*{box-sizing:border-box}
:root{--bg:#f4f5fb;--card:#fff;--text:#1f2333;--muted:#8a90a6;--accent:#6366f1;--line:#eceef5;--done:#b5b9c9}
@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--card:#1a1d27;--text:#e7e9f1;--muted:#7d8399;--line:#262a37;--done:#5b6075}}
body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text)}
.app{max-width:620px;margin:0 auto;padding:56px 16px}
h1{margin:0;font-size:44px;letter-spacing:-.03em;background:linear-gradient(90deg,#6366f1,#ec4899);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin:4px 0 24px;color:var(--muted)}
.card{background:var(--card);border-radius:16px;box-shadow:0 10px 30px rgba(30,35,60,.08);overflow:hidden}
.new{display:flex;align-items:center;border-bottom:1px solid var(--line)}
.new input{flex:1;border:0;padding:18px 16px 18px 4px;font:inherit;font-size:18px;background:transparent;color:inherit;outline:none}
.toggle-all{width:52px;height:52px;border:0;background:none;color:var(--muted);font-size:18px;cursor:pointer;border-radius:8px}
.toggle-all.on{color:var(--accent)}
.list{list-style:none;margin:0;padding:0}
.item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);outline:none}
.item:focus-visible{background:rgba(99,102,241,.07)}
.item input[type=checkbox]{appearance:none;width:22px;height:22px;border:2px solid var(--line);border-radius:50%;cursor:pointer;flex:none;display:grid;place-items:center;transition:.15s}
.item input[type=checkbox]:checked{background:var(--accent);border-color:var(--accent)}
.item input[type=checkbox]:checked::after{content:"✓";color:#fff;font-size:13px}
.item input[type=checkbox]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.label{flex:1;word-break:break-word;cursor:text}
.done .label{color:var(--done);text-decoration:line-through}
.edit{flex:1;font:inherit;padding:6px 10px;border:1px solid var(--accent);border-radius:8px;background:transparent;color:inherit;outline:none}
.del{border:0;background:none;color:var(--muted);font-size:20px;cursor:pointer;opacity:0;transition:.15s;border-radius:6px;width:28px;height:28px}
.item:hover .del,.item:focus-within .del,.del:focus-visible{opacity:1}
.del:hover{color:#ef4444}
.footer{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 16px;color:var(--muted);font-size:14px;flex-wrap:wrap}
.filters{display:flex;gap:4px}
.filters a{color:inherit;text-decoration:none;padding:3px 10px;border-radius:999px}
.filters a.sel{background:rgba(99,102,241,.12);color:var(--accent)}
.clear{border:0;background:none;color:inherit;font:inherit;cursor:pointer}
.clear:hover{color:var(--text)}.clear[hidden],.footer[hidden]{display:none}
.hint{text-align:center;color:var(--muted);font-size:12px;margin-top:20px}
@media (max-width:480px){.app{padding:28px 10px}h1{font-size:34px}.footer{justify-content:center}.del{opacity:1}}