body{font-family:-apple-system,BlinkMacSystemFont,sans-serif;background:#f5f5f7;padding:18px;color:#222}
.card,.task,.score{background:#fff;padding:16px;border-radius:18px;margin:12px 0}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.task button{float:right;border:0;padding:8px 12px;border-radius:10px}
.done{opacity:.45;text-decoration:line-through}
nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
nav a{background:#fff;padding:12px;border-radius:12px;text-decoration:none;color:#222}