.notif-center-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5); z-index: 10000;
    display: flex; align-items: center; justify-content: center;
}
.notif-center-window {
    background: white; border-radius: 16px; width: 90%; max-width: 420px; max-height: 80vh;
    display: flex; flex-direction: column; overflow: hidden;
}
.notif-center-header {
    padding: 16px; font-size: 18px; font-weight: 600;
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid #f0f0f0;
}
.notif-center-body { flex: 1; overflow-y: auto; padding: 8px; }
.notif-center-footer {
    padding: 12px; display: flex; gap: 8px; border-top: 1px solid #f0f0f0;
}
.notif-center-footer button {
    flex: 1; padding: 10px; border: none; border-radius: 8px; cursor: pointer;
    font-size: 13px; color: white;
}
.notif-center-item {
    padding: 12px; border-bottom: 1px solid #f0f0f0; cursor: pointer;
}
.notif-center-item.unread { background: #f0f7ff; }
.notif-center-title { font-weight: 600; font-size: 14px; }
.notif-center-body { font-size: 12px; color: #666; margin-top: 4px; }
.notif-center-time { font-size: 10px; color: #999; margin-top: 4px; }

.notif-center-footer button {
    flex: 1; padding: 10px; border: none; border-radius: 8px; cursor: pointer;
    font-size: 13px; color: white;
}
#notif-center-subscribe { background: #0066CC; }
#notif-center-clear { background: #dc3545; }