body { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; background: #eceff1; display: flex; justify-content: center; padding: 40px 20px; }
.container { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.08); width: 100%; max-width: 480px; text-align: center; }
h1 { color: #2c3e50; margin-bottom: 1.5rem; }
textarea { width: 100%; height: 100px; margin: 15px 0; padding: 12px; border: 1px solid #cfd8dc; border-radius: 6px; font-size: 1rem; resize: none; }
select { width: 100%; padding: 10px; border-radius: 6px; border: 1px solid #cfd8dc; margin-bottom: 10px; }
.options { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; font-size: 0.9rem; }
#qrcode-container { margin: 25px auto; padding: 15px; background: #fff; border: 2px dashed #ecf0f1; min-height: 256px; }
button { background: #27ae60; color: white; border: none; padding: 12px 25px; border-radius: 6px; font-weight: bold; cursor: pointer; width: 100%; font-size: 1rem; }
button:hover { background: #219150; }
.download-btns { margin-top: 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.dl-btn { background: #34495e; font-size: 0.85rem; padding: 10px; }
.dl-btn:hover { background: #2c3e50; }