:root {
    --transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}



.cha-btn {
    display: inline-block;
    text-decoration: none;
    position: relative;
    cursor: pointer;
    transition: var(--transition);


    background-size: 100% 100%;
    background-repeat: no-repeat;
    background-position: center;


    width: 178px;
    height: 50px;

    padding: 0;
    font-size: 0;
    text-indent: -9999px;
    overflow: hidden;


    border: none;
    background-color: transparent;
    box-shadow: none;


    transform: scale(1);
}


.cha-btn:hover {
    transform: scale(1.02);
}


.cha-btn:active {
    transform: scale(0.96);
    transition: transform 0.05s cubic-bezier(0.4, 0, 0.6, 1);
}


.cha-btn:active::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    transform: translate(-50%, -50%) scale(0);
    animation: click-ripple 0.3s ease-out;
    border-radius: 12px;
    pointer-events: none;
}

@keyframes click-ripple {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0;
    }
}








.theme-aurora {
    background-image: url('https://s3.buymeacha.com/cdn/assets/buy-me-a-cha-1.png') !important;
}

.theme-ocean {
    background-image: url('https://s3.buymeacha.com/cdn/assets/buy-me-a-cha-2.png') !important;
}

.theme-neon {
    background-image: url('https://s3.buymeacha.com/cdn/assets/buy-me-a-cha-3.png') !important;
}


.cha-btn-small {
    width: 142px;
    height: 40px;
}



.cha-btn-xs {
    width: 107px;
    height: 30px;
}





@media (max-width: 480px) {
    .cha-btn {
        width: 142px;
        height: 40px;
    }
}


.cha-btn {
    background-size: contain;
    background-position: center;
}


.cha-btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}