.bn-wrap{max-width:520px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:#1a1a1a}
.bn-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.bn-icon{font-size:34px;line-height:1}
.bn-title{font-size:22px!important;font-weight:600!important;margin:0 0 3px!important;padding:0!important;border:none!important;color:#1a1a1a!important}
.bn-sub{font-size:13px;color:#666;margin:0}
.bn-lbl{display:block;font-size:13px;font-weight:500;color:#555;margin-bottom:5px}
.bn-iw input{width:100%;box-sizing:border-box;padding:10px 12px;border:1px solid #d0d0d0;border-radius:8px;font-size:15px;font-family:monospace;color:#1a1a1a;background:#fff;outline:none}
.bn-iw input:focus{border-color:#059669;box-shadow:0 0 0 3px rgba(5,150,105,.1)}
.bn-group{margin-bottom:10px}
.bn-op-row{display:flex;gap:8px;justify-content:center;margin:10px 0}
.bn-opbtn{padding:9px 20px;font-size:18px;font-weight:700;border:1px solid #d0d0d0;border-radius:8px;background:#fff;color:#555;cursor:pointer}
.bn-opbtn.act{background:#dcfce7;color:#166534;border-color:#22C55E}
.bn-result-card{background:linear-gradient(135deg,#059669,#065F46);border-radius:12px;padding:18px 22px;color:#fff;margin-top:12px;text-align:center;animation:bn-in .22s ease}
@keyframes bn-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
.bn-res-main{font-size:18px;font-weight:700;font-family:monospace;word-break:break-all;line-height:1.5}
.bn-res-sub{font-size:13px;opacity:.8;margin-top:6px}
.bn-error{color:#dc2626;font-size:13px;padding:10px;background:#fee2e2;border-radius:8px}