* { box-sizing: border-box; }
body { font-family: system-ui, Arial, sans-serif; margin: 0; background: #f6f7f9; color: #222; }
.container { max-width: 640px; margin: 48px auto; background: #fff; border: 1px solid #e5e7eb; border-radius: 8px; padding: 24px; box-shadow: 0 6px 20px rgba(0,0,0,0.06); }
.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 16px; }
.input-row button { padding: 10px 16px; background: #2563eb; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
.input-row button:hover { background: #1d4ed8; }
.error { margin-top: 8px; padding: 8px 10px; background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; border-radius: 6px; }
.list { list-style: none; padding: 0; margin: 16px 0 0; }
.list li { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border: 1px solid #e5e7eb; border-radius: 6px; margin-bottom: 8px; }
.list li .text { flex: 1; }
.list li .del { margin-left: 12px; background: #ef4444; color: #fff; border: none; border-radius: 6px; padding: 6px 10px; cursor: pointer; }
.list li .del:hover { background: #dc2626; }