.notification-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    position: relative;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.notification-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.notification-btn svg {
    width: 22px;
    height: 22px;
}

.notification-btn .spinner-icon {
    display: none;
}

.notification-btn.loading .bell-icon {
    opacity: 0.2;
}

.notification-btn.loading .spinner-icon {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--primary-color);
    animation: spin 1s linear infinite;
}

.notification-btn.subscribed .bell-icon {
    color: var(--green);
    fill: rgba(7, 102, 0, 0.1);
    animation: ring 0.8s ease-out;
}

html[data-theme="dark"] .notification-btn.subscribed .bell-icon {
    color: #66bb6a;
    fill: rgba(102, 187, 106, 0.15);
}

.notification-btn.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

@keyframes ring {
    0% { transform: rotate(0); }
    10% { transform: rotate(30deg); }
    20% { transform: rotate(-25deg); }
    30% { transform: rotate(20deg); }
    40% { transform: rotate(-15deg); }
    50% { transform: rotate(10deg); }
    60% { transform: rotate(-5deg); }
    70% { transform: rotate(0); }
    100% { transform: rotate(0); }
}

.notification-btn .bell-off-icon {
    display: none;
}
.notification-btn.disabled .bell-icon {
    display: none;
}
.notification-btn.disabled .bell-off-icon {
    display: block;
}