:root{font-family:Inter,system-ui,Segoe UI,Arial,sans-serif;color:#17201c;background:#f7f7f2}body{margin:0}.shell{max-width:920px;margin:auto;padding:18px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}h1{font-size:32px;margin:0;color:#1f6f5b}h2{font-size:18px;margin:0 0 12px}.panel{background:white;border:1px solid #d9ded7;border-radius:8px;padding:16px;margin:12px 0;box-shadow:0 1px 2px #0000000d}input,textarea{width:100%;box-sizing:border-box;border:1px solid #b7c0b7;border-radius:6px;padding:11px;margin:6px 0;font-size:16px}button{background:#1f6f5b;color:white;border:0;border-radius:6px;padding:11px 14px;margin:6px 6px 6px 0;font-weight:700;cursor:pointer}button.secondary{background:#3b4750}button.danger{background:#9d2f2f}pre,.item{background:#f2f5f1;border-radius:6px;padding:10px;overflow:auto}.qr{width:160px;height:160px;border:1px solid #ddd}@media(max-width:640px){.shell{padding:12px}header{align-items:flex-start;gap:8px;flex-direction:column}}