/* Custom animations and effects */
@keyframes float-up {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px);
    }
}

@keyframes pulse-scale {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Cookie button special effects */
.cookie-button {
    background: linear-gradient(45deg, #000 0%, #222 50%, #000 100%);
    background-size: 200% 100%;
    animation: shimmer 3s infinite linear;
}

.cookie-button:active {
    transform: scale(0.95);
}

.cookie-icing {
    background: radial-gradient(circle, transparent 30%, #000 30%, #000 32%, transparent 32%);
    transition: all 0.2s ease;
}

/* Thin stroke buttons */
.btn-stroke {
    border-width: 1px !important;
    transition: all 0.2s ease;
}

.btn-stroke:hover {
    border-width: 2px !important;
    transform: translateX(2px);
}

/* Disabled state */
.btn-disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Floating numbers */
.floating-number {
    position: fixed;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    font-size: 1.5rem;
    pointer-events: none;
    z-index: 1000;
    animation: float-up 1s ease-out forwards;
}

/* Scrollbar styling */
#upgrades-container::-webkit-scrollbar,
generators-list::-webkit-scrollbar {
    width: 4px;
}

#upgrades-container::-webkit-scrollbar-track,
generators-list::-webkit-scrollbar-track {
    background: #f0f0f0;
}

#upgrades-container::-webkit-scrollbar-thumb,
generators-list::-webkit-scrollbar-thumb {
    background: #000;
    border-radius: 2px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .cookie-button {
        width: 12rem;
        height: 12rem;
    }
    
    .cookie-icing {
        width: 10rem;
        height: