.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
}

.login-btn:disabled {
    cursor: wait;
    filter: none;
    transform: none;
    box-shadow: 0 10px 28px rgba(47, 111, 159, .28);
}

.login-spinner:not([hidden]) {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: login-spin .8s linear infinite;
}

.login-status {
    min-height: 36px;
    margin-top: 10px;
    color: #506779;
    font-size: 12px;
    line-height: 18px;
    text-align: center;
}

@keyframes login-spin {
    to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
    .login-spinner:not([hidden]) { animation: none; }
}