.btn-black{
    /* background-color: #000; */
    color: #fff;
    --bs-btn-color: #fff;
    --bs-btn-bg: #000000;
    --bs-btn-border-color: #212529;
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: #424649;
    --bs-btn-hover-border-color: #373b3e;
    --bs-btn-focus-shadow-rgb: 66, 70, 73;
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: #4d5154;
    --bs-btn-active-border-color: #373b3e;
    --bs-btn-active-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
    --bs-btn-disabled-color: #fff;
    --bs-btn-disabled-bg: #212529;
    --bs-btn-disabled-border-color: #212529;
}