.btn {
    border-style: none;
    height: 40px;
    padding: 6px 12px;
    background-color: rgb(36, 167, 42);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
}

.btn.blue {
    background-color: rgb(62, 180, 235);
}

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