i.material-icons {
    font-size: 1.5rem;
    color: white;
    position: relative;
    border-radius: 50%;
    padding: 5px;
    margin: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    transition: color 0.2s ease, background-color 0.2s ease, transform 0.3s ease;
}

i.material-icons:after {
    content: "";
    width: 100%;
    height: 100%;
    border: solid 2px;
    transform: scale(0.8);
    position: absolute;
    top: -2px;
    left: -2px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

i.material-icons:hover:after {
    transform: scale(1);
    box-shadow: 10px 0 20px rgba(0, 0, 0, 0.23), 6px 0 6px rgba(0, 0, 0, 0.23);
}

i.material-icons:nth-of-type(1) {
    background-color: #259517;
}

i.material-icons:nth-of-type(1):hover {
    color: #259517;
}

i.material-icons:nth-of-type(1):after {
    border-color: #259517;
}

i.material-icons:nth-of-type(2) {
    background-color: #ce0025;
}

i.material-icons:nth-of-type(2):hover {
    color: #ce0025;
}

i.material-icons:nth-of-type(2):after {
    border-color: #ce0025;
}

i.material-icons:nth-of-type(3) {
    background-color: #294ecd;
}

i.material-icons:nth-of-type(3):hover {
    color: #294ecd;
}

i.material-icons:nth-of-type(3):after {
    border-color: #294ecd;
}


i.material-icons:nth-of-type(4) {
    background-color: #929194;
}

i.material-icons:nth-of-type(4):hover {
    color: #929194;
}

i.material-icons:nth-of-type(4):after {
    border-color: #929194;
}

i.material-icons:hover {
    background-color: transparent;
    transform: rotate(90deg);
    cursor: pointer;
    box-shadow: none;
}

@media (min-width:601px) {
    i.material-icons {
        padding:10px;
        margin:5px;
        font-size:2rem;
    }
}

@media (min-width:993px) {
    i.material-icons {
        padding:20px;
        margin:20px;
        font-size:8rem;
    }
    i.material-icons:after {
        border-width:3px;
        top:-3px;
        left:-3px;
    }
}
div.first {
    /*setting alpha = 0.1*/
    background: rgba(255, 255, 255, 0.7);
    font-weight: bold;
    font-size: 50px;
    color: white;
    border: solid 1px rgba(0,0,0,0.1);
    border-radius: 12px;
}