:root{--bg: #0f1115;--panel: #1a1d24;--text: #f2f3f5;--muted: #9aa1ad;--accent: #ffd400;--error: #ff6b6b;--ok: #4ade80}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif}.shell{max-width:480px;margin:0 auto;padding:24px 16px}header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:24px}.brand{font-weight:800;letter-spacing:2px}.promo-name{color:var(--accent);font-weight:600}.panel{background:var(--panel);border-radius:12px;padding:24px}h2{margin-top:0}label{display:block;margin:16px 0;font-size:14px;color:var(--muted)}input{display:block;width:100%;margin-top:6px;padding:12px;border-radius:8px;border:1px solid #333;background:#11141a;color:var(--text);font-size:16px}.btn{display:inline-block;width:100%;padding:12px;margin-top:8px;border:none;border-radius:8px;background:var(--accent);color:#111;font-weight:700;font-size:16px;cursor:pointer;text-align:center;text-decoration:none}.btn:disabled{opacity:.5;cursor:default}.link{background:none;border:none;color:var(--muted);margin-top:12px;cursor:pointer;text-decoration:underline}.card{background:#11141a;border:1px solid var(--accent);border-radius:12px;padding:16px;margin:16px 0}.amount{font-size:28px;font-weight:800;color:var(--accent);margin-bottom:12px}.field{display:flex;align-items:center;gap:8px;margin:8px 0}.field-label{color:var(--muted);font-size:13px;min-width:52px}.field code{flex:1;background:#0b0d11;padding:8px 10px;border-radius:6px;font-size:15px;word-break:break-all}.copy{background:#2a2f3a;color:var(--text);border:none;border-radius:6px;padding:8px 10px;cursor:pointer;font-size:13px}.notice{color:var(--accent);font-size:14px}.error{color:var(--error)}.ok{color:var(--ok);font-weight:600}.hint{color:var(--muted);font-size:13px}.position{font-size:15px}footer{margin-top:24px;color:var(--muted);font-size:12px;text-align:center}footer a{color:var(--muted)}