.facebook-auth-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:10px;background:#1877f2;border:none;border-radius:4px;color:#ffffff;font-size:inherit;font-weight:700;cursor:pointer;transition:background-color .3s,box-shadow .3s;box-shadow:0 1px 2px rgba(0,0,0,.1)}.facebook-auth-btn:hover:not(:disabled){background:#166fe5;box-shadow:0 2px 4px rgba(0,0,0,.2)}.facebook-auth-btn:disabled{opacity:.65;cursor:not-allowed}.facebook-auth-btn .fb-icon{color:#ffffff;margin-right:8px}.facebook-auth-btn .fb-text{color:#ffffff}.fb-loading-spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:#ffffff;border-radius:50%;animation:fb-spin .8s linear infinite}@keyframes fb-spin{to{transform:rotate(1turn)}}.fb-user-avatar{width:28px;height:28px;border-radius:50%;overflow:hidden;flex-shrink:0;margin-left:10px;border:2px solid rgba(255,255,255,.8);box-shadow:0 1px 3px rgba(0,0,0,.2)}.fb-avatar-img{width:100%;height:100%;object-fit:cover;border-radius:50%}.facebook-auth-btn.has-user{background:#1877f2;padding:8px 16px}.facebook-auth-btn.has-user .fb-text{font-weight:600;font-size:14px;white-space:nowrap}@media (max-width:480px){.fb-user-avatar{width:20px;height:20px}}