[data-focus="tooltip"] {
    border-radius: 0px;
}

.mdl-tooltip--top ::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #616161 transparent transparent transparent;
}

.mdl-tooltip--right ::after {
    content: "";
    position: absolute;
    top: 39%;
    right: 100%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent #616161 transparent transparent;
}

.mdl-tooltip--bottom ::after {
    content: "";
    position: absolute;
    bottom: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent #616161 transparent;
}

.mdl-tooltip--left ::after {
    content: "";
    position: absolute;
    top: 39%;
    left: 105%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent transparent #616161;
}