.lbc-container, .lbc-bill{max-width:640px;margin:40px auto;padding:24px;border-radius:12px;background:#fff;box-shadow:0 6px 20px rgba(0,0,0,.07)}
.lbc-container h2{margin-top:0}
.lbc-form{display:flex;gap:12px}
.lbc-form input{flex:1;padding:12px 14px;border:1px solid #e3e3e3;border-radius:10px;font-size:16px}
.lbc-form button{padding:12px 18px;border:0;border-radius:10px;background:#0e78f9;color:#fff;font-weight:600;cursor:pointer}
.lbc-form button:hover{filter:brightness(.95)}
.lbc-helper{font-size:12px;color:#666;margin-top:8px}
.lbc-bill h1{margin:0 0 8px}
.lbc-bill h3{margin:0 0 18px;font-weight:500}
.lbc-bill button{padding:12px 18px;border:0;border-radius:10px;background:#0e78f9;color:#fff;font-weight:600;cursor:pointer}
.lbc-note{font-size:12px;color:#666;margin-top:10px}
@media (max-width:520px){.lbc-form{flex-direction:column}}
.lbc-logo{width:40px;height:auto;margin-left:8px;vertical-align:middle}
@media (max-width:520px){.lbc-logo{width:32px}}

/* Enhanced bill-page-html styles */
.lbc-bill.enhanced {
  max-width: 500px;
  margin: 50px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,.1);
  padding: 32px 24px;
  text-align: center;
}
.lbc-header { margin-bottom: 20px; }
.lbc-logo-top { width: 80px; height: auto; }
.lbc-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 1.8em;
  margin: 0 0 16px;
}
.lbc-bill-icon svg { stroke: #0e78f9; }
.lbc-open-btn {
  background: #0e78f9;
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
}
.lbc-open-btn:hover { background: #0c66d1; }


/* v1.0.3 viewer enhancements */
.lbc-bill.enhanced.lbc-enhanced-v103{border:2px solid #eef3ff}
.lbc-bill.enhanced{max-width:500px;margin:50px auto;background:#fff;border-radius:16px;box-shadow:0 6px 18px rgba(0,0,0,.1);padding:32px 24px;text-align:center}
.lbc-header{margin-bottom:20px}
.lbc-logo-top{width:80px;height:auto}
.lbc-title{display:flex;align-items:center;justify-content:center;gap:10px;font-size:1.8em;margin:0 0 16px}
.lbc-bill-icon svg{stroke:#0e78f9}
.lbc-open-btn{background:#0e78f9;color:#fff;border:none;padding:12px 24px;border-radius:10px;font-size:1rem;cursor:pointer}
.lbc-open-btn:hover{background:#0c66d1}

/* v1.0.4 viewer enhancements */
.lbc-bill.enhanced.lbc-enhanced-v104{border:2px solid #e6eefc}
.lbc-bill.enhanced{max-width:500px;margin:50px auto;background:#fff;border-radius:16px;box-shadow:0 6px 18px rgba(0,0,0,.1);padding:32px 24px;text-align:center}
.lbc-header{margin-bottom:20px}
.lbc-logo-top{width:80px;height:auto}
.lbc-title{display:flex;align-items:center;justify-content:center;gap:10px;font-size:1.8em;margin:0 0 16px}
.lbc-bill-icon svg{stroke:#0e78f9}
.lbc-open-btn{background:#0e78f9;color:#fff;border:none;padding:12px 24px;border-radius:10px;font-size:1rem;cursor:pointer}
.lbc-open-btn:hover{background:#0c66d1}

/* v1.0.5: make anchor look like a button */
.lbc-open-btn{display:inline-block;text-decoration:none}

/* v1.0.6 */
.lbc-bill.enhanced.lbc-enhanced-v106{border:2px solid #e6eefc}
.lbc-bill.enhanced{max-width:500px;margin:50px auto;background:#fff;border-radius:16px;box-shadow:0 6px 18px rgba(0,0,0,.1);padding:32px 24px;text-align:center}
.lbc-header{margin-bottom:20px}
.lbc-logo-top{width:80px;height:auto}
.lbc-title{display:flex;align-items:center;justify-content:center;gap:10px;font-size:1.8em;margin:0 0 16px}
.lbc-bill-icon svg{stroke:#0e78f9}
.lbc-open-btn{display:inline-block;text-decoration:none;background:#0e78f9;color:#fff;border:none;padding:12px 24px;border-radius:10px;font-size:1rem;cursor:pointer}
.lbc-open-btn:hover{background:#0c66d1}