-primary-ghost);border:1px solid #6366f114;border-radius:6px;padding:3px 8px;font-size:.75rem}.friend-actions{align-items:center;gap:8px;display:flex}.list-picker .create-list-form,.list-picker .list-manage-form{margin-bottom:0}.list-manage-form{grid-template-columns:minmax(0,1fr)}.list-picker .secondary-btn,.list-picker .danger-secondary-btn{width:100%}.list-summary{grid-template-columns:repeat(3,minmax(72px,1fr)) minmax(140px,1.4fr);gap:10px;margin-bottom:20px;display:grid}.list-summary>div{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);min-height:72px;transition:border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);gap:4px;padding:14px 16px;display:grid}.list-summary>div:hover{border-color:#6366f140;transform:translateY(-2px);box-shadow:0 4px 16px #6366f114}.list-summary span{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.06em;font-size:.68rem;font-weight:600}.list-summary strong{color:var(--color-text);letter-spacing:-.04em;font-size:1.5rem;font-weight:800;line-height:1}.progress-wrap{place-content:center stretch}.progress-track{background:var(--color-border);border-radius:999px;width:100%;height:8px;position:relative;overflow:hidden}.progress-track:after{content:"";border-radius:inherit;background:linear-gradient(90deg,#0000 0%,#fff6 50%,#0000 100%);animation:2.5s infinite shimmer;position:absolute;inset:0}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-track div{border-radius:inherit;background:linear-gradient(90deg, var(--color-primary), var(--color-accent));height:100%;transition:width .6s cubic-bezier(.4,0,.2,1);position:relative;box-shadow:0 0 8px #6366f14d}.enhanced-add-form{border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-sm);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);grid-template-columns:minmax(180px,1fr) 80px minmax(120px,150px) auto;align-items:start;margin-bottom:16px;padding:14px 16px}.enhanced-add-form:focus-within{box-shadow:var(--shadow-md), 0 0 0 3px #6366f10d;border-color:#6366f14d}.quantity-input{text-align:center}.list-toolbar{border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);background:var(--color-bg);grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:10px;margin:0 0 16px;padding:10px 14px;display:grid}.toolbar-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.segmented-control{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);grid-template-columns:repeat(3,minmax(66px,1fr));gap:3px;padding:4px;display:inline-grid}.segmented-control button,.secondary-btn,.danger-secondary-btn{min-height:34px;color:var(--color-text-secondary);border-radius:var(--radius-sm);background:0 0;font-size:.84rem;font-weight:500}.segmented-control button:hover:not(:disabled),.secondary-btn:hover:not(:disabled){color:var(--color-text);background:var(--color-surface);box-shadow:var(--shadow-sm)}.segmented-control button.active{color:#fff;background:linear-gradient(135deg, var(--color-primary) 0%, #818cf8 100%);box-shadow:0 2px 8px #6366f140}.secondary-btn{border:1px solid var(--color-border);background:var(--color-surface);white-space:nowrap;transition:background var(--transition-fast), border-color 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