:root{--bg: #10131a;--ink: #eef1f6;--muted: #8b93a3;--line: #232838;--card: #161a24;--gold: #f5b301;--gold-ink: #241c00;--go: #f5b301;--err: #ff6b6b;--ok: #57d9a3;--radius: 14px}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:radial-gradient(1100px 500px at 50% -10%,#1a2030 0%,var(--bg) 55%);color:var(--ink);font-family:Inter,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;display:flex;align-items:center;justify-content:center;padding:24px}.stage{width:100%;max-width:460px}.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px 24px}.panel__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.brand{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:20px;letter-spacing:-.01em}.brand__num{color:var(--gold);box-shadow:inset 0 -6px #f5b3012e}.net{font-size:12px;font-weight:600;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 10px}.net[data-state=live]{color:#ffd66b;border-color:#f5b30166}.lesson{font-family:Space Grotesk,sans-serif;font-weight:600;font-size:26px;line-height:1.15;letter-spacing:-.02em;margin:0 0 8px}.sub{color:var(--muted);font-size:14.5px;line-height:1.5;margin:0 0 22px;max-width:42ch}.ledger{display:flex;align-items:baseline;justify-content:space-between;padding:16px 18px;border:1px dashed var(--line);border-radius:12px;margin-bottom:20px}.ledger__label{color:var(--muted);font-size:13px}.ledger__value{font-family:Space Grotesk,sans-serif;font-size:18px}.ledger__value b{font-size:30px;font-weight:700;letter-spacing:-.02em}.field{margin-bottom:18px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}.field input{width:100%;background:#0f121a;border:1px solid var(--line);border-radius:10px;color:var(--ink);font-family:SFMono-Regular,ui-monospace,Menlo,monospace;font-size:14px;padding:13px 14px;transition:border-color .15s ease}.field input::placeholder{color:#5b6274;font-family:Inter,sans-serif}.field input:focus{outline:none;border-color:var(--gold)}.field__err{color:var(--err);font-size:13px;margin:8px 0 0}.account{border:1px solid var(--line);border-radius:12px;padding:6px 16px;margin-bottom:18px}.account__row{display:flex;justify-content:space-between;align-items:center;padding:11px 0}.account__row+.account__row{border-top:1px solid var(--line)}.account__k{color:var(--muted);font-size:13px}.account__v{font-size:14px}.mono{font-family:ui-monospace,Menlo,monospace}.actions{display:grid;gap:10px}.btn{border:0;border-radius:11px;font-family:Inter,sans-serif;font-size:15px;font-weight:600;padding:15px 18px;cursor:pointer;transition:transform .05s ease,background .15s ease,opacity .15s ease}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.btn--ghost:hover:not(:disabled){border-color:#39415a}.btn--go{background:var(--go);color:var(--gold-ink)}.btn--go:hover:not(:disabled){background:#ffc21f}.result{margin-top:18px}.result__msg{font-size:14px;line-height:1.5;margin:0}.result__msg[data-tone=ok]{color:var(--ok)}.result__msg[data-tone=err]{color:var(--err)}.result__link{display:inline-block;margin-top:8px;color:var(--gold);font-size:14px;font-weight:600;text-decoration:none}.result__link:hover{text-decoration:underline}.foot{text-align:center;color:var(--muted);font-size:12.5px;line-height:1.5;margin:16px 4px 0}.foot b{color:var(--ink);font-weight:600}@media (prefers-reduced-motion: reduce){*{transition:none!important}}