.mfa-challenge-overlay{z-index:1000;background:#0009;justify-content:center;align-items:center;padding:1rem;animation:.2s fadeIn;display:flex;position:fixed;inset:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.mfa-challenge-modal{background:var(--gr-bg-elev);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);width:100%;max-width:450px;padding:2rem;animation:.3s slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.mfa-challenge-header{text-align:center;margin-bottom:2rem}.mfa-challenge-header h2{font-size:var(--text-xl);color:var(--gr-ink);margin-bottom:.5rem}.mfa-challenge-subtitle{font-size:var(--text-sm);color:var(--gr-ink-mute);line-height:1.5}.mfa-challenge-form{flex-direction:column;gap:1.5rem;display:flex}.mfa-challenge-input-container{justify-content:center;display:flex}.mfa-challenge-input{width:180px;height:56px;font-size:var(--text-3xl);text-align:center;letter-spacing:.5rem;border:2px solid var(--gr-line);border-radius:var(--radius-md);background:var(--gr-bg);color:var(--gr-ink);font-family:Courier New,monospace;transition:all .2s}.mfa-challenge-input:focus{border-color:var(--gr-accent-ink);box-shadow:0 0 0 3px color-mix(in oklab, var(--gr-accent-ink), transparent 80%);outline:none}.mfa-challenge-input:disabled{opacity:.6;cursor:not-allowed}.mfa-challenge-trust{justify-content:center;display:flex}.mfa-challenge-checkbox{font-size:var(--text-sm);color:var(--gr-ink-mute);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:.5rem;display:flex}.mfa-challenge-checkbox input[type=checkbox]{cursor:pointer;width:18px;height:18px}.mfa-challenge-checkbox input[type=checkbox]:disabled{cursor:not-allowed}.mfa-challenge-actions{justify-content:center;gap:1rem;display:flex}.mfa-challenge-actions .btn{flex:1;max-width:150px}.mfa-challenge-footer{border-top:1px solid var(--gr-line);text-align:center;margin-top:1.5rem;padding-top:1.5rem}.mfa-challenge-toggle{color:var(--gr-accent-ink);font-size:var(--text-sm);cursor:pointer;background:0 0;border:none;padding:.5rem;text-decoration:underline;transition:color .2s}.mfa-challenge-toggle:hover{color:color-mix(in oklab, var(--gr-accent-ink), var(--gr-ink) 12%)}.mfa-challenge-toggle:disabled{opacity:.5;cursor:not-allowed}@media (max-width:640px){.mfa-challenge-modal{padding:1.5rem}.mfa-challenge-input{width:150px;height:48px;font-size:var(--text-2xl);letter-spacing:.3rem}.mfa-challenge-actions .btn{font-size:var(--text-sm)}}