.button {
    border-style: none;
    height: 40px;
    padding: 6px 12px;
    background-color: black;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: box-shadow .6s ease;
}

.button.blue {
    background-color: var(--orange);
}

.button.green {
    background-color: var(--green);
}

.button.red {
    background-color: var(--pink);
}

.button:hover {
    box-shadow: inset 200px 0 0 #00000055;
}

@media (max-width: 500px) {

    .button.mobile {
        color: transparent;
        font-size: 0;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        position: fixed;
        top: 85vh;
        left: 80vw;
    }
    .button.mobile::before {
        content: "+";
        color: black;
        font-size: 2rem;
        width: 100%;
        height: 100%;
    }
    
}