.checkout-login-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);z-index:1500;display:flex;align-items:center;justify-content:center}.checkout-login-popup{background:white;border-radius:8px;max-width:420px;width:90%;max-height:90vh;overflow-y:auto;box-shadow:0 4px 20px rgba(0,0,0,0.3)}.checkout-login-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid #eee}.checkout-login-header h3{margin:0;font-size:1.4em}.checkout-login-close{background:none;border:none;font-size:28px;cursor:pointer;color:#666;padding:0;line-height:1}.checkout-login-close:hover{color:#333}.checkout-login-body{padding:20px}.checkout-login-message{text-align:center;color:#666;margin-bottom:20px}.checkout-login-divider{text-align:center;margin:20px 0;position:relative}.checkout-login-divider::before{content:'';position:absolute;left:0;top:50%;width:100%;height:1px;background:#ddd}.checkout-login-divider span{background:inherit;padding:0 15px;position:relative;color:#999}.checkout-login-sso .btn{margin-bottom:10px}.checkout-login-footer{text-align:center;margin-top:20px;padding-top:15px;border-top:1px solid #eee;color:#666}.checkout-login-footer a{color:#337ab7}