:root{--bg: #0b0f14;--card: #131a22;--text: #e8edf2;--muted: #8a97a3;--accent: #3b82f6;--border: #223140}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.test-badge{background:#7c2d12;color:#fed7aa;text-align:center;font-size:12px;font-weight:700;letter-spacing:.5px;padding:8px}.checkout{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 36px);padding:20px}.checkout-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px 28px;width:100%;max-width:400px;text-align:center}.checkout-card h1{font-size:22px;margin:0 0 8px}.checkout-sub{color:var(--muted);font-size:14px;margin:0 0 24px}.btn{display:block;width:100%;padding:14px;border-radius:10px;border:none;font-size:15px;font-weight:700;cursor:pointer;margin-bottom:10px;background:var(--accent);color:#fff}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.hidden{display:none}.status-box{font-size:13px;padding:10px 12px;border-radius:8px;margin-bottom:16px;text-align:left}.status-box.hidden{display:none}.status-box.info{background:#1e293b;color:#93c5fd}.status-box.success{background:#052e16;color:#86efac}.status-box.error{background:#450a0a;color:#fca5a5}.wallet-info{font-size:12px;color:var(--muted);margin-bottom:16px}.wallet-info.hidden{display:none}.timing-log{text-align:left;font-size:11px;font-family:SF Mono,Menlo,monospace;color:var(--muted);border-top:1px solid var(--border);padding-top:12px;margin-top:8px}.timing-log.hidden{display:none}.timing-log div{padding:2px 0}