button,
.btn {
    color: #000;
}

button:hover,
.btn:hover {
    color: #000;
    background-color: rgba(158,158,158,.2);
}

button.trigger:hover {
    background-color: inherit;
}

.btn--black,
.btn--black:hover,
.btn--blue,
.btn--blue:hover,
.button--primary,
.button--primary:hover,
.btn--green,
.btn--green:hover {
    color: #f7f7f7;
}

.btn--black {
    background-color: #303030;
}

.btn--black:hover {
    background-color: #1c1c1c;
}

.btn--blue {
    background-color: #B81B58;
}

.btn--blue:hover {
    background-color: #921546;
}

.button--primary {
    background-color: #0089b4;
}

.button--primary:hover {
    background-color: #007ba3;
}

.btn--green {
    background-color: #4caf50;
}

.btn--green:hover {
    background-color: #43A047;
}