* { box-sizing: border-box; }
body { font-family: Arial, sans-serif; background: #f2f4f8; margin: 0; }
.container { max-width: 640px; margin: 40px auto; background: #fff; padding: 24px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,.1); }
h1 { text-align: center; margin-top: 0; }
.form { display: flex; flex-wrap: wrap; gap: 8px; }
.form input { flex: 1 1 200px; padding: 10px; border: 1px solid #ccc; border-radius: 6px; }
button { padding: 10px 14px; border: 0; border-radius: 6px; background: #2563eb; color: #fff; cursor: pointer; }
button.secondary { background: #6b7280; }
button.danger { background: #dc2626; }
button.success { background: #16a34a; }
.hidden { display: none; }
.error { color: #dc2626; min-height: 1em; }
ul { list-style: none; padding: 0; }
li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 12px; border-bottom: 1px solid #eee; }
li.done .title { text-decoration: line-through; color: #888; }
.title { font-weight: bold; }
.desc { font-size: 14px; color: #555; }
.actions { display: flex; gap: 6px; flex-shrink: 0; }