body,
html {
    margin: 0;
    padding: 0;
    position: fixed;
    background: black;
}

.header {
    position: static !important;
}

.buymeacoffee {
    text-decoration: none;
    position: fixed;
    right: 2rem;
    bottom: 2rem;
    background: #FFDD00;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    transition: all 0.1s linear;
    box-shadow: 0.2rem 0.2rem 0.5rem rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.buymeacoffee:hover {
    width: 4rem;
    height: 4rem;
    line-height: 4rem;
}