*,*:before,*:after{box-sizing:border-box}:root{font-family:system-ui,-apple-system,Segoe UI,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}body{margin:0;background:#f5f5f5;color:#1a1a2e}button{font-family:inherit}.app{min-height:100vh;background:#f5f5f5;padding:2rem 1rem}.app-header{text-align:center;margin-bottom:2rem}.app-header h1{font-size:2.2rem;font-weight:700;color:#1a1a2e;margin:0 0 .25rem}.subtitle{color:#666;margin:0;font-size:.95rem}.app-main{max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}.add-form{background:#fff;border-radius:12px;padding:1rem;box-shadow:0 2px 8px #00000014;display:flex;flex-direction:column;gap:.75rem}.text-input{width:100%;padding:.75rem 1rem;font-size:1rem;border:1.5px solid #e0e0e0;border-radius:8px;outline:none;box-sizing:border-box;transition:border-color .2s;font-family:inherit}.text-input:focus{border-color:#6366f1}.form-row{display:flex;gap:.5rem;flex-wrap:wrap}.priority-select,.date-input{flex:1;min-width:120px;padding:.6rem .75rem;font-size:.875rem;border:1.5px solid #e0e0e0;border-radius:8px;outline:none;background:#fff;font-family:inherit;cursor:pointer;transition:border-color .2s}.priority-select:focus,.date-input:focus{border-color:#6366f1}.add-btn{padding:.6rem 1.25rem;background:#6366f1;color:#fff;border:none;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;transition:background .2s;white-space:nowrap}.add-btn:hover{background:#4f46e5}.filter-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem}.filter-tabs{display:flex;gap:.25rem;background:#fff;border-radius:8px;padding:.25rem;box-shadow:0 1px 4px #0000000f}.filter-tab{padding:.4rem .9rem;border:none;background:transparent;border-radius:6px;font-size:.875rem;font-weight:500;color:#666;cursor:pointer;transition:background .15s,color .15s}.filter-tab.active{background:#6366f1;color:#fff}.task-count{font-size:.8rem;color:#999}.todo-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.5rem}.todo-item{display:flex;align-items:center;gap:.75rem;background:#fff;border-radius:10px;padding:.85rem 1rem;box-shadow:0 1px 4px #0000000f;border-left:4px solid transparent;transition:opacity .2s}.todo-item.priority-high{border-left-color:#ef4444}.todo-item.priority-medium{border-left-color:#f59e0b}.todo-item.priority-low{border-left-color:#22c55e}.todo-item.completed{opacity:.55}.check-btn{width:22px;height:22px;min-width:22px;border-radius:50%;border:2px solid #d1d5db;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:border-color .2s,background .2s}.check-btn:hover{border-color:#6366f1}.check-btn.checked{background:#6366f1;border-color:#6366f1;color:#fff}.check-btn svg{width:10px;height:10px}.todo-content{flex:1;min-width:0}.todo-text{display:block;font-size:.95rem;color:#1a1a2e;word-break:break-word}.todo-item.completed .todo-text{text-decoration:line-through;color:#999}.todo-meta{display:flex;align-items:center;gap:.5rem;margin-top:.3rem;flex-wrap:wrap}.priority-badge{font-size:.7rem;font-weight:700;padding:.15rem .45rem;border-radius:4px;text-transform:uppercase;letter-spacing:.04em}.priority-badge.priority-high{background:#fee2e2;color:#dc2626}.priority-badge.priority-medium{background:#fef3c7;color:#d97706}.priority-badge.priority-low{background:#dcfce7;color:#16a34a}.due-date{font-size:.78rem;color:#888}.due-date.overdue{color:#ef4444;font-weight:600}.delete-btn{background:transparent;border:none;color:#ccc;font-size:.8rem;cursor:pointer;padding:.25rem;border-radius:4px;line-height:1;transition:color .15s}.delete-btn:hover{color:#ef4444}.empty-state{text-align:center;padding:3rem 1rem;color:#aaa;font-size:.95rem;background:#fff;border-radius:10px;box-shadow:0 1px 4px #0000000f}