:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg: #f8fafc;--card-bg: #ffffff;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--error: #ef4444;--success: #22c55e;--radius: 8px;--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.5;display:flex;justify-content:center;padding:2rem 1rem}#root{width:100%;max-width:500px}.app-container{background:var(--card-bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}header{margin-bottom:2rem;text-align:center}header h1{font-size:1.5rem;font-weight:700;color:var(--text)}.task-form{margin-bottom:1.5rem}.input-group{display:flex;gap:.5rem}input[type=text]{flex:1;padding:.625rem .875rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;outline:none;transition:border-color .2s}input[type=text]:focus{border-color:var(--primary)}.priority-select{padding:.625rem .5rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;background:#fff;outline:none}.priority-select:focus{border-color:var(--primary)}button{padding:.625rem 1rem;background-color:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-weight:600;font-size:.875rem;cursor:pointer;transition:background-color .2s}button:hover:not(:disabled){background-color:var(--primary-hover)}button:disabled{opacity:.5;cursor:not-allowed}.error-text{color:var(--error);font-size:.75rem;margin-top:.5rem}.filter-bar{display:flex;gap:.5rem;margin-bottom:1.5rem;justify-content:center}.filter-bar button{background:transparent;color:var(--text-muted);border:1px solid var(--border);padding:.375rem .75rem;font-size:.75rem}.filter-bar button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.task-list{list-style:none}.task-item{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0;border-bottom:1px solid var(--border)}.task-item:last-child{border-bottom:none}.task-content{display:flex;align-items:center;gap:.75rem}.task-content span.completed{text-decoration:line-through;color:var(--text-muted)}.priority-badge{font-size:.65rem;padding:.125rem .375rem;border-radius:4px;text-transform:uppercase;font-weight:700;letter-spacing:.025em}.priority-badge.low{background:#f1f5f9;color:#64748b}.priority-badge.medium{background:#fef9c3;color:#854d0e}.priority-badge.high{background:#fee2e2;color:#991b1b}.delete-btn{background:transparent;color:var(--error);padding:.25rem .5rem;font-size:.75rem;border:1px solid transparent}.delete-btn:hover{background:#fee2e2;border-radius:4px}.loading-spinner,.empty-state{text-align:center;padding:2rem 0;color:var(--text-muted);font-size:.875rem}.error-banner{background:#fef2f2;color:var(--error);padding:.75rem;border-radius:var(--radius);margin-bottom:1rem;font-size:.875rem;text-align:center}footer{margin-top:2rem;text-align:center;font-size:.75rem;color:var(--text-muted)}