:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app{max-width:800px;margin:0 auto;padding:2rem}h1{color:#646cff;margin-bottom:.5rem}.subtitle{color:#888;font-size:.9rem;margin-bottom:2rem}.error{background-color:#f44;color:#fff;padding:1rem;border-radius:8px;margin-bottom:1rem}.task-form{display:flex;gap:.5rem;margin-bottom:2rem}.task-input{flex:1;padding:.75rem;border:2px solid #646cff;border-radius:8px;font-size:1rem;background:transparent;color:inherit}.task-input:focus{outline:none;border-color:#747bff}.btn-primary{padding:.75rem 1.5rem;background-color:#646cff;color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:background-color .2s}.btn-primary:hover{background-color:#747bff}.task-list{display:flex;flex-direction:column;gap:.75rem}.task-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:#ffffff0d;border-radius:8px;transition:background-color .2s}.task-item:hover{background:#ffffff14}.task-item input[type=checkbox]{width:20px;height:20px;cursor:pointer}.task-item span{flex:1;text-align:left;font-size:1rem}.task-item span.completed{text-decoration:line-through;opacity:.6}.btn-delete{padding:.5rem 1rem;background-color:#f44;color:#fff;border:none;border-radius:6px;font-size:.9rem;cursor:pointer;transition:background-color .2s}.btn-delete:hover{background-color:#f66}.empty-state{color:#888;font-style:italic;padding:2rem}