.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;

    min-width: 18px;
    height: 18px;
    padding: 0 5px;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    font-size: 11px;
    font-weight: 600;
    line-height: 1;

    border-radius: 999px;
}

@keyframes bell-shake {
    0%   { transform: rotate(0); }
    10%  { transform: rotate(-15deg); }
    20%  { transform: rotate(10deg); }
    30%  { transform: rotate(-10deg); }
    40%  { transform: rotate(6deg); }
    50%  { transform: rotate(-4deg); }
    60% { transform: rotate(10deg); }
    70% { transform: rotate(-10deg); }
    80% { transform: rotate(6deg); }
    90% { transform: rotate(-4deg); }
    100% { transform: rotate(0); }
}

/* efek getar */
.notif-bell.ring {
    animation: bell-shake 1s ease-in-out;
    transform-origin: top center;
    color: #ff9800; 
    text-shadow: 0 0 8px rgba(255,152,0,.7);
}