h2 {
    z-index:  5;
    position: relative;
}

div.tool-card:hover {
    cursor: pointer;
}

.tool-hidden-btn {
    cursor:  pointer;
    padding:  10px 30px;
    border-radius: 30px;
    border:  none;
    font-weight:  600;
    background-color: inherit;
    color:  black;
    opacity:  90%;
    background-color: inherit;
    transition: all 0.3s;
    border:  3px solid rgba(255,255,255,0.85);
}

div.tool-card:hover .tool-hidden-btn {
    opacity:  100%;
    color:  black;
    background-color: rgba(255,255,255,0.85);
}

.dark-mode .tool-hidden-btn {
    color: white;
    border:  3px solid rgba(0,0,0,0.85);
    background-color:  inherit;
}
.dark-mode div.tool-card:hover .tool-hidden-btn {
    background-color:  rgba(0,0,0,0.85);
    color:  white;
}