*{box-sizing:border-box}body{margin:0;background:#f3f6fa;color:#18202a;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.wrap{max-width:1050px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.brand{display:flex;gap:14px;align-items:center}.logo{width:52px;height:52px;border-radius:14px;background:#111827;color:#fff;display:grid;place-items:center;font-weight:800}h1{margin:0;font-size:25px}header p{margin:3px 0;color:#687385}header button{border:0;background:#fff;border-radius:12px;padding:12px;font-size:20px}main{display:flex;gap:22px}.card{background:#fff;border-radius:20px;padding:24px;box-shadow:0 8px 30px #18202a12;flex:1}.preview{max-width:390px}label{font-weight:650;display:block;margin-bottom:8px}textarea{width:100%;height:150px;resize:vertical;border:1px solid #d5dce5;border-radius:13px;padding:14px;font:inherit;font-size:16px}.controls{display:flex;gap:12px;margin-top:16px}.controls>div{flex:1}select{width:100%;padding:12px;border:1px solid #d5dce5;border-radius:11px;background:white;font:inherit}.generate,.buttons button{border:0;border-radius:12px;padding:13px 18px;font-weight:700;font-size:15px;cursor:pointer}.generate{width:100%;margin-top:18px;background:#111827;color:white}.buttons{display:flex;gap:10px;margin-top:18px}.buttons button{flex:1;background:#111827;color:white}.buttons button:disabled{opacity:.35}.qrbox{min-height:300px;border:2px dashed #dbe1e8;border-radius:16px;display:grid;place-items:center;padding:18px}.qrbox img{width:100%;max-width:320px;image-rendering:pixelated}.qrbox div,.hint,footer,#msg{color:#707b8b;font-size:13px}footer{text-align:center;padding:20px}.dark{background:#111827;color:#eef2f7}.dark .card{background:#1f2937}.dark textarea,.dark select,.dark header button{background:#111827;color:#eef2f7;border-color:#374151}@media(max-width:800px){main{flex-direction:column}.preview{max-width:none}.wrap{padding:14px}}