*{box-sizing:border-box;margin:0;padding:0}body{background-color:#f8fafc;color:#0f172a;font-family:system-ui,"-apple-system," BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;min-height:100vh;display:flex;justify-content:center;padding:40px 20px}.container{width:100%;max-width:600px;display:flex;flex-direction:column;gap:20px}.header{text-align:center}.header h1{font-size:2.25rem;font-weight:700;margin-bottom:6px}.subtitle{color:#64748b;font-size:.9rem}.task-form{display:flex;gap:10px}.task-input{flex:1;background:#fff;border:1px solid #cbd5e1;color:#0f172a;padding:12px 16px;border-radius:10px;font-size:1rem;outline:none;transition:border-color .2s,box-shadow .2s}.task-input:focus{border-color:#0284c7;box-shadow:0 0 0 3px #0284c726}.add-btn{background:#0284c7;color:#fff;border:none;padding:12px 20px;border-radius:10px;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .2s,transform .1s}.add-btn:hover{background:#0369a1}.add-btn:active{transform:scale(.98)}.toolbar{display:flex;flex-direction:column;gap:10px}@media(min-width:480px){.toolbar{flex-direction:row;align-items:center;justify-content:space-between}}.search-input{background:#fff;border:1px solid #cbd5e1;color:#0f172a;padding:8px 14px;border-radius:8px;font-size:.9rem;outline:none;flex:1}.search-input:focus{border-color:#0284c7}.filter-group{display:flex;background:#f1f5f9;border:1px solid #cbd5e1;border-radius:8px;padding:3px;gap:2px}.filter-btn{background:transparent;border:none;color:#64748b;padding:6px 12px;border-radius:6px;font-size:.85rem;font-weight:500;cursor:pointer;transition:all .2s}.filter-btn:hover{color:#0f172a}.filter-btn.active{background:#fff;color:#0284c7;font-weight:600;box-shadow:0 1px 3px #0000000d}.error-banner{background:#fef2f2;border:1px solid #fca5a5;color:#b91c1c;padding:12px 16px;border-radius:8px;font-size:.9rem;text-align:center}.task-list-card{background:#fff;border:1px solid #cbd5e1;border-radius:14px;overflow:hidden;box-shadow:0 10px 25px -5px #0000000d}.loading,.empty-state{padding:40px 20px;text-align:center;color:#64748b;font-size:.95rem}.task-list{list-style:none}.task-item{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid #f1f5f9;transition:background .15s}.task-item:last-child{border-bottom:none}.task-item:hover{background:#f8fafc}.checkbox-container{display:flex;align-items:center;cursor:pointer;position:relative}.checkbox-container input{opacity:0;position:absolute;cursor:pointer}.checkmark{width:20px;height:20px;border:2px solid #94a3b8;border-radius:6px;display:inline-block;transition:all .2s}.checkbox-container input:checked~.checkmark{background-color:#10b981;border-color:#10b981}.checkmark:after{content:"";position:absolute;display:none;left:7px;top:3px;width:4px;height:9px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg)}.checkbox-container input:checked~.checkmark:after{display:block}.task-title{flex:1;font-size:.95rem;color:#0f172a;word-break:break-word;cursor:pointer}.task-item.completed .task-title{text-decoration:line-through;color:#94a3b8}.edit-form{flex:1}.edit-input{width:100%;background:#f8fafc;border:1px solid #0284c7;color:#0f172a;padding:6px 10px;border-radius:6px;font-size:.95rem;outline:none}.action-buttons{display:flex;gap:4px}.edit-btn,.delete-btn{background:transparent;border:none;color:#94a3b8;font-size:.95rem;cursor:pointer;padding:4px 8px;border-radius:6px;transition:all .2s}.edit-btn:hover{color:#0284c7;background:#0284c71a}.delete-btn:hover{color:#ef4444;background:#ef44441a}.footer{display:flex;justify-content:space-between;align-items:center;color:#64748b;font-size:.85rem;padding:0 4px}.clear-btn{background:transparent;border:none;color:#dc2626;font-size:.85rem;cursor:pointer;text-decoration:underline;transition:color .2s}.clear-btn:hover{color:#b91c1c}