html,body{margin:0;padding:0;background-color:#0d1528}.mfa-challenge-backdrop{--navy: #0d1b2a;--navy-mid: #1e3448;--navy-light: #2b4a68;--amber: #e8a020;--amber-dim: rgba(232, 160, 32, .12);--amber-border: rgba(232, 160, 32, .3);--white: #ffffff;--slate: #8da5bb;--slate-dim: #5c7a96;--border: rgba(141, 165, 187, .18);position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;background:var(--navy);padding:24px}@keyframes mfaChallengeSpin{to{transform:rotate(360deg)}}.mfa-challenge-card{width:400px;max-width:100%;background:var(--navy-mid);border:1px solid var(--border);border-radius:12px;padding:40px;box-shadow:0 32px 64px #00000080}.mfa-challenge-brand{display:flex;align-items:center;gap:10px;margin-bottom:28px}.mfa-challenge-logo{width:32px;height:32px;border-radius:8px;background:var(--amber);color:var(--navy);display:flex;align-items:center;justify-content:center;flex-shrink:0}.mfa-challenge-wordmark{font-family:Space Grotesk,sans-serif;font-weight:600;font-size:17px;color:var(--white)}.mfa-challenge-amber{color:var(--amber)}.mfa-challenge-title{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:22px;color:var(--white);margin:0 0 12px}.mfa-challenge-body{font-family:Inter,sans-serif;font-size:14px;color:var(--slate-dim);line-height:1.55;margin:0 0 28px}.mfa-challenge-form{display:flex;flex-direction:column}.mfa-challenge-label{font-family:Inter,sans-serif;font-size:13px;font-weight:500;color:var(--white);margin-bottom:8px}.mfa-challenge-input{width:100%;box-sizing:border-box;background:var(--navy);border:1px solid var(--border);border-radius:6px;padding:10px 14px;color:var(--white);font-family:JetBrains Mono,monospace;font-size:24px;text-align:center;letter-spacing:.3em;transition:border-color .15s,box-shadow .15s}.mfa-challenge-input::placeholder{color:var(--slate-dim);letter-spacing:.3em}.mfa-challenge-input:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-dim)}.mfa-challenge-input:disabled{opacity:.6;cursor:not-allowed}.mfa-challenge-error{margin:8px 0 0;font-family:Inter,sans-serif;font-size:13px;color:#ef4444}.mfa-challenge-submit{margin-top:20px;width:100%;height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--amber);color:var(--navy);font-family:Space Grotesk,sans-serif;font-weight:600;font-size:15px;border:none;border-radius:6px;cursor:pointer;transition:filter .15s}.mfa-challenge-submit:hover:not(:disabled){filter:brightness(1.1)}.mfa-challenge-submit:disabled{opacity:.6;cursor:not-allowed}.mfa-challenge-spinner{animation:mfaChallengeSpin .8s linear infinite}.mfa-challenge-switch{display:block;margin:20px auto 0;background:transparent;border:none;color:var(--slate);font-family:Inter,sans-serif;font-size:13px;text-decoration:underline;cursor:pointer;padding:0}.mfa-challenge-switch:hover{color:var(--white)}@media (max-width: 480px){.mfa-challenge-card{padding:28px}}.toast-stack{position:fixed;top:20px;right:20px;z-index:1000;display:flex;flex-direction:column;gap:10px;max-width:360px}.toast{background:var(--navy-light, #1a2540);border:1px solid var(--border, rgba(255, 255, 255, .1));border-left:3px solid var(--slate, #94a3b8);border-radius:var(--radius-sm, 6px);padding:12px 16px;font-family:Inter,sans-serif;font-size:13px;color:var(--white, #f8fafc);box-shadow:0 8px 24px #00000059;animation:toastSlideIn .2s ease-out}.toast-success{border-left-color:var(--green, #22c55e)}.toast-error{border-left-color:var(--coral, #ef4444)}.toast-info{border-left-color:var(--amber, #f59e0b)}@keyframes toastSlideIn{0%{opacity:0;transform:translate(12px)}to{opacity:1;transform:translate(0)}}