*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f5f5;min-height:100vh}.app{max-width:800px;margin:0 auto;padding:20px}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding:20px;background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a}.header h1{color:#333}.btn{padding:10px 20px;border:none;border-radius:6px;cursor:pointer;font-size:14px;transition:opacity .2s}.btn:hover{opacity:.8}.btn-primary{background:#4a90d9;color:#fff}.btn-success{background:#5cb85c;color:#fff}.btn-warning{background:#f0ad4e;color:#fff}.btn-danger{background:#d9534f;color:#fff}.btn-secondary{background:#6c757d;color:#fff}.login-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh}.login-container h1{margin-bottom:30px;color:#333}.login-container .btn{padding:15px 40px;font-size:18px}.todo-form{background:#fff;padding:20px;border-radius:8px;margin-bottom:20px;box-shadow:0 2px 4px #0000001a}.todo-form input,.todo-form textarea{width:100%;padding:10px;margin-bottom:10px;border:1px solid #ddd;border-radius:4px;font-size:14px}.todo-form textarea{resize:vertical;min-height:60px}.todo-list{display:flex;flex-direction:column;gap:10px}.todo-item{background:#fff;padding:15px 20px;border-radius:8px;box-shadow:0 2px 4px #0000001a;display:flex;justify-content:space-between;align-items:center}.todo-item.completed{opacity:.7;background:#e8f5e9}.todo-item.delayed{background:#fff3e0}.todo-item.abandoned{background:#ffebee}.todo-item.overdue{background:#f3e5f5;border-left:4px solid #9c27b0}.todo-content{flex:1}.todo-content h3{margin-bottom:5px;color:#333}.todo-content p{color:#666;font-size:14px}.todo-content .status{display:inline-block;padding:2px 8px;border-radius:4px;font-size:12px;margin-top:5px}.status.pending{background:#e3f2fd;color:#1976d2}.status.completed{background:#c8e6c9;color:#388e3c}.status.delayed{background:#ffe0b2;color:#f57c00}.status.abandoned{background:#ffcdd2;color:#d32f2f}.status.overdue{background:#e1bee7;color:#7b1fa2}.todo-actions{display:flex;gap:5px}.todo-actions button{padding:6px 12px;font-size:12px}.filters{display:flex;gap:10px;margin-bottom:20px}.filter-btn{padding:8px 16px;background:#fff;border:1px solid #ddd;border-radius:20px;cursor:pointer}.filter-btn.active{background:#4a90d9;color:#fff;border-color:#4a90d9}.admin-panel{margin-top:20px}.admin-panel h2{margin-bottom:20px}.user-section{background:#fff;padding:15px;border-radius:8px;margin-bottom:15px}.user-section h4{color:#666;margin-bottom:10px}