:root{--bg: #f4f6f8;--surface: #ffffff;--line: #e6ebf0;--text: #1f2a37;--muted: #6b7787;--accent: #0f766e;--accent-soft: #e6f4f2;--danger: #d14343;--high: #e05252;--high-bg: #fdeeee;--mid: #c47b04;--mid-bg: #fdf3e0;--low: #2f8f5b;--low-bg: #e9f6ee}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:system-ui,-apple-system,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text);background:radial-gradient(900px 500px at 10% -10%,#e8f3f1 0%,transparent 60%),radial-gradient(700px 400px at 100% 0%,#eef1f7 0%,transparent 55%),var(--bg)}.app{width:min(760px,100% - 32px);margin:0 auto;padding:56px 0 48px}.hero{margin-bottom:28px}.eyebrow{margin:0 0 10px;font-size:11px;letter-spacing:.22em;color:var(--accent);font-weight:600}.hero h1{margin:0;font-size:clamp(26px,5vw,34px);font-weight:700;letter-spacing:-.01em}.subtitle{margin:10px 0 0;font-size:14px;color:var(--muted)}.composer{display:flex;gap:10px;padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 30px #172a3a12}.task-input{flex:1 1 auto;min-width:0;padding:12px 14px;font-size:15px;color:var(--text);background:#f8fafb;border:1px solid transparent;border-radius:10px;outline:none;transition:border-color .15s ease,background .15s ease}.task-input::placeholder{color:#a3adba}.task-input:focus{background:#fff;border-color:#b9d7d3}.priority-select{flex:0 0 auto;padding:12px 10px;font-size:14px;color:var(--text);background:#f8fafb;border:1px solid transparent;border-radius:10px;outline:none;cursor:pointer}.priority-select:focus{border-color:#b9d7d3}.add-button{flex:0 0 auto;padding:12px 22px;font-size:15px;font-weight:600;color:#fff;background:var(--accent);border:none;border-radius:10px;cursor:pointer;transition:background .15s ease,transform .1s ease}.add-button:hover:not(:disabled){background:#0b645e}.add-button:active:not(:disabled){transform:translateY(1px)}.add-button:disabled{opacity:.6;cursor:default}.error-banner{margin-top:14px;padding:11px 14px;font-size:14px;color:#8d2b2b;background:#fdeeee;border:1px solid #f4d2d2;border-radius:10px}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:26px 2px 14px;flex-wrap:wrap}.filters{display:inline-flex;gap:4px;padding:4px;background:#eef2f5;border-radius:11px}.filter-chip{padding:7px 15px;font-size:13px;color:var(--muted);background:transparent;border:none;border-radius:8px;cursor:pointer;transition:background .15s ease,color .15s ease}.filter-chip:hover{color:var(--text)}.filter-chip.active{color:var(--accent);font-weight:600;background:var(--surface);box-shadow:0 1px 3px #172a3a14}.stats{margin:0;font-size:13px;color:var(--muted)}.task-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}.task-item{display:flex;align-items:center;gap:14px;padding:15px 16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.task-item:hover{transform:translateY(-1px);border-color:#dbe3ea;box-shadow:0 8px 22px #172a3a14}.task-item.done{background:#fbfcfd}.check-button{flex:0 0 auto;display:grid;place-items:center;width:26px;height:26px;padding:0;color:transparent;background:transparent;border:1.5px solid #cfd8e1;border-radius:50%;cursor:pointer;transition:border-color .15s ease,background .15s ease,color .15s ease}.check-button:hover:not(:disabled){border-color:var(--accent);color:#0f766e59}.task-item.done .check-button{color:#fff;background:var(--accent);border-color:var(--accent)}.check-button:disabled{opacity:.55;cursor:default}.check-icon{display:grid;place-items:center}.task-main{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;gap:7px}.task-title{font-size:15px;line-height:1.5;word-break:break-word}.task-item.done .task-title{color:#98a2b0;text-decoration:line-through;text-decoration-thickness:1px}.task-meta{display:flex;align-items:center;gap:8px}.tag{padding:2px 8px;font-size:11px;border-radius:6px;white-space:nowrap}.tag-high{color:var(--high);background:var(--high-bg)}.tag-mid{color:var(--mid);background:var(--mid-bg)}.tag-low{color:var(--low);background:var(--low-bg)}.status-text{font-size:11px;color:#97a1ae}.task-item.done .status-text{color:#a9b4c0}.delete-button{flex:0 0 auto;padding:7px 12px;font-size:13px;color:#9aa5b1;background:transparent;border:1px solid transparent;border-radius:8px;cursor:pointer;transition:color .15s ease,background .15s ease,border-color .15s ease}.delete-button:hover:not(:disabled){color:var(--danger);background:#fdf1f1;border-color:#f5dede}.delete-button:disabled{opacity:.5;cursor:default}.state-card{display:flex;flex-direction:column;gap:8px;padding:46px 24px;text-align:center;background:var(--surface);border:1px dashed #dde4eb;border-radius:16px}.state-title{font-size:15px;color:var(--text)}.state-hint{font-size:13px;color:var(--muted)}.footer{margin-top:34px;font-size:12px;line-height:1.7;color:#8b96a4;text-align:center}@media (max-width: 560px){.app{padding-top:34px}.composer{flex-direction:column}.task-input,.priority-select,.add-button{width:100%}.toolbar{flex-direction:column;align-items:flex-start;gap:10px}}