*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #F7931A;--primary-dark: #E6830F;--primary-light: #FFF3E6;--bg: #0f0f1a;--bg-card: #1a1a2e;--bg-input: #16213e;--text: #eaeaea;--text-dim: #8a8aa0;--text-muted: #5a5a7a;--success: #00C853;--error: #FF5252;--border: #2a2a4a;--border-active: #F7931A;--radius: 12px;--radius-sm: 8px;--shadow: 0 8px 32px rgba(0, 0, 0, .4)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}.page-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,#0f0f1a,#1a1040,#0f0f1a)}.payment-card{width:100%;max-width:480px;background:var(--bg-card);border-radius:20px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--border)}.card-header{display:flex;align-items:center;justify-content:space-between;padding:24px 28px 16px}.brand{display:flex;align-items:center;gap:10px}.brand-icon{font-size:28px;filter:drop-shadow(0 0 8px rgba(247,147,26,.5))}.brand-title{font-size:20px;font-weight:700;color:var(--text);letter-spacing:-.3px}.secure-badge{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--success);background:#00c8531a;padding:6px 12px;border-radius:20px;font-weight:500}.secure-icon{font-size:12px}.steps-bar{display:flex;align-items:center;justify-content:center;padding:0 28px 20px;gap:4px}.step-item{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-muted);font-weight:500;transition:color .3s}.step-item.active{color:var(--primary)}.step-item.done{color:var(--success)}.step-num{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;background:var(--bg-input);font-weight:600}.step-item.active .step-num{background:var(--primary);color:#000}.step-item.done .step-num{background:var(--success);color:#000}.step-line{width:24px;height:2px;background:var(--border);border-radius:1px}.card-body{padding:20px 28px 28px}.form-group{margin-bottom:20px}.form-label{display:block;font-size:13px;font-weight:600;color:var(--text-dim);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.input-wrapper{display:flex;align-items:center;background:var(--bg-input);border:2px solid var(--border);border-radius:var(--radius-sm);transition:border-color .2s;overflow:hidden}.input-wrapper:focus-within{border-color:var(--border-active)}.input-prefix{padding:0 12px;font-size:18px;font-weight:700;color:var(--primary);-webkit-user-select:none;user-select:none}.form-input{flex:1;background:transparent;border:none;color:var(--text);font-size:16px;padding:14px 12px 14px 0;outline:none;font-family:inherit}.form-input::placeholder{color:var(--text-muted)}.form-input[type=number]{-moz-appearance:textfield}.form-input[type=number]::-webkit-outer-spin-button,.form-input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.custom-amount{margin-top:12px}.preset-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.preset-btn{padding:10px 8px;border-radius:var(--radius-sm);border:2px solid var(--border);background:var(--bg-input);color:var(--text-dim);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}.preset-btn:hover{border-color:var(--primary);color:var(--primary);background:#f7931a0d}.preset-btn.active{border-color:var(--border-active);background:#f7931a26;color:var(--primary)}.preset-btn.custom{font-size:13px}.btc-estimate{display:flex;align-items:center;gap:6px;padding:12px 16px;background:#f7931a0f;border-radius:var(--radius-sm);font-size:14px;color:var(--text-dim);margin-bottom:20px;border:1px solid rgba(247,147,26,.1)}.estimate-icon{font-size:16px}.estimate-sats{color:var(--text-muted);font-size:12px;margin-left:auto}.error-msg{background:#ff52521a;border:1px solid rgba(255,82,82,.3);color:var(--error);padding:10px 14px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:16px}.pay-btn{width:100%;padding:16px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border:none;border-radius:var(--radius);color:#000;font-size:18px;font-weight:700;cursor:pointer;transition:all .2s;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:8px;letter-spacing:-.2px}.pay-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px #f7931a59}.pay-btn:active{transform:translateY(0)}.pay-btn:disabled{opacity:.7;cursor:not-allowed;transform:none;box-shadow:none}.bolt-icon{font-size:20px}.btn-loading{display:flex;align-items:center;gap:10px}.spinner{width:20px;height:20px;border:2px solid rgba(0,0,0,.2);border-top-color:#000;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.invoice-section{display:flex;flex-direction:column;gap:20px}.invoice-header{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:#00c8530f;border-radius:var(--radius-sm);border:1px solid rgba(0,200,83,.15)}.invoice-status{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--success)}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:pulse 1.5s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.invoice-timer{font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums}.invoice-amount{text-align:center;padding:12px 0}.amount-fiat{display:block;font-size:36px;font-weight:800;color:var(--text);letter-spacing:-1px}.amount-btc{font-size:14px;color:var(--text-dim);margin-top:4px;display:block}.qr-container{display:flex;flex-direction:column;align-items:center;gap:12px}.qr-wrapper{background:#fff;padding:16px;border-radius:var(--radius);box-shadow:0 4px 16px #0000004d}.qr-wrapper svg{display:block}.qr-placeholder{width:220px;height:220px;display:flex;align-items:center;justify-content:center;color:#999;font-size:14px}.qr-hint{font-size:12px;color:var(--text-muted)}.lnbc-section{display:flex;flex-direction:column;gap:10px}.lnbc-box{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px;overflow:hidden}.lnbc-text{font-size:11px;color:var(--text-dim);word-break:break-all;font-family:SF Mono,Fira Code,Consolas,monospace;line-height:1.5}.copy-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.copy-btn{padding:10px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-dim);font-size:12px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}.copy-btn:hover{border-color:var(--primary);color:var(--primary)}.invoice-meta{background:var(--bg-input);border-radius:var(--radius-sm);padding:12px;display:flex;flex-direction:column;gap:8px}.meta-item{display:flex;justify-content:space-between;align-items:center}.meta-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.3px}.meta-value{font-size:12px;color:var(--text-dim);font-weight:500}.mono{font-family:SF Mono,Fira Code,Consolas,monospace;font-size:11px}.invoice-footer{display:flex;align-items:center;justify-content:space-between}.secondary-btn{padding:10px 20px;background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-dim);font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}.secondary-btn:hover{border-color:var(--text-dim);color:var(--text)}.polling-indicator{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-muted)}.polling-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:pulse 1.5s infinite}.confirmed-section{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}.confirmed-icon{width:64px;height:64px;border-radius:50%;background:var(--success);display:flex;align-items:center;justify-content:center;font-size:32px;color:#000;font-weight:700;margin-top:8px}.confirmed-title{font-size:22px;font-weight:700;color:var(--success)}.confirmed-amount{font-size:28px;font-weight:800;color:var(--text)}.confirmed-btc{display:block;font-size:14px;font-weight:400;color:var(--text-dim);margin-top:4px}.confirmed-details{width:100%;background:var(--bg-input);border-radius:var(--radius-sm);padding:16px;display:flex;flex-direction:column;gap:10px}.detail-row{display:flex;justify-content:space-between;align-items:center;font-size:13px}.detail-row span:first-child{color:var(--text-muted)}.detail-row span:last-child{color:var(--text-dim);font-weight:500}.card-footer{padding:16px 28px;text-align:center;font-size:11px;color:var(--text-muted);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:6px}.separator{color:var(--border)}@media (max-width: 520px){.payment-card{border-radius:16px}.card-header{padding:20px 20px 12px}.card-body{padding:16px 20px 24px}.brand-title{font-size:18px}.preset-grid{grid-template-columns:repeat(3,1fr);gap:6px}.preset-btn{font-size:13px;padding:8px 6px}.amount-fiat{font-size:30px}.copy-actions{grid-template-columns:1fr}}