h1 {
    font-size: 4rem;
}

h2 {
    font-size: 2rem;
}

.body {
    padding: 1em;
}

.tools {
    margin-top: 1em;
}

.tool_image {
    width: 40px;
}

.tool_div {
    background-size: auto 100%;
    background-repeat: no-repeat;
    background-position: center;
    border: solid black 1px;
    width: 15em;
    height: 20em;
    color: white;
    line-height: 2;
    text-align: center;
    cursor: pointer;
    position: relative;
    display: inline-block;
    margin: 2em;

}

.filter {
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: gray;
    opacity: 80%;
}

.filter:hover {
    opacity: 90%;
}

.link {
    font-size: 3em;
    color: black;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}