.hgb-guest-notice {
    position: relative;
    padding: 20px 40px 20px 20px;
    background: #f9f9f9;
    border-left: 4px solid #007cba;
    margin-bottom: 20px;
}

.hgb-close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    background: transparent;
    border: none;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    color: #666;
    padding: 0;
}

.hgb-close-btn:hover {
    color: #000;
}