:root{--bg:#0f172a;--card:#1e293b;--primary:#3b82f6;--text:#f8fafc;--muted:#94a3b8}body{background-color:var(--bg);color:var(--text);box-sizing:border-box;justify-content:center;align-items:center;min-height:100vh;margin:0;padding:1rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}.card{background:var(--card);box-sizing:border-box;border-radius:12px;width:100%;max-width:400px;padding:1.5rem;box-shadow:0 10px 25px #0000004d}h2{text-align:center;margin-top:0;font-size:1.5rem}.form-group{margin-bottom:1.25rem}label{color:var(--muted);margin-bottom:.5rem;font-size:.875rem;display:block}input{width:100%;color:var(--text);box-sizing:border-box;background:#0f172a;border:1px solid #334155;border-radius:6px;padding:.75rem;font-size:1rem}input:disabled{opacity:.5;cursor:not-allowed}button{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;width:100%;margin-top:.5rem;padding:.75rem;font-size:1rem;font-weight:700}button:hover:not(:disabled){opacity:.9}button:disabled{cursor:not-allowed;opacity:.6;background-color:#475569}.toggle-link{text-align:center;color:var(--muted);margin-top:1rem;font-size:.875rem}.toggle-link a{color:var(--primary);cursor:pointer;text-decoration:none}.toggle-link a.disabled{color:var(--muted);pointer-events:none;cursor:not-allowed}.token-box{border:1px dashed var(--primary);word-break:break-all;background:#0f172a;border-radius:6px;margin-top:1.5rem;padding:1rem;font-family:monospace;font-size:.8rem}.alert{color:#ef4444;text-align:center;margin-top:.5rem;font-size:.875rem}.success-message{color:#22c55e;text-align:center;margin-top:.5rem;font-size:.875rem}@media (width>=640px){.card{padding:2rem}}