:root{--bg: #0b1120;--surface: #0d1526;--card: #101c2e;--border: #1a2d42;--lime: #2ec4a0;--lime-dim: rgba(46, 196, 160, .15);--text: #e8f4f8;--text-mid: #a0c4cc;--muted: #4a7a8a;--danger: #ff5252;--gold: #f0c060;--radius: 14px;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px);font-family:DM Sans,system-ui,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;min-height:100dvh;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(46,196,160,.18),transparent),linear-gradient(180deg,#0b1120,#091828)}button,input,select{font:inherit}a{color:var(--lime)}.shell{max-width:440px;margin:0 auto;padding:calc(16px + var(--safe-top)) 16px calc(32px + var(--safe-bottom));min-height:100vh;min-height:100dvh}.brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}.brand-mark{width:36px;height:36px;flex-shrink:0;border-radius:10px;background:var(--lime);color:#0b1120;display:grid;place-items:center;font-family:Syne,sans-serif;font-weight:700;font-size:14px}.brand h1{font-family:Syne,sans-serif;font-size:18px;margin:0;letter-spacing:-.02em}.brand p{margin:0;color:var(--muted);font-size:12px}.support-line{margin:8px 0 0;text-align:center;font-size:12px;color:var(--muted)}.support-line a{word-break:break-all}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:12px}.merchant-row{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}.merchant-meta{min-width:0;flex:1}.merchant-meta strong{display:block;font-size:15px;line-height:1.3;word-break:break-word}.merchant-logo{width:44px;height:44px;flex-shrink:0;border-radius:10px;object-fit:cover;background:var(--surface);border:1px solid var(--border)}.merchant-logo-fallback{display:grid;place-items:center;font-weight:700}.merchant-support{display:inline-block;margin-top:4px;font-size:12px;word-break:break-all}.amount{font-family:Syne,sans-serif;font-size:clamp(26px,8vw,32px);font-weight:700;letter-spacing:-.03em;margin:4px 0 8px;line-height:1.15}.muted{color:var(--muted);font-size:13px;line-height:1.45}.text-mid{color:var(--text-mid);font-size:14px;line-height:1.45}.line-items{list-style:none;padding:0;margin:12px 0 0}.line-items li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-top:1px solid var(--border);font-size:14px}.line-items li span:first-child{min-width:0;word-break:break-word}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;border:none;border-radius:12px;padding:14px 16px;min-height:48px;font-weight:600;cursor:pointer;margin-top:8px;transition:transform .12s ease,opacity .12s ease;touch-action:manipulation}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--lime);color:#0b1120}.btn-ghost{background:transparent;color:var(--text-mid);border:1px solid var(--border)}.btn-danger{background:#ff525226;color:var(--danger)}.btn-row{display:flex;gap:8px}.btn-row .btn{flex:1}.input{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px 14px;color:var(--text);margin:6px 0 12px;font-size:16px;min-height:48px}.input:focus{outline:2px solid var(--lime);outline-offset:1px}label{display:block;font-size:13px;color:var(--text-mid)}.error{background:#ff52521f;color:#ff8a8a;border-radius:10px;padding:12px;font-size:13px;margin-bottom:12px}.info code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;background:#0000000f;padding:1px 5px;border-radius:4px}.test-banner{background:#f0c06026;color:var(--gold);border:1px solid rgba(240,192,96,.35);border-radius:10px;padding:10px 12px;font-size:12px;font-weight:600;margin-bottom:12px;text-align:center}.tabs{display:flex;gap:4px;background:var(--surface);border-radius:10px;padding:4px;margin-bottom:16px}.tab{flex:1;border:none;background:transparent;color:var(--muted);padding:10px;min-height:44px;border-radius:8px;cursor:pointer;font-weight:600;font-size:13px;touch-action:manipulation}.tab.active{background:var(--card);color:var(--text)}.pay-options{display:grid;gap:8px}.pay-option{text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px;min-height:56px;color:var(--text);cursor:pointer;touch-action:manipulation}.pay-option.selected{border-color:var(--lime);background:var(--lime-dim)}.pay-option strong{display:block;margin-bottom:2px}.pay-sticky{position:sticky;bottom:calc(8px + var(--safe-bottom));margin-top:12px;padding-top:4px;background:linear-gradient(180deg,transparent,var(--card) 28%);z-index:2}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--lime);border-radius:50%;animation:spin .8s linear infinite;margin:24px auto}@keyframes spin{to{transform:rotate(360deg)}}.center{text-align:center}.confirm-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;background:#050a14b8;display:flex;align-items:flex-end;justify-content:center;padding:16px;padding-bottom:calc(16px + var(--safe-bottom))}.confirm-sheet{width:100%;max-width:420px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 -8px 32px #00000059}.confirm-sheet h3{margin:0 0 8px;font-family:Syne,sans-serif;font-size:18px}@media (min-width: 480px){.shell{padding:24px 16px 48px}.confirm-overlay{align-items:center}}@media (max-width: 360px){.btn-row{flex-direction:column}.amount{font-size:24px}}