#sis-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

#sis-modal {
    background: #fff;
    max-width: 420px;
    padding: 24px;
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0,0,0,.3);
}

#sis-modal h3 {
    margin-top: 0;
}

#sis-close {
    margin-top: 16px;
    padding: 8px 16px;
    background: #0073aa;
    color: #fff;
    border: none;
    cursor: pointer;
}

#sis-close:hover {
    background: #005d8f;
}
.sis-notification-item {
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.sis-notification-item:last-child {
    border-bottom: none;
}

.sis-notification-item h4 {
    margin: 0 0 6px;
    font-size: 16px;
}