*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f172a;--surface: #1e293b;--surface-hover: #334155;--border: #334155;--text: #f1f5f9;--text-muted: #94a3b8;--primary: #6366f1;--primary-hover: #818cf8;--danger: #ef4444;--danger-hover: #f87171;--success: #22c55e;--warning: #f59e0b;--high: #ef4444;--medium: #f59e0b;--low: #22c55e;--radius: 12px;--radius-sm: 8px;--shadow: 0 4px 24px rgba(0,0,0,.3)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5}.app{max-width:720px;margin:0 auto;padding:40px 20px}.app-header{text-align:center;margin-bottom:40px}.app-header h1{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,#6366f1,#a78bfa,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.app-header p{color:var(--text-muted);font-size:1rem}.stats-bar{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap}.stat-card{flex:1;min-width:100px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center}.stat-card .number{font-size:1.75rem;font-weight:700}.stat-card .label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:4px}.stat-card.total .number{color:var(--primary)}.stat-card.active .number{color:var(--warning)}.stat-card.done .number{color:var(--success)}.add-form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;box-shadow:var(--shadow)}.add-form h2{font-size:1.1rem;font-weight:600;margin-bottom:16px;color:var(--text)}.form-row{display:flex;gap:12px;margin-bottom:12px}.form-row:last-child{margin-bottom:0}.form-row input,.form-row select{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text);font-size:.9rem;font-family:inherit;transition:border-color .2s}.form-row input:focus,.form-row select:focus{outline:none;border-color:var(--primary)}.form-row input::placeholder{color:var(--text-muted)}.form-row select{cursor:pointer;min-width:120px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-danger{background:transparent;color:var(--danger);padding:6px 10px}.btn-danger:hover{background:rgba(239,68,68,.15)}.btn-full{width:100%}.filters{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap;align-items:center}.filter-btn{padding:6px 14px;border:1px solid var(--border);border-radius:20px;background:transparent;color:var(--text-muted);font-size:.8rem;font-weight:500;font-family:inherit;cursor:pointer;transition:all .2s}.filter-btn:hover{border-color:var(--primary);color:var(--text)}.filter-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.filter-group{display:flex;gap:4px;margin-left:auto}.todo-list{display:flex;flex-direction:column;gap:8px}.todo-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;display:flex;align-items:flex-start;gap:14px;transition:all .2s;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.todo-item:hover{border-color:var(--surface-hover);background:var(--surface-hover)}.todo-item.completed{opacity:.6}.todo-item.completed .todo-title{text-decoration:line-through;color:var(--text-muted)}.todo-checkbox{width:22px;height:22px;border:2px solid var(--border);border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px;transition:all .2s;background:transparent;color:transparent}.todo-checkbox:hover{border-color:var(--primary)}.todo-checkbox.checked{background:var(--success);border-color:var(--success);color:#fff}.todo-content{flex:1;min-width:0}.todo-title{font-weight:500;font-size:.95rem;margin-bottom:4px;word-break:break-word}.todo-description{color:var(--text-muted);font-size:.8rem;margin-bottom:8px;word-break:break-word}.todo-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.badge{font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:10px;text-transform:uppercase;letter-spacing:.03em}.badge-high{background:rgba(239,68,68,.15);color:var(--high)}.badge-medium{background:rgba(245,158,11,.15);color:var(--medium)}.badge-low{background:rgba(34,197,94,.15);color:var(--low)}.badge-category{background:rgba(99,102,241,.15);color:var(--primary-hover)}.badge-date{background:rgba(148,163,184,.1);color:var(--text-muted)}.badge-overdue{background:rgba(239,68,68,.15);color:var(--danger)}.todo-actions{display:flex;gap:4px;flex-shrink:0}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state .icon{font-size:3rem;margin-bottom:16px}.empty-state h3{font-size:1.1rem;margin-bottom:8px;color:var(--text)}.loading{text-align:center;padding:40px;color:var(--text-muted)}.spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 600px){.app{padding:20px 12px}.app-header h1{font-size:1.8rem}.form-row{flex-direction:column}.stats-bar{gap:8px}.stat-card{padding:12px 8px}.stat-card .number{font-size:1.4rem}.filter-group{margin-left:0;margin-top:8px;width:100%}.filters{flex-direction:column;align-items:flex-start}}