*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,sans-serif;background:#f8fafc;color:#1e293b;min-height:100vh;display:flex;justify-content:center;padding:2rem 1rem}#app{width:100%;max-width:520px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}h1{font-size:2rem;font-weight:700;color:#6366f1}#controls{display:flex;align-items:center;gap:.75rem}.status{font-size:1.1rem;transition:color .3s}.status.online{color:#22c55e}.status.offline{color:#94a3b8}.status.connecting{color:#f59e0b;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}button{cursor:pointer;border:none;border-radius:6px;padding:.4rem .9rem;font-size:.9rem;background:#6366f1;color:#fff;transition:background .2s}button:hover{background:#4f46e5}#add-form{display:flex;gap:.5rem;margin-bottom:1rem}#new-todo{flex:1;padding:.5rem .75rem;border:1.5px solid #e2e8f0;border-radius:6px;font-size:1rem;outline:none;transition:border-color .2s}#new-todo:focus{border-color:#6366f1}#filters{display:flex;gap:.5rem;margin-bottom:1rem}.filter{background:transparent;color:#64748b;border:1.5px solid #e2e8f0}.filter:hover{background:#f1f5f9}.filter.active{background:#6366f1;color:#fff;border-color:#6366f1}#todo-list{list-style:none;display:flex;flex-direction:column;gap:.4rem}.todo-item{display:flex;align-items:center;gap:.5rem;background:#fff;border:1.5px solid #e2e8f0;border-radius:8px;padding:.5rem .75rem}.todo-item input[type=checkbox]{width:1.1rem;height:1.1rem;cursor:pointer;accent-color:#6366f1}.todo-text{flex:1;font-size:1rem;border:none;outline:none;background:transparent;color:#1e293b}.todo-text.done{text-decoration:line-through;color:#94a3b8}.move-btn,.del-btn{background:transparent;color:#94a3b8;padding:.2rem .4rem;font-size:.85rem}.move-btn:hover{color:#6366f1;background:transparent}.del-btn:hover{color:#ef4444;background:transparent}#empty-msg{color:#94a3b8;text-align:center;margin-top:2rem}#share-toast{position:fixed;bottom:1.5rem;left:50%;transform:translate(-50%);background:#1e293b;color:#fff;padding:.5rem 1.2rem;border-radius:999px;font-size:.9rem;opacity:0;transition:opacity .3s;pointer-events:none}#share-toast.show{opacity:1}#update-banner{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:1rem;background:#1f2937;color:#fff;padding:.75rem;z-index:100}#update-banner button{background:#3b82f6;color:#fff;border:none;border-radius:6px;padding:.4rem 1rem;font-size:1rem}